1 /* 2 * BSS client mode implementation 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 4 * Copyright 2004, Instant802 Networks, Inc. 5 * Copyright 2005, Devicescape Software, Inc. 6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #include <linux/delay.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/pm_qos.h> 23 #include <linux/crc32.h> 24 #include <linux/slab.h> 25 #include <linux/export.h> 26 #include <net/mac80211.h> 27 #include <asm/unaligned.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "led.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_MAX_TRIES 3 38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 42 #define IEEE80211_ASSOC_MAX_TRIES 3 43 44 static int max_nullfunc_tries = 2; 45 module_param(max_nullfunc_tries, int, 0644); 46 MODULE_PARM_DESC(max_nullfunc_tries, 47 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 48 49 static int max_probe_tries = 5; 50 module_param(max_probe_tries, int, 0644); 51 MODULE_PARM_DESC(max_probe_tries, 52 "Maximum probe tries before disconnecting (reason 4)."); 53 54 /* 55 * Beacon loss timeout is calculated as N frames times the 56 * advertised beacon interval. This may need to be somewhat 57 * higher than what hardware might detect to account for 58 * delays in the host processing frames. But since we also 59 * probe on beacon miss before declaring the connection lost 60 * default to what we want. 61 */ 62 static int beacon_loss_count = 7; 63 module_param(beacon_loss_count, int, 0644); 64 MODULE_PARM_DESC(beacon_loss_count, 65 "Number of beacon intervals before we decide beacon was lost."); 66 67 /* 68 * Time the connection can be idle before we probe 69 * it to see if we can still talk to the AP. 70 */ 71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 72 /* 73 * Time we wait for a probe response after sending 74 * a probe request because of beacon loss or for 75 * checking the connection still works. 76 */ 77 static int probe_wait_ms = 500; 78 module_param(probe_wait_ms, int, 0644); 79 MODULE_PARM_DESC(probe_wait_ms, 80 "Maximum time(ms) to wait for probe response" 81 " before disconnecting (reason 4)."); 82 83 /* 84 * Weight given to the latest Beacon frame when calculating average signal 85 * strength for Beacon frames received in the current BSS. This must be 86 * between 1 and 15. 87 */ 88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3 89 90 /* 91 * How many Beacon frames need to have been used in average signal strength 92 * before starting to indicate signal change events. 93 */ 94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 95 96 /* 97 * We can have multiple work items (and connection probing) 98 * scheduling this timer, but we need to take care to only 99 * reschedule it when it should fire _earlier_ than it was 100 * asked for before, or if it's not pending right now. This 101 * function ensures that. Note that it then is required to 102 * run this function for all timeouts after the first one 103 * has happened -- the work that runs from this timer will 104 * do that. 105 */ 106 static void run_again(struct ieee80211_sub_if_data *sdata, 107 unsigned long timeout) 108 { 109 sdata_assert_lock(sdata); 110 111 if (!timer_pending(&sdata->u.mgd.timer) || 112 time_before(timeout, sdata->u.mgd.timer.expires)) 113 mod_timer(&sdata->u.mgd.timer, timeout); 114 } 115 116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 117 { 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 119 return; 120 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 122 return; 123 124 mod_timer(&sdata->u.mgd.bcn_mon_timer, 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 126 } 127 128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 129 { 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 131 132 if (unlikely(!sdata->u.mgd.associated)) 133 return; 134 135 ifmgd->probe_send_count = 0; 136 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 138 return; 139 140 mod_timer(&sdata->u.mgd.conn_mon_timer, 141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 142 } 143 144 static int ecw2cw(int ecw) 145 { 146 return (1 << ecw) - 1; 147 } 148 149 static u32 150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 151 struct ieee80211_supported_band *sband, 152 struct ieee80211_channel *channel, 153 const struct ieee80211_ht_cap *ht_cap, 154 const struct ieee80211_ht_operation *ht_oper, 155 const struct ieee80211_vht_operation *vht_oper, 156 struct cfg80211_chan_def *chandef, bool tracking) 157 { 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 159 struct cfg80211_chan_def vht_chandef; 160 u32 ht_cfreq, ret; 161 162 chandef->chan = channel; 163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 164 chandef->center_freq1 = channel->center_freq; 165 chandef->center_freq2 = 0; 166 167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) { 168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 169 goto out; 170 } 171 172 chandef->width = NL80211_CHAN_WIDTH_20; 173 174 if (!(ht_cap->cap_info & 175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { 176 ret = IEEE80211_STA_DISABLE_40MHZ; 177 goto out; 178 } 179 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 181 channel->band); 182 /* check that channel matches the right operating channel */ 183 if (!tracking && channel->center_freq != ht_cfreq) { 184 /* 185 * It's possible that some APs are confused here; 186 * Netgear WNDR3700 sometimes reports 4 higher than 187 * the actual channel in association responses, but 188 * since we look at probe response/beacon data here 189 * it should be OK. 190 */ 191 sdata_info(sdata, 192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 193 channel->center_freq, ht_cfreq, 194 ht_oper->primary_chan, channel->band); 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 196 goto out; 197 } 198 199 /* check 40 MHz support, if we have it */ 200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 203 chandef->width = NL80211_CHAN_WIDTH_40; 204 chandef->center_freq1 += 10; 205 break; 206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 207 chandef->width = NL80211_CHAN_WIDTH_40; 208 chandef->center_freq1 -= 10; 209 break; 210 } 211 } else { 212 /* 40 MHz (and 80 MHz) must be supported for VHT */ 213 ret = IEEE80211_STA_DISABLE_VHT; 214 /* also mark 40 MHz disabled */ 215 ret |= IEEE80211_STA_DISABLE_40MHZ; 216 goto out; 217 } 218 219 if (!vht_oper || !sband->vht_cap.vht_supported) { 220 ret = IEEE80211_STA_DISABLE_VHT; 221 goto out; 222 } 223 224 vht_chandef.chan = channel; 225 vht_chandef.center_freq1 = 226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, 227 channel->band); 228 vht_chandef.center_freq2 = 0; 229 230 switch (vht_oper->chan_width) { 231 case IEEE80211_VHT_CHANWIDTH_USE_HT: 232 vht_chandef.width = chandef->width; 233 vht_chandef.center_freq1 = chandef->center_freq1; 234 break; 235 case IEEE80211_VHT_CHANWIDTH_80MHZ: 236 vht_chandef.width = NL80211_CHAN_WIDTH_80; 237 break; 238 case IEEE80211_VHT_CHANWIDTH_160MHZ: 239 vht_chandef.width = NL80211_CHAN_WIDTH_160; 240 break; 241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80; 243 vht_chandef.center_freq2 = 244 ieee80211_channel_to_frequency( 245 vht_oper->center_freq_seg2_idx, 246 channel->band); 247 break; 248 default: 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 250 sdata_info(sdata, 251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n", 252 vht_oper->chan_width); 253 ret = IEEE80211_STA_DISABLE_VHT; 254 goto out; 255 } 256 257 if (!cfg80211_chandef_valid(&vht_chandef)) { 258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 259 sdata_info(sdata, 260 "AP VHT information is invalid, disable VHT\n"); 261 ret = IEEE80211_STA_DISABLE_VHT; 262 goto out; 263 } 264 265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 266 ret = 0; 267 goto out; 268 } 269 270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 272 sdata_info(sdata, 273 "AP VHT information doesn't match HT, disable VHT\n"); 274 ret = IEEE80211_STA_DISABLE_VHT; 275 goto out; 276 } 277 278 *chandef = vht_chandef; 279 280 ret = 0; 281 282 out: 283 /* 284 * When tracking the current AP, don't do any further checks if the 285 * new chandef is identical to the one we're currently using for the 286 * connection. This keeps us from playing ping-pong with regulatory, 287 * without it the following can happen (for example): 288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 289 * - AP advertises regdom US 290 * - CRDA loads regdom US with 80 MHz prohibited (old database) 291 * - the code below detects an unsupported channel, downgrades, and 292 * we disconnect from the AP in the caller 293 * - disconnect causes CRDA to reload world regdomain and the game 294 * starts anew. 295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 296 * 297 * It seems possible that there are still scenarios with CSA or real 298 * bandwidth changes where a this could happen, but those cases are 299 * less common and wouldn't completely prevent using the AP. 300 */ 301 if (tracking && 302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 303 return ret; 304 305 /* don't print the message below for VHT mismatch if VHT is disabled */ 306 if (ret & IEEE80211_STA_DISABLE_VHT) 307 vht_chandef = *chandef; 308 309 /* 310 * Ignore the DISABLED flag when we're already connected and only 311 * tracking the APs beacon for bandwidth changes - otherwise we 312 * might get disconnected here if we connect to an AP, update our 313 * regulatory information based on the AP's country IE and the 314 * information we have is wrong/outdated and disables the channel 315 * that we're actually using for the connection to the AP. 316 */ 317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 318 tracking ? 0 : 319 IEEE80211_CHAN_DISABLED)) { 320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 321 ret = IEEE80211_STA_DISABLE_HT | 322 IEEE80211_STA_DISABLE_VHT; 323 break; 324 } 325 326 ret |= ieee80211_chandef_downgrade(chandef); 327 } 328 329 if (chandef->width != vht_chandef.width && !tracking) 330 sdata_info(sdata, 331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 332 333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 334 return ret; 335 } 336 337 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 338 struct sta_info *sta, 339 const struct ieee80211_ht_cap *ht_cap, 340 const struct ieee80211_ht_operation *ht_oper, 341 const struct ieee80211_vht_operation *vht_oper, 342 const u8 *bssid, u32 *changed) 343 { 344 struct ieee80211_local *local = sdata->local; 345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 346 struct ieee80211_supported_band *sband; 347 struct ieee80211_channel *chan; 348 struct cfg80211_chan_def chandef; 349 u16 ht_opmode; 350 u32 flags; 351 enum ieee80211_sta_rx_bandwidth new_sta_bw; 352 int ret; 353 354 /* if HT was/is disabled, don't track any bandwidth changes */ 355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 356 return 0; 357 358 /* don't check VHT if we associated as non-VHT station */ 359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 360 vht_oper = NULL; 361 362 if (WARN_ON_ONCE(!sta)) 363 return -EINVAL; 364 365 /* 366 * if bss configuration changed store the new one - 367 * this may be applicable even if channel is identical 368 */ 369 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 371 *changed |= BSS_CHANGED_HT; 372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 373 } 374 375 chan = sdata->vif.bss_conf.chandef.chan; 376 sband = local->hw.wiphy->bands[chan->band]; 377 378 /* calculate new channel (type) based on HT/VHT operation IEs */ 379 flags = ieee80211_determine_chantype(sdata, sband, chan, 380 ht_cap, ht_oper, vht_oper, 381 &chandef, true); 382 383 /* 384 * Downgrade the new channel if we associated with restricted 385 * capabilities. For example, if we associated as a 20 MHz STA 386 * to a 40 MHz AP (due to regulatory, capabilities or config 387 * reasons) then switching to a 40 MHz channel now won't do us 388 * any good -- we couldn't use it with the AP. 389 */ 390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 391 chandef.width == NL80211_CHAN_WIDTH_80P80) 392 flags |= ieee80211_chandef_downgrade(&chandef); 393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 394 chandef.width == NL80211_CHAN_WIDTH_160) 395 flags |= ieee80211_chandef_downgrade(&chandef); 396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 397 chandef.width > NL80211_CHAN_WIDTH_20) 398 flags |= ieee80211_chandef_downgrade(&chandef); 399 400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 401 return 0; 402 403 sdata_info(sdata, 404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 405 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 406 chandef.center_freq1, chandef.center_freq2); 407 408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 409 IEEE80211_STA_DISABLE_VHT | 410 IEEE80211_STA_DISABLE_40MHZ | 411 IEEE80211_STA_DISABLE_80P80MHZ | 412 IEEE80211_STA_DISABLE_160MHZ)) || 413 !cfg80211_chandef_valid(&chandef)) { 414 sdata_info(sdata, 415 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 416 ifmgd->bssid); 417 return -EINVAL; 418 } 419 420 switch (chandef.width) { 421 case NL80211_CHAN_WIDTH_20_NOHT: 422 case NL80211_CHAN_WIDTH_20: 423 new_sta_bw = IEEE80211_STA_RX_BW_20; 424 break; 425 case NL80211_CHAN_WIDTH_40: 426 new_sta_bw = IEEE80211_STA_RX_BW_40; 427 break; 428 case NL80211_CHAN_WIDTH_80: 429 new_sta_bw = IEEE80211_STA_RX_BW_80; 430 break; 431 case NL80211_CHAN_WIDTH_80P80: 432 case NL80211_CHAN_WIDTH_160: 433 new_sta_bw = IEEE80211_STA_RX_BW_160; 434 break; 435 default: 436 return -EINVAL; 437 } 438 439 if (new_sta_bw > sta->cur_max_bandwidth) 440 new_sta_bw = sta->cur_max_bandwidth; 441 442 if (new_sta_bw < sta->sta.bandwidth) { 443 sta->sta.bandwidth = new_sta_bw; 444 rate_control_rate_update(local, sband, sta, 445 IEEE80211_RC_BW_CHANGED); 446 } 447 448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 449 if (ret) { 450 sdata_info(sdata, 451 "AP %pM changed bandwidth to incompatible one - disconnect\n", 452 ifmgd->bssid); 453 return ret; 454 } 455 456 if (new_sta_bw > sta->sta.bandwidth) { 457 sta->sta.bandwidth = new_sta_bw; 458 rate_control_rate_update(local, sband, sta, 459 IEEE80211_RC_BW_CHANGED); 460 } 461 462 return 0; 463 } 464 465 /* frame sending functions */ 466 467 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 468 struct sk_buff *skb, u8 ap_ht_param, 469 struct ieee80211_supported_band *sband, 470 struct ieee80211_channel *channel, 471 enum ieee80211_smps_mode smps) 472 { 473 u8 *pos; 474 u32 flags = channel->flags; 475 u16 cap; 476 struct ieee80211_sta_ht_cap ht_cap; 477 478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 479 480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 481 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 482 483 /* determine capability flags */ 484 cap = ht_cap.cap; 485 486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 490 cap &= ~IEEE80211_HT_CAP_SGI_40; 491 } 492 break; 493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 496 cap &= ~IEEE80211_HT_CAP_SGI_40; 497 } 498 break; 499 } 500 501 /* 502 * If 40 MHz was disabled associate as though we weren't 503 * capable of 40 MHz -- some broken APs will never fall 504 * back to trying to transmit in 20 MHz. 505 */ 506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 508 cap &= ~IEEE80211_HT_CAP_SGI_40; 509 } 510 511 /* set SM PS mode properly */ 512 cap &= ~IEEE80211_HT_CAP_SM_PS; 513 switch (smps) { 514 case IEEE80211_SMPS_AUTOMATIC: 515 case IEEE80211_SMPS_NUM_MODES: 516 WARN_ON(1); 517 case IEEE80211_SMPS_OFF: 518 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 519 IEEE80211_HT_CAP_SM_PS_SHIFT; 520 break; 521 case IEEE80211_SMPS_STATIC: 522 cap |= WLAN_HT_CAP_SM_PS_STATIC << 523 IEEE80211_HT_CAP_SM_PS_SHIFT; 524 break; 525 case IEEE80211_SMPS_DYNAMIC: 526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 527 IEEE80211_HT_CAP_SM_PS_SHIFT; 528 break; 529 } 530 531 /* reserve and fill IE */ 532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 534 } 535 536 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 537 struct sk_buff *skb, 538 struct ieee80211_supported_band *sband, 539 struct ieee80211_vht_cap *ap_vht_cap) 540 { 541 u8 *pos; 542 u32 cap; 543 struct ieee80211_sta_vht_cap vht_cap; 544 u32 mask, ap_bf_sts, our_bf_sts; 545 546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 547 548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 550 551 /* determine capability flags */ 552 cap = vht_cap.cap; 553 554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ; 556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 557 } 558 559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 562 } 563 564 /* 565 * Some APs apparently get confused if our capabilities are better 566 * than theirs, so restrict what we advertise in the assoc request. 567 */ 568 if (!(ap_vht_cap->vht_cap_info & 569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; 571 572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 573 574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 575 our_bf_sts = cap & mask; 576 577 if (ap_bf_sts < our_bf_sts) { 578 cap &= ~mask; 579 cap |= ap_bf_sts; 580 } 581 582 /* reserve and fill IE */ 583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 585 } 586 587 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 588 { 589 struct ieee80211_local *local = sdata->local; 590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 592 struct sk_buff *skb; 593 struct ieee80211_mgmt *mgmt; 594 u8 *pos, qos_info; 595 size_t offset = 0, noffset; 596 int i, count, rates_len, supp_rates_len, shift; 597 u16 capab; 598 struct ieee80211_supported_band *sband; 599 struct ieee80211_chanctx_conf *chanctx_conf; 600 struct ieee80211_channel *chan; 601 u32 rate_flags, rates = 0; 602 603 sdata_assert_lock(sdata); 604 605 rcu_read_lock(); 606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 607 if (WARN_ON(!chanctx_conf)) { 608 rcu_read_unlock(); 609 return; 610 } 611 chan = chanctx_conf->def.chan; 612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 613 rcu_read_unlock(); 614 sband = local->hw.wiphy->bands[chan->band]; 615 shift = ieee80211_vif_get_shift(&sdata->vif); 616 617 if (assoc_data->supp_rates_len) { 618 /* 619 * Get all rates supported by the device and the AP as 620 * some APs don't like getting a superset of their rates 621 * in the association request (e.g. D-Link DAP 1353 in 622 * b-only mode)... 