ieee802_11.c revision 3c4793790bf06f1fe08a2ddf604c9caa855151f1
1/* 2 * hostapd / IEEE 802.11 Management 3 * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#ifndef CONFIG_NATIVE_WINDOWS 12 13#include "utils/common.h" 14#include "utils/eloop.h" 15#include "crypto/crypto.h" 16#include "crypto/sha256.h" 17#include "crypto/random.h" 18#include "common/ieee802_11_defs.h" 19#include "common/ieee802_11_common.h" 20#include "common/wpa_ctrl.h" 21#include "common/sae.h" 22#include "radius/radius.h" 23#include "radius/radius_client.h" 24#include "p2p/p2p.h" 25#include "wps/wps.h" 26#include "hostapd.h" 27#include "beacon.h" 28#include "ieee802_11_auth.h" 29#include "sta_info.h" 30#include "ieee802_1x.h" 31#include "wpa_auth.h" 32#include "wmm.h" 33#include "ap_list.h" 34#include "accounting.h" 35#include "ap_config.h" 36#include "ap_mlme.h" 37#include "p2p_hostapd.h" 38#include "ap_drv_ops.h" 39#include "wnm_ap.h" 40#include "ieee802_11.h" 41 42 43u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid) 44{ 45 u8 *pos = eid; 46 int i, num, count; 47 48 if (hapd->iface->current_rates == NULL) 49 return eid; 50 51 *pos++ = WLAN_EID_SUPP_RATES; 52 num = hapd->iface->num_rates; 53 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) 54 num++; 55 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) 56 num++; 57 if (num > 8) { 58 /* rest of the rates are encoded in Extended supported 59 * rates element */ 60 num = 8; 61 } 62 63 *pos++ = num; 64 count = 0; 65 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num; 66 i++) { 67 count++; 68 *pos = hapd->iface->current_rates[i].rate / 5; 69 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) 70 *pos |= 0x80; 71 pos++; 72 } 73 74 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) { 75 count++; 76 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; 77 } 78 79 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) { 80 count++; 81 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY; 82 } 83 84 return pos; 85} 86 87 88u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid) 89{ 90 u8 *pos = eid; 91 int i, num, count; 92 93 if (hapd->iface->current_rates == NULL) 94 return eid; 95 96 num = hapd->iface->num_rates; 97 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) 98 num++; 99 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) 100 num++; 101 if (num <= 8) 102 return eid; 103 num -= 8; 104 105 *pos++ = WLAN_EID_EXT_SUPP_RATES; 106 *pos++ = num; 107 count = 0; 108 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8; 109 i++) { 110 count++; 111 if (count <= 8) 112 continue; /* already in SuppRates IE */ 113 *pos = hapd->iface->current_rates[i].rate / 5; 114 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) 115 *pos |= 0x80; 116 pos++; 117 } 118 119 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) { 120 count++; 121 if (count > 8) 122 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; 123 } 124 125 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) { 126 count++; 127 if (count > 8) 128 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY; 129 } 130 131 return pos; 132} 133 134 135u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta, 136 int probe) 137{ 138 int capab = WLAN_CAPABILITY_ESS; 139 int privacy; 140 141 if (hapd->iface->num_sta_no_short_preamble == 0 && 142 hapd->iconf->preamble == SHORT_PREAMBLE) 143 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 144 145 privacy = hapd->conf->ssid.wep.keys_set; 146 147 if (hapd->conf->ieee802_1x && 148 (hapd->conf->default_wep_key_len || 149 hapd->conf->individual_wep_key_len)) 150 privacy = 1; 151 152 if (hapd->conf->wpa) 153 privacy = 1; 154 155 if (sta) { 156 int policy, def_klen; 157 if (probe && sta->ssid_probe) { 158 policy = sta->ssid_probe->security_policy; 159 def_klen = sta->ssid_probe->wep.default_len; 160 } else { 161 policy = sta->ssid->security_policy; 162 def_klen = sta->ssid->wep.default_len; 163 } 164 privacy = policy != SECURITY_PLAINTEXT; 165 if (policy == SECURITY_IEEE_802_1X && def_klen == 0) 166 privacy = 0; 167 } 168 169 if (privacy) 170 capab |= WLAN_CAPABILITY_PRIVACY; 171 172 if (hapd->iface->current_mode && 173 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && 