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 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/if_ether.h> 16 #include <linux/skbuff.h> 17 #include <linux/if_arp.h> 18 #include <linux/etherdevice.h> 19 #include <linux/moduleparam.h> 20 #include <linux/rtnetlink.h> 21 #include <linux/pm_qos.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 36 #define IEEE80211_AUTH_MAX_TRIES 3 37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 41 #define IEEE80211_ASSOC_MAX_TRIES 3 42 43 static int max_nullfunc_tries = 2; 44 module_param(max_nullfunc_tries, int, 0644); 45 MODULE_PARM_DESC(max_nullfunc_tries, 46 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 47 48 static int max_probe_tries = 5; 49 module_param(max_probe_tries, int, 0644); 50 MODULE_PARM_DESC(max_probe_tries, 51 "Maximum probe tries before disconnecting (reason 4)."); 52 53 /* 54 * Beacon loss timeout is calculated as N frames times the 55 * advertised beacon interval. This may need to be somewhat 56 * higher than what hardware might detect to account for 57 * delays in the host processing frames. But since we also 58 * probe on beacon miss before declaring the connection lost 59 * default to what we want. 60 */ 61 static int beacon_loss_count = 7; 62 module_param(beacon_loss_count, int, 0644); 63 MODULE_PARM_DESC(beacon_loss_count, 64 "Number of beacon intervals before we decide beacon was lost."); 65 66 /* 67 * Time the connection can be idle before we probe 68 * it to see if we can still talk to the AP. 69 */ 70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 71 /* 72 * Time we wait for a probe response after sending 73 * a probe request because of beacon loss or for 74 * checking the connection still works. 75 */ 76 static int probe_wait_ms = 500; 77 module_param(probe_wait_ms, int, 0644); 78 MODULE_PARM_DESC(probe_wait_ms, 79 "Maximum time(ms) to wait for probe response" 80 " before disconnecting (reason 4)."); 81 82 /* 83 * Weight given to the latest Beacon frame when calculating average signal 84 * strength for Beacon frames received in the current BSS. This must be 85 * between 1 and 15. 86 */ 87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3 88 89 /* 90 * How many Beacon frames need to have been used in average signal strength 91 * before starting to indicate signal change events. 92 */ 93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 94 95 /* 96 * We can have multiple work items (and connection probing) 97 * scheduling this timer, but we need to take care to only 98 * reschedule it when it should fire _earlier_ than it was 99 * asked for before, or if it's not pending right now. This 100 * function ensures that. Note that it then is required to 101 * run this function for all timeouts after the first one 102 * has happened -- the work that runs from this timer will 103 * do that. 104 */ 105 static void run_again(struct ieee80211_sub_if_data *sdata, 106 unsigned long timeout) 107 { 108 sdata_assert_lock(sdata); 109 110 if (!timer_pending(&sdata->u.mgd.timer) || 111 time_before(timeout, sdata->u.mgd.timer.expires)) 112 mod_timer(&sdata->u.mgd.timer, timeout); 113 } 114 115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 116 { 117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 118 return; 119 120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 121 return; 122 123 mod_timer(&sdata->u.mgd.bcn_mon_timer, 124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 125 } 126 127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 128 { 129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 130 131 if (unlikely(!sdata->u.mgd.associated)) 132 return; 133 134 ifmgd->probe_send_count = 0; 135 136 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 137 return; 138 139 mod_timer(&sdata->u.mgd.conn_mon_timer, 140 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 141 } 142 143 static int ecw2cw(int ecw) 144 { 145 return (1 << ecw) - 1; 146 } 147 148 static u32 149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 150 struct ieee80211_supported_band *sband, 151 struct ieee80211_channel *channel, 152 const struct ieee80211_ht_operation *ht_oper, 153 const struct ieee80211_vht_operation *vht_oper, 154 struct cfg80211_chan_def *chandef, bool tracking) 155 { 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 157 struct cfg80211_chan_def vht_chandef; 158 u32 ht_cfreq, ret; 159 160 chandef->chan = channel; 161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 162 chandef->center_freq1 = channel->center_freq; 163 chandef->center_freq2 = 0; 164 165 if (!ht_oper || !sband->ht_cap.ht_supported) { 166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 167 goto out; 168 } 169 170 chandef->width = NL80211_CHAN_WIDTH_20; 171 172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 173 channel->band); 174 /* check that channel matches the right operating channel */ 175 if (!tracking && channel->center_freq != ht_cfreq) { 176 /* 177 * It's possible that some APs are confused here; 178 * Netgear WNDR3700 sometimes reports 4 higher than 179 * the actual channel in association responses, but 180 * since we look at probe response/beacon data here 181 * it should be OK. 182 */ 183 sdata_info(sdata, 184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 185 channel->center_freq, ht_cfreq, 186 ht_oper->primary_chan, channel->band); 187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 188 goto out; 189 } 190 191 /* check 40 MHz support, if we have it */ 192 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 193 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 195 chandef->width = NL80211_CHAN_WIDTH_40; 196 chandef->center_freq1 += 10; 197 break; 198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 199 chandef->width = NL80211_CHAN_WIDTH_40; 200 chandef->center_freq1 -= 10; 201 break; 202 } 203 } else { 204 /* 40 MHz (and 80 MHz) must be supported for VHT */ 205 ret = IEEE80211_STA_DISABLE_VHT; 206 /* also mark 40 MHz disabled */ 207 ret |= IEEE80211_STA_DISABLE_40MHZ; 208 goto out; 209 } 210 211 if (!vht_oper || !sband->vht_cap.vht_supported) { 212 ret = IEEE80211_STA_DISABLE_VHT; 213 goto out; 214 } 215 216 vht_chandef.chan = channel; 217 vht_chandef.center_freq1 = 218 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, 219 channel->band); 220 vht_chandef.center_freq2 = 0; 221 222 switch (vht_oper->chan_width) { 223 case IEEE80211_VHT_CHANWIDTH_USE_HT: 224 vht_chandef.width = chandef->width; 225 vht_chandef.center_freq1 = chandef->center_freq1; 226 break; 227 case IEEE80211_VHT_CHANWIDTH_80MHZ: 228 vht_chandef.width = NL80211_CHAN_WIDTH_80; 229 break; 230 case IEEE80211_VHT_CHANWIDTH_160MHZ: 231 vht_chandef.width = NL80211_CHAN_WIDTH_160; 232 break; 233 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 234 vht_chandef.width = NL80211_CHAN_WIDTH_80P80; 235 vht_chandef.center_freq2 = 236 ieee80211_channel_to_frequency( 237 vht_oper->center_freq_seg2_idx, 238 channel->band); 239 break; 240 default: 241 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 242 sdata_info(sdata, 243 "AP VHT operation IE has invalid channel width (%d), disable VHT\n", 244 vht_oper->chan_width); 245 ret = IEEE80211_STA_DISABLE_VHT; 246 goto out; 247 } 248 249 if (!cfg80211_chandef_valid(&vht_chandef)) { 250 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 251 sdata_info(sdata, 252 "AP VHT information is invalid, disable VHT\n"); 253 ret = IEEE80211_STA_DISABLE_VHT; 254 goto out; 255 } 256 257 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 258 ret = 0; 259 goto out; 260 } 261 262 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 264 sdata_info(sdata, 265 "AP VHT information doesn't match HT, disable VHT\n"); 266 ret = IEEE80211_STA_DISABLE_VHT; 267 goto out; 268 } 269 270 *chandef = vht_chandef; 271 272 ret = 0; 273 274 out: 275 /* 276 * When tracking the current AP, don't do any further checks if the 277 * new chandef is identical to the one we're currently using for the 278 * connection. This keeps us from playing ping-pong with regulatory, 279 * without it the following can happen (for example): 280 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 281 * - AP advertises regdom US 282 * - CRDA loads regdom US with 80 MHz prohibited (old database) 283 * - the code below detects an unsupported channel, downgrades, and 284 * we disconnect from the AP in the caller 285 * - disconnect causes CRDA to reload world regdomain and the game 286 * starts anew. 287 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 288 * 289 * It seems possible that there are still scenarios with CSA or real 290 * bandwidth changes where a this could happen, but those cases are 291 * less common and wouldn't completely prevent using the AP. 292 */ 293 if (tracking && 294 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 295 return ret; 296 297 /* don't print the message below for VHT mismatch if VHT is disabled */ 298 if (ret & IEEE80211_STA_DISABLE_VHT) 299 vht_chandef = *chandef; 300 301 /* 302 * Ignore the DISABLED flag when we're already connected and only 303 * tracking the APs beacon for bandwidth changes - otherwise we 304 * might get disconnected here if we connect to an AP, update our 305 * regulatory information based on the AP's country IE and the 306 * information we have is wrong/outdated and disables the channel 307 * that we're actually using for the connection to the AP. 308 */ 309 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 310 tracking ? 0 : 311 IEEE80211_CHAN_DISABLED)) { 312 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 313 ret = IEEE80211_STA_DISABLE_HT | 314 IEEE80211_STA_DISABLE_VHT; 315 break; 316 } 317 318 ret |= ieee80211_chandef_downgrade(chandef); 319 } 320 321 if (chandef->width != vht_chandef.width && !tracking) 322 sdata_info(sdata, 323 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 324 325 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 326 return ret; 327 } 328 329 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 330 struct sta_info *sta, 331 const struct ieee80211_ht_operation *ht_oper, 332 const struct ieee80211_vht_operation *vht_oper, 333 const u8 *bssid, u32 *changed) 334 { 335 struct ieee80211_local *local = sdata->local; 336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 337 struct ieee80211_supported_band *sband; 338 struct ieee80211_channel *chan; 339 struct cfg80211_chan_def chandef; 340 u16 ht_opmode; 341 u32 flags; 342 enum ieee80211_sta_rx_bandwidth new_sta_bw; 343 int ret; 344 345 /* if HT was/is disabled, don't track any bandwidth changes */ 346 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 347 return 0; 348 349 /* don't check VHT if we associated as non-VHT station */ 350 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 351 vht_oper = NULL; 352 353 if (WARN_ON_ONCE(!sta)) 354 return -EINVAL; 355 356 /* 357 * if bss configuration changed store the new one - 358 * this may be applicable even if channel is identical 359 */ 360 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 361 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 362 *changed |= BSS_CHANGED_HT; 363 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 364 } 365 366 chan = sdata->vif.bss_conf.chandef.chan; 367 sband = local->hw.wiphy->bands[chan->band]; 368 369 /* calculate new channel (type) based on HT/VHT operation IEs */ 370 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper, 371 vht_oper, &chandef, true); 372 373 /* 374 * Downgrade the new channel if we associated with restricted 375 * capabilities. For example, if we associated as a 20 MHz STA 376 * to a 40 MHz AP (due to regulatory, capabilities or config 377 * reasons) then switching to a 40 MHz channel now won't do us 378 * any good -- we couldn't use it with the AP. 379 */ 380 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 381 chandef.width == NL80211_CHAN_WIDTH_80P80) 382 flags |= ieee80211_chandef_downgrade(&chandef); 383 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 384 chandef.width == NL80211_CHAN_WIDTH_160) 385 flags |= ieee80211_chandef_downgrade(&chandef); 386 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 387 chandef.width > NL80211_CHAN_WIDTH_20) 388 flags |= ieee80211_chandef_downgrade(&chandef); 389 390 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 391 return 0; 392 393 sdata_info(sdata, 394 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 395 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 396 chandef.center_freq1, chandef.center_freq2); 397 398 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 399 IEEE80211_STA_DISABLE_VHT | 400 IEEE80211_STA_DISABLE_40MHZ | 401 IEEE80211_STA_DISABLE_80P80MHZ | 402 IEEE80211_STA_DISABLE_160MHZ)) || 403 !cfg80211_chandef_valid(&chandef)) { 404 sdata_info(sdata, 405 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 406 ifmgd->bssid); 407 return -EINVAL; 408 } 409 410 switch (chandef.width) { 411 case NL80211_CHAN_WIDTH_20_NOHT: 412 case NL80211_CHAN_WIDTH_20: 413 new_sta_bw = IEEE80211_STA_RX_BW_20; 414 break; 415 case NL80211_CHAN_WIDTH_40: 416 new_sta_bw = IEEE80211_STA_RX_BW_40; 417 break; 418 case NL80211_CHAN_WIDTH_80: 419 new_sta_bw = IEEE80211_STA_RX_BW_80; 420 break; 421 case NL80211_CHAN_WIDTH_80P80: 422 case NL80211_CHAN_WIDTH_160: 423 new_sta_bw = IEEE80211_STA_RX_BW_160; 424 break; 425 default: 426 return -EINVAL; 427 } 428 429 if (new_sta_bw > sta->cur_max_bandwidth) 430 new_sta_bw = sta->cur_max_bandwidth; 431 432 if (new_sta_bw < sta->sta.bandwidth) { 433 sta->sta.bandwidth = new_sta_bw; 434 rate_control_rate_update(local, sband, sta, 435 IEEE80211_RC_BW_CHANGED); 436 } 437 438 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 439 if (ret) { 440 sdata_info(sdata, 441 "AP %pM changed bandwidth to incompatible one - disconnect\n", 442 ifmgd->bssid); 443 return ret; 444 } 445 446 if (new_sta_bw > sta->sta.bandwidth) { 447 sta->sta.bandwidth = new_sta_bw; 448 rate_control_rate_update(local, sband, sta, 449 IEEE80211_RC_BW_CHANGED); 450 } 451 452 return 0; 453 } 454 455 /* frame sending functions */ 456 457 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 458 struct sk_buff *skb, u8 ap_ht_param, 459 struct ieee80211_supported_band *sband, 460 struct ieee80211_channel *channel, 461 enum ieee80211_smps_mode smps) 462 { 463 u8 *pos; 464 u32 flags = channel->flags; 465 u16 cap; 466 struct ieee80211_sta_ht_cap ht_cap; 467 468 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 469 470 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 471 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 472 473 /* determine capability flags */ 474 cap = ht_cap.cap; 475 476 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 477 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 478 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 479 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 480 cap &= ~IEEE80211_HT_CAP_SGI_40; 481 } 482 break; 483 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 484 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 485 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 486 cap &= ~IEEE80211_HT_CAP_SGI_40; 487 } 488 break; 489 } 490 491 /* 492 * If 40 MHz was disabled associate as though we weren't 493 * capable of 40 MHz -- some broken APs will never fall 494 * back to trying to transmit in 20 MHz. 495 */ 496 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 497 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 498 cap &= ~IEEE80211_HT_CAP_SGI_40; 499 } 500 501 /* set SM PS mode properly */ 502 cap &= ~IEEE80211_HT_CAP_SM_PS; 503 switch (smps) { 504 case IEEE80211_SMPS_AUTOMATIC: 505 case IEEE80211_SMPS_NUM_MODES: 506 WARN_ON(1); 507 case IEEE80211_SMPS_OFF: 508 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 509 IEEE80211_HT_CAP_SM_PS_SHIFT; 510 break; 511 case IEEE80211_SMPS_STATIC: 512 cap |= WLAN_HT_CAP_SM_PS_STATIC << 513 IEEE80211_HT_CAP_SM_PS_SHIFT; 514 break; 515 case IEEE80211_SMPS_DYNAMIC: 516 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 517 IEEE80211_HT_CAP_SM_PS_SHIFT; 518 break; 519 } 520 521 /* reserve and fill IE */ 522 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 523 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 524 } 525 526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 527 struct sk_buff *skb, 528 struct ieee80211_supported_band *sband, 529 struct ieee80211_vht_cap *ap_vht_cap) 530 { 531 u8 *pos; 532 u32 cap; 533 struct ieee80211_sta_vht_cap vht_cap; 534 u32 mask, ap_bf_sts, our_bf_sts; 535 536 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 537 538 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 539 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 540 541 /* determine capability flags */ 542 cap = vht_cap.cap; 543 544 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 545 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ; 546 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 547 } 548 549 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 550 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 551 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 552 } 553 554 /* 555 * Some APs apparently get confused if our capabilities are better 556 * than theirs, so restrict what we advertise in the assoc request. 557 */ 558 if (!