623 */ 624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 625 assoc_data->supp_rates, 626 assoc_data->supp_rates_len, 627 &rates); 628 } else { 629 /* 630 * In case AP not provide any supported rates information 631 * before association, we send information element(s) with 632 * all rates that we support. 633 */ 634 rates_len = 0; 635 for (i = 0; i < sband->n_bitrates; i++) { 636 if ((rate_flags & sband->bitrates[i].flags) 637 != rate_flags) 638 continue; 639 rates |= BIT(i); 640 rates_len++; 641 } 642 } 643 644 skb = alloc_skb(local->hw.extra_tx_headroom + 645 sizeof(*mgmt) + /* bit too much but doesn't matter */ 646 2 + assoc_data->ssid_len + /* SSID */ 647 4 + rates_len + /* (extended) rates */ 648 4 + /* power capability */ 649 2 + 2 * sband->n_channels + /* supported channels */ 650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 652 assoc_data->ie_len + /* extra IEs */ 653 9, /* WMM */ 654 GFP_KERNEL); 655 if (!skb) 656 return; 657 658 skb_reserve(skb, local->hw.extra_tx_headroom); 659 660 capab = WLAN_CAPABILITY_ESS; 661 662 if (sband->band == IEEE80211_BAND_2GHZ) { 663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) 664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) 666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 667 } 668 669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 670 capab |= WLAN_CAPABILITY_PRIVACY; 671 672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) 674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 675 676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 677 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 678 679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); 680 memset(mgmt, 0, 24); 681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 684 685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 686 skb_put(skb, 10); 687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 688 IEEE80211_STYPE_REASSOC_REQ); 689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 690 mgmt->u.reassoc_req.listen_interval = 691 cpu_to_le16(local->hw.conf.listen_interval); 692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 693 ETH_ALEN); 694 } else { 695 skb_put(skb, 4); 696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 697 IEEE80211_STYPE_ASSOC_REQ); 698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 699 mgmt->u.assoc_req.listen_interval = 700 cpu_to_le16(local->hw.conf.listen_interval); 701 } 702 703 /* SSID */ 704 pos = skb_put(skb, 2 + assoc_data->ssid_len); 705 *pos++ = WLAN_EID_SSID; 706 *pos++ = assoc_data->ssid_len; 707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 708 709 /* add all rates which were marked to be used above */ 710 supp_rates_len = rates_len; 711 if (supp_rates_len > 8) 712 supp_rates_len = 8; 713 714 pos = skb_put(skb, supp_rates_len + 2); 715 *pos++ = WLAN_EID_SUPP_RATES; 716 *pos++ = supp_rates_len; 717 718 count = 0; 719 for (i = 0; i < sband->n_bitrates; i++) { 720 if (BIT(i) & rates) { 721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 722 5 * (1 << shift)); 723 *pos++ = (u8) rate; 724 if (++count == 8) 725 break; 726 } 727 } 728 729 if (rates_len > count) { 730 pos = skb_put(skb, rates_len - count + 2); 731 *pos++ = WLAN_EID_EXT_SUPP_RATES; 732 *pos++ = rates_len - count; 733 734 for (i++; i < sband->n_bitrates; i++) { 735 if (BIT(i) & rates) { 736 int rate; 737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 738 5 * (1 << shift)); 739 *pos++ = (u8) rate; 740 } 741 } 742 } 743 744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 745 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 746 pos = skb_put(skb, 4); 747 *pos++ = WLAN_EID_PWR_CAPABILITY; 748 *pos++ = 2; 749 *pos++ = 0; /* min tx power */ 750 /* max tx power */ 751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 752 } 753 754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 755 /* TODO: get this in reg domain format */ 756 pos = skb_put(skb, 2 * sband->n_channels + 2); 757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 758 *pos++ = 2 * sband->n_channels; 759 for (i = 0; i < sband->n_channels; i++) { 760 *pos++ = ieee80211_frequency_to_channel( 761 sband->channels[i].center_freq); 762 *pos++ = 1; /* one channel in the subband*/ 763 } 764 } 765 766 /* if present, add any custom IEs that go before HT */ 767 if (assoc_data->ie_len) { 768 static const u8 before_ht[] = { 769 WLAN_EID_SSID, 770 WLAN_EID_SUPP_RATES, 771 WLAN_EID_EXT_SUPP_RATES, 772 WLAN_EID_PWR_CAPABILITY, 773 WLAN_EID_SUPPORTED_CHANNELS, 774 WLAN_EID_RSN, 775 WLAN_EID_QOS_CAPA, 776 WLAN_EID_RRM_ENABLED_CAPABILITIES, 777 WLAN_EID_MOBILITY_DOMAIN, 778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 779 }; 780 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 781 before_ht, ARRAY_SIZE(before_ht), 782 offset); 783 pos = skb_put(skb, noffset - offset); 784 memcpy(pos, assoc_data->ie + offset, noffset - offset); 785 offset = noffset; 786 } 787 788 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 789 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 790 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 791 792 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 793 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 794 sband, chan, sdata->smps_mode); 795 796 /* if present, add any custom IEs that go before VHT */ 797 if (assoc_data->ie_len) { 798 static const u8 before_vht[] = { 799 WLAN_EID_SSID, 800 WLAN_EID_SUPP_RATES, 801 WLAN_EID_EXT_SUPP_RATES, 802 WLAN_EID_PWR_CAPABILITY, 803 WLAN_EID_SUPPORTED_CHANNELS, 804 WLAN_EID_RSN, 805 WLAN_EID_QOS_CAPA, 806 WLAN_EID_RRM_ENABLED_CAPABILITIES, 807 WLAN_EID_MOBILITY_DOMAIN, 808 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 809 WLAN_EID_HT_CAPABILITY, 810 WLAN_EID_BSS_COEX_2040, 811 WLAN_EID_EXT_CAPABILITY, 812 WLAN_EID_QOS_TRAFFIC_CAPA, 813 WLAN_EID_TIM_BCAST_REQ, 814 WLAN_EID_INTERWORKING, 815 }; 816 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 817 before_vht, ARRAY_SIZE(before_vht), 818 offset); 819 pos = skb_put(skb, noffset - offset); 820 memcpy(pos, assoc_data->ie + offset, noffset - offset); 821 offset = noffset; 822 } 823 824 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 825 ieee80211_add_vht_ie(sdata, skb, sband, 826 &assoc_data->ap_vht_cap); 827 828 /* if present, add any custom non-vendor IEs that go after HT */ 829 if (assoc_data->ie_len) { 830 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 831 assoc_data->ie_len, 832 offset); 833 pos = skb_put(skb, noffset - offset); 834 memcpy(pos, assoc_data->ie + offset, noffset - offset); 835 offset = noffset; 836 } 837 838 if (assoc_data->wmm) { 839 if (assoc_data->uapsd) { 840 qos_info = ifmgd->uapsd_queues; 841 qos_info |= (ifmgd->uapsd_max_sp_len << 842 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 843 } else { 844 qos_info = 0; 845 } 846 847 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 848 } 849 850 /* add any remaining custom (i.e. vendor specific here) IEs */ 851 if (assoc_data->ie_len) { 852 noffset = assoc_data->ie_len; 853 pos = skb_put(skb, noffset - offset); 854 memcpy(pos, assoc_data->ie + offset, noffset - offset); 855 } 856 857 drv_mgd_prepare_tx(local, sdata); 858 859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 860 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 862 IEEE80211_TX_INTFL_MLME_CONN_TX; 863 ieee80211_tx_skb(sdata, skb); 864 } 865 866 void ieee80211_send_pspoll(struct ieee80211_local *local, 867 struct ieee80211_sub_if_data *sdata) 868 { 869 struct ieee80211_pspoll *pspoll; 870 struct sk_buff *skb; 871 872 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 873 if (!skb) 874 return; 875 876 pspoll = (struct ieee80211_pspoll *) skb->data; 877 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 878 879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 880 ieee80211_tx_skb(sdata, skb); 881 } 882 883 void ieee80211_send_nullfunc(struct ieee80211_local *local, 884 struct ieee80211_sub_if_data *sdata, 885 int powersave) 886 { 887 struct sk_buff *skb; 888 struct ieee80211_hdr_3addr *nullfunc; 889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 890 891 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 892 if (!skb) 893 return; 894 895 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 896 if (powersave) 897 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 898 899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 900 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 901 902 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 904 905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 907 908 ieee80211_tx_skb(sdata, skb); 909 } 910 911 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 912 struct ieee80211_sub_if_data *sdata) 913 { 914 struct sk_buff *skb; 915 struct ieee80211_hdr *nullfunc; 916 __le16 fc; 917 918 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 919 return; 920 921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 922 if (!skb) 923 return; 924 925 skb_reserve(skb, local->hw.extra_tx_headroom); 926 927 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); 928 memset(nullfunc, 0, 30); 929 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 930 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 931 nullfunc->frame_control = fc; 932 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 933 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 934 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 935 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 936 937 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 938 ieee80211_tx_skb(sdata, skb); 939 } 940 941 /* spectrum management related things */ 942 static void ieee80211_chswitch_work(struct work_struct *work) 943 { 944 struct ieee80211_sub_if_data *sdata = 945 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 946 struct ieee80211_local *local = sdata->local; 947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 948 int ret; 949 950 if (!ieee80211_sdata_running(sdata)) 951 return; 952 953 sdata_lock(sdata); 954 mutex_lock(&local->mtx); 955 mutex_lock(&local->chanctx_mtx); 956 957 if (!ifmgd->associated) 958 goto out; 959 960 if (!sdata->vif.csa_active) 961 goto out; 962 963 /* 964 * using reservation isn't immediate as it may be deferred until later 965 * with multi-vif. once reservation is complete it will re-schedule the 966 * work with no reserved_chanctx so verify chandef to check if it 967 * completed successfully 968 */ 969 970 if (sdata->reserved_chanctx) { 971 /* 972 * with multi-vif csa driver may call ieee80211_csa_finish() 973 * many times while waiting for other interfaces to use their 974 * reservations 975 */ 976 if (sdata->reserved_ready) 977 goto out; 978 979 ret = ieee80211_vif_use_reserved_context(sdata); 980 if (ret) { 981 sdata_info(sdata, 982 "failed to use reserved channel context, disconnecting (err=%d)\n", 983 ret); 984 ieee80211_queue_work(&sdata->local->hw, 985 &ifmgd->csa_connection_drop_work); 986 goto out; 987 } 988 989 goto out; 990 } 991 992 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 993 &sdata->csa_chandef)) { 994 sdata_info(sdata, 995 "failed to finalize channel switch, disconnecting\n"); 996 ieee80211_queue_work(&sdata->local->hw, 997 &ifmgd->csa_connection_drop_work); 998 goto out; 999 } 1000 1001 /* XXX: shouldn't really modify cfg80211-owned data! */ 1002 ifmgd->associated->channel = sdata->csa_chandef.chan; 1003 1004 sdata->vif.csa_active = false; 1005 1006 /* XXX: wait for a beacon first? */ 1007 if (sdata->csa_block_tx) { 1008 ieee80211_wake_vif_queues(local, sdata, 1009 IEEE80211_QUEUE_STOP_REASON_CSA); 1010 sdata->csa_block_tx = false; 1011 } 1012 1013 ieee80211_sta_reset_beacon_monitor(sdata); 1014 ieee80211_sta_reset_conn_monitor(sdata); 1015 1016 out: 1017 mutex_unlock(&local->chanctx_mtx); 1018 mutex_unlock(&local->mtx); 1019 sdata_unlock(sdata); 1020 } 1021 1022 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1023 { 1024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1026 1027 trace_api_chswitch_done(sdata, success); 1028 if (!success) { 1029 sdata_info(sdata, 1030 "driver channel switch failed, disconnecting\n"); 1031 ieee80211_queue_work(&sdata->local->hw, 1032 &ifmgd->csa_connection_drop_work); 1033 } else { 1034 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1035 } 1036 } 1037 EXPORT_SYMBOL(ieee80211_chswitch_done); 1038 1039 static void ieee80211_chswitch_timer(unsigned long data) 1040 { 1041 struct ieee80211_sub_if_data *sdata = 1042 (struct ieee80211_sub_if_data *) data; 1043 1044 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1045 } 1046 1047 static void 1048 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1049 u64 timestamp, struct ieee802_11_elems *elems, 1050 bool beacon) 1051 { 1052 struct ieee80211_local *local = sdata->local; 1053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1054 struct cfg80211_bss *cbss = ifmgd->associated; 1055 struct ieee80211_chanctx_conf *conf; 1056 struct ieee80211_chanctx *chanctx; 1057 enum ieee80211_band current_band; 1058 struct ieee80211_csa_ie csa_ie; 1059 int res; 1060 1061 sdata_assert_lock(sdata); 1062 1063 if (!cbss) 1064 return; 1065 1066 if (local->scanning) 1067 return; 1068 1069 /* disregard subsequent announcements if we are already processing */ 1070 if (sdata->vif.csa_active) 1071 return; 1072 1073 current_band = cbss->channel->band; 1074 memset(&csa_ie, 0, sizeof(csa_ie)); 1075 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band, 1076 ifmgd->flags, 1077 ifmgd->associated->bssid, &csa_ie); 1078 if (res < 0) 1079 ieee80211_queue_work(&local->hw, 1080 &ifmgd->csa_connection_drop_work); 1081 if (res) 1082 return; 1083 1084 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1085 IEEE80211_CHAN_DISABLED)) { 1086 sdata_info(sdata, 1087 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1088 ifmgd->associated->bssid, 1089 csa_ie.chandef.chan->center_freq, 1090 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1091 csa_ie.chandef.center_freq2); 1092 ieee80211_queue_work(&local->hw, 1093 &ifmgd->csa_connection_drop_work); 1094 return; 1095 } 1096 1097 mutex_lock(&local->mtx); 1098 mutex_lock(&local->chanctx_mtx); 1099 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1100 lockdep_is_held(&local->chanctx_mtx)); 1101 if (!conf) { 1102 sdata_info(sdata, 1103 "no channel context assigned to vif?, disconnecting\n"); 1104 ieee80211_queue_work(&local->hw, 1105 &ifmgd->csa_connection_drop_work); 1106 mutex_unlock(&local->chanctx_mtx); 1107 mutex_unlock(&local->mtx); 1108 return; 1109 } 1110 1111 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1112 1113 if (local->use_chanctx) { 1114 u32 num_chanctx = 0; 1115 list_for_each_entry(chanctx, &local->chanctx_list, list) 1116 num_chanctx++; 1117 1118 if (num_chanctx > 1 || 1119 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) { 1120 sdata_info(sdata, 1121 "not handling chan-switch with channel contexts\n"); 1122 ieee80211_queue_work(&local->hw, 1123 &ifmgd->csa_connection_drop_work); 1124 mutex_unlock(&local->chanctx_mtx); 1125 mutex_unlock(&local->mtx); 1126 return; 1127 } 1128 } 1129 1130 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1131 chanctx->mode, false); 1132 if (res) { 1133 sdata_info(sdata, 1134 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1135 res); 1136 ieee80211_queue_work(&local->hw, 1137 &ifmgd->csa_connection_drop_work); 1138 mutex_unlock(&local->chanctx_mtx); 1139 mutex_unlock(&local->mtx); 1140 return; 1141 } 1142 mutex_unlock(&local->chanctx_mtx); 1143 1144 sdata->vif.csa_active = true; 1145 sdata->csa_chandef = csa_ie.chandef; 1146 sdata->csa_block_tx = csa_ie.mode; 1147 1148 if (sdata->csa_block_tx) 1149 ieee80211_stop_vif_queues(local, sdata, 1150 IEEE80211_QUEUE_STOP_REASON_CSA); 1151 mutex_unlock(&local->mtx); 1152 1153 if (local->ops->channel_switch) { 1154 /* use driver's channel switch callback */ 1155 struct ieee80211_channel_switch ch_switch = { 1156 .timestamp = timestamp, 1157 .block_tx = csa_ie.mode, 1158 .chandef = csa_ie.chandef, 1159 .count = csa_ie.count, 1160 }; 1161 1162 drv_channel_switch(local, &ch_switch); 1163 return; 1164 } 1165 1166 /* channel switch handled in software */ 1167 if (csa_ie.count <= 1) 1168 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1169 else 1170 mod_timer(&ifmgd->chswitch_timer, 1171 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval)); 1172 } 1173 1174 static bool 1175 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1176 struct ieee80211_channel *channel, 1177 const u8 *country_ie, u8 country_ie_len, 1178 const u8 *pwr_constr_elem, 1179 int *chan_pwr, int *pwr_reduction) 1180 { 1181 struct ieee80211_country_ie_triplet *triplet; 1182 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1183 int i, chan_increment; 1184 bool have_chan_pwr = false; 1185 1186 /* Invalid IE */ 1187 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1188 return false; 1189 1190 triplet = (void *)(country_ie + 3); 1191 country_ie_len -= 3; 1192 1193 switch (channel->band) { 1194 default: 1195 WARN_ON_ONCE(1); 1196 /* fall through */ 1197 case IEEE80211_BAND_2GHZ: 1198 case IEEE80211_BAND_60GHZ: 1199 chan_increment = 1; 1200 break; 1201 case IEEE80211_BAND_5GHZ: 1202 chan_increment = 4; 1203 break; 1204 } 1205 1206 /* find channel */ 1207 while (country_ie_len >= 3) { 1208 u8 first_channel = triplet->chans.first_channel; 1209 1210 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1211 goto next; 1212 1213 for (i = 0; i < triplet->chans.num_channels; i++) { 1214 if (first_channel + i * chan_increment == chan) { 1215 have_chan_pwr = true; 1216 *chan_pwr = triplet->chans.max_power; 1217 break; 1218 } 1219 } 1220 if (have_chan_pwr) 1221 break; 1222 1223 next: 1224 triplet++; 1225 country_ie_len -= 3; 1226 } 1227 1228 if (have_chan_pwr) 1229 *pwr_reduction = *pwr_constr_elem; 1230 return have_chan_pwr; 1231 } 1232 1233 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1234 struct ieee80211_channel *channel, 1235 const u8 *cisco_dtpc_ie, 1236 int *pwr_level) 1237 { 1238 /* From practical testing, the first data byte of the DTPC element 1239 * seems to contain the requested dBm level, and the CLI on Cisco 1240 * APs clearly state the range is -127 to 127 dBm, which indicates 1241 * a signed byte, although it seemingly never actually goes negative. 