174 hapd->iface->num_sta_no_short_slot_time == 0) 175 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 176 177 return capab; 178} 179 180 181static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta, 182 u16 auth_transaction, const u8 *challenge, 183 int iswep) 184{ 185 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 186 HOSTAPD_LEVEL_DEBUG, 187 "authentication (shared key, transaction %d)", 188 auth_transaction); 189 190 if (auth_transaction == 1) { 191 if (!sta->challenge) { 192 /* Generate a pseudo-random challenge */ 193 u8 key[8]; 194 struct os_time now; 195 int r; 196 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN); 197 if (sta->challenge == NULL) 198 return WLAN_STATUS_UNSPECIFIED_FAILURE; 199 200 os_get_time(&now); 201 r = os_random(); 202 os_memcpy(key, &now.sec, 4); 203 os_memcpy(key + 4, &r, 4); 204 rc4_skip(key, sizeof(key), 0, 205 sta->challenge, WLAN_AUTH_CHALLENGE_LEN); 206 } 207 return 0; 208 } 209 210 if (auth_transaction != 3) 211 return WLAN_STATUS_UNSPECIFIED_FAILURE; 212 213 /* Transaction 3 */ 214 if (!iswep || !sta->challenge || !challenge || 215 os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) { 216 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 217 HOSTAPD_LEVEL_INFO, 218 "shared key authentication - invalid " 219 "challenge-response"); 220 return WLAN_STATUS_CHALLENGE_FAIL; 221 } 222 223 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 224 HOSTAPD_LEVEL_DEBUG, 225 "authentication OK (shared key)"); 226 sta->flags |= WLAN_STA_AUTH; 227 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 228 os_free(sta->challenge); 229 sta->challenge = NULL; 230 231 return 0; 232} 233 234 235static void send_auth_reply(struct hostapd_data *hapd, 236 const u8 *dst, const u8 *bssid, 237 u16 auth_alg, u16 auth_transaction, u16 resp, 238 const u8 *ies, size_t ies_len) 239{ 240 struct ieee80211_mgmt *reply; 241 u8 *buf; 242 size_t rlen; 243 244 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len; 245 buf = os_zalloc(rlen); 246 if (buf == NULL) 247 return; 248 249 reply = (struct ieee80211_mgmt *) buf; 250 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 251 WLAN_FC_STYPE_AUTH); 252 os_memcpy(reply->da, dst, ETH_ALEN); 253 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 254 os_memcpy(reply->bssid, bssid, ETH_ALEN); 255 256 reply->u.auth.auth_alg = host_to_le16(auth_alg); 257 reply->u.auth.auth_transaction = host_to_le16(auth_transaction); 258 reply->u.auth.status_code = host_to_le16(resp); 259 260 if (ies && ies_len) 261 os_memcpy(reply->u.auth.variable, ies, ies_len); 262 263 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR 264 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)", 265 MAC2STR(dst), auth_alg, auth_transaction, 266 resp, (unsigned long) ies_len); 267 if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0) 268 wpa_printf(MSG_INFO, "send_auth_reply: send"); 269 270 os_free(buf); 271} 272 273 274#ifdef CONFIG_IEEE80211R 275static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid, 276 u16 auth_transaction, u16 status, 277 const u8 *ies, size_t ies_len) 278{ 279 struct hostapd_data *hapd = ctx; 280 struct sta_info *sta; 281 282 send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction, 283 status, ies, ies_len); 284 285 if (status != WLAN_STATUS_SUCCESS) 286 return; 287 288 sta = ap_get_sta(hapd, dst); 289 if (sta == NULL) 290 return; 291 292 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211, 293 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)"); 294 sta->flags |= WLAN_STA_AUTH; 295 mlme_authenticate_indication(hapd, sta); 296} 297#endif /* CONFIG_IEEE80211R */ 298 299 300#ifdef CONFIG_SAE 301 302static struct wpabuf * auth_process_sae_commit(struct hostapd_data *hapd, 303 struct sta_info *sta) 304{ 305 struct wpabuf *buf; 306 307 if (hapd->conf->ssid.wpa_passphrase == NULL) { 308 wpa_printf(MSG_DEBUG, "SAE: No password available"); 309 return NULL; 310 } 311 312 if (sae_prepare_commit(hapd->own_addr, sta->addr, 313 (u8 *) hapd->conf->ssid.wpa_passphrase, 314 os_strlen(hapd->conf->ssid.wpa_passphrase), 315 sta->sae) < 0) { 316 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); 