(ap_vht_cap->vht_cap_info & 559 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 560 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; 561 562 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 563 564 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 565 our_bf_sts = cap & mask; 566 567 if (ap_bf_sts < our_bf_sts) { 568 cap &= ~mask; 569 cap |= ap_bf_sts; 570 } 571 572 /* reserve and fill IE */ 573 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 574 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 575 } 576 577 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 578 { 579 struct ieee80211_local *local = sdata->local; 580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 581 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 582 struct sk_buff *skb; 583 struct ieee80211_mgmt *mgmt; 584 u8 *pos, qos_info; 585 size_t offset = 0, noffset; 586 int i, count, rates_len, supp_rates_len, shift; 587 u16 capab; 588 struct ieee80211_supported_band *sband; 589 struct ieee80211_chanctx_conf *chanctx_conf; 590 struct ieee80211_channel *chan; 591 u32 rate_flags, rates = 0; 592 593 sdata_assert_lock(sdata); 594 595 rcu_read_lock(); 596 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 597 if (WARN_ON(!chanctx_conf)) { 598 rcu_read_unlock(); 599 return; 600 } 601 chan = chanctx_conf->def.chan; 602 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 603 rcu_read_unlock(); 604 sband = local->hw.wiphy->bands[chan->band]; 605 shift = ieee80211_vif_get_shift(&sdata->vif); 606 607 if (assoc_data->supp_rates_len) { 608 /* 609 * Get all rates supported by the device and the AP as 610 * some APs don't like getting a superset of their rates 611 * in the association request (e.g. D-Link DAP 1353 in 612 * b-only mode)... 613 */ 614 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 615 assoc_data->supp_rates, 616 assoc_data->supp_rates_len, 617 &rates); 618 } else { 619 /* 620 * In case AP not provide any supported rates information 621 * before association, we send information element(s) with 622 * all rates that we support. 623 */ 624 rates_len = 0; 625 for (i = 0; i < sband->n_bitrates; i++) { 626 if ((rate_flags & sband->bitrates[i].flags) 627 != rate_flags) 628 continue; 629 rates |= BIT(i); 630 rates_len++; 631 } 632 } 633 634 skb = alloc_skb(local->hw.extra_tx_headroom + 635 sizeof(*mgmt) + /* bit too much but doesn't matter */ 636 2 + assoc_data->ssid_len + /* SSID */ 637 4 + rates_len + /* (extended) rates */ 638 4 + /* power capability */ 639 2 + 2 * sband->n_channels + /* supported channels */ 640 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 641 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 642 assoc_data->ie_len + /* extra IEs */ 643 9, /* WMM */ 644 GFP_KERNEL); 645 if (!skb) 646 return; 647 648 skb_reserve(skb, local->hw.extra_tx_headroom); 649 650 capab = WLAN_CAPABILITY_ESS; 651 652 if (sband->band == IEEE80211_BAND_2GHZ) { 653 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) 654 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 655 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) 656 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 657 } 658 659 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 660 capab |= WLAN_CAPABILITY_PRIVACY; 661 662 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 663 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) 664 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 665 666 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); 667 memset(mgmt, 0, 24); 668 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 669 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 670 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 671 672 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 673 skb_put(skb, 10); 674 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 675 IEEE80211_STYPE_REASSOC_REQ); 676 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 677 mgmt->u.reassoc_req.listen_interval = 678 cpu_to_le16(local->hw.conf.listen_interval); 679 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 680 ETH_ALEN); 681 } else { 682 skb_put(skb, 4); 683 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 684 IEEE80211_STYPE_ASSOC_REQ); 685 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 686 mgmt->u.assoc_req.listen_interval = 687 cpu_to_le16(local->hw.conf.listen_interval); 688 } 689 690 /* SSID */ 691 pos = skb_put(skb, 2 + assoc_data->ssid_len); 692 *pos++ = WLAN_EID_SSID; 693 *pos++ = assoc_data->ssid_len; 694 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 695 696 /* add all rates which were marked to be used above */ 697 supp_rates_len = rates_len; 698 if (supp_rates_len > 8) 699 supp_rates_len = 8; 700 701 pos = skb_put(skb, supp_rates_len + 2); 702 *pos++ = WLAN_EID_SUPP_RATES; 703 *pos++ = supp_rates_len; 704 705 count = 0; 706 for (i = 0; i < sband->n_bitrates; i++) { 707 if (BIT(i) & rates) { 708 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 709 5 * (1 << shift)); 710 *pos++ = (u8) rate; 711 if (++count == 8) 712 break; 713 } 714 } 715 716 if (rates_len > count) { 717 pos = skb_put(skb, rates_len - count + 2); 718 *pos++ = WLAN_EID_EXT_SUPP_RATES; 719 *pos++ = rates_len - count; 720 721 for (i++; i < sband->n_bitrates; i++) { 722 if (BIT(i) & rates) { 723 int rate; 724 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 725 5 * (1 << shift)); 726 *pos++ = (u8) rate; 727 } 728 } 729 } 730 731 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 732 /* 1. power capabilities */ 733 pos = skb_put(skb, 4); 734 *pos++ = WLAN_EID_PWR_CAPABILITY; 735 *pos++ = 2; 736 *pos++ = 0; /* min tx power */ 737 /* max tx power */ 738 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 739 740 /* 2. supported channels */ 741 /* TODO: get this in reg domain format */ 742 pos = skb_put(skb, 2 * sband->n_channels + 2); 743 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 744 *pos++ = 2 * sband->n_channels; 745 for (i = 0; i < sband->n_channels; i++) { 746 *pos++ = ieee80211_frequency_to_channel( 747 sband->channels[i].center_freq); 748 *pos++ = 1; /* one channel in the subband*/ 749 } 750 } 751 752 /* if present, add any custom IEs that go before HT */ 753 if (assoc_data->ie_len) { 754 static const u8 before_ht[] = { 755 WLAN_EID_SSID, 756 WLAN_EID_SUPP_RATES, 757 WLAN_EID_EXT_SUPP_RATES, 758 WLAN_EID_PWR_CAPABILITY, 759 WLAN_EID_SUPPORTED_CHANNELS, 760 WLAN_EID_RSN, 761 WLAN_EID_QOS_CAPA, 762 WLAN_EID_RRM_ENABLED_CAPABILITIES, 763 WLAN_EID_MOBILITY_DOMAIN, 764 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 765 }; 766 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 767 before_ht, ARRAY_SIZE(before_ht), 768 offset); 769 pos = skb_put(skb, noffset - offset); 770 memcpy(pos, assoc_data->ie + offset, noffset - offset); 771 offset = noffset; 772 } 773 774 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 775 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 776 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 777 778 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 779 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 780 sband, chan, sdata->smps_mode); 781 782 /* if present, add any custom IEs that go before VHT */ 783 if (assoc_data->ie_len) { 784 static const u8 before_vht[] = { 785 WLAN_EID_SSID, 786 WLAN_EID_SUPP_RATES, 787 WLAN_EID_EXT_SUPP_RATES, 788 WLAN_EID_PWR_CAPABILITY, 789 WLAN_EID_SUPPORTED_CHANNELS, 790 WLAN_EID_RSN, 791 WLAN_EID_QOS_CAPA, 792 WLAN_EID_RRM_ENABLED_CAPABILITIES, 793 WLAN_EID_MOBILITY_DOMAIN, 794 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 795 WLAN_EID_HT_CAPABILITY, 796 WLAN_EID_BSS_COEX_2040, 797 WLAN_EID_EXT_CAPABILITY, 798 WLAN_EID_QOS_TRAFFIC_CAPA, 799 WLAN_EID_TIM_BCAST_REQ, 800 WLAN_EID_INTERWORKING, 801 }; 802 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 803 before_vht, ARRAY_SIZE(before_vht), 804 offset); 805 pos = skb_put(skb, noffset - offset); 806 memcpy(pos, assoc_data->ie + offset, noffset - offset); 807 offset = noffset; 808 } 809 810 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 811 ieee80211_add_vht_ie(sdata, skb, sband, 812 &assoc_data->ap_vht_cap); 813 814 /* if present, add any custom non-vendor IEs that go after HT */ 815 if (assoc_data->ie_len) { 816 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 817 assoc_data->ie_len, 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 (assoc_data->wmm) { 825 if (assoc_data->uapsd) { 826 qos_info = ifmgd->uapsd_queues; 827 qos_info |= (ifmgd->uapsd_max_sp_len << 828 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 829 } else { 830 qos_info = 0; 831 } 832 833 pos = skb_put(skb, 9); 834 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 835 *pos++ = 7; /* len */ 836 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ 837 *pos++ = 0x50; 838 *pos++ = 0xf2; 839 *pos++ = 2; /* WME */ 840 *pos++ = 0; /* WME info */ 841 *pos++ = 1; /* WME ver */ 842 *pos++ = qos_info; 843 } 844 845 /* add any remaining custom (i.e. vendor specific here) IEs */ 846 if (assoc_data->ie_len) { 847 noffset = assoc_data->ie_len; 848 pos = skb_put(skb, noffset - offset); 849 memcpy(pos, assoc_data->ie + offset, noffset - offset); 850 } 851 852 drv_mgd_prepare_tx(local, sdata); 853 854 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 855 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 856 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 857 IEEE80211_TX_INTFL_MLME_CONN_TX; 858 ieee80211_tx_skb(sdata, skb); 859 } 860 861 void ieee80211_send_pspoll(struct ieee80211_local *local, 862 struct ieee80211_sub_if_data *sdata) 863 { 864 struct ieee80211_pspoll *pspoll; 865 struct sk_buff *skb; 866 867 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 868 if (!skb) 869 return; 870 871 pspoll = (struct ieee80211_pspoll *) skb->data; 872 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 873 874 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 875 ieee80211_tx_skb(sdata, skb); 876 } 877 878 void ieee80211_send_nullfunc(struct ieee80211_local *local, 879 struct ieee80211_sub_if_data *sdata, 880 int powersave) 881 { 882 struct sk_buff *skb; 883 struct ieee80211_hdr_3addr *nullfunc; 884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 885 886 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 887 if (!skb) 888 return; 889 890 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 891 if (powersave) 892 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 893 894 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 895 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 896 897 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 898 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 899 900 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 901 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 902 903 ieee80211_tx_skb(sdata, skb); 904 } 905 906 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 907 struct ieee80211_sub_if_data *sdata) 908 { 909 struct sk_buff *skb; 910 struct ieee80211_hdr *nullfunc; 911 __le16 fc; 912 913 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 914 return; 915 916 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 917 if (!skb) 918 return; 919 920 skb_reserve(skb, local->hw.extra_tx_headroom); 921 922 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); 923 memset(nullfunc, 0, 30); 924 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 925 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 926 nullfunc->frame_control = fc; 927 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 928 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 929 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 930 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 931 932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 933 ieee80211_tx_skb(sdata, skb); 934 } 935 936 /* spectrum management related things */ 937 static void ieee80211_chswitch_work(struct work_struct *work) 938 { 939 struct ieee80211_sub_if_data *sdata = 940 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 941 struct ieee80211_local *local = sdata->local; 942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 943 u32 changed = 0; 944 int ret; 945 946 if (!ieee80211_sdata_running(sdata)) 947 return; 948 949 sdata_lock(sdata); 950 if (!ifmgd->associated) 951 goto out; 952 953 mutex_lock(&local->mtx); 954 ret = ieee80211_vif_change_channel(sdata, &changed); 955 mutex_unlock(&local->mtx); 956 if (ret) { 957 sdata_info(sdata, 958 "vif channel switch failed, disconnecting\n"); 959 ieee80211_queue_work(&sdata->local->hw, 960 &ifmgd->csa_connection_drop_work); 961 goto out; 962 } 963 964 if (!local->use_chanctx) { 965 local->_oper_chandef = sdata->csa_chandef; 966 /* Call "hw_config" only if doing sw channel switch. 967 * Otherwise update the channel directly 968 */ 969 if (!local->ops->channel_switch) 970 ieee80211_hw_config(local, 0); 971 else 972 local->hw.conf.chandef = local->_oper_chandef; 973 } 974 975 /* XXX: shouldn't really modify cfg80211-owned data! */ 976 ifmgd->associated->channel = sdata->csa_chandef.chan; 977 978 /* XXX: wait for a beacon first? */ 979 ieee80211_wake_queues_by_reason(&local->hw, 980 IEEE80211_MAX_QUEUE_MAP, 981 IEEE80211_QUEUE_STOP_REASON_CSA); 982 983 ieee80211_bss_info_change_notify(sdata, changed); 984 985 out: 986 sdata->vif.csa_active = false; 987 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; 988 sdata_unlock(sdata); 989 } 990 991 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 992 { 993 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 995 996 trace_api_chswitch_done(sdata, success); 997 if (!success) { 998 sdata_info(sdata, 999 "driver channel switch failed, disconnecting\n"); 1000 ieee80211_queue_work(&sdata->local->hw, 1001 &ifmgd->csa_connection_drop_work); 1002 } else { 1003 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1004 } 1005 } 1006 EXPORT_SYMBOL(ieee80211_chswitch_done); 1007 1008 static void ieee80211_chswitch_timer(unsigned long data) 1009 { 1010 struct ieee80211_sub_if_data *sdata = 1011 (struct ieee80211_sub_if_data *) data; 1012 1013 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1014 } 1015 1016 static void 1017 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1018 u64 timestamp, struct ieee802_11_elems *elems, 1019 bool beacon) 1020 { 1021 struct ieee80211_local *local = sdata->local; 1022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1023 struct cfg80211_bss *cbss = ifmgd->associated; 1024 struct ieee80211_chanctx *chanctx; 1025 enum ieee80211_band current_band; 1026 struct ieee80211_csa_ie csa_ie; 1027 int res; 1028 1029 sdata_assert_lock(sdata); 1030 1031 if (!cbss) 1032 return; 1033 1034 if (local->scanning) 1035 return; 1036 1037 /* disregard subsequent announcements if we are already processing */ 1038 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) 1039 return; 1040 1041 current_band = cbss->channel->band; 1042 memset(&csa_ie, 0, sizeof(csa_ie)); 1043 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band, 1044 ifmgd->flags, 1045 ifmgd->associated->bssid, &csa_ie); 1046 if (res < 0) 1047 ieee80211_queue_work(&local->hw, 1048 &ifmgd->csa_connection_drop_work); 1049 if (res) 1050 return; 1051 1052 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1053 IEEE80211_CHAN_DISABLED)) { 1054 sdata_info(sdata, 1055 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1056 ifmgd->associated->bssid, 1057 csa_ie.chandef.chan->center_freq, 1058 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1059 csa_ie.chandef.center_freq2); 1060 ieee80211_queue_work(&local->hw, 1061 &ifmgd->csa_connection_drop_work); 1062 return; 1063 } 1064 1065 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; 1066 1067 mutex_lock(&local->chanctx_mtx); 1068 if (local->use_chanctx) { 1069 u32 num_chanctx = 0; 1070 list_for_each_entry(chanctx, &local->chanctx_list, list) 1071 num_chanctx++; 1072 1073 if (num_chanctx > 1 || 1074 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) { 1075 sdata_info(sdata, 1076 "not handling chan-switch with channel contexts\n"); 1077 ieee80211_queue_work(&local->hw, 1078 &ifmgd->csa_connection_drop_work); 1079 mutex_unlock(&local->chanctx_mtx); 1080 return; 1081 } 1082 } 1083 1084 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) { 1085 ieee80211_queue_work(&local->hw, 1086 &ifmgd->csa_connection_drop_work); 1087 mutex_unlock(&local->chanctx_mtx); 1088 return; 1089 } 1090 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf), 1091 struct ieee80211_chanctx, conf); 1092 if (chanctx->refcount > 1) { 1093 sdata_info(sdata, 1094 "channel switch with multiple interfaces on the same channel, disconnecting\n"); 1095 ieee80211_queue_work(&local->hw, 1096 &ifmgd->csa_connection_drop_work); 1097 mutex_unlock(&local->chanctx_mtx); 1098 return; 1099 } 1100 mutex_unlock(&local->chanctx_mtx); 1101 1102 sdata->csa_chandef = csa_ie.chandef; 1103 sdata->vif.csa_active = true; 1104 1105 if (csa_ie.mode) 1106 ieee80211_stop_queues_by_reason(&local->hw, 1107 IEEE80211_MAX_QUEUE_MAP, 1108 IEEE80211_QUEUE_STOP_REASON_CSA); 1109 1110 if (local->ops->channel_switch) { 1111 /* use driver's channel switch callback */ 1112 struct ieee80211_channel_switch ch_switch = { 1113 .timestamp = timestamp, 1114 .block_tx = csa_ie.mode, 1115 .chandef = csa_ie.chandef, 1116 .count = csa_ie.count, 1117 }; 1118 1119 drv_channel_switch(local, &ch_switch); 1120 return; 1121 } 1122 1123 /* channel switch handled in software */ 1124 if (csa_ie.count <= 1) 1125 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1126 else 1127 mod_timer(&ifmgd->chswitch_timer, 1128 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval)); 1129 } 1130 1131 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1132 struct ieee80211_channel *channel, 1133 const u8 *country_ie, u8 country_ie_len, 1134 const u8 *pwr_constr_elem) 1135 { 1136 struct ieee80211_country_ie_triplet *triplet; 1137 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1138 int i, chan_pwr, chan_increment, new_ap_level; 1139 bool have_chan_pwr = false; 1140 1141 /* Invalid IE */ 1142 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1143 return 0; 1144 1145 triplet = (void *)(country_ie + 3); 1146 country_ie_len -= 3; 1147 1148 switch (channel->band) { 1149 default: 1150 WARN_ON_ONCE(1); 1151 /* fall through */ 1152 case IEEE80211_BAND_2GHZ: 1153 case IEEE80211_BAND_60GHZ: 1154 chan_increment = 1; 1155 break; 1156 case IEEE80211_BAND_5GHZ: 1157 chan_increment = 4; 1158 break; 1159 } 1160 1161 /* find channel */ 1162 while (country_ie_len >= 3) { 1163 u8 first_channel = triplet->chans.first_channel; 1164 1165 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1166 goto next; 1167 1168 for (i = 0; i < triplet->chans.num_channels; i++) { 1169 if (first_channel + i * chan_increment == chan) { 1170 have_chan_pwr = true; 1171 chan_pwr = triplet->chans.max_power; 1172 break; 1173 } 1174 } 1175 if (have_chan_pwr) 1176 break; 1177 1178 next: 1179 triplet++; 1180 country_ie_len -= 3; 1181 } 1182 1183 if (!have_chan_pwr) 1184 return 0; 1185 1186 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem); 1187 1188 if (sdata->ap_power_level == new_ap_level) 1189 return 0; 1190 1191 sdata_info(sdata, 1192 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1193 new_ap_level, chan_pwr, *pwr_constr_elem, 1194 sdata->u.mgd.bssid); 1195 sdata->ap_power_level = new_ap_level; 1196 if (__ieee80211_recalc_txpower(sdata)) 1197 return BSS_CHANGED_TXPOWER; 1198 return 0; 1199 } 1200 1201 /* powersave */ 1202 static void ieee80211_enable_ps(struct ieee80211_local *local, 1203 struct ieee80211_sub_if_data *sdata) 1204 { 1205 struct ieee80211_conf *conf = &local->hw.conf; 1206 1207 /* 1208 * If we are scanning right now then the parameters will 1209 * take effect when scan finishes. 