1242 * The other byte seems to always be zero. 1243 */ 1244 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1245 } 1246 1247 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1248 struct ieee80211_channel *channel, 1249 struct ieee80211_mgmt *mgmt, 1250 const u8 *country_ie, u8 country_ie_len, 1251 const u8 *pwr_constr_ie, 1252 const u8 *cisco_dtpc_ie) 1253 { 1254 bool has_80211h_pwr = false, has_cisco_pwr = false; 1255 int chan_pwr = 0, pwr_reduction_80211h = 0; 1256 int pwr_level_cisco, pwr_level_80211h; 1257 int new_ap_level; 1258 1259 if (country_ie && pwr_constr_ie && 1260 mgmt->u.probe_resp.capab_info & 1261 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) { 1262 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1263 sdata, channel, country_ie, country_ie_len, 1264 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1265 pwr_level_80211h = 1266 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1267 } 1268 1269 if (cisco_dtpc_ie) { 1270 ieee80211_find_cisco_dtpc( 1271 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1272 has_cisco_pwr = true; 1273 } 1274 1275 if (!has_80211h_pwr && !has_cisco_pwr) 1276 return 0; 1277 1278 /* If we have both 802.11h and Cisco DTPC, apply both limits 1279 * by picking the smallest of the two power levels advertised. 1280 */ 1281 if (has_80211h_pwr && 1282 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1283 sdata_info(sdata, 1284 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1285 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1286 sdata->u.mgd.bssid); 1287 new_ap_level = pwr_level_80211h; 1288 } else { /* has_cisco_pwr is always true here. */ 1289 sdata_info(sdata, 1290 "Limiting TX power to %d dBm as advertised by %pM\n", 1291 pwr_level_cisco, sdata->u.mgd.bssid); 1292 new_ap_level = pwr_level_cisco; 1293 } 1294 1295 if (sdata->ap_power_level == new_ap_level) 1296 return 0; 1297 1298 sdata->ap_power_level = new_ap_level; 1299 if (__ieee80211_recalc_txpower(sdata)) 1300 return BSS_CHANGED_TXPOWER; 1301 return 0; 1302 } 1303 1304 /* powersave */ 1305 static void ieee80211_enable_ps(struct ieee80211_local *local, 1306 struct ieee80211_sub_if_data *sdata) 1307 { 1308 struct ieee80211_conf *conf = &local->hw.conf; 1309 1310 /* 1311 * If we are scanning right now then the parameters will 1312 * take effect when scan finishes. 1313 */ 1314 if (local->scanning) 1315 return; 1316 1317 if (conf->dynamic_ps_timeout > 0 && 1318 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { 1319 mod_timer(&local->dynamic_ps_timer, jiffies + 1320 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1321 } else { 1322 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 1323 ieee80211_send_nullfunc(local, sdata, 1); 1324 1325 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && 1326 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) 1327 return; 1328 1329 conf->flags |= IEEE80211_CONF_PS; 1330 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1331 } 1332 } 1333 1334 static void ieee80211_change_ps(struct ieee80211_local *local) 1335 { 1336 struct ieee80211_conf *conf = &local->hw.conf; 1337 1338 if (local->ps_sdata) { 1339 ieee80211_enable_ps(local, local->ps_sdata); 1340 } else if (conf->flags & IEEE80211_CONF_PS) { 1341 conf->flags &= ~IEEE80211_CONF_PS; 1342 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1343 del_timer_sync(&local->dynamic_ps_timer); 1344 cancel_work_sync(&local->dynamic_ps_enable_work); 1345 } 1346 } 1347 1348 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1349 { 1350 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1351 struct sta_info *sta = NULL; 1352 bool authorized = false; 1353 1354 if (!mgd->powersave) 1355 return false; 1356 1357 if (mgd->broken_ap) 1358 return false; 1359 1360 if (!mgd->associated) 1361 return false; 1362 1363 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1364 return false; 1365 1366 if (!mgd->have_beacon) 1367 return false; 1368 1369 rcu_read_lock(); 1370 sta = sta_info_get(sdata, mgd->bssid); 1371 if (sta) 1372 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1373 rcu_read_unlock(); 1374 1375 return authorized; 1376 } 1377 1378 /* need to hold RTNL or interface lock */ 1379 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) 1380 { 1381 struct ieee80211_sub_if_data *sdata, *found = NULL; 1382 int count = 0; 1383 int timeout; 1384 1385 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { 1386 local->ps_sdata = NULL; 1387 return; 1388 } 1389 1390 list_for_each_entry(sdata, &local->interfaces, list) { 1391 if (!ieee80211_sdata_running(sdata)) 1392 continue; 1393 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1394 /* If an AP vif is found, then disable PS 1395 * by setting the count to zero thereby setting 1396 * ps_sdata to NULL. 1397 */ 1398 count = 0; 1399 break; 1400 } 1401 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1402 continue; 1403 found = sdata; 1404 count++; 1405 } 1406 1407 if (count == 1 && ieee80211_powersave_allowed(found)) { 1408 s32 beaconint_us; 1409 1410 if (latency < 0) 1411 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); 1412 1413 beaconint_us = ieee80211_tu_to_usec( 1414 found->vif.bss_conf.beacon_int); 1415 1416 timeout = local->dynamic_ps_forced_timeout; 1417 if (timeout < 0) { 1418 /* 1419 * Go to full PSM if the user configures a very low 1420 * latency requirement. 1421 * The 2000 second value is there for compatibility 1422 * until the PM_QOS_NETWORK_LATENCY is configured 1423 * with real values. 1424 */ 1425 if (latency > (1900 * USEC_PER_MSEC) && 1426 latency != (2000 * USEC_PER_SEC)) 1427 timeout = 0; 1428 else 1429 timeout = 100; 1430 } 1431 local->hw.conf.dynamic_ps_timeout = timeout; 1432 1433 if (beaconint_us > latency) { 1434 local->ps_sdata = NULL; 1435 } else { 1436 int maxslp = 1; 1437 u8 dtimper = found->u.mgd.dtim_period; 1438 1439 /* If the TIM IE is invalid, pretend the value is 1 */ 1440 if (!dtimper) 1441 dtimper = 1; 1442 else if (dtimper > 1) 1443 maxslp = min_t(int, dtimper, 1444 latency / beaconint_us); 1445 1446 local->hw.conf.max_sleep_period = maxslp; 1447 local->hw.conf.ps_dtim_period = dtimper; 1448 local->ps_sdata = found; 1449 } 1450 } else { 1451 local->ps_sdata = NULL; 1452 } 1453 1454 ieee80211_change_ps(local); 1455 } 1456 1457 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1458 { 1459 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1460 1461 if (sdata->vif.bss_conf.ps != ps_allowed) { 1462 sdata->vif.bss_conf.ps = ps_allowed; 1463 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1464 } 1465 } 1466 1467 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1468 { 1469 struct ieee80211_local *local = 1470 container_of(work, struct ieee80211_local, 1471 dynamic_ps_disable_work); 1472 1473 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1474 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1475 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1476 } 1477 1478 ieee80211_wake_queues_by_reason(&local->hw, 1479 IEEE80211_MAX_QUEUE_MAP, 1480 IEEE80211_QUEUE_STOP_REASON_PS, 1481 false); 1482 } 1483 1484 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1485 { 1486 struct ieee80211_local *local = 1487 container_of(work, struct ieee80211_local, 1488 dynamic_ps_enable_work); 1489 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1490 struct ieee80211_if_managed *ifmgd; 1491 unsigned long flags; 1492 int q; 1493 1494 /* can only happen when PS was just disabled anyway */ 1495 if (!sdata) 1496 return; 1497 1498 ifmgd = &sdata->u.mgd; 1499 1500 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1501 return; 1502 1503 if (local->hw.conf.dynamic_ps_timeout > 0) { 1504 /* don't enter PS if TX frames are pending */ 1505 if (drv_tx_frames_pending(local)) { 1506 mod_timer(&local->dynamic_ps_timer, jiffies + 1507 msecs_to_jiffies( 1508 local->hw.conf.dynamic_ps_timeout)); 1509 return; 1510 } 1511 1512 /* 1513 * transmission can be stopped by others which leads to 1514 * dynamic_ps_timer expiry. Postpone the ps timer if it 1515 * is not the actual idle state. 1516 */ 1517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1518 for (q = 0; q < local->hw.queues; q++) { 1519 if (local->queue_stop_reasons[q]) { 1520 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1521 flags); 1522 mod_timer(&local->dynamic_ps_timer, jiffies + 1523 msecs_to_jiffies( 1524 local->hw.conf.dynamic_ps_timeout)); 1525 return; 1526 } 1527 } 1528 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1529 } 1530 1531 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && 1532 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1533 if (drv_tx_frames_pending(local)) { 1534 mod_timer(&local->dynamic_ps_timer, jiffies + 1535 msecs_to_jiffies( 1536 local->hw.conf.dynamic_ps_timeout)); 1537 } else { 1538 ieee80211_send_nullfunc(local, sdata, 1); 1539 /* Flush to get the tx status of nullfunc frame */ 1540 ieee80211_flush_queues(local, sdata); 1541 } 1542 } 1543 1544 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && 1545 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || 1546 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1547 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1548 local->hw.conf.flags |= IEEE80211_CONF_PS; 1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1550 } 1551 } 1552 1553 void ieee80211_dynamic_ps_timer(unsigned long data) 1554 { 1555 struct ieee80211_local *local = (void *) data; 1556 1557 if (local->quiescing || local->suspended) 1558 return; 1559 1560 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1561 } 1562 1563 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1564 { 1565 struct delayed_work *delayed_work = 1566 container_of(work, struct delayed_work, work); 1567 struct ieee80211_sub_if_data *sdata = 1568 container_of(delayed_work, struct ieee80211_sub_if_data, 1569 dfs_cac_timer_work); 1570 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1571 1572 mutex_lock(&sdata->local->mtx); 1573 if (sdata->wdev.cac_started) { 1574 ieee80211_vif_release_channel(sdata); 1575 cfg80211_cac_event(sdata->dev, &chandef, 1576 NL80211_RADAR_CAC_FINISHED, 1577 GFP_KERNEL); 1578 } 1579 mutex_unlock(&sdata->local->mtx); 1580 } 1581 1582 /* MLME */ 1583 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1584 struct ieee80211_sub_if_data *sdata, 1585 const u8 *wmm_param, size_t wmm_param_len) 1586 { 1587 struct ieee80211_tx_queue_params params; 1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1589 size_t left; 1590 int count; 1591 const u8 *pos; 1592 u8 uapsd_queues = 0; 1593 1594 if (!local->ops->conf_tx) 1595 return false; 1596 1597 if (local->hw.queues < IEEE80211_NUM_ACS) 1598 return false; 1599 1600 if (!wmm_param) 1601 return false; 1602 1603 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1604 return false; 1605 1606 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1607 uapsd_queues = ifmgd->uapsd_queues; 1608 1609 count = wmm_param[6] & 0x0f; 1610 if (count == ifmgd->wmm_last_param_set) 1611 return false; 1612 ifmgd->wmm_last_param_set = count; 1613 1614 pos = wmm_param + 8; 1615 left = wmm_param_len - 8; 1616 1617 memset(¶ms, 0, sizeof(params)); 1618 1619 sdata->wmm_acm = 0; 1620 for (; left >= 4; left -= 4, pos += 4) { 1621 int aci = (pos[0] >> 5) & 0x03; 1622 int acm = (pos[0] >> 4) & 0x01; 1623 bool uapsd = false; 1624 int queue; 1625 1626 switch (aci) { 1627 case 1: /* AC_BK */ 1628 queue = 3; 1629 if (acm) 1630 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1631 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1632 uapsd = true; 1633 break; 1634 case 2: /* AC_VI */ 1635 queue = 1; 1636 if (acm) 1637 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1638 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1639 uapsd = true; 1640 break; 1641 case 3: /* AC_VO */ 1642 queue = 0; 1643 if (acm) 1644 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1645 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1646 uapsd = true; 1647 break; 1648 case 0: /* AC_BE */ 1649 default: 1650 queue = 2; 1651 if (acm) 1652 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1653 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1654 uapsd = true; 1655 break; 1656 } 1657 1658 params.aifs = pos[0] & 0x0f; 1659 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1660 params.cw_min = ecw2cw(pos[1] & 0x0f); 1661 params.txop = get_unaligned_le16(pos + 2); 1662 params.acm = acm; 1663 params.uapsd = uapsd; 1664 1665 mlme_dbg(sdata, 1666 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n", 1667 queue, aci, acm, 1668 params.aifs, params.cw_min, params.cw_max, 1669 params.txop, params.uapsd); 1670 sdata->tx_conf[queue] = params; 1671 if (drv_conf_tx(local, sdata, queue, ¶ms)) 1672 sdata_err(sdata, 1673 "failed to set TX queue parameters for queue %d\n", 1674 queue); 1675 } 1676 1677 /* enable WMM or activate new settings */ 1678 sdata->vif.bss_conf.qos = true; 1679 return true; 1680 } 1681 1682 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1683 { 1684 lockdep_assert_held(&sdata->local->mtx); 1685 1686 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1687 ieee80211_run_deferred_scan(sdata->local); 1688 } 1689 1690 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1691 { 1692 mutex_lock(&sdata->local->mtx); 1693 __ieee80211_stop_poll(sdata); 1694 mutex_unlock(&sdata->local->mtx); 1695 } 1696 1697 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1698 u16 capab, bool erp_valid, u8 erp) 1699 { 1700 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1701 u32 changed = 0; 1702 bool use_protection; 1703 bool use_short_preamble; 1704 bool use_short_slot; 1705 1706 if (erp_valid) { 1707 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1708 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1709 } else { 1710 use_protection = false; 1711 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1712 } 1713 1714 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1715 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) 1716 use_short_slot = true; 1717 1718 if (use_protection != bss_conf->use_cts_prot) { 1719 bss_conf->use_cts_prot = use_protection; 1720 changed |= BSS_CHANGED_ERP_CTS_PROT; 1721 } 1722 1723 if (use_short_preamble != bss_conf->use_short_preamble) { 1724 bss_conf->use_short_preamble = use_short_preamble; 1725 changed |= BSS_CHANGED_ERP_PREAMBLE; 1726 } 1727 1728 if (use_short_slot != bss_conf->use_short_slot) { 1729 bss_conf->use_short_slot = use_short_slot; 1730 changed |= BSS_CHANGED_ERP_SLOT; 1731 } 1732 1733 return changed; 1734 } 1735 1736 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1737 struct cfg80211_bss *cbss, 1738 u32 bss_info_changed) 1739 { 1740 struct ieee80211_bss *bss = (void *)cbss->priv; 1741 struct ieee80211_local *local = sdata->local; 1742 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1743 1744 bss_info_changed |= BSS_CHANGED_ASSOC; 1745 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1746 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1747 1748 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1749 beacon_loss_count * bss_conf->beacon_int)); 1750 1751 sdata->u.mgd.associated = cbss; 1752 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1753 1754 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1755 1756 if (sdata->vif.p2p) { 1757 const struct cfg80211_bss_ies *ies; 1758 1759 rcu_read_lock(); 1760 ies = rcu_dereference(cbss->ies); 1761 if (ies) { 1762 int ret; 1763 1764 ret = cfg80211_get_p2p_attr( 1765 ies->data, ies->len, 1766 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1767 (u8 *) &bss_conf->p2p_noa_attr, 1768 sizeof(bss_conf->p2p_noa_attr)); 1769 if (ret >= 2) { 1770 sdata->u.mgd.p2p_noa_index = 1771 bss_conf->p2p_noa_attr.index; 1772 bss_info_changed |= BSS_CHANGED_P2P_PS; 1773 } 1774 } 1775 rcu_read_unlock(); 1776 } 1777 1778 /* just to be sure */ 1779 ieee80211_stop_poll(sdata); 1780 1781 ieee80211_led_assoc(local, 1); 1782 1783 if (sdata->u.mgd.have_beacon) { 1784 /* 1785 * If the AP is buggy we may get here with no DTIM period 1786 * known, so assume it's 1 which is the only safe assumption 1787 * in that case, although if the TIM IE is broken powersave 1788 * probably just won't work at all. 1789 */ 1790 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1791 bss_conf->beacon_rate = bss->beacon_rate; 1792 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1793 } else { 1794 bss_conf->beacon_rate = NULL; 1795 bss_conf->dtim_period = 0; 1796 } 1797 1798 bss_conf->assoc = 1; 1799 1800 /* Tell the driver to monitor connection quality (if supported) */ 1801 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1802 bss_conf->cqm_rssi_thold) 1803 bss_info_changed |= BSS_CHANGED_CQM; 1804 1805 /* Enable ARP filtering */ 1806 if (bss_conf->arp_addr_cnt) 1807 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1808 1809 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1810 1811 mutex_lock(&local->iflist_mtx); 1812 ieee80211_recalc_ps(local, -1); 1813 mutex_unlock(&local->iflist_mtx); 1814 1815 ieee80211_recalc_smps(sdata); 1816 ieee80211_recalc_ps_vif(sdata); 1817 1818 netif_carrier_on(sdata->dev); 1819 } 1820 1821 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1822 u16 stype, u16 reason, bool tx, 1823 u8 *frame_buf) 1824 { 1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1826 struct ieee80211_local *local = sdata->local; 1827 u32 changed = 0; 1828 1829 sdata_assert_lock(sdata); 1830 1831 if (WARN_ON_ONCE(tx && !frame_buf)) 1832 return; 1833 1834 if (WARN_ON(!ifmgd->associated)) 1835 return; 1836 1837 ieee80211_stop_poll(sdata); 1838 1839 ifmgd->associated = NULL; 1840 netif_carrier_off(sdata->dev); 1841 1842 /* 1843 * if we want to get out of ps before disassoc (why?) we have 1844 * to do it before sending disassoc, as otherwise the null-packet 1845 * won't be valid. 