317 return NULL; 318 } 319 320 if (sae_process_commit(sta->sae) < 0) { 321 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer commit"); 322 return NULL; 323 } 324 325 buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN); 326 if (buf == NULL) 327 return NULL; 328 sae_write_commit(sta->sae, buf, NULL); 329 330 return buf; 331} 332 333 334static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd, 335 struct sta_info *sta) 336{ 337 struct wpabuf *buf; 338 339 buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN); 340 if (buf == NULL) 341 return NULL; 342 343 sae_write_confirm(sta->sae, buf); 344 345 return buf; 346} 347 348 349static int use_sae_anti_clogging(struct hostapd_data *hapd) 350{ 351 struct sta_info *sta; 352 unsigned int open = 0; 353 354 if (hapd->conf->sae_anti_clogging_threshold == 0) 355 return 1; 356 357 for (sta = hapd->sta_list; sta; sta = sta->next) { 358 if (!sta->sae) 359 continue; 360 if (sta->sae->state != SAE_COMMITTED && 361 sta->sae->state != SAE_CONFIRMED) 362 continue; 363 open++; 364 if (open >= hapd->conf->sae_anti_clogging_threshold) 365 return 1; 366 } 367 368 return 0; 369} 370 371 372static int check_sae_token(struct hostapd_data *hapd, const u8 *addr, 373 const u8 *token, size_t token_len) 374{ 375 u8 mac[SHA256_MAC_LEN]; 376 377 if (token_len != SHA256_MAC_LEN) 378 return -1; 379 if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), 380 addr, ETH_ALEN, mac) < 0 || 381 os_memcmp(token, mac, SHA256_MAC_LEN) != 0) 382 return -1; 383 384 return 0; 385} 386 387 388static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd, 389 const u8 *addr) 390{ 391 struct wpabuf *buf; 392 u8 *token; 393 struct os_reltime now; 394 395 os_get_reltime(&now); 396 if (!os_reltime_initialized(&hapd->last_sae_token_key_update) || 397 os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) { 398 if (random_get_bytes(hapd->sae_token_key, 399 sizeof(hapd->sae_token_key)) < 0) 400 return NULL; 401 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key", 402 hapd->sae_token_key, sizeof(hapd->sae_token_key)); 403 hapd->last_sae_token_key_update = now; 404 } 405 406 buf = wpabuf_alloc(SHA256_MAC_LEN); 407 if (buf == NULL) 408 return NULL; 409 410 token = wpabuf_put(buf, SHA256_MAC_LEN); 411 hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), 412 addr, ETH_ALEN, token); 413 414 return buf; 415} 416 417 418static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta, 419 const struct ieee80211_mgmt *mgmt, size_t len, 420 u8 auth_transaction) 421{ 422 u16 resp = WLAN_STATUS_SUCCESS; 423 struct wpabuf *data = NULL; 424 425 if (!sta->sae) { 426 if (auth_transaction != 1) 427 return; 428 sta->sae = os_zalloc(sizeof(*sta->sae)); 429 if (sta->sae == NULL) 430 return; 431 sta->sae->state = SAE_NOTHING; 432 } 433 434 if (auth_transaction == 1) { 435 const u8 *token = NULL; 436 size_t token_len = 0; 437 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 438 HOSTAPD_LEVEL_DEBUG, 439 "start SAE authentication (RX commit)"); 440 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable, 441 ((const u8 *) mgmt) + len - 442 mgmt->u.auth.variable, &token, 443 &token_len, hapd->conf->sae_groups); 444 if (token && check_sae_token(hapd, sta->addr, token, token_len) 445 < 0) { 446 wpa_printf(MSG_DEBUG, "SAE: Drop commit message with " 447 "incorrect token from " MACSTR, 448 MAC2STR(sta->addr)); 449 return; 450 } 451 452 if (resp == WLAN_STATUS_SUCCESS) { 453 if (!token && use_sae_anti_clogging(hapd)) { 454 wpa_printf(MSG_DEBUG, "SAE: Request anti-" 455 "clogging token from " MACSTR, 456 MAC2STR(sta->addr)); 457 data = auth_build_token_req(hapd, sta->addr); 458 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ; 459 } else { 460 data = auth_process_sae_commit(hapd, sta); 461 if (data == NULL) 462 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 463 else 464 sta->sae->state = SAE_COMMITTED; 465 } 466 } 467 } else if (auth_transaction == 2) { 468 if (sta->sae->state != SAE_COMMITTED) { 469 hostapd_logger(hapd, sta->addr, 470 HOSTAPD_MODULE_IEEE80211, 471 HOSTAPD_LEVEL_DEBUG, 472 "SAE confirm before commit"); 473 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 474 } 475 