1210 */ 1211 if (local->scanning) 1212 return; 1213 1214 if (conf->dynamic_ps_timeout > 0 && 1215 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { 1216 mod_timer(&local->dynamic_ps_timer, jiffies + 1217 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1218 } else { 1219 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 1220 ieee80211_send_nullfunc(local, sdata, 1); 1221 1222 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && 1223 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) 1224 return; 1225 1226 conf->flags |= IEEE80211_CONF_PS; 1227 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1228 } 1229 } 1230 1231 static void ieee80211_change_ps(struct ieee80211_local *local) 1232 { 1233 struct ieee80211_conf *conf = &local->hw.conf; 1234 1235 if (local->ps_sdata) { 1236 ieee80211_enable_ps(local, local->ps_sdata); 1237 } else if (conf->flags & IEEE80211_CONF_PS) { 1238 conf->flags &= ~IEEE80211_CONF_PS; 1239 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1240 del_timer_sync(&local->dynamic_ps_timer); 1241 cancel_work_sync(&local->dynamic_ps_enable_work); 1242 } 1243 } 1244 1245 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1246 { 1247 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1248 struct sta_info *sta = NULL; 1249 bool authorized = false; 1250 1251 if (!mgd->powersave) 1252 return false; 1253 1254 if (mgd->broken_ap) 1255 return false; 1256 1257 if (!mgd->associated) 1258 return false; 1259 1260 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1261 return false; 1262 1263 if (!mgd->have_beacon) 1264 return false; 1265 1266 rcu_read_lock(); 1267 sta = sta_info_get(sdata, mgd->bssid); 1268 if (sta) 1269 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1270 rcu_read_unlock(); 1271 1272 return authorized; 1273 } 1274 1275 /* need to hold RTNL or interface lock */ 1276 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) 1277 { 1278 struct ieee80211_sub_if_data *sdata, *found = NULL; 1279 int count = 0; 1280 int timeout; 1281 1282 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { 1283 local->ps_sdata = NULL; 1284 return; 1285 } 1286 1287 list_for_each_entry(sdata, &local->interfaces, list) { 1288 if (!ieee80211_sdata_running(sdata)) 1289 continue; 1290 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1291 /* If an AP vif is found, then disable PS 1292 * by setting the count to zero thereby setting 1293 * ps_sdata to NULL. 1294 */ 1295 count = 0; 1296 break; 1297 } 1298 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1299 continue; 1300 found = sdata; 1301 count++; 1302 } 1303 1304 if (count == 1 && ieee80211_powersave_allowed(found)) { 1305 s32 beaconint_us; 1306 1307 if (latency < 0) 1308 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); 1309 1310 beaconint_us = ieee80211_tu_to_usec( 1311 found->vif.bss_conf.beacon_int); 1312 1313 timeout = local->dynamic_ps_forced_timeout; 1314 if (timeout < 0) { 1315 /* 1316 * Go to full PSM if the user configures a very low 1317 * latency requirement. 1318 * The 2000 second value is there for compatibility 1319 * until the PM_QOS_NETWORK_LATENCY is configured 1320 * with real values. 1321 */ 1322 if (latency > (1900 * USEC_PER_MSEC) && 1323 latency != (2000 * USEC_PER_SEC)) 1324 timeout = 0; 1325 else 1326 timeout = 100; 1327 } 1328 local->hw.conf.dynamic_ps_timeout = timeout; 1329 1330 if (beaconint_us > latency) { 1331 local->ps_sdata = NULL; 1332 } else { 1333 int maxslp = 1; 1334 u8 dtimper = found->u.mgd.dtim_period; 1335 1336 /* If the TIM IE is invalid, pretend the value is 1 */ 1337 if (!dtimper) 1338 dtimper = 1; 1339 else if (dtimper > 1) 1340 maxslp = min_t(int, dtimper, 1341 latency / beaconint_us); 1342 1343 local->hw.conf.max_sleep_period = maxslp; 1344 local->hw.conf.ps_dtim_period = dtimper; 1345 local->ps_sdata = found; 1346 } 1347 } else { 1348 local->ps_sdata = NULL; 1349 } 1350 1351 ieee80211_change_ps(local); 1352 } 1353 1354 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1355 { 1356 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1357 1358 if (sdata->vif.bss_conf.ps != ps_allowed) { 1359 sdata->vif.bss_conf.ps = ps_allowed; 1360 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1361 } 1362 } 1363 1364 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1365 { 1366 struct ieee80211_local *local = 1367 container_of(work, struct ieee80211_local, 1368 dynamic_ps_disable_work); 1369 1370 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1371 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1372 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1373 } 1374 1375 ieee80211_wake_queues_by_reason(&local->hw, 1376 IEEE80211_MAX_QUEUE_MAP, 1377 IEEE80211_QUEUE_STOP_REASON_PS); 1378 } 1379 1380 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1381 { 1382 struct ieee80211_local *local = 1383 container_of(work, struct ieee80211_local, 1384 dynamic_ps_enable_work); 1385 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1386 struct ieee80211_if_managed *ifmgd; 1387 unsigned long flags; 1388 int q; 1389 1390 /* can only happen when PS was just disabled anyway */ 1391 if (!sdata) 1392 return; 1393 1394 ifmgd = &sdata->u.mgd; 1395 1396 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1397 return; 1398 1399 if (local->hw.conf.dynamic_ps_timeout > 0) { 1400 /* don't enter PS if TX frames are pending */ 1401 if (drv_tx_frames_pending(local)) { 1402 mod_timer(&local->dynamic_ps_timer, jiffies + 1403 msecs_to_jiffies( 1404 local->hw.conf.dynamic_ps_timeout)); 1405 return; 1406 } 1407 1408 /* 1409 * transmission can be stopped by others which leads to 1410 * dynamic_ps_timer expiry. Postpone the ps timer if it 1411 * is not the actual idle state. 1412 */ 1413 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1414 for (q = 0; q < local->hw.queues; q++) { 1415 if (local->queue_stop_reasons[q]) { 1416 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1417 flags); 1418 mod_timer(&local->dynamic_ps_timer, jiffies + 1419 msecs_to_jiffies( 1420 local->hw.conf.dynamic_ps_timeout)); 1421 return; 1422 } 1423 } 1424 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1425 } 1426 1427 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && 1428 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1429 if (drv_tx_frames_pending(local)) { 1430 mod_timer(&local->dynamic_ps_timer, jiffies + 1431 msecs_to_jiffies( 1432 local->hw.conf.dynamic_ps_timeout)); 1433 } else { 1434 ieee80211_send_nullfunc(local, sdata, 1); 1435 /* Flush to get the tx status of nullfunc frame */ 1436 ieee80211_flush_queues(local, sdata); 1437 } 1438 } 1439 1440 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && 1441 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || 1442 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1443 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1444 local->hw.conf.flags |= IEEE80211_CONF_PS; 1445 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1446 } 1447 } 1448 1449 void ieee80211_dynamic_ps_timer(unsigned long data) 1450 { 1451 struct ieee80211_local *local = (void *) data; 1452 1453 if (local->quiescing || local->suspended) 1454 return; 1455 1456 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1457 } 1458 1459 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1460 { 1461 struct delayed_work *delayed_work = 1462 container_of(work, struct delayed_work, work); 1463 struct ieee80211_sub_if_data *sdata = 1464 container_of(delayed_work, struct ieee80211_sub_if_data, 1465 dfs_cac_timer_work); 1466 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1467 1468 mutex_lock(&sdata->local->mtx); 1469 if (sdata->wdev.cac_started) { 1470 ieee80211_vif_release_channel(sdata); 1471 cfg80211_cac_event(sdata->dev, &chandef, 1472 NL80211_RADAR_CAC_FINISHED, 1473 GFP_KERNEL); 1474 } 1475 mutex_unlock(&sdata->local->mtx); 1476 } 1477 1478 /* MLME */ 1479 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1480 struct ieee80211_sub_if_data *sdata, 1481 const u8 *wmm_param, size_t wmm_param_len) 1482 { 1483 struct ieee80211_tx_queue_params params; 1484 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1485 size_t left; 1486 int count; 1487 const u8 *pos; 1488 u8 uapsd_queues = 0; 1489 1490 if (!local->ops->conf_tx) 1491 return false; 1492 1493 if (local->hw.queues < IEEE80211_NUM_ACS) 1494 return false; 1495 1496 if (!wmm_param) 1497 return false; 1498 1499 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1500 return false; 1501 1502 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1503 uapsd_queues = ifmgd->uapsd_queues; 1504 1505 count = wmm_param[6] & 0x0f; 1506 if (count == ifmgd->wmm_last_param_set) 1507 return false; 1508 ifmgd->wmm_last_param_set = count; 1509 1510 pos = wmm_param + 8; 1511 left = wmm_param_len - 8; 1512 1513 memset(¶ms, 0, sizeof(params)); 1514 1515 sdata->wmm_acm = 0; 1516 for (; left >= 4; left -= 4, pos += 4) { 1517 int aci = (pos[0] >> 5) & 0x03; 1518 int acm = (pos[0] >> 4) & 0x01; 1519 bool uapsd = false; 1520 int queue; 1521 1522 switch (aci) { 1523 case 1: /* AC_BK */ 1524 queue = 3; 1525 if (acm) 1526 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1527 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1528 uapsd = true; 1529 break; 1530 case 2: /* AC_VI */ 1531 queue = 1; 1532 if (acm) 1533 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1534 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1535 uapsd = true; 1536 break; 1537 case 3: /* AC_VO */ 1538 queue = 0; 1539 if (acm) 1540 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1541 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1542 uapsd = true; 1543 break; 1544 case 0: /* AC_BE */ 1545 default: 1546 queue = 2; 1547 if (acm) 1548 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1549 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1550 uapsd = true; 1551 break; 1552 } 1553 1554 params.aifs = pos[0] & 0x0f; 1555 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1556 params.cw_min = ecw2cw(pos[1] & 0x0f); 1557 params.txop = get_unaligned_le16(pos + 2); 1558 params.acm = acm; 1559 params.uapsd = uapsd; 1560 1561 mlme_dbg(sdata, 1562 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n", 1563 queue, aci, acm, 1564 params.aifs, params.cw_min, params.cw_max, 1565 params.txop, params.uapsd); 1566 sdata->tx_conf[queue] = params; 1567 if (drv_conf_tx(local, sdata, queue, ¶ms)) 1568 sdata_err(sdata, 1569 "failed to set TX queue parameters for queue %d\n", 1570 queue); 1571 } 1572 1573 /* enable WMM or activate new settings */ 1574 sdata->vif.bss_conf.qos = true; 1575 return true; 1576 } 1577 1578 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1579 { 1580 lockdep_assert_held(&sdata->local->mtx); 1581 1582 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1583 ieee80211_run_deferred_scan(sdata->local); 1584 } 1585 1586 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1587 { 1588 mutex_lock(&sdata->local->mtx); 1589 __ieee80211_stop_poll(sdata); 1590 mutex_unlock(&sdata->local->mtx); 1591 } 1592 1593 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1594 u16 capab, bool erp_valid, u8 erp) 1595 { 1596 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1597 u32 changed = 0; 1598 bool use_protection; 1599 bool use_short_preamble; 1600 bool use_short_slot; 1601 1602 if (erp_valid) { 1603 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1604 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1605 } else { 1606 use_protection = false; 1607 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1608 } 1609 1610 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1611 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) 1612 use_short_slot = true; 1613 1614 if (use_protection != bss_conf->use_cts_prot) { 1615 bss_conf->use_cts_prot = use_protection; 1616 changed |= BSS_CHANGED_ERP_CTS_PROT; 1617 } 1618 1619 if (use_short_preamble != bss_conf->use_short_preamble) { 1620 bss_conf->use_short_preamble = use_short_preamble; 1621 changed |= BSS_CHANGED_ERP_PREAMBLE; 1622 } 1623 1624 if (use_short_slot != bss_conf->use_short_slot) { 1625 bss_conf->use_short_slot = use_short_slot; 1626 changed |= BSS_CHANGED_ERP_SLOT; 1627 } 1628 1629 return changed; 1630 } 1631 1632 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1633 struct cfg80211_bss *cbss, 1634 u32 bss_info_changed) 1635 { 1636 struct ieee80211_bss *bss = (void *)cbss->priv; 1637 struct ieee80211_local *local = sdata->local; 1638 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1639 1640 bss_info_changed |= BSS_CHANGED_ASSOC; 1641 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1642 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1643 1644 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1645 beacon_loss_count * bss_conf->beacon_int)); 1646 1647 sdata->u.mgd.associated = cbss; 1648 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1649 1650 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1651 1652 if (sdata->vif.p2p) { 1653 const struct cfg80211_bss_ies *ies; 1654 1655 rcu_read_lock(); 1656 ies = rcu_dereference(cbss->ies); 1657 if (ies) { 1658 int ret; 1659 1660 ret = cfg80211_get_p2p_attr( 1661 ies->data, ies->len, 1662 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1663 (u8 *) &bss_conf->p2p_noa_attr, 1664 sizeof(bss_conf->p2p_noa_attr)); 1665 if (ret >= 2) { 1666 sdata->u.mgd.p2p_noa_index = 1667 bss_conf->p2p_noa_attr.index; 1668 bss_info_changed |= BSS_CHANGED_P2P_PS; 1669 } 1670 } 1671 rcu_read_unlock(); 1672 } 1673 1674 /* just to be sure */ 1675 ieee80211_stop_poll(sdata); 1676 1677 ieee80211_led_assoc(local, 1); 1678 1679 if (sdata->u.mgd.have_beacon) { 1680 /* 1681 * If the AP is buggy we may get here with no DTIM period 1682 * known, so assume it's 1 which is the only safe assumption 1683 * in that case, although if the TIM IE is broken powersave 1684 * probably just won't work at all. 1685 */ 1686 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1687 bss_conf->beacon_rate = bss->beacon_rate; 1688 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1689 } else { 1690 bss_conf->beacon_rate = NULL; 1691 bss_conf->dtim_period = 0; 1692 } 1693 1694 bss_conf->assoc = 1; 1695 1696 /* Tell the driver to monitor connection quality (if supported) */ 1697 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1698 bss_conf->cqm_rssi_thold) 1699 bss_info_changed |= BSS_CHANGED_CQM; 1700 1701 /* Enable ARP filtering */ 1702 if (bss_conf->arp_addr_cnt) 1703 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1704 1705 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1706 1707 mutex_lock(&local->iflist_mtx); 1708 ieee80211_recalc_ps(local, -1); 1709 mutex_unlock(&local->iflist_mtx); 1710 1711 ieee80211_recalc_smps(sdata); 1712 ieee80211_recalc_ps_vif(sdata); 1713 1714 netif_carrier_on(sdata->dev); 1715 } 1716 1717 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1718 u16 stype, u16 reason, bool tx, 1719 u8 *frame_buf) 1720 { 1721 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1722 struct ieee80211_local *local = sdata->local; 1723 u32 changed = 0; 1724 1725 sdata_assert_lock(sdata); 1726 1727 if (WARN_ON_ONCE(tx && !frame_buf)) 1728 return; 1729 1730 if (WARN_ON(!ifmgd->associated)) 1731 return; 1732 1733 ieee80211_stop_poll(sdata); 1734 1735 ifmgd->associated = NULL; 1736 netif_carrier_off(sdata->dev); 1737 1738 /* 1739 * if we want to get out of ps before disassoc (why?) we have 1740 * to do it before sending disassoc, as otherwise the null-packet 1741 * won't be valid. 