1846 */ 1847 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1848 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1849 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1850 } 1851 local->ps_sdata = NULL; 1852 1853 /* disable per-vif ps */ 1854 ieee80211_recalc_ps_vif(sdata); 1855 1856 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */ 1857 if (tx) 1858 ieee80211_flush_queues(local, sdata); 1859 1860 /* deauthenticate/disassociate now */ 1861 if (tx || frame_buf) 1862 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 1863 reason, tx, frame_buf); 1864 1865 /* flush out frame */ 1866 if (tx) 1867 ieee80211_flush_queues(local, sdata); 1868 1869 /* clear bssid only after building the needed mgmt frames */ 1870 memset(ifmgd->bssid, 0, ETH_ALEN); 1871 1872 /* remove AP and TDLS peers */ 1873 sta_info_flush(sdata); 1874 1875 /* finally reset all BSS / config parameters */ 1876 changed |= ieee80211_reset_erp_info(sdata); 1877 1878 ieee80211_led_assoc(local, 0); 1879 changed |= BSS_CHANGED_ASSOC; 1880 sdata->vif.bss_conf.assoc = false; 1881 1882 ifmgd->p2p_noa_index = -1; 1883 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 1884 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 1885 1886 /* on the next assoc, re-program HT/VHT parameters */ 1887 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 1888 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 1889 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 1890 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 1891 1892 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1893 1894 del_timer_sync(&local->dynamic_ps_timer); 1895 cancel_work_sync(&local->dynamic_ps_enable_work); 1896 1897 /* Disable ARP filtering */ 1898 if (sdata->vif.bss_conf.arp_addr_cnt) 1899 changed |= BSS_CHANGED_ARP_FILTER; 1900 1901 sdata->vif.bss_conf.qos = false; 1902 changed |= BSS_CHANGED_QOS; 1903 1904 /* The BSSID (not really interesting) and HT changed */ 1905 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 1906 ieee80211_bss_info_change_notify(sdata, changed); 1907 1908 /* disassociated - set to defaults now */ 1909 ieee80211_set_wmm_default(sdata, false); 1910 1911 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 1912 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 1913 del_timer_sync(&sdata->u.mgd.timer); 1914 del_timer_sync(&sdata->u.mgd.chswitch_timer); 1915 1916 sdata->vif.bss_conf.dtim_period = 0; 1917 sdata->vif.bss_conf.beacon_rate = NULL; 1918 1919 ifmgd->have_beacon = false; 1920 1921 ifmgd->flags = 0; 1922 mutex_lock(&local->mtx); 1923 ieee80211_vif_release_channel(sdata); 1924 1925 sdata->vif.csa_active = false; 1926 if (sdata->csa_block_tx) { 1927 ieee80211_wake_vif_queues(local, sdata, 1928 IEEE80211_QUEUE_STOP_REASON_CSA); 1929 sdata->csa_block_tx = false; 1930 } 1931 mutex_unlock(&local->mtx); 1932 1933 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1934 } 1935 1936 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 1937 struct ieee80211_hdr *hdr) 1938 { 1939 /* 1940 * We can postpone the mgd.timer whenever receiving unicast frames 1941 * from AP because we know that the connection is working both ways 1942 * at that time. But multicast frames (and hence also beacons) must 1943 * be ignored here, because we need to trigger the timer during 1944 * data idle periods for sending the periodic probe request to the 1945 * AP we're connected to. 1946 */ 1947 if (is_multicast_ether_addr(hdr->addr1)) 1948 return; 1949 1950 ieee80211_sta_reset_conn_monitor(sdata); 1951 } 1952 1953 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 1954 { 1955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1956 struct ieee80211_local *local = sdata->local; 1957 1958 mutex_lock(&local->mtx); 1959 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 1960 goto out; 1961 1962 __ieee80211_stop_poll(sdata); 1963 1964 mutex_lock(&local->iflist_mtx); 1965 ieee80211_recalc_ps(local, -1); 1966 mutex_unlock(&local->iflist_mtx); 1967 1968 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 1969 goto out; 1970 1971 /* 1972 * We've received a probe response, but are not sure whether 1973 * we have or will be receiving any beacons or data, so let's 1974 * schedule the timers again, just in case. 1975 */ 1976 ieee80211_sta_reset_beacon_monitor(sdata); 1977 1978 mod_timer(&ifmgd->conn_mon_timer, 1979 round_jiffies_up(jiffies + 1980 IEEE80211_CONNECTION_IDLE_TIME)); 1981 out: 1982 mutex_unlock(&local->mtx); 1983 } 1984 1985 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 1986 struct ieee80211_hdr *hdr, bool ack) 1987 { 1988 if (!ieee80211_is_data(hdr->frame_control)) 1989 return; 1990 1991 if (ieee80211_is_nullfunc(hdr->frame_control) && 1992 sdata->u.mgd.probe_send_count > 0) { 1993 if (ack) 1994 ieee80211_sta_reset_conn_monitor(sdata); 1995 else 1996 sdata->u.mgd.nullfunc_failed = true; 1997 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 1998 return; 1999 } 2000 2001 if (ack) 2002 ieee80211_sta_reset_conn_monitor(sdata); 2003 } 2004 2005 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2006 { 2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2008 const u8 *ssid; 2009 u8 *dst = ifmgd->associated->bssid; 2010 u8 unicast_limit = max(1, max_probe_tries - 3); 2011 2012 /* 2013 * Try sending broadcast probe requests for the last three 2014 * probe requests after the first ones failed since some 2015 * buggy APs only support broadcast probe requests. 2016 */ 2017 if (ifmgd->probe_send_count >= unicast_limit) 2018 dst = NULL; 2019 2020 /* 2021 * When the hardware reports an accurate Tx ACK status, it's 2022 * better to send a nullfunc frame instead of a probe request, 2023 * as it will kick us off the AP quickly if we aren't associated 2024 * anymore. The timeout will be reset if the frame is ACKed by 2025 * the AP. 2026 */ 2027 ifmgd->probe_send_count++; 2028 2029 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 2030 ifmgd->nullfunc_failed = false; 2031 ieee80211_send_nullfunc(sdata->local, sdata, 0); 2032 } else { 2033 int ssid_len; 2034 2035 rcu_read_lock(); 2036 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2037 if (WARN_ON_ONCE(ssid == NULL)) 2038 ssid_len = 0; 2039 else 2040 ssid_len = ssid[1]; 2041 2042 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL, 2043 0, (u32) -1, true, 0, 2044 ifmgd->associated->channel, false); 2045 rcu_read_unlock(); 2046 } 2047 2048 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2049 run_again(sdata, ifmgd->probe_timeout); 2050 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 2051 ieee80211_flush_queues(sdata->local, sdata); 2052 } 2053 2054 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2055 bool beacon) 2056 { 2057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2058 bool already = false; 2059 2060 if (!ieee80211_sdata_running(sdata)) 2061 return; 2062 2063 sdata_lock(sdata); 2064 2065 if (!ifmgd->associated) 2066 goto out; 2067 2068 mutex_lock(&sdata->local->mtx); 2069 2070 if (sdata->local->tmp_channel || sdata->local->scanning) { 2071 mutex_unlock(&sdata->local->mtx); 2072 goto out; 2073 } 2074 2075 if (beacon) { 2076 mlme_dbg_ratelimited(sdata, 2077 "detected beacon loss from AP (missed %d beacons) - probing\n", 2078 beacon_loss_count); 2079 2080 ieee80211_cqm_rssi_notify(&sdata->vif, 2081 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, 2082 GFP_KERNEL); 2083 } 2084 2085 /* 2086 * The driver/our work has already reported this event or the 2087 * connection monitoring has kicked in and we have already sent 2088 * a probe request. Or maybe the AP died and the driver keeps 2089 * reporting until we disassociate... 2090 * 2091 * In either case we have to ignore the current call to this 2092 * function (except for setting the correct probe reason bit) 2093 * because otherwise we would reset the timer every time and 2094 * never check whether we received a probe response! 2095 */ 2096 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2097 already = true; 2098 2099 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2100 2101 mutex_unlock(&sdata->local->mtx); 2102 2103 if (already) 2104 goto out; 2105 2106 mutex_lock(&sdata->local->iflist_mtx); 2107 ieee80211_recalc_ps(sdata->local, -1); 2108 mutex_unlock(&sdata->local->iflist_mtx); 2109 2110 ifmgd->probe_send_count = 0; 2111 ieee80211_mgd_probe_ap_send(sdata); 2112 out: 2113 sdata_unlock(sdata); 2114 } 2115 2116 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2117 struct ieee80211_vif *vif) 2118 { 2119 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2121 struct cfg80211_bss *cbss; 2122 struct sk_buff *skb; 2123 const u8 *ssid; 2124 int ssid_len; 2125 2126 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2127 return NULL; 2128 2129 sdata_assert_lock(sdata); 2130 2131 if (ifmgd->associated) 2132 cbss = ifmgd->associated; 2133 else if (ifmgd->auth_data) 2134 cbss = ifmgd->auth_data->bss; 2135 else if (ifmgd->assoc_data) 2136 cbss = ifmgd->assoc_data->bss; 2137 else 2138 return NULL; 2139 2140 rcu_read_lock(); 2141 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2142 if (WARN_ON_ONCE(ssid == NULL)) 2143 ssid_len = 0; 2144 else 2145 ssid_len = ssid[1]; 2146 2147 skb = ieee80211_build_probe_req(sdata, cbss->bssid, 2148 (u32) -1, cbss->channel, 2149 ssid + 2, ssid_len, 2150 NULL, 0, true); 2151 rcu_read_unlock(); 2152 2153 return skb; 2154 } 2155 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2156 2157 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2158 { 2159 struct ieee80211_local *local = sdata->local; 2160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2161 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2162 2163 sdata_lock(sdata); 2164 if (!ifmgd->associated) { 2165 sdata_unlock(sdata); 2166 return; 2167 } 2168 2169 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2170 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2171 true, frame_buf); 2172 mutex_lock(&local->mtx); 2173 sdata->vif.csa_active = false; 2174 if (sdata->csa_block_tx) { 2175 ieee80211_wake_vif_queues(local, sdata, 2176 IEEE80211_QUEUE_STOP_REASON_CSA); 2177 sdata->csa_block_tx = false; 2178 } 2179 mutex_unlock(&local->mtx); 2180 2181 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 2182 IEEE80211_DEAUTH_FRAME_LEN); 2183 sdata_unlock(sdata); 2184 } 2185 2186 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2187 { 2188 struct ieee80211_sub_if_data *sdata = 2189 container_of(work, struct ieee80211_sub_if_data, 2190 u.mgd.beacon_connection_loss_work); 2191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2192 struct sta_info *sta; 2193 2194 if (ifmgd->associated) { 2195 rcu_read_lock(); 2196 sta = sta_info_get(sdata, ifmgd->bssid); 2197 if (sta) 2198 sta->beacon_loss_count++; 2199 rcu_read_unlock(); 2200 } 2201 2202 if (ifmgd->connection_loss) { 2203 sdata_info(sdata, "Connection to AP %pM lost\n", 2204 ifmgd->bssid); 2205 __ieee80211_disconnect(sdata); 2206 } else { 2207 ieee80211_mgd_probe_ap(sdata, true); 2208 } 2209 } 2210 2211 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2212 { 2213 struct ieee80211_sub_if_data *sdata = 2214 container_of(work, struct ieee80211_sub_if_data, 2215 u.mgd.csa_connection_drop_work); 2216 2217 __ieee80211_disconnect(sdata); 2218 } 2219 2220 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2221 { 2222 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2223 struct ieee80211_hw *hw = &sdata->local->hw; 2224 2225 trace_api_beacon_loss(sdata); 2226 2227 sdata->u.mgd.connection_loss = false; 2228 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2229 } 2230 EXPORT_SYMBOL(ieee80211_beacon_loss); 2231 2232 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2233 { 2234 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2235 struct ieee80211_hw *hw = &sdata->local->hw; 2236 2237 trace_api_connection_loss(sdata); 2238 2239 sdata->u.mgd.connection_loss = true; 2240 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2241 } 2242 EXPORT_SYMBOL(ieee80211_connection_loss); 2243 2244 2245 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2246 bool assoc) 2247 { 2248 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2249 2250 sdata_assert_lock(sdata); 2251 2252 if (!assoc) { 2253 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2254 2255 memset(sdata->u.mgd.bssid, 0, ETH_ALEN); 2256 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2257 sdata->u.mgd.flags = 0; 2258 mutex_lock(&sdata->local->mtx); 2259 ieee80211_vif_release_channel(sdata); 2260 mutex_unlock(&sdata->local->mtx); 2261 } 2262 2263 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2264 kfree(auth_data); 2265 sdata->u.mgd.auth_data = NULL; 2266 } 2267 2268 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2269 struct ieee80211_mgmt *mgmt, size_t len) 2270 { 2271 struct ieee80211_local *local = sdata->local; 2272 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2273 u8 *pos; 2274 struct ieee802_11_elems elems; 2275 u32 tx_flags = 0; 2276 2277 pos = mgmt->u.auth.variable; 2278 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2279 if (!elems.challenge) 2280 return; 2281 auth_data->expected_transaction = 4; 2282 drv_mgd_prepare_tx(sdata->local, sdata); 2283 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 2284 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2285 IEEE80211_TX_INTFL_MLME_CONN_TX; 2286 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2287 elems.challenge - 2, elems.challenge_len + 2, 2288 auth_data->bss->bssid, auth_data->bss->bssid, 2289 auth_data->key, auth_data->key_len, 2290 auth_data->key_idx, tx_flags); 2291 } 2292 2293 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2294 struct ieee80211_mgmt *mgmt, size_t len) 2295 { 2296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2297 u8 bssid[ETH_ALEN]; 2298 u16 auth_alg, auth_transaction, status_code; 2299 struct sta_info *sta; 2300 2301 sdata_assert_lock(sdata); 2302 2303 if (len < 24 + 6) 2304 return; 2305 2306 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2307 return; 2308 2309 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2310 2311 if (!ether_addr_equal(bssid, mgmt->bssid)) 2312 return; 2313 2314 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2315 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2316 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2317 2318 if (auth_alg != ifmgd->auth_data->algorithm || 2319 auth_transaction != ifmgd->auth_data->expected_transaction) { 2320 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2321 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2322 auth_transaction, 2323 ifmgd->auth_data->expected_transaction); 2324 return; 2325 } 2326 2327 if (status_code != WLAN_STATUS_SUCCESS) { 2328 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2329 mgmt->sa, status_code); 2330 ieee80211_destroy_auth_data(sdata, false); 2331 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2332 return; 2333 } 2334 2335 switch (ifmgd->auth_data->algorithm) { 2336 case WLAN_AUTH_OPEN: 2337 case WLAN_AUTH_LEAP: 2338 case WLAN_AUTH_FT: 2339 case WLAN_AUTH_SAE: 2340 break; 2341 case WLAN_AUTH_SHARED_KEY: 2342 if (ifmgd->auth_data->expected_transaction != 4) { 2343 ieee80211_auth_challenge(sdata, mgmt, len); 2344 /* need another frame */ 2345 return; 2346 } 2347 break; 2348 default: 2349 WARN_ONCE(1, "invalid auth alg %d", 2350 ifmgd->auth_data->algorithm); 2351 return; 2352 } 2353 2354 sdata_info(sdata, "authenticated\n"); 2355 ifmgd->auth_data->done = true; 2356 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2357 ifmgd->auth_data->timeout_started = true; 2358 run_again(sdata, ifmgd->auth_data->timeout); 2359 2360 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2361 ifmgd->auth_data->expected_transaction != 2) { 2362 /* 2363 * Report auth frame to user space for processing since another 2364 * round of Authentication frames is still needed. 