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 476 HOSTAPD_LEVEL_DEBUG, 477 "SAE authentication (RX confirm)"); 478 if (sae_check_confirm(sta->sae, mgmt->u.auth.variable, 479 ((u8 *) mgmt) + len - 480 mgmt->u.auth.variable) < 0) { 481 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 482 } else { 483 resp = WLAN_STATUS_SUCCESS; 484 sta->flags |= WLAN_STA_AUTH; 485 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 486 sta->auth_alg = WLAN_AUTH_SAE; 487 mlme_authenticate_indication(hapd, sta); 488 489 data = auth_build_sae_confirm(hapd, sta); 490 if (data == NULL) 491 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 492 else { 493 sta->sae->state = SAE_ACCEPTED; 494 sae_clear_temp_data(sta->sae); 495 } 496 } 497 } else { 498 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 499 HOSTAPD_LEVEL_DEBUG, 500 "unexpected SAE authentication transaction %u", 501 auth_transaction); 502 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 503 } 504 505 sta->auth_alg = WLAN_AUTH_SAE; 506 507 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE, 508 auth_transaction, resp, 509 data ? wpabuf_head(data) : (u8 *) "", 510 data ? wpabuf_len(data) : 0); 511 wpabuf_free(data); 512} 513#endif /* CONFIG_SAE */ 514 515 516static void handle_auth(struct hostapd_data *hapd, 517 const struct ieee80211_mgmt *mgmt, size_t len) 518{ 519 u16 auth_alg, auth_transaction, status_code; 520 u16 resp = WLAN_STATUS_SUCCESS; 521 struct sta_info *sta = NULL; 522 int res; 523 u16 fc; 524 const u8 *challenge = NULL; 525 u32 session_timeout, acct_interim_interval; 526 int vlan_id = 0; 527 struct hostapd_sta_wpa_psk_short *psk = NULL; 528 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; 529 size_t resp_ies_len = 0; 530 char *identity = NULL; 531 char *radius_cui = NULL; 532 533 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 534 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)", 535 (unsigned long) len); 536 return; 537 } 538 539#ifdef CONFIG_TESTING_OPTIONS 540 if (hapd->iconf->ignore_auth_probability > 0.0d && 541 drand48() < hapd->iconf->ignore_auth_probability) { 542 wpa_printf(MSG_INFO, 543 "TESTING: ignoring auth frame from " MACSTR, 544 MAC2STR(mgmt->sa)); 545 return; 546 } 547#endif /* CONFIG_TESTING_OPTIONS */ 548 549 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 550 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 551 status_code = le_to_host16(mgmt->u.auth.status_code); 552 fc = le_to_host16(mgmt->frame_control); 553 554 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 555 2 + WLAN_AUTH_CHALLENGE_LEN && 556 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE && 557 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN) 558 challenge = &mgmt->u.auth.variable[2]; 559 560 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d " 561 "auth_transaction=%d status_code=%d wep=%d%s", 562 MAC2STR(mgmt->sa), auth_alg, auth_transaction, 563 status_code, !!(fc & WLAN_FC_ISWEP), 564 challenge ? " challenge" : ""); 565 566 if (hapd->tkip_countermeasures) { 567 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 568 goto fail; 569 } 570 571 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) && 572 auth_alg == WLAN_AUTH_OPEN) || 573#ifdef CONFIG_IEEE80211R 574 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && 575 auth_alg == WLAN_AUTH_FT) || 576#endif /* CONFIG_IEEE80211R */ 577#ifdef CONFIG_SAE 578 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) && 579 auth_alg == WLAN_AUTH_SAE) || 580#endif /* CONFIG_SAE */ 581 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) && 582 auth_alg == WLAN_AUTH_SHARED_KEY))) { 583 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)", 584 auth_alg); 585 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 586 goto fail; 587 } 588 589 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE || 590 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) { 591 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)", 592 auth_transaction); 593 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 594 goto fail; 595 } 596 597 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { 598 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", 599 