1742 */ 1743 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1744 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1745 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1746 } 1747 local->ps_sdata = NULL; 1748 1749 /* disable per-vif ps */ 1750 ieee80211_recalc_ps_vif(sdata); 1751 1752 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */ 1753 if (tx) 1754 ieee80211_flush_queues(local, sdata); 1755 1756 /* deauthenticate/disassociate now */ 1757 if (tx || frame_buf) 1758 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 1759 reason, tx, frame_buf); 1760 1761 /* flush out frame */ 1762 if (tx) 1763 ieee80211_flush_queues(local, sdata); 1764 1765 /* clear bssid only after building the needed mgmt frames */ 1766 memset(ifmgd->bssid, 0, ETH_ALEN); 1767 1768 /* remove AP and TDLS peers */ 1769 sta_info_flush(sdata); 1770 1771 /* finally reset all BSS / config parameters */ 1772 changed |= ieee80211_reset_erp_info(sdata); 1773 1774 ieee80211_led_assoc(local, 0); 1775 changed |= BSS_CHANGED_ASSOC; 1776 sdata->vif.bss_conf.assoc = false; 1777 1778 ifmgd->p2p_noa_index = -1; 1779 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 1780 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 1781 1782 /* on the next assoc, re-program HT/VHT parameters */ 1783 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 1784 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 1785 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 1786 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 1787 1788 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1789 1790 del_timer_sync(&local->dynamic_ps_timer); 1791 cancel_work_sync(&local->dynamic_ps_enable_work); 1792 1793 /* Disable ARP filtering */ 1794 if (sdata->vif.bss_conf.arp_addr_cnt) 1795 changed |= BSS_CHANGED_ARP_FILTER; 1796 1797 sdata->vif.bss_conf.qos = false; 1798 changed |= BSS_CHANGED_QOS; 1799 1800 /* The BSSID (not really interesting) and HT changed */ 1801 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 1802 ieee80211_bss_info_change_notify(sdata, changed); 1803 1804 /* disassociated - set to defaults now */ 1805 ieee80211_set_wmm_default(sdata, false); 1806 1807 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 1808 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 1809 del_timer_sync(&sdata->u.mgd.timer); 1810 del_timer_sync(&sdata->u.mgd.chswitch_timer); 1811 1812 sdata->vif.bss_conf.dtim_period = 0; 1813 sdata->vif.bss_conf.beacon_rate = NULL; 1814 1815 ifmgd->have_beacon = false; 1816 1817 ifmgd->flags = 0; 1818 mutex_lock(&local->mtx); 1819 ieee80211_vif_release_channel(sdata); 1820 mutex_unlock(&local->mtx); 1821 1822 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1823 } 1824 1825 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 1826 struct ieee80211_hdr *hdr) 1827 { 1828 /* 1829 * We can postpone the mgd.timer whenever receiving unicast frames 1830 * from AP because we know that the connection is working both ways 1831 * at that time. But multicast frames (and hence also beacons) must 1832 * be ignored here, because we need to trigger the timer during 1833 * data idle periods for sending the periodic probe request to the 1834 * AP we're connected to. 1835 */ 1836 if (is_multicast_ether_addr(hdr->addr1)) 1837 return; 1838 1839 ieee80211_sta_reset_conn_monitor(sdata); 1840 } 1841 1842 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 1843 { 1844 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1845 struct ieee80211_local *local = sdata->local; 1846 1847 mutex_lock(&local->mtx); 1848 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 1849 goto out; 1850 1851 __ieee80211_stop_poll(sdata); 1852 1853 mutex_lock(&local->iflist_mtx); 1854 ieee80211_recalc_ps(local, -1); 1855 mutex_unlock(&local->iflist_mtx); 1856 1857 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 1858 goto out; 1859 1860 /* 1861 * We've received a probe response, but are not sure whether 1862 * we have or will be receiving any beacons or data, so let's 1863 * schedule the timers again, just in case. 1864 */ 1865 ieee80211_sta_reset_beacon_monitor(sdata); 1866 1867 mod_timer(&ifmgd->conn_mon_timer, 1868 round_jiffies_up(jiffies + 1869 IEEE80211_CONNECTION_IDLE_TIME)); 1870 out: 1871 mutex_unlock(&local->mtx); 1872 } 1873 1874 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 1875 struct ieee80211_hdr *hdr, bool ack) 1876 { 1877 if (!ieee80211_is_data(hdr->frame_control)) 1878 return; 1879 1880 if (ieee80211_is_nullfunc(hdr->frame_control) && 1881 sdata->u.mgd.probe_send_count > 0) { 1882 if (ack) 1883 ieee80211_sta_reset_conn_monitor(sdata); 1884 else 1885 sdata->u.mgd.nullfunc_failed = true; 1886 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 1887 return; 1888 } 1889 1890 if (ack) 1891 ieee80211_sta_reset_conn_monitor(sdata); 1892 } 1893 1894 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 1895 { 1896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1897 const u8 *ssid; 1898 u8 *dst = ifmgd->associated->bssid; 1899 u8 unicast_limit = max(1, max_probe_tries - 3); 1900 1901 /* 1902 * Try sending broadcast probe requests for the last three 1903 * probe requests after the first ones failed since some 1904 * buggy APs only support broadcast probe requests. 1905 */ 1906 if (ifmgd->probe_send_count >= unicast_limit) 1907 dst = NULL; 1908 1909 /* 1910 * When the hardware reports an accurate Tx ACK status, it's 1911 * better to send a nullfunc frame instead of a probe request, 1912 * as it will kick us off the AP quickly if we aren't associated 1913 * anymore. The timeout will be reset if the frame is ACKed by 1914 * the AP. 1915 */ 1916 ifmgd->probe_send_count++; 1917 1918 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 1919 ifmgd->nullfunc_failed = false; 1920 ieee80211_send_nullfunc(sdata->local, sdata, 0); 1921 } else { 1922 int ssid_len; 1923 1924 rcu_read_lock(); 1925 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 1926 if (WARN_ON_ONCE(ssid == NULL)) 1927 ssid_len = 0; 1928 else 1929 ssid_len = ssid[1]; 1930 1931 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL, 1932 0, (u32) -1, true, 0, 1933 ifmgd->associated->channel, false); 1934 rcu_read_unlock(); 1935 } 1936 1937 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 1938 run_again(sdata, ifmgd->probe_timeout); 1939 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 1940 ieee80211_flush_queues(sdata->local, sdata); 1941 } 1942 1943 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 1944 bool beacon) 1945 { 1946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1947 bool already = false; 1948 1949 if (!ieee80211_sdata_running(sdata)) 1950 return; 1951 1952 sdata_lock(sdata); 1953 1954 if (!ifmgd->associated) 1955 goto out; 1956 1957 mutex_lock(&sdata->local->mtx); 1958 1959 if (sdata->local->tmp_channel || sdata->local->scanning) { 1960 mutex_unlock(&sdata->local->mtx); 1961 goto out; 1962 } 1963 1964 if (beacon) { 1965 mlme_dbg_ratelimited(sdata, 1966 "detected beacon loss from AP (missed %d beacons) - probing\n", 1967 beacon_loss_count); 1968 1969 ieee80211_cqm_rssi_notify(&sdata->vif, 1970 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, 1971 GFP_KERNEL); 1972 } 1973 1974 /* 1975 * The driver/our work has already reported this event or the 1976 * connection monitoring has kicked in and we have already sent 1977 * a probe request. Or maybe the AP died and the driver keeps 1978 * reporting until we disassociate... 1979 * 1980 * In either case we have to ignore the current call to this 1981 * function (except for setting the correct probe reason bit) 1982 * because otherwise we would reset the timer every time and 1983 * never check whether we received a probe response! 1984 */ 1985 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1986 already = true; 1987 1988 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 1989 1990 mutex_unlock(&sdata->local->mtx); 1991 1992 if (already) 1993 goto out; 1994 1995 mutex_lock(&sdata->local->iflist_mtx); 1996 ieee80211_recalc_ps(sdata->local, -1); 1997 mutex_unlock(&sdata->local->iflist_mtx); 1998 1999 ifmgd->probe_send_count = 0; 2000 ieee80211_mgd_probe_ap_send(sdata); 2001 out: 2002 sdata_unlock(sdata); 2003 } 2004 2005 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2006 struct ieee80211_vif *vif) 2007 { 2008 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2010 struct cfg80211_bss *cbss; 2011 struct sk_buff *skb; 2012 const u8 *ssid; 2013 int ssid_len; 2014 2015 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2016 return NULL; 2017 2018 sdata_assert_lock(sdata); 2019 2020 if (ifmgd->associated) 2021 cbss = ifmgd->associated; 2022 else if (ifmgd->auth_data) 2023 cbss = ifmgd->auth_data->bss; 2024 else if (ifmgd->assoc_data) 2025 cbss = ifmgd->assoc_data->bss; 2026 else 2027 return NULL; 2028 2029 rcu_read_lock(); 2030 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2031 if (WARN_ON_ONCE(ssid == NULL)) 2032 ssid_len = 0; 2033 else 2034 ssid_len = ssid[1]; 2035 2036 skb = ieee80211_build_probe_req(sdata, cbss->bssid, 2037 (u32) -1, cbss->channel, 2038 ssid + 2, ssid_len, 2039 NULL, 0, true); 2040 rcu_read_unlock(); 2041 2042 return skb; 2043 } 2044 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2045 2046 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2047 { 2048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2049 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2050 2051 sdata_lock(sdata); 2052 if (!ifmgd->associated) { 2053 sdata_unlock(sdata); 2054 return; 2055 } 2056 2057 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2058 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2059 true, frame_buf); 2060 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; 2061 sdata->vif.csa_active = false; 2062 ieee80211_wake_queues_by_reason(&sdata->local->hw, 2063 IEEE80211_MAX_QUEUE_MAP, 2064 IEEE80211_QUEUE_STOP_REASON_CSA); 2065 2066 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 2067 IEEE80211_DEAUTH_FRAME_LEN); 2068 sdata_unlock(sdata); 2069 } 2070 2071 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2072 { 2073 struct ieee80211_sub_if_data *sdata = 2074 container_of(work, struct ieee80211_sub_if_data, 2075 u.mgd.beacon_connection_loss_work); 2076 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2077 struct sta_info *sta; 2078 2079 if (ifmgd->associated) { 2080 rcu_read_lock(); 2081 sta = sta_info_get(sdata, ifmgd->bssid); 2082 if (sta) 2083 sta->beacon_loss_count++; 2084 rcu_read_unlock(); 2085 } 2086 2087 if (ifmgd->connection_loss) { 2088 sdata_info(sdata, "Connection to AP %pM lost\n", 2089 ifmgd->bssid); 2090 __ieee80211_disconnect(sdata); 2091 } else { 2092 ieee80211_mgd_probe_ap(sdata, true); 2093 } 2094 } 2095 2096 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2097 { 2098 struct ieee80211_sub_if_data *sdata = 2099 container_of(work, struct ieee80211_sub_if_data, 2100 u.mgd.csa_connection_drop_work); 2101 2102 __ieee80211_disconnect(sdata); 2103 } 2104 2105 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2106 { 2107 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2108 struct ieee80211_hw *hw = &sdata->local->hw; 2109 2110 trace_api_beacon_loss(sdata); 2111 2112 sdata->u.mgd.connection_loss = false; 2113 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2114 } 2115 EXPORT_SYMBOL(ieee80211_beacon_loss); 2116 2117 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2118 { 2119 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2120 struct ieee80211_hw *hw = &sdata->local->hw; 2121 2122 trace_api_connection_loss(sdata); 2123 2124 sdata->u.mgd.connection_loss = true; 2125 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2126 } 2127 EXPORT_SYMBOL(ieee80211_connection_loss); 2128 2129 2130 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2131 bool assoc) 2132 { 2133 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2134 2135 sdata_assert_lock(sdata); 2136 2137 if (!assoc) { 2138 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2139 2140 memset(sdata->u.mgd.bssid, 0, ETH_ALEN); 2141 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2142 sdata->u.mgd.flags = 0; 2143 mutex_lock(&sdata->local->mtx); 2144 ieee80211_vif_release_channel(sdata); 2145 mutex_unlock(&sdata->local->mtx); 2146 } 2147 2148 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2149 kfree(auth_data); 2150 sdata->u.mgd.auth_data = NULL; 2151 } 2152 2153 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2154 struct ieee80211_mgmt *mgmt, size_t len) 2155 { 2156 struct ieee80211_local *local = sdata->local; 2157 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2158 u8 *pos; 2159 struct ieee802_11_elems elems; 2160 u32 tx_flags = 0; 2161 2162 pos = mgmt->u.auth.variable; 2163 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2164 if (!elems.challenge) 2165 return; 2166 auth_data->expected_transaction = 4; 2167 drv_mgd_prepare_tx(sdata->local, sdata); 2168 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 2169 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2170 IEEE80211_TX_INTFL_MLME_CONN_TX; 2171 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2172 elems.challenge - 2, elems.challenge_len + 2, 2173 auth_data->bss->bssid, auth_data->bss->bssid, 2174 auth_data->key, auth_data->key_len, 2175 auth_data->key_idx, tx_flags); 2176 } 2177 2178 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2179 struct ieee80211_mgmt *mgmt, size_t len) 2180 { 2181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2182 u8 bssid[ETH_ALEN]; 2183 u16 auth_alg, auth_transaction, status_code; 2184 struct sta_info *sta; 2185 2186 sdata_assert_lock(sdata); 2187 2188 if (len < 24 + 6) 2189 return; 2190 2191 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2192 return; 2193 2194 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2195 2196 if (!ether_addr_equal(bssid, mgmt->bssid)) 2197 return; 2198 2199 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2200 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2201 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2202 2203 if (auth_alg != ifmgd->auth_data->algorithm || 2204 auth_transaction != ifmgd->auth_data->expected_transaction) { 2205 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2206 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2207 auth_transaction, 2208 ifmgd->auth_data->expected_transaction); 2209 return; 2210 } 2211 2212 if (status_code != WLAN_STATUS_SUCCESS) { 2213 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2214 mgmt->sa, status_code); 2215 ieee80211_destroy_auth_data(sdata, false); 2216 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2217 return; 2218 } 2219 2220 switch (ifmgd->auth_data->algorithm) { 2221 case WLAN_AUTH_OPEN: 2222 case WLAN_AUTH_LEAP: 2223 case WLAN_AUTH_FT: 2224 case WLAN_AUTH_SAE: 2225 break; 2226 case WLAN_AUTH_SHARED_KEY: 2227 if (ifmgd->auth_data->expected_transaction != 4) { 2228 ieee80211_auth_challenge(sdata, mgmt, len); 2229 /* need another frame */ 2230 return; 2231 } 2232 break; 2233 default: 2234 WARN_ONCE(1, "invalid auth alg %d", 2235 ifmgd->auth_data->algorithm); 2236 return; 2237 } 2238 2239 sdata_info(sdata, "authenticated\n"); 2240 ifmgd->auth_data->done = true; 2241 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2242 ifmgd->auth_data->timeout_started = true; 2243 run_again(sdata, ifmgd->auth_data->timeout); 2244 2245 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2246 ifmgd->auth_data->expected_transaction != 2) { 2247 /* 2248 * Report auth frame to user space for processing since another 2249 * round of Authentication frames is still needed. 