2365 */ 2366 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2367 return; 2368 } 2369 2370 /* move station state to auth */ 2371 mutex_lock(&sdata->local->sta_mtx); 2372 sta = sta_info_get(sdata, bssid); 2373 if (!sta) { 2374 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2375 goto out_err; 2376 } 2377 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2378 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2379 goto out_err; 2380 } 2381 mutex_unlock(&sdata->local->sta_mtx); 2382 2383 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2384 return; 2385 out_err: 2386 mutex_unlock(&sdata->local->sta_mtx); 2387 /* ignore frame -- wait for timeout */ 2388 } 2389 2390 #define case_WLAN(type) \ 2391 case WLAN_REASON_##type: return #type 2392 2393 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2394 { 2395 switch (reason_code) { 2396 case_WLAN(UNSPECIFIED); 2397 case_WLAN(PREV_AUTH_NOT_VALID); 2398 case_WLAN(DEAUTH_LEAVING); 2399 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2400 case_WLAN(DISASSOC_AP_BUSY); 2401 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2402 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2403 case_WLAN(DISASSOC_STA_HAS_LEFT); 2404 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2405 case_WLAN(DISASSOC_BAD_POWER); 2406 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2407 case_WLAN(INVALID_IE); 2408 case_WLAN(MIC_FAILURE); 2409 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2410 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2411 case_WLAN(IE_DIFFERENT); 2412 case_WLAN(INVALID_GROUP_CIPHER); 2413 case_WLAN(INVALID_PAIRWISE_CIPHER); 2414 case_WLAN(INVALID_AKMP); 2415 case_WLAN(UNSUPP_RSN_VERSION); 2416 case_WLAN(INVALID_RSN_IE_CAP); 2417 case_WLAN(IEEE8021X_FAILED); 2418 case_WLAN(CIPHER_SUITE_REJECTED); 2419 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2420 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2421 case_WLAN(DISASSOC_LOW_ACK); 2422 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2423 case_WLAN(QSTA_LEAVE_QBSS); 2424 case_WLAN(QSTA_NOT_USE); 2425 case_WLAN(QSTA_REQUIRE_SETUP); 2426 case_WLAN(QSTA_TIMEOUT); 2427 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2428 case_WLAN(MESH_PEER_CANCELED); 2429 case_WLAN(MESH_MAX_PEERS); 2430 case_WLAN(MESH_CONFIG); 2431 case_WLAN(MESH_CLOSE); 2432 case_WLAN(MESH_MAX_RETRIES); 2433 case_WLAN(MESH_CONFIRM_TIMEOUT); 2434 case_WLAN(MESH_INVALID_GTK); 2435 case_WLAN(MESH_INCONSISTENT_PARAM); 2436 case_WLAN(MESH_INVALID_SECURITY); 2437 case_WLAN(MESH_PATH_ERROR); 2438 case_WLAN(MESH_PATH_NOFORWARD); 2439 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2440 case_WLAN(MAC_EXISTS_IN_MBSS); 2441 case_WLAN(MESH_CHAN_REGULATORY); 2442 case_WLAN(MESH_CHAN); 2443 default: return "<unknown>"; 2444 } 2445 } 2446 2447 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2448 struct ieee80211_mgmt *mgmt, size_t len) 2449 { 2450 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2451 const u8 *bssid = NULL; 2452 u16 reason_code; 2453 2454 sdata_assert_lock(sdata); 2455 2456 if (len < 24 + 2) 2457 return; 2458 2459 if (!ifmgd->associated || 2460 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2461 return; 2462 2463 bssid = ifmgd->associated->bssid; 2464 2465 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2466 2467 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2468 bssid, reason_code, ieee80211_get_reason_code_string(reason_code)); 2469 2470 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2471 2472 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2473 } 2474 2475 2476 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2477 struct ieee80211_mgmt *mgmt, size_t len) 2478 { 2479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2480 u16 reason_code; 2481 2482 sdata_assert_lock(sdata); 2483 2484 if (len < 24 + 2) 2485 return; 2486 2487 if (!ifmgd->associated || 2488 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2489 return; 2490 2491 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2492 2493 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", 2494 mgmt->sa, reason_code); 2495 2496 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2497 2498 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2499 } 2500 2501 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2502 u8 *supp_rates, unsigned int supp_rates_len, 2503 u32 *rates, u32 *basic_rates, 2504 bool *have_higher_than_11mbit, 2505 int *min_rate, int *min_rate_index, 2506 int shift, u32 rate_flags) 2507 { 2508 int i, j; 2509 2510 for (i = 0; i < supp_rates_len; i++) { 2511 int rate = supp_rates[i] & 0x7f; 2512 bool is_basic = !!(supp_rates[i] & 0x80); 2513 2514 if ((rate * 5 * (1 << shift)) > 110) 2515 *have_higher_than_11mbit = true; 2516 2517 /* 2518 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 2519 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. 2520 * 2521 * Note: Even through the membership selector and the basic 2522 * rate flag share the same bit, they are not exactly 2523 * the same. 2524 */ 2525 if (!!(supp_rates[i] & 0x80) && 2526 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2527 continue; 2528 2529 for (j = 0; j < sband->n_bitrates; j++) { 2530 struct ieee80211_rate *br; 2531 int brate; 2532 2533 br = &sband->bitrates[j]; 2534 if ((rate_flags & br->flags) != rate_flags) 2535 continue; 2536 2537 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2538 if (brate == rate) { 2539 *rates |= BIT(j); 2540 if (is_basic) 2541 *basic_rates |= BIT(j); 2542 if ((rate * 5) < *min_rate) { 2543 *min_rate = rate * 5; 2544 *min_rate_index = j; 2545 } 2546 break; 2547 } 2548 } 2549 } 2550 } 2551 2552 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2553 bool assoc) 2554 { 2555 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2556 2557 sdata_assert_lock(sdata); 2558 2559 if (!assoc) { 2560 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2561 2562 memset(sdata->u.mgd.bssid, 0, ETH_ALEN); 2563 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2564 sdata->u.mgd.flags = 0; 2565 mutex_lock(&sdata->local->mtx); 2566 ieee80211_vif_release_channel(sdata); 2567 mutex_unlock(&sdata->local->mtx); 2568 } 2569 2570 kfree(assoc_data); 2571 sdata->u.mgd.assoc_data = NULL; 2572 } 2573 2574 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2575 struct cfg80211_bss *cbss, 2576 struct ieee80211_mgmt *mgmt, size_t len) 2577 { 2578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2579 struct ieee80211_local *local = sdata->local; 2580 struct ieee80211_supported_band *sband; 2581 struct sta_info *sta; 2582 u8 *pos; 2583 u16 capab_info, aid; 2584 struct ieee802_11_elems elems; 2585 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2586 const struct cfg80211_bss_ies *bss_ies = NULL; 2587 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2588 u32 changed = 0; 2589 int err; 2590 bool ret; 2591 2592 /* AssocResp and ReassocResp have identical structure */ 2593 2594 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2595 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2596 2597 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2598 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2599 aid); 2600 aid &= ~(BIT(15) | BIT(14)); 2601 2602 ifmgd->broken_ap = false; 2603 2604 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2605 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2606 aid); 2607 aid = 0; 2608 ifmgd->broken_ap = true; 2609 } 2610 2611 pos = mgmt->u.assoc_resp.variable; 2612 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2613 2614 if (!elems.supp_rates) { 2615 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2616 return false; 2617 } 2618 2619 ifmgd->aid = aid; 2620 2621 /* 2622 * Some APs are erroneously not including some information in their 2623 * (re)association response frames. Try to recover by using the data 2624 * from the beacon or probe response. This seems to afflict mobile 2625 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2626 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2627 */ 2628 if ((assoc_data->wmm && !elems.wmm_param) || 2629 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2630 (!elems.ht_cap_elem || !elems.ht_operation)) || 2631 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2632 (!elems.vht_cap_elem || !elems.vht_operation))) { 2633 const struct cfg80211_bss_ies *ies; 2634 struct ieee802_11_elems bss_elems; 2635 2636 rcu_read_lock(); 2637 ies = rcu_dereference(cbss->ies); 2638 if (ies) 2639 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2640 GFP_ATOMIC); 2641 rcu_read_unlock(); 2642 if (!bss_ies) 2643 return false; 2644 2645 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2646 false, &bss_elems); 2647 if (assoc_data->wmm && 2648 !elems.wmm_param && bss_elems.wmm_param) { 2649 elems.wmm_param = bss_elems.wmm_param; 2650 sdata_info(sdata, 2651 "AP bug: WMM param missing from AssocResp\n"); 2652 } 2653 2654 /* 2655 * Also check if we requested HT/VHT, otherwise the AP doesn't 2656 * have to include the IEs in the (re)association response. 2657 */ 2658 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2659 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2660 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2661 sdata_info(sdata, 2662 "AP bug: HT capability missing from AssocResp\n"); 2663 } 2664 if (!elems.ht_operation && bss_elems.ht_operation && 2665 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2666 elems.ht_operation = bss_elems.ht_operation; 2667 sdata_info(sdata, 2668 "AP bug: HT operation missing from AssocResp\n"); 2669 } 2670 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2671 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2672 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2673 sdata_info(sdata, 2674 "AP bug: VHT capa missing from AssocResp\n"); 2675 } 2676 if (!elems.vht_operation && bss_elems.vht_operation && 2677 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2678 elems.vht_operation = bss_elems.vht_operation; 2679 sdata_info(sdata, 2680 "AP bug: VHT operation missing from AssocResp\n"); 2681 } 2682 } 2683 2684 /* 2685 * We previously checked these in the beacon/probe response, so 2686 * they should be present here. This is just a safety net. 2687 */ 2688 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2689 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2690 sdata_info(sdata, 2691 "HT AP is missing WMM params or HT capability/operation\n"); 2692 ret = false; 2693 goto out; 2694 } 2695 2696 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2697 (!elems.vht_cap_elem || !elems.vht_operation)) { 2698 sdata_info(sdata, 2699 "VHT AP is missing VHT capability/operation\n"); 2700 ret = false; 2701 goto out; 2702 } 2703 2704 mutex_lock(&sdata->local->sta_mtx); 2705 /* 2706 * station info was already allocated and inserted before 2707 * the association and should be available to us 2708 */ 2709 sta = sta_info_get(sdata, cbss->bssid); 2710 if (WARN_ON(!sta)) { 2711 mutex_unlock(&sdata->local->sta_mtx); 2712 ret = false; 2713 goto out; 2714 } 2715 2716 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; 2717 2718 /* Set up internal HT/VHT capabilities */ 2719 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 2720 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 2721 elems.ht_cap_elem, sta); 2722 2723 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 2724 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 2725 elems.vht_cap_elem, sta); 2726 2727 /* 2728 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 2729 * in their association response, so ignore that data for our own 2730 * configuration. If it changed since the last beacon, we'll get the 2731 * next beacon and update then. 2732 */ 2733 2734 /* 2735 * If an operating mode notification IE is present, override the 2736 * NSS calculation (that would be done in rate_control_rate_init()) 2737 * and use the # of streams from that element. 2738 */ 2739 if (elems.opmode_notif && 2740 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 2741 u8 nss; 2742 2743 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 2744 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 2745 nss += 1; 2746 sta->sta.rx_nss = nss; 2747 } 2748 2749 rate_control_rate_init(sta); 2750 2751 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) 2752 set_sta_flag(sta, WLAN_STA_MFP); 2753 2754 sta->sta.wme = elems.wmm_param; 2755 2756 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 2757 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 2758 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 2759 if (err) { 2760 sdata_info(sdata, 2761 "failed to move station %pM to desired state\n", 2762 sta->sta.addr); 2763 WARN_ON(__sta_info_destroy(sta)); 2764 mutex_unlock(&sdata->local->sta_mtx); 2765 ret = false; 2766 goto out; 2767 } 2768 2769 mutex_unlock(&sdata->local->sta_mtx); 2770 2771 /* 2772 * Always handle WMM once after association regardless 2773 * of the first value the AP uses. Setting -1 here has 2774 * that effect because the AP values is an unsigned 2775 * 4-bit value. 2776 */ 2777 ifmgd->wmm_last_param_set = -1; 2778 2779 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param) 2780 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 2781 elems.wmm_param_len); 2782 else 2783 ieee80211_set_wmm_default(sdata, false); 2784 changed |= BSS_CHANGED_QOS; 2785 2786 /* set AID and assoc capability, 2787 * ieee80211_set_associated() will tell the driver */ 2788 bss_conf->aid = aid; 2789 bss_conf->assoc_capability = capab_info; 2790 ieee80211_set_associated(sdata, cbss, changed); 2791 2792 /* 2793 * If we're using 4-addr mode, let the AP know that we're 2794 * doing so, so that it can create the STA VLAN on its side 2795 */ 2796 if (ifmgd->use_4addr) 2797 ieee80211_send_4addr_nullfunc(local, sdata); 2798 2799 /* 2800 * Start timer to probe the connection to the AP now. 2801 * Also start the timer that will detect beacon loss. 2802 */ 2803 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 2804 ieee80211_sta_reset_beacon_monitor(sdata); 2805 2806 ret = true; 2807 out: 2808 kfree(bss_ies); 2809 return ret; 2810 } 2811 2812 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 2813 struct ieee80211_mgmt *mgmt, 2814 size_t len) 2815 { 2816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2817 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2818 u16 capab_info, status_code, aid; 2819 struct ieee802_11_elems elems; 2820 int ac, uapsd_queues = -1; 2821 u8 *pos; 2822 bool reassoc; 2823 struct cfg80211_bss *bss; 2824 2825 sdata_assert_lock(sdata); 2826 2827 if (!assoc_data) 2828 return; 2829 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 2830 return; 2831 2832 /* 2833 * AssocResp and ReassocResp have identical structure, so process both 2834 * of them in this function. 2835 */ 2836 2837 if (len < 24 + 6) 2838 return; 2839 2840 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 2841 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2842 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 2843 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2844 2845 sdata_info(sdata, 2846 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 2847 reassoc ? "Rea" : "A", mgmt->sa, 2848 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 2849 2850 pos = mgmt->u.assoc_resp.variable; 2851 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2852 2853 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 2854 elems.timeout_int && 2855 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 2856 u32 tu, ms; 2857 tu = le32_to_cpu(elems.timeout_int->value); 2858 ms = tu * 1024 / 1000; 2859 sdata_info(sdata, 2860 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 2861 mgmt->sa, tu, ms); 2862 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 2863 assoc_data->timeout_started = true; 2864 if (ms > IEEE80211_ASSOC_TIMEOUT) 2865 run_again(sdata, assoc_data->timeout); 2866 return; 2867 } 2868 2869 bss = assoc_data->bss; 2870 2871 if (status_code != WLAN_STATUS_SUCCESS) { 2872 sdata_info(sdata, "%pM denied association (code=%d)\n", 2873 mgmt->sa, status_code); 2874 ieee80211_destroy_assoc_data(sdata, false); 2875 } else { 2876 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 2877 /* oops -- internal error -- send timeout for now */ 2878 ieee80211_destroy_assoc_data(sdata, false); 2879 cfg80211_assoc_timeout(sdata->dev, bss); 2880 return; 2881 } 2882 sdata_info(sdata, "associated\n"); 2883 2884 /* 2885 * destroy assoc_data afterwards, as otherwise an idle 2886 * recalc after assoc_data is NULL but before associated 2887 * is set can cause the interface to go idle 2888 */ 2889 ieee80211_destroy_assoc_data(sdata, true); 2890 2891 /* get uapsd queues configuration */ 2892 uapsd_queues = 0; 2893 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2894 if (sdata->tx_conf[ac].uapsd) 2895 uapsd_queues |= BIT(ac); 2896 } 2897 2898 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 2899 } 2900 2901 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 2902 struct ieee80211_mgmt *mgmt, size_t len, 2903 struct ieee80211_rx_status *rx_status, 2904 struct ieee802_11_elems *elems) 2905 { 2906 struct ieee80211_local *local = sdata->local; 2907 struct ieee80211_bss *bss; 2908 struct ieee80211_channel *channel; 2909 2910 sdata_assert_lock(sdata); 2911 2912 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 2913 if (!channel) 2914 return; 2915 2916 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 2917 channel); 2918 if (bss) { 2919 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 2920 ieee80211_rx_bss_put(local, bss); 2921 } 2922 } 2923 2924 2925 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 2926 struct sk_buff *skb) 2927 { 2928 struct ieee80211_mgmt *mgmt = (void *)skb->data; 2929 struct ieee80211_if_managed *ifmgd; 2930 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 2931 size_t baselen, len = skb->len; 2932 struct ieee802_11_elems elems; 2933 2934 ifmgd = &sdata->u.mgd; 2935 2936 sdata_assert_lock(sdata); 2937 2938 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 2939 return; /* ignore ProbeResp to foreign address */ 2940 2941 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 2942 if (baselen > len) 2943 return; 2944 2945 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 2946 false, &elems); 2947 2948 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 2949 2950 if (ifmgd->associated && 2951 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2952 ieee80211_reset_ap_probe(sdata); 2953 2954 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && 2955 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { 2956 /* got probe response, continue with auth */ 2957 sdata_info(sdata, "direct probe responded\n"); 2958 ifmgd->auth_data->tries = 0; 2959 ifmgd->auth_data->timeout = jiffies; 2960 ifmgd->auth_data->timeout_started = true; 2961 run_again(sdata, ifmgd->auth_data->timeout); 2962 } 2963 } 2964 2965 /* 2966 * This is the canonical list of information elements we care about, 2967 * the filter code also gives us all changes to the Microsoft OUI 2968 * (00:50:F2) vendor IE which is used for WMM which we need to track, 2969 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 2970 * changes to requested client power. 