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 - 2023 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 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * Extract from the given disabled subchannel bitmap (raw format 93 * from the EHT Operation Element) the bits for the subchannel 94 * we're using right now. 95 */ 96 static u16 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation * eht_oper,struct cfg80211_chan_def * chandef,u16 bitmap)97 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper, 98 struct cfg80211_chan_def *chandef, u16 bitmap) 99 { 100 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 101 struct cfg80211_chan_def ap_chandef = *chandef; 102 u32 ap_center_freq, local_center_freq; 103 u32 ap_bw, local_bw; 104 int ap_start_freq, local_start_freq; 105 u16 shift, mask; 106 107 if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) || 108 !(eht_oper->params & 109 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) 110 return 0; 111 112 /* set 160/320 supported to get the full AP definition */ 113 ieee80211_chandef_eht_oper(eht_oper, true, true, &ap_chandef); 114 ap_center_freq = ap_chandef.center_freq1; 115 ap_bw = 20 * BIT(u8_get_bits(info->control, 116 IEEE80211_EHT_OPER_CHAN_WIDTH)); 117 ap_start_freq = ap_center_freq - ap_bw / 2; 118 local_center_freq = chandef->center_freq1; 119 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); 120 local_start_freq = local_center_freq - local_bw / 2; 121 shift = (local_start_freq - ap_start_freq) / 20; 122 mask = BIT(local_bw / 20) - 1; 123 124 return (bitmap >> shift) & mask; 125 } 126 127 /* 128 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a 129 * valid bitmap. 130 */ 131 static void ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data * link,const struct ieee80211_eht_operation * eht_oper,u16 bitmap,u64 * changed)132 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, 133 const struct ieee80211_eht_operation *eht_oper, 134 u16 bitmap, u64 *changed) 135 { 136 struct cfg80211_chan_def *chandef = &link->conf->chandef; 137 u16 extracted; 138 u64 _changed = 0; 139 140 if (!changed) 141 changed = &_changed; 142 143 while (chandef->width > NL80211_CHAN_WIDTH_40) { 144 extracted = 145 ieee80211_extract_dis_subch_bmap(eht_oper, chandef, 146 bitmap); 147 148 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 149 chandef)) 150 break; 151 link->u.mgd.conn_flags |= 152 ieee80211_chandef_downgrade(chandef); 153 *changed |= BSS_CHANGED_BANDWIDTH; 154 } 155 156 if (chandef->width <= NL80211_CHAN_WIDTH_40) 157 extracted = 0; 158 159 if (link->conf->eht_puncturing != extracted) { 160 link->conf->eht_puncturing = extracted; 161 *changed |= BSS_CHANGED_EHT_PUNCTURING; 162 } 163 } 164 165 /* 166 * We can have multiple work items (and connection probing) 167 * scheduling this timer, but we need to take care to only 168 * reschedule it when it should fire _earlier_ than it was 169 * asked for before, or if it's not pending right now. This 170 * function ensures that. Note that it then is required to 171 * run this function for all timeouts after the first one 172 * has happened -- the work that runs from this timer will 173 * do that. 174 */ run_again(struct ieee80211_sub_if_data * sdata,unsigned long timeout)175 static void run_again(struct ieee80211_sub_if_data *sdata, 176 unsigned long timeout) 177 { 178 sdata_assert_lock(sdata); 179 180 if (!timer_pending(&sdata->u.mgd.timer) || 181 time_before(timeout, sdata->u.mgd.timer.expires)) 182 mod_timer(&sdata->u.mgd.timer, timeout); 183 } 184 ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data * sdata)185 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 186 { 187 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 188 return; 189 190 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 191 return; 192 193 mod_timer(&sdata->u.mgd.bcn_mon_timer, 194 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 195 } 196 ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data * sdata)197 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 198 { 199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 200 201 if (unlikely(!ifmgd->associated)) 202 return; 203 204 if (ifmgd->probe_send_count) 205 ifmgd->probe_send_count = 0; 206 207 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 208 return; 209 210 mod_timer(&ifmgd->conn_mon_timer, 211 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 212 } 213 ecw2cw(int ecw)214 static int ecw2cw(int ecw) 215 { 216 return (1 << ecw) - 1; 217 } 218 219 static ieee80211_conn_flags_t ieee80211_determine_chantype(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,ieee80211_conn_flags_t conn_flags,struct ieee80211_supported_band * sband,struct ieee80211_channel * channel,u32 vht_cap_info,const struct ieee80211_ht_operation * ht_oper,const struct ieee80211_vht_operation * vht_oper,const struct ieee80211_he_operation * he_oper,const struct ieee80211_eht_operation * eht_oper,const struct ieee80211_s1g_oper_ie * s1g_oper,struct cfg80211_chan_def * chandef,bool tracking)220 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 221 struct ieee80211_link_data *link, 222 ieee80211_conn_flags_t conn_flags, 223 struct ieee80211_supported_band *sband, 224 struct ieee80211_channel *channel, 225 u32 vht_cap_info, 226 const struct ieee80211_ht_operation *ht_oper, 227 const struct ieee80211_vht_operation *vht_oper, 228 const struct ieee80211_he_operation *he_oper, 229 const struct ieee80211_eht_operation *eht_oper, 230 const struct ieee80211_s1g_oper_ie *s1g_oper, 231 struct cfg80211_chan_def *chandef, bool tracking) 232 { 233 struct cfg80211_chan_def vht_chandef; 234 struct ieee80211_sta_ht_cap sta_ht_cap; 235 ieee80211_conn_flags_t ret; 236 u32 ht_cfreq; 237 238 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 239 chandef->chan = channel; 240 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 241 chandef->center_freq1 = channel->center_freq; 242 chandef->freq1_offset = channel->freq_offset; 243 244 if (channel->band == NL80211_BAND_6GHZ) { 245 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 246 chandef)) { 247 mlme_dbg(sdata, 248 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 249 ret = IEEE80211_CONN_DISABLE_HT | 250 IEEE80211_CONN_DISABLE_VHT | 251 IEEE80211_CONN_DISABLE_HE | 252 IEEE80211_CONN_DISABLE_EHT; 253 } else { 254 ret = 0; 255 } 256 vht_chandef = *chandef; 257 goto out; 258 } else if (sband->band == NL80211_BAND_S1GHZ) { 259 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 260 sdata_info(sdata, 261 "Missing S1G Operation Element? Trying operating == primary\n"); 262 chandef->width = ieee80211_s1g_channel_width(channel); 263 } 264 265 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 266 IEEE80211_CONN_DISABLE_VHT | 267 IEEE80211_CONN_DISABLE_80P80MHZ | 268 IEEE80211_CONN_DISABLE_160MHZ; 269 goto out; 270 } 271 272 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 273 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 274 275 if (!ht_oper || !sta_ht_cap.ht_supported) { 276 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 277 ret = IEEE80211_CONN_DISABLE_HT | 278 IEEE80211_CONN_DISABLE_VHT | 279 IEEE80211_CONN_DISABLE_HE | 280 IEEE80211_CONN_DISABLE_EHT; 281 goto out; 282 } 283 284 chandef->width = NL80211_CHAN_WIDTH_20; 285 286 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 287 channel->band); 288 /* check that channel matches the right operating channel */ 289 if (!tracking && channel->center_freq != ht_cfreq) { 290 /* 291 * It's possible that some APs are confused here; 292 * Netgear WNDR3700 sometimes reports 4 higher than 293 * the actual channel in association responses, but 294 * since we look at probe response/beacon data here 295 * it should be OK. 296 */ 297 sdata_info(sdata, 298 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 299 channel->center_freq, ht_cfreq, 300 ht_oper->primary_chan, channel->band); 301 ret = IEEE80211_CONN_DISABLE_HT | 302 IEEE80211_CONN_DISABLE_VHT | 303 IEEE80211_CONN_DISABLE_HE | 304 IEEE80211_CONN_DISABLE_EHT; 305 goto out; 306 } 307 308 /* check 40 MHz support, if we have it */ 309 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 310 ieee80211_chandef_ht_oper(ht_oper, chandef); 311 } else { 312 mlme_dbg(sdata, "40 MHz not supported\n"); 313 /* 40 MHz (and 80 MHz) must be supported for VHT */ 314 ret = IEEE80211_CONN_DISABLE_VHT; 315 /* also mark 40 MHz disabled */ 316 ret |= IEEE80211_CONN_DISABLE_40MHZ; 317 goto out; 318 } 319 320 if (!vht_oper || !sband->vht_cap.vht_supported) { 321 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 322 ret = IEEE80211_CONN_DISABLE_VHT; 323 goto out; 324 } 325 326 vht_chandef = *chandef; 327 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 328 he_oper && 329 (le32_to_cpu(he_oper->he_oper_params) & 330 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 331 struct ieee80211_vht_operation he_oper_vht_cap; 332 333 /* 334 * Set only first 3 bytes (other 2 aren't used in 335 * ieee80211_chandef_vht_oper() anyway) 336 */ 337 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 338 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 339 340 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 341 &he_oper_vht_cap, ht_oper, 342 &vht_chandef)) { 343 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 344 sdata_info(sdata, 345 "HE AP VHT information is invalid, disabling HE\n"); 346 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 347 goto out; 348 } 349 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 350 vht_cap_info, 351 vht_oper, ht_oper, 352 &vht_chandef)) { 353 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 354 sdata_info(sdata, 355 "AP VHT information is invalid, disabling VHT\n"); 356 ret = IEEE80211_CONN_DISABLE_VHT; 357 goto out; 358 } 359 360 if (!cfg80211_chandef_valid(&vht_chandef)) { 361 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 362 sdata_info(sdata, 363 "AP VHT information is invalid, disabling VHT\n"); 364 ret = IEEE80211_CONN_DISABLE_VHT; 365 goto out; 366 } 367 368 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 369 ret = 0; 370 goto out; 371 } 372 373 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 374 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 375 sdata_info(sdata, 376 "AP VHT information doesn't match HT, disabling VHT\n"); 377 ret = IEEE80211_CONN_DISABLE_VHT; 378 goto out; 379 } 380 381 *chandef = vht_chandef; 382 383 /* 384 * handle the case that the EHT operation indicates that it holds EHT 385 * operation information (in case that the channel width differs from 386 * the channel width reported in HT/VHT/HE). 387 */ 388 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 389 struct cfg80211_chan_def eht_chandef = *chandef; 390 391 ieee80211_chandef_eht_oper(eht_oper, 392 eht_chandef.width == 393 NL80211_CHAN_WIDTH_160, 394 false, &eht_chandef); 395 396 if (!cfg80211_chandef_valid(&eht_chandef)) { 397 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 398 sdata_info(sdata, 399 "AP EHT information is invalid, disabling EHT\n"); 400 ret = IEEE80211_CONN_DISABLE_EHT; 401 goto out; 402 } 403 404 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 405 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 406 sdata_info(sdata, 407 "AP EHT information is incompatible, disabling EHT\n"); 408 ret = IEEE80211_CONN_DISABLE_EHT; 409 goto out; 410 } 411 412 *chandef = eht_chandef; 413 } 414 415 ret = 0; 416 417 out: 418 /* 419 * When tracking the current AP, don't do any further checks if the 420 * new chandef is identical to the one we're currently using for the 421 * connection. This keeps us from playing ping-pong with regulatory, 422 * without it the following can happen (for example): 423 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 424 * - AP advertises regdom US 425 * - CRDA loads regdom US with 80 MHz prohibited (old database) 426 * - the code below detects an unsupported channel, downgrades, and 427 * we disconnect from the AP in the caller 428 * - disconnect causes CRDA to reload world regdomain and the game 429 * starts anew. 430 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 431 * 432 * It seems possible that there are still scenarios with CSA or real 433 * bandwidth changes where a this could happen, but those cases are 434 * less common and wouldn't completely prevent using the AP. 435 */ 436 if (tracking && 437 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 438 return ret; 439 440 /* don't print the message below for VHT mismatch if VHT is disabled */ 441 if (ret & IEEE80211_CONN_DISABLE_VHT) 442 vht_chandef = *chandef; 443 444 /* 445 * Ignore the DISABLED flag when we're already connected and only 446 * tracking the APs beacon for bandwidth changes - otherwise we 447 * might get disconnected here if we connect to an AP, update our 448 * regulatory information based on the AP's country IE and the 449 * information we have is wrong/outdated and disables the channel 450 * that we're actually using for the connection to the AP. 451 */ 452 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 453 tracking ? 0 : 454 IEEE80211_CHAN_DISABLED)) { 455 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 456 ret = IEEE80211_CONN_DISABLE_HT | 457 IEEE80211_CONN_DISABLE_VHT | 458 IEEE80211_CONN_DISABLE_HE | 459 IEEE80211_CONN_DISABLE_EHT; 460 break; 461 } 462 463 ret |= ieee80211_chandef_downgrade(chandef); 464 } 465 466 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 467 IEEE80211_CHAN_NO_HE)) 468 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 469 470 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 471 IEEE80211_CHAN_NO_EHT)) 472 ret |= IEEE80211_CONN_DISABLE_EHT; 473 474 if (chandef->width != vht_chandef.width && !tracking) 475 sdata_info(sdata, 476 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 477 478 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 479 return ret; 480 } 481 ieee80211_config_bw(struct ieee80211_link_data * link,const struct ieee80211_ht_cap * ht_cap,const struct ieee80211_vht_cap * vht_cap,const struct ieee80211_ht_operation * ht_oper,const struct ieee80211_vht_operation * vht_oper,const struct ieee80211_he_operation * he_oper,const struct ieee80211_eht_operation * eht_oper,const struct ieee80211_s1g_oper_ie * s1g_oper,const u8 * bssid,u64 * changed)482 static int ieee80211_config_bw(struct ieee80211_link_data *link, 483 const struct ieee80211_ht_cap *ht_cap, 484 const struct ieee80211_vht_cap *vht_cap, 485 const struct ieee80211_ht_operation *ht_oper, 486 const struct ieee80211_vht_operation *vht_oper, 487 const struct ieee80211_he_operation *he_oper, 488 const struct ieee80211_eht_operation *eht_oper, 489 const struct ieee80211_s1g_oper_ie *s1g_oper, 490 const u8 *bssid, u64 *changed) 491 { 492 struct ieee80211_sub_if_data *sdata = link->sdata; 493 struct ieee80211_local *local = sdata->local; 494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 495 struct ieee80211_channel *chan = link->conf->chandef.chan; 496 struct ieee80211_supported_band *sband = 497 local->hw.wiphy->bands[chan->band]; 498 struct cfg80211_chan_def chandef; 499 u16 ht_opmode; 500 ieee80211_conn_flags_t flags; 501 u32 vht_cap_info = 0; 502 int ret; 503 504 /* if HT was/is disabled, don't track any bandwidth changes */ 505 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 506 return 0; 507 508 /* don't check VHT if we associated as non-VHT station */ 509 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 510 vht_oper = NULL; 511 512 /* don't check HE if we associated as non-HE station */ 513 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 514 !ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 515 he_oper = NULL; 516 eht_oper = NULL; 517 } 518 519 /* don't check EHT if we associated as non-EHT station */ 520 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 521 !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) 522 eht_oper = NULL; 523 524 /* 525 * if bss configuration changed store the new one - 526 * this may be applicable even if channel is identical 527 */ 528 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 529 if (link->conf->ht_operation_mode != ht_opmode) { 530 *changed |= BSS_CHANGED_HT; 531 link->conf->ht_operation_mode = ht_opmode; 532 } 533 534 if (vht_cap) 535 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 536 537 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 538 flags = ieee80211_determine_chantype(sdata, link, 539 link->u.mgd.conn_flags, 540 sband, chan, vht_cap_info, 541 ht_oper, vht_oper, 542 he_oper, eht_oper, 543 s1g_oper, &chandef, true); 544 545 /* 546 * Downgrade the new channel if we associated with restricted 547 * capabilities. For example, if we associated as a 20 MHz STA 548 * to a 40 MHz AP (due to regulatory, capabilities or config 549 * reasons) then switching to a 40 MHz channel now won't do us 550 * any good -- we couldn't use it with the AP. 551 */ 552 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 553 chandef.width == NL80211_CHAN_WIDTH_80P80) 554 flags |= ieee80211_chandef_downgrade(&chandef); 555 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 556 chandef.width == NL80211_CHAN_WIDTH_160) 557 flags |= ieee80211_chandef_downgrade(&chandef); 558 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 559 chandef.width > NL80211_CHAN_WIDTH_20) 560 flags |= ieee80211_chandef_downgrade(&chandef); 561 562 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 563 return 0; 564 565 link_info(link, 566 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 567 link->u.mgd.bssid, chandef.chan->center_freq, 568 chandef.chan->freq_offset, chandef.width, 569 chandef.center_freq1, chandef.freq1_offset, 570 chandef.center_freq2); 571 572 if (flags != (link->u.mgd.conn_flags & 573 (IEEE80211_CONN_DISABLE_HT | 574 IEEE80211_CONN_DISABLE_VHT | 575 IEEE80211_CONN_DISABLE_HE | 576 IEEE80211_CONN_DISABLE_EHT | 577 IEEE80211_CONN_DISABLE_40MHZ | 578 IEEE80211_CONN_DISABLE_80P80MHZ | 579 IEEE80211_CONN_DISABLE_160MHZ | 580 IEEE80211_CONN_DISABLE_320MHZ)) || 581 !cfg80211_chandef_valid(&chandef)) { 582 sdata_info(sdata, 583 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 584 link->u.mgd.bssid, flags, ifmgd->flags); 585 return -EINVAL; 586 } 587 588 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 589 590 if (ret) { 591 sdata_info(sdata, 592 "AP %pM changed bandwidth to incompatible one - disconnect\n", 593 link->u.mgd.bssid); 594 return ret; 595 } 596 597 return 0; 598 } 599 600 /* frame sending functions */ 601 ieee80211_add_ht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u8 ap_ht_param,struct ieee80211_supported_band * sband,struct ieee80211_channel * channel,enum ieee80211_smps_mode smps,ieee80211_conn_flags_t conn_flags)602 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 603 struct sk_buff *skb, u8 ap_ht_param, 604 struct ieee80211_supported_band *sband, 605 struct ieee80211_channel *channel, 606 enum ieee80211_smps_mode smps, 607 ieee80211_conn_flags_t conn_flags) 608 { 609 u8 *pos; 610 u32 flags = channel->flags; 611 u16 cap; 612 struct ieee80211_sta_ht_cap ht_cap; 613 614 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 615 616 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 617 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 618 619 /* determine capability flags */ 620 cap = ht_cap.cap; 621 622 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 623 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 624 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 625 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 626 cap &= ~IEEE80211_HT_CAP_SGI_40; 627 } 628 break; 629 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 630 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 631 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 632 cap &= ~IEEE80211_HT_CAP_SGI_40; 633 } 634 break; 635 } 636 637 /* 638 * If 40 MHz was disabled associate as though we weren't 639 * capable of 40 MHz -- some broken APs will never fall 640 * back to trying to transmit in 20 MHz. 641 */ 642 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 643 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 644 cap &= ~IEEE80211_HT_CAP_SGI_40; 645 } 646 647 /* set SM PS mode properly */ 648 cap &= ~IEEE80211_HT_CAP_SM_PS; 649 switch (smps) { 650 case IEEE80211_SMPS_AUTOMATIC: 651 case IEEE80211_SMPS_NUM_MODES: 652 WARN_ON(1); 653 fallthrough; 654 case IEEE80211_SMPS_OFF: 655 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 656 IEEE80211_HT_CAP_SM_PS_SHIFT; 657 break; 658 case IEEE80211_SMPS_STATIC: 659 cap |= WLAN_HT_CAP_SM_PS_STATIC << 660 IEEE80211_HT_CAP_SM_PS_SHIFT; 661 break; 662 case IEEE80211_SMPS_DYNAMIC: 663 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 664 IEEE80211_HT_CAP_SM_PS_SHIFT; 665 break; 666 } 667 668 /* reserve and fill IE */ 669 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 670 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 671 } 672 673 /* This function determines vht capability flags for the association 674 * and builds the IE. 675 * Note - the function returns true to own the MU-MIMO capability 676 */ ieee80211_add_vht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband,struct ieee80211_vht_cap * ap_vht_cap,ieee80211_conn_flags_t conn_flags)677 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 678 struct sk_buff *skb, 679 struct ieee80211_supported_band *sband, 680 struct ieee80211_vht_cap *ap_vht_cap, 681 ieee80211_conn_flags_t conn_flags) 682 { 683 struct ieee80211_local *local = sdata->local; 684 u8 *pos; 685 u32 cap; 686 struct ieee80211_sta_vht_cap vht_cap; 687 u32 mask, ap_bf_sts, our_bf_sts; 688 bool mu_mimo_owner = false; 689 690 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 691 692 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 693 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 694 695 /* determine capability flags */ 696 cap = vht_cap.cap; 697 698 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 699 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 700 701 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 702 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 703 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 704 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 705 } 706 707 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 708 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 709 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 710 } 711 712 /* 713 * Some APs apparently get confused if our capabilities are better 714 * than theirs, so restrict what we advertise in the assoc request. 715 */ 716 if (!(ap_vht_cap->vht_cap_info & 717 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 718 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 719 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 720 else if (!(ap_vht_cap->vht_cap_info & 721 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 722 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 723 724 /* 725 * If some other vif is using the MU-MIMO capability we cannot associate 726 * using MU-MIMO - this will lead to contradictions in the group-id 727 * mechanism. 728 * Ownership is defined since association request, in order to avoid 729 * simultaneous associations with MU-MIMO. 730 */ 731 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 732 bool disable_mu_mimo = false; 733 struct ieee80211_sub_if_data *other; 734 735 list_for_each_entry_rcu(other, &local->interfaces, list) { 736 if (other->vif.bss_conf.mu_mimo_owner) { 737 disable_mu_mimo = true; 738 break; 739 } 740 } 741 if (disable_mu_mimo) 742 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 743 else 744 mu_mimo_owner = true; 745 } 746 747 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 748 749 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 750 our_bf_sts = cap & mask; 751 752 if (ap_bf_sts < our_bf_sts) { 753 cap &= ~mask; 754 cap |= ap_bf_sts; 755 } 756 757 /* reserve and fill IE */ 758 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 759 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 760 761 return mu_mimo_owner; 762 } 763 764 /* This function determines HE capability flags for the association 765 * and builds the IE. 766 */ ieee80211_add_he_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband,enum ieee80211_smps_mode smps_mode,ieee80211_conn_flags_t conn_flags)767 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 768 struct sk_buff *skb, 769 struct ieee80211_supported_band *sband, 770 enum ieee80211_smps_mode smps_mode, 771 ieee80211_conn_flags_t conn_flags) 772 { 773 u8 *pos, *pre_he_pos; 774 const struct ieee80211_sta_he_cap *he_cap; 775 u8 he_cap_size; 776 777 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 778 if (WARN_ON(!he_cap)) 779 return; 780 781 /* get a max size estimate */ 782 he_cap_size = 783 2 + 1 + sizeof(he_cap->he_cap_elem) + 784 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 785 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 786 he_cap->he_cap_elem.phy_cap_info); 787 pos = skb_put(skb, he_cap_size); 788 pre_he_pos = pos; 789 pos = ieee80211_ie_build_he_cap(conn_flags, 790 pos, he_cap, pos + he_cap_size); 791 /* trim excess if any */ 792 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 793 794 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 795 } 796 ieee80211_add_eht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband)797 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 798 struct sk_buff *skb, 799 struct ieee80211_supported_band *sband) 800 { 801 u8 *pos; 802 const struct ieee80211_sta_he_cap *he_cap; 803 const struct ieee80211_sta_eht_cap *eht_cap; 804 u8 eht_cap_size; 805 806 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 807 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 808 809 /* 810 * EHT capabilities element is only added if the HE capabilities element 811 * was added so assume that 'he_cap' is valid and don't check it. 812 */ 813 if (WARN_ON(!he_cap || !eht_cap)) 814 return; 815 816 eht_cap_size = 817 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 818 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 819 &eht_cap->eht_cap_elem, 820 false) + 821 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 822 eht_cap->eht_cap_elem.phy_cap_info); 823 pos = skb_put(skb, eht_cap_size); 824 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 825 false); 826 } 827 ieee80211_assoc_add_rates(struct sk_buff * skb,enum nl80211_chan_width width,struct ieee80211_supported_band * sband,struct ieee80211_mgd_assoc_data * assoc_data)828 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 829 enum nl80211_chan_width width, 830 struct ieee80211_supported_band *sband, 831 struct ieee80211_mgd_assoc_data *assoc_data) 832 { 833 unsigned int shift = ieee80211_chanwidth_get_shift(width); 834 unsigned int rates_len, supp_rates_len; 835 u32 rates = 0; 836 int i, count; 837 u8 *pos; 838 839 if (assoc_data->supp_rates_len) { 840 /* 841 * Get all rates supported by the device and the AP as 842 * some APs don't like getting a superset of their rates 843 * in the association request (e.g. D-Link DAP 1353 in 844 * b-only mode)... 845 */ 846 rates_len = ieee80211_parse_bitrates(width, sband, 847 assoc_data->supp_rates, 848 assoc_data->supp_rates_len, 849 &rates); 850 } else { 851 /* 852 * In case AP not provide any supported rates information 853 * before association, we send information element(s) with 854 * all rates that we support. 855 */ 856 rates_len = sband->n_bitrates; 857 for (i = 0; i < sband->n_bitrates; i++) 858 rates |= BIT(i); 859 } 860 861 supp_rates_len = rates_len; 862 if (supp_rates_len > 8) 863 supp_rates_len = 8; 864 865 pos = skb_put(skb, supp_rates_len + 2); 866 *pos++ = WLAN_EID_SUPP_RATES; 867 *pos++ = supp_rates_len; 868 869 count = 0; 870 for (i = 0; i < sband->n_bitrates; i++) { 871 if (BIT(i) & rates) { 872 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 873 5 * (1 << shift)); 874 *pos++ = (u8)rate; 875 if (++count == 8) 876 break; 877 } 878 } 879 880 if (rates_len > count) { 881 pos = skb_put(skb, rates_len - count + 2); 882 *pos++ = WLAN_EID_EXT_SUPP_RATES; 883 *pos++ = rates_len - count; 884 885 for (i++; i < sband->n_bitrates; i++) { 886 if (BIT(i) & rates) { 887 int rate; 888 889 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 890 5 * (1 << shift)); 891 *pos++ = (u8)rate; 892 } 893 } 894 } 895 } 896 ieee80211_add_before_ht_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)897 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 898 const u8 *elems, 899 size_t elems_len, 900 size_t offset) 901 { 902 size_t noffset; 903 904 static const u8 before_ht[] = { 905 WLAN_EID_SSID, 906 WLAN_EID_SUPP_RATES, 907 WLAN_EID_EXT_SUPP_RATES, 908 WLAN_EID_PWR_CAPABILITY, 909 WLAN_EID_SUPPORTED_CHANNELS, 910 WLAN_EID_RSN, 911 WLAN_EID_QOS_CAPA, 912 WLAN_EID_RRM_ENABLED_CAPABILITIES, 913 WLAN_EID_MOBILITY_DOMAIN, 914 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 915 WLAN_EID_RIC_DATA, /* reassoc only */ 916 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 917 }; 918 static const u8 after_ric[] = { 919 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 920 WLAN_EID_HT_CAPABILITY, 921 WLAN_EID_BSS_COEX_2040, 922 /* luckily this is almost always there */ 923 WLAN_EID_EXT_CAPABILITY, 924 WLAN_EID_QOS_TRAFFIC_CAPA, 925 WLAN_EID_TIM_BCAST_REQ, 926 WLAN_EID_INTERWORKING, 927 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 928 WLAN_EID_VHT_CAPABILITY, 929 WLAN_EID_OPMODE_NOTIF, 930 }; 931 932 if (!elems_len) 933 return offset; 934 935 noffset = ieee80211_ie_split_ric(elems, elems_len, 936 before_ht, 937 ARRAY_SIZE(before_ht), 938 after_ric, 939 ARRAY_SIZE(after_ric), 940 offset); 941 skb_put_data(skb, elems + offset, noffset - offset); 942 943 return noffset; 944 } 945 ieee80211_add_before_vht_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)946 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 947 const u8 *elems, 948 size_t elems_len, 949 size_t offset) 950 { 951 static const u8 before_vht[] = { 952 /* 953 * no need to list the ones split off before HT 954 * or generated here 955 */ 956 WLAN_EID_BSS_COEX_2040, 957 WLAN_EID_EXT_CAPABILITY, 958 WLAN_EID_QOS_TRAFFIC_CAPA, 959 WLAN_EID_TIM_BCAST_REQ, 960 WLAN_EID_INTERWORKING, 961 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 962 }; 963 size_t noffset; 964 965 if (!elems_len) 966 return offset; 967 968 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 969 noffset = ieee80211_ie_split(elems, elems_len, 970 before_vht, ARRAY_SIZE(before_vht), 971 offset); 972 skb_put_data(skb, elems + offset, noffset - offset); 973 974 return noffset; 975 } 976 ieee80211_add_before_he_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)977 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 978 const u8 *elems, 979 size_t elems_len, 980 size_t offset) 981 { 982 static const u8 before_he[] = { 983 /* 984 * no need to list the ones split off before VHT 985 * or generated here 986 */ 987 WLAN_EID_OPMODE_NOTIF, 988 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 989 /* 11ai elements */ 990 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 991 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 992 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 993 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 994 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 995 /* TODO: add 11ah/11aj/11ak elements */ 996 }; 997 size_t noffset; 998 999 if (!elems_len) 1000 return offset; 1001 1002 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1003 noffset = ieee80211_ie_split(elems, elems_len, 1004 before_he, ARRAY_SIZE(before_he), 1005 offset); 1006 skb_put_data(skb, elems + offset, noffset - offset); 1007 1008 return noffset; 1009 } 1010 1011 #define PRESENT_ELEMS_MAX 8 1012 #define PRESENT_ELEM_EXT_OFFS 0x100 1013 1014 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1015 struct sk_buff *skb, u16 capab, 1016 const struct element *ext_capa, 1017 const u16 *present_elems); 1018 ieee80211_assoc_link_elems(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u16 * capab,const struct element * ext_capa,const u8 * extra_elems,size_t extra_elems_len,unsigned int link_id,struct ieee80211_link_data * link,u16 * present_elems)1019 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1020 struct sk_buff *skb, u16 *capab, 1021 const struct element *ext_capa, 1022 const u8 *extra_elems, 1023 size_t extra_elems_len, 1024 unsigned int link_id, 1025 struct ieee80211_link_data *link, 1026 u16 *present_elems) 1027 { 1028 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1030 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1031 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1032 struct ieee80211_channel *chan = cbss->channel; 1033 const struct ieee80211_sband_iftype_data *iftd; 1034 struct ieee80211_local *local = sdata->local; 1035 struct ieee80211_supported_band *sband; 1036 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1037 struct ieee80211_chanctx_conf *chanctx_conf; 1038 enum ieee80211_smps_mode smps_mode; 1039 u16 orig_capab = *capab; 1040 size_t offset = 0; 1041 int present_elems_len = 0; 1042 u8 *pos; 1043 int i; 1044 1045 #define ADD_PRESENT_ELEM(id) do { \ 1046 /* need a last for termination - we use 0 == SSID */ \ 1047 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1048 present_elems[present_elems_len++] = (id); \ 1049 } while (0) 1050 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1051 1052 if (link) 1053 smps_mode = link->smps_mode; 1054 else if (sdata->u.mgd.powersave) 1055 smps_mode = IEEE80211_SMPS_DYNAMIC; 1056 else 1057 smps_mode = IEEE80211_SMPS_OFF; 1058 1059 if (link) { 1060 /* 1061 * 5/10 MHz scenarios are only viable without MLO, in which 1062 * case this pointer should be used ... All of this is a bit 1063 * unclear though, not sure this even works at all. 1064 */ 1065 rcu_read_lock(); 1066 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1067 if (chanctx_conf) 1068 width = chanctx_conf->def.width; 1069 rcu_read_unlock(); 1070 } 1071 1072 sband = local->hw.wiphy->bands[chan->band]; 1073 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1074 1075 if (sband->band == NL80211_BAND_2GHZ) { 1076 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1077 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1078 } 1079 1080 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1081 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1082 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1083 1084 if (sband->band != NL80211_BAND_S1GHZ) 1085 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1086 1087 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1088 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1089 struct cfg80211_chan_def chandef = { 1090 .width = width, 1091 .chan = chan, 1092 }; 1093 1094 pos = skb_put(skb, 4); 1095 *pos++ = WLAN_EID_PWR_CAPABILITY; 1096 *pos++ = 2; 1097 *pos++ = 0; /* min tx power */ 1098 /* max tx power */ 1099 *pos++ = ieee80211_chandef_max_power(&chandef); 1100 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1101 } 1102 1103 /* 1104 * Per spec, we shouldn't include the list of channels if we advertise 1105 * support for extended channel switching, but we've always done that; 1106 * (for now?) apply this restriction only on the (new) 6 GHz band. 1107 */ 1108 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1109 (sband->band != NL80211_BAND_6GHZ || 1110 !ext_capa || ext_capa->datalen < 1 || 1111 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1112 /* TODO: get this in reg domain format */ 1113 pos = skb_put(skb, 2 * sband->n_channels + 2); 1114 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1115 *pos++ = 2 * sband->n_channels; 1116 for (i = 0; i < sband->n_channels; i++) { 1117 int cf = sband->channels[i].center_freq; 1118 1119 *pos++ = ieee80211_frequency_to_channel(cf); 1120 *pos++ = 1; /* one channel in the subband*/ 1121 } 1122 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1123 } 1124 1125 /* if present, add any custom IEs that go before HT */ 1126 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1127 extra_elems_len, 1128 offset); 1129 1130 if (sband->band != NL80211_BAND_6GHZ && 1131 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1132 ieee80211_add_ht_ie(sdata, skb, 1133 assoc_data->link[link_id].ap_ht_param, 1134 sband, chan, smps_mode, 1135 assoc_data->link[link_id].conn_flags); 1136 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1137 } 1138 1139 /* if present, add any custom IEs that go before VHT */ 1140 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1141 extra_elems_len, 1142 offset); 1143 1144 if (sband->band != NL80211_BAND_6GHZ && 1145 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1146 bool mu_mimo_owner = 1147 ieee80211_add_vht_ie(sdata, skb, sband, 1148 &assoc_data->link[link_id].ap_vht_cap, 1149 assoc_data->link[link_id].conn_flags); 1150 1151 if (link) 1152 link->conf->mu_mimo_owner = mu_mimo_owner; 1153 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1154 } 1155 1156 /* 1157 * If AP doesn't support HT, mark HE and EHT as disabled. 