2250 */ 2251 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2252 return; 2253 } 2254 2255 /* move station state to auth */ 2256 mutex_lock(&sdata->local->sta_mtx); 2257 sta = sta_info_get(sdata, bssid); 2258 if (!sta) { 2259 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2260 goto out_err; 2261 } 2262 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2263 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2264 goto out_err; 2265 } 2266 mutex_unlock(&sdata->local->sta_mtx); 2267 2268 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2269 return; 2270 out_err: 2271 mutex_unlock(&sdata->local->sta_mtx); 2272 /* ignore frame -- wait for timeout */ 2273 } 2274 2275 #define case_WLAN(type) \ 2276 case WLAN_REASON_##type: return #type 2277 2278 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2279 { 2280 switch (reason_code) { 2281 case_WLAN(UNSPECIFIED); 2282 case_WLAN(PREV_AUTH_NOT_VALID); 2283 case_WLAN(DEAUTH_LEAVING); 2284 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2285 case_WLAN(DISASSOC_AP_BUSY); 2286 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2287 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2288 case_WLAN(DISASSOC_STA_HAS_LEFT); 2289 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2290 case_WLAN(DISASSOC_BAD_POWER); 2291 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2292 case_WLAN(INVALID_IE); 2293 case_WLAN(MIC_FAILURE); 2294 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2295 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2296 case_WLAN(IE_DIFFERENT); 2297 case_WLAN(INVALID_GROUP_CIPHER); 2298 case_WLAN(INVALID_PAIRWISE_CIPHER); 2299 case_WLAN(INVALID_AKMP); 2300 case_WLAN(UNSUPP_RSN_VERSION); 2301 case_WLAN(INVALID_RSN_IE_CAP); 2302 case_WLAN(IEEE8021X_FAILED); 2303 case_WLAN(CIPHER_SUITE_REJECTED); 2304 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2305 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2306 case_WLAN(DISASSOC_LOW_ACK); 2307 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2308 case_WLAN(QSTA_LEAVE_QBSS); 2309 case_WLAN(QSTA_NOT_USE); 2310 case_WLAN(QSTA_REQUIRE_SETUP); 2311 case_WLAN(QSTA_TIMEOUT); 2312 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2313 case_WLAN(MESH_PEER_CANCELED); 2314 case_WLAN(MESH_MAX_PEERS); 2315 case_WLAN(MESH_CONFIG); 2316 case_WLAN(MESH_CLOSE); 2317 case_WLAN(MESH_MAX_RETRIES); 2318 case_WLAN(MESH_CONFIRM_TIMEOUT); 2319 case_WLAN(MESH_INVALID_GTK); 2320 case_WLAN(MESH_INCONSISTENT_PARAM); 2321 case_WLAN(MESH_INVALID_SECURITY); 2322 case_WLAN(MESH_PATH_ERROR); 2323 case_WLAN(MESH_PATH_NOFORWARD); 2324 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2325 case_WLAN(MAC_EXISTS_IN_MBSS); 2326 case_WLAN(MESH_CHAN_REGULATORY); 2327 case_WLAN(MESH_CHAN); 2328 default: return "<unknown>"; 2329 } 2330 } 2331 2332 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2333 struct ieee80211_mgmt *mgmt, size_t len) 2334 { 2335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2336 const u8 *bssid = NULL; 2337 u16 reason_code; 2338 2339 sdata_assert_lock(sdata); 2340 2341 if (len < 24 + 2) 2342 return; 2343 2344 if (!ifmgd->associated || 2345 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2346 return; 2347 2348 bssid = ifmgd->associated->bssid; 2349 2350 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2351 2352 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2353 bssid, reason_code, ieee80211_get_reason_code_string(reason_code)); 2354 2355 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2356 2357 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2358 } 2359 2360 2361 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2362 struct ieee80211_mgmt *mgmt, size_t len) 2363 { 2364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2365 u16 reason_code; 2366 2367 sdata_assert_lock(sdata); 2368 2369 if (len < 24 + 2) 2370 return; 2371 2372 if (!ifmgd->associated || 2373 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2374 return; 2375 2376 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2377 2378 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", 2379 mgmt->sa, reason_code); 2380 2381 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2382 2383 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2384 } 2385 2386 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2387 u8 *supp_rates, unsigned int supp_rates_len, 2388 u32 *rates, u32 *basic_rates, 2389 bool *have_higher_than_11mbit, 2390 int *min_rate, int *min_rate_index, 2391 int shift, u32 rate_flags) 2392 { 2393 int i, j; 2394 2395 for (i = 0; i < supp_rates_len; i++) { 2396 int rate = supp_rates[i] & 0x7f; 2397 bool is_basic = !!(supp_rates[i] & 0x80); 2398 2399 if ((rate * 5 * (1 << shift)) > 110) 2400 *have_higher_than_11mbit = true; 2401 2402 /* 2403 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 2404 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. 2405 * 2406 * Note: Even through the membership selector and the basic 2407 * rate flag share the same bit, they are not exactly 2408 * the same. 2409 */ 2410 if (!!(supp_rates[i] & 0x80) && 2411 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2412 continue; 2413 2414 for (j = 0; j < sband->n_bitrates; j++) { 2415 struct ieee80211_rate *br; 2416 int brate; 2417 2418 br = &sband->bitrates[j]; 2419 if ((rate_flags & br->flags) != rate_flags) 2420 continue; 2421 2422 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2423 if (brate == rate) { 2424 *rates |= BIT(j); 2425 if (is_basic) 2426 *basic_rates |= BIT(j); 2427 if ((rate * 5) < *min_rate) { 2428 *min_rate = rate * 5; 2429 *min_rate_index = j; 2430 } 2431 break; 2432 } 2433 } 2434 } 2435 } 2436 2437 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2438 bool assoc) 2439 { 2440 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2441 2442 sdata_assert_lock(sdata); 2443 2444 if (!assoc) { 2445 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2446 2447 memset(sdata->u.mgd.bssid, 0, ETH_ALEN); 2448 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2449 sdata->u.mgd.flags = 0; 2450 mutex_lock(&sdata->local->mtx); 2451 ieee80211_vif_release_channel(sdata); 2452 mutex_unlock(&sdata->local->mtx); 2453 } 2454 2455 kfree(assoc_data); 2456 sdata->u.mgd.assoc_data = NULL; 2457 } 2458 2459 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2460 struct cfg80211_bss *cbss, 2461 struct ieee80211_mgmt *mgmt, size_t len) 2462 { 2463 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2464 struct ieee80211_local *local = sdata->local; 2465 struct ieee80211_supported_band *sband; 2466 struct sta_info *sta; 2467 u8 *pos; 2468 u16 capab_info, aid; 2469 struct ieee802_11_elems elems; 2470 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2471 const struct cfg80211_bss_ies *bss_ies = NULL; 2472 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2473 u32 changed = 0; 2474 int err; 2475 bool ret; 2476 2477 /* AssocResp and ReassocResp have identical structure */ 2478 2479 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2480 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2481 2482 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2483 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2484 aid); 2485 aid &= ~(BIT(15) | BIT(14)); 2486 2487 ifmgd->broken_ap = false; 2488 2489 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2490 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2491 aid); 2492 aid = 0; 2493 ifmgd->broken_ap = true; 2494 } 2495 2496 pos = mgmt->u.assoc_resp.variable; 2497 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2498 2499 if (!elems.supp_rates) { 2500 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2501 return false; 2502 } 2503 2504 ifmgd->aid = aid; 2505 2506 /* 2507 * Some APs are erroneously not including some information in their 2508 * (re)association response frames. Try to recover by using the data 2509 * from the beacon or probe response. This seems to afflict mobile 2510 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2511 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2512 */ 2513 if ((assoc_data->wmm && !elems.wmm_param) || 2514 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2515 (!elems.ht_cap_elem || !elems.ht_operation)) || 2516 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2517 (!elems.vht_cap_elem || !elems.vht_operation))) { 2518 const struct cfg80211_bss_ies *ies; 2519 struct ieee802_11_elems bss_elems; 2520 2521 rcu_read_lock(); 2522 ies = rcu_dereference(cbss->ies); 2523 if (ies) 2524 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2525 GFP_ATOMIC); 2526 rcu_read_unlock(); 2527 if (!bss_ies) 2528 return false; 2529 2530 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2531 false, &bss_elems); 2532 if (assoc_data->wmm && 2533 !elems.wmm_param && bss_elems.wmm_param) { 2534 elems.wmm_param = bss_elems.wmm_param; 2535 sdata_info(sdata, 2536 "AP bug: WMM param missing from AssocResp\n"); 2537 } 2538 2539 /* 2540 * Also check if we requested HT/VHT, otherwise the AP doesn't 2541 * have to include the IEs in the (re)association response. 2542 */ 2543 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2544 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2545 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2546 sdata_info(sdata, 2547 "AP bug: HT capability missing from AssocResp\n"); 2548 } 2549 if (!elems.ht_operation && bss_elems.ht_operation && 2550 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2551 elems.ht_operation = bss_elems.ht_operation; 2552 sdata_info(sdata, 2553 "AP bug: HT operation missing from AssocResp\n"); 2554 } 2555 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2556 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2557 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2558 sdata_info(sdata, 2559 "AP bug: VHT capa missing from AssocResp\n"); 2560 } 2561 if (!elems.vht_operation && bss_elems.vht_operation && 2562 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2563 elems.vht_operation = bss_elems.vht_operation; 2564 sdata_info(sdata, 2565 "AP bug: VHT operation missing from AssocResp\n"); 2566 } 2567 } 2568 2569 /* 2570 * We previously checked these in the beacon/probe response, so 2571 * they should be present here. This is just a safety net. 2572 */ 2573 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2574 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2575 sdata_info(sdata, 2576 "HT AP is missing WMM params or HT capability/operation\n"); 2577 ret = false; 2578 goto out; 2579 } 2580 2581 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2582 (!elems.vht_cap_elem || !elems.vht_operation)) { 2583 sdata_info(sdata, 2584 "VHT AP is missing VHT capability/operation\n"); 2585 ret = false; 2586 goto out; 2587 } 2588 2589 mutex_lock(&sdata->local->sta_mtx); 2590 /* 2591 * station info was already allocated and inserted before 2592 * the association and should be available to us 2593 */ 2594 sta = sta_info_get(sdata, cbss->bssid); 2595 if (WARN_ON(!sta)) { 2596 mutex_unlock(&sdata->local->sta_mtx); 2597 ret = false; 2598 goto out; 2599 } 2600 2601 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; 2602 2603 /* Set up internal HT/VHT capabilities */ 2604 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 2605 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 2606 elems.ht_cap_elem, sta); 2607 2608 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 2609 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 2610 elems.vht_cap_elem, sta); 2611 2612 /* 2613 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 2614 * in their association response, so ignore that data for our own 2615 * configuration. If it changed since the last beacon, we'll get the 2616 * next beacon and update then. 2617 */ 2618 2619 /* 2620 * If an operating mode notification IE is present, override the 2621 * NSS calculation (that would be done in rate_control_rate_init()) 2622 * and use the # of streams from that element. 2623 */ 2624 if (elems.opmode_notif && 2625 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 2626 u8 nss; 2627 2628 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 2629 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 2630 nss += 1; 2631 sta->sta.rx_nss = nss; 2632 } 2633 2634 rate_control_rate_init(sta); 2635 2636 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) 2637 set_sta_flag(sta, WLAN_STA_MFP); 2638 2639 if (elems.wmm_param) 2640 set_sta_flag(sta, WLAN_STA_WME); 2641 2642 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 2643 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 2644 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 2645 if (err) { 2646 sdata_info(sdata, 2647 "failed to move station %pM to desired state\n", 2648 sta->sta.addr); 2649 WARN_ON(__sta_info_destroy(sta)); 2650 mutex_unlock(&sdata->local->sta_mtx); 2651 ret = false; 2652 goto out; 2653 } 2654 2655 mutex_unlock(&sdata->local->sta_mtx); 2656 2657 /* 2658 * Always handle WMM once after association regardless 2659 * of the first value the AP uses. Setting -1 here has 2660 * that effect because the AP values is an unsigned 2661 * 4-bit value. 2662 */ 2663 ifmgd->wmm_last_param_set = -1; 2664 2665 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param) 2666 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 2667 elems.wmm_param_len); 2668 else 2669 ieee80211_set_wmm_default(sdata, false); 2670 changed |= BSS_CHANGED_QOS; 2671 2672 /* set AID and assoc capability, 2673 * ieee80211_set_associated() will tell the driver */ 2674 bss_conf->aid = aid; 2675 bss_conf->assoc_capability = capab_info; 2676 ieee80211_set_associated(sdata, cbss, changed); 2677 2678 /* 2679 * If we're using 4-addr mode, let the AP know that we're 2680 * doing so, so that it can create the STA VLAN on its side 2681 */ 2682 if (ifmgd->use_4addr) 2683 ieee80211_send_4addr_nullfunc(local, sdata); 2684 2685 /* 2686 * Start timer to probe the connection to the AP now. 2687 * Also start the timer that will detect beacon loss. 2688 */ 2689 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 2690 ieee80211_sta_reset_beacon_monitor(sdata); 2691 2692 ret = true; 2693 out: 2694 kfree(bss_ies); 2695 return ret; 2696 } 2697 2698 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 2699 struct ieee80211_mgmt *mgmt, 2700 size_t len) 2701 { 2702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2703 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2704 u16 capab_info, status_code, aid; 2705 struct ieee802_11_elems elems; 2706 u8 *pos; 2707 bool reassoc; 2708 struct cfg80211_bss *bss; 2709 2710 sdata_assert_lock(sdata); 2711 2712 if (!assoc_data) 2713 return; 2714 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 2715 return; 2716 2717 /* 2718 * AssocResp and ReassocResp have identical structure, so process both 2719 * of them in this function. 2720 */ 2721 2722 if (len < 24 + 6) 2723 return; 2724 2725 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 2726 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2727 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 2728 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2729 2730 sdata_info(sdata, 2731 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 2732 reassoc ? "Rea" : "A", mgmt->sa, 2733 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 2734 2735 pos = mgmt->u.assoc_resp.variable; 2736 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2737 2738 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 2739 elems.timeout_int && 2740 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 2741 u32 tu, ms; 2742 tu = le32_to_cpu(elems.timeout_int->value); 2743 ms = tu * 1024 / 1000; 2744 sdata_info(sdata, 2745 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 2746 mgmt->sa, tu, ms); 2747 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 2748 assoc_data->timeout_started = true; 2749 if (ms > IEEE80211_ASSOC_TIMEOUT) 2750 run_again(sdata, assoc_data->timeout); 2751 return; 2752 } 2753 2754 bss = assoc_data->bss; 2755 2756 if (status_code != WLAN_STATUS_SUCCESS) { 2757 sdata_info(sdata, "%pM denied association (code=%d)\n", 2758 mgmt->sa, status_code); 2759 ieee80211_destroy_assoc_data(sdata, false); 2760 } else { 2761 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 2762 /* oops -- internal error -- send timeout for now */ 2763 ieee80211_destroy_assoc_data(sdata, false); 2764 cfg80211_assoc_timeout(sdata->dev, bss); 2765 return; 2766 } 2767 sdata_info(sdata, "associated\n"); 2768 2769 /* 2770 * destroy assoc_data afterwards, as otherwise an idle 2771 * recalc after assoc_data is NULL but before associated 2772 * is set can cause the interface to go idle 2773 */ 2774 ieee80211_destroy_assoc_data(sdata, true); 2775 } 2776 2777 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len); 2778 } 2779 2780 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 2781 struct ieee80211_mgmt *mgmt, size_t len, 2782 struct ieee80211_rx_status *rx_status, 2783 struct ieee802_11_elems *elems) 2784 { 2785 struct ieee80211_local *local = sdata->local; 2786 struct ieee80211_bss *bss; 2787 struct ieee80211_channel *channel; 2788 2789 sdata_assert_lock(sdata); 2790 2791 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 2792 if (!channel) 2793 return; 2794 2795 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 2796 channel); 2797 if (bss) { 2798 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 2799 ieee80211_rx_bss_put(local, bss); 2800 } 2801 } 2802 2803 2804 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 2805 struct sk_buff *skb) 2806 { 2807 struct ieee80211_mgmt *mgmt = (void *)skb->data; 2808 struct ieee80211_if_managed *ifmgd; 2809 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 2810 size_t baselen, len = skb->len; 2811 struct ieee802_11_elems elems; 2812 2813 ifmgd = &sdata->u.mgd; 2814 2815 sdata_assert_lock(sdata); 2816 2817 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 2818 return; /* ignore ProbeResp to foreign address */ 2819 2820 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 2821 if (baselen > len) 2822 return; 2823 2824 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 2825 false, &elems); 2826 2827 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 2828 2829 if (ifmgd->associated && 2830 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2831 ieee80211_reset_ap_probe(sdata); 2832 2833 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && 2834 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { 2835 /* got probe response, continue with auth */ 2836 sdata_info(sdata, "direct probe responded\n"); 2837 ifmgd->auth_data->tries = 0; 2838 ifmgd->auth_data->timeout = jiffies; 2839 ifmgd->auth_data->timeout_started = true; 2840 run_again(sdata, ifmgd->auth_data->timeout); 2841 } 2842 } 2843 2844 /* 2845 * This is the canonical list of information elements we care about, 2846 * the filter code also gives us all changes to the Microsoft OUI 2847 * (00:50:F2) vendor IE which is used for WMM which we need to track. 