MAC2STR(mgmt->sa)); 600 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 601 goto fail; 602 } 603 604 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len, 605 &session_timeout, 606 &acct_interim_interval, &vlan_id, 607 &psk, &identity, &radius_cui); 608 609 if (res == HOSTAPD_ACL_REJECT) { 610 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", 611 MAC2STR(mgmt->sa)); 612 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 613 goto fail; 614 } 615 if (res == HOSTAPD_ACL_PENDING) { 616 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR 617 " waiting for an external authentication", 618 MAC2STR(mgmt->sa)); 619 /* Authentication code will re-send the authentication frame 620 * after it has received (and cached) information from the 621 * external source. */ 622 return; 623 } 624 625 sta = ap_sta_add(hapd, mgmt->sa); 626 if (!sta) { 627 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 628 goto fail; 629 } 630 631 if (vlan_id > 0) { 632 if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) { 633 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 634 HOSTAPD_LEVEL_INFO, "Invalid VLAN ID " 635 "%d received from RADIUS server", 636 vlan_id); 637 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 638 goto fail; 639 } 640 sta->vlan_id = vlan_id; 641 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 642 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); 643 } 644 645 hostapd_free_psk_list(sta->psk); 646 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) { 647 sta->psk = psk; 648 psk = NULL; 649 } else { 650 sta->psk = NULL; 651 } 652 653 sta->identity = identity; 654 identity = NULL; 655 sta->radius_cui = radius_cui; 656 radius_cui = NULL; 657 658 sta->flags &= ~WLAN_STA_PREAUTH; 659 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); 660 661 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval) 662 sta->acct_interim_interval = acct_interim_interval; 663 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) 664 ap_sta_session_timeout(hapd, sta, session_timeout); 665 else 666 ap_sta_no_session_timeout(hapd, sta); 667 668 switch (auth_alg) { 669 case WLAN_AUTH_OPEN: 670 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 671 HOSTAPD_LEVEL_DEBUG, 672 "authentication OK (open system)"); 673 sta->flags |= WLAN_STA_AUTH; 674 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 675 sta->auth_alg = WLAN_AUTH_OPEN; 676 mlme_authenticate_indication(hapd, sta); 677 break; 678 case WLAN_AUTH_SHARED_KEY: 679 resp = auth_shared_key(hapd, sta, auth_transaction, challenge, 680 fc & WLAN_FC_ISWEP); 681 sta->auth_alg = WLAN_AUTH_SHARED_KEY; 682 mlme_authenticate_indication(hapd, sta); 683 if (sta->challenge && auth_transaction == 1) { 684 resp_ies[0] = WLAN_EID_CHALLENGE; 685 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN; 686 os_memcpy(resp_ies + 2, sta->challenge, 687 WLAN_AUTH_CHALLENGE_LEN); 688 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN; 689 } 690 break; 691#ifdef CONFIG_IEEE80211R 692 case WLAN_AUTH_FT: 693 sta->auth_alg = WLAN_AUTH_FT; 694 if (sta->wpa_sm == NULL) 695 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 696 sta->addr, NULL); 697 if (sta->wpa_sm == NULL) { 698 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " 699 "state machine"); 700 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 701 goto fail; 702 } 703 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid, 704 auth_transaction, mgmt->u.auth.variable, 705 len - IEEE80211_HDRLEN - 706 sizeof(mgmt->u.auth), 707 handle_auth_ft_finish, hapd); 708 /* handle_auth_ft_finish() callback will complete auth. */ 709 return; 710#endif /* CONFIG_IEEE80211R */ 711#ifdef CONFIG_SAE 712 case WLAN_AUTH_SAE: 713 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction); 714 return; 715#endif /* CONFIG_SAE */ 716 } 717 718 fail: 719 os_free(identity); 720 os_free(radius_cui); 721 hostapd_free_psk_list(psk); 722 723 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg, 724 auth_transaction + 1, resp, resp_ies, resp_ies_len); 725} 726 727 728static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta) 729{ 730 int i, j = 32, aid; 731 732 /* get a unique AID */ 733 if (sta->aid > 0) { 734 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid); 735 return 0; 736 } 737 738 for (i = 0; i < AID_WORDS; i++) { 739 if (hapd->sta_aid[i] == (u32) -1) 740 continue; 741 for (j = 0; j < 32; j++) { 742 if (!