1158 * If on the 5GHz band, make sure it supports VHT. 1159 */ 1160 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1161 (sband->band == NL80211_BAND_5GHZ && 1162 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1163 assoc_data->link[link_id].conn_flags |= 1164 IEEE80211_CONN_DISABLE_HE | 1165 IEEE80211_CONN_DISABLE_EHT; 1166 1167 /* if present, add any custom IEs that go before HE */ 1168 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1169 extra_elems_len, 1170 offset); 1171 1172 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1173 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1174 assoc_data->link[link_id].conn_flags); 1175 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1176 } 1177 1178 /* 1179 * careful - need to know about all the present elems before 1180 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1181 * we're going to put it after the ML element 1182 */ 1183 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1184 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1185 1186 if (link_id == assoc_data->assoc_link_id) 1187 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1188 present_elems); 1189 1190 /* crash if somebody gets it wrong */ 1191 present_elems = NULL; 1192 1193 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1194 ieee80211_add_eht_ie(sdata, skb, sband); 1195 1196 if (sband->band == NL80211_BAND_S1GHZ) { 1197 ieee80211_add_aid_request_ie(sdata, skb); 1198 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1199 } 1200 1201 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1202 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1203 1204 if (link) 1205 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1206 1207 return offset; 1208 } 1209 ieee80211_add_non_inheritance_elem(struct sk_buff * skb,const u16 * outer,const u16 * inner)1210 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1211 const u16 *outer, 1212 const u16 *inner) 1213 { 1214 unsigned int skb_len = skb->len; 1215 bool at_extension = false; 1216 bool added = false; 1217 int i, j; 1218 u8 *len, *list_len = NULL; 1219 1220 skb_put_u8(skb, WLAN_EID_EXTENSION); 1221 len = skb_put(skb, 1); 1222 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1223 1224 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1225 u16 elem = outer[i]; 1226 bool have_inner = false; 1227 1228 /* should at least be sorted in the sense of normal -> ext */ 1229 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1230 1231 /* switch to extension list */ 1232 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1233 at_extension = true; 1234 if (!list_len) 1235 skb_put_u8(skb, 0); 1236 list_len = NULL; 1237 } 1238 1239 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1240 if (elem == inner[j]) { 1241 have_inner = true; 1242 break; 1243 } 1244 } 1245 1246 if (have_inner) 1247 continue; 1248 1249 if (!list_len) { 1250 list_len = skb_put(skb, 1); 1251 *list_len = 0; 1252 } 1253 *list_len += 1; 1254 skb_put_u8(skb, (u8)elem); 1255 added = true; 1256 } 1257 1258 /* if we added a list but no extension list, make a zero-len one */ 1259 if (added && (!at_extension || !list_len)) 1260 skb_put_u8(skb, 0); 1261 1262 /* if nothing added remove extension element completely */ 1263 if (!added) 1264 skb_trim(skb, skb_len); 1265 else 1266 *len = skb->len - skb_len - 2; 1267 } 1268 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u16 capab,const struct element * ext_capa,const u16 * outer_present_elems)1269 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1270 struct sk_buff *skb, u16 capab, 1271 const struct element *ext_capa, 1272 const u16 *outer_present_elems) 1273 { 1274 struct ieee80211_local *local = sdata->local; 1275 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1276 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1277 struct ieee80211_multi_link_elem *ml_elem; 1278 struct ieee80211_mle_basic_common_info *common; 1279 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1280 __le16 eml_capa = 0, mld_capa_ops = 0; 1281 unsigned int link_id; 1282 u8 *ml_elem_len; 1283 void *capab_pos; 1284 1285 if (!ieee80211_vif_is_mld(&sdata->vif)) 1286 return; 1287 1288 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1289 ieee80211_vif_type_p2p(&sdata->vif)); 1290 if (ift_ext_capa) { 1291 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1292 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1293 } 1294 1295 skb_put_u8(skb, WLAN_EID_EXTENSION); 1296 ml_elem_len = skb_put(skb, 1); 1297 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1298 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1299 ml_elem->control = 1300 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1301 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1302 common = skb_put(skb, sizeof(*common)); 1303 common->len = sizeof(*common) + 1304 2; /* MLD capa/ops */ 1305 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1306 1307 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1308 if (eml_capa & 1309 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1310 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1311 common->len += 2; /* EML capabilities */ 1312 ml_elem->control |= 1313 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1314 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1315 } 1316 /* need indication from userspace to support this */ 1317 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1318 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1319 1320 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1321 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1322 const u8 *extra_elems; 1323 size_t extra_elems_len; 1324 size_t extra_used; 1325 u8 *subelem_len = NULL; 1326 __le16 ctrl; 1327 1328 if (!assoc_data->link[link_id].bss || 1329 link_id == assoc_data->assoc_link_id) 1330 continue; 1331 1332 extra_elems = assoc_data->link[link_id].elems; 1333 extra_elems_len = assoc_data->link[link_id].elems_len; 1334 1335 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1336 subelem_len = skb_put(skb, 1); 1337 1338 ctrl = cpu_to_le16(link_id | 1339 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1340 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1341 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1342 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1343 skb_put_data(skb, assoc_data->link[link_id].addr, 1344 ETH_ALEN); 1345 /* 1346 * Now add the contents of the (re)association request, 1347 * but the "listen interval" and "current AP address" 1348 * (if applicable) are skipped. So we only have 1349 * the capability field (remember the position and fill 1350 * later), followed by the elements added below by 1351 * calling ieee80211_assoc_link_elems(). 1352 */ 1353 capab_pos = skb_put(skb, 2); 1354 1355 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1356 ext_capa, 1357 extra_elems, 1358 extra_elems_len, 1359 link_id, NULL, 1360 link_present_elems); 1361 if (extra_elems) 1362 skb_put_data(skb, extra_elems + extra_used, 1363 extra_elems_len - extra_used); 1364 1365 put_unaligned_le16(capab, capab_pos); 1366 1367 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1368 link_present_elems); 1369 1370 ieee80211_fragment_element(skb, subelem_len, 1371 IEEE80211_MLE_SUBELEM_FRAGMENT); 1372 } 1373 1374 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1375 } 1376 ieee80211_send_assoc(struct ieee80211_sub_if_data * sdata)1377 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1378 { 1379 struct ieee80211_local *local = sdata->local; 1380 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1381 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1382 struct ieee80211_link_data *link; 1383 struct sk_buff *skb; 1384 struct ieee80211_mgmt *mgmt; 1385 u8 *pos, qos_info, *ie_start; 1386 size_t offset, noffset; 1387 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1388 __le16 listen_int; 1389 struct element *ext_capa = NULL; 1390 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1391 struct ieee80211_prep_tx_info info = {}; 1392 unsigned int link_id, n_links = 0; 1393 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1394 void *capab_pos; 1395 size_t size; 1396 int ret; 1397 1398 /* we know it's writable, cast away the const */ 1399 if (assoc_data->ie_len) 1400 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1401 assoc_data->ie, 1402 assoc_data->ie_len); 1403 1404 sdata_assert_lock(sdata); 1405 1406 size = local->hw.extra_tx_headroom + 1407 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1408 2 + assoc_data->ssid_len + /* SSID */ 1409 assoc_data->ie_len + /* extra IEs */ 1410 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1411 9; /* WMM */ 1412 1413 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1414 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1415 const struct ieee80211_sband_iftype_data *iftd; 1416 struct ieee80211_supported_band *sband; 1417 1418 if (!cbss) 1419 continue; 1420 1421 sband = local->hw.wiphy->bands[cbss->channel->band]; 1422 1423 n_links++; 1424 /* add STA profile elements length */ 1425 size += assoc_data->link[link_id].elems_len; 1426 /* and supported rates length */ 1427 size += 4 + sband->n_bitrates; 1428 /* supported channels */ 1429 size += 2 + 2 * sband->n_channels; 1430 1431 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1432 if (iftd) 1433 size += iftd->vendor_elems.len; 1434 1435 /* power capability */ 1436 size += 4; 1437 1438 /* HT, VHT, HE, EHT */ 1439 size += 2 + sizeof(struct ieee80211_ht_cap); 1440 size += 2 + sizeof(struct ieee80211_vht_cap); 1441 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1442 sizeof(struct ieee80211_he_mcs_nss_supp) + 1443 IEEE80211_HE_PPE_THRES_MAX_LEN; 1444 1445 if (sband->band == NL80211_BAND_6GHZ) 1446 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1447 1448 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1449 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1450 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1451 1452 /* non-inheritance element */ 1453 size += 2 + 2 + PRESENT_ELEMS_MAX; 1454 1455 /* should be the same across all BSSes */ 1456 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1457 capab |= WLAN_CAPABILITY_PRIVACY; 1458 } 1459 1460 if (ieee80211_vif_is_mld(&sdata->vif)) { 1461 /* consider the multi-link element with STA profile */ 1462 size += sizeof(struct ieee80211_multi_link_elem); 1463 /* max common info field in basic multi-link element */ 1464 size += sizeof(struct ieee80211_mle_basic_common_info) + 1465 2 + /* capa & op */ 1466 2; /* EML capa */ 1467 1468 /* 1469 * The capability elements were already considered above; 1470 * note this over-estimates a bit because there's no 1471 * STA profile for the assoc link. 1472 */ 1473 size += (n_links - 1) * 1474 (1 + 1 + /* subelement ID/length */ 1475 2 + /* STA control */ 1476 1 + ETH_ALEN + 2 /* STA Info field */); 1477 } 1478 1479 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1480 if (WARN_ON(!link)) 1481 return -EINVAL; 1482 1483 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1484 return -EINVAL; 1485 1486 skb = alloc_skb(size, GFP_KERNEL); 1487 if (!skb) 1488 return -ENOMEM; 1489 1490 skb_reserve(skb, local->hw.extra_tx_headroom); 1491 1492 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1493 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1494 1495 /* Set MBSSID support for HE AP if needed */ 1496 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1497 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1498 ext_capa && ext_capa->datalen >= 3) 1499 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1500 1501 mgmt = skb_put_zero(skb, 24); 1502 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1503 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1504 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1505 1506 listen_int = cpu_to_le16(assoc_data->s1g ? 1507 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1508 local->hw.conf.listen_interval); 1509 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1510 skb_put(skb, 10); 1511 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1512 IEEE80211_STYPE_REASSOC_REQ); 1513 capab_pos = &mgmt->u.reassoc_req.capab_info; 1514 mgmt->u.reassoc_req.listen_interval = listen_int; 1515 memcpy(mgmt->u.reassoc_req.current_ap, 1516 assoc_data->prev_ap_addr, ETH_ALEN); 1517 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1518 } else { 1519 skb_put(skb, 4); 1520 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1521 IEEE80211_STYPE_ASSOC_REQ); 1522 capab_pos = &mgmt->u.assoc_req.capab_info; 1523 mgmt->u.assoc_req.listen_interval = listen_int; 1524 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1525 } 1526 1527 /* SSID */ 1528 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1529 ie_start = pos; 1530 *pos++ = WLAN_EID_SSID; 1531 *pos++ = assoc_data->ssid_len; 1532 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1533 1534 /* add the elements for the assoc (main) link */ 1535 link_capab = capab; 1536 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1537 ext_capa, 1538 assoc_data->ie, 1539 assoc_data->ie_len, 1540 assoc_data->assoc_link_id, link, 1541 present_elems); 1542 put_unaligned_le16(link_capab, capab_pos); 1543 1544 /* if present, add any custom non-vendor IEs */ 1545 if (assoc_data->ie_len) { 1546 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1547 assoc_data->ie_len, 1548 offset); 1549 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1550 offset = noffset; 1551 } 1552 1553 if (assoc_data->wmm) { 1554 if (assoc_data->uapsd) { 1555 qos_info = ifmgd->uapsd_queues; 1556 qos_info |= (ifmgd->uapsd_max_sp_len << 1557 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1558 } else { 1559 qos_info = 0; 1560 } 1561 1562 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1563 } 1564 1565 /* add any remaining custom (i.e. vendor specific here) IEs */ 1566 if (assoc_data->ie_len) { 1567 noffset = assoc_data->ie_len; 1568 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1569 } 1570 1571 if (assoc_data->fils_kek_len) { 1572 ret = fils_encrypt_assoc_req(skb, assoc_data); 1573 if (ret < 0) { 1574 dev_kfree_skb(skb); 1575 return ret; 1576 } 1577 } 1578 1579 pos = skb_tail_pointer(skb); 1580 kfree(ifmgd->assoc_req_ies); 1581 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1582 if (!ifmgd->assoc_req_ies) { 1583 dev_kfree_skb(skb); 1584 return -ENOMEM; 1585 } 1586 1587 ifmgd->assoc_req_ies_len = pos - ie_start; 1588 1589 drv_mgd_prepare_tx(local, sdata, &info); 1590 1591 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1592 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1593 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1594 IEEE80211_TX_INTFL_MLME_CONN_TX; 1595 ieee80211_tx_skb(sdata, skb); 1596 1597 return 0; 1598 } 1599 ieee80211_send_pspoll(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1600 void ieee80211_send_pspoll(struct ieee80211_local *local, 1601 struct ieee80211_sub_if_data *sdata) 1602 { 1603 struct ieee80211_pspoll *pspoll; 1604 struct sk_buff *skb; 1605 1606 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1607 if (!skb) 1608 return; 1609 1610 pspoll = (struct ieee80211_pspoll *) skb->data; 1611 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1612 1613 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1614 ieee80211_tx_skb(sdata, skb); 1615 } 1616 ieee80211_send_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,bool powersave)1617 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1618 struct ieee80211_sub_if_data *sdata, 1619 bool powersave) 1620 { 1621 struct sk_buff *skb; 1622 struct ieee80211_hdr_3addr *nullfunc; 1623 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1624 1625 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1626 !ieee80211_hw_check(&local->hw, 1627 DOESNT_SUPPORT_QOS_NDP)); 1628 if (!skb) 1629 return; 1630 1631 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1632 if (powersave) 1633 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1634 1635 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1636 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1637 1638 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1639 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1640 1641 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1642 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1643 1644 ieee80211_tx_skb(sdata, skb); 1645 } 1646 ieee80211_send_4addr_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1647 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1648 struct ieee80211_sub_if_data *sdata) 1649 { 1650 struct sk_buff *skb; 1651 struct ieee80211_hdr *nullfunc; 1652 __le16 fc; 1653 1654 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1655 return; 1656 1657 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1658 if (!skb) 1659 return; 1660 1661 skb_reserve(skb, local->hw.extra_tx_headroom); 1662 1663 nullfunc = skb_put_zero(skb, 30); 1664 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1665 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1666 nullfunc->frame_control = fc; 1667 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1668 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1669 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1670 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1671 1672 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1673 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1674 ieee80211_tx_skb(sdata, skb); 1675 } 1676 1677 /* spectrum management related things */ ieee80211_chswitch_work(struct wiphy * wiphy,struct wiphy_work * work)1678 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1679 struct wiphy_work *work) 1680 { 1681 struct ieee80211_link_data *link = 1682 container_of(work, struct ieee80211_link_data, 1683 u.mgd.chswitch_work.work); 1684 struct ieee80211_sub_if_data *sdata = link->sdata; 1685 struct ieee80211_local *local = sdata->local; 1686 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1687 int ret; 1688 1689 if (!ieee80211_sdata_running(sdata)) 1690 return; 1691 1692 sdata_lock(sdata); 1693 mutex_lock(&local->mtx); 1694 mutex_lock(&local->chanctx_mtx); 1695 1696 if (!ifmgd->associated) 1697 goto out; 1698 1699 if (!link->conf->csa_active) 1700 goto out; 1701 1702 /* 1703 * using reservation isn't immediate as it may be deferred until later 1704 * with multi-vif. once reservation is complete it will re-schedule the 1705 * work with no reserved_chanctx so verify chandef to check if it 1706 * completed successfully 1707 */ 1708 1709 if (link->reserved_chanctx) { 1710 /* 1711 * with multi-vif csa driver may call ieee80211_csa_finish() 1712 * many times while waiting for other interfaces to use their 1713 * reservations 1714 */ 1715 if (link->reserved_ready) 1716 goto out; 1717 1718 ret = ieee80211_link_use_reserved_context(link); 1719 if (ret) { 1720 sdata_info(sdata, 1721 "failed to use reserved channel context, disconnecting (err=%d)\n", 1722 ret); 1723 wiphy_work_queue(sdata->local->hw.wiphy, 1724 &ifmgd->csa_connection_drop_work); 1725 goto out; 1726 } 1727 1728 goto out; 1729 } 1730 1731 if (!cfg80211_chandef_identical(&link->conf->chandef, 1732 &link->csa_chandef)) { 1733 sdata_info(sdata, 1734 "failed to finalize channel switch, disconnecting\n"); 1735 wiphy_work_queue(sdata->local->hw.wiphy, 1736 &ifmgd->csa_connection_drop_work); 1737 goto out; 1738 } 1739 1740 link->u.mgd.csa_waiting_bcn = true; 1741 1742 ieee80211_sta_reset_beacon_monitor(sdata); 1743 ieee80211_sta_reset_conn_monitor(sdata); 1744 1745 out: 1746 mutex_unlock(&local->chanctx_mtx); 1747 mutex_unlock(&local->mtx); 1748 sdata_unlock(sdata); 1749 } 1750 ieee80211_chswitch_post_beacon(struct ieee80211_link_data * link)1751 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1752 { 1753 struct ieee80211_sub_if_data *sdata = link->sdata; 1754 struct ieee80211_local *local = sdata->local; 1755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1756 int ret; 1757 1758 sdata_assert_lock(sdata); 1759 1760 WARN_ON(!link->conf->csa_active); 1761 1762 if (link->csa_block_tx) { 1763 ieee80211_wake_vif_queues(local, sdata, 1764 IEEE80211_QUEUE_STOP_REASON_CSA); 1765 link->csa_block_tx = false; 1766 } 1767 1768 link->conf->csa_active = false; 1769 link->u.mgd.csa_waiting_bcn = false; 1770 /* 1771 * If the CSA IE is still present on the beacon after the switch, 1772 * we need to consider it as a new CSA (possibly to self). 1773 */ 1774 link->u.mgd.beacon_crc_valid = false; 1775 1776 ret = drv_post_channel_switch(sdata); 1777 if (ret) { 1778 sdata_info(sdata, 1779 "driver post channel switch failed, disconnecting\n"); 1780 wiphy_work_queue(sdata->local->hw.wiphy, 1781 &ifmgd->csa_connection_drop_work); 1782 return; 1783 } 1784 1785 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0, 0); 1786 } 1787 ieee80211_chswitch_done(struct ieee80211_vif * vif,bool success)1788 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1789 { 1790 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1792 1793 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 1794 success = false; 1795 1796 trace_api_chswitch_done(sdata, success); 1797 if (!success) { 1798 sdata_info(sdata, 1799 "driver channel switch failed, disconnecting\n"); 1800 wiphy_work_queue(sdata->local->hw.wiphy, 1801 &ifmgd->csa_connection_drop_work); 1802 } else { 1803 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1804 &sdata->deflink.u.mgd.chswitch_work, 1805 0); 1806 } 1807 } 1808 EXPORT_SYMBOL(ieee80211_chswitch_done); 1809 1810 static void ieee80211_sta_abort_chanswitch(struct ieee80211_link_data * link)1811 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1812 { 1813 struct ieee80211_sub_if_data *sdata = link->sdata; 1814 struct ieee80211_local *local = sdata->local; 1815 1816 if (!local->ops->abort_channel_switch) 1817 return; 1818 1819 mutex_lock(&local->mtx); 1820 1821 mutex_lock(&local->chanctx_mtx); 1822 ieee80211_link_unreserve_chanctx(link); 1823 mutex_unlock(&local->chanctx_mtx); 1824 1825 if (link->csa_block_tx) 1826 ieee80211_wake_vif_queues(local, sdata, 1827 IEEE80211_QUEUE_STOP_REASON_CSA); 1828 1829 link->csa_block_tx = false; 1830 link->conf->csa_active = false; 1831 1832 mutex_unlock(&local->mtx); 1833 1834 drv_abort_channel_switch(sdata); 1835 } 1836 1837 static void ieee80211_sta_process_chanswitch(struct ieee80211_link_data * link,u64 timestamp,u32 device_timestamp,struct ieee802_11_elems * elems,bool beacon)1838 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1839 u64 timestamp, u32 device_timestamp, 1840 struct ieee802_11_elems *elems, 1841 bool beacon) 1842 { 1843 struct ieee80211_sub_if_data *sdata = link->sdata; 1844 struct ieee80211_local *local = sdata->local; 1845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1846 struct cfg80211_bss *cbss = link->u.mgd.bss; 1847 struct ieee80211_chanctx_conf *conf; 1848 struct ieee80211_chanctx *chanctx; 1849 enum nl80211_band current_band; 1850 struct ieee80211_csa_ie csa_ie; 1851 struct ieee80211_channel_switch ch_switch; 1852 struct ieee80211_bss *bss; 1853 unsigned long timeout; 1854 int res; 1855 1856 sdata_assert_lock(sdata); 1857 1858 if (!cbss) 1859 return; 1860 1861 current_band = cbss->channel->band; 1862 bss = (void *)cbss->priv; 1863 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1864 bss->vht_cap_info, 1865 link->u.mgd.conn_flags, 1866 link->u.mgd.bssid, &csa_ie); 1867 1868 if (!res) { 1869 ch_switch.timestamp = timestamp; 1870 ch_switch.device_timestamp = device_timestamp; 1871 ch_switch.block_tx = csa_ie.mode; 1872 ch_switch.chandef = csa_ie.chandef; 1873 ch_switch.count = csa_ie.count; 1874 ch_switch.delay = csa_ie.max_switch_time; 1875 } 1876 1877 if (res < 0) 1878 goto lock_and_drop_connection; 1879 1880 if (beacon && link->conf->csa_active && 1881 !link->u.mgd.csa_waiting_bcn) { 1882 if (res) 1883 ieee80211_sta_abort_chanswitch(link); 1884 else 1885 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1886 return; 1887 } else if (link->conf->csa_active || res) { 1888 /* disregard subsequent announcements if already processing */ 1889 return; 1890 } 1891 1892 if (link->conf->chandef.chan->band != 1893 csa_ie.chandef.chan->band) { 1894 sdata_info(sdata, 1895 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1896 link->u.mgd.bssid, 1897 csa_ie.chandef.chan->center_freq, 1898 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1899 csa_ie.chandef.center_freq2); 1900 goto lock_and_drop_connection; 1901 } 1902 1903 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1904 IEEE80211_CHAN_DISABLED)) { 1905 sdata_info(sdata, 1906 "AP %pM switches to unsupported channel " 1907 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1908 "disconnecting\n", 1909 link->u.mgd.bssid, 1910 csa_ie.chandef.chan->center_freq, 1911 csa_ie.chandef.chan->freq_offset, 1912 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1913 csa_ie.chandef.freq1_offset, 1914 csa_ie.chandef.center_freq2); 1915 goto lock_and_drop_connection; 1916 } 1917 1918 if (cfg80211_chandef_identical(&csa_ie.chandef, 1919 &link->conf->chandef) && 1920 (!csa_ie.mode || !beacon)) { 1921 if (link->u.mgd.csa_ignored_same_chan) 1922 return; 1923 sdata_info(sdata, 1924 "AP %pM tries to chanswitch to same channel, ignore\n", 1925 link->u.mgd.bssid); 1926 link->u.mgd.csa_ignored_same_chan = true; 1927 return; 1928 } 1929 1930 /* 1931 * Drop all TDLS peers - either we disconnect or move to a different 1932 * channel from this point on. There's no telling what our peer will do. 1933 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1934 * have an incompatible wider chandef. 1935 */ 1936 ieee80211_teardown_tdls_peers(sdata); 1937 1938 mutex_lock(&local->mtx); 1939 mutex_lock(&local->chanctx_mtx); 1940 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1941 lockdep_is_held(&local->chanctx_mtx)); 1942 if (!conf) { 1943 sdata_info(sdata, 1944 "no channel context assigned to vif?, disconnecting\n"); 1945 goto drop_connection; 1946 } 1947 1948 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1949 1950 if (local->use_chanctx && 1951 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1952 sdata_info(sdata, 1953 "driver doesn't support chan-switch with channel contexts\n"); 1954 goto drop_connection; 1955 } 1956 1957 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1958 sdata_info(sdata, 1959 "preparing for channel switch failed, disconnecting\n"); 1960 goto drop_connection; 1961 } 1962 1963 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1964 chanctx->mode, false); 1965 if (res) { 1966 sdata_info(sdata, 1967 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1968 res); 1969 goto drop_connection; 1970 } 1971 mutex_unlock(&local->chanctx_mtx); 1972 1973 link->conf->csa_active = true; 1974 link->csa_chandef = csa_ie.chandef; 1975 link->csa_block_tx = csa_ie.mode; 1976 link->u.mgd.csa_ignored_same_chan = false; 1977 link->u.mgd.beacon_crc_valid = false; 1978 1979 if (link->csa_block_tx) 1980 ieee80211_stop_vif_queues(local, sdata, 1981 IEEE80211_QUEUE_STOP_REASON_CSA); 1982 mutex_unlock(&local->mtx); 1983 1984 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1985 link->link_id, csa_ie.count, 1986 csa_ie.mode, 0); 1987 1988 if (local->ops->channel_switch) { 1989 /* use driver's channel switch callback */ 1990 drv_channel_switch(local, sdata, &ch_switch); 1991 return; 1992 } 1993 1994 /* channel switch handled in software */ 1995 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 1996 cbss->beacon_interval); 1997 wiphy_delayed_work_queue(local->hw.wiphy, 1998 &link->u.mgd.chswitch_work, 1999 timeout); 2000 return; 2001 lock_and_drop_connection: 2002 mutex_lock(&local->mtx); 2003 mutex_lock(&local->chanctx_mtx); 2004 drop_connection: 2005 /* 2006 * This is just so that the disconnect flow will know that 2007 * we were trying to switch channel and failed. In case the 2008 * mode is 1 (we are not allowed to Tx), we will know not to 2009 * send a deauthentication frame. Those two fields will be 2010 * reset when the disconnection worker runs. 2011 */ 2012 link->conf->csa_active = true; 2013 link->csa_block_tx = csa_ie.mode; 2014 2015 wiphy_work_queue(sdata->local->hw.wiphy, 2016 &ifmgd->csa_connection_drop_work); 2017 mutex_unlock(&local->chanctx_mtx); 2018 mutex_unlock(&local->mtx); 2019 } 2020 2021 static bool ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,const u8 * country_ie,u8 country_ie_len,const u8 * pwr_constr_elem,int * chan_pwr,int * pwr_reduction)2022 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2023 struct ieee80211_channel *channel, 2024 const u8 *country_ie, u8 country_ie_len, 2025 const u8 *pwr_constr_elem, 2026 int *chan_pwr, int *pwr_reduction) 2027 { 2028 struct ieee80211_country_ie_triplet *triplet; 2029 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2030 int i, chan_increment; 2031 bool have_chan_pwr = false; 2032 2033 /* Invalid IE */ 2034 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2035 return false; 2036 2037 triplet = (void *)(country_ie + 3); 2038 country_ie_len -= 3; 2039 2040 switch (channel->band) { 2041 default: 2042 WARN_ON_ONCE(1); 2043 fallthrough; 2044 case NL80211_BAND_2GHZ: 2045 case NL80211_BAND_60GHZ: 2046 case NL80211_BAND_LC: 2047 chan_increment = 1; 2048 break; 2049 case NL80211_BAND_5GHZ: 2050 chan_increment = 4; 2051 break; 2052 case NL80211_BAND_6GHZ: 2053 /* 2054 * In the 6 GHz band, the "maximum transmit power level" 2055 * field in the triplets is reserved, and thus will be 2056 * zero and we shouldn't use it to control TX power. 