2848 * 2849 * We implement beacon filtering in software since that means we can 2850 * avoid processing the frame here and in cfg80211, and userspace 2851 * will not be able to tell whether the hardware supports it or not. 2852 * 2853 * XXX: This list needs to be dynamic -- userspace needs to be able to 2854 * add items it requires. It also needs to be able to tell us to 2855 * look out for other vendor IEs. 2856 */ 2857 static const u64 care_about_ies = 2858 (1ULL << WLAN_EID_COUNTRY) | 2859 (1ULL << WLAN_EID_ERP_INFO) | 2860 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 2861 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 2862 (1ULL << WLAN_EID_HT_CAPABILITY) | 2863 (1ULL << WLAN_EID_HT_OPERATION); 2864 2865 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 2866 struct ieee80211_mgmt *mgmt, size_t len, 2867 struct ieee80211_rx_status *rx_status) 2868 { 2869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2870 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2871 size_t baselen; 2872 struct ieee802_11_elems elems; 2873 struct ieee80211_local *local = sdata->local; 2874 struct ieee80211_chanctx_conf *chanctx_conf; 2875 struct ieee80211_channel *chan; 2876 struct sta_info *sta; 2877 u32 changed = 0; 2878 bool erp_valid; 2879 u8 erp_value = 0; 2880 u32 ncrc; 2881 u8 *bssid; 2882 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2883 2884 sdata_assert_lock(sdata); 2885 2886 /* Process beacon from the current BSS */ 2887 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 2888 if (baselen > len) 2889 return; 2890 2891 rcu_read_lock(); 2892 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 2893 if (!chanctx_conf) { 2894 rcu_read_unlock(); 2895 return; 2896 } 2897 2898 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 2899 rcu_read_unlock(); 2900 return; 2901 } 2902 chan = chanctx_conf->def.chan; 2903 rcu_read_unlock(); 2904 2905 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 2906 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2907 ieee802_11_parse_elems(mgmt->u.beacon.variable, 2908 len - baselen, false, &elems); 2909 2910 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 2911 if (elems.tim && !elems.parse_error) { 2912 const struct ieee80211_tim_ie *tim_ie = elems.tim; 2913 ifmgd->dtim_period = tim_ie->dtim_period; 2914 } 2915 ifmgd->have_beacon = true; 2916 ifmgd->assoc_data->need_beacon = false; 2917 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 2918 sdata->vif.bss_conf.sync_tsf = 2919 le64_to_cpu(mgmt->u.beacon.timestamp); 2920 sdata->vif.bss_conf.sync_device_ts = 2921 rx_status->device_timestamp; 2922 if (elems.tim) 2923 sdata->vif.bss_conf.sync_dtim_count = 2924 elems.tim->dtim_count; 2925 else 2926 sdata->vif.bss_conf.sync_dtim_count = 0; 2927 } 2928 /* continue assoc process */ 2929 ifmgd->assoc_data->timeout = jiffies; 2930 ifmgd->assoc_data->timeout_started = true; 2931 run_again(sdata, ifmgd->assoc_data->timeout); 2932 return; 2933 } 2934 2935 if (!ifmgd->associated || 2936 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2937 return; 2938 bssid = ifmgd->associated->bssid; 2939 2940 /* Track average RSSI from the Beacon frames of the current AP */ 2941 ifmgd->last_beacon_signal = rx_status->signal; 2942 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 2943 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 2944 ifmgd->ave_beacon_signal = rx_status->signal * 16; 2945 ifmgd->last_cqm_event_signal = 0; 2946 ifmgd->count_beacon_signal = 1; 2947 ifmgd->last_ave_beacon_signal = 0; 2948 } else { 2949 ifmgd->ave_beacon_signal = 2950 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + 2951 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * 2952 ifmgd->ave_beacon_signal) / 16; 2953 ifmgd->count_beacon_signal++; 2954 } 2955 2956 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 2957 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 2958 int sig = ifmgd->ave_beacon_signal; 2959 int last_sig = ifmgd->last_ave_beacon_signal; 2960 2961 /* 2962 * if signal crosses either of the boundaries, invoke callback 2963 * with appropriate parameters 2964 */ 2965 if (sig > ifmgd->rssi_max_thold && 2966 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 2967 ifmgd->last_ave_beacon_signal = sig; 2968 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH); 2969 } else if (sig < ifmgd->rssi_min_thold && 2970 (last_sig >= ifmgd->rssi_max_thold || 2971 last_sig == 0)) { 2972 ifmgd->last_ave_beacon_signal = sig; 2973 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW); 2974 } 2975 } 2976 2977 if (bss_conf->cqm_rssi_thold && 2978 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 2979 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 2980 int sig = ifmgd->ave_beacon_signal / 16; 2981 int last_event = ifmgd->last_cqm_event_signal; 2982 int thold = bss_conf->cqm_rssi_thold; 2983 int hyst = bss_conf->cqm_rssi_hyst; 2984 if (sig < thold && 2985 (last_event == 0 || sig < last_event - hyst)) { 2986 ifmgd->last_cqm_event_signal = sig; 2987 ieee80211_cqm_rssi_notify( 2988 &sdata->vif, 2989 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 2990 GFP_KERNEL); 2991 } else if (sig > thold && 2992 (last_event == 0 || sig > last_event + hyst)) { 2993 ifmgd->last_cqm_event_signal = sig; 2994 ieee80211_cqm_rssi_notify( 2995 &sdata->vif, 2996 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 2997 GFP_KERNEL); 2998 } 2999 } 3000 3001 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3002 mlme_dbg_ratelimited(sdata, 3003 "cancelling AP probe due to a received beacon\n"); 3004 ieee80211_reset_ap_probe(sdata); 3005 } 3006 3007 /* 3008 * Push the beacon loss detection into the future since 3009 * we are processing a beacon from the AP just now. 3010 */ 3011 ieee80211_sta_reset_beacon_monitor(sdata); 3012 3013 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3014 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3015 len - baselen, false, &elems, 3016 care_about_ies, ncrc); 3017 3018 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { 3019 bool directed_tim = ieee80211_check_tim(elems.tim, 3020 elems.tim_len, 3021 ifmgd->aid); 3022 if (directed_tim) { 3023 if (local->hw.conf.dynamic_ps_timeout > 0) { 3024 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3025 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3026 ieee80211_hw_config(local, 3027 IEEE80211_CONF_CHANGE_PS); 3028 } 3029 ieee80211_send_nullfunc(local, sdata, 0); 3030 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3031 local->pspolling = true; 3032 3033 /* 3034 * Here is assumed that the driver will be 3035 * able to send ps-poll frame and receive a 3036 * response even though power save mode is 3037 * enabled, but some drivers might require 3038 * to disable power save here. This needs 3039 * to be investigated. 3040 */ 3041 ieee80211_send_pspoll(local, sdata); 3042 } 3043 } 3044 } 3045 3046 if (sdata->vif.p2p) { 3047 struct ieee80211_p2p_noa_attr noa = {}; 3048 int ret; 3049 3050 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3051 len - baselen, 3052 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3053 (u8 *) &noa, sizeof(noa)); 3054 if (ret >= 2) { 3055 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3056 /* valid noa_attr and index changed */ 3057 sdata->u.mgd.p2p_noa_index = noa.index; 3058 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3059 changed |= BSS_CHANGED_P2P_PS; 3060 /* 3061 * make sure we update all information, the CRC 3062 * mechanism doesn't look at P2P attributes. 3063 */ 3064 ifmgd->beacon_crc_valid = false; 3065 } 3066 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3067 /* noa_attr not found and we had valid noa_attr before */ 3068 sdata->u.mgd.p2p_noa_index = -1; 3069 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3070 changed |= BSS_CHANGED_P2P_PS; 3071 ifmgd->beacon_crc_valid = false; 3072 } 3073 } 3074 3075 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3076 return; 3077 ifmgd->beacon_crc = ncrc; 3078 ifmgd->beacon_crc_valid = true; 3079 3080 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3081 3082 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3083 &elems, true); 3084 3085 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3086 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3087 elems.wmm_param_len)) 3088 changed |= BSS_CHANGED_QOS; 3089 3090 /* 3091 * If we haven't had a beacon before, tell the driver about the 3092 * DTIM period (and beacon timing if desired) now. 3093 */ 3094 if (!ifmgd->have_beacon) { 3095 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3096 if (elems.tim) 3097 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3098 else 3099 bss_conf->dtim_period = 1; 3100 3101 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 3102 sdata->vif.bss_conf.sync_tsf = 3103 le64_to_cpu(mgmt->u.beacon.timestamp); 3104 sdata->vif.bss_conf.sync_device_ts = 3105 rx_status->device_timestamp; 3106 if (elems.tim) 3107 sdata->vif.bss_conf.sync_dtim_count = 3108 elems.tim->dtim_count; 3109 else 3110 sdata->vif.bss_conf.sync_dtim_count = 0; 3111 } 3112 3113 changed |= BSS_CHANGED_BEACON_INFO; 3114 ifmgd->have_beacon = true; 3115 3116 mutex_lock(&local->iflist_mtx); 3117 ieee80211_recalc_ps(local, -1); 3118 mutex_unlock(&local->iflist_mtx); 3119 3120 ieee80211_recalc_ps_vif(sdata); 3121 } 3122 3123 if (elems.erp_info) { 3124 erp_valid = true; 3125 erp_value = elems.erp_info[0]; 3126 } else { 3127 erp_valid = false; 3128 } 3129 changed |= ieee80211_handle_bss_capability(sdata, 3130 le16_to_cpu(mgmt->u.beacon.capab_info), 3131 erp_valid, erp_value); 3132 3133 mutex_lock(&local->sta_mtx); 3134 sta = sta_info_get(sdata, bssid); 3135 3136 if (ieee80211_config_bw(sdata, sta, elems.ht_operation, 3137 elems.vht_operation, bssid, &changed)) { 3138 mutex_unlock(&local->sta_mtx); 3139 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3140 WLAN_REASON_DEAUTH_LEAVING, 3141 true, deauth_buf); 3142 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf, 3143 sizeof(deauth_buf)); 3144 return; 3145 } 3146 3147 if (sta && elems.opmode_notif) 3148 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3149 rx_status->band, true); 3150 mutex_unlock(&local->sta_mtx); 3151 3152 if (elems.country_elem && elems.pwr_constr_elem && 3153 mgmt->u.probe_resp.capab_info & 3154 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) 3155 changed |= ieee80211_handle_pwr_constr(sdata, chan, 3156 elems.country_elem, 3157 elems.country_elem_len, 3158 elems.pwr_constr_elem); 3159 3160 ieee80211_bss_info_change_notify(sdata, changed); 3161 } 3162 3163 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3164 struct sk_buff *skb) 3165 { 3166 struct ieee80211_rx_status *rx_status; 3167 struct ieee80211_mgmt *mgmt; 3168 u16 fc; 3169 struct ieee802_11_elems elems; 3170 int ies_len; 3171 3172 rx_status = (struct ieee80211_rx_status *) skb->cb; 3173 mgmt = (struct ieee80211_mgmt *) skb->data; 3174 fc = le16_to_cpu(mgmt->frame_control); 3175 3176 sdata_lock(sdata); 3177 3178 switch (fc & IEEE80211_FCTL_STYPE) { 3179 case IEEE80211_STYPE_BEACON: 3180 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3181 break; 3182 case IEEE80211_STYPE_PROBE_RESP: 3183 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3184 break; 3185 case IEEE80211_STYPE_AUTH: 3186 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3187 break; 3188 case IEEE80211_STYPE_DEAUTH: 3189 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3190 break; 3191 case IEEE80211_STYPE_DISASSOC: 3192 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3193 break; 3194 case IEEE80211_STYPE_ASSOC_RESP: 3195 case IEEE80211_STYPE_REASSOC_RESP: 3196 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3197 break; 3198 case IEEE80211_STYPE_ACTION: 3199 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3200 ies_len = skb->len - 3201 offsetof(struct ieee80211_mgmt, 3202 u.action.u.chan_switch.variable); 3203 3204 if (ies_len < 0) 3205 break; 3206 3207 ieee802_11_parse_elems( 3208 mgmt->u.action.u.chan_switch.variable, 3209 ies_len, true, &elems); 3210 3211 if (elems.parse_error) 3212 break; 3213 3214 ieee80211_sta_process_chanswitch(sdata, 3215 rx_status->mactime, 3216 &elems, false); 3217 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3218 ies_len = skb->len - 3219 offsetof(struct ieee80211_mgmt, 3220 u.action.u.ext_chan_switch.variable); 3221 3222 if (ies_len < 0) 3223 break; 3224 3225 ieee802_11_parse_elems( 3226 mgmt->u.action.u.ext_chan_switch.variable, 3227 ies_len, true, &elems); 3228 3229 if (elems.parse_error) 3230 break; 3231 3232 /* for the handling code pretend this was also an IE */ 3233 elems.ext_chansw_ie = 3234 &mgmt->u.action.u.ext_chan_switch.data; 3235 3236 ieee80211_sta_process_chanswitch(sdata, 3237 rx_status->mactime, 3238 &elems, false); 3239 } 3240 break; 3241 } 3242 sdata_unlock(sdata); 3243 } 3244 3245 static void ieee80211_sta_timer(unsigned long data) 3246 { 3247 struct ieee80211_sub_if_data *sdata = 3248 (struct ieee80211_sub_if_data *) data; 3249 3250 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3251 } 3252 3253 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3254 u8 *bssid, u8 reason, bool tx) 3255 { 3256 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3257 3258 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3259 tx, frame_buf); 3260 3261 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 3262 IEEE80211_DEAUTH_FRAME_LEN); 3263 } 3264 3265 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) 3266 { 3267 struct ieee80211_local *local = sdata->local; 3268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3269 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3270 u32 tx_flags = 0; 3271 3272 sdata_assert_lock(sdata); 3273 3274 if (WARN_ON_ONCE(!auth_data)) 3275 return -EINVAL; 3276 3277 auth_data->tries++; 3278 3279 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3280 sdata_info(sdata, "authentication with %pM timed out\n", 3281 auth_data->bss->bssid); 3282 3283 /* 3284 * Most likely AP is not in the range so remove the 3285 * bss struct for that AP. 3286 */ 3287 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3288 3289 return -ETIMEDOUT; 3290 } 3291 3292 drv_mgd_prepare_tx(local, sdata); 3293 3294 if (auth_data->bss->proberesp_ies) { 3295 u16 trans = 1; 3296 u16 status = 0; 3297 3298 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3299 auth_data->bss->bssid, auth_data->tries, 3300 IEEE80211_AUTH_MAX_TRIES); 3301 3302 auth_data->expected_transaction = 2; 3303 3304 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3305 trans = auth_data->sae_trans; 3306 status = auth_data->sae_status; 3307 auth_data->expected_transaction = trans; 3308 } 3309 3310 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 3311 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3312 IEEE80211_TX_INTFL_MLME_CONN_TX; 3313 3314 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3315 auth_data->data, auth_data->data_len, 3316 auth_data->bss->bssid, 3317 auth_data->bss->bssid, NULL, 0, 0, 3318 tx_flags); 3319 } else { 3320 const u8 *ssidie; 3321 3322 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", 3323 auth_data->bss->bssid, auth_data->tries, 3324 IEEE80211_AUTH_MAX_TRIES); 3325 3326 rcu_read_lock(); 3327 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); 3328 if (!ssidie) { 3329 rcu_read_unlock(); 3330 return -EINVAL; 3331 } 3332 /* 3333 * Direct probe is sent to broadcast address as some APs 3334 * will not answer to direct packet in unassociated state. 3335 */ 3336 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1], 3337 NULL, 0, (u32) -1, true, 0, 3338 auth_data->bss->channel, false); 3339 rcu_read_unlock(); 3340 } 3341 3342 if (tx_flags == 0) { 3343 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3344 auth_data->timeout_started = true; 3345 run_again(sdata, auth_data->timeout); 3346 } else { 3347 auth_data->timeout = 3348 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3349 auth_data->timeout_started = true; 3350 run_again(sdata, auth_data->timeout); 3351 } 3352 3353 return 0; 3354 } 3355 3356 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3357 { 3358 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3359 struct ieee80211_local *local = sdata->local; 3360 3361 sdata_assert_lock(sdata); 3362 3363 assoc_data->tries++; 3364 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3365 sdata_info(sdata, "association with %pM timed out\n", 3366 assoc_data->bss->bssid); 3367 3368 /* 3369 * Most likely AP is not in the range so remove the 3370 * bss struct for that AP. 3371 */ 3372 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3373 3374 return -ETIMEDOUT; 3375 } 3376 3377 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3378 assoc_data->bss->bssid, assoc_data->tries, 3379 IEEE80211_ASSOC_MAX_TRIES); 3380 ieee80211_send_assoc(sdata); 3381 3382 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { 3383 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3384 assoc_data->timeout_started = true; 3385 run_again(sdata, assoc_data->timeout); 3386 } else { 3387 assoc_data->timeout = 3388 round_jiffies_up(jiffies + 3389 IEEE80211_ASSOC_TIMEOUT_LONG); 3390 assoc_data->timeout_started = true; 3391 run_again(sdata, assoc_data->timeout); 3392 } 3393 3394 return 0; 3395 } 3396 3397 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3398 __le16 fc, bool acked) 3399 { 3400 struct ieee80211_local *local = sdata->local; 3401 3402 sdata->u.mgd.status_fc = fc; 3403 sdata->u.mgd.status_acked = acked; 3404 sdata->u.mgd.status_received = true; 3405 3406 ieee80211_queue_work(&local->hw, &sdata->work); 3407 } 3408 3409 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3410 { 3411 struct ieee80211_local *local = sdata->local; 3412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3413 3414 sdata_lock(sdata); 3415 3416 if (ifmgd->status_received) { 3417 __le16 fc = ifmgd->status_fc; 3418 bool status_acked = ifmgd->status_acked; 3419 3420 ifmgd->status_received = false; 3421 if (ifmgd->auth_data && 3422 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) { 3423 if (status_acked) { 3424 ifmgd->auth_data->timeout = 3425 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3426 