2971 * 2972 * We implement beacon filtering in software since that means we can 2973 * avoid processing the frame here and in cfg80211, and userspace 2974 * will not be able to tell whether the hardware supports it or not. 2975 * 2976 * XXX: This list needs to be dynamic -- userspace needs to be able to 2977 * add items it requires. It also needs to be able to tell us to 2978 * look out for other vendor IEs. 2979 */ 2980 static const u64 care_about_ies = 2981 (1ULL << WLAN_EID_COUNTRY) | 2982 (1ULL << WLAN_EID_ERP_INFO) | 2983 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 2984 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 2985 (1ULL << WLAN_EID_HT_CAPABILITY) | 2986 (1ULL << WLAN_EID_HT_OPERATION); 2987 2988 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 2989 struct ieee80211_mgmt *mgmt, size_t len, 2990 struct ieee80211_rx_status *rx_status) 2991 { 2992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2993 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2994 size_t baselen; 2995 struct ieee802_11_elems elems; 2996 struct ieee80211_local *local = sdata->local; 2997 struct ieee80211_chanctx_conf *chanctx_conf; 2998 struct ieee80211_channel *chan; 2999 struct sta_info *sta; 3000 u32 changed = 0; 3001 bool erp_valid; 3002 u8 erp_value = 0; 3003 u32 ncrc; 3004 u8 *bssid; 3005 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3006 3007 sdata_assert_lock(sdata); 3008 3009 /* Process beacon from the current BSS */ 3010 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3011 if (baselen > len) 3012 return; 3013 3014 rcu_read_lock(); 3015 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3016 if (!chanctx_conf) { 3017 rcu_read_unlock(); 3018 return; 3019 } 3020 3021 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3022 rcu_read_unlock(); 3023 return; 3024 } 3025 chan = chanctx_conf->def.chan; 3026 rcu_read_unlock(); 3027 3028 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3029 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3030 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3031 len - baselen, false, &elems); 3032 3033 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3034 if (elems.tim && !elems.parse_error) { 3035 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3036 ifmgd->dtim_period = tim_ie->dtim_period; 3037 } 3038 ifmgd->have_beacon = true; 3039 ifmgd->assoc_data->need_beacon = false; 3040 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 3041 sdata->vif.bss_conf.sync_tsf = 3042 le64_to_cpu(mgmt->u.beacon.timestamp); 3043 sdata->vif.bss_conf.sync_device_ts = 3044 rx_status->device_timestamp; 3045 if (elems.tim) 3046 sdata->vif.bss_conf.sync_dtim_count = 3047 elems.tim->dtim_count; 3048 else 3049 sdata->vif.bss_conf.sync_dtim_count = 0; 3050 } 3051 /* continue assoc process */ 3052 ifmgd->assoc_data->timeout = jiffies; 3053 ifmgd->assoc_data->timeout_started = true; 3054 run_again(sdata, ifmgd->assoc_data->timeout); 3055 return; 3056 } 3057 3058 if (!ifmgd->associated || 3059 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3060 return; 3061 bssid = ifmgd->associated->bssid; 3062 3063 /* Track average RSSI from the Beacon frames of the current AP */ 3064 ifmgd->last_beacon_signal = rx_status->signal; 3065 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3066 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3067 ifmgd->ave_beacon_signal = rx_status->signal * 16; 3068 ifmgd->last_cqm_event_signal = 0; 3069 ifmgd->count_beacon_signal = 1; 3070 ifmgd->last_ave_beacon_signal = 0; 3071 } else { 3072 ifmgd->ave_beacon_signal = 3073 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + 3074 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * 3075 ifmgd->ave_beacon_signal) / 16; 3076 ifmgd->count_beacon_signal++; 3077 } 3078 3079 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3080 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3081 int sig = ifmgd->ave_beacon_signal; 3082 int last_sig = ifmgd->last_ave_beacon_signal; 3083 3084 /* 3085 * if signal crosses either of the boundaries, invoke callback 3086 * with appropriate parameters 3087 */ 3088 if (sig > ifmgd->rssi_max_thold && 3089 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3090 ifmgd->last_ave_beacon_signal = sig; 3091 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH); 3092 } else if (sig < ifmgd->rssi_min_thold && 3093 (last_sig >= ifmgd->rssi_max_thold || 3094 last_sig == 0)) { 3095 ifmgd->last_ave_beacon_signal = sig; 3096 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW); 3097 } 3098 } 3099 3100 if (bss_conf->cqm_rssi_thold && 3101 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3102 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3103 int sig = ifmgd->ave_beacon_signal / 16; 3104 int last_event = ifmgd->last_cqm_event_signal; 3105 int thold = bss_conf->cqm_rssi_thold; 3106 int hyst = bss_conf->cqm_rssi_hyst; 3107 if (sig < thold && 3108 (last_event == 0 || sig < last_event - hyst)) { 3109 ifmgd->last_cqm_event_signal = sig; 3110 ieee80211_cqm_rssi_notify( 3111 &sdata->vif, 3112 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3113 GFP_KERNEL); 3114 } else if (sig > thold && 3115 (last_event == 0 || sig > last_event + hyst)) { 3116 ifmgd->last_cqm_event_signal = sig; 3117 ieee80211_cqm_rssi_notify( 3118 &sdata->vif, 3119 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3120 GFP_KERNEL); 3121 } 3122 } 3123 3124 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3125 mlme_dbg_ratelimited(sdata, 3126 "cancelling AP probe due to a received beacon\n"); 3127 ieee80211_reset_ap_probe(sdata); 3128 } 3129 3130 /* 3131 * Push the beacon loss detection into the future since 3132 * we are processing a beacon from the AP just now. 3133 */ 3134 ieee80211_sta_reset_beacon_monitor(sdata); 3135 3136 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3137 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3138 len - baselen, false, &elems, 3139 care_about_ies, ncrc); 3140 3141 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { 3142 bool directed_tim = ieee80211_check_tim(elems.tim, 3143 elems.tim_len, 3144 ifmgd->aid); 3145 if (directed_tim) { 3146 if (local->hw.conf.dynamic_ps_timeout > 0) { 3147 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3148 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3149 ieee80211_hw_config(local, 3150 IEEE80211_CONF_CHANGE_PS); 3151 } 3152 ieee80211_send_nullfunc(local, sdata, 0); 3153 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3154 local->pspolling = true; 3155 3156 /* 3157 * Here is assumed that the driver will be 3158 * able to send ps-poll frame and receive a 3159 * response even though power save mode is 3160 * enabled, but some drivers might require 3161 * to disable power save here. This needs 3162 * to be investigated. 3163 */ 3164 ieee80211_send_pspoll(local, sdata); 3165 } 3166 } 3167 } 3168 3169 if (sdata->vif.p2p) { 3170 struct ieee80211_p2p_noa_attr noa = {}; 3171 int ret; 3172 3173 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3174 len - baselen, 3175 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3176 (u8 *) &noa, sizeof(noa)); 3177 if (ret >= 2) { 3178 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3179 /* valid noa_attr and index changed */ 3180 sdata->u.mgd.p2p_noa_index = noa.index; 3181 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3182 changed |= BSS_CHANGED_P2P_PS; 3183 /* 3184 * make sure we update all information, the CRC 3185 * mechanism doesn't look at P2P attributes. 3186 */ 3187 ifmgd->beacon_crc_valid = false; 3188 } 3189 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3190 /* noa_attr not found and we had valid noa_attr before */ 3191 sdata->u.mgd.p2p_noa_index = -1; 3192 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3193 changed |= BSS_CHANGED_P2P_PS; 3194 ifmgd->beacon_crc_valid = false; 3195 } 3196 } 3197 3198 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3199 return; 3200 ifmgd->beacon_crc = ncrc; 3201 ifmgd->beacon_crc_valid = true; 3202 3203 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3204 3205 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3206 &elems, true); 3207 3208 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3209 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3210 elems.wmm_param_len)) 3211 changed |= BSS_CHANGED_QOS; 3212 3213 /* 3214 * If we haven't had a beacon before, tell the driver about the 3215 * DTIM period (and beacon timing if desired) now. 3216 */ 3217 if (!ifmgd->have_beacon) { 3218 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3219 if (elems.tim) 3220 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3221 else 3222 bss_conf->dtim_period = 1; 3223 3224 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 3225 sdata->vif.bss_conf.sync_tsf = 3226 le64_to_cpu(mgmt->u.beacon.timestamp); 3227 sdata->vif.bss_conf.sync_device_ts = 3228 rx_status->device_timestamp; 3229 if (elems.tim) 3230 sdata->vif.bss_conf.sync_dtim_count = 3231 elems.tim->dtim_count; 3232 else 3233 sdata->vif.bss_conf.sync_dtim_count = 0; 3234 } 3235 3236 changed |= BSS_CHANGED_BEACON_INFO; 3237 ifmgd->have_beacon = true; 3238 3239 mutex_lock(&local->iflist_mtx); 3240 ieee80211_recalc_ps(local, -1); 3241 mutex_unlock(&local->iflist_mtx); 3242 3243 ieee80211_recalc_ps_vif(sdata); 3244 } 3245 3246 if (elems.erp_info) { 3247 erp_valid = true; 3248 erp_value = elems.erp_info[0]; 3249 } else { 3250 erp_valid = false; 3251 } 3252 changed |= ieee80211_handle_bss_capability(sdata, 3253 le16_to_cpu(mgmt->u.beacon.capab_info), 3254 erp_valid, erp_value); 3255 3256 mutex_lock(&local->sta_mtx); 3257 sta = sta_info_get(sdata, bssid); 3258 3259 if (ieee80211_config_bw(sdata, sta, 3260 elems.ht_cap_elem, elems.ht_operation, 3261 elems.vht_operation, bssid, &changed)) { 3262 mutex_unlock(&local->sta_mtx); 3263 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3264 WLAN_REASON_DEAUTH_LEAVING, 3265 true, deauth_buf); 3266 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf, 3267 sizeof(deauth_buf)); 3268 return; 3269 } 3270 3271 if (sta && elems.opmode_notif) 3272 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3273 rx_status->band, true); 3274 mutex_unlock(&local->sta_mtx); 3275 3276 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3277 elems.country_elem, 3278 elems.country_elem_len, 3279 elems.pwr_constr_elem, 3280 elems.cisco_dtpc_elem); 3281 3282 ieee80211_bss_info_change_notify(sdata, changed); 3283 } 3284 3285 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3286 struct sk_buff *skb) 3287 { 3288 struct ieee80211_rx_status *rx_status; 3289 struct ieee80211_mgmt *mgmt; 3290 u16 fc; 3291 struct ieee802_11_elems elems; 3292 int ies_len; 3293 3294 rx_status = (struct ieee80211_rx_status *) skb->cb; 3295 mgmt = (struct ieee80211_mgmt *) skb->data; 3296 fc = le16_to_cpu(mgmt->frame_control); 3297 3298 sdata_lock(sdata); 3299 3300 switch (fc & IEEE80211_FCTL_STYPE) { 3301 case IEEE80211_STYPE_BEACON: 3302 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3303 break; 3304 case IEEE80211_STYPE_PROBE_RESP: 3305 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3306 break; 3307 case IEEE80211_STYPE_AUTH: 3308 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3309 break; 3310 case IEEE80211_STYPE_DEAUTH: 3311 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3312 break; 3313 case IEEE80211_STYPE_DISASSOC: 3314 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3315 break; 3316 case IEEE80211_STYPE_ASSOC_RESP: 3317 case IEEE80211_STYPE_REASSOC_RESP: 3318 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3319 break; 3320 case IEEE80211_STYPE_ACTION: 3321 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3322 ies_len = skb->len - 3323 offsetof(struct ieee80211_mgmt, 3324 u.action.u.chan_switch.variable); 3325 3326 if (ies_len < 0) 3327 break; 3328 3329 ieee802_11_parse_elems( 3330 mgmt->u.action.u.chan_switch.variable, 3331 ies_len, true, &elems); 3332 3333 if (elems.parse_error) 3334 break; 3335 3336 ieee80211_sta_process_chanswitch(sdata, 3337 rx_status->mactime, 3338 &elems, false); 3339 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3340 ies_len = skb->len - 3341 offsetof(struct ieee80211_mgmt, 3342 u.action.u.ext_chan_switch.variable); 3343 3344 if (ies_len < 0) 3345 break; 3346 3347 ieee802_11_parse_elems( 3348 mgmt->u.action.u.ext_chan_switch.variable, 3349 ies_len, true, &elems); 3350 3351 if (elems.parse_error) 3352 break; 3353 3354 /* for the handling code pretend this was also an IE */ 3355 elems.ext_chansw_ie = 3356 &mgmt->u.action.u.ext_chan_switch.data; 3357 3358 ieee80211_sta_process_chanswitch(sdata, 3359 rx_status->mactime, 3360 &elems, false); 3361 } 3362 break; 3363 } 3364 sdata_unlock(sdata); 3365 } 3366 3367 static void ieee80211_sta_timer(unsigned long data) 3368 { 3369 struct ieee80211_sub_if_data *sdata = 3370 (struct ieee80211_sub_if_data *) data; 3371 3372 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3373 } 3374 3375 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3376 u8 *bssid, u8 reason, bool tx) 3377 { 3378 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3379 3380 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3381 tx, frame_buf); 3382 3383 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 3384 IEEE80211_DEAUTH_FRAME_LEN); 3385 } 3386 3387 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) 3388 { 3389 struct ieee80211_local *local = sdata->local; 3390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3391 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3392 u32 tx_flags = 0; 3393 3394 sdata_assert_lock(sdata); 3395 3396 if (WARN_ON_ONCE(!auth_data)) 3397 return -EINVAL; 3398 3399 auth_data->tries++; 3400 3401 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3402 sdata_info(sdata, "authentication with %pM timed out\n", 3403 auth_data->bss->bssid); 3404 3405 /* 3406 * Most likely AP is not in the range so remove the 3407 * bss struct for that AP. 3408 */ 3409 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3410 3411 return -ETIMEDOUT; 3412 } 3413 3414 drv_mgd_prepare_tx(local, sdata); 3415 3416 if (auth_data->bss->proberesp_ies) { 3417 u16 trans = 1; 3418 u16 status = 0; 3419 3420 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3421 auth_data->bss->bssid, auth_data->tries, 3422 IEEE80211_AUTH_MAX_TRIES); 3423 3424 auth_data->expected_transaction = 2; 3425 3426 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3427 trans = auth_data->sae_trans; 3428 status = auth_data->sae_status; 3429 auth_data->expected_transaction = trans; 3430 } 3431 3432 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 3433 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3434 IEEE80211_TX_INTFL_MLME_CONN_TX; 3435 3436 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3437 auth_data->data, auth_data->data_len, 3438 auth_data->bss->bssid, 3439 auth_data->bss->bssid, NULL, 0, 0, 3440 tx_flags); 3441 } else { 3442 const u8 *ssidie; 3443 3444 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", 3445 auth_data->bss->bssid, auth_data->tries, 3446 IEEE80211_AUTH_MAX_TRIES); 3447 3448 rcu_read_lock(); 3449 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); 3450 if (!ssidie) { 3451 rcu_read_unlock(); 3452 return -EINVAL; 3453 } 3454 /* 3455 * Direct probe is sent to broadcast address as some APs 3456 * will not answer to direct packet in unassociated state. 