2057 * The actual TX power will be given in the transmit 2058 * power envelope element instead. 2059 */ 2060 return false; 2061 } 2062 2063 /* find channel */ 2064 while (country_ie_len >= 3) { 2065 u8 first_channel = triplet->chans.first_channel; 2066 2067 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2068 goto next; 2069 2070 for (i = 0; i < triplet->chans.num_channels; i++) { 2071 if (first_channel + i * chan_increment == chan) { 2072 have_chan_pwr = true; 2073 *chan_pwr = triplet->chans.max_power; 2074 break; 2075 } 2076 } 2077 if (have_chan_pwr) 2078 break; 2079 2080 next: 2081 triplet++; 2082 country_ie_len -= 3; 2083 } 2084 2085 if (have_chan_pwr && pwr_constr_elem) 2086 *pwr_reduction = *pwr_constr_elem; 2087 else 2088 *pwr_reduction = 0; 2089 2090 return have_chan_pwr; 2091 } 2092 ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,const u8 * cisco_dtpc_ie,int * pwr_level)2093 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2094 struct ieee80211_channel *channel, 2095 const u8 *cisco_dtpc_ie, 2096 int *pwr_level) 2097 { 2098 /* From practical testing, the first data byte of the DTPC element 2099 * seems to contain the requested dBm level, and the CLI on Cisco 2100 * APs clearly state the range is -127 to 127 dBm, which indicates 2101 * a signed byte, although it seemingly never actually goes negative. 2102 * The other byte seems to always be zero. 2103 */ 2104 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2105 } 2106 ieee80211_handle_pwr_constr(struct ieee80211_link_data * link,struct ieee80211_channel * channel,struct ieee80211_mgmt * mgmt,const u8 * country_ie,u8 country_ie_len,const u8 * pwr_constr_ie,const u8 * cisco_dtpc_ie)2107 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2108 struct ieee80211_channel *channel, 2109 struct ieee80211_mgmt *mgmt, 2110 const u8 *country_ie, u8 country_ie_len, 2111 const u8 *pwr_constr_ie, 2112 const u8 *cisco_dtpc_ie) 2113 { 2114 struct ieee80211_sub_if_data *sdata = link->sdata; 2115 bool has_80211h_pwr = false, has_cisco_pwr = false; 2116 int chan_pwr = 0, pwr_reduction_80211h = 0; 2117 int pwr_level_cisco, pwr_level_80211h; 2118 int new_ap_level; 2119 __le16 capab = mgmt->u.probe_resp.capab_info; 2120 2121 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2122 return 0; /* TODO */ 2123 2124 if (country_ie && 2125 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2126 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2127 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2128 sdata, channel, country_ie, country_ie_len, 2129 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2130 pwr_level_80211h = 2131 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2132 } 2133 2134 if (cisco_dtpc_ie) { 2135 ieee80211_find_cisco_dtpc( 2136 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2137 has_cisco_pwr = true; 2138 } 2139 2140 if (!has_80211h_pwr && !has_cisco_pwr) 2141 return 0; 2142 2143 /* If we have both 802.11h and Cisco DTPC, apply both limits 2144 * by picking the smallest of the two power levels advertised. 2145 */ 2146 if (has_80211h_pwr && 2147 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2148 new_ap_level = pwr_level_80211h; 2149 2150 if (link->ap_power_level == new_ap_level) 2151 return 0; 2152 2153 sdata_dbg(sdata, 2154 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2155 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2156 link->u.mgd.bssid); 2157 } else { /* has_cisco_pwr is always true here. */ 2158 new_ap_level = pwr_level_cisco; 2159 2160 if (link->ap_power_level == new_ap_level) 2161 return 0; 2162 2163 sdata_dbg(sdata, 2164 "Limiting TX power to %d dBm as advertised by %pM\n", 2165 pwr_level_cisco, link->u.mgd.bssid); 2166 } 2167 2168 link->ap_power_level = new_ap_level; 2169 if (__ieee80211_recalc_txpower(sdata)) 2170 return BSS_CHANGED_TXPOWER; 2171 return 0; 2172 } 2173 2174 /* powersave */ ieee80211_enable_ps(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)2175 static void ieee80211_enable_ps(struct ieee80211_local *local, 2176 struct ieee80211_sub_if_data *sdata) 2177 { 2178 struct ieee80211_conf *conf = &local->hw.conf; 2179 2180 /* 2181 * If we are scanning right now then the parameters will 2182 * take effect when scan finishes. 2183 */ 2184 if (local->scanning) 2185 return; 2186 2187 if (conf->dynamic_ps_timeout > 0 && 2188 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2189 mod_timer(&local->dynamic_ps_timer, jiffies + 2190 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2191 } else { 2192 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2193 ieee80211_send_nullfunc(local, sdata, true); 2194 2195 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2196 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2197 return; 2198 2199 conf->flags |= IEEE80211_CONF_PS; 2200 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2201 } 2202 } 2203 ieee80211_change_ps(struct ieee80211_local * local)2204 static void ieee80211_change_ps(struct ieee80211_local *local) 2205 { 2206 struct ieee80211_conf *conf = &local->hw.conf; 2207 2208 if (local->ps_sdata) { 2209 ieee80211_enable_ps(local, local->ps_sdata); 2210 } else if (conf->flags & IEEE80211_CONF_PS) { 2211 conf->flags &= ~IEEE80211_CONF_PS; 2212 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2213 del_timer_sync(&local->dynamic_ps_timer); 2214 cancel_work_sync(&local->dynamic_ps_enable_work); 2215 } 2216 } 2217 ieee80211_powersave_allowed(struct ieee80211_sub_if_data * sdata)2218 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2219 { 2220 struct ieee80211_local *local = sdata->local; 2221 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2222 struct sta_info *sta = NULL; 2223 bool authorized = false; 2224 2225 if (!mgd->powersave) 2226 return false; 2227 2228 if (mgd->broken_ap) 2229 return false; 2230 2231 if (!mgd->associated) 2232 return false; 2233 2234 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2235 return false; 2236 2237 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2238 !sdata->deflink.u.mgd.have_beacon) 2239 return false; 2240 2241 rcu_read_lock(); 2242 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2243 if (sta) 2244 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2245 rcu_read_unlock(); 2246 2247 return authorized; 2248 } 2249 2250 /* need to hold RTNL or interface lock */ ieee80211_recalc_ps(struct ieee80211_local * local)2251 void ieee80211_recalc_ps(struct ieee80211_local *local) 2252 { 2253 struct ieee80211_sub_if_data *sdata, *found = NULL; 2254 int count = 0; 2255 int timeout; 2256 2257 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2258 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2259 local->ps_sdata = NULL; 2260 return; 2261 } 2262 2263 list_for_each_entry(sdata, &local->interfaces, list) { 2264 if (!ieee80211_sdata_running(sdata)) 2265 continue; 2266 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2267 /* If an AP vif is found, then disable PS 2268 * by setting the count to zero thereby setting 2269 * ps_sdata to NULL. 2270 */ 2271 count = 0; 2272 break; 2273 } 2274 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2275 continue; 2276 found = sdata; 2277 count++; 2278 } 2279 2280 if (count == 1 && ieee80211_powersave_allowed(found)) { 2281 u8 dtimper = found->deflink.u.mgd.dtim_period; 2282 2283 timeout = local->dynamic_ps_forced_timeout; 2284 if (timeout < 0) 2285 timeout = 100; 2286 local->hw.conf.dynamic_ps_timeout = timeout; 2287 2288 /* If the TIM IE is invalid, pretend the value is 1 */ 2289 if (!dtimper) 2290 dtimper = 1; 2291 2292 local->hw.conf.ps_dtim_period = dtimper; 2293 local->ps_sdata = found; 2294 } else { 2295 local->ps_sdata = NULL; 2296 } 2297 2298 ieee80211_change_ps(local); 2299 } 2300 ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data * sdata)2301 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2302 { 2303 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2304 2305 if (sdata->vif.cfg.ps != ps_allowed) { 2306 sdata->vif.cfg.ps = ps_allowed; 2307 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2308 } 2309 } 2310 ieee80211_dynamic_ps_disable_work(struct work_struct * work)2311 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2312 { 2313 struct ieee80211_local *local = 2314 container_of(work, struct ieee80211_local, 2315 dynamic_ps_disable_work); 2316 2317 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2318 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2319 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2320 } 2321 2322 ieee80211_wake_queues_by_reason(&local->hw, 2323 IEEE80211_MAX_QUEUE_MAP, 2324 IEEE80211_QUEUE_STOP_REASON_PS, 2325 false); 2326 } 2327 ieee80211_dynamic_ps_enable_work(struct work_struct * work)2328 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2329 { 2330 struct ieee80211_local *local = 2331 container_of(work, struct ieee80211_local, 2332 dynamic_ps_enable_work); 2333 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2334 struct ieee80211_if_managed *ifmgd; 2335 unsigned long flags; 2336 int q; 2337 2338 /* can only happen when PS was just disabled anyway */ 2339 if (!sdata) 2340 return; 2341 2342 ifmgd = &sdata->u.mgd; 2343 2344 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2345 return; 2346 2347 if (local->hw.conf.dynamic_ps_timeout > 0) { 2348 /* don't enter PS if TX frames are pending */ 2349 if (drv_tx_frames_pending(local)) { 2350 mod_timer(&local->dynamic_ps_timer, jiffies + 2351 msecs_to_jiffies( 2352 local->hw.conf.dynamic_ps_timeout)); 2353 return; 2354 } 2355 2356 /* 2357 * transmission can be stopped by others which leads to 2358 * dynamic_ps_timer expiry. Postpone the ps timer if it 2359 * is not the actual idle state. 2360 */ 2361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2362 for (q = 0; q < local->hw.queues; q++) { 2363 if (local->queue_stop_reasons[q]) { 2364 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2365 flags); 2366 mod_timer(&local->dynamic_ps_timer, jiffies + 2367 msecs_to_jiffies( 2368 local->hw.conf.dynamic_ps_timeout)); 2369 return; 2370 } 2371 } 2372 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2373 } 2374 2375 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2376 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2377 if (drv_tx_frames_pending(local)) { 2378 mod_timer(&local->dynamic_ps_timer, jiffies + 2379 msecs_to_jiffies( 2380 local->hw.conf.dynamic_ps_timeout)); 2381 } else { 2382 ieee80211_send_nullfunc(local, sdata, true); 2383 /* Flush to get the tx status of nullfunc frame */ 2384 ieee80211_flush_queues(local, sdata, false); 2385 } 2386 } 2387 2388 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2389 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2390 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2391 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2392 local->hw.conf.flags |= IEEE80211_CONF_PS; 2393 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2394 } 2395 } 2396 ieee80211_dynamic_ps_timer(struct timer_list * t)2397 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2398 { 2399 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2400 2401 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2402 } 2403 ieee80211_dfs_cac_timer_work(struct work_struct * work)2404 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2405 { 2406 struct delayed_work *delayed_work = to_delayed_work(work); 2407 struct ieee80211_link_data *link = 2408 container_of(delayed_work, struct ieee80211_link_data, 2409 dfs_cac_timer_work); 2410 struct cfg80211_chan_def chandef = link->conf->chandef; 2411 struct ieee80211_sub_if_data *sdata = link->sdata; 2412 2413 mutex_lock(&sdata->local->mtx); 2414 if (sdata->wdev.cac_started) { 2415 ieee80211_link_release_channel(link); 2416 cfg80211_cac_event(sdata->dev, &chandef, 2417 NL80211_RADAR_CAC_FINISHED, 2418 GFP_KERNEL); 2419 } 2420 mutex_unlock(&sdata->local->mtx); 2421 } 2422 2423 static bool __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)2424 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2425 { 2426 struct ieee80211_local *local = sdata->local; 2427 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2428 bool ret = false; 2429 int ac; 2430 2431 if (local->hw.queues < IEEE80211_NUM_ACS) 2432 return false; 2433 2434 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2435 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2436 int non_acm_ac; 2437 unsigned long now = jiffies; 2438 2439 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2440 tx_tspec->admitted_time && 2441 time_after(now, tx_tspec->time_slice_start + HZ)) { 2442 tx_tspec->consumed_tx_time = 0; 2443 tx_tspec->time_slice_start = now; 2444 2445 if (tx_tspec->downgraded) 2446 tx_tspec->action = 2447 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2448 } 2449 2450 switch (tx_tspec->action) { 2451 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2452 /* take the original parameters */ 2453 if (drv_conf_tx(local, &sdata->deflink, ac, 2454 &sdata->deflink.tx_conf[ac])) 2455 link_err(&sdata->deflink, 2456 "failed to set TX queue parameters for queue %d\n", 2457 ac); 2458 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2459 tx_tspec->downgraded = false; 2460 ret = true; 2461 break; 2462 case TX_TSPEC_ACTION_DOWNGRADE: 2463 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2464 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2465 ret = true; 2466 break; 2467 } 2468 /* downgrade next lower non-ACM AC */ 2469 for (non_acm_ac = ac + 1; 2470 non_acm_ac < IEEE80211_NUM_ACS; 2471 non_acm_ac++) 2472 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2473 break; 2474 /* Usually the loop will result in using BK even if it 2475 * requires admission control, but such a configuration 2476 * makes no sense and we have to transmit somehow - the 2477 * AC selection does the same thing. 2478 * If we started out trying to downgrade from BK, then 2479 * the extra condition here might be needed. 2480 */ 2481 if (non_acm_ac >= IEEE80211_NUM_ACS) 2482 non_acm_ac = IEEE80211_AC_BK; 2483 if (drv_conf_tx(local, &sdata->deflink, ac, 2484 &sdata->deflink.tx_conf[non_acm_ac])) 2485 link_err(&sdata->deflink, 2486 "failed to set TX queue parameters for queue %d\n", 2487 ac); 2488 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2489 ret = true; 2490 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2491 tx_tspec->time_slice_start + HZ - now + 1); 2492 break; 2493 case TX_TSPEC_ACTION_NONE: 2494 /* nothing now */ 2495 break; 2496 } 2497 } 2498 2499 return ret; 2500 } 2501 ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)2502 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2503 { 2504 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2505 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2506 BSS_CHANGED_QOS); 2507 } 2508 ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct * work)2509 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2510 { 2511 struct ieee80211_sub_if_data *sdata; 2512 2513 sdata = container_of(work, struct ieee80211_sub_if_data, 2514 u.mgd.tx_tspec_wk.work); 2515 ieee80211_sta_handle_tspec_ac_params(sdata); 2516 } 2517 ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data * link)2518 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2519 { 2520 struct ieee80211_sub_if_data *sdata = link->sdata; 2521 struct ieee80211_local *local = sdata->local; 2522 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2523 struct ieee80211_tx_queue_params *params = link->tx_conf; 2524 u8 ac; 2525 2526 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2527 mlme_dbg(sdata, 2528 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2529 ac, params[ac].acm, 2530 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2531 params[ac].txop, params[ac].uapsd, 2532 ifmgd->tx_tspec[ac].downgraded); 2533 if (!ifmgd->tx_tspec[ac].downgraded && 2534 drv_conf_tx(local, link, ac, ¶ms[ac])) 2535 link_err(link, 2536 "failed to set TX queue parameters for AC %d\n", 2537 ac); 2538 } 2539 } 2540 2541 /* MLME */ 2542 static bool ieee80211_sta_wmm_params(struct ieee80211_local * local,struct ieee80211_link_data * link,const u8 * wmm_param,size_t wmm_param_len,const struct ieee80211_mu_edca_param_set * mu_edca)2543 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2544 struct ieee80211_link_data *link, 2545 const u8 *wmm_param, size_t wmm_param_len, 2546 const struct ieee80211_mu_edca_param_set *mu_edca) 2547 { 2548 struct ieee80211_sub_if_data *sdata = link->sdata; 2549 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2550 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2551 size_t left; 2552 int count, mu_edca_count, ac; 2553 const u8 *pos; 2554 u8 uapsd_queues = 0; 2555 2556 if (!local->ops->conf_tx) 2557 return false; 2558 2559 if (local->hw.queues < IEEE80211_NUM_ACS) 2560 return false; 2561 2562 if (!wmm_param) 2563 return false; 2564 2565 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2566 return false; 2567 2568 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2569 uapsd_queues = ifmgd->uapsd_queues; 2570 2571 count = wmm_param[6] & 0x0f; 2572 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2573 * if mu_edca was preset before and now it disappeared tell 2574 * the driver about it. 2575 */ 2576 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2577 if (count == link->u.mgd.wmm_last_param_set && 2578 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2579 return false; 2580 link->u.mgd.wmm_last_param_set = count; 2581 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2582 2583 pos = wmm_param + 8; 2584 left = wmm_param_len - 8; 2585 2586 memset(¶ms, 0, sizeof(params)); 2587 2588 sdata->wmm_acm = 0; 2589 for (; left >= 4; left -= 4, pos += 4) { 2590 int aci = (pos[0] >> 5) & 0x03; 2591 int acm = (pos[0] >> 4) & 0x01; 2592 bool uapsd = false; 2593 2594 switch (aci) { 2595 case 1: /* AC_BK */ 2596 ac = IEEE80211_AC_BK; 2597 if (acm) 2598 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2599 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2600 uapsd = true; 2601 params[ac].mu_edca = !!mu_edca; 2602 if (mu_edca) 2603 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2604 break; 2605 case 2: /* AC_VI */ 2606 ac = IEEE80211_AC_VI; 2607 if (acm) 2608 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2609 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2610 uapsd = true; 2611 params[ac].mu_edca = !!mu_edca; 2612 if (mu_edca) 2613 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2614 break; 2615 case 3: /* AC_VO */ 2616 ac = IEEE80211_AC_VO; 2617 if (acm) 2618 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2619 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2620 uapsd = true; 2621 params[ac].mu_edca = !!mu_edca; 2622 if (mu_edca) 2623 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2624 break; 2625 case 0: /* AC_BE */ 2626 default: 2627 ac = IEEE80211_AC_BE; 2628 if (acm) 2629 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2630 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2631 uapsd = true; 2632 params[ac].mu_edca = !!mu_edca; 2633 if (mu_edca) 2634 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2635 break; 2636 } 2637 2638 params[ac].aifs = pos[0] & 0x0f; 2639 2640 if (params[ac].aifs < 2) { 2641 link_info(link, 2642 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2643 params[ac].aifs, aci); 2644 params[ac].aifs = 2; 2645 } 2646 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2647 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2648 params[ac].txop = get_unaligned_le16(pos + 2); 2649 params[ac].acm = acm; 2650 params[ac].uapsd = uapsd; 2651 2652 if (params[ac].cw_min == 0 || 2653 params[ac].cw_min > params[ac].cw_max) { 2654 link_info(link, 2655 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2656 params[ac].cw_min, params[ac].cw_max, aci); 2657 return false; 2658 } 2659 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2660 } 2661 2662 /* WMM specification requires all 4 ACIs. */ 2663 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2664 if (params[ac].cw_min == 0) { 2665 link_info(link, 2666 "AP has invalid WMM params (missing AC %d), using defaults\n", 2667 ac); 2668 return false; 2669 } 2670 } 2671 2672 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2673 link->tx_conf[ac] = params[ac]; 2674 2675 ieee80211_mgd_set_link_qos_params(link); 2676 2677 /* enable WMM or activate new settings */ 2678 link->conf->qos = true; 2679 return true; 2680 } 2681 __ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)2682 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2683 { 2684 lockdep_assert_held(&sdata->local->mtx); 2685 2686 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2687 ieee80211_run_deferred_scan(sdata->local); 2688 } 2689 ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)2690 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2691 { 2692 mutex_lock(&sdata->local->mtx); 2693 __ieee80211_stop_poll(sdata); 2694 mutex_unlock(&sdata->local->mtx); 2695 } 2696 ieee80211_handle_bss_capability(struct ieee80211_link_data * link,u16 capab,bool erp_valid,u8 erp)2697 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2698 u16 capab, bool erp_valid, u8 erp) 2699 { 2700 struct ieee80211_bss_conf *bss_conf = link->conf; 2701 struct ieee80211_supported_band *sband; 2702 u64 changed = 0; 2703 bool use_protection; 2704 bool use_short_preamble; 2705 bool use_short_slot; 2706 2707 sband = ieee80211_get_link_sband(link); 2708 if (!sband) 2709 return changed; 2710 2711 if (erp_valid) { 2712 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2713 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2714 } else { 2715 use_protection = false; 2716 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2717 } 2718 2719 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2720 if (sband->band == NL80211_BAND_5GHZ || 2721 sband->band == NL80211_BAND_6GHZ) 2722 use_short_slot = true; 2723 2724 if (use_protection != bss_conf->use_cts_prot) { 2725 bss_conf->use_cts_prot = use_protection; 2726 changed |= BSS_CHANGED_ERP_CTS_PROT; 2727 } 2728 2729 if (use_short_preamble != bss_conf->use_short_preamble) { 2730 bss_conf->use_short_preamble = use_short_preamble; 2731 changed |= BSS_CHANGED_ERP_PREAMBLE; 2732 } 2733 2734 if (use_short_slot != bss_conf->use_short_slot) { 2735 bss_conf->use_short_slot = use_short_slot; 2736 changed |= BSS_CHANGED_ERP_SLOT; 2737 } 2738 2739 return changed; 2740 } 2741 ieee80211_link_set_associated(struct ieee80211_link_data * link,struct cfg80211_bss * cbss)2742 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2743 struct cfg80211_bss *cbss) 2744 { 2745 struct ieee80211_sub_if_data *sdata = link->sdata; 2746 struct ieee80211_bss_conf *bss_conf = link->conf; 2747 struct ieee80211_bss *bss = (void *)cbss->priv; 2748 u64 changed = BSS_CHANGED_QOS; 2749 2750 /* not really used in MLO */ 2751 sdata->u.mgd.beacon_timeout = 2752 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2753 bss_conf->beacon_int)); 2754 2755 changed |= ieee80211_handle_bss_capability(link, 2756 bss_conf->assoc_capability, 2757 bss->has_erp_value, 2758 bss->erp_value); 2759 2760 ieee80211_check_rate_mask(link); 2761 2762 link->u.mgd.bss = cbss; 2763 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2764 2765 if (sdata->vif.p2p || 2766 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2767 const struct cfg80211_bss_ies *ies; 2768 2769 rcu_read_lock(); 2770 ies = rcu_dereference(cbss->ies); 2771 if (ies) { 2772 int ret; 2773 2774 ret = cfg80211_get_p2p_attr( 2775 ies->data, ies->len, 2776 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2777 (u8 *) &bss_conf->p2p_noa_attr, 2778 sizeof(bss_conf->p2p_noa_attr)); 2779 if (ret >= 2) { 2780 link->u.mgd.p2p_noa_index = 2781 bss_conf->p2p_noa_attr.index; 2782 changed |= BSS_CHANGED_P2P_PS; 2783 } 2784 } 2785 rcu_read_unlock(); 2786 } 2787 2788 if (link->u.mgd.have_beacon) { 2789 bss_conf->beacon_rate = bss->beacon_rate; 2790 changed |= BSS_CHANGED_BEACON_INFO; 2791 } else { 2792 bss_conf->beacon_rate = NULL; 2793 } 2794 2795 /* Tell the driver to monitor connection quality (if supported) */ 2796 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2797 bss_conf->cqm_rssi_thold) 2798 changed |= BSS_CHANGED_CQM; 2799 2800 return changed; 2801 } 2802 ieee80211_set_associated(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgd_assoc_data * assoc_data,u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])2803 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2804 struct ieee80211_mgd_assoc_data *assoc_data, 2805 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2806 { 2807 struct ieee80211_local *local = sdata->local; 2808 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2809 u64 vif_changed = BSS_CHANGED_ASSOC; 2810 unsigned int link_id; 2811 2812 sdata->u.mgd.associated = true; 2813 2814 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2815 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2816 struct ieee80211_link_data *link; 2817 2818 if (!cbss || 2819 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2820 continue; 2821 2822 if (ieee80211_vif_is_mld(&sdata->vif) && 2823 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 2824 continue; 2825 2826 link = sdata_dereference(sdata->link[link_id], sdata); 2827 if (WARN_ON(!link)) 2828 return; 2829 2830 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2831 } 2832 2833 /* just to be sure */ 2834 ieee80211_stop_poll(sdata); 2835 2836 ieee80211_led_assoc(local, 1); 2837 2838 vif_cfg->assoc = 1; 2839 2840 /* Enable ARP filtering */ 2841 if (vif_cfg->arp_addr_cnt) 2842 vif_changed |= BSS_CHANGED_ARP_FILTER; 2843 2844 if (ieee80211_vif_is_mld(&sdata->vif)) { 2845 for (link_id = 0; 2846 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2847 link_id++) { 2848 struct ieee80211_link_data *link; 2849 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2850 2851 if (!cbss || 2852 !(BIT(link_id) & 2853 ieee80211_vif_usable_links(&sdata->vif)) || 2854 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2855 continue; 2856 2857 link = sdata_dereference(sdata->link[link_id], sdata); 2858 if (WARN_ON(!link)) 2859 return; 2860 2861 ieee80211_link_info_change_notify(sdata, link, 2862 changed[link_id]); 2863 2864 ieee80211_recalc_smps(sdata, link); 2865 } 2866 2867 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2868 } else { 2869 ieee80211_bss_info_change_notify(sdata, 2870 vif_changed | changed[0]); 2871 } 2872 2873 mutex_lock(&local->iflist_mtx); 2874 ieee80211_recalc_ps(local); 2875 mutex_unlock(&local->iflist_mtx); 2876 2877 /* leave this here to not change ordering in non-MLO cases */ 2878 if (!ieee80211_vif_is_mld(&sdata->vif)) 2879 ieee80211_recalc_smps(sdata, &sdata->deflink); 2880 ieee80211_recalc_ps_vif(sdata); 2881 2882 netif_carrier_on(sdata->dev); 2883 } 2884 ieee80211_set_disassoc(struct ieee80211_sub_if_data * sdata,u16 stype,u16 reason,bool tx,u8 * frame_buf)2885 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2886 u16 stype, u16 reason, bool tx, 2887 u8 *frame_buf) 2888 { 2889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2890 struct ieee80211_local *local = sdata->local; 2891 unsigned int link_id; 2892 u64 changed = 0; 2893 struct ieee80211_prep_tx_info info = { 2894 .subtype = stype, 2895 }; 2896 2897 sdata_assert_lock(sdata); 2898 2899 if (WARN_ON_ONCE(tx && !frame_buf)) 2900 return; 2901 2902 if (WARN_ON(!ifmgd->associated)) 2903 return; 2904 2905 ieee80211_stop_poll(sdata); 2906 2907 ifmgd->associated = false; 2908 2909 /* other links will be destroyed */ 2910 sdata->deflink.u.mgd.bss = NULL; 2911 2912 netif_carrier_off(sdata->dev); 2913 2914 /* 2915 * if we want to get out of ps before disassoc (why?) we have 2916 * to do it before sending disassoc, as otherwise the null-packet 2917 * won't be valid. 2918 */ 2919 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2920 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2921 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2922 } 2923 local->ps_sdata = NULL; 2924 2925 /* disable per-vif ps */ 2926 ieee80211_recalc_ps_vif(sdata); 2927 2928 /* make sure ongoing transmission finishes */ 2929 synchronize_net(); 2930 2931 /* 2932 * drop any frame before deauth/disassoc, this can be data or 2933 * management frame. Since we are disconnecting, we should not 2934 * insist sending these frames which can take time and delay 2935 * the disconnection and possible the roaming. 