run_again(sdata, ifmgd->auth_data->timeout); 3427 } else { 3428 ifmgd->auth_data->timeout = jiffies - 1; 3429 } 3430 ifmgd->auth_data->timeout_started = true; 3431 } else if (ifmgd->assoc_data && 3432 (ieee80211_is_assoc_req(fc) || 3433 ieee80211_is_reassoc_req(fc))) { 3434 if (status_acked) { 3435 ifmgd->assoc_data->timeout = 3436 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3437 run_again(sdata, ifmgd->assoc_data->timeout); 3438 } else { 3439 ifmgd->assoc_data->timeout = jiffies - 1; 3440 } 3441 ifmgd->assoc_data->timeout_started = true; 3442 } 3443 } 3444 3445 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3446 time_after(jiffies, ifmgd->auth_data->timeout)) { 3447 if (ifmgd->auth_data->done) { 3448 /* 3449 * ok ... we waited for assoc but userspace didn't, 3450 * so let's just kill the auth data 3451 */ 3452 ieee80211_destroy_auth_data(sdata, false); 3453 } else if (ieee80211_probe_auth(sdata)) { 3454 u8 bssid[ETH_ALEN]; 3455 3456 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3457 3458 ieee80211_destroy_auth_data(sdata, false); 3459 3460 cfg80211_auth_timeout(sdata->dev, bssid); 3461 } 3462 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3463 run_again(sdata, ifmgd->auth_data->timeout); 3464 3465 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3466 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3467 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3468 ieee80211_do_assoc(sdata)) { 3469 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3470 3471 ieee80211_destroy_assoc_data(sdata, false); 3472 cfg80211_assoc_timeout(sdata->dev, bss); 3473 } 3474 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3475 run_again(sdata, ifmgd->assoc_data->timeout); 3476 3477 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3478 ifmgd->associated) { 3479 u8 bssid[ETH_ALEN]; 3480 int max_tries; 3481 3482 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3483 3484 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 3485 max_tries = max_nullfunc_tries; 3486 else 3487 max_tries = max_probe_tries; 3488 3489 /* ACK received for nullfunc probing frame */ 3490 if (!ifmgd->probe_send_count) 3491 ieee80211_reset_ap_probe(sdata); 3492 else if (ifmgd->nullfunc_failed) { 3493 if (ifmgd->probe_send_count < max_tries) { 3494 mlme_dbg(sdata, 3495 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3496 bssid, ifmgd->probe_send_count, 3497 max_tries); 3498 ieee80211_mgd_probe_ap_send(sdata); 3499 } else { 3500 mlme_dbg(sdata, 3501 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3502 bssid); 3503 ieee80211_sta_connection_lost(sdata, bssid, 3504 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3505 false); 3506 } 3507 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3508 run_again(sdata, ifmgd->probe_timeout); 3509 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 3510 mlme_dbg(sdata, 3511 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3512 bssid, probe_wait_ms); 3513 ieee80211_sta_connection_lost(sdata, bssid, 3514 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3515 } else if (ifmgd->probe_send_count < max_tries) { 3516 mlme_dbg(sdata, 3517 "No probe response from AP %pM after %dms, try %d/%i\n", 3518 bssid, probe_wait_ms, 3519 ifmgd->probe_send_count, max_tries); 3520 ieee80211_mgd_probe_ap_send(sdata); 3521 } else { 3522 /* 3523 * We actually lost the connection ... or did we? 3524 * Let's make sure! 3525 */ 3526 wiphy_debug(local->hw.wiphy, 3527 "%s: No probe response from AP %pM" 3528 " after %dms, disconnecting.\n", 3529 sdata->name, 3530 bssid, probe_wait_ms); 3531 3532 ieee80211_sta_connection_lost(sdata, bssid, 3533 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3534 } 3535 } 3536 3537 sdata_unlock(sdata); 3538 } 3539 3540 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 3541 { 3542 struct ieee80211_sub_if_data *sdata = 3543 (struct ieee80211_sub_if_data *) data; 3544 struct ieee80211_local *local = sdata->local; 3545 3546 if (local->quiescing) 3547 return; 3548 3549 sdata->u.mgd.connection_loss = false; 3550 ieee80211_queue_work(&sdata->local->hw, 3551 &sdata->u.mgd.beacon_connection_loss_work); 3552 } 3553 3554 static void ieee80211_sta_conn_mon_timer(unsigned long data) 3555 { 3556 struct ieee80211_sub_if_data *sdata = 3557 (struct ieee80211_sub_if_data *) data; 3558 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3559 struct ieee80211_local *local = sdata->local; 3560 3561 if (local->quiescing) 3562 return; 3563 3564 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 3565 } 3566 3567 static void ieee80211_sta_monitor_work(struct work_struct *work) 3568 { 3569 struct ieee80211_sub_if_data *sdata = 3570 container_of(work, struct ieee80211_sub_if_data, 3571 u.mgd.monitor_work); 3572 3573 ieee80211_mgd_probe_ap(sdata, false); 3574 } 3575 3576 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 3577 { 3578 u32 flags; 3579 3580 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 3581 __ieee80211_stop_poll(sdata); 3582 3583 /* let's probe the connection once */ 3584 flags = sdata->local->hw.flags; 3585 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) 3586 ieee80211_queue_work(&sdata->local->hw, 3587 &sdata->u.mgd.monitor_work); 3588 /* and do all the other regular work too */ 3589 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3590 } 3591 } 3592 3593 #ifdef CONFIG_PM 3594 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 3595 { 3596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3597 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3598 3599 sdata_lock(sdata); 3600 3601 if (ifmgd->auth_data) { 3602 /* 3603 * If we are trying to authenticate while suspending, cfg80211 3604 * won't know and won't actually abort those attempts, thus we 3605 * need to do that ourselves. 3606 */ 3607 ieee80211_send_deauth_disassoc(sdata, 3608 ifmgd->auth_data->bss->bssid, 3609 IEEE80211_STYPE_DEAUTH, 3610 WLAN_REASON_DEAUTH_LEAVING, 3611 false, frame_buf); 3612 ieee80211_destroy_auth_data(sdata, false); 3613 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 3614 IEEE80211_DEAUTH_FRAME_LEN); 3615 } 3616 3617 sdata_unlock(sdata); 3618 } 3619 3620 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 3621 { 3622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3623 3624 sdata_lock(sdata); 3625 if (!ifmgd->associated) { 3626 sdata_unlock(sdata); 3627 return; 3628 } 3629 3630 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 3631 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 3632 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 3633 ieee80211_sta_connection_lost(sdata, 3634 ifmgd->associated->bssid, 3635 WLAN_REASON_UNSPECIFIED, 3636 true); 3637 sdata_unlock(sdata); 3638 return; 3639 } 3640 sdata_unlock(sdata); 3641 } 3642 #endif 3643 3644 /* interface setup */ 3645 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 3646 { 3647 struct ieee80211_if_managed *ifmgd; 3648 3649 ifmgd = &sdata->u.mgd; 3650 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 3651 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 3652 INIT_WORK(&ifmgd->beacon_connection_loss_work, 3653 ieee80211_beacon_connection_loss_work); 3654 INIT_WORK(&ifmgd->csa_connection_drop_work, 3655 ieee80211_csa_connection_drop_work); 3656 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 3657 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 3658 (unsigned long) sdata); 3659 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 3660 (unsigned long) sdata); 3661 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 3662 (unsigned long) sdata); 3663 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 3664 (unsigned long) sdata); 3665 3666 ifmgd->flags = 0; 3667 ifmgd->powersave = sdata->wdev.ps; 3668 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 3669 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 3670 ifmgd->p2p_noa_index = -1; 3671 3672 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) 3673 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 3674 else 3675 ifmgd->req_smps = IEEE80211_SMPS_OFF; 3676 } 3677 3678 /* scan finished notification */ 3679 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 3680 { 3681 struct ieee80211_sub_if_data *sdata; 3682 3683 /* Restart STA timers */ 3684 rcu_read_lock(); 3685 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 3686 if (ieee80211_sdata_running(sdata)) 3687 ieee80211_restart_sta_timer(sdata); 3688 } 3689 rcu_read_unlock(); 3690 } 3691 3692 int ieee80211_max_network_latency(struct notifier_block *nb, 3693 unsigned long data, void *dummy) 3694 { 3695 s32 latency_usec = (s32) data; 3696 struct ieee80211_local *local = 3697 container_of(nb, struct ieee80211_local, 3698 network_latency_notifier); 3699 3700 mutex_lock(&local->iflist_mtx); 3701 ieee80211_recalc_ps(local, latency_usec); 3702 mutex_unlock(&local->iflist_mtx); 3703 3704 return 0; 3705 } 3706 3707 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 3708 struct cfg80211_bss *cbss) 3709 { 3710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3711 const u8 *ht_cap_ie, *vht_cap_ie; 3712 const struct ieee80211_ht_cap *ht_cap; 3713 const struct ieee80211_vht_cap *vht_cap; 3714 u8 chains = 1; 3715 3716 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 3717 return chains; 3718 3719 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 3720 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 3721 ht_cap = (void *)(ht_cap_ie + 2); 3722 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 3723 /* 3724 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 3725 * "Tx Unequal Modulation Supported" fields. 3726 */ 3727 } 3728 3729 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 3730 return chains; 3731 3732 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 3733 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 3734 u8 nss; 3735 u16 tx_mcs_map; 3736 3737 vht_cap = (void *)(vht_cap_ie + 2); 3738 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 3739 for (nss = 8; nss > 0; nss--) { 3740 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 3741 IEEE80211_VHT_MCS_NOT_SUPPORTED) 3742 break; 3743 } 3744 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 3745 chains = max(chains, nss); 3746 } 3747 3748 return chains; 3749 } 3750 3751 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 3752 struct cfg80211_bss *cbss) 3753 { 3754 struct ieee80211_local *local = sdata->local; 3755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3756 const struct ieee80211_ht_operation *ht_oper = NULL; 3757 const struct ieee80211_vht_operation *vht_oper = NULL; 3758 struct ieee80211_supported_band *sband; 3759 struct cfg80211_chan_def chandef; 3760 int ret; 3761 3762 sband = local->hw.wiphy->bands[cbss->channel->band]; 3763 3764 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 3765 IEEE80211_STA_DISABLE_80P80MHZ | 3766 IEEE80211_STA_DISABLE_160MHZ); 3767 3768 rcu_read_lock(); 3769 3770 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3771 sband->ht_cap.ht_supported) { 3772 const u8 *ht_oper_ie, *ht_cap; 3773 3774 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 3775 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 3776 ht_oper = (void *)(ht_oper_ie + 2); 3777 3778 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 3779 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) { 3780 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 3781 ht_oper = NULL; 3782 } 3783 } 3784 3785 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3786 sband->vht_cap.vht_supported) { 3787 const u8 *vht_oper_ie, *vht_cap; 3788 3789 vht_oper_ie = ieee80211_bss_get_ie(cbss, 3790 WLAN_EID_VHT_OPERATION); 3791 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 3792 vht_oper = (void *)(vht_oper_ie + 2); 3793 if (vht_oper && !ht_oper) { 3794 vht_oper = NULL; 3795 sdata_info(sdata, 3796 "AP advertised VHT without HT, disabling both\n"); 3797 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 3798 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 3799 } 3800 3801 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 3802 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 3803 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 3804 vht_oper = NULL; 3805 } 3806 } 3807 3808 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 3809 cbss->channel, 3810 ht_oper, vht_oper, 3811 &chandef, false); 3812 3813 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 3814 local->rx_chains); 3815 3816 rcu_read_unlock(); 3817 3818 /* will change later if needed */ 3819 sdata->smps_mode = IEEE80211_SMPS_OFF; 3820 3821 mutex_lock(&local->mtx); 3822 /* 3823 * If this fails (possibly due to channel context sharing 3824 * on incompatible channels, e.g. 80+80 and 160 sharing the 3825 * same control channel) try to use a smaller bandwidth. 3826 */ 3827 ret = ieee80211_vif_use_channel(sdata, &chandef, 3828 IEEE80211_CHANCTX_SHARED); 3829 3830 /* don't downgrade for 5 and 10 MHz channels, though. */ 3831 if (chandef.width == NL80211_CHAN_WIDTH_5 || 3832 chandef.width == NL80211_CHAN_WIDTH_10) 3833 goto out; 3834 3835 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 3836 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 3837 ret = ieee80211_vif_use_channel(sdata, &chandef, 3838 IEEE80211_CHANCTX_SHARED); 3839 } 3840 out: 3841 mutex_unlock(&local->mtx); 3842 return ret; 3843 } 3844 3845 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 3846 struct cfg80211_bss *cbss, bool assoc) 3847 { 3848 struct ieee80211_local *local = sdata->local; 3849 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3850 struct ieee80211_bss *bss = (void *)cbss->priv; 3851 struct sta_info *new_sta = NULL; 3852 bool have_sta = false; 3853 int err; 3854 3855 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 3856 return -EINVAL; 3857 3858 if (assoc) { 3859 rcu_read_lock(); 3860 have_sta = sta_info_get(sdata, cbss->bssid); 3861 rcu_read_unlock(); 3862 } 3863 3864 if (!have_sta) { 3865 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 3866 if (!new_sta) 3867 return -ENOMEM; 3868 } 3869 if (new_sta) { 3870 u32 rates = 0, basic_rates = 0; 3871 bool have_higher_than_11mbit; 3872 int min_rate = INT_MAX, min_rate_index = -1; 3873 struct ieee80211_chanctx_conf *chanctx_conf; 3874 struct ieee80211_supported_band *sband; 3875 const struct cfg80211_bss_ies *ies; 3876 int shift; 3877 u32 rate_flags; 3878 3879 sband = local->hw.wiphy->bands[cbss->channel->band]; 3880 3881 err = ieee80211_prep_channel(sdata, cbss); 3882 if (err) { 3883 sta_info_free(local, new_sta); 3884 return -EINVAL; 3885 } 3886 shift = ieee80211_vif_get_shift(&sdata->vif); 3887 3888 rcu_read_lock(); 3889 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3890 if (WARN_ON(!chanctx_conf)) { 3891 rcu_read_unlock(); 3892 sta_info_free(local, new_sta); 3893 return -EINVAL; 3894 } 3895 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 3896 rcu_read_unlock(); 3897 3898 ieee80211_get_rates(sband, bss->supp_rates, 3899 bss->supp_rates_len, 3900 &rates, &basic_rates, 3901 &have_higher_than_11mbit, 3902 &min_rate, &min_rate_index, 3903 shift, rate_flags); 3904 3905 /* 3906 * This used to be a workaround for basic rates missing 3907 * in the association response frame. Now that we no 3908 * longer use the basic rates from there, it probably 3909 * doesn't happen any more, but keep the workaround so 3910 * in case some *other* APs are buggy in different ways 3911 * we can connect -- with a warning. 3912 */ 3913 if (!basic_rates && min_rate_index >= 0) { 3914 sdata_info(sdata, 3915 "No basic rates, using min rate instead\n"); 3916 basic_rates = BIT(min_rate_index); 3917 } 3918 3919 new_sta->sta.supp_rates[cbss->channel->band] = rates; 3920 sdata->vif.bss_conf.basic_rates = basic_rates; 3921 3922 /* cf. IEEE 802.11 9.2.12 */ 3923 if (cbss->channel->band == IEEE80211_BAND_2GHZ && 3924 have_higher_than_11mbit) 3925 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 3926 else 3927 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 3928 3929 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 3930 3931 /* set timing information */ 3932 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 3933 rcu_read_lock(); 3934 ies = rcu_dereference(cbss->beacon_ies); 3935 if (ies) { 3936 const u8 *tim_ie; 3937 3938 sdata->vif.bss_conf.sync_tsf = ies->tsf; 3939 sdata->vif.bss_conf.sync_device_ts = 3940 bss->device_ts_beacon; 3941 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 3942 ies->data, ies->len); 3943 if (tim_ie && tim_ie[1] >= 2) 3944 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 3945 else 3946 sdata->vif.bss_conf.sync_dtim_count = 0; 3947 } else if (!