(hapd->sta_aid[i] & BIT(j))) 743 break; 744 } 745 if (j < 32) 746 break; 747 } 748 if (j == 32) 749 return -1; 750 aid = i * 32 + j + 1; 751 if (aid > 2007) 752 return -1; 753 754 sta->aid = aid; 755 hapd->sta_aid[i] |= BIT(j); 756 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid); 757 return 0; 758} 759 760 761static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta, 762 const u8 *ssid_ie, size_t ssid_ie_len) 763{ 764 if (ssid_ie == NULL) 765 return WLAN_STATUS_UNSPECIFIED_FAILURE; 766 767 if (ssid_ie_len != hapd->conf->ssid.ssid_len || 768 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) { 769 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 770 HOSTAPD_LEVEL_INFO, 771 "Station tried to associate with unknown SSID " 772 "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len)); 773 return WLAN_STATUS_UNSPECIFIED_FAILURE; 774 } 775 776 return WLAN_STATUS_SUCCESS; 777} 778 779 780static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta, 781 const u8 *wmm_ie, size_t wmm_ie_len) 782{ 783 sta->flags &= ~WLAN_STA_WMM; 784 sta->qosinfo = 0; 785 if (wmm_ie && hapd->conf->wmm_enabled) { 786 struct wmm_information_element *wmm; 787 788 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) { 789 hostapd_logger(hapd, sta->addr, 790 HOSTAPD_MODULE_WPA, 791 HOSTAPD_LEVEL_DEBUG, 792 "invalid WMM element in association " 793 "request"); 794 return WLAN_STATUS_UNSPECIFIED_FAILURE; 795 } 796 797 sta->flags |= WLAN_STA_WMM; 798 wmm = (struct wmm_information_element *) wmm_ie; 799 sta->qosinfo = wmm->qos_info; 800 } 801 return WLAN_STATUS_SUCCESS; 802} 803 804 805static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta, 806 struct ieee802_11_elems *elems) 807{ 808 if (!elems->supp_rates) { 809 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 810 HOSTAPD_LEVEL_DEBUG, 811 "No supported rates element in AssocReq"); 812 return WLAN_STATUS_UNSPECIFIED_FAILURE; 813 } 814 815 if (elems->supp_rates_len + elems->ext_supp_rates_len > 816 sizeof(sta->supported_rates)) { 817 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 818 HOSTAPD_LEVEL_DEBUG, 819 "Invalid supported rates element length %d+%d", 820 elems->supp_rates_len, 821 elems->ext_supp_rates_len); 822 return WLAN_STATUS_UNSPECIFIED_FAILURE; 823 } 824 825 sta->supported_rates_len = merge_byte_arrays( 826 sta->supported_rates, sizeof(sta->supported_rates), 827 elems->supp_rates, elems->supp_rates_len, 828 elems->ext_supp_rates, elems->ext_supp_rates_len); 829 830 return WLAN_STATUS_SUCCESS; 831} 832 833 834static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta, 835 const u8 *ext_capab_ie, size_t ext_capab_ie_len) 836{ 837#ifdef CONFIG_INTERWORKING 838 /* check for QoS Map support */ 839 if (ext_capab_ie_len >= 5) { 840 if (ext_capab_ie[4] & 0x01) 841 sta->qos_map_enabled = 1; 842 } 843#endif /* CONFIG_INTERWORKING */ 844 845 return WLAN_STATUS_SUCCESS; 846} 847 848 849static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, 850 const u8 *ies, size_t ies_len, int reassoc) 851{ 852 struct ieee802_11_elems elems; 853 u16 resp; 854 const u8 *wpa_ie; 855 size_t wpa_ie_len; 856 const u8 *p2p_dev_addr = NULL; 857 858 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { 859 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 860 HOSTAPD_LEVEL_INFO, "Station sent an invalid " 861 "association request"); 862 return WLAN_STATUS_UNSPECIFIED_FAILURE; 863 } 864 865 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len); 866 if (resp != WLAN_STATUS_SUCCESS) 867 return resp; 868 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len); 869 if (resp != WLAN_STATUS_SUCCESS) 870 return resp; 871 resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len); 872 if (resp != WLAN_STATUS_SUCCESS) 873 return resp; 874 resp = copy_supp_rates(hapd, sta, &elems); 875 if (resp != WLAN_STATUS_SUCCESS) 876 return resp; 877#ifdef CONFIG_IEEE80211N 878 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities, 879 elems.ht_capabilities_len); 880 if (resp != WLAN_STATUS_SUCCESS) 881 return resp; 882 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && 883 !