2936 */ 2937 if (tx) 2938 ieee80211_flush_queues(local, sdata, true); 2939 2940 /* deauthenticate/disassociate now */ 2941 if (tx || frame_buf) { 2942 /* 2943 * In multi channel scenarios guarantee that the virtual 2944 * interface is granted immediate airtime to transmit the 2945 * deauthentication frame by calling mgd_prepare_tx, if the 2946 * driver requested so. 2947 */ 2948 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2949 !sdata->deflink.u.mgd.have_beacon) { 2950 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2951 } 2952 2953 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2954 sdata->vif.cfg.ap_addr, stype, 2955 reason, tx, frame_buf); 2956 } 2957 2958 /* flush out frame - make sure the deauth was actually sent */ 2959 if (tx) 2960 ieee80211_flush_queues(local, sdata, false); 2961 2962 drv_mgd_complete_tx(sdata->local, sdata, &info); 2963 2964 /* clear AP addr only after building the needed mgmt frames */ 2965 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2966 eth_zero_addr(sdata->vif.cfg.ap_addr); 2967 2968 sdata->vif.cfg.ssid_len = 0; 2969 2970 /* remove AP and TDLS peers */ 2971 sta_info_flush(sdata); 2972 2973 /* finally reset all BSS / config parameters */ 2974 if (!ieee80211_vif_is_mld(&sdata->vif)) 2975 changed |= ieee80211_reset_erp_info(sdata); 2976 2977 ieee80211_led_assoc(local, 0); 2978 changed |= BSS_CHANGED_ASSOC; 2979 sdata->vif.cfg.assoc = false; 2980 2981 sdata->deflink.u.mgd.p2p_noa_index = -1; 2982 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2983 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2984 2985 /* on the next assoc, re-program HT/VHT parameters */ 2986 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2987 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2988 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2989 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2990 2991 /* 2992 * reset MU-MIMO ownership and group data in default link, 2993 * if used, other links are destroyed 2994 */ 2995 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2996 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2997 memset(sdata->vif.bss_conf.mu_group.position, 0, 2998 sizeof(sdata->vif.bss_conf.mu_group.position)); 2999 if (!ieee80211_vif_is_mld(&sdata->vif)) 3000 changed |= BSS_CHANGED_MU_GROUPS; 3001 sdata->vif.bss_conf.mu_mimo_owner = false; 3002 3003 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3004 3005 del_timer_sync(&local->dynamic_ps_timer); 3006 cancel_work_sync(&local->dynamic_ps_enable_work); 3007 3008 /* Disable ARP filtering */ 3009 if (sdata->vif.cfg.arp_addr_cnt) 3010 changed |= BSS_CHANGED_ARP_FILTER; 3011 3012 sdata->vif.bss_conf.qos = false; 3013 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3014 changed |= BSS_CHANGED_QOS; 3015 /* The BSSID (not really interesting) and HT changed */ 3016 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3017 ieee80211_bss_info_change_notify(sdata, changed); 3018 } else { 3019 ieee80211_vif_cfg_change_notify(sdata, changed); 3020 } 3021 3022 /* disassociated - set to defaults now */ 3023 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3024 3025 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3026 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3027 del_timer_sync(&sdata->u.mgd.timer); 3028 3029 sdata->vif.bss_conf.dtim_period = 0; 3030 sdata->vif.bss_conf.beacon_rate = NULL; 3031 3032 sdata->deflink.u.mgd.have_beacon = false; 3033 sdata->deflink.u.mgd.tracking_signal_avg = false; 3034 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3035 3036 ifmgd->flags = 0; 3037 sdata->deflink.u.mgd.conn_flags = 0; 3038 mutex_lock(&local->mtx); 3039 3040 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3041 struct ieee80211_link_data *link; 3042 3043 link = sdata_dereference(sdata->link[link_id], sdata); 3044 if (!link) 3045 continue; 3046 ieee80211_link_release_channel(link); 3047 } 3048 3049 sdata->vif.bss_conf.csa_active = false; 3050 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3051 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3052 if (sdata->deflink.csa_block_tx) { 3053 ieee80211_wake_vif_queues(local, sdata, 3054 IEEE80211_QUEUE_STOP_REASON_CSA); 3055 sdata->deflink.csa_block_tx = false; 3056 } 3057 mutex_unlock(&local->mtx); 3058 3059 /* existing TX TSPEC sessions no longer exist */ 3060 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3061 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 3062 3063 sdata->vif.bss_conf.pwr_reduction = 0; 3064 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3065 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3066 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3067 3068 ieee80211_vif_set_links(sdata, 0, 0); 3069 } 3070 ieee80211_reset_ap_probe(struct ieee80211_sub_if_data * sdata)3071 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3072 { 3073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3074 struct ieee80211_local *local = sdata->local; 3075 3076 mutex_lock(&local->mtx); 3077 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3078 goto out; 3079 3080 __ieee80211_stop_poll(sdata); 3081 3082 mutex_lock(&local->iflist_mtx); 3083 ieee80211_recalc_ps(local); 3084 mutex_unlock(&local->iflist_mtx); 3085 3086 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3087 goto out; 3088 3089 /* 3090 * We've received a probe response, but are not sure whether 3091 * we have or will be receiving any beacons or data, so let's 3092 * schedule the timers again, just in case. 3093 */ 3094 ieee80211_sta_reset_beacon_monitor(sdata); 3095 3096 mod_timer(&ifmgd->conn_mon_timer, 3097 round_jiffies_up(jiffies + 3098 IEEE80211_CONNECTION_IDLE_TIME)); 3099 out: 3100 mutex_unlock(&local->mtx); 3101 } 3102 ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,u16 tx_time)3103 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3104 struct ieee80211_hdr *hdr, 3105 u16 tx_time) 3106 { 3107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3108 u16 tid; 3109 int ac; 3110 struct ieee80211_sta_tx_tspec *tx_tspec; 3111 unsigned long now = jiffies; 3112 3113 if (!ieee80211_is_data_qos(hdr->frame_control)) 3114 return; 3115 3116 tid = ieee80211_get_tid(hdr); 3117 ac = ieee80211_ac_from_tid(tid); 3118 tx_tspec = &ifmgd->tx_tspec[ac]; 3119 3120 if (likely(!tx_tspec->admitted_time)) 3121 return; 3122 3123 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3124 tx_tspec->consumed_tx_time = 0; 3125 tx_tspec->time_slice_start = now; 3126 3127 if (tx_tspec->downgraded) { 3128 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3129 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3130 } 3131 } 3132 3133 if (tx_tspec->downgraded) 3134 return; 3135 3136 tx_tspec->consumed_tx_time += tx_time; 3137 3138 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3139 tx_tspec->downgraded = true; 3140 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3141 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3142 } 3143 } 3144 ieee80211_sta_tx_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,bool ack,u16 tx_time)3145 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3146 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3147 { 3148 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3149 3150 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3151 !sdata->u.mgd.probe_send_count) 3152 return; 3153 3154 if (ack) 3155 sdata->u.mgd.probe_send_count = 0; 3156 else 3157 sdata->u.mgd.nullfunc_failed = true; 3158 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3159 } 3160 ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data * sdata,const u8 * src,const u8 * dst,const u8 * ssid,size_t ssid_len,struct ieee80211_channel * channel)3161 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3162 const u8 *src, const u8 *dst, 3163 const u8 *ssid, size_t ssid_len, 3164 struct ieee80211_channel *channel) 3165 { 3166 struct sk_buff *skb; 3167 3168 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3169 ssid, ssid_len, NULL, 0, 3170 IEEE80211_PROBE_FLAG_DIRECTED); 3171 if (skb) 3172 ieee80211_tx_skb(sdata, skb); 3173 } 3174 ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data * sdata)3175 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3176 { 3177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3178 u8 *dst = sdata->vif.cfg.ap_addr; 3179 u8 unicast_limit = max(1, max_probe_tries - 3); 3180 struct sta_info *sta; 3181 3182 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3183 return; 3184 3185 /* 3186 * Try sending broadcast probe requests for the last three 3187 * probe requests after the first ones failed since some 3188 * buggy APs only support broadcast probe requests. 3189 */ 3190 if (ifmgd->probe_send_count >= unicast_limit) 3191 dst = NULL; 3192 3193 /* 3194 * When the hardware reports an accurate Tx ACK status, it's 3195 * better to send a nullfunc frame instead of a probe request, 3196 * as it will kick us off the AP quickly if we aren't associated 3197 * anymore. The timeout will be reset if the frame is ACKed by 3198 * the AP. 3199 */ 3200 ifmgd->probe_send_count++; 3201 3202 if (dst) { 3203 mutex_lock(&sdata->local->sta_mtx); 3204 sta = sta_info_get(sdata, dst); 3205 if (!WARN_ON(!sta)) 3206 ieee80211_check_fast_rx(sta); 3207 mutex_unlock(&sdata->local->sta_mtx); 3208 } 3209 3210 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3211 ifmgd->nullfunc_failed = false; 3212 ieee80211_send_nullfunc(sdata->local, sdata, false); 3213 } else { 3214 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3215 sdata->vif.cfg.ssid, 3216 sdata->vif.cfg.ssid_len, 3217 sdata->deflink.u.mgd.bss->channel); 3218 } 3219 3220 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3221 run_again(sdata, ifmgd->probe_timeout); 3222 } 3223 ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data * sdata,bool beacon)3224 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3225 bool beacon) 3226 { 3227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3228 bool already = false; 3229 3230 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3231 return; 3232 3233 if (!ieee80211_sdata_running(sdata)) 3234 return; 3235 3236 sdata_lock(sdata); 3237 3238 if (!ifmgd->associated) 3239 goto out; 3240 3241 mutex_lock(&sdata->local->mtx); 3242 3243 if (sdata->local->tmp_channel || sdata->local->scanning) { 3244 mutex_unlock(&sdata->local->mtx); 3245 goto out; 3246 } 3247 3248 if (sdata->local->suspending) { 3249 /* reschedule after resume */ 3250 mutex_unlock(&sdata->local->mtx); 3251 ieee80211_reset_ap_probe(sdata); 3252 goto out; 3253 } 3254 3255 if (beacon) { 3256 mlme_dbg_ratelimited(sdata, 3257 "detected beacon loss from AP (missed %d beacons) - probing\n", 3258 beacon_loss_count); 3259 3260 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3261 } 3262 3263 /* 3264 * The driver/our work has already reported this event or the 3265 * connection monitoring has kicked in and we have already sent 3266 * a probe request. Or maybe the AP died and the driver keeps 3267 * reporting until we disassociate... 3268 * 3269 * In either case we have to ignore the current call to this 3270 * function (except for setting the correct probe reason bit) 3271 * because otherwise we would reset the timer every time and 3272 * never check whether we received a probe response! 3273 */ 3274 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3275 already = true; 3276 3277 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3278 3279 mutex_unlock(&sdata->local->mtx); 3280 3281 if (already) 3282 goto out; 3283 3284 mutex_lock(&sdata->local->iflist_mtx); 3285 ieee80211_recalc_ps(sdata->local); 3286 mutex_unlock(&sdata->local->iflist_mtx); 3287 3288 ifmgd->probe_send_count = 0; 3289 ieee80211_mgd_probe_ap_send(sdata); 3290 out: 3291 sdata_unlock(sdata); 3292 } 3293 ieee80211_ap_probereq_get(struct ieee80211_hw * hw,struct ieee80211_vif * vif)3294 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3295 struct ieee80211_vif *vif) 3296 { 3297 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3299 struct cfg80211_bss *cbss; 3300 struct sk_buff *skb; 3301 const struct element *ssid; 3302 int ssid_len; 3303 3304 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3305 ieee80211_vif_is_mld(&sdata->vif))) 3306 return NULL; 3307 3308 sdata_assert_lock(sdata); 3309 3310 if (ifmgd->associated) 3311 cbss = sdata->deflink.u.mgd.bss; 3312 else if (ifmgd->auth_data) 3313 cbss = ifmgd->auth_data->bss; 3314 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3315 cbss = ifmgd->assoc_data->link[0].bss; 3316 else 3317 return NULL; 3318 3319 rcu_read_lock(); 3320 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3321 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3322 "invalid SSID element (len=%d)", 3323 ssid ? ssid->datalen : -1)) 3324 ssid_len = 0; 3325 else 3326 ssid_len = ssid->datalen; 3327 3328 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3329 (u32) -1, cbss->channel, 3330 ssid->data, ssid_len, 3331 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3332 rcu_read_unlock(); 3333 3334 return skb; 3335 } 3336 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3337 ieee80211_report_disconnect(struct ieee80211_sub_if_data * sdata,const u8 * buf,size_t len,bool tx,u16 reason,bool reconnect)3338 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3339 const u8 *buf, size_t len, bool tx, 3340 u16 reason, bool reconnect) 3341 { 3342 struct ieee80211_event event = { 3343 .type = MLME_EVENT, 3344 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3345 .u.mlme.reason = reason, 3346 }; 3347 3348 if (tx) 3349 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3350 else 3351 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3352 3353 drv_event_callback(sdata->local, sdata, &event); 3354 } 3355 ___ieee80211_disconnect(struct ieee80211_sub_if_data * sdata)3356 static void ___ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3357 { 3358 struct ieee80211_local *local = sdata->local; 3359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3360 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3361 bool tx; 3362 3363 if (!ifmgd->associated) 3364 return; 3365 3366 /* in MLO assume we have a link where we can TX the frame */ 3367 tx = ieee80211_vif_is_mld(&sdata->vif) || 3368 !sdata->deflink.csa_block_tx; 3369 3370 if (!ifmgd->driver_disconnect) { 3371 unsigned int link_id; 3372 3373 /* 3374 * AP is probably out of range (or not reachable for another 3375 * reason) so remove the bss structs for that AP. In the case 3376 * of multi-link, it's not clear that all of them really are 3377 * out of range, but if they weren't the driver likely would 3378 * have switched to just have a single link active? 3379 */ 3380 for (link_id = 0; 3381 link_id < ARRAY_SIZE(sdata->link); 3382 link_id++) { 3383 struct ieee80211_link_data *link; 3384 3385 link = sdata_dereference(sdata->link[link_id], sdata); 3386 if (!link) 3387 continue; 3388 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3389 link->u.mgd.bss = NULL; 3390 } 3391 } 3392 3393 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3394 ifmgd->driver_disconnect ? 3395 WLAN_REASON_DEAUTH_LEAVING : 3396 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3397 tx, frame_buf); 3398 mutex_lock(&local->mtx); 3399 /* the other links will be destroyed */ 3400 sdata->vif.bss_conf.csa_active = false; 3401 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3402 if (sdata->deflink.csa_block_tx) { 3403 ieee80211_wake_vif_queues(local, sdata, 3404 IEEE80211_QUEUE_STOP_REASON_CSA); 3405 sdata->deflink.csa_block_tx = false; 3406 } 3407 mutex_unlock(&local->mtx); 3408 3409 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3410 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3411 ifmgd->reconnect); 3412 ifmgd->reconnect = false; 3413 } 3414 __ieee80211_disconnect(struct ieee80211_sub_if_data * sdata)3415 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3416 { 3417 sdata_lock(sdata); 3418 ___ieee80211_disconnect(sdata); 3419 sdata_unlock(sdata); 3420 } 3421 ieee80211_beacon_connection_loss_work(struct wiphy * wiphy,struct wiphy_work * work)3422 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3423 struct wiphy_work *work) 3424 { 3425 struct ieee80211_sub_if_data *sdata = 3426 container_of(work, struct ieee80211_sub_if_data, 3427 u.mgd.beacon_connection_loss_work); 3428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3429 3430 if (ifmgd->connection_loss) { 3431 sdata_info(sdata, "Connection to AP %pM lost\n", 3432 sdata->vif.cfg.ap_addr); 3433 __ieee80211_disconnect(sdata); 3434 ifmgd->connection_loss = false; 3435 } else if (ifmgd->driver_disconnect) { 3436 sdata_info(sdata, 3437 "Driver requested disconnection from AP %pM\n", 3438 sdata->vif.cfg.ap_addr); 3439 __ieee80211_disconnect(sdata); 3440 ifmgd->driver_disconnect = false; 3441 } else { 3442 if (ifmgd->associated) 3443 sdata->deflink.u.mgd.beacon_loss_count++; 3444 ieee80211_mgd_probe_ap(sdata, true); 3445 } 3446 } 3447 ieee80211_csa_connection_drop_work(struct wiphy * wiphy,struct wiphy_work * work)3448 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3449 struct wiphy_work *work) 3450 { 3451 struct ieee80211_sub_if_data *sdata = 3452 container_of(work, struct ieee80211_sub_if_data, 3453 u.mgd.csa_connection_drop_work); 3454 3455 __ieee80211_disconnect(sdata); 3456 } 3457 ieee80211_beacon_loss(struct ieee80211_vif * vif)3458 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3459 { 3460 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3461 struct ieee80211_hw *hw = &sdata->local->hw; 3462 3463 trace_api_beacon_loss(sdata); 3464 3465 sdata->u.mgd.connection_loss = false; 3466 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3467 } 3468 EXPORT_SYMBOL(ieee80211_beacon_loss); 3469 ieee80211_connection_loss(struct ieee80211_vif * vif)3470 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3471 { 3472 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3473 struct ieee80211_hw *hw = &sdata->local->hw; 3474 3475 trace_api_connection_loss(sdata); 3476 3477 sdata->u.mgd.connection_loss = true; 3478 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3479 } 3480 EXPORT_SYMBOL(ieee80211_connection_loss); 3481 ieee80211_disconnect(struct ieee80211_vif * vif,bool reconnect)3482 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3483 { 3484 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3485 struct ieee80211_hw *hw = &sdata->local->hw; 3486 3487 trace_api_disconnect(sdata, reconnect); 3488 3489 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3490 return; 3491 3492 sdata->u.mgd.driver_disconnect = true; 3493 sdata->u.mgd.reconnect = reconnect; 3494 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3495 } 3496 EXPORT_SYMBOL(ieee80211_disconnect); 3497 ieee80211_destroy_auth_data(struct ieee80211_sub_if_data * sdata,bool assoc)3498 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3499 bool assoc) 3500 { 3501 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3502 3503 sdata_assert_lock(sdata); 3504 3505 if (!assoc) { 3506 /* 3507 * we are not authenticated yet, the only timer that could be 3508 * running is the timeout for the authentication response which 3509 * which is not relevant anymore. 3510 */ 3511 del_timer_sync(&sdata->u.mgd.timer); 3512 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3513 3514 /* other links are destroyed */ 3515 sdata->deflink.u.mgd.conn_flags = 0; 3516 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3517 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3518 BSS_CHANGED_BSSID); 3519 sdata->u.mgd.flags = 0; 3520 3521 mutex_lock(&sdata->local->mtx); 3522 ieee80211_link_release_channel(&sdata->deflink); 3523 ieee80211_vif_set_links(sdata, 0, 0); 3524 mutex_unlock(&sdata->local->mtx); 3525 } 3526 3527 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3528 kfree(auth_data); 3529 sdata->u.mgd.auth_data = NULL; 3530 } 3531 3532 enum assoc_status { 3533 ASSOC_SUCCESS, 3534 ASSOC_REJECTED, 3535 ASSOC_TIMEOUT, 3536 ASSOC_ABANDON, 3537 }; 3538 ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data * sdata,enum assoc_status status)3539 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3540 enum assoc_status status) 3541 { 3542 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3543 3544 sdata_assert_lock(sdata); 3545 3546 if (status != ASSOC_SUCCESS) { 3547 /* 3548 * we are not associated yet, the only timer that could be 3549 * running is the timeout for the association response which 3550 * which is not relevant anymore. 3551 */ 3552 del_timer_sync(&sdata->u.mgd.timer); 3553 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3554 3555 sdata->deflink.u.mgd.conn_flags = 0; 3556 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3557 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3558 BSS_CHANGED_BSSID); 3559 sdata->u.mgd.flags = 0; 3560 sdata->vif.bss_conf.mu_mimo_owner = false; 3561 3562 if (status != ASSOC_REJECTED) { 3563 struct cfg80211_assoc_failure data = { 3564 .timeout = status == ASSOC_TIMEOUT, 3565 }; 3566 int i; 3567 3568 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3569 ARRAY_SIZE(assoc_data->link)); 3570 3571 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3572 data.bss[i] = assoc_data->link[i].bss; 3573 3574 if (ieee80211_vif_is_mld(&sdata->vif)) 3575 data.ap_mld_addr = assoc_data->ap_addr; 3576 3577 cfg80211_assoc_failure(sdata->dev, &data); 3578 } 3579 3580 mutex_lock(&sdata->local->mtx); 3581 ieee80211_link_release_channel(&sdata->deflink); 3582 ieee80211_vif_set_links(sdata, 0, 0); 3583 mutex_unlock(&sdata->local->mtx); 3584 } 3585 3586 kfree(assoc_data); 3587 sdata->u.mgd.assoc_data = NULL; 3588 } 3589 ieee80211_auth_challenge(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3590 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3591 struct ieee80211_mgmt *mgmt, size_t len) 3592 { 3593 struct ieee80211_local *local = sdata->local; 3594 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3595 const struct element *challenge; 3596 u8 *pos; 3597 u32 tx_flags = 0; 3598 struct ieee80211_prep_tx_info info = { 3599 .subtype = IEEE80211_STYPE_AUTH, 3600 }; 3601 3602 pos = mgmt->u.auth.variable; 3603 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3604 len - (pos - (u8 *)mgmt)); 3605 if (!challenge) 3606 return; 3607 auth_data->expected_transaction = 4; 3608 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3609 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3610 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3611 IEEE80211_TX_INTFL_MLME_CONN_TX; 3612 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3613 (void *)challenge, 3614 challenge->datalen + sizeof(*challenge), 3615 auth_data->ap_addr, auth_data->ap_addr, 3616 auth_data->key, auth_data->key_len, 3617 auth_data->key_idx, tx_flags); 3618 } 3619 ieee80211_mark_sta_auth(struct ieee80211_sub_if_data * sdata)3620 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3621 { 3622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3623 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3624 struct sta_info *sta; 3625 bool result = true; 3626 3627 sdata_info(sdata, "authenticated\n"); 3628 ifmgd->auth_data->done = true; 3629 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3630 ifmgd->auth_data->timeout_started = true; 3631 run_again(sdata, ifmgd->auth_data->timeout); 3632 3633 /* move station state to auth */ 3634 mutex_lock(&sdata->local->sta_mtx); 3635 sta = sta_info_get(sdata, ap_addr); 3636 if (!sta) { 3637 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3638 result = false; 3639 goto out; 3640 } 3641 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3642 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3643 result = false; 3644 goto out; 3645 } 3646 3647 out: 3648 mutex_unlock(&sdata->local->sta_mtx); 3649 return result; 3650 } 3651 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3652 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3653 struct ieee80211_mgmt *mgmt, size_t len) 3654 { 3655 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3656 u16 auth_alg, auth_transaction, status_code; 3657 struct ieee80211_event event = { 3658 .type = MLME_EVENT, 3659 .u.mlme.data = AUTH_EVENT, 3660 }; 3661 struct ieee80211_prep_tx_info info = { 3662 .subtype = IEEE80211_STYPE_AUTH, 3663 }; 3664 3665 sdata_assert_lock(sdata); 3666 3667 if (len < 24 + 6) 3668 return; 3669 3670 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3671 return; 3672 3673 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3674 return; 3675 3676 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3677 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3678 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3679 3680 if (auth_alg != ifmgd->auth_data->algorithm || 3681 (auth_alg != WLAN_AUTH_SAE && 3682 auth_transaction != ifmgd->auth_data->expected_transaction) || 3683 (auth_alg == WLAN_AUTH_SAE && 3684 (auth_transaction < ifmgd->auth_data->expected_transaction || 3685 auth_transaction > 2))) { 3686 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3687 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3688 auth_transaction, 3689 ifmgd->auth_data->expected_transaction); 3690 goto notify_driver; 3691 } 3692 3693 if (status_code != WLAN_STATUS_SUCCESS) { 3694 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3695 3696 if (auth_alg == WLAN_AUTH_SAE && 3697 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3698 (auth_transaction == 1 && 3699 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3700 status_code == WLAN_STATUS_SAE_PK)))) { 3701 /* waiting for userspace now */ 3702 ifmgd->auth_data->waiting = true; 3703 ifmgd->auth_data->timeout = 3704 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3705 ifmgd->auth_data->timeout_started = true; 3706 run_again(sdata, ifmgd->auth_data->timeout); 3707 goto notify_driver; 3708 } 3709 3710 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3711 mgmt->sa, status_code); 3712 ieee80211_destroy_auth_data(sdata, false); 3713 event.u.mlme.status = MLME_DENIED; 3714 event.u.mlme.reason = status_code; 3715 drv_event_callback(sdata->local, sdata, &event); 3716 goto notify_driver; 3717 } 3718 3719 switch (ifmgd->auth_data->algorithm) { 3720 case WLAN_AUTH_OPEN: 3721 case WLAN_AUTH_LEAP: 3722 case WLAN_AUTH_FT: 3723 case WLAN_AUTH_SAE: 3724 case WLAN_AUTH_FILS_SK: 3725 case WLAN_AUTH_FILS_SK_PFS: 3726 case WLAN_AUTH_FILS_PK: 3727 break; 3728 case WLAN_AUTH_SHARED_KEY: 3729 if (ifmgd->auth_data->expected_transaction != 4) { 3730 ieee80211_auth_challenge(sdata, mgmt, len); 3731 /* need another frame */ 3732 return; 3733 } 3734 break; 3735 default: 3736 WARN_ONCE(1, "invalid auth alg %d", 3737 ifmgd->auth_data->algorithm); 3738 goto notify_driver; 3739 } 3740 3741 event.u.mlme.status = MLME_SUCCESS; 3742 info.success = 1; 3743 drv_event_callback(sdata->local, sdata, &event); 3744 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3745 (auth_transaction == 2 && 3746 ifmgd->auth_data->expected_transaction == 2)) { 3747 if (!ieee80211_mark_sta_auth(sdata)) 3748 return; /* ignore frame -- wait for timeout */ 3749 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3750 auth_transaction == 2) { 3751 sdata_info(sdata, "SAE peer confirmed\n"); 3752 ifmgd->auth_data->peer_confirmed = true; 3753 } 3754 3755 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3756 notify_driver: 3757 drv_mgd_complete_tx(sdata->local, sdata, &info); 3758 } 3759 3760 #define case_WLAN(type) \ 3761 case WLAN_REASON_##type: return #type 3762 ieee80211_get_reason_code_string(u16 reason_code)3763 const char *ieee80211_get_reason_code_string(u16 reason_code) 3764 { 3765 switch (reason_code) { 3766 case_WLAN(UNSPECIFIED); 3767 case_WLAN(PREV_AUTH_NOT_VALID); 3768 case_WLAN(DEAUTH_LEAVING); 3769 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3770 case_WLAN(DISASSOC_AP_BUSY); 3771 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3772 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3773 case_WLAN(DISASSOC_STA_HAS_LEFT); 3774 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3775 case_WLAN(DISASSOC_BAD_POWER); 3776 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3777 case_WLAN(INVALID_IE); 3778 case_WLAN(MIC_FAILURE); 3779 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3780 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3781 case_WLAN(IE_DIFFERENT); 3782 case_WLAN(INVALID_GROUP_CIPHER); 3783 case_WLAN(INVALID_PAIRWISE_CIPHER); 3784 case_WLAN(INVALID_AKMP); 3785 case_WLAN(UNSUPP_RSN_VERSION); 3786 case_WLAN(INVALID_RSN_IE_CAP); 3787 case_WLAN(IEEE8021X_FAILED); 3788 case_WLAN(CIPHER_SUITE_REJECTED); 3789 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3790 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3791 case_WLAN(DISASSOC_LOW_ACK); 3792 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3793 case_WLAN(QSTA_LEAVE_QBSS); 3794 case_WLAN(QSTA_NOT_USE); 3795 case_WLAN(QSTA_REQUIRE_SETUP); 3796 case_WLAN(QSTA_TIMEOUT); 3797 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3798 case_WLAN(MESH_PEER_CANCELED); 3799 case_WLAN(MESH_MAX_PEERS); 3800 case_WLAN(MESH_CONFIG); 3801 case_WLAN(MESH_CLOSE); 3802 case_WLAN(MESH_MAX_RETRIES); 3803 case_WLAN(MESH_CONFIRM_TIMEOUT); 3804 case_WLAN(MESH_INVALID_GTK); 3805 case_WLAN(MESH_INCONSISTENT_PARAM); 3806 case_WLAN(MESH_INVALID_SECURITY); 3807 case_WLAN(MESH_PATH_ERROR); 3808 case_WLAN(MESH_PATH_NOFORWARD); 3809 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3810 case_WLAN(MAC_EXISTS_IN_MBSS); 3811 case_WLAN(MESH_CHAN_REGULATORY); 3812 case_WLAN(MESH_CHAN); 3813 default: return "<unknown>"; 3814 } 3815 } 3816 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3817 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3818 struct ieee80211_mgmt *mgmt, size_t len) 3819 { 3820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3821 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3822 3823 sdata_assert_lock(sdata); 3824 3825 if (len < 24 + 2) 3826 return; 3827 3828 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3829 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3830 return; 3831 } 3832 3833 if (ifmgd->associated && 3834 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3835 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3836 sdata->vif.cfg.ap_addr, reason_code, 3837 ieee80211_get_reason_code_string(reason_code)); 3838 3839 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3840 3841 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3842 reason_code, false); 3843 return; 3844 } 3845 3846 if (ifmgd->assoc_data && 3847 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3848 sdata_info(sdata, 3849 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3850 ifmgd->assoc_data->ap_addr, reason_code, 3851 ieee80211_get_reason_code_string(reason_code)); 3852 3853 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3854 3855 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3856 return; 3857 } 3858 } 3859 3860 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3861 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3862 struct ieee80211_mgmt *mgmt, size_t len) 3863 { 3864 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3865 u16 reason_code; 3866 3867 sdata_assert_lock(sdata); 3868 3869 if (len < 24 + 2) 3870 return; 3871 3872 if (!ifmgd->associated || 3873 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3874 return; 3875 3876 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3877 3878 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3879 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3880 return; 3881 } 3882 3883 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3884 sdata->vif.cfg.ap_addr, reason_code, 3885 ieee80211_get_reason_code_string(reason_code)); 3886 3887 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3888 3889 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3890 false); 3891 } 3892 ieee80211_get_rates(struct ieee80211_supported_band * sband,u8 * supp_rates,unsigned int supp_rates_len,u32 * rates,u32 * basic_rates,bool * have_higher_than_11mbit,int * min_rate,int * min_rate_index,int shift)3893 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3894 u8 *supp_rates, unsigned int supp_rates_len, 3895 u32 *rates, u32 *basic_rates, 3896 bool *have_higher_than_11mbit, 3897 int *min_rate, int *min_rate_index, 3898 int shift) 3899 { 3900 int i, j; 3901 3902 for (i = 0; i < supp_rates_len; i++) { 3903 int rate = supp_rates[i] & 0x7f; 3904 bool is_basic = !!(supp_rates[i] & 0x80); 3905 3906 if ((rate * 5 * (1 << shift)) > 110) 3907 *have_higher_than_11mbit = true; 3908 3909 /* 3910 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 3911 * selectors since they're not rates. 3912 * 3913 * Note: Even though the membership selector and the basic 3914 * rate flag share the same bit, they are not exactly 3915 * the same. 3916 */ 3917 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3918 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3919 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3920 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 3921 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3922 continue; 3923 3924 for (j = 0; j < sband->n_bitrates; j++) { 3925 struct ieee80211_rate *br; 3926 int brate; 3927 3928 br = &sband->bitrates[j]; 3929 3930 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3931 if (brate == rate) { 3932 *rates |= BIT(j); 3933 if (is_basic) 3934 *basic_rates |= BIT(j); 3935 if ((rate * 5) < *min_rate) { 3936 *min_rate = rate * 5; 3937 *min_rate_index = j; 3938 } 3939 break; 3940 } 3941 } 3942 } 3943 } 3944 ieee80211_twt_req_supported(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct link_sta_info * link_sta,const struct ieee802_11_elems * elems)3945 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3946 struct ieee80211_supported_band *sband, 3947 const struct link_sta_info *link_sta, 3948 const struct ieee802_11_elems *elems) 3949 { 3950 const struct ieee80211_sta_he_cap *own_he_cap = 3951 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3952 3953 if (elems->ext_capab_len < 10) 3954 return false; 3955 3956 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3957 return false; 3958 3959 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3960 IEEE80211_HE_MAC_CAP0_TWT_RES && 3961 own_he_cap && 3962 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3963 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3964 } 3965 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,struct ieee80211_link_data * link,struct link_sta_info * link_sta,struct ieee802_11_elems * elems)3966 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3967 struct ieee80211_supported_band *sband, 3968 struct ieee80211_link_data *link, 3969 struct link_sta_info *link_sta, 3970 struct ieee802_11_elems *elems) 3971 { 3972 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3973 3974 if (link->conf->twt_requester != twt) { 3975 link->conf->twt_requester = twt; 3976 return BSS_CHANGED_TWT; 3977 } 3978 return 0; 3979 } 3980 ieee80211_twt_bcast_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_bss_conf * bss_conf,struct ieee80211_supported_band * sband,struct link_sta_info * link_sta)3981 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3982 struct ieee80211_bss_conf *bss_conf, 3983 struct ieee80211_supported_band *sband, 3984 struct link_sta_info *link_sta) 3985 { 3986 const struct ieee80211_sta_he_cap *own_he_cap = 3987 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 3988 3989 return bss_conf->he_support && 3990 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3991 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3992 own_he_cap && 3993 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3994 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3995 } 3996 ieee80211_assoc_config_link(struct ieee80211_link_data * link,struct link_sta_info * link_sta,struct cfg80211_bss * cbss,struct ieee80211_mgmt * mgmt,const u8 * elem_start,unsigned int elem_len,u64 * changed)3997 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3998 struct link_sta_info *link_sta, 3999 struct cfg80211_bss *cbss, 4000 struct ieee80211_mgmt *mgmt, 4001 const u8 *elem_start, 4002 unsigned int elem_len, 4003 u64 *changed) 4004 { 4005 struct ieee80211_sub_if_data *sdata = link->sdata; 4006 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4007 struct ieee80211_bss_conf *bss_conf = link->conf; 4008 struct ieee80211_local *local = sdata->local; 4009 unsigned int link_id = link->link_id; 4010 struct ieee80211_elems_parse_params parse_params = { 4011 .start = elem_start, 4012 .len = elem_len, 4013 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4014 .from_ap = true, 4015 }; 4016 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4017 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4018 const struct cfg80211_bss_ies *bss_ies = NULL; 4019 struct ieee80211_supported_band *sband; 4020 struct ieee802_11_elems *elems; 4021 const __le16 prof_bss_param_ch_present = 4022 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4023 u16 capab_info; 4024 bool ret; 4025 4026 elems = ieee802_11_parse_elems_full(&parse_params); 4027 if (!elems) 4028 return false; 4029 4030 if (link_id == assoc_data->assoc_link_id) { 4031 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4032 4033 /* 4034 * we should not get to this flow unless the association was 4035 * successful, so set the status directly to success 4036 */ 4037 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4038 if (elems->ml_basic) { 4039 if (!