3457 */ 3458 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1], 3459 NULL, 0, (u32) -1, true, 0, 3460 auth_data->bss->channel, false); 3461 rcu_read_unlock(); 3462 } 3463 3464 if (tx_flags == 0) { 3465 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3466 auth_data->timeout_started = true; 3467 run_again(sdata, auth_data->timeout); 3468 } else { 3469 auth_data->timeout = 3470 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3471 auth_data->timeout_started = true; 3472 run_again(sdata, auth_data->timeout); 3473 } 3474 3475 return 0; 3476 } 3477 3478 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3479 { 3480 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3481 struct ieee80211_local *local = sdata->local; 3482 3483 sdata_assert_lock(sdata); 3484 3485 assoc_data->tries++; 3486 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3487 sdata_info(sdata, "association with %pM timed out\n", 3488 assoc_data->bss->bssid); 3489 3490 /* 3491 * Most likely AP is not in the range so remove the 3492 * bss struct for that AP. 3493 */ 3494 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3495 3496 return -ETIMEDOUT; 3497 } 3498 3499 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3500 assoc_data->bss->bssid, assoc_data->tries, 3501 IEEE80211_ASSOC_MAX_TRIES); 3502 ieee80211_send_assoc(sdata); 3503 3504 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { 3505 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3506 assoc_data->timeout_started = true; 3507 run_again(sdata, assoc_data->timeout); 3508 } else { 3509 assoc_data->timeout = 3510 round_jiffies_up(jiffies + 3511 IEEE80211_ASSOC_TIMEOUT_LONG); 3512 assoc_data->timeout_started = true; 3513 run_again(sdata, assoc_data->timeout); 3514 } 3515 3516 return 0; 3517 } 3518 3519 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3520 __le16 fc, bool acked) 3521 { 3522 struct ieee80211_local *local = sdata->local; 3523 3524 sdata->u.mgd.status_fc = fc; 3525 sdata->u.mgd.status_acked = acked; 3526 sdata->u.mgd.status_received = true; 3527 3528 ieee80211_queue_work(&local->hw, &sdata->work); 3529 } 3530 3531 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3532 { 3533 struct ieee80211_local *local = sdata->local; 3534 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3535 3536 sdata_lock(sdata); 3537 3538 if (ifmgd->status_received) { 3539 __le16 fc = ifmgd->status_fc; 3540 bool status_acked = ifmgd->status_acked; 3541 3542 ifmgd->status_received = false; 3543 if (ifmgd->auth_data && 3544 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) { 3545 if (status_acked) { 3546 ifmgd->auth_data->timeout = 3547 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3548 run_again(sdata, ifmgd->auth_data->timeout); 3549 } else { 3550 ifmgd->auth_data->timeout = jiffies - 1; 3551 } 3552 ifmgd->auth_data->timeout_started = true; 3553 } else if (ifmgd->assoc_data && 3554 (ieee80211_is_assoc_req(fc) || 3555 ieee80211_is_reassoc_req(fc))) { 3556 if (status_acked) { 3557 ifmgd->assoc_data->timeout = 3558 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3559 run_again(sdata, ifmgd->assoc_data->timeout); 3560 } else { 3561 ifmgd->assoc_data->timeout = jiffies - 1; 3562 } 3563 ifmgd->assoc_data->timeout_started = true; 3564 } 3565 } 3566 3567 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3568 time_after(jiffies, ifmgd->auth_data->timeout)) { 3569 if (ifmgd->auth_data->done) { 3570 /* 3571 * ok ... we waited for assoc but userspace didn't, 3572 * so let's just kill the auth data 3573 */ 3574 ieee80211_destroy_auth_data(sdata, false); 3575 } else if (ieee80211_probe_auth(sdata)) { 3576 u8 bssid[ETH_ALEN]; 3577 3578 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3579 3580 ieee80211_destroy_auth_data(sdata, false); 3581 3582 cfg80211_auth_timeout(sdata->dev, bssid); 3583 } 3584 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3585 run_again(sdata, ifmgd->auth_data->timeout); 3586 3587 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3588 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3589 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3590 ieee80211_do_assoc(sdata)) { 3591 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3592 3593 ieee80211_destroy_assoc_data(sdata, false); 3594 cfg80211_assoc_timeout(sdata->dev, bss); 3595 } 3596 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3597 run_again(sdata, ifmgd->assoc_data->timeout); 3598 3599 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3600 ifmgd->associated) { 3601 u8 bssid[ETH_ALEN]; 3602 int max_tries; 3603 3604 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3605 3606 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 3607 max_tries = max_nullfunc_tries; 3608 else 3609 max_tries = max_probe_tries; 3610 3611 /* ACK received for nullfunc probing frame */ 3612 if (!ifmgd->probe_send_count) 3613 ieee80211_reset_ap_probe(sdata); 3614 else if (ifmgd->nullfunc_failed) { 3615 if (ifmgd->probe_send_count < max_tries) { 3616 mlme_dbg(sdata, 3617 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3618 bssid, ifmgd->probe_send_count, 3619 max_tries); 3620 ieee80211_mgd_probe_ap_send(sdata); 3621 } else { 3622 mlme_dbg(sdata, 3623 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3624 bssid); 3625 ieee80211_sta_connection_lost(sdata, bssid, 3626 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3627 false); 3628 } 3629 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3630 run_again(sdata, ifmgd->probe_timeout); 3631 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 3632 mlme_dbg(sdata, 3633 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3634 bssid, probe_wait_ms); 3635 ieee80211_sta_connection_lost(sdata, bssid, 3636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3637 } else if (ifmgd->probe_send_count < max_tries) { 3638 mlme_dbg(sdata, 3639 "No probe response from AP %pM after %dms, try %d/%i\n", 3640 bssid, probe_wait_ms, 3641 ifmgd->probe_send_count, max_tries); 3642 ieee80211_mgd_probe_ap_send(sdata); 3643 } else { 3644 /* 3645 * We actually lost the connection ... or did we? 3646 * Let's make sure! 3647 */ 3648 wiphy_debug(local->hw.wiphy, 3649 "%s: No probe response from AP %pM" 3650 " after %dms, disconnecting.\n", 3651 sdata->name, 3652 bssid, probe_wait_ms); 3653 3654 ieee80211_sta_connection_lost(sdata, bssid, 3655 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3656 } 3657 } 3658 3659 sdata_unlock(sdata); 3660 } 3661 3662 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 3663 { 3664 struct ieee80211_sub_if_data *sdata = 3665 (struct ieee80211_sub_if_data *) data; 3666 struct ieee80211_local *local = sdata->local; 3667 3668 if (local->quiescing) 3669 return; 3670 3671 if (sdata->vif.csa_active) 3672 return; 3673 3674 sdata->u.mgd.connection_loss = false; 3675 ieee80211_queue_work(&sdata->local->hw, 3676 &sdata->u.mgd.beacon_connection_loss_work); 3677 } 3678 3679 static void ieee80211_sta_conn_mon_timer(unsigned long data) 3680 { 3681 struct ieee80211_sub_if_data *sdata = 3682 (struct ieee80211_sub_if_data *) data; 3683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3684 struct ieee80211_local *local = sdata->local; 3685 3686 if (local->quiescing) 3687 return; 3688 3689 if (sdata->vif.csa_active) 3690 return; 3691 3692 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 3693 } 3694 3695 static void ieee80211_sta_monitor_work(struct work_struct *work) 3696 { 3697 struct ieee80211_sub_if_data *sdata = 3698 container_of(work, struct ieee80211_sub_if_data, 3699 u.mgd.monitor_work); 3700 3701 ieee80211_mgd_probe_ap(sdata, false); 3702 } 3703 3704 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 3705 { 3706 u32 flags; 3707 3708 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 3709 __ieee80211_stop_poll(sdata); 3710 3711 /* let's probe the connection once */ 3712 flags = sdata->local->hw.flags; 3713 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) 3714 ieee80211_queue_work(&sdata->local->hw, 3715 &sdata->u.mgd.monitor_work); 3716 /* and do all the other regular work too */ 3717 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3718 } 3719 } 3720 3721 #ifdef CONFIG_PM 3722 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 3723 { 3724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3725 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3726 3727 sdata_lock(sdata); 3728 3729 if (ifmgd->auth_data || ifmgd->assoc_data) { 3730 const u8 *bssid = ifmgd->auth_data ? 3731 ifmgd->auth_data->bss->bssid : 3732 ifmgd->assoc_data->bss->bssid; 3733 3734 /* 3735 * If we are trying to authenticate / associate while suspending, 3736 * cfg80211 won't know and won't actually abort those attempts, 3737 * thus we need to do that ourselves. 3738 */ 3739 ieee80211_send_deauth_disassoc(sdata, bssid, 3740 IEEE80211_STYPE_DEAUTH, 3741 WLAN_REASON_DEAUTH_LEAVING, 3742 false, frame_buf); 3743 if (ifmgd->assoc_data) 3744 ieee80211_destroy_assoc_data(sdata, false); 3745 if (ifmgd->auth_data) 3746 ieee80211_destroy_auth_data(sdata, false); 3747 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 3748 IEEE80211_DEAUTH_FRAME_LEN); 3749 } 3750 3751 sdata_unlock(sdata); 3752 } 3753 3754 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 3755 { 3756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3757 3758 sdata_lock(sdata); 3759 if (!ifmgd->associated) { 3760 sdata_unlock(sdata); 3761 return; 3762 } 3763 3764 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 3765 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 3766 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 3767 ieee80211_sta_connection_lost(sdata, 3768 ifmgd->associated->bssid, 3769 WLAN_REASON_UNSPECIFIED, 3770 true); 3771 sdata_unlock(sdata); 3772 return; 3773 } 3774 sdata_unlock(sdata); 3775 } 3776 #endif 3777 3778 /* interface setup */ 3779 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 3780 { 3781 struct ieee80211_if_managed *ifmgd; 3782 3783 ifmgd = &sdata->u.mgd; 3784 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 3785 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 3786 INIT_WORK(&ifmgd->beacon_connection_loss_work, 3787 ieee80211_beacon_connection_loss_work); 3788 INIT_WORK(&ifmgd->csa_connection_drop_work, 3789 ieee80211_csa_connection_drop_work); 3790 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 3791 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 3792 ieee80211_tdls_peer_del_work); 3793 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 3794 (unsigned long) sdata); 3795 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 3796 (unsigned long) sdata); 3797 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 3798 (unsigned long) sdata); 3799 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 3800 (unsigned long) sdata); 3801 3802 ifmgd->flags = 0; 3803 ifmgd->powersave = sdata->wdev.ps; 3804 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 3805 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 3806 ifmgd->p2p_noa_index = -1; 3807 3808 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 3809 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 3810 else 3811 ifmgd->req_smps = IEEE80211_SMPS_OFF; 3812 } 3813 3814 /* scan finished notification */ 3815 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 3816 { 3817 struct ieee80211_sub_if_data *sdata; 3818 3819 /* Restart STA timers */ 3820 rcu_read_lock(); 3821 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 3822 if (ieee80211_sdata_running(sdata)) 3823 ieee80211_restart_sta_timer(sdata); 3824 } 3825 rcu_read_unlock(); 3826 } 3827 3828 int ieee80211_max_network_latency(struct notifier_block *nb, 3829 unsigned long data, void *dummy) 3830 { 3831 s32 latency_usec = (s32) data; 3832 struct ieee80211_local *local = 3833 container_of(nb, struct ieee80211_local, 3834 network_latency_notifier); 3835 3836 mutex_lock(&local->iflist_mtx); 3837 ieee80211_recalc_ps(local, latency_usec); 3838 mutex_unlock(&local->iflist_mtx); 3839 3840 return NOTIFY_OK; 3841 } 3842 3843 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 3844 struct cfg80211_bss *cbss) 3845 { 3846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3847 const u8 *ht_cap_ie, *vht_cap_ie; 3848 const struct ieee80211_ht_cap *ht_cap; 3849 const struct ieee80211_vht_cap *vht_cap; 3850 u8 chains = 1; 3851 3852 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 3853 return chains; 3854 3855 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 3856 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 3857 ht_cap = (void *)(ht_cap_ie + 2); 3858 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 3859 /* 3860 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 3861 * "Tx Unequal Modulation Supported" fields. 3862 */ 3863 } 3864 3865 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 3866 return chains; 3867 3868 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 3869 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 3870 u8 nss; 3871 u16 tx_mcs_map; 3872 3873 vht_cap = (void *)(vht_cap_ie + 2); 3874 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 3875 for (nss = 8; nss > 0; nss--) { 3876 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 3877 IEEE80211_VHT_MCS_NOT_SUPPORTED) 3878 break; 3879 } 3880 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 3881 chains = max(chains, nss); 3882 } 3883 3884 return chains; 3885 } 3886 3887 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 3888 struct cfg80211_bss *cbss) 3889 { 3890 struct ieee80211_local *local = sdata->local; 3891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3892 const struct ieee80211_ht_cap *ht_cap = NULL; 3893 const struct ieee80211_ht_operation *ht_oper = NULL; 3894 const struct ieee80211_vht_operation *vht_oper = NULL; 3895 struct ieee80211_supported_band *sband; 3896 struct cfg80211_chan_def chandef; 3897 int ret; 3898 3899 sband = local->hw.wiphy->bands[cbss->channel->band]; 3900 3901 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 3902 IEEE80211_STA_DISABLE_80P80MHZ | 3903 IEEE80211_STA_DISABLE_160MHZ); 3904 3905 rcu_read_lock(); 3906 3907 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3908 sband->ht_cap.ht_supported) { 3909 const u8 *ht_oper_ie, *ht_cap_ie; 3910 3911 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 3912 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 3913 ht_oper = (void *)(ht_oper_ie + 2); 3914 3915 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 3916 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 3917 ht_cap = (void *)(ht_cap_ie + 2); 3918 3919 if (!ht_cap) { 3920 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 3921 ht_oper = NULL; 3922 } 3923 } 3924 3925 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3926 sband->vht_cap.vht_supported) { 3927 const u8 *vht_oper_ie, *vht_cap; 3928 3929 vht_oper_ie = ieee80211_bss_get_ie(cbss, 3930 WLAN_EID_VHT_OPERATION); 3931 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 3932 vht_oper = (void *)(vht_oper_ie + 2); 3933 if (vht_oper && !ht_oper) { 3934 vht_oper = NULL; 3935 sdata_info(sdata, 3936 "AP advertised VHT without HT, disabling both\n"); 3937 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 3938 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 3939 } 3940 3941 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 3942 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 3943 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 3944 vht_oper = NULL; 3945 } 3946 } 3947 3948 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 3949 cbss->channel, 3950 ht_cap, ht_oper, vht_oper, 3951 &chandef, false); 3952 3953 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 3954 local->rx_chains); 3955 3956 rcu_read_unlock(); 3957 3958 /* will change later if needed */ 3959 sdata->smps_mode = IEEE80211_SMPS_OFF; 3960 3961 mutex_lock(&local->mtx); 3962 /* 3963 * If this fails (possibly due to channel context sharing 3964 * on incompatible channels, e.g. 80+80 and 160 sharing the 3965 * same control channel) try to use a smaller bandwidth. 3966 */ 3967 ret = ieee80211_vif_use_channel(sdata, &chandef, 3968 IEEE80211_CHANCTX_SHARED); 3969 3970 /* don't downgrade for 5 and 10 MHz channels, though. */ 3971 if (chandef.width == NL80211_CHAN_WIDTH_5 || 3972 chandef.width == NL80211_CHAN_WIDTH_10) 3973 goto out; 3974 3975 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 3976 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 3977 ret = ieee80211_vif_use_channel(sdata, &chandef, 3978 IEEE80211_CHANCTX_SHARED); 3979 } 3980 out: 3981 mutex_unlock(&local->mtx); 3982 return ret; 3983 } 3984 3985 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 3986 struct cfg80211_bss *cbss, bool assoc) 3987 { 3988 struct ieee80211_local *local = sdata->local; 3989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3990 struct ieee80211_bss *bss = (void *)cbss->priv; 3991 struct sta_info *new_sta = NULL; 3992 bool have_sta = false; 3993 int err; 3994 3995 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 3996 return -EINVAL; 3997 3998 if (assoc) { 3999 rcu_read_lock(); 4000 have_sta = sta_info_get(sdata, cbss->bssid); 4001 rcu_read_unlock(); 4002 } 4003 4004 if (!have_sta) { 4005 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4006 if (!new_sta) 4007 return -ENOMEM; 4008 } 4009 if (new_sta) { 4010 u32 rates = 0, basic_rates = 0; 4011 bool have_higher_than_11mbit; 4012 int min_rate = INT_MAX, min_rate_index = -1; 4013 struct ieee80211_chanctx_conf *chanctx_conf; 4014 struct ieee80211_supported_band *sband; 4015 const struct cfg80211_bss_ies *ies; 4016 int shift; 4017 u32 rate_flags; 4018 4019 sband = local->hw.wiphy->bands[cbss->channel->band]; 4020 4021 err = ieee80211_prep_channel(sdata, cbss); 4022 if (err) { 4023 sta_info_free(local, new_sta); 4024 return -EINVAL; 4025 } 4026 shift = ieee80211_vif_get_shift(&sdata->vif); 4027 4028 rcu_read_lock(); 4029 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4030 if (WARN_ON(!chanctx_conf)) { 4031 rcu_read_unlock(); 4032 sta_info_free(local, new_sta); 4033 return -EINVAL; 4034 } 4035 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 4036 rcu_read_unlock(); 4037 4038 ieee80211_get_rates(sband, bss->supp_rates, 4039 bss->supp_rates_len, 4040 &rates, &basic_rates, 4041 &have_higher_than_11mbit, 4042 &min_rate, &min_rate_index, 4043 shift, rate_flags); 4044 4045 /* 4046 * This used to be a workaround for basic rates missing 4047 * in the association response frame. Now that we no 4048 * longer use the basic rates from there, it probably 4049 * doesn't happen any more, but keep the workaround so 4050 * in case some *other* APs are buggy in different ways 4051 * we can connect -- with a warning. 4052 */ 4053 if (!basic_rates && min_rate_index >= 0) { 4054 sdata_info(sdata, 4055 "No basic rates, using min rate instead\n"); 4056 basic_rates = BIT(min_rate_index); 4057 } 4058 4059 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4060 sdata->vif.bss_conf.basic_rates = basic_rates; 4061 4062 /* cf. IEEE 802.11 9.2.12 */ 4063 if (cbss->channel->band == IEEE80211_BAND_2GHZ && 4064 have_higher_than_11mbit) 4065 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4066 else 4067 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4068 4069 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4070 4071 /* set timing information */ 4072 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4073 rcu_read_lock(); 4074 ies = rcu_dereference(cbss->beacon_ies); 4075 if (ies) { 4076 const u8 *tim_ie; 4077 4078 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4079 sdata->vif.bss_conf.sync_device_ts = 4080 bss->device_ts_beacon; 4081 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4082 ies->data, ies->len); 4083 if (tim_ie && tim_ie[1] >= 2) 4084 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4085 else 4086 sdata->vif.bss_conf.sync_dtim_count = 0; 4087 } else if (!