(sta->flags & WLAN_STA_HT)) { 884 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 885 HOSTAPD_LEVEL_INFO, "Station does not support " 886 "mandatory HT PHY - reject association"); 887 return WLAN_STATUS_ASSOC_DENIED_NO_HT; 888 } 889#endif /* CONFIG_IEEE80211N */ 890 891#ifdef CONFIG_IEEE80211AC 892 resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities, 893 elems.vht_capabilities_len); 894 if (resp != WLAN_STATUS_SUCCESS) 895 return resp; 896 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && 897 !(sta->flags & WLAN_STA_VHT)) { 898 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 899 HOSTAPD_LEVEL_INFO, "Station does not support " 900 "mandatory VHT PHY - reject association"); 901 return WLAN_STATUS_ASSOC_DENIED_NO_VHT; 902 } 903#endif /* CONFIG_IEEE80211AC */ 904 905#ifdef CONFIG_P2P 906 if (elems.p2p) { 907 wpabuf_free(sta->p2p_ie); 908 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 909 P2P_IE_VENDOR_TYPE); 910 if (sta->p2p_ie) 911 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie); 912 } else { 913 wpabuf_free(sta->p2p_ie); 914 sta->p2p_ie = NULL; 915 } 916#endif /* CONFIG_P2P */ 917 918 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { 919 wpa_ie = elems.rsn_ie; 920 wpa_ie_len = elems.rsn_ie_len; 921 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) && 922 elems.wpa_ie) { 923 wpa_ie = elems.wpa_ie; 924 wpa_ie_len = elems.wpa_ie_len; 925 } else { 926 wpa_ie = NULL; 927 wpa_ie_len = 0; 928 } 929 930#ifdef CONFIG_WPS 931 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2); 932 if (hapd->conf->wps_state && elems.wps_ie) { 933 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association " 934 "Request - assume WPS is used"); 935 sta->flags |= WLAN_STA_WPS; 936 wpabuf_free(sta->wps_ie); 937 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 938 WPS_IE_VENDOR_TYPE); 939 if (sta->wps_ie && wps_is_20(sta->wps_ie)) { 940 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0"); 941 sta->flags |= WLAN_STA_WPS2; 942 } 943 wpa_ie = NULL; 944 wpa_ie_len = 0; 945 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) { 946 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in " 947 "(Re)Association Request - reject"); 948 return WLAN_STATUS_INVALID_IE; 949 } 950 } else if (hapd->conf->wps_state && wpa_ie == NULL) { 951 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in " 952 "(Re)Association Request - possible WPS use"); 953 sta->flags |= WLAN_STA_MAYBE_WPS; 954 } else 955#endif /* CONFIG_WPS */ 956 if (hapd->conf->wpa && wpa_ie == NULL) { 957 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 958 HOSTAPD_LEVEL_INFO, 959 "No WPA/RSN IE in association request"); 960 return WLAN_STATUS_INVALID_IE; 961 } 962 963 if (hapd->conf->wpa && wpa_ie) { 964 int res; 965 wpa_ie -= 2; 966 wpa_ie_len += 2; 967 if (sta->wpa_sm == NULL) 968 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 969 sta->addr, 970 p2p_dev_addr); 971 if (sta->wpa_sm == NULL) { 972 wpa_printf(MSG_WARNING, "Failed to initialize WPA " 973 "state machine"); 974 return WLAN_STATUS_UNSPECIFIED_FAILURE; 975 } 976 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, 977 wpa_ie, wpa_ie_len, 978 elems.mdie, elems.mdie_len); 979 if (res == WPA_INVALID_GROUP) 980 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; 981 else if (res == WPA_INVALID_PAIRWISE) 982 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; 983 else if (res == WPA_INVALID_AKMP) 984 resp = WLAN_STATUS_AKMP_NOT_VALID; 985 else if (res == WPA_ALLOC_FAIL) 986 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 987#ifdef CONFIG_IEEE80211W 988 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) 989 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 990 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) 991 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 992#endif /* CONFIG_IEEE80211W */ 993 else if (res == WPA_INVALID_MDIE) 994 resp = WLAN_STATUS_INVALID_MDIE; 995 else if (res != WPA_IE_OK) 996 resp = WLAN_STATUS_INVALID_IE; 997 if (resp != WLAN_STATUS_SUCCESS) 998 return resp; 999