(elems->ml_basic->control & 4040 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT))) { 4041 ret = false; 4042 goto out; 4043 } 4044 link->u.mgd.bss_param_ch_cnt = 4045 ieee80211_mle_get_bss_param_ch_cnt(elems->ml_basic); 4046 } 4047 } else if (!elems->prof || 4048 !(elems->prof->control & prof_bss_param_ch_present)) { 4049 ret = false; 4050 goto out; 4051 } else { 4052 const u8 *ptr = elems->prof->variable + 4053 elems->prof->sta_info_len - 1; 4054 4055 /* 4056 * During parsing, we validated that these fields exist, 4057 * otherwise elems->prof would have been set to NULL. 4058 */ 4059 capab_info = get_unaligned_le16(ptr); 4060 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4061 link->u.mgd.bss_param_ch_cnt = 4062 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4063 4064 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4065 link_info(link, "association response status code=%u\n", 4066 assoc_data->link[link_id].status); 4067 ret = true; 4068 goto out; 4069 } 4070 } 4071 4072 if (!is_s1g && !elems->supp_rates) { 4073 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4074 ret = false; 4075 goto out; 4076 } 4077 4078 link->u.mgd.tdls_chan_switch_prohibited = 4079 elems->ext_capab && elems->ext_capab_len >= 5 && 4080 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4081 4082 /* 4083 * Some APs are erroneously not including some information in their 4084 * (re)association response frames. Try to recover by using the data 4085 * from the beacon or probe response. This seems to afflict mobile 4086 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4087 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4088 */ 4089 if (!is_6ghz && 4090 ((assoc_data->wmm && !elems->wmm_param) || 4091 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4092 (!elems->ht_cap_elem || !elems->ht_operation)) || 4093 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4094 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4095 const struct cfg80211_bss_ies *ies; 4096 struct ieee802_11_elems *bss_elems; 4097 4098 rcu_read_lock(); 4099 ies = rcu_dereference(cbss->ies); 4100 if (ies) 4101 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4102 GFP_ATOMIC); 4103 rcu_read_unlock(); 4104 if (!bss_ies) { 4105 ret = false; 4106 goto out; 4107 } 4108 4109 parse_params.start = bss_ies->data; 4110 parse_params.len = bss_ies->len; 4111 parse_params.bss = cbss; 4112 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4113 if (!bss_elems) { 4114 ret = false; 4115 goto out; 4116 } 4117 4118 if (assoc_data->wmm && 4119 !elems->wmm_param && bss_elems->wmm_param) { 4120 elems->wmm_param = bss_elems->wmm_param; 4121 sdata_info(sdata, 4122 "AP bug: WMM param missing from AssocResp\n"); 4123 } 4124 4125 /* 4126 * Also check if we requested HT/VHT, otherwise the AP doesn't 4127 * have to include the IEs in the (re)association response. 4128 */ 4129 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4130 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4131 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4132 sdata_info(sdata, 4133 "AP bug: HT capability missing from AssocResp\n"); 4134 } 4135 if (!elems->ht_operation && bss_elems->ht_operation && 4136 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4137 elems->ht_operation = bss_elems->ht_operation; 4138 sdata_info(sdata, 4139 "AP bug: HT operation missing from AssocResp\n"); 4140 } 4141 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4142 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4143 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4144 sdata_info(sdata, 4145 "AP bug: VHT capa missing from AssocResp\n"); 4146 } 4147 if (!elems->vht_operation && bss_elems->vht_operation && 4148 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4149 elems->vht_operation = bss_elems->vht_operation; 4150 sdata_info(sdata, 4151 "AP bug: VHT operation missing from AssocResp\n"); 4152 } 4153 4154 kfree(bss_elems); 4155 } 4156 4157 /* 4158 * We previously checked these in the beacon/probe response, so 4159 * they should be present here. This is just a safety net. 4160 */ 4161 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4162 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4163 sdata_info(sdata, 4164 "HT AP is missing WMM params or HT capability/operation\n"); 4165 ret = false; 4166 goto out; 4167 } 4168 4169 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4170 (!elems->vht_cap_elem || !elems->vht_operation)) { 4171 sdata_info(sdata, 4172 "VHT AP is missing VHT capability/operation\n"); 4173 ret = false; 4174 goto out; 4175 } 4176 4177 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4178 !elems->he_6ghz_capa) { 4179 sdata_info(sdata, 4180 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4181 ret = false; 4182 goto out; 4183 } 4184 4185 if (WARN_ON(!link->conf->chandef.chan)) { 4186 ret = false; 4187 goto out; 4188 } 4189 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4190 4191 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4192 (!elems->he_cap || !elems->he_operation)) { 4193 sdata_info(sdata, 4194 "HE AP is missing HE capability/operation\n"); 4195 ret = false; 4196 goto out; 4197 } 4198 4199 /* Set up internal HT/VHT capabilities */ 4200 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4201 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4202 elems->ht_cap_elem, 4203 link_sta); 4204 4205 if (elems->vht_cap_elem && 4206 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4207 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4208 const struct cfg80211_bss_ies *ies; 4209 4210 /* 4211 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4212 * too large maximum MPDU length in the association response 4213 * (indicating 12k) that it cannot actually process ... 4214 * Work around that. 4215 */ 4216 rcu_read_lock(); 4217 ies = rcu_dereference(cbss->ies); 4218 if (ies) { 4219 const struct element *elem; 4220 4221 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4222 ies->data, ies->len); 4223 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4224 bss_vht_cap = (const void *)elem->data; 4225 } 4226 4227 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4228 elems->vht_cap_elem, 4229 bss_vht_cap, link_sta); 4230 rcu_read_unlock(); 4231 } 4232 4233 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4234 elems->he_cap) { 4235 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4236 elems->he_cap, 4237 elems->he_cap_len, 4238 elems->he_6ghz_capa, 4239 link_sta); 4240 4241 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4242 if (elems->rsnx && elems->rsnx_len && 4243 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4244 wiphy_ext_feature_isset(local->hw.wiphy, 4245 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4246 bss_conf->twt_protected = true; 4247 else 4248 bss_conf->twt_protected = false; 4249 4250 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4251 link_sta, elems); 4252 4253 if (elems->eht_operation && elems->eht_cap && 4254 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4255 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4256 elems->he_cap, 4257 elems->he_cap_len, 4258 elems->eht_cap, 4259 elems->eht_cap_len, 4260 link_sta); 4261 4262 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4263 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4264 } else { 4265 bss_conf->eht_support = false; 4266 } 4267 } else { 4268 bss_conf->he_support = false; 4269 bss_conf->twt_requester = false; 4270 bss_conf->twt_protected = false; 4271 bss_conf->eht_support = false; 4272 } 4273 4274 bss_conf->twt_broadcast = 4275 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4276 4277 if (bss_conf->he_support) { 4278 bss_conf->he_bss_color.color = 4279 le32_get_bits(elems->he_operation->he_oper_params, 4280 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4281 bss_conf->he_bss_color.partial = 4282 le32_get_bits(elems->he_operation->he_oper_params, 4283 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4284 bss_conf->he_bss_color.enabled = 4285 !le32_get_bits(elems->he_operation->he_oper_params, 4286 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4287 4288 if (bss_conf->he_bss_color.enabled) 4289 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4290 4291 bss_conf->htc_trig_based_pkt_ext = 4292 le32_get_bits(elems->he_operation->he_oper_params, 4293 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4294 bss_conf->frame_time_rts_th = 4295 le32_get_bits(elems->he_operation->he_oper_params, 4296 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4297 4298 bss_conf->uora_exists = !!elems->uora_element; 4299 if (elems->uora_element) 4300 bss_conf->uora_ocw_range = elems->uora_element[0]; 4301 4302 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4303 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4304 /* TODO: OPEN: what happens if BSS color disable is set? */ 4305 } 4306 4307 if (cbss->transmitted_bss) { 4308 bss_conf->nontransmitted = true; 4309 ether_addr_copy(bss_conf->transmitter_bssid, 4310 cbss->transmitted_bss->bssid); 4311 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4312 bss_conf->bssid_index = cbss->bssid_index; 4313 } 4314 4315 /* 4316 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4317 * in their association response, so ignore that data for our own 4318 * configuration. If it changed since the last beacon, we'll get the 4319 * next beacon and update then. 4320 */ 4321 4322 /* 4323 * If an operating mode notification IE is present, override the 4324 * NSS calculation (that would be done in rate_control_rate_init()) 4325 * and use the # of streams from that element. 4326 */ 4327 if (elems->opmode_notif && 4328 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4329 u8 nss; 4330 4331 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4332 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4333 nss += 1; 4334 link_sta->pub->rx_nss = nss; 4335 } 4336 4337 /* 4338 * Always handle WMM once after association regardless 4339 * of the first value the AP uses. Setting -1 here has 4340 * that effect because the AP values is an unsigned 4341 * 4-bit value. 4342 */ 4343 link->u.mgd.wmm_last_param_set = -1; 4344 link->u.mgd.mu_edca_last_param_set = -1; 4345 4346 if (link->u.mgd.disable_wmm_tracking) { 4347 ieee80211_set_wmm_default(link, false, false); 4348 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4349 elems->wmm_param_len, 4350 elems->mu_edca_param_set)) { 4351 /* still enable QoS since we might have HT/VHT */ 4352 ieee80211_set_wmm_default(link, false, true); 4353 /* disable WMM tracking in this case to disable 4354 * tracking WMM parameter changes in the beacon if 4355 * the parameters weren't actually valid. Doing so 4356 * avoids changing parameters very strangely when 4357 * the AP is going back and forth between valid and 4358 * invalid parameters. 4359 */ 4360 link->u.mgd.disable_wmm_tracking = true; 4361 } 4362 4363 if (elems->max_idle_period_ie) { 4364 bss_conf->max_idle_period = 4365 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4366 bss_conf->protected_keep_alive = 4367 !!(elems->max_idle_period_ie->idle_options & 4368 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4369 *changed |= BSS_CHANGED_KEEP_ALIVE; 4370 } else { 4371 bss_conf->max_idle_period = 0; 4372 bss_conf->protected_keep_alive = false; 4373 } 4374 4375 /* set assoc capability (AID was already set earlier), 4376 * ieee80211_set_associated() will tell the driver */ 4377 bss_conf->assoc_capability = capab_info; 4378 4379 ret = true; 4380 out: 4381 kfree(elems); 4382 kfree(bss_ies); 4383 return ret; 4384 } 4385 ieee80211_mgd_setup_link_sta(struct ieee80211_link_data * link,struct sta_info * sta,struct link_sta_info * link_sta,struct cfg80211_bss * cbss)4386 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4387 struct sta_info *sta, 4388 struct link_sta_info *link_sta, 4389 struct cfg80211_bss *cbss) 4390 { 4391 struct ieee80211_sub_if_data *sdata = link->sdata; 4392 struct ieee80211_local *local = sdata->local; 4393 struct ieee80211_bss *bss = (void *)cbss->priv; 4394 u32 rates = 0, basic_rates = 0; 4395 bool have_higher_than_11mbit = false; 4396 int min_rate = INT_MAX, min_rate_index = -1; 4397 /* this is clearly wrong for MLO but we'll just remove it later */ 4398 int shift = ieee80211_vif_get_shift(&sdata->vif); 4399 struct ieee80211_supported_band *sband; 4400 4401 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4402 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4403 4404 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4405 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4406 ieee80211_s1g_sta_rate_init(sta); 4407 return 0; 4408 } 4409 4410 sband = local->hw.wiphy->bands[cbss->channel->band]; 4411 4412 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4413 &rates, &basic_rates, &have_higher_than_11mbit, 4414 &min_rate, &min_rate_index, shift); 4415 4416 /* 4417 * This used to be a workaround for basic rates missing 4418 * in the association response frame. Now that we no 4419 * longer use the basic rates from there, it probably 4420 * doesn't happen any more, but keep the workaround so 4421 * in case some *other* APs are buggy in different ways 4422 * we can connect -- with a warning. 4423 * Allow this workaround only in case the AP provided at least 4424 * one rate. 4425 */ 4426 if (min_rate_index < 0) { 4427 link_info(link, "No legacy rates in association response\n"); 4428 return -EINVAL; 4429 } else if (!basic_rates) { 4430 link_info(link, "No basic rates, using min rate instead\n"); 4431 basic_rates = BIT(min_rate_index); 4432 } 4433 4434 if (rates) 4435 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4436 else 4437 link_info(link, "No rates found, keeping mandatory only\n"); 4438 4439 link->conf->basic_rates = basic_rates; 4440 4441 /* cf. IEEE 802.11 9.2.12 */ 4442 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4443 have_higher_than_11mbit; 4444 4445 return 0; 4446 } 4447 ieee80211_max_rx_chains(struct ieee80211_link_data * link,struct cfg80211_bss * cbss)4448 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4449 struct cfg80211_bss *cbss) 4450 { 4451 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4452 const struct element *ht_cap_elem, *vht_cap_elem; 4453 const struct cfg80211_bss_ies *ies; 4454 const struct ieee80211_ht_cap *ht_cap; 4455 const struct ieee80211_vht_cap *vht_cap; 4456 const struct ieee80211_he_cap_elem *he_cap; 4457 const struct element *he_cap_elem; 4458 u16 mcs_80_map, mcs_160_map; 4459 int i, mcs_nss_size; 4460 bool support_160; 4461 u8 chains = 1; 4462 4463 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4464 return chains; 4465 4466 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4467 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4468 ht_cap = (void *)ht_cap_elem->data; 4469 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4470 /* 4471 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4472 * "Tx Unequal Modulation Supported" fields. 4473 */ 4474 } 4475 4476 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4477 return chains; 4478 4479 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4480 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4481 u8 nss; 4482 u16 tx_mcs_map; 4483 4484 vht_cap = (void *)vht_cap_elem->data; 4485 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4486 for (nss = 8; nss > 0; nss--) { 4487 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4488 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4489 break; 4490 } 4491 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4492 chains = max(chains, nss); 4493 } 4494 4495 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4496 return chains; 4497 4498 ies = rcu_dereference(cbss->ies); 4499 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4500 ies->data, ies->len); 4501 4502 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4503 return chains; 4504 4505 /* skip one byte ext_tag_id */ 4506 he_cap = (void *)(he_cap_elem->data + 1); 4507 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4508 4509 /* invalid HE IE */ 4510 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4511 return chains; 4512 4513 /* mcs_nss is right after he_cap info */ 4514 he_mcs_nss_supp = (void *)(he_cap + 1); 4515 4516 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4517 4518 for (i = 7; i >= 0; i--) { 4519 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4520 4521 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4522 chains = max_t(u8, chains, i + 1); 4523 break; 4524 } 4525 } 4526 4527 support_160 = he_cap->phy_cap_info[0] & 4528 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4529 4530 if (!support_160) 4531 return chains; 4532 4533 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4534 for (i = 7; i >= 0; i--) { 4535 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4536 4537 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4538 chains = max_t(u8, chains, i + 1); 4539 break; 4540 } 4541 } 4542 4543 return chains; 4544 } 4545 4546 static bool ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data * sdata,const struct cfg80211_bss_ies * ies,const struct ieee80211_he_operation * he_op)4547 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4548 const struct cfg80211_bss_ies *ies, 4549 const struct ieee80211_he_operation *he_op) 4550 { 4551 const struct element *he_cap_elem; 4552 const struct ieee80211_he_cap_elem *he_cap; 4553 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4554 u16 mcs_80_map_tx, mcs_80_map_rx; 4555 u16 ap_min_req_set; 4556 int mcs_nss_size; 4557 int nss; 4558 4559 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4560 ies->data, ies->len); 4561 4562 if (!he_cap_elem) 4563 return false; 4564 4565 /* invalid HE IE */ 4566 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4567 sdata_info(sdata, 4568 "Invalid HE elem, Disable HE\n"); 4569 return false; 4570 } 4571 4572 /* skip one byte ext_tag_id */ 4573 he_cap = (void *)(he_cap_elem->data + 1); 4574 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4575 4576 /* invalid HE IE */ 4577 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4578 sdata_info(sdata, 4579 "Invalid HE elem with nss size, Disable HE\n"); 4580 return false; 4581 } 4582 4583 /* mcs_nss is right after he_cap info */ 4584 he_mcs_nss_supp = (void *)(he_cap + 1); 4585 4586 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4587 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4588 4589 /* P802.11-REVme/D0.3 4590 * 27.1.1 Introduction to the HE PHY 4591 * ... 4592 * An HE STA shall support the following features: 4593 * ... 4594 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4595 * supported channel widths for HE SU PPDUs 4596 */ 4597 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4598 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4599 sdata_info(sdata, 4600 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4601 mcs_80_map_tx, mcs_80_map_rx); 4602 return false; 4603 } 4604 4605 if (!he_op) 4606 return true; 4607 4608 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4609 4610 /* 4611 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4612 * zeroes, which is nonsense, and completely inconsistent with itself 4613 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4614 */ 4615 if (!ap_min_req_set) 4616 return true; 4617 4618 /* make sure the AP is consistent with itself 4619 * 4620 * P802.11-REVme/D0.3 4621 * 26.17.1 Basic HE BSS operation 4622 * 4623 * A STA that is operating in an HE BSS shall be able to receive and 4624 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4625 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4626 * MLME-START.request primitive and shall be able to receive at each of 4627 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4628 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4629 * primitive 4630 */ 4631 for (nss = 8; nss > 0; nss--) { 4632 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4633 u8 ap_rx_val; 4634 u8 ap_tx_val; 4635 4636 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4637 continue; 4638 4639 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4640 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4641 4642 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4643 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4644 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4645 sdata_info(sdata, 4646 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4647 nss, ap_rx_val, ap_rx_val, ap_op_val); 4648 return false; 4649 } 4650 } 4651 4652 return true; 4653 } 4654 4655 static bool ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_he_operation * he_op)4656 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4657 struct ieee80211_supported_band *sband, 4658 const struct ieee80211_he_operation *he_op) 4659 { 4660 const struct ieee80211_sta_he_cap *sta_he_cap = 4661 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4662 u16 ap_min_req_set; 4663 int i; 4664 4665 if (!sta_he_cap || !he_op) 4666 return false; 4667 4668 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4669 4670 /* 4671 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4672 * zeroes, which is nonsense, and completely inconsistent with itself 4673 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4674 */ 4675 if (!ap_min_req_set) 4676 return true; 4677 4678 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4679 for (i = 0; i < 3; i++) { 4680 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4681 &sta_he_cap->he_mcs_nss_supp; 4682 u16 sta_mcs_map_rx = 4683 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4684 u16 sta_mcs_map_tx = 4685 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4686 u8 nss; 4687 bool verified = true; 4688 4689 /* 4690 * For each band there is a maximum of 8 spatial streams 4691 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4692 * of 2 bits per NSS (1-8), with the values defined in enum 4693 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4694 * capabilities aren't less than the AP's minimum requirements 4695 * for this HE BSS per SS. 4696 * It is enough to find one such band that meets the reqs. 4697 */ 4698 for (nss = 8; nss > 0; nss--) { 4699 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4700 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4701 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4702 4703 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4704 continue; 4705 4706 /* 4707 * Make sure the HE AP doesn't require MCSs that aren't 4708 * supported by the client as required by spec 4709 * 4710 * P802.11-REVme/D0.3 4711 * 26.17.1 Basic HE BSS operation 4712 * 4713 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4714 * a BSS, unless it supports (i.e., is able to both transmit and 4715 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4716 * HE-MCS and NSS set. 4717 */ 4718 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4719 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4720 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4721 verified = false; 4722 break; 4723 } 4724 } 4725 4726 if (verified) 4727 return true; 4728 } 4729 4730 /* If here, STA doesn't meet AP's HE min requirements */ 4731 return false; 4732 } 4733 4734 static u8 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap * sta_he_cap,const struct ieee80211_sta_eht_cap * sta_eht_cap,unsigned int idx,int bw)4735 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 4736 const struct ieee80211_sta_eht_cap *sta_eht_cap, 4737 unsigned int idx, int bw) 4738 { 4739 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 4740 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 4741 4742 /* handle us being a 20 MHz-only EHT STA - with four values 4743 * for MCS 0-7, 8-9, 10-11, 12-13. 4744 */ 4745 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 4746 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 4747 4748 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 4749 if (idx > 0) 4750 idx--; 4751 4752 switch (bw) { 4753 case 0: 4754 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 4755 case 1: 4756 if (!(he_phy_cap0 & 4757 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 4758 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 4759 return 0xff; /* pass check */ 4760 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 4761 case 2: 4762 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 4763 return 0xff; /* pass check */ 4764 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 4765 } 4766 4767 WARN_ON(1); 4768 return 0; 4769 } 4770 4771 static bool ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_eht_operation * eht_op)4772 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 4773 struct ieee80211_supported_band *sband, 4774 const struct ieee80211_eht_operation *eht_op) 4775 { 4776 const struct ieee80211_sta_he_cap *sta_he_cap = 4777 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4778 const struct ieee80211_sta_eht_cap *sta_eht_cap = 4779 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4780 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 4781 unsigned int i; 4782 4783 if (!sta_he_cap || !sta_eht_cap || !eht_op) 4784 return false; 4785 4786 req = &eht_op->basic_mcs_nss; 4787 4788 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 4789 u8 req_rx_nss, req_tx_nss; 4790 unsigned int bw; 4791 4792 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4793 IEEE80211_EHT_MCS_NSS_RX); 4794 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 4795 IEEE80211_EHT_MCS_NSS_TX); 4796 4797 for (bw = 0; bw < 3; bw++) { 4798 u8 have, have_rx_nss, have_tx_nss; 4799 4800 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 4801 sta_eht_cap, 4802 i, bw); 4803 have_rx_nss = u8_get_bits(have, 4804 IEEE80211_EHT_MCS_NSS_RX); 4805 have_tx_nss = u8_get_bits(have, 4806 IEEE80211_EHT_MCS_NSS_TX); 4807 4808 if (req_rx_nss > have_rx_nss || 4809 req_tx_nss > have_tx_nss) 4810 return false; 4811 } 4812 } 4813 4814 return true; 4815 } 4816 ieee80211_prep_channel(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,struct cfg80211_bss * cbss,ieee80211_conn_flags_t * conn_flags)4817 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4818 struct ieee80211_link_data *link, 4819 struct cfg80211_bss *cbss, 4820 ieee80211_conn_flags_t *conn_flags) 4821 { 4822 struct ieee80211_local *local = sdata->local; 4823 const struct ieee80211_ht_cap *ht_cap = NULL; 4824 const struct ieee80211_ht_operation *ht_oper = NULL; 4825 const struct ieee80211_vht_operation *vht_oper = NULL; 4826 const struct ieee80211_he_operation *he_oper = NULL; 4827 const struct ieee80211_eht_operation *eht_oper = NULL; 4828 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4829 struct ieee80211_supported_band *sband; 4830 struct cfg80211_chan_def chandef; 4831 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4832 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4833 struct ieee80211_bss *bss = (void *)cbss->priv; 4834 struct ieee80211_elems_parse_params parse_params = { 4835 .link_id = -1, 4836 .from_ap = true, 4837 }; 4838 struct ieee802_11_elems *elems; 4839 const struct cfg80211_bss_ies *ies; 4840 int ret; 4841 u32 i; 4842 bool have_80mhz; 4843 4844 rcu_read_lock(); 4845 4846 ies = rcu_dereference(cbss->ies); 4847 parse_params.start = ies->data; 4848 parse_params.len = ies->len; 4849 elems = ieee802_11_parse_elems_full(&parse_params); 4850 if (!elems) { 4851 rcu_read_unlock(); 4852 return -ENOMEM; 4853 } 4854 4855 sband = local->hw.wiphy->bands[cbss->channel->band]; 4856 4857 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4858 IEEE80211_CONN_DISABLE_80P80MHZ | 4859 IEEE80211_CONN_DISABLE_160MHZ); 4860 4861 /* disable HT/VHT/HE if we don't support them */ 4862 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4863 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4864 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4865 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4866 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4867 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4868 } 4869 4870 if (!sband->vht_cap.vht_supported && is_5ghz) { 4871 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4872 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4873 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4874 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4875 } 4876 4877 if (!ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) { 4878 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4879 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4880 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4881 } 4882 4883 if (!ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) { 4884 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4885 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4886 } 4887 4888 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4889 ht_oper = elems->ht_operation; 4890 ht_cap = elems->ht_cap_elem; 4891 4892 if (!ht_cap) { 4893 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4894 ht_oper = NULL; 4895 } 4896 } 4897 4898 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4899 vht_oper = elems->vht_operation; 4900 if (vht_oper && !ht_oper) { 4901 vht_oper = NULL; 4902 sdata_info(sdata, 4903 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4904 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4905 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4906 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4907 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4908 } 4909 4910 if (!elems->vht_cap_elem) { 4911 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4912 vht_oper = NULL; 4913 } 4914 } 4915 4916 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4917 he_oper = elems->he_operation; 4918 4919 if (link && is_6ghz) { 4920 struct ieee80211_bss_conf *bss_conf; 4921 u8 j = 0; 4922 4923 bss_conf = link->conf; 4924 4925 if (elems->pwr_constr_elem) 4926 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4927 4928 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4929 ARRAY_SIZE(elems->tx_pwr_env)); 4930 4931 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4932 if (elems->tx_pwr_env_len[i] > 4933 sizeof(bss_conf->tx_pwr_env[j])) 4934 continue; 4935 4936 bss_conf->tx_pwr_env_num++; 4937 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4938 elems->tx_pwr_env_len[i]); 4939 j++; 4940 } 4941 } 4942 4943 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4944 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4945 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4946 IEEE80211_CONN_DISABLE_EHT; 4947 } 4948 4949 /* 4950 * EHT requires HE to be supported as well. Specifically for 6 GHz 4951 * channels, the operation channel information can only be deduced from 4952 * both the 6 GHz operation information (from the HE operation IE) and 4953 * EHT operation. 