(local->hw.flags & 4088 IEEE80211_HW_TIMING_BEACON_ONLY)) { 4089 ies = rcu_dereference(cbss->proberesp_ies); 4090 /* must be non-NULL since beacon IEs were NULL */ 4091 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4092 sdata->vif.bss_conf.sync_device_ts = 4093 bss->device_ts_presp; 4094 sdata->vif.bss_conf.sync_dtim_count = 0; 4095 } else { 4096 sdata->vif.bss_conf.sync_tsf = 0; 4097 sdata->vif.bss_conf.sync_device_ts = 0; 4098 sdata->vif.bss_conf.sync_dtim_count = 0; 4099 } 4100 rcu_read_unlock(); 4101 4102 /* tell driver about BSSID, basic rates and timing */ 4103 ieee80211_bss_info_change_notify(sdata, 4104 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4105 BSS_CHANGED_BEACON_INT); 4106 4107 if (assoc) 4108 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4109 4110 err = sta_info_insert(new_sta); 4111 new_sta = NULL; 4112 if (err) { 4113 sdata_info(sdata, 4114 "failed to insert STA entry for the AP (error %d)\n", 4115 err); 4116 return err; 4117 } 4118 } else 4119 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4120 4121 return 0; 4122 } 4123 4124 /* config hooks */ 4125 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4126 struct cfg80211_auth_request *req) 4127 { 4128 struct ieee80211_local *local = sdata->local; 4129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4130 struct ieee80211_mgd_auth_data *auth_data; 4131 u16 auth_alg; 4132 int err; 4133 4134 /* prepare auth data structure */ 4135 4136 switch (req->auth_type) { 4137 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4138 auth_alg = WLAN_AUTH_OPEN; 4139 break; 4140 case NL80211_AUTHTYPE_SHARED_KEY: 4141 if (IS_ERR(local->wep_tx_tfm)) 4142 return -EOPNOTSUPP; 4143 auth_alg = WLAN_AUTH_SHARED_KEY; 4144 break; 4145 case NL80211_AUTHTYPE_FT: 4146 auth_alg = WLAN_AUTH_FT; 4147 break; 4148 case NL80211_AUTHTYPE_NETWORK_EAP: 4149 auth_alg = WLAN_AUTH_LEAP; 4150 break; 4151 case NL80211_AUTHTYPE_SAE: 4152 auth_alg = WLAN_AUTH_SAE; 4153 break; 4154 default: 4155 return -EOPNOTSUPP; 4156 } 4157 4158 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + 4159 req->ie_len, GFP_KERNEL); 4160 if (!auth_data) 4161 return -ENOMEM; 4162 4163 auth_data->bss = req->bss; 4164 4165 if (req->sae_data_len >= 4) { 4166 __le16 *pos = (__le16 *) req->sae_data; 4167 auth_data->sae_trans = le16_to_cpu(pos[0]); 4168 auth_data->sae_status = le16_to_cpu(pos[1]); 4169 memcpy(auth_data->data, req->sae_data + 4, 4170 req->sae_data_len - 4); 4171 auth_data->data_len += req->sae_data_len - 4; 4172 } 4173 4174 if (req->ie && req->ie_len) { 4175 memcpy(&auth_data->data[auth_data->data_len], 4176 req->ie, req->ie_len); 4177 auth_data->data_len += req->ie_len; 4178 } 4179 4180 if (req->key && req->key_len) { 4181 auth_data->key_len = req->key_len; 4182 auth_data->key_idx = req->key_idx; 4183 memcpy(auth_data->key, req->key, req->key_len); 4184 } 4185 4186 auth_data->algorithm = auth_alg; 4187 4188 /* try to authenticate/probe */ 4189 4190 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4191 ifmgd->assoc_data) { 4192 err = -EBUSY; 4193 goto err_free; 4194 } 4195 4196 if (ifmgd->auth_data) 4197 ieee80211_destroy_auth_data(sdata, false); 4198 4199 /* prep auth_data so we don't go into idle on disassoc */ 4200 ifmgd->auth_data = auth_data; 4201 4202 if (ifmgd->associated) { 4203 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4204 4205 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4206 WLAN_REASON_UNSPECIFIED, 4207 false, frame_buf); 4208 4209 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4210 sizeof(frame_buf)); 4211 } 4212 4213 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4214 4215 err = ieee80211_prep_connection(sdata, req->bss, false); 4216 if (err) 4217 goto err_clear; 4218 4219 err = ieee80211_probe_auth(sdata); 4220 if (err) { 4221 sta_info_destroy_addr(sdata, req->bss->bssid); 4222 goto err_clear; 4223 } 4224 4225 /* hold our own reference */ 4226 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4227 return 0; 4228 4229 err_clear: 4230 memset(ifmgd->bssid, 0, ETH_ALEN); 4231 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4232 ifmgd->auth_data = NULL; 4233 err_free: 4234 kfree(auth_data); 4235 return err; 4236 } 4237 4238 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata, 4239 const u8 *wmm_param, int len) 4240 { 4241 const u8 *pos; 4242 size_t left; 4243 4244 if (len < 8) 4245 return false; 4246 4247 if (wmm_param[5] != 1 /* version */) 4248 return false; 4249 4250 pos = wmm_param + 8; 4251 left = len - 8; 4252 4253 for (; left >= 4; left -= 4, pos += 4) { 4254 u8 aifsn = pos[0] & 0x0f; 4255 u8 ecwmin = pos[1] & 0x0f; 4256 u8 ecwmax = (pos[1] & 0xf0) >> 4; 4257 int aci = (pos[0] >> 5) & 0x03; 4258 4259 if (aifsn < 2) { 4260 sdata_info(sdata, 4261 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n", 4262 aifsn, aci); 4263 return false; 4264 } 4265 if (ecwmin > ecwmax) { 4266 sdata_info(sdata, 4267 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n", 4268 ecwmin, ecwmax, aci); 4269 return false; 4270 } 4271 } 4272 4273 return true; 4274 } 4275 4276 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4277 struct cfg80211_assoc_request *req) 4278 { 4279 struct ieee80211_local *local = sdata->local; 4280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4281 struct ieee80211_bss *bss = (void *)req->bss->priv; 4282 struct ieee80211_mgd_assoc_data *assoc_data; 4283 const struct cfg80211_bss_ies *beacon_ies; 4284 struct ieee80211_supported_band *sband; 4285 const u8 *ssidie, *ht_ie, *vht_ie; 4286 int i, err; 4287 4288 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4289 if (!assoc_data) 4290 return -ENOMEM; 4291 4292 rcu_read_lock(); 4293 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4294 if (!ssidie) { 4295 rcu_read_unlock(); 4296 kfree(assoc_data); 4297 return -EINVAL; 4298 } 4299 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4300 assoc_data->ssid_len = ssidie[1]; 4301 rcu_read_unlock(); 4302 4303 if (ifmgd->associated) { 4304 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4305 4306 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4307 WLAN_REASON_UNSPECIFIED, 4308 false, frame_buf); 4309 4310 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4311 sizeof(frame_buf)); 4312 } 4313 4314 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4315 err = -EBUSY; 4316 goto err_free; 4317 } 4318 4319 if (ifmgd->assoc_data) { 4320 err = -EBUSY; 4321 goto err_free; 4322 } 4323 4324 if (ifmgd->auth_data) { 4325 bool match; 4326 4327 /* keep sta info, bssid if matching */ 4328 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4329 ieee80211_destroy_auth_data(sdata, match); 4330 } 4331 4332 /* prepare assoc data */ 4333 4334 ifmgd->beacon_crc_valid = false; 4335 4336 assoc_data->wmm = bss->wmm_used && 4337 (local->hw.queues >= IEEE80211_NUM_ACS); 4338 if (assoc_data->wmm) { 4339 /* try to check validity of WMM params IE */ 4340 const struct cfg80211_bss_ies *ies; 4341 const u8 *wp, *start, *end; 4342 4343 rcu_read_lock(); 4344 ies = rcu_dereference(req->bss->ies); 4345 start = ies->data; 4346 end = start + ies->len; 4347 4348 while (true) { 4349 wp = cfg80211_find_vendor_ie( 4350 WLAN_OUI_MICROSOFT, 4351 WLAN_OUI_TYPE_MICROSOFT_WMM, 4352 start, end - start); 4353 if (!wp) 4354 break; 4355 start = wp + wp[1] + 2; 4356 /* if this IE is too short, try the next */ 4357 if (wp[1] <= 4) 4358 continue; 4359 /* if this IE is WMM params, we found what we wanted */ 4360 if (wp[6] == 1) 4361 break; 4362 } 4363 4364 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2, 4365 wp[1] - 2)) { 4366 assoc_data->wmm = false; 4367 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 4368 } 4369 rcu_read_unlock(); 4370 } 4371 4372 /* 4373 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4374 * We still associate in non-HT mode (11a/b/g) if any one of these 4375 * ciphers is configured as pairwise. 4376 * We can set this to true for non-11n hardware, that'll be checked 4377 * separately along with the peer capabilities. 4378 */ 4379 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4380 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4381 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4382 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4383 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4384 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4385 netdev_info(sdata->dev, 4386 "disabling HT/VHT due to WEP/TKIP use\n"); 4387 } 4388 } 4389 4390 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4391 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4392 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4393 } 4394 4395 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4396 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4397 4398 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4399 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4400 if (!sband->ht_cap.ht_supported || 4401 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4402 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4403 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4404 if (!bss->wmm_used && 4405 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4406 netdev_info(sdata->dev, 4407 "disabling HT as WMM/QoS is not supported by the AP\n"); 4408 } 4409 4410 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4411 if (!sband->vht_cap.vht_supported || 4412 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4413 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4414 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4415 if (!bss->wmm_used && 4416 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4417 netdev_info(sdata->dev, 4418 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4419 } 4420 4421 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4422 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4423 sizeof(ifmgd->ht_capa_mask)); 4424 4425 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4426 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4427 sizeof(ifmgd->vht_capa_mask)); 4428 4429 if (req->ie && req->ie_len) { 4430 memcpy(assoc_data->ie, req->ie, req->ie_len); 4431 assoc_data->ie_len = req->ie_len; 4432 } 4433 4434 assoc_data->bss = req->bss; 4435 4436 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4437 if (ifmgd->powersave) 4438 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4439 else 4440 sdata->smps_mode = IEEE80211_SMPS_OFF; 4441 } else 4442 sdata->smps_mode = ifmgd->req_smps; 4443 4444 assoc_data->capability = req->bss->capability; 4445 assoc_data->supp_rates = bss->supp_rates; 4446 assoc_data->supp_rates_len = bss->supp_rates_len; 4447 4448 rcu_read_lock(); 4449 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4450 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4451 assoc_data->ap_ht_param = 4452 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4453 else 4454 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4455 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4456 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4457 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4458 sizeof(struct ieee80211_vht_cap)); 4459 else 4460 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4461 rcu_read_unlock(); 4462 4463 if (bss->wmm_used && bss->uapsd_supported && 4464 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { 4465 assoc_data->uapsd = true; 4466 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4467 } else { 4468 assoc_data->uapsd = false; 4469 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4470 } 4471 4472 if (req->prev_bssid) 4473 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4474 4475 if (req->use_mfp) { 4476 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4477 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4478 } else { 4479 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4480 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4481 } 4482 4483 if (req->flags & ASSOC_REQ_USE_RRM) 4484 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4485 else 4486 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4487 4488 if (req->crypto.control_port) 4489 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4490 else 4491 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4492 4493 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4494 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4495 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4496 sdata->vif.type); 4497 4498 /* kick off associate process */ 4499 4500 ifmgd->assoc_data = assoc_data; 4501 ifmgd->dtim_period = 0; 4502 ifmgd->have_beacon = false; 4503 4504 err = ieee80211_prep_connection(sdata, req->bss, true); 4505 if (err) 4506 goto err_clear; 4507 4508 rcu_read_lock(); 4509 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4510 4511 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC && 4512 !beacon_ies) { 4513 /* 4514 * Wait up to one beacon interval ... 4515 * should this be more if we miss one? 4516 */ 4517 sdata_info(sdata, "waiting for beacon from %pM\n", 4518 ifmgd->bssid); 4519 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4520 assoc_data->timeout_started = true; 4521 assoc_data->need_beacon = true; 4522 } else if (beacon_ies) { 4523 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4524 beacon_ies->data, 4525 beacon_ies->len); 4526 u8 dtim_count = 0; 4527 4528 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4529 const struct ieee80211_tim_ie *tim; 4530 tim = (void *)(tim_ie + 2); 4531 ifmgd->dtim_period = tim->dtim_period; 4532 dtim_count = tim->dtim_count; 4533 } 4534 ifmgd->have_beacon = true; 4535 assoc_data->timeout = jiffies; 4536 assoc_data->timeout_started = true; 4537 4538 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 4539 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4540 sdata->vif.bss_conf.sync_device_ts = 4541 bss->device_ts_beacon; 4542 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4543 } 4544 } else { 4545 assoc_data->timeout = jiffies; 4546 assoc_data->timeout_started = true; 4547 } 4548 rcu_read_unlock(); 4549 4550 run_again(sdata, assoc_data->timeout); 4551 4552 if (bss->corrupt_data) { 4553 char *corrupt_type = "data"; 4554 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4555 if (bss->corrupt_data & 4556 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4557 corrupt_type = "beacon and probe response"; 4558 else 4559 corrupt_type = "beacon"; 4560 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4561 corrupt_type = "probe response"; 4562 sdata_info(sdata, "associating with AP with corrupt %s\n", 4563 corrupt_type); 4564 } 4565 4566 return 0; 4567 err_clear: 4568 memset(ifmgd->bssid, 0, ETH_ALEN); 4569 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4570 ifmgd->assoc_data = NULL; 4571 err_free: 4572 kfree(assoc_data); 4573 return err; 4574 } 4575 4576 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4577 struct cfg80211_deauth_request *req) 4578 { 4579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4580 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4581 bool tx = !req->local_state_change; 4582 4583 if (ifmgd->auth_data && 4584 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4585 sdata_info(sdata, 4586 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4587 req->bssid, req->reason_code, 4588 ieee80211_get_reason_code_string(req->reason_code)); 4589 4590 drv_mgd_prepare_tx(sdata->local, sdata); 4591 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4592 IEEE80211_STYPE_DEAUTH, 4593 req->reason_code, tx, 4594 frame_buf); 4595 ieee80211_destroy_auth_data(sdata, false); 4596 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4597 IEEE80211_DEAUTH_FRAME_LEN); 4598 4599 return 0; 4600 } 4601 4602 if (ifmgd->associated && 4603 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 4604 sdata_info(sdata, 4605 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 4606 req->bssid, req->reason_code, 4607 ieee80211_get_reason_code_string(req->reason_code)); 4608 4609 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4610 req->reason_code, tx, frame_buf); 4611 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4612 IEEE80211_DEAUTH_FRAME_LEN); 4613 return 0; 4614 } 4615 4616 return -ENOTCONN; 4617 } 4618 4619 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 4620 struct cfg80211_disassoc_request *req) 4621 { 4622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4623 u8 bssid[ETH_ALEN]; 4624 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4625 4626 /* 4627 * cfg80211 should catch this ... but it's racy since 4628 * we can receive a disassoc frame, process it, hand it 4629 * to cfg80211 while that's in a locked section already 4630 * trying to tell us that the user wants to disconnect. 4631 */ 4632 if (ifmgd->associated != req->bss) 4633 return -ENOLINK; 4634 4635 sdata_info(sdata, 4636 "disassociating from %pM by local choice (Reason: %u=%s)\n", 4637 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 4638 4639 memcpy(bssid, req->bss->bssid, ETH_ALEN); 4640 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 4641 req->reason_code, !req->local_state_change, 4642 frame_buf); 4643 4644 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4645 IEEE80211_DEAUTH_FRAME_LEN); 4646 4647 return 0; 4648 } 4649 4650 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 4651 { 4652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4653 4654 /* 4655 * Make sure some work items will not run after this, 4656 * they will not do anything but might not have been 4657 * cancelled when disconnecting. 4658 */ 4659 cancel_work_sync(&ifmgd->monitor_work); 4660 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 4661 cancel_work_sync(&ifmgd->request_smps_work); 4662 cancel_work_sync(&ifmgd->csa_connection_drop_work); 4663 cancel_work_sync(&ifmgd->chswitch_work); 4664 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 4665 4666 sdata_lock(sdata); 4667 if (ifmgd->assoc_data) { 4668 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4669 ieee80211_destroy_assoc_data(sdata, false); 4670 cfg80211_assoc_timeout(sdata->dev, bss); 4671 } 4672 if (ifmgd->auth_data) 4673 ieee80211_destroy_auth_data(sdata, false); 4674 del_timer_sync(&ifmgd->timer); 4675 sdata_unlock(sdata); 4676 } 4677 4678 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 4679 enum nl80211_cqm_rssi_threshold_event rssi_event, 4680 gfp_t gfp) 4681 { 4682 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4683 4684 trace_api_cqm_rssi_notify(sdata, rssi_event); 4685 4686 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); 4687 } 4688 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 4689