(local->hw.flags & 3948 IEEE80211_HW_TIMING_BEACON_ONLY)) { 3949 ies = rcu_dereference(cbss->proberesp_ies); 3950 /* must be non-NULL since beacon IEs were NULL */ 3951 sdata->vif.bss_conf.sync_tsf = ies->tsf; 3952 sdata->vif.bss_conf.sync_device_ts = 3953 bss->device_ts_presp; 3954 sdata->vif.bss_conf.sync_dtim_count = 0; 3955 } else { 3956 sdata->vif.bss_conf.sync_tsf = 0; 3957 sdata->vif.bss_conf.sync_device_ts = 0; 3958 sdata->vif.bss_conf.sync_dtim_count = 0; 3959 } 3960 rcu_read_unlock(); 3961 3962 /* tell driver about BSSID, basic rates and timing */ 3963 ieee80211_bss_info_change_notify(sdata, 3964 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 3965 BSS_CHANGED_BEACON_INT); 3966 3967 if (assoc) 3968 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 3969 3970 err = sta_info_insert(new_sta); 3971 new_sta = NULL; 3972 if (err) { 3973 sdata_info(sdata, 3974 "failed to insert STA entry for the AP (error %d)\n", 3975 err); 3976 return err; 3977 } 3978 } else 3979 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 3980 3981 return 0; 3982 } 3983 3984 /* config hooks */ 3985 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 3986 struct cfg80211_auth_request *req) 3987 { 3988 struct ieee80211_local *local = sdata->local; 3989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3990 struct ieee80211_mgd_auth_data *auth_data; 3991 u16 auth_alg; 3992 int err; 3993 3994 /* prepare auth data structure */ 3995 3996 switch (req->auth_type) { 3997 case NL80211_AUTHTYPE_OPEN_SYSTEM: 3998 auth_alg = WLAN_AUTH_OPEN; 3999 break; 4000 case NL80211_AUTHTYPE_SHARED_KEY: 4001 if (IS_ERR(local->wep_tx_tfm)) 4002 return -EOPNOTSUPP; 4003 auth_alg = WLAN_AUTH_SHARED_KEY; 4004 break; 4005 case NL80211_AUTHTYPE_FT: 4006 auth_alg = WLAN_AUTH_FT; 4007 break; 4008 case NL80211_AUTHTYPE_NETWORK_EAP: 4009 auth_alg = WLAN_AUTH_LEAP; 4010 break; 4011 case NL80211_AUTHTYPE_SAE: 4012 auth_alg = WLAN_AUTH_SAE; 4013 break; 4014 default: 4015 return -EOPNOTSUPP; 4016 } 4017 4018 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + 4019 req->ie_len, GFP_KERNEL); 4020 if (!auth_data) 4021 return -ENOMEM; 4022 4023 auth_data->bss = req->bss; 4024 4025 if (req->sae_data_len >= 4) { 4026 __le16 *pos = (__le16 *) req->sae_data; 4027 auth_data->sae_trans = le16_to_cpu(pos[0]); 4028 auth_data->sae_status = le16_to_cpu(pos[1]); 4029 memcpy(auth_data->data, req->sae_data + 4, 4030 req->sae_data_len - 4); 4031 auth_data->data_len += req->sae_data_len - 4; 4032 } 4033 4034 if (req->ie && req->ie_len) { 4035 memcpy(&auth_data->data[auth_data->data_len], 4036 req->ie, req->ie_len); 4037 auth_data->data_len += req->ie_len; 4038 } 4039 4040 if (req->key && req->key_len) { 4041 auth_data->key_len = req->key_len; 4042 auth_data->key_idx = req->key_idx; 4043 memcpy(auth_data->key, req->key, req->key_len); 4044 } 4045 4046 auth_data->algorithm = auth_alg; 4047 4048 /* try to authenticate/probe */ 4049 4050 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4051 ifmgd->assoc_data) { 4052 err = -EBUSY; 4053 goto err_free; 4054 } 4055 4056 if (ifmgd->auth_data) 4057 ieee80211_destroy_auth_data(sdata, false); 4058 4059 /* prep auth_data so we don't go into idle on disassoc */ 4060 ifmgd->auth_data = auth_data; 4061 4062 if (ifmgd->associated) { 4063 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4064 4065 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4066 WLAN_REASON_UNSPECIFIED, 4067 false, frame_buf); 4068 4069 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4070 sizeof(frame_buf)); 4071 } 4072 4073 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4074 4075 err = ieee80211_prep_connection(sdata, req->bss, false); 4076 if (err) 4077 goto err_clear; 4078 4079 err = ieee80211_probe_auth(sdata); 4080 if (err) { 4081 sta_info_destroy_addr(sdata, req->bss->bssid); 4082 goto err_clear; 4083 } 4084 4085 /* hold our own reference */ 4086 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4087 return 0; 4088 4089 err_clear: 4090 memset(ifmgd->bssid, 0, ETH_ALEN); 4091 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4092 ifmgd->auth_data = NULL; 4093 err_free: 4094 kfree(auth_data); 4095 return err; 4096 } 4097 4098 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata, 4099 const u8 *wmm_param, int len) 4100 { 4101 const u8 *pos; 4102 size_t left; 4103 4104 if (len < 8) 4105 return false; 4106 4107 if (wmm_param[5] != 1 /* version */) 4108 return false; 4109 4110 pos = wmm_param + 8; 4111 left = len - 8; 4112 4113 for (; left >= 4; left -= 4, pos += 4) { 4114 u8 aifsn = pos[0] & 0x0f; 4115 u8 ecwmin = pos[1] & 0x0f; 4116 u8 ecwmax = (pos[1] & 0xf0) >> 4; 4117 int aci = (pos[0] >> 5) & 0x03; 4118 4119 if (aifsn < 2) { 4120 sdata_info(sdata, 4121 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n", 4122 aifsn, aci); 4123 return false; 4124 } 4125 if (ecwmin > ecwmax) { 4126 sdata_info(sdata, 4127 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n", 4128 ecwmin, ecwmax, aci); 4129 return false; 4130 } 4131 } 4132 4133 return true; 4134 } 4135 4136 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4137 struct cfg80211_assoc_request *req) 4138 { 4139 struct ieee80211_local *local = sdata->local; 4140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4141 struct ieee80211_bss *bss = (void *)req->bss->priv; 4142 struct ieee80211_mgd_assoc_data *assoc_data; 4143 const struct cfg80211_bss_ies *beacon_ies; 4144 struct ieee80211_supported_band *sband; 4145 const u8 *ssidie, *ht_ie, *vht_ie; 4146 int i, err; 4147 4148 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4149 if (!assoc_data) 4150 return -ENOMEM; 4151 4152 rcu_read_lock(); 4153 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4154 if (!ssidie) { 4155 rcu_read_unlock(); 4156 kfree(assoc_data); 4157 return -EINVAL; 4158 } 4159 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4160 assoc_data->ssid_len = ssidie[1]; 4161 rcu_read_unlock(); 4162 4163 if (ifmgd->associated) { 4164 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4165 4166 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4167 WLAN_REASON_UNSPECIFIED, 4168 false, frame_buf); 4169 4170 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4171 sizeof(frame_buf)); 4172 } 4173 4174 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4175 err = -EBUSY; 4176 goto err_free; 4177 } 4178 4179 if (ifmgd->assoc_data) { 4180 err = -EBUSY; 4181 goto err_free; 4182 } 4183 4184 if (ifmgd->auth_data) { 4185 bool match; 4186 4187 /* keep sta info, bssid if matching */ 4188 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4189 ieee80211_destroy_auth_data(sdata, match); 4190 } 4191 4192 /* prepare assoc data */ 4193 4194 ifmgd->beacon_crc_valid = false; 4195 4196 assoc_data->wmm = bss->wmm_used && 4197 (local->hw.queues >= IEEE80211_NUM_ACS); 4198 if (assoc_data->wmm) { 4199 /* try to check validity of WMM params IE */ 4200 const struct cfg80211_bss_ies *ies; 4201 const u8 *wp, *start, *end; 4202 4203 rcu_read_lock(); 4204 ies = rcu_dereference(req->bss->ies); 4205 start = ies->data; 4206 end = start + ies->len; 4207 4208 while (true) { 4209 wp = cfg80211_find_vendor_ie( 4210 WLAN_OUI_MICROSOFT, 4211 WLAN_OUI_TYPE_MICROSOFT_WMM, 4212 start, end - start); 4213 if (!wp) 4214 break; 4215 start = wp + wp[1] + 2; 4216 /* if this IE is too short, try the next */ 4217 if (wp[1] <= 4) 4218 continue; 4219 /* if this IE is WMM params, we found what we wanted */ 4220 if (wp[6] == 1) 4221 break; 4222 } 4223 4224 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2, 4225 wp[1] - 2)) { 4226 assoc_data->wmm = false; 4227 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 4228 } 4229 rcu_read_unlock(); 4230 } 4231 4232 /* 4233 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4234 * We still associate in non-HT mode (11a/b/g) if any one of these 4235 * ciphers is configured as pairwise. 4236 * We can set this to true for non-11n hardware, that'll be checked 4237 * separately along with the peer capabilities. 4238 */ 4239 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4240 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4241 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4242 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4243 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4244 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4245 netdev_info(sdata->dev, 4246 "disabling HT/VHT due to WEP/TKIP use\n"); 4247 } 4248 } 4249 4250 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4251 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4252 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4253 } 4254 4255 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4256 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4257 4258 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4259 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4260 if (!sband->ht_cap.ht_supported || 4261 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4262 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4263 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4264 if (!bss->wmm_used && 4265 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4266 netdev_info(sdata->dev, 4267 "disabling HT as WMM/QoS is not supported by the AP\n"); 4268 } 4269 4270 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4271 if (!sband->vht_cap.vht_supported || 4272 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4273 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4274 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4275 if (!bss->wmm_used && 4276 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4277 netdev_info(sdata->dev, 4278 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4279 } 4280 4281 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4282 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4283 sizeof(ifmgd->ht_capa_mask)); 4284 4285 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4286 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4287 sizeof(ifmgd->vht_capa_mask)); 4288 4289 if (req->ie && req->ie_len) { 4290 memcpy(assoc_data->ie, req->ie, req->ie_len); 4291 assoc_data->ie_len = req->ie_len; 4292 } 4293 4294 assoc_data->bss = req->bss; 4295 4296 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4297 if (ifmgd->powersave) 4298 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4299 else 4300 sdata->smps_mode = IEEE80211_SMPS_OFF; 4301 } else 4302 sdata->smps_mode = ifmgd->req_smps; 4303 4304 assoc_data->capability = req->bss->capability; 4305 assoc_data->supp_rates = bss->supp_rates; 4306 assoc_data->supp_rates_len = bss->supp_rates_len; 4307 4308 rcu_read_lock(); 4309 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4310 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4311 assoc_data->ap_ht_param = 4312 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4313 else 4314 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4315 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4316 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4317 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4318 sizeof(struct ieee80211_vht_cap)); 4319 else 4320 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4321 rcu_read_unlock(); 4322 4323 if (bss->wmm_used && bss->uapsd_supported && 4324 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) && 4325 sdata->wmm_acm != 0xff) { 4326 assoc_data->uapsd = true; 4327 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4328 } else { 4329 assoc_data->uapsd = false; 4330 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4331 } 4332 4333 if (req->prev_bssid) 4334 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4335 4336 if (req->use_mfp) { 4337 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4338 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4339 } else { 4340 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4341 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4342 } 4343 4344 if (req->crypto.control_port) 4345 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4346 else 4347 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4348 4349 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4350 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4351 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4352 sdata->vif.type); 4353 4354 /* kick off associate process */ 4355 4356 ifmgd->assoc_data = assoc_data; 4357 ifmgd->dtim_period = 0; 4358 ifmgd->have_beacon = false; 4359 4360 err = ieee80211_prep_connection(sdata, req->bss, true); 4361 if (err) 4362 goto err_clear; 4363 4364 rcu_read_lock(); 4365 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4366 4367 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC && 4368 !beacon_ies) { 4369 /* 4370 * Wait up to one beacon interval ... 4371 * should this be more if we miss one? 4372 */ 4373 sdata_info(sdata, "waiting for beacon from %pM\n", 4374 ifmgd->bssid); 4375 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4376 assoc_data->timeout_started = true; 4377 assoc_data->need_beacon = true; 4378 } else if (beacon_ies) { 4379 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4380 beacon_ies->data, 4381 beacon_ies->len); 4382 u8 dtim_count = 0; 4383 4384 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4385 const struct ieee80211_tim_ie *tim; 4386 tim = (void *)(tim_ie + 2); 4387 ifmgd->dtim_period = tim->dtim_period; 4388 dtim_count = tim->dtim_count; 4389 } 4390 ifmgd->have_beacon = true; 4391 assoc_data->timeout = jiffies; 4392 assoc_data->timeout_started = true; 4393 4394 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { 4395 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4396 sdata->vif.bss_conf.sync_device_ts = 4397 bss->device_ts_beacon; 4398 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4399 } 4400 } else { 4401 assoc_data->timeout = jiffies; 4402 assoc_data->timeout_started = true; 4403 } 4404 rcu_read_unlock(); 4405 4406 run_again(sdata, assoc_data->timeout); 4407 4408 if (bss->corrupt_data) { 4409 char *corrupt_type = "data"; 4410 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4411 if (bss->corrupt_data & 4412 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4413 corrupt_type = "beacon and probe response"; 4414 else 4415 corrupt_type = "beacon"; 4416 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4417 corrupt_type = "probe response"; 4418 sdata_info(sdata, "associating with AP with corrupt %s\n", 4419 corrupt_type); 4420 } 4421 4422 return 0; 4423 err_clear: 4424 memset(ifmgd->bssid, 0, ETH_ALEN); 4425 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4426 ifmgd->assoc_data = NULL; 4427 err_free: 4428 kfree(assoc_data); 4429 return err; 4430 } 4431 4432 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4433 struct cfg80211_deauth_request *req) 4434 { 4435 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4436 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4437 bool tx = !req->local_state_change; 4438 4439 if (ifmgd->auth_data && 4440 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4441 sdata_info(sdata, 4442 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4443 req->bssid, req->reason_code, 4444 ieee80211_get_reason_code_string(req->reason_code)); 4445 4446 drv_mgd_prepare_tx(sdata->local, sdata); 4447 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4448 IEEE80211_STYPE_DEAUTH, 4449 req->reason_code, tx, 4450 frame_buf); 4451 ieee80211_destroy_auth_data(sdata, false); 4452 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4453 IEEE80211_DEAUTH_FRAME_LEN); 4454 4455 return 0; 4456 } 4457 4458 if (ifmgd->associated && 4459 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 4460 sdata_info(sdata, 4461 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 4462 req->bssid, req->reason_code, 4463 ieee80211_get_reason_code_string(req->reason_code)); 4464 4465 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4466 req->reason_code, tx, frame_buf); 4467 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4468 IEEE80211_DEAUTH_FRAME_LEN); 4469 return 0; 4470 } 4471 4472 return -ENOTCONN; 4473 } 4474 4475 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 4476 struct cfg80211_disassoc_request *req) 4477 { 4478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4479 u8 bssid[ETH_ALEN]; 4480 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4481 4482 /* 4483 * cfg80211 should catch this ... but it's racy since 4484 * we can receive a disassoc frame, process it, hand it 4485 * to cfg80211 while that's in a locked section already 4486 * trying to tell us that the user wants to disconnect. 4487 */ 4488 if (ifmgd->associated != req->bss) 4489 return -ENOLINK; 4490 4491 sdata_info(sdata, 4492 "disassociating from %pM by local choice (Reason: %u=%s)\n", 4493 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 4494 4495 memcpy(bssid, req->bss->bssid, ETH_ALEN); 4496 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 4497 req->reason_code, !req->local_state_change, 4498 frame_buf); 4499 4500 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4501 IEEE80211_DEAUTH_FRAME_LEN); 4502 4503 return 0; 4504 } 4505 4506 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 4507 { 4508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4509 4510 /* 4511 * Make sure some work items will not run after this, 4512 * they will not do anything but might not have been 4513 * cancelled when disconnecting. 4514 */ 4515 cancel_work_sync(&ifmgd->monitor_work); 4516 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 4517 cancel_work_sync(&ifmgd->request_smps_work); 4518 cancel_work_sync(&ifmgd->csa_connection_drop_work); 4519 cancel_work_sync(&ifmgd->chswitch_work); 4520 4521 sdata_lock(sdata); 4522 if (ifmgd->assoc_data) { 4523 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4524 ieee80211_destroy_assoc_data(sdata, false); 4525 cfg80211_assoc_timeout(sdata->dev, bss); 4526 } 4527 if (ifmgd->auth_data) 4528 ieee80211_destroy_auth_data(sdata, false); 4529 del_timer_sync(&ifmgd->timer); 4530 sdata_unlock(sdata); 4531 } 4532 4533 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 4534 enum nl80211_cqm_rssi_threshold_event rssi_event, 4535 gfp_t gfp) 4536 { 4537 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4538 4539 trace_api_cqm_rssi_notify(sdata, rssi_event); 4540 4541 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); 4542 } 4543 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 4544