4954 */ 4955 if (!(*conn_flags & 4956 (IEEE80211_CONN_DISABLE_HE | 4957 IEEE80211_CONN_DISABLE_EHT)) && 4958 he_oper) { 4959 const struct cfg80211_bss_ies *cbss_ies; 4960 const struct element *eht_ml_elem; 4961 const u8 *eht_oper_ie; 4962 4963 cbss_ies = rcu_dereference(cbss->ies); 4964 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4965 cbss_ies->data, cbss_ies->len); 4966 if (eht_oper_ie && eht_oper_ie[1] >= 4967 1 + sizeof(struct ieee80211_eht_operation)) 4968 eht_oper = (void *)(eht_oper_ie + 3); 4969 else 4970 eht_oper = NULL; 4971 4972 if (!ieee80211_verify_sta_eht_mcs_support(sdata, sband, eht_oper)) 4973 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4974 4975 eht_ml_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 4976 cbss_ies->data, cbss_ies->len); 4977 4978 /* data + 1 / datalen - 1 since it's an extended element */ 4979 if (!(*conn_flags & IEEE80211_CONN_DISABLE_EHT) && 4980 eht_ml_elem && 4981 ieee80211_mle_type_ok(eht_ml_elem->data + 1, 4982 IEEE80211_ML_CONTROL_TYPE_BASIC, 4983 eht_ml_elem->datalen - 1)) { 4984 sdata->vif.cfg.eml_cap = 4985 ieee80211_mle_get_eml_cap(eht_ml_elem->data + 1); 4986 sdata->vif.cfg.eml_med_sync_delay = 4987 ieee80211_mle_get_eml_med_sync_delay(eht_ml_elem->data + 1); 4988 } 4989 } 4990 4991 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4992 have_80mhz = false; 4993 for (i = 0; i < sband->n_channels; i++) { 4994 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4995 IEEE80211_CHAN_NO_80MHZ)) 4996 continue; 4997 4998 have_80mhz = true; 4999 break; 5000 } 5001 5002 if (!have_80mhz) { 5003 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 5004 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 5005 } 5006 5007 if (sband->band == NL80211_BAND_S1GHZ) { 5008 s1g_oper = elems->s1g_oper; 5009 if (!s1g_oper) 5010 sdata_info(sdata, 5011 "AP missing S1G operation element?\n"); 5012 } 5013 5014 *conn_flags |= 5015 ieee80211_determine_chantype(sdata, link, *conn_flags, 5016 sband, 5017 cbss->channel, 5018 bss->vht_cap_info, 5019 ht_oper, vht_oper, 5020 he_oper, eht_oper, 5021 s1g_oper, 5022 &chandef, false); 5023 5024 if (link) 5025 link->needed_rx_chains = 5026 min(ieee80211_max_rx_chains(link, cbss), 5027 local->rx_chains); 5028 5029 rcu_read_unlock(); 5030 /* the element data was RCU protected so no longer valid anyway */ 5031 kfree(elems); 5032 elems = NULL; 5033 5034 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 5035 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5036 return -EINVAL; 5037 } 5038 5039 if (!link) 5040 return 0; 5041 5042 /* will change later if needed */ 5043 link->smps_mode = IEEE80211_SMPS_OFF; 5044 5045 mutex_lock(&local->mtx); 5046 /* 5047 * If this fails (possibly due to channel context sharing 5048 * on incompatible channels, e.g. 80+80 and 160 sharing the 5049 * same control channel) try to use a smaller bandwidth. 5050 */ 5051 ret = ieee80211_link_use_channel(link, &chandef, 5052 IEEE80211_CHANCTX_SHARED); 5053 5054 /* don't downgrade for 5 and 10 MHz channels, though. */ 5055 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5056 chandef.width == NL80211_CHAN_WIDTH_10) 5057 goto out; 5058 5059 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5060 *conn_flags |= 5061 ieee80211_chandef_downgrade(&chandef); 5062 ret = ieee80211_link_use_channel(link, &chandef, 5063 IEEE80211_CHANCTX_SHARED); 5064 } 5065 out: 5066 mutex_unlock(&local->mtx); 5067 return ret; 5068 } 5069 ieee80211_get_dtim(const struct cfg80211_bss_ies * ies,u8 * dtim_count,u8 * dtim_period)5070 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5071 u8 *dtim_count, u8 *dtim_period) 5072 { 5073 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5074 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5075 ies->len); 5076 const struct ieee80211_tim_ie *tim = NULL; 5077 const struct ieee80211_bssid_index *idx; 5078 bool valid = tim_ie && tim_ie[1] >= 2; 5079 5080 if (valid) 5081 tim = (void *)(tim_ie + 2); 5082 5083 if (dtim_count) 5084 *dtim_count = valid ? tim->dtim_count : 0; 5085 5086 if (dtim_period) 5087 *dtim_period = valid ? tim->dtim_period : 0; 5088 5089 /* Check if value is overridden by non-transmitted profile */ 5090 if (!idx_ie || idx_ie[1] < 3) 5091 return valid; 5092 5093 idx = (void *)(idx_ie + 2); 5094 5095 if (dtim_count) 5096 *dtim_count = idx->dtim_count; 5097 5098 if (dtim_period) 5099 *dtim_period = idx->dtim_period; 5100 5101 return true; 5102 } 5103 ieee80211_assoc_success(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,struct ieee802_11_elems * elems,const u8 * elem_start,unsigned int elem_len)5104 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5105 struct ieee80211_mgmt *mgmt, 5106 struct ieee802_11_elems *elems, 5107 const u8 *elem_start, unsigned int elem_len) 5108 { 5109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5110 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5111 struct ieee80211_local *local = sdata->local; 5112 unsigned int link_id; 5113 struct sta_info *sta; 5114 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5115 u16 valid_links = 0, dormant_links = 0; 5116 int err; 5117 5118 mutex_lock(&sdata->local->sta_mtx); 5119 /* 5120 * station info was already allocated and inserted before 5121 * the association and should be available to us 5122 */ 5123 sta = sta_info_get(sdata, assoc_data->ap_addr); 5124 if (WARN_ON(!sta)) 5125 goto out_err; 5126 5127 if (ieee80211_vif_is_mld(&sdata->vif)) { 5128 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5129 if (!assoc_data->link[link_id].bss) 5130 continue; 5131 5132 valid_links |= BIT(link_id); 5133 if (assoc_data->link[link_id].disabled) 5134 dormant_links |= BIT(link_id); 5135 5136 if (link_id != assoc_data->assoc_link_id) { 5137 err = ieee80211_sta_allocate_link(sta, link_id); 5138 if (err) 5139 goto out_err; 5140 } 5141 } 5142 5143 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5144 } 5145 5146 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5147 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5148 struct ieee80211_link_data *link; 5149 struct link_sta_info *link_sta; 5150 5151 if (!cbss) 5152 continue; 5153 5154 link = sdata_dereference(sdata->link[link_id], sdata); 5155 if (WARN_ON(!link)) 5156 goto out_err; 5157 5158 if (ieee80211_vif_is_mld(&sdata->vif)) 5159 link_info(link, 5160 "local address %pM, AP link address %pM%s\n", 5161 link->conf->addr, 5162 assoc_data->link[link_id].bss->bssid, 5163 link_id == assoc_data->assoc_link_id ? 5164 " (assoc)" : ""); 5165 5166 link_sta = rcu_dereference_protected(sta->link[link_id], 5167 lockdep_is_held(&local->sta_mtx)); 5168 if (WARN_ON(!link_sta)) 5169 goto out_err; 5170 5171 if (!link->u.mgd.have_beacon) { 5172 const struct cfg80211_bss_ies *ies; 5173 5174 rcu_read_lock(); 5175 ies = rcu_dereference(cbss->beacon_ies); 5176 if (ies) 5177 link->u.mgd.have_beacon = true; 5178 else 5179 ies = rcu_dereference(cbss->ies); 5180 ieee80211_get_dtim(ies, 5181 &link->conf->sync_dtim_count, 5182 &link->u.mgd.dtim_period); 5183 link->conf->beacon_int = cbss->beacon_interval; 5184 rcu_read_unlock(); 5185 } 5186 5187 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5188 5189 if (link_id != assoc_data->assoc_link_id) { 5190 err = ieee80211_prep_channel(sdata, link, cbss, 5191 &link->u.mgd.conn_flags); 5192 if (err) { 5193 link_info(link, "prep_channel failed\n"); 5194 goto out_err; 5195 } 5196 } 5197 5198 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5199 assoc_data->link[link_id].bss); 5200 if (err) 5201 goto out_err; 5202 5203 if (!ieee80211_assoc_config_link(link, link_sta, 5204 assoc_data->link[link_id].bss, 5205 mgmt, elem_start, elem_len, 5206 &changed[link_id])) 5207 goto out_err; 5208 5209 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5210 valid_links &= ~BIT(link_id); 5211 ieee80211_sta_remove_link(sta, link_id); 5212 continue; 5213 } 5214 5215 if (link_id != assoc_data->assoc_link_id) { 5216 err = ieee80211_sta_activate_link(sta, link_id); 5217 if (err) 5218 goto out_err; 5219 } 5220 } 5221 5222 /* links might have changed due to rejected ones, set them again */ 5223 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5224 5225 rate_control_rate_init(sta); 5226 5227 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5228 set_sta_flag(sta, WLAN_STA_MFP); 5229 sta->sta.mfp = true; 5230 } else { 5231 sta->sta.mfp = false; 5232 } 5233 5234 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5235 elems->ext_capab_len); 5236 5237 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5238 local->hw.queues >= IEEE80211_NUM_ACS; 5239 5240 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5241 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5242 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5243 if (err) { 5244 sdata_info(sdata, 5245 "failed to move station %pM to desired state\n", 5246 sta->sta.addr); 5247 WARN_ON(__sta_info_destroy(sta)); 5248 goto out_err; 5249 } 5250 5251 if (sdata->wdev.use_4addr) 5252 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5253 5254 mutex_unlock(&sdata->local->sta_mtx); 5255 5256 ieee80211_set_associated(sdata, assoc_data, changed); 5257 5258 /* 5259 * If we're using 4-addr mode, let the AP know that we're 5260 * doing so, so that it can create the STA VLAN on its side 5261 */ 5262 if (ifmgd->use_4addr) 5263 ieee80211_send_4addr_nullfunc(local, sdata); 5264 5265 /* 5266 * Start timer to probe the connection to the AP now. 5267 * Also start the timer that will detect beacon loss. 5268 */ 5269 ieee80211_sta_reset_beacon_monitor(sdata); 5270 ieee80211_sta_reset_conn_monitor(sdata); 5271 5272 return true; 5273 out_err: 5274 eth_zero_addr(sdata->vif.cfg.ap_addr); 5275 mutex_unlock(&sdata->local->sta_mtx); 5276 return false; 5277 } 5278 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)5279 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5280 struct ieee80211_mgmt *mgmt, 5281 size_t len) 5282 { 5283 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5284 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5285 u16 capab_info, status_code, aid; 5286 struct ieee80211_elems_parse_params parse_params = { 5287 .bss = NULL, 5288 .link_id = -1, 5289 .from_ap = true, 5290 }; 5291 struct ieee802_11_elems *elems; 5292 int ac; 5293 const u8 *elem_start; 5294 unsigned int elem_len; 5295 bool reassoc; 5296 struct ieee80211_event event = { 5297 .type = MLME_EVENT, 5298 .u.mlme.data = ASSOC_EVENT, 5299 }; 5300 struct ieee80211_prep_tx_info info = {}; 5301 struct cfg80211_rx_assoc_resp resp = { 5302 .uapsd_queues = -1, 5303 }; 5304 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5305 unsigned int link_id; 5306 5307 sdata_assert_lock(sdata); 5308 5309 if (!assoc_data) 5310 return; 5311 5312 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5313 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5314 return; 5315 5316 /* 5317 * AssocResp and ReassocResp have identical structure, so process both 5318 * of them in this function. 5319 */ 5320 5321 if (len < 24 + 6) 5322 return; 5323 5324 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5325 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5326 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5327 if (assoc_data->s1g) 5328 elem_start = mgmt->u.s1g_assoc_resp.variable; 5329 else 5330 elem_start = mgmt->u.assoc_resp.variable; 5331 5332 /* 5333 * Note: this may not be perfect, AP might misbehave - if 5334 * anyone needs to rely on perfect complete notification 5335 * with the exact right subtype, then we need to track what 5336 * we actually transmitted. 5337 */ 5338 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5339 IEEE80211_STYPE_ASSOC_REQ; 5340 5341 if (assoc_data->fils_kek_len && 5342 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5343 return; 5344 5345 elem_len = len - (elem_start - (u8 *)mgmt); 5346 parse_params.start = elem_start; 5347 parse_params.len = elem_len; 5348 elems = ieee802_11_parse_elems_full(&parse_params); 5349 if (!elems) 5350 goto notify_driver; 5351 5352 if (elems->aid_resp) 5353 aid = le16_to_cpu(elems->aid_resp->aid); 5354 else if (assoc_data->s1g) 5355 aid = 0; /* TODO */ 5356 else 5357 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5358 5359 /* 5360 * The 5 MSB of the AID field are reserved 5361 * (802.11-2016 9.4.1.8 AID field) 5362 */ 5363 aid &= 0x7ff; 5364 5365 sdata_info(sdata, 5366 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5367 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5368 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5369 5370 ifmgd->broken_ap = false; 5371 5372 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5373 elems->timeout_int && 5374 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5375 u32 tu, ms; 5376 5377 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5378 le32_to_cpu(elems->timeout_int->value)); 5379 5380 tu = le32_to_cpu(elems->timeout_int->value); 5381 ms = tu * 1024 / 1000; 5382 sdata_info(sdata, 5383 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5384 assoc_data->ap_addr, tu, ms); 5385 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5386 assoc_data->timeout_started = true; 5387 if (ms > IEEE80211_ASSOC_TIMEOUT) 5388 run_again(sdata, assoc_data->timeout); 5389 goto notify_driver; 5390 } 5391 5392 if (status_code != WLAN_STATUS_SUCCESS) { 5393 sdata_info(sdata, "%pM denied association (code=%d)\n", 5394 assoc_data->ap_addr, status_code); 5395 event.u.mlme.status = MLME_DENIED; 5396 event.u.mlme.reason = status_code; 5397 drv_event_callback(sdata->local, sdata, &event); 5398 } else { 5399 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5400 sdata_info(sdata, 5401 "invalid AID value %d (out of range), turn off PS\n", 5402 aid); 5403 aid = 0; 5404 ifmgd->broken_ap = true; 5405 } 5406 5407 if (ieee80211_vif_is_mld(&sdata->vif)) { 5408 if (!elems->ml_basic) { 5409 sdata_info(sdata, 5410 "MLO association with %pM but no multi-link element in response!\n", 5411 assoc_data->ap_addr); 5412 goto abandon_assoc; 5413 } 5414 5415 if (le16_get_bits(elems->ml_basic->control, 5416 IEEE80211_ML_CONTROL_TYPE) != 5417 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5418 sdata_info(sdata, 5419 "bad multi-link element (control=0x%x)\n", 5420 le16_to_cpu(elems->ml_basic->control)); 5421 goto abandon_assoc; 5422 } else { 5423 struct ieee80211_mle_basic_common_info *common; 5424 5425 common = (void *)elems->ml_basic->variable; 5426 5427 if (memcmp(assoc_data->ap_addr, 5428 common->mld_mac_addr, ETH_ALEN)) { 5429 sdata_info(sdata, 5430 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5431 common->mld_mac_addr, 5432 assoc_data->ap_addr); 5433 goto abandon_assoc; 5434 } 5435 } 5436 } 5437 5438 sdata->vif.cfg.aid = aid; 5439 5440 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5441 elem_start, elem_len)) { 5442 /* oops -- internal error -- send timeout for now */ 5443 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5444 goto notify_driver; 5445 } 5446 event.u.mlme.status = MLME_SUCCESS; 5447 drv_event_callback(sdata->local, sdata, &event); 5448 sdata_info(sdata, "associated\n"); 5449 5450 info.success = 1; 5451 } 5452 5453 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5454 struct ieee80211_link_data *link; 5455 5456 if (!assoc_data->link[link_id].bss) 5457 continue; 5458 5459 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5460 ether_addr_copy(resp.links[link_id].addr, 5461 assoc_data->link[link_id].addr); 5462 resp.links[link_id].status = assoc_data->link[link_id].status; 5463 5464 link = sdata_dereference(sdata->link[link_id], sdata); 5465 if (!link) 5466 continue; 5467 5468 /* get uapsd queues configuration - same for all links */ 5469 resp.uapsd_queues = 0; 5470 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5471 if (link->tx_conf[ac].uapsd) 5472 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5473 } 5474 5475 if (ieee80211_vif_is_mld(&sdata->vif)) { 5476 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5477 resp.ap_mld_addr = ap_mld_addr; 5478 } 5479 5480 ieee80211_destroy_assoc_data(sdata, 5481 status_code == WLAN_STATUS_SUCCESS ? 5482 ASSOC_SUCCESS : 5483 ASSOC_REJECTED); 5484 5485 resp.buf = (u8 *)mgmt; 5486 resp.len = len; 5487 resp.req_ies = ifmgd->assoc_req_ies; 5488 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5489 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5490 notify_driver: 5491 drv_mgd_complete_tx(sdata->local, sdata, &info); 5492 kfree(elems); 5493 return; 5494 abandon_assoc: 5495 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5496 goto notify_driver; 5497 } 5498 ieee80211_rx_bss_info(struct ieee80211_link_data * link,struct ieee80211_mgmt * mgmt,size_t len,struct ieee80211_rx_status * rx_status)5499 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5500 struct ieee80211_mgmt *mgmt, size_t len, 5501 struct ieee80211_rx_status *rx_status) 5502 { 5503 struct ieee80211_sub_if_data *sdata = link->sdata; 5504 struct ieee80211_local *local = sdata->local; 5505 struct ieee80211_bss *bss; 5506 struct ieee80211_channel *channel; 5507 5508 sdata_assert_lock(sdata); 5509 5510 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5511 ieee80211_rx_status_to_khz(rx_status)); 5512 if (!channel) 5513 return; 5514 5515 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5516 if (bss) { 5517 link->conf->beacon_rate = bss->beacon_rate; 5518 ieee80211_rx_bss_put(local, bss); 5519 } 5520 } 5521 5522 ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data * link,struct sk_buff * skb)5523 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5524 struct sk_buff *skb) 5525 { 5526 struct ieee80211_sub_if_data *sdata = link->sdata; 5527 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5528 struct ieee80211_if_managed *ifmgd; 5529 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5530 struct ieee80211_channel *channel; 5531 size_t baselen, len = skb->len; 5532 5533 ifmgd = &sdata->u.mgd; 5534 5535 sdata_assert_lock(sdata); 5536 5537 /* 5538 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5539 * "If a 6 GHz AP receives a Probe Request frame and responds with 5540 * a Probe Response frame [..], the Address 1 field of the Probe 5541 * Response frame shall be set to the broadcast address [..]" 5542 * So, on 6GHz band we should also accept broadcast responses. 5543 */ 5544 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5545 rx_status->freq); 5546 if (!channel) 5547 return; 5548 5549 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5550 (channel->band != NL80211_BAND_6GHZ || 5551 !is_broadcast_ether_addr(mgmt->da))) 5552 return; /* ignore ProbeResp to foreign address */ 5553 5554 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5555 if (baselen > len) 5556 return; 5557 5558 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5559 5560 if (ifmgd->associated && 5561 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5562 ieee80211_reset_ap_probe(sdata); 5563 } 5564 5565 /* 5566 * This is the canonical list of information elements we care about, 5567 * the filter code also gives us all changes to the Microsoft OUI 5568 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5569 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5570 * changes to requested client power. 5571 * 5572 * We implement beacon filtering in software since that means we can 5573 * avoid processing the frame here and in cfg80211, and userspace 5574 * will not be able to tell whether the hardware supports it or not. 5575 * 5576 * XXX: This list needs to be dynamic -- userspace needs to be able to 5577 * add items it requires. It also needs to be able to tell us to 5578 * look out for other vendor IEs. 5579 */ 5580 static const u64 care_about_ies = 5581 (1ULL << WLAN_EID_COUNTRY) | 5582 (1ULL << WLAN_EID_ERP_INFO) | 5583 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5584 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5585 (1ULL << WLAN_EID_HT_CAPABILITY) | 5586 (1ULL << WLAN_EID_HT_OPERATION) | 5587 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5588 ieee80211_handle_beacon_sig(struct ieee80211_link_data * link,struct ieee80211_if_managed * ifmgd,struct ieee80211_bss_conf * bss_conf,struct ieee80211_local * local,struct ieee80211_rx_status * rx_status)5589 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5590 struct ieee80211_if_managed *ifmgd, 5591 struct ieee80211_bss_conf *bss_conf, 5592 struct ieee80211_local *local, 5593 struct ieee80211_rx_status *rx_status) 5594 { 5595 struct ieee80211_sub_if_data *sdata = link->sdata; 5596 5597 /* Track average RSSI from the Beacon frames of the current AP */ 5598 5599 if (!link->u.mgd.tracking_signal_avg) { 5600 link->u.mgd.tracking_signal_avg = true; 5601 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5602 link->u.mgd.last_cqm_event_signal = 0; 5603 link->u.mgd.count_beacon_signal = 1; 5604 link->u.mgd.last_ave_beacon_signal = 0; 5605 } else { 5606 link->u.mgd.count_beacon_signal++; 5607 } 5608 5609 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5610 -rx_status->signal); 5611 5612 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5613 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5614 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5615 int last_sig = link->u.mgd.last_ave_beacon_signal; 5616 struct ieee80211_event event = { 5617 .type = RSSI_EVENT, 5618 }; 5619 5620 /* 5621 * if signal crosses either of the boundaries, invoke callback 5622 * with appropriate parameters 5623 */ 5624 if (sig > ifmgd->rssi_max_thold && 5625 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5626 link->u.mgd.last_ave_beacon_signal = sig; 5627 event.u.rssi.data = RSSI_EVENT_HIGH; 5628 drv_event_callback(local, sdata, &event); 5629 } else if (sig < ifmgd->rssi_min_thold && 5630 (last_sig >= ifmgd->rssi_max_thold || 5631 last_sig == 0)) { 5632 link->u.mgd.last_ave_beacon_signal = sig; 5633 event.u.rssi.data = RSSI_EVENT_LOW; 5634 drv_event_callback(local, sdata, &event); 5635 } 5636 } 5637 5638 if (bss_conf->cqm_rssi_thold && 5639 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5640 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5641 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5642 int last_event = link->u.mgd.last_cqm_event_signal; 5643 int thold = bss_conf->cqm_rssi_thold; 5644 int hyst = bss_conf->cqm_rssi_hyst; 5645 5646 if (sig < thold && 5647 (last_event == 0 || sig < last_event - hyst)) { 5648 link->u.mgd.last_cqm_event_signal = sig; 5649 ieee80211_cqm_rssi_notify( 5650 &sdata->vif, 5651 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5652 sig, GFP_KERNEL); 5653 } else if (sig > thold && 5654 (last_event == 0 || sig > last_event + hyst)) { 5655 link->u.mgd.last_cqm_event_signal = sig; 5656 ieee80211_cqm_rssi_notify( 5657 &sdata->vif, 5658 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5659 sig, GFP_KERNEL); 5660 } 5661 } 5662 5663 if (bss_conf->cqm_rssi_low && 5664 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5665 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5666 int last_event = link->u.mgd.last_cqm_event_signal; 5667 int low = bss_conf->cqm_rssi_low; 5668 int high = bss_conf->cqm_rssi_high; 5669 5670 if (sig < low && 5671 (last_event == 0 || last_event >= low)) { 5672 link->u.mgd.last_cqm_event_signal = sig; 5673 ieee80211_cqm_rssi_notify( 5674 &sdata->vif, 5675 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5676 sig, GFP_KERNEL); 5677 } else if (sig > high && 5678 (last_event == 0 || last_event <= high)) { 5679 link->u.mgd.last_cqm_event_signal = sig; 5680 ieee80211_cqm_rssi_notify( 5681 &sdata->vif, 5682 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5683 sig, GFP_KERNEL); 5684 } 5685 } 5686 } 5687 ieee80211_rx_our_beacon(const u8 * tx_bssid,struct cfg80211_bss * bss)5688 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5689 struct cfg80211_bss *bss) 5690 { 5691 if (ether_addr_equal(tx_bssid, bss->bssid)) 5692 return true; 5693 if (!bss->transmitted_bss) 5694 return false; 5695 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5696 } 5697 ieee80211_config_puncturing(struct ieee80211_link_data * link,const struct ieee80211_eht_operation * eht_oper,u64 * changed)5698 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5699 const struct ieee80211_eht_operation *eht_oper, 5700 u64 *changed) 5701 { 5702 u16 bitmap = 0, extracted; 5703 5704 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5705 (eht_oper->params & 5706 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5707 const struct ieee80211_eht_operation_info *info = 5708 (void *)eht_oper->optional; 5709 const u8 *disable_subchannel_bitmap = info->optional; 5710 5711 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5712 } 5713 5714 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5715 &link->conf->chandef, 5716 bitmap); 5717 5718 /* accept if there are no changes */ 5719 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5720 extracted == link->conf->eht_puncturing) 5721 return true; 5722 5723 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5724 &link->conf->chandef)) { 5725 link_info(link, 5726 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5727 link->u.mgd.bssid, 5728 bitmap, 5729 link->conf->chandef.width); 5730 return false; 5731 } 5732 5733 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5734 return true; 5735 } 5736 ieee80211_ml_reconf_work(struct wiphy * wiphy,struct wiphy_work * work)5737 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 5738 struct wiphy_work *work) 5739 { 5740 struct ieee80211_sub_if_data *sdata = 5741 container_of(work, struct ieee80211_sub_if_data, 5742 u.mgd.ml_reconf_work.work); 5743 u16 new_valid_links, new_active_links, new_dormant_links; 5744 int ret; 5745 5746 sdata_lock(sdata); 5747 if (!sdata->u.mgd.removed_links) { 5748 sdata_unlock(sdata); 5749 return; 5750 } 5751 5752 sdata_info(sdata, 5753 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 5754 sdata->vif.valid_links, sdata->u.mgd.removed_links); 5755 5756 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 5757 if (new_valid_links == sdata->vif.valid_links) { 5758 sdata_unlock(sdata); 5759 return; 5760 } 5761 5762 if (!new_valid_links || 5763 !(new_valid_links & ~sdata->vif.dormant_links)) { 5764 sdata_info(sdata, "No valid links after reconfiguration\n"); 5765 ret = -EINVAL; 5766 goto out; 5767 } 5768 5769 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 5770 if (new_active_links != sdata->vif.active_links) { 5771 if (!new_active_links) 5772 new_active_links = 5773 BIT(ffs(new_valid_links & 5774 ~sdata->vif.dormant_links) - 1); 5775 5776 ret = __ieee80211_set_active_links(&sdata->vif, 5777 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 out: 5793 if (!ret) 5794 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 5795 else 5796 ___ieee80211_disconnect(sdata); 5797 5798 sdata->u.mgd.removed_links = 0; 5799 5800 sdata_unlock(sdata); 5801 } 5802 ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems)5803 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 5804 struct ieee802_11_elems *elems) 5805 { 5806 const struct ieee80211_multi_link_elem *ml; 5807 const struct element *sub; 5808 ssize_t ml_len; 5809 unsigned long removed_links = 0; 5810 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5811 u8 link_id; 5812 u32 delay; 5813 5814 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 5815 return; 5816 5817 ml_len = cfg80211_defragment_element(elems->ml_reconf_elem, 5818 elems->ie_start, 5819 elems->total_len, 5820 elems->scratch_pos, 5821 elems->scratch + elems->scratch_len - 5822 elems->scratch_pos, 5823 WLAN_EID_FRAGMENT); 5824 if (ml_len < 0) 5825 return; 5826 5827 elems->ml_reconf = (const void *)elems->scratch_pos; 5828 elems->ml_reconf_len = ml_len; 5829 ml = elems->ml_reconf; 5830 5831 /* Directly parse the sub elements as the common information doesn't 5832 * hold any useful information. 5833 */ 5834 for_each_mle_subelement(sub, (u8 *)ml, ml_len) { 5835 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 5836 u8 *pos = prof->variable; 5837 u16 control; 5838 5839 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 5840 continue; 5841 5842 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 5843 sub->datalen)) 5844 return; 5845 5846 control = le16_to_cpu(prof->control); 5847 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 5848 5849 removed_links |= BIT(link_id); 5850 5851 /* the MAC address should not be included, but handle it */ 5852 if (control & 5853 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 5854 pos += 6; 5855 5856 /* According to Draft P802.11be_D3.0, the control should 5857 * include the AP Removal Timer present. If the AP Removal Timer 5858 * is not present assume immediate removal. 5859 */ 5860 if (control & 5861 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 5862 link_removal_timeout[link_id] = get_unaligned_le16(pos); 5863 } 5864 5865 removed_links &= sdata->vif.valid_links; 5866 if (!removed_links) { 5867 /* In case the removal was cancelled, abort it */ 5868 if (sdata->u.mgd.removed_links) { 5869 sdata->u.mgd.removed_links = 0; 5870 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 5871 &sdata->u.mgd.ml_reconf_work); 5872 } 5873 return; 5874 } 5875 5876 delay = 0; 5877 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 5878 struct ieee80211_bss_conf *link_conf = 5879 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 5880 u32 link_delay; 5881 5882 if (!link_conf) { 5883 removed_links &= ~BIT(link_id); 5884 continue; 5885 } 5886 5887 if (link_removal_timeout[link_id] < 1) 5888 link_delay = 0; 5889 else 5890 link_delay = link_conf->beacon_int * 5891 (link_removal_timeout[link_id] - 1); 5892 5893 if (!delay) 5894 delay = link_delay; 5895 else 5896 delay = min(delay, link_delay); 5897 } 5898 5899 sdata->u.mgd.removed_links = removed_links; 5900 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 5901 &sdata->u.mgd.ml_reconf_work, 5902 TU_TO_JIFFIES(delay)); 5903 } 5904 ieee80211_rx_mgmt_beacon(struct ieee80211_link_data * link,struct ieee80211_hdr * hdr,size_t len,struct ieee80211_rx_status * rx_status)5905 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5906 struct ieee80211_hdr *hdr, size_t len, 5907 struct ieee80211_rx_status *rx_status) 5908 { 5909 struct ieee80211_sub_if_data *sdata = link->sdata; 5910 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5911 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5912 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5913 struct ieee80211_mgmt *mgmt = (void *) hdr; 5914 size_t baselen; 5915 struct ieee802_11_elems *elems; 5916 struct ieee80211_local *local = sdata->local; 5917 struct ieee80211_chanctx_conf *chanctx_conf; 5918 struct ieee80211_supported_band *sband; 5919 struct ieee80211_channel *chan; 5920 struct link_sta_info *link_sta; 5921 struct sta_info *sta; 5922 u64 changed = 0; 5923 bool erp_valid; 5924 u8 erp_value = 0; 5925 u32 ncrc = 0; 5926 u8 *bssid, *variable = mgmt->u.beacon.variable; 5927 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5928 struct ieee80211_elems_parse_params parse_params = { 5929 .link_id = -1, 5930 .from_ap = true, 5931 }; 5932 5933 sdata_assert_lock(sdata); 5934 5935 /* Process beacon from the current BSS */ 5936 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5937 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5938 struct ieee80211_ext *ext = (void *) mgmt; 5939 5940 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5941 variable = ext->u.s1g_short_beacon.variable; 5942 else 5943 variable = ext->u.s1g_beacon.variable; 5944 } 5945 5946 baselen = (u8 *) variable - (u8 *) mgmt; 5947 if (baselen > len) 5948 return; 5949 5950 parse_params.start = variable; 5951 parse_params.len = len - baselen; 5952 5953 rcu_read_lock(); 5954 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5955 if (!chanctx_conf) { 5956 rcu_read_unlock(); 5957 return; 5958 } 5959 5960 if (ieee80211_rx_status_to_khz(rx_status) != 5961 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5962 rcu_read_unlock(); 5963 return; 5964 } 5965 chan = chanctx_conf->def.chan; 5966 rcu_read_unlock(); 5967 5968 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5969 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 5970 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5971 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5972 elems = ieee802_11_parse_elems_full(&parse_params); 5973 if (!elems) 5974 return; 5975 5976 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5977 5978 if (elems->dtim_period) 5979 link->u.mgd.dtim_period = elems->dtim_period; 5980 link->u.mgd.have_beacon = true; 5981 ifmgd->assoc_data->need_beacon = false; 5982 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5983 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5984 link->conf->sync_tsf = 5985 le64_to_cpu(mgmt->u.beacon.timestamp); 5986 link->conf->sync_device_ts = 5987 rx_status->device_timestamp; 5988 link->conf->sync_dtim_count = elems->dtim_count; 5989 } 5990 5991 if (elems->mbssid_config_ie) 5992 bss_conf->profile_periodicity = 5993 elems->mbssid_config_ie->profile_periodicity; 5994 else 5995 bss_conf->profile_periodicity = 0; 5996 5997 if (elems->ext_capab_len >= 11 && 5998 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5999 bss_conf->ema_ap = true; 6000 else 6001 bss_conf->ema_ap = false; 6002 6003 /* continue assoc process */ 6004 ifmgd->assoc_data->timeout = jiffies; 6005 ifmgd->assoc_data->timeout_started = true; 6006 run_again(sdata, ifmgd->assoc_data->timeout); 6007 kfree(elems); 6008 return; 6009 } 6010 6011 if (!ifmgd->associated || 6012 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 6013 return; 6014 bssid = link->u.mgd.bssid; 6015 6016 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6017 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6018 local, rx_status); 6019 6020 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6021 mlme_dbg_ratelimited(sdata, 6022 "cancelling AP probe due to a received beacon\n"); 6023 ieee80211_reset_ap_probe(sdata); 6024 } 6025 6026 /* 6027 * Push the beacon loss detection into the future since 6028 * we are processing a beacon from the AP just now. 6029 */ 6030 ieee80211_sta_reset_beacon_monitor(sdata); 6031 6032 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6033 * element (which carries the beacon interval). Don't forget to add a 6034 * bit to care_about_ies[] above if mac80211 is interested in a 6035 * changing S1G element. 6036 */ 6037 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6038 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6039 parse_params.bss = link->u.mgd.bss; 6040 parse_params.filter = care_about_ies; 6041 parse_params.crc = ncrc; 6042 elems = ieee802_11_parse_elems_full(&parse_params); 6043 if (!elems) 6044 return; 6045 ncrc = elems->crc; 6046 6047 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6048 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6049 if (local->hw.conf.dynamic_ps_timeout > 0) { 6050 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6051 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6052 ieee80211_hw_config(local, 6053 IEEE80211_CONF_CHANGE_PS); 6054 } 6055 ieee80211_send_nullfunc(local, sdata, false); 6056 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6057 local->pspolling = true; 6058 6059 /* 6060 * Here is assumed that the driver will be 6061 * able to send ps-poll frame and receive a 6062 * response even though power save mode is 6063 * enabled, but some drivers might require 6064 * to disable power save here. This needs 6065 * to be investigated. 6066 */ 6067 ieee80211_send_pspoll(local, sdata); 6068 } 6069 } 6070 6071 if (sdata->vif.p2p || 6072 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6073 struct ieee80211_p2p_noa_attr noa = {}; 6074 int ret; 6075 6076 ret = cfg80211_get_p2p_attr(variable, 6077 len - baselen, 6078 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6079 (u8 *) &noa, sizeof(noa)); 6080 if (ret >= 2) { 6081 if (link->u.mgd.p2p_noa_index != noa.index) { 6082 /* valid noa_attr and index changed */ 6083 link->u.mgd.p2p_noa_index = noa.index; 6084 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6085 changed |= BSS_CHANGED_P2P_PS; 6086 /* 6087 * make sure we update all information, the CRC 6088 * mechanism doesn't look at P2P attributes. 6089 */ 6090 link->u.mgd.beacon_crc_valid = false; 6091 } 6092 } else if (link->u.mgd.p2p_noa_index != -1) { 6093 /* noa_attr not found and we had valid noa_attr before */ 6094 link->u.mgd.p2p_noa_index = -1; 6095 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6096 changed |= BSS_CHANGED_P2P_PS; 6097 link->u.mgd.beacon_crc_valid = false; 6098 } 6099 } 6100 6101 if (link->u.mgd.csa_waiting_bcn) 6102 ieee80211_chswitch_post_beacon(link); 6103 6104 /* 6105 * Update beacon timing and dtim count on every beacon appearance. This 6106 * will allow the driver to use the most updated values. Do it before 6107 * comparing this one with last received beacon. 6108 * IMPORTANT: These parameters would possibly be out of sync by the time 6109 * the driver will use them. The synchronized view is currently 6110 * guaranteed only in certain callbacks. 6111 */ 6112 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6113 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6114 link->conf->sync_tsf = 6115 le64_to_cpu(mgmt->u.beacon.timestamp); 6116 link->conf->sync_device_ts = 6117 rx_status->device_timestamp; 6118 link->conf->sync_dtim_count = elems->dtim_count; 6119 } 6120 6121 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6122 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6123 goto free; 6124 link->u.mgd.beacon_crc = ncrc; 6125 link->u.mgd.beacon_crc_valid = true; 6126 6127 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6128 6129 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6130 rx_status->device_timestamp, 6131 elems, true); 6132 6133 if (!link->u.mgd.disable_wmm_tracking && 6134 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6135 elems->wmm_param_len, 6136 elems->mu_edca_param_set)) 6137 changed |= BSS_CHANGED_QOS; 6138 6139 /* 6140 * If we haven't had a beacon before, tell the driver about the 6141 * DTIM period (and beacon timing if desired) now. 6142 */ 6143 if (!link->u.mgd.have_beacon) { 6144 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6145 bss_conf->dtim_period = elems->dtim_period ?: 1; 6146 6147 changed |= BSS_CHANGED_BEACON_INFO; 6148 link->u.mgd.have_beacon = true; 6149 6150 mutex_lock(&local->iflist_mtx); 6151 ieee80211_recalc_ps(local); 6152 mutex_unlock(&local->iflist_mtx); 6153 6154 ieee80211_recalc_ps_vif(sdata); 6155 } 6156 6157 if (elems->erp_info) { 6158 erp_valid = true; 6159 erp_value = elems->erp_info[0]; 6160 } else { 6161 erp_valid = false; 6162 } 6163 6164 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6165 changed |= ieee80211_handle_bss_capability(link, 6166 le16_to_cpu(mgmt->u.beacon.capab_info), 6167 erp_valid, erp_value); 6168 6169 mutex_lock(&local->sta_mtx); 6170 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6171 if (WARN_ON(!sta)) { 6172 mutex_unlock(&local->sta_mtx); 6173 goto free; 6174 } 6175 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6176 lockdep_is_held(&local->sta_mtx)); 6177 if (WARN_ON(!link_sta)) { 6178 mutex_unlock(&local->sta_mtx); 6179 goto free; 6180 } 6181 6182 if (WARN_ON(!link->conf->chandef.chan)) 6183 goto free; 6184 6185 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 6186 6187 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6188 6189 if (ieee80211_config_bw(link, elems->ht_cap_elem, 6190 elems->vht_cap_elem, elems->ht_operation, 6191 elems->vht_operation, elems->he_operation, 6192 elems->eht_operation, 6193 elems->s1g_oper, bssid, &changed)) { 6194 mutex_unlock(&local->sta_mtx); 6195 sdata_info(sdata, 6196 "failed to follow AP %pM bandwidth change, disconnect\n", 6197 bssid); 6198 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6199 WLAN_REASON_DEAUTH_LEAVING, 6200 true, deauth_buf); 6201 ieee80211_report_disconnect(sdata, deauth_buf, 6202 sizeof(deauth_buf), true, 6203 WLAN_REASON_DEAUTH_LEAVING, 6204 false); 6205 goto free; 6206 } 6207 6208 if (elems->opmode_notif) 6209 ieee80211_vht_handle_opmode(sdata, link_sta, 6210 *elems->opmode_notif, 6211 rx_status->band); 6212 mutex_unlock(&local->sta_mtx); 6213 6214 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6215 elems->country_elem, 6216 elems->country_elem_len, 6217 elems->pwr_constr_elem, 6218 elems->cisco_dtpc_elem); 6219 6220 if (elems->eht_operation && 6221 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 6222 if (!ieee80211_config_puncturing(link, elems->eht_operation, 6223 &changed)) { 6224 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6225 WLAN_REASON_DEAUTH_LEAVING, 6226 true, deauth_buf); 6227 ieee80211_report_disconnect(sdata, deauth_buf, 6228 sizeof(deauth_buf), true, 6229 WLAN_REASON_DEAUTH_LEAVING, 6230 false); 6231 goto free; 6232 } 6233 } 6234 6235 ieee80211_ml_reconfiguration(sdata, elems); 6236 6237 ieee80211_link_info_change_notify(sdata, link, changed); 6238 free: 6239 kfree(elems); 6240 } 6241 ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)6242 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 6243 struct sk_buff *skb) 6244 { 6245 struct ieee80211_link_data *link = &sdata->deflink; 6246 struct ieee80211_rx_status *rx_status; 6247 struct ieee80211_hdr *hdr; 6248 u16 fc; 6249 6250 rx_status = (struct ieee80211_rx_status *) skb->cb; 6251 hdr = (struct ieee80211_hdr *) skb->data; 6252 fc = le16_to_cpu(hdr->frame_control); 6253 6254 sdata_lock(sdata); 6255 switch (fc & IEEE80211_FCTL_STYPE) { 6256 case IEEE80211_STYPE_S1G_BEACON: 6257 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 6258 break; 6259 } 6260 sdata_unlock(sdata); 6261 } 6262 ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)6263 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 6264 struct sk_buff *skb) 6265 { 6266 struct ieee80211_link_data *link = &sdata->deflink; 6267 struct ieee80211_rx_status *rx_status; 6268 struct ieee80211_mgmt *mgmt; 6269 u16 fc; 6270 int ies_len; 6271 6272 rx_status = (struct ieee80211_rx_status *) skb->cb; 6273 mgmt = (struct ieee80211_mgmt *) skb->data; 6274 fc = le16_to_cpu(mgmt->frame_control); 6275 6276 sdata_lock(sdata); 6277 6278 if (rx_status->link_valid) { 6279 link = sdata_dereference(sdata->link[rx_status->link_id], 6280 sdata); 6281 if (!link) 6282 goto out; 6283 } 6284 6285 switch (fc & IEEE80211_FCTL_STYPE) { 6286 case IEEE80211_STYPE_BEACON: 6287 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 6288 skb->len, rx_status); 6289 break; 6290 case IEEE80211_STYPE_PROBE_RESP: 6291 ieee80211_rx_mgmt_probe_resp(link, skb); 6292 break; 6293 case IEEE80211_STYPE_AUTH: 6294 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 6295 break; 6296 case IEEE80211_STYPE_DEAUTH: 6297 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6298 break; 6299 case IEEE80211_STYPE_DISASSOC: 6300 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6301 break; 6302 case IEEE80211_STYPE_ASSOC_RESP: 6303 case IEEE80211_STYPE_REASSOC_RESP: 6304 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6305 break; 6306 case IEEE80211_STYPE_ACTION: 6307 if (!sdata->u.mgd.associated || 6308 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 6309 break; 6310 6311 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6312 struct ieee802_11_elems *elems; 6313 6314 ies_len = skb->len - 6315 offsetof(struct ieee80211_mgmt, 6316 u.action.u.chan_switch.variable); 6317 6318 if (ies_len < 0) 6319 break; 6320 6321 /* CSA IE cannot be overridden, no need for BSSID */ 6322 elems = ieee802_11_parse_elems( 6323 mgmt->u.action.u.chan_switch.variable, 6324 ies_len, true, NULL); 6325 6326 if (elems && !elems->parse_error) 6327 ieee80211_sta_process_chanswitch(link, 6328 rx_status->mactime, 6329 rx_status->device_timestamp, 6330 elems, false); 6331 kfree(elems); 6332 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6333 struct ieee802_11_elems *elems; 6334 6335 ies_len = skb->len - 6336 offsetof(struct ieee80211_mgmt, 6337 u.action.u.ext_chan_switch.variable); 6338 6339 if (ies_len < 0) 6340 break; 6341 6342 /* 6343 * extended CSA IE can't be overridden, no need for 6344 * BSSID 6345 */ 6346 elems = ieee802_11_parse_elems( 6347 mgmt->u.action.u.ext_chan_switch.variable, 6348 ies_len, true, NULL); 6349 6350 if (elems && !elems->parse_error) { 6351 /* for the handling code pretend it was an IE */ 6352 elems->ext_chansw_ie = 6353 &mgmt->u.action.u.ext_chan_switch.data; 6354 6355 ieee80211_sta_process_chanswitch(link, 6356 rx_status->mactime, 6357 rx_status->device_timestamp, 6358 elems, false); 6359 } 6360 6361 kfree(elems); 6362 } 6363 break; 6364 } 6365 out: 6366 sdata_unlock(sdata); 6367 } 6368 ieee80211_sta_timer(struct timer_list * t)6369 static void ieee80211_sta_timer(struct timer_list *t) 6370 { 6371 struct ieee80211_sub_if_data *sdata = 6372 from_timer(sdata, t, u.mgd.timer); 6373 6374 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 6375 } 6376 ieee80211_sta_connection_lost(struct ieee80211_sub_if_data * sdata,u8 reason,bool tx)6377 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6378 u8 reason, bool tx) 6379 { 6380 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6381 6382 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6383 tx, frame_buf); 6384 6385 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6386 reason, false); 6387 } 6388 ieee80211_auth(struct ieee80211_sub_if_data * sdata)6389 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6390 { 6391 struct ieee80211_local *local = sdata->local; 6392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6393 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6394 u32 tx_flags = 0; 6395 u16 trans = 1; 6396 u16 status = 0; 6397 struct ieee80211_prep_tx_info info = { 6398 .subtype = IEEE80211_STYPE_AUTH, 6399 }; 6400 6401 sdata_assert_lock(sdata); 6402 6403 if (WARN_ON_ONCE(!auth_data)) 6404 return -EINVAL; 6405 6406 auth_data->tries++; 6407 6408 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6409 sdata_info(sdata, "authentication with %pM timed out\n", 6410 auth_data->ap_addr); 6411 6412 /* 6413 * Most likely AP is not in the range so remove the 6414 * bss struct for that AP. 6415 */ 6416 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6417 6418 return -ETIMEDOUT; 6419 } 6420 6421 if (auth_data->algorithm == WLAN_AUTH_SAE) 6422 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6423 6424 drv_mgd_prepare_tx(local, sdata, &info); 6425 6426 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6427 auth_data->ap_addr, auth_data->tries, 6428 IEEE80211_AUTH_MAX_TRIES); 6429 6430 auth_data->expected_transaction = 2; 6431 6432 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6433 trans = auth_data->sae_trans; 6434 status = auth_data->sae_status; 6435 auth_data->expected_transaction = trans; 6436 } 6437 6438 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6439 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6440 IEEE80211_TX_INTFL_MLME_CONN_TX; 6441 6442 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6443 auth_data->data, auth_data->data_len, 6444 auth_data->ap_addr, auth_data->ap_addr, 6445 NULL, 0, 0, tx_flags); 6446 6447 if (tx_flags == 0) { 6448 if (auth_data->algorithm == WLAN_AUTH_SAE) 6449 auth_data->timeout = jiffies + 6450 IEEE80211_AUTH_TIMEOUT_SAE; 6451 else 6452 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6453 } else { 6454 auth_data->timeout = 6455 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6456 } 6457 6458 auth_data->timeout_started = true; 6459 run_again(sdata, auth_data->timeout); 6460 6461 return 0; 6462 } 6463 ieee80211_do_assoc(struct ieee80211_sub_if_data * sdata)6464 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6465 { 6466 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6467 struct ieee80211_local *local = sdata->local; 6468 int ret; 6469 6470 sdata_assert_lock(sdata); 6471 6472 assoc_data->tries++; 6473 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6474 sdata_info(sdata, "association with %pM timed out\n", 6475 assoc_data->ap_addr); 6476 6477 /* 6478 * Most likely AP is not in the range so remove the 6479 * bss struct for that AP. 6480 */ 6481 cfg80211_unlink_bss(local->hw.wiphy, 6482 assoc_data->link[assoc_data->assoc_link_id].bss); 6483 6484 return -ETIMEDOUT; 6485 } 6486 6487 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6488 assoc_data->ap_addr, assoc_data->tries, 6489 IEEE80211_ASSOC_MAX_TRIES); 6490 ret = ieee80211_send_assoc(sdata); 6491 if (ret) 6492 return ret; 6493 6494 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6495 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6496 assoc_data->timeout_started = true; 6497 run_again(sdata, assoc_data->timeout); 6498 } else { 6499 assoc_data->timeout = 6500 round_jiffies_up(jiffies + 6501 IEEE80211_ASSOC_TIMEOUT_LONG); 6502 assoc_data->timeout_started = true; 6503 run_again(sdata, assoc_data->timeout); 6504 } 6505 6506 return 0; 6507 } 6508 ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data * sdata,__le16 fc,bool acked)6509 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6510 __le16 fc, bool acked) 6511 { 6512 struct ieee80211_local *local = sdata->local; 6513 6514 sdata->u.mgd.status_fc = fc; 6515 sdata->u.mgd.status_acked = acked; 6516 sdata->u.mgd.status_received = true; 6517 6518 wiphy_work_queue(local->hw.wiphy, &sdata->work); 6519 } 6520 ieee80211_sta_work(struct ieee80211_sub_if_data * sdata)6521 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6522 { 6523 struct ieee80211_local *local = sdata->local; 6524 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6525 6526 sdata_lock(sdata); 6527 6528 if (ifmgd->status_received) { 6529 __le16 fc = ifmgd->status_fc; 6530 bool status_acked = ifmgd->status_acked; 6531 6532 ifmgd->status_received = false; 6533 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6534 if (status_acked) { 6535 if (ifmgd->auth_data->algorithm == 6536 WLAN_AUTH_SAE) 6537 ifmgd->auth_data->timeout = 6538 jiffies + 6539 IEEE80211_AUTH_TIMEOUT_SAE; 6540 else 6541 ifmgd->auth_data->timeout = 6542 jiffies + 6543 IEEE80211_AUTH_TIMEOUT_SHORT; 6544 run_again(sdata, ifmgd->auth_data->timeout); 6545 } else { 6546 ifmgd->auth_data->timeout = jiffies - 1; 6547 } 6548 ifmgd->auth_data->timeout_started = true; 6549 } else if (ifmgd->assoc_data && 6550 (ieee80211_is_assoc_req(fc) || 6551 ieee80211_is_reassoc_req(fc))) { 6552 if (status_acked) { 6553 ifmgd->assoc_data->timeout = 6554 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6555 run_again(sdata, ifmgd->assoc_data->timeout); 6556 } else { 6557 ifmgd->assoc_data->timeout = jiffies - 1; 6558 } 6559 ifmgd->assoc_data->timeout_started = true; 6560 } 6561 } 6562 6563 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6564 time_after(jiffies, ifmgd->auth_data->timeout)) { 6565 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6566 /* 6567 * ok ... we waited for assoc or continuation but 6568 * userspace didn't do it, so kill the auth data 6569 */ 6570 ieee80211_destroy_auth_data(sdata, false); 6571 } else if (ieee80211_auth(sdata)) { 6572 u8 ap_addr[ETH_ALEN]; 6573 struct ieee80211_event event = { 6574 .type = MLME_EVENT, 6575 .u.mlme.data = AUTH_EVENT, 6576 .u.mlme.status = MLME_TIMEOUT, 6577 }; 6578 6579 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6580 6581 ieee80211_destroy_auth_data(sdata, false); 6582 6583 cfg80211_auth_timeout(sdata->dev, ap_addr); 6584 drv_event_callback(sdata->local, sdata, &event); 6585 } 6586 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6587 run_again(sdata, ifmgd->auth_data->timeout); 6588 6589 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6590 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6591 if ((ifmgd->assoc_data->need_beacon && 6592 !sdata->deflink.u.mgd.have_beacon) || 6593 ieee80211_do_assoc(sdata)) { 6594 struct ieee80211_event event = { 6595 .type = MLME_EVENT, 6596 .u.mlme.data = ASSOC_EVENT, 6597 .u.mlme.status = MLME_TIMEOUT, 6598 }; 6599 6600 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6601 drv_event_callback(sdata->local, sdata, &event); 6602 } 6603 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6604 run_again(sdata, ifmgd->assoc_data->timeout); 6605 6606 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6607 ifmgd->associated) { 6608 u8 *bssid = sdata->deflink.u.mgd.bssid; 6609 int max_tries; 6610 6611 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6612 max_tries = max_nullfunc_tries; 6613 else 6614 max_tries = max_probe_tries; 6615 6616 /* ACK received for nullfunc probing frame */ 6617 if (!ifmgd->probe_send_count) 6618 ieee80211_reset_ap_probe(sdata); 6619 else if (ifmgd->nullfunc_failed) { 6620 if (ifmgd->probe_send_count < max_tries) { 6621 mlme_dbg(sdata, 6622 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6623 bssid, ifmgd->probe_send_count, 6624 max_tries); 6625 ieee80211_mgd_probe_ap_send(sdata); 6626 } else { 6627 mlme_dbg(sdata, 6628 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6629 bssid); 6630 ieee80211_sta_connection_lost(sdata, 6631 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6632 false); 6633 } 6634 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6635 run_again(sdata, ifmgd->probe_timeout); 6636 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6637 mlme_dbg(sdata, 6638 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6639 bssid, probe_wait_ms); 6640 ieee80211_sta_connection_lost(sdata, 6641 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6642 } else if (ifmgd->probe_send_count < max_tries) { 6643 mlme_dbg(sdata, 6644 "No probe response from AP %pM after %dms, try %d/%i\n", 6645 bssid, probe_wait_ms, 6646 ifmgd->probe_send_count, max_tries); 6647 ieee80211_mgd_probe_ap_send(sdata); 6648 } else { 6649 /* 6650 * We actually lost the connection ... or did we? 6651 * Let's make sure! 6652 */ 6653 mlme_dbg(sdata, 6654 "No probe response from AP %pM after %dms, disconnecting.\n", 6655 bssid, probe_wait_ms); 6656 6657 ieee80211_sta_connection_lost(sdata, 6658 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6659 } 6660 } 6661 6662 sdata_unlock(sdata); 6663 } 6664 ieee80211_sta_bcn_mon_timer(struct timer_list * t)6665 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6666 { 6667 struct ieee80211_sub_if_data *sdata = 6668 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6669 6670 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 6671 return; 6672 6673 if (sdata->vif.bss_conf.csa_active && 6674 !sdata->deflink.u.mgd.csa_waiting_bcn) 6675 return; 6676 6677 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6678 return; 6679 6680 sdata->u.mgd.connection_loss = false; 6681 wiphy_work_queue(sdata->local->hw.wiphy, 6682 &sdata->u.mgd.beacon_connection_loss_work); 6683 } 6684 ieee80211_sta_conn_mon_timer(struct timer_list * t)6685 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6686 { 6687 struct ieee80211_sub_if_data *sdata = 6688 from_timer(sdata, t, u.mgd.conn_mon_timer); 6689 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6690 struct ieee80211_local *local = sdata->local; 6691 struct sta_info *sta; 6692 unsigned long timeout; 6693 6694 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 6695 return; 6696 6697 if (sdata->vif.bss_conf.csa_active && 6698 !sdata->deflink.u.mgd.csa_waiting_bcn) 6699 return; 6700 6701 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6702 if (!sta) 6703 return; 6704 6705 timeout = sta->deflink.status_stats.last_ack; 6706 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6707 timeout = sta->deflink.rx_stats.last_rx; 6708 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6709 6710 /* If timeout is after now, then update timer to fire at 6711 * the later date, but do not actually probe at this time. 6712 */ 6713 if (time_is_after_jiffies(timeout)) { 6714 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6715 return; 6716 } 6717 6718 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6719 } 6720 ieee80211_sta_monitor_work(struct work_struct * work)6721 static void ieee80211_sta_monitor_work(struct work_struct *work) 6722 { 6723 struct ieee80211_sub_if_data *sdata = 6724 container_of(work, struct ieee80211_sub_if_data, 6725 u.mgd.monitor_work); 6726 6727 ieee80211_mgd_probe_ap(sdata, false); 6728 } 6729 ieee80211_restart_sta_timer(struct ieee80211_sub_if_data * sdata)6730 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6731 { 6732 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6733 __ieee80211_stop_poll(sdata); 6734 6735 /* let's probe the connection once */ 6736 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6737 ieee80211_queue_work(&sdata->local->hw, 6738 &sdata->u.mgd.monitor_work); 6739 } 6740 } 6741 6742 #ifdef CONFIG_PM ieee80211_mgd_quiesce(struct ieee80211_sub_if_data * sdata)6743 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6744 { 6745 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6746 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6747 6748 sdata_lock(sdata); 6749 6750 if (ifmgd->auth_data || ifmgd->assoc_data) { 6751 const u8 *ap_addr = ifmgd->auth_data ? 6752 ifmgd->auth_data->ap_addr : 6753 ifmgd->assoc_data->ap_addr; 6754 6755 /* 6756 * If we are trying to authenticate / associate while suspending, 6757 * cfg80211 won't know and won't actually abort those attempts, 6758 * thus we need to do that ourselves. 6759 */ 6760 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6761 IEEE80211_STYPE_DEAUTH, 6762 WLAN_REASON_DEAUTH_LEAVING, 6763 false, frame_buf); 6764 if (ifmgd->assoc_data) 6765 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6766 if (ifmgd->auth_data) 6767 ieee80211_destroy_auth_data(sdata, false); 6768 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6769 IEEE80211_DEAUTH_FRAME_LEN, 6770 false); 6771 } 6772 6773 /* This is a bit of a hack - we should find a better and more generic 6774 * solution to this. Normally when suspending, cfg80211 will in fact 6775 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6776 * auth (not so important) or assoc (this is the problem) process. 6777 * 6778 * As a consequence, it can happen that we are in the process of both 6779 * associating and suspending, and receive an association response 6780 * after cfg80211 has checked if it needs to disconnect, but before 6781 * we actually set the flag to drop incoming frames. This will then 6782 * cause the workqueue flush to process the association response in 6783 * the suspend, resulting in a successful association just before it 6784 * tries to remove the interface from the driver, which now though 6785 * has a channel context assigned ... this results in issues. 6786 * 6787 * To work around this (for now) simply deauth here again if we're 6788 * now connected. 6789 */ 6790 if (ifmgd->associated && !sdata->local->wowlan) { 6791 u8 bssid[ETH_ALEN]; 6792 struct cfg80211_deauth_request req = { 6793 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6794 .bssid = bssid, 6795 }; 6796 6797 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6798 ieee80211_mgd_deauth(sdata, &req); 6799 } 6800 6801 sdata_unlock(sdata); 6802 } 6803 #endif 6804 ieee80211_sta_restart(struct ieee80211_sub_if_data * sdata)6805 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6806 { 6807 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6808 6809 sdata_lock(sdata); 6810 if (!ifmgd->associated) { 6811 sdata_unlock(sdata); 6812 return; 6813 } 6814 6815 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6816 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6817 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6818 ieee80211_sta_connection_lost(sdata, 6819 WLAN_REASON_UNSPECIFIED, 6820 true); 6821 sdata_unlock(sdata); 6822 return; 6823 } 6824 6825 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6826 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6827 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6828 ieee80211_sta_connection_lost(sdata, 6829 WLAN_REASON_UNSPECIFIED, 6830 true); 6831 sdata_unlock(sdata); 6832 return; 6833 } 6834 6835 sdata_unlock(sdata); 6836 } 6837 ieee80211_request_smps_mgd_work(struct wiphy * wiphy,struct wiphy_work * work)6838 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 6839 struct wiphy_work *work) 6840 { 6841 struct ieee80211_link_data *link = 6842 container_of(work, struct ieee80211_link_data, 6843 u.mgd.request_smps_work); 6844 6845 sdata_lock(link->sdata); 6846 __ieee80211_request_smps_mgd(link->sdata, link, 6847 link->u.mgd.driver_smps_mode); 6848 sdata_unlock(link->sdata); 6849 } 6850 6851 /* interface setup */ ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data * sdata)6852 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6853 { 6854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6855 6856 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6857 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 6858 ieee80211_beacon_connection_loss_work); 6859 wiphy_work_init(&ifmgd->csa_connection_drop_work, 6860 ieee80211_csa_connection_drop_work); 6861 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6862 ieee80211_tdls_peer_del_work); 6863 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 6864 ieee80211_ml_reconf_work); 6865 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6866 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6867 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6868 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6869 ieee80211_sta_handle_tspec_ac_params_wk); 6870 6871 ifmgd->flags = 0; 6872 ifmgd->powersave = sdata->wdev.ps; 6873 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6874 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6875 /* Setup TDLS data */ 6876 spin_lock_init(&ifmgd->teardown_lock); 6877 ifmgd->teardown_skb = NULL; 6878 ifmgd->orig_teardown_skb = NULL; 6879 } 6880 ieee80211_mgd_setup_link(struct ieee80211_link_data * link)6881 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6882 { 6883 struct ieee80211_sub_if_data *sdata = link->sdata; 6884 struct ieee80211_local *local = sdata->local; 6885 unsigned int link_id = link->link_id; 6886 6887 link->u.mgd.p2p_noa_index = -1; 6888 link->u.mgd.conn_flags = 0; 6889 link->conf->bssid = link->u.mgd.bssid; 6890 6891 wiphy_work_init(&link->u.mgd.request_smps_work, 6892 ieee80211_request_smps_mgd_work); 6893 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6894 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6895 else 6896 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6897 6898 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 6899 ieee80211_chswitch_work); 6900 6901 if (sdata->u.mgd.assoc_data) 6902 ether_addr_copy(link->conf->addr, 6903 sdata->u.mgd.assoc_data->link[link_id].addr); 6904 else if (!is_valid_ether_addr(link->conf->addr)) 6905 eth_random_addr(link->conf->addr); 6906 } 6907 6908 /* scan finished notification */ ieee80211_mlme_notify_scan_completed(struct ieee80211_local * local)6909 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6910 { 6911 struct ieee80211_sub_if_data *sdata; 6912 6913 /* Restart STA timers */ 6914 rcu_read_lock(); 6915 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6916 if (ieee80211_sdata_running(sdata)) 6917 ieee80211_restart_sta_timer(sdata); 6918 } 6919 rcu_read_unlock(); 6920 } 6921 ieee80211_prep_connection(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * cbss,s8 link_id,const u8 * ap_mld_addr,bool assoc,bool override)6922 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6923 struct cfg80211_bss *cbss, s8 link_id, 6924 const u8 *ap_mld_addr, bool assoc, 6925 bool override) 6926 { 6927 struct ieee80211_local *local = sdata->local; 6928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6929 struct ieee80211_bss *bss = (void *)cbss->priv; 6930 struct sta_info *new_sta = NULL; 6931 struct ieee80211_link_data *link; 6932 bool have_sta = false; 6933 bool mlo; 6934 int err; 6935 6936 if (link_id >= 0) { 6937 mlo = true; 6938 if (WARN_ON(!ap_mld_addr)) 6939 return -EINVAL; 6940 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 6941 } else { 6942 if (WARN_ON(ap_mld_addr)) 6943 return -EINVAL; 6944 ap_mld_addr = cbss->bssid; 6945 err = ieee80211_vif_set_links(sdata, 0, 0); 6946 link_id = 0; 6947 mlo = false; 6948 } 6949 6950 if (err) 6951 return err; 6952 6953 link = sdata_dereference(sdata->link[link_id], sdata); 6954 if (WARN_ON(!link)) { 6955 err = -ENOLINK; 6956 goto out_err; 6957 } 6958 6959 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6960 err = -EINVAL; 6961 goto out_err; 6962 } 6963 6964 /* If a reconfig is happening, bail out */ 6965 if (local->in_reconfig) { 6966 err = -EBUSY; 6967 goto out_err; 6968 } 6969 6970 if (assoc) { 6971 rcu_read_lock(); 6972 have_sta = sta_info_get(sdata, ap_mld_addr); 6973 rcu_read_unlock(); 6974 } 6975 6976 if (!have_sta) { 6977 if (mlo) 6978 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6979 link_id, cbss->bssid, 6980 GFP_KERNEL); 6981 else 6982 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6983 6984 if (!new_sta) { 6985 err = -ENOMEM; 6986 goto out_err; 6987 } 6988 6989 new_sta->sta.mlo = mlo; 6990 } 6991 6992 /* 6993 * Set up the information for the new channel before setting the 6994 * new channel. We can't - completely race-free - change the basic 6995 * rates bitmap and the channel (sband) that it refers to, but if 6996 * we set it up before we at least avoid calling into the driver's 6997 * bss_info_changed() method with invalid information (since we do 6998 * call that from changing the channel - only for IDLE and perhaps 6999 * some others, but ...). 7000 * 7001 * So to avoid that, just set up all the new information before the 7002 * channel, but tell the driver to apply it only afterwards, since 7003 * it might need the new channel for that. 7004 */ 7005 if (new_sta) { 7006 const struct cfg80211_bss_ies *ies; 7007 struct link_sta_info *link_sta; 7008 7009 rcu_read_lock(); 7010 link_sta = rcu_dereference(new_sta->link[link_id]); 7011 if (WARN_ON(!link_sta)) { 7012 rcu_read_unlock(); 7013 sta_info_free(local, new_sta); 7014 err = -EINVAL; 7015 goto out_err; 7016 } 7017 7018 err = ieee80211_mgd_setup_link_sta(link, new_sta, 7019 link_sta, cbss); 7020 if (err) { 7021 rcu_read_unlock(); 7022 sta_info_free(local, new_sta); 7023 goto out_err; 7024 } 7025 7026 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 7027 7028 /* set timing information */ 7029 link->conf->beacon_int = cbss->beacon_interval; 7030 ies = rcu_dereference(cbss->beacon_ies); 7031 if (ies) { 7032 link->conf->sync_tsf = ies->tsf; 7033 link->conf->sync_device_ts = 7034 bss->device_ts_beacon; 7035 7036 ieee80211_get_dtim(ies, 7037 &link->conf->sync_dtim_count, 7038 NULL); 7039 } else if (!ieee80211_hw_check(&sdata->local->hw, 7040 TIMING_BEACON_ONLY)) { 7041 ies = rcu_dereference(cbss->proberesp_ies); 7042 /* must be non-NULL since beacon IEs were NULL */ 7043 link->conf->sync_tsf = ies->tsf; 7044 link->conf->sync_device_ts = 7045 bss->device_ts_presp; 7046 link->conf->sync_dtim_count = 0; 7047 } else { 7048 link->conf->sync_tsf = 0; 7049 link->conf->sync_device_ts = 0; 7050 link->conf->sync_dtim_count = 0; 7051 } 7052 rcu_read_unlock(); 7053 } 7054 7055 if (new_sta || override) { 7056 err = ieee80211_prep_channel(sdata, link, cbss, 7057 &link->u.mgd.conn_flags); 7058 if (err) { 7059 if (new_sta) 7060 sta_info_free(local, new_sta); 7061 goto out_err; 7062 } 7063 } 7064 7065 if (new_sta) { 7066 /* 7067 * tell driver about BSSID, basic rates and timing 7068 * this was set up above, before setting the channel 7069 */ 7070 ieee80211_link_info_change_notify(sdata, link, 7071 BSS_CHANGED_BSSID | 7072 BSS_CHANGED_BASIC_RATES | 7073 BSS_CHANGED_BEACON_INT); 7074 7075 if (assoc) 7076 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 7077 7078 err = sta_info_insert(new_sta); 7079 new_sta = NULL; 7080 if (err) { 7081 sdata_info(sdata, 7082 "failed to insert STA entry for the AP (error %d)\n", 7083 err); 7084 goto out_release_chan; 7085 } 7086 } else 7087 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 7088 7089 /* Cancel scan to ensure that nothing interferes with connection */ 7090 if (local->scanning) 7091 ieee80211_scan_cancel(local); 7092 7093 return 0; 7094 7095 out_release_chan: 7096 ieee80211_link_release_channel(link); 7097 out_err: 7098 ieee80211_vif_set_links(sdata, 0, 0); 7099 return err; 7100 } 7101 7102 /* config hooks */ ieee80211_mgd_auth(struct ieee80211_sub_if_data * sdata,struct cfg80211_auth_request * req)7103 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 7104 struct cfg80211_auth_request *req) 7105 { 7106 struct ieee80211_local *local = sdata->local; 7107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7108 struct ieee80211_mgd_auth_data *auth_data; 7109 u16 auth_alg; 7110 int err; 7111 bool cont_auth; 7112 7113 /* prepare auth data structure */ 7114 7115 switch (req->auth_type) { 7116 case NL80211_AUTHTYPE_OPEN_SYSTEM: 7117 auth_alg = WLAN_AUTH_OPEN; 7118 break; 7119 case NL80211_AUTHTYPE_SHARED_KEY: 7120 if (fips_enabled) 7121 return -EOPNOTSUPP; 7122 auth_alg = WLAN_AUTH_SHARED_KEY; 7123 break; 7124 case NL80211_AUTHTYPE_FT: 7125 auth_alg = WLAN_AUTH_FT; 7126 break; 7127 case NL80211_AUTHTYPE_NETWORK_EAP: 7128 auth_alg = WLAN_AUTH_LEAP; 7129 break; 7130 case NL80211_AUTHTYPE_SAE: 7131 auth_alg = WLAN_AUTH_SAE; 7132 break; 7133 case NL80211_AUTHTYPE_FILS_SK: 7134 auth_alg = WLAN_AUTH_FILS_SK; 7135 break; 7136 case NL80211_AUTHTYPE_FILS_SK_PFS: 7137 auth_alg = WLAN_AUTH_FILS_SK_PFS; 7138 break; 7139 case NL80211_AUTHTYPE_FILS_PK: 7140 auth_alg = WLAN_AUTH_FILS_PK; 7141 break; 7142 default: 7143 return -EOPNOTSUPP; 7144 } 7145 7146 if (ifmgd->assoc_data) 7147 return -EBUSY; 7148 7149 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 7150 req->ie_len, GFP_KERNEL); 7151 if (!auth_data) 7152 return -ENOMEM; 7153 7154 memcpy(auth_data->ap_addr, 7155 req->ap_mld_addr ?: req->bss->bssid, 7156 ETH_ALEN); 7157 auth_data->bss = req->bss; 7158 auth_data->link_id = req->link_id; 7159 7160 if (req->auth_data_len >= 4) { 7161 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 7162 __le16 *pos = (__le16 *) req->auth_data; 7163 7164 auth_data->sae_trans = le16_to_cpu(pos[0]); 7165 auth_data->sae_status = le16_to_cpu(pos[1]); 7166 } 7167 memcpy(auth_data->data, req->auth_data + 4, 7168 req->auth_data_len - 4); 7169 auth_data->data_len += req->auth_data_len - 4; 7170 } 7171 7172 /* Check if continuing authentication or trying to authenticate with the 7173 * same BSS that we were in the process of authenticating with and avoid 7174 * removal and re-addition of the STA entry in 7175 * ieee80211_prep_connection(). 7176 */ 7177 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 7178 ifmgd->auth_data->link_id == req->link_id; 7179 7180 if (req->ie && req->ie_len) { 7181 memcpy(&auth_data->data[auth_data->data_len], 7182 req->ie, req->ie_len); 7183 auth_data->data_len += req->ie_len; 7184 } 7185 7186 if (req->key && req->key_len) { 7187 auth_data->key_len = req->key_len; 7188 auth_data->key_idx = req->key_idx; 7189 memcpy(auth_data->key, req->key, req->key_len); 7190 } 7191 7192 auth_data->algorithm = auth_alg; 7193 7194 /* try to authenticate/probe */ 7195 7196 if (ifmgd->auth_data) { 7197 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 7198 auth_data->peer_confirmed = 7199 ifmgd->auth_data->peer_confirmed; 7200 } 7201 ieee80211_destroy_auth_data(sdata, cont_auth); 7202 } 7203 7204 /* prep auth_data so we don't go into idle on disassoc */ 7205 ifmgd->auth_data = auth_data; 7206 7207 /* If this is continuation of an ongoing SAE authentication exchange 7208 * (i.e., request to send SAE Confirm) and the peer has already 7209 * confirmed, mark authentication completed since we are about to send 7210 * out SAE Confirm. 7211 */ 7212 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 7213 auth_data->peer_confirmed && auth_data->sae_trans == 2) 7214 ieee80211_mark_sta_auth(sdata); 7215 7216 if (ifmgd->associated) { 7217 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7218 7219 sdata_info(sdata, 7220 "disconnect from AP %pM for new auth to %pM\n", 7221 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 7222 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7223 WLAN_REASON_UNSPECIFIED, 7224 false, frame_buf); 7225 7226 ieee80211_report_disconnect(sdata, frame_buf, 7227 sizeof(frame_buf), true, 7228 WLAN_REASON_UNSPECIFIED, 7229 false); 7230 } 7231 7232 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 7233 7234 /* needed for transmitting the auth frame(s) properly */ 7235 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 7236 7237 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 7238 req->ap_mld_addr, cont_auth, false); 7239 if (err) 7240 goto err_clear; 7241 7242 err = ieee80211_auth(sdata); 7243 if (err) { 7244 sta_info_destroy_addr(sdata, auth_data->ap_addr); 7245 goto err_clear; 7246 } 7247 7248 /* hold our own reference */ 7249 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 7250 return 0; 7251 7252 err_clear: 7253 if (!ieee80211_vif_is_mld(&sdata->vif)) { 7254 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7255 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7256 BSS_CHANGED_BSSID); 7257 mutex_lock(&sdata->local->mtx); 7258 ieee80211_link_release_channel(&sdata->deflink); 7259 mutex_unlock(&sdata->local->mtx); 7260 } 7261 ifmgd->auth_data = NULL; 7262 kfree(auth_data); 7263 return err; 7264 } 7265 7266 static ieee80211_conn_flags_t ieee80211_setup_assoc_link(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgd_assoc_data * assoc_data,struct cfg80211_assoc_request * req,ieee80211_conn_flags_t conn_flags,unsigned int link_id)7267 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 7268 struct ieee80211_mgd_assoc_data *assoc_data, 7269 struct cfg80211_assoc_request *req, 7270 ieee80211_conn_flags_t conn_flags, 7271 unsigned int link_id) 7272 { 7273 struct ieee80211_local *local = sdata->local; 7274 const struct cfg80211_bss_ies *beacon_ies; 7275 struct ieee80211_supported_band *sband; 7276 const struct element *ht_elem, *vht_elem; 7277 struct ieee80211_link_data *link; 7278 struct cfg80211_bss *cbss; 7279 struct ieee80211_bss *bss; 7280 bool is_5ghz, is_6ghz; 7281 7282 cbss = assoc_data->link[link_id].bss; 7283 if (WARN_ON(!cbss)) 7284 return 0; 7285 7286 bss = (void *)cbss->priv; 7287 7288 sband = local->hw.wiphy->bands[cbss->channel->band]; 7289 if (WARN_ON(!sband)) 7290 return 0; 7291 7292 link = sdata_dereference(sdata->link[link_id], sdata); 7293 if (WARN_ON(!link)) 7294 return 0; 7295 7296 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 7297 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 7298 7299 /* for MLO connections assume advertising all rates is OK */ 7300 if (!req->ap_mld_addr) { 7301 assoc_data->supp_rates = bss->supp_rates; 7302 assoc_data->supp_rates_len = bss->supp_rates_len; 7303 } 7304 7305 /* copy and link elems for the STA profile */ 7306 if (req->links[link_id].elems_len) { 7307 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 7308 req->links[link_id].elems_len); 7309 assoc_data->link[link_id].elems = assoc_data->ie_pos; 7310 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 7311 assoc_data->ie_pos += req->links[link_id].elems_len; 7312 } 7313 7314 rcu_read_lock(); 7315 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7316 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7317 assoc_data->link[link_id].ap_ht_param = 7318 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7319 else if (!is_6ghz) 7320 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7321 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7322 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7323 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7324 sizeof(struct ieee80211_vht_cap)); 7325 } else if (is_5ghz) { 7326 link_info(link, 7327 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7328 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7329 IEEE80211_CONN_DISABLE_HE | 7330 IEEE80211_CONN_DISABLE_EHT; 7331 } 7332 rcu_read_unlock(); 7333 7334 link->u.mgd.beacon_crc_valid = false; 7335 link->u.mgd.dtim_period = 0; 7336 link->u.mgd.have_beacon = false; 7337 7338 /* override HT/VHT configuration only if the AP and we support it */ 7339 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7340 struct ieee80211_sta_ht_cap sta_ht_cap; 7341 7342 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7343 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7344 } 7345 7346 link->conf->eht_puncturing = 0; 7347 7348 rcu_read_lock(); 7349 beacon_ies = rcu_dereference(cbss->beacon_ies); 7350 if (beacon_ies) { 7351 const struct ieee80211_eht_operation *eht_oper; 7352 const struct element *elem; 7353 u8 dtim_count = 0; 7354 7355 ieee80211_get_dtim(beacon_ies, &dtim_count, 7356 &link->u.mgd.dtim_period); 7357 7358 sdata->deflink.u.mgd.have_beacon = true; 7359 7360 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7361 link->conf->sync_tsf = beacon_ies->tsf; 7362 link->conf->sync_device_ts = bss->device_ts_beacon; 7363 link->conf->sync_dtim_count = dtim_count; 7364 } 7365 7366 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7367 beacon_ies->data, beacon_ies->len); 7368 if (elem && elem->datalen >= 3) 7369 link->conf->profile_periodicity = elem->data[2]; 7370 else 7371 link->conf->profile_periodicity = 0; 7372 7373 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7374 beacon_ies->data, beacon_ies->len); 7375 if (elem && elem->datalen >= 11 && 7376 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7377 link->conf->ema_ap = true; 7378 else 7379 link->conf->ema_ap = false; 7380 7381 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7382 beacon_ies->data, beacon_ies->len); 7383 eht_oper = (const void *)(elem->data + 1); 7384 7385 if (elem && 7386 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7387 elem->datalen - 1) && 7388 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7389 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7390 const struct ieee80211_eht_operation_info *info = 7391 (void *)eht_oper->optional; 7392 const u8 *disable_subchannel_bitmap = info->optional; 7393 u16 bitmap; 7394 7395 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7396 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7397 &link->conf->chandef)) 7398 ieee80211_handle_puncturing_bitmap(link, 7399 eht_oper, 7400 bitmap, 7401 NULL); 7402 else 7403 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7404 } 7405 } 7406 rcu_read_unlock(); 7407 7408 if (bss->corrupt_data) { 7409 char *corrupt_type = "data"; 7410 7411 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7412 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7413 corrupt_type = "beacon and probe response"; 7414 else 7415 corrupt_type = "beacon"; 7416 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7417 corrupt_type = "probe response"; 7418 } 7419 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7420 cbss->bssid, corrupt_type); 7421 } 7422 7423 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7424 if (sdata->u.mgd.powersave) 7425 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7426 else 7427 link->smps_mode = IEEE80211_SMPS_OFF; 7428 } else { 7429 link->smps_mode = link->u.mgd.req_smps; 7430 } 7431 7432 return conn_flags; 7433 } 7434 ieee80211_mgd_assoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_assoc_request * req)7435 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7436 struct cfg80211_assoc_request *req) 7437 { 7438 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7439 struct ieee80211_local *local = sdata->local; 7440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7441 struct ieee80211_mgd_assoc_data *assoc_data; 7442 const struct element *ssid_elem; 7443 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7444 ieee80211_conn_flags_t conn_flags = 0; 7445 struct ieee80211_link_data *link; 7446 struct cfg80211_bss *cbss; 7447 struct ieee80211_bss *bss; 7448 bool override; 7449 int i, err; 7450 size_t size = sizeof(*assoc_data) + req->ie_len; 7451 7452 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7453 size += req->links[i].elems_len; 7454 7455 /* FIXME: no support for 4-addr MLO yet */ 7456 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7457 return -EOPNOTSUPP; 7458 7459 assoc_data = kzalloc(size, GFP_KERNEL); 7460 if (!assoc_data) 7461 return -ENOMEM; 7462 7463 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7464 7465 rcu_read_lock(); 7466 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7467 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7468 rcu_read_unlock(); 7469 kfree(assoc_data); 7470 return -EINVAL; 7471 } 7472 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7473 assoc_data->ssid_len = ssid_elem->datalen; 7474 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7475 vif_cfg->ssid_len = assoc_data->ssid_len; 7476 rcu_read_unlock(); 7477 7478 if (req->ap_mld_addr) { 7479 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7480 if (!req->links[i].bss) 7481 continue; 7482 link = sdata_dereference(sdata->link[i], sdata); 7483 if (link) 7484 ether_addr_copy(assoc_data->link[i].addr, 7485 link->conf->addr); 7486 else 7487 eth_random_addr(assoc_data->link[i].addr); 7488 } 7489 } else { 7490 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7491 } 7492 7493 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7494 7495 memcpy(assoc_data->ap_addr, 7496 req->ap_mld_addr ?: req->bss->bssid, 7497 ETH_ALEN); 7498 7499 if (ifmgd->associated) { 7500 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7501 7502 sdata_info(sdata, 7503 "disconnect from AP %pM for new assoc to %pM\n", 7504 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7505 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7506 WLAN_REASON_UNSPECIFIED, 7507 false, frame_buf); 7508 7509 ieee80211_report_disconnect(sdata, frame_buf, 7510 sizeof(frame_buf), true, 7511 WLAN_REASON_UNSPECIFIED, 7512 false); 7513 } 7514 7515 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7516 err = -EBUSY; 7517 goto err_free; 7518 } 7519 7520 if (ifmgd->assoc_data) { 7521 err = -EBUSY; 7522 goto err_free; 7523 } 7524 7525 if (ifmgd->auth_data) { 7526 bool match; 7527 7528 /* keep sta info, bssid if matching */ 7529 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7530 assoc_data->ap_addr) && 7531 ifmgd->auth_data->link_id == req->link_id; 7532 ieee80211_destroy_auth_data(sdata, match); 7533 } 7534 7535 /* prepare assoc data */ 7536 7537 bss = (void *)cbss->priv; 7538 assoc_data->wmm = bss->wmm_used && 7539 (local->hw.queues >= IEEE80211_NUM_ACS); 7540 7541 /* 7542 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7543 * We still associate in non-HT mode (11a/b/g) if any one of these 7544 * ciphers is configured as pairwise. 7545 * We can set this to true for non-11n hardware, that'll be checked 7546 * separately along with the peer capabilities. 7547 */ 7548 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7549 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7550 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7551 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7552 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7553 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7554 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7555 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7556 netdev_info(sdata->dev, 7557 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7558 } 7559 } 7560 7561 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7562 if (!bss->wmm_used) { 7563 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7564 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7565 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7566 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7567 netdev_info(sdata->dev, 7568 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7569 } 7570 7571 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7572 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7573 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7574 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7575 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7576 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7577 } 7578 7579 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7580 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7581 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7582 } 7583 7584 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7585 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7586 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7587 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7588 } 7589 7590 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7591 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7592 7593 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7594 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7595 sizeof(ifmgd->ht_capa_mask)); 7596 7597 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7598 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7599 sizeof(ifmgd->vht_capa_mask)); 7600 7601 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7602 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7603 sizeof(ifmgd->s1g_capa_mask)); 7604 7605 if (req->ie && req->ie_len) { 7606 memcpy(assoc_data->ie, req->ie, req->ie_len); 7607 assoc_data->ie_len = req->ie_len; 7608 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7609 } else { 7610 assoc_data->ie_pos = assoc_data->ie; 7611 } 7612 7613 if (req->fils_kek) { 7614 /* should already be checked in cfg80211 - so warn */ 7615 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7616 err = -EINVAL; 7617 goto err_free; 7618 } 7619 memcpy(assoc_data->fils_kek, req->fils_kek, 7620 req->fils_kek_len); 7621 assoc_data->fils_kek_len = req->fils_kek_len; 7622 } 7623 7624 if (req->fils_nonces) 7625 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7626 2 * FILS_NONCE_LEN); 7627 7628 /* default timeout */ 7629 assoc_data->timeout = jiffies; 7630 assoc_data->timeout_started = true; 7631 7632 assoc_data->assoc_link_id = assoc_link_id; 7633 7634 if (req->ap_mld_addr) { 7635 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7636 assoc_data->link[i].conn_flags = conn_flags; 7637 assoc_data->link[i].bss = req->links[i].bss; 7638 assoc_data->link[i].disabled = req->links[i].disabled; 7639 } 7640 7641 /* if there was no authentication, set up the link */ 7642 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 7643 if (err) 7644 goto err_clear; 7645 } else { 7646 assoc_data->link[0].conn_flags = conn_flags; 7647 assoc_data->link[0].bss = cbss; 7648 } 7649 7650 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7651 if (WARN_ON(!link)) { 7652 err = -EINVAL; 7653 goto err_clear; 7654 } 7655 7656 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7657 conn_flags |= link->u.mgd.conn_flags; 7658 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7659 conn_flags, assoc_link_id); 7660 override = link->u.mgd.conn_flags != conn_flags; 7661 link->u.mgd.conn_flags |= conn_flags; 7662 7663 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7664 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7665 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7666 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7667 7668 if (bss->wmm_used && bss->uapsd_supported && 7669 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7670 assoc_data->uapsd = true; 7671 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7672 } else { 7673 assoc_data->uapsd = false; 7674 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7675 } 7676 7677 if (req->prev_bssid) 7678 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7679 7680 if (req->use_mfp) { 7681 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7682 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7683 } else { 7684 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7685 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7686 } 7687 7688 if (req->flags & ASSOC_REQ_USE_RRM) 7689 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7690 else 7691 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7692 7693 if (req->crypto.control_port) 7694 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7695 else 7696 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7697 7698 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7699 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7700 sdata->control_port_over_nl80211 = 7701 req->crypto.control_port_over_nl80211; 7702 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7703 7704 /* kick off associate process */ 7705 ifmgd->assoc_data = assoc_data; 7706 7707 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7708 if (!assoc_data->link[i].bss) 7709 continue; 7710 if (i == assoc_data->assoc_link_id) 7711 continue; 7712 /* only calculate the flags, hence link == NULL */ 7713 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7714 &assoc_data->link[i].conn_flags); 7715 if (err) 7716 goto err_clear; 7717 } 7718 7719 /* needed for transmitting the assoc frames properly */ 7720 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7721 7722 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7723 req->ap_mld_addr, true, override); 7724 if (err) 7725 goto err_clear; 7726 7727 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7728 link->u.mgd.conn_flags; 7729 7730 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7731 const struct cfg80211_bss_ies *beacon_ies; 7732 7733 rcu_read_lock(); 7734 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7735 if (!beacon_ies) { 7736 /* 7737 * Wait up to one beacon interval ... 7738 * should this be more if we miss one? 7739 */ 7740 sdata_info(sdata, "waiting for beacon from %pM\n", 7741 link->u.mgd.bssid); 7742 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7743 assoc_data->timeout_started = true; 7744 assoc_data->need_beacon = true; 7745 } 7746 rcu_read_unlock(); 7747 } 7748 7749 run_again(sdata, assoc_data->timeout); 7750 7751 return 0; 7752 err_clear: 7753 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7754 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7755 BSS_CHANGED_BSSID); 7756 ifmgd->assoc_data = NULL; 7757 err_free: 7758 kfree(assoc_data); 7759 return err; 7760 } 7761 ieee80211_mgd_deauth(struct ieee80211_sub_if_data * sdata,struct cfg80211_deauth_request * req)7762 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7763 struct cfg80211_deauth_request *req) 7764 { 7765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7766 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7767 bool tx = !req->local_state_change; 7768 struct ieee80211_prep_tx_info info = { 7769 .subtype = IEEE80211_STYPE_DEAUTH, 7770 }; 7771 7772 if (ifmgd->auth_data && 7773 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7774 sdata_info(sdata, 7775 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7776 req->bssid, req->reason_code, 7777 ieee80211_get_reason_code_string(req->reason_code)); 7778 7779 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7780 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7781 IEEE80211_STYPE_DEAUTH, 7782 req->reason_code, tx, 7783 frame_buf); 7784 ieee80211_destroy_auth_data(sdata, false); 7785 ieee80211_report_disconnect(sdata, frame_buf, 7786 sizeof(frame_buf), true, 7787 req->reason_code, false); 7788 drv_mgd_complete_tx(sdata->local, sdata, &info); 7789 return 0; 7790 } 7791 7792 if (ifmgd->assoc_data && 7793 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7794 sdata_info(sdata, 7795 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7796 req->bssid, req->reason_code, 7797 ieee80211_get_reason_code_string(req->reason_code)); 7798 7799 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7800 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7801 IEEE80211_STYPE_DEAUTH, 7802 req->reason_code, tx, 7803 frame_buf); 7804 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7805 ieee80211_report_disconnect(sdata, frame_buf, 7806 sizeof(frame_buf), true, 7807 req->reason_code, false); 7808 drv_mgd_complete_tx(sdata->local, sdata, &info); 7809 return 0; 7810 } 7811 7812 if (ifmgd->associated && 7813 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7814 sdata_info(sdata, 7815 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7816 req->bssid, req->reason_code, 7817 ieee80211_get_reason_code_string(req->reason_code)); 7818 7819 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7820 req->reason_code, tx, frame_buf); 7821 ieee80211_report_disconnect(sdata, frame_buf, 7822 sizeof(frame_buf), true, 7823 req->reason_code, false); 7824 drv_mgd_complete_tx(sdata->local, sdata, &info); 7825 return 0; 7826 } 7827 7828 return -ENOTCONN; 7829 } 7830 ieee80211_mgd_disassoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_disassoc_request * req)7831 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7832 struct cfg80211_disassoc_request *req) 7833 { 7834 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7835 7836 if (!sdata->u.mgd.associated || 7837 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7838 return -ENOTCONN; 7839 7840 sdata_info(sdata, 7841 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7842 req->ap_addr, req->reason_code, 7843 ieee80211_get_reason_code_string(req->reason_code)); 7844 7845 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7846 req->reason_code, !req->local_state_change, 7847 frame_buf); 7848 7849 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7850 req->reason_code, false); 7851 7852 return 0; 7853 } 7854 ieee80211_mgd_stop_link(struct ieee80211_link_data * link)7855 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7856 { 7857 wiphy_work_cancel(link->sdata->local->hw.wiphy, 7858 &link->u.mgd.request_smps_work); 7859 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 7860 &link->u.mgd.chswitch_work); 7861 } 7862 ieee80211_mgd_stop(struct ieee80211_sub_if_data * sdata)7863 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7864 { 7865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7866 7867 /* 7868 * Make sure some work items will not run after this, 7869 * they will not do anything but might not have been 7870 * cancelled when disconnecting. 7871 */ 7872 cancel_work_sync(&ifmgd->monitor_work); 7873 wiphy_work_cancel(sdata->local->hw.wiphy, 7874 &ifmgd->beacon_connection_loss_work); 7875 wiphy_work_cancel(sdata->local->hw.wiphy, 7876 &ifmgd->csa_connection_drop_work); 7877 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7878 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7879 &ifmgd->ml_reconf_work); 7880 7881 sdata_lock(sdata); 7882 if (ifmgd->assoc_data) 7883 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7884 if (ifmgd->auth_data) 7885 ieee80211_destroy_auth_data(sdata, false); 7886 spin_lock_bh(&ifmgd->teardown_lock); 7887 if (ifmgd->teardown_skb) { 7888 kfree_skb(ifmgd->teardown_skb); 7889 ifmgd->teardown_skb = NULL; 7890 ifmgd->orig_teardown_skb = NULL; 7891 } 7892 kfree(ifmgd->assoc_req_ies); 7893 ifmgd->assoc_req_ies = NULL; 7894 ifmgd->assoc_req_ies_len = 0; 7895 spin_unlock_bh(&ifmgd->teardown_lock); 7896 del_timer_sync(&ifmgd->timer); 7897 sdata_unlock(sdata); 7898 } 7899 ieee80211_cqm_rssi_notify(struct ieee80211_vif * vif,enum nl80211_cqm_rssi_threshold_event rssi_event,s32 rssi_level,gfp_t gfp)7900 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7901 enum nl80211_cqm_rssi_threshold_event rssi_event, 7902 s32 rssi_level, 7903 gfp_t gfp) 7904 { 7905 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7906 7907 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7908 7909 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7910 } 7911 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7912 ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif * vif,gfp_t gfp)7913 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7914 { 7915 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7916 7917 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7918 7919 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7920 } 7921 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7922 _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data * sdata,int rssi_min_thold,int rssi_max_thold)7923 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7924 int rssi_min_thold, 7925 int rssi_max_thold) 7926 { 7927 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7928 7929 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7930 return; 7931 7932 /* 7933 * Scale up threshold values before storing it, as the RSSI averaging 7934 * algorithm uses a scaled up value as well. Change this scaling 7935 * factor if the RSSI averaging algorithm changes. 7936 */ 7937 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7938 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7939 } 7940 ieee80211_enable_rssi_reports(struct ieee80211_vif * vif,int rssi_min_thold,int rssi_max_thold)7941 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7942 int rssi_min_thold, 7943 int rssi_max_thold) 7944 { 7945 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7946 7947 WARN_ON(rssi_min_thold == rssi_max_thold || 7948 rssi_min_thold > rssi_max_thold); 7949 7950 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7951 rssi_max_thold); 7952 } 7953 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7954 ieee80211_disable_rssi_reports(struct ieee80211_vif * vif)7955 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7956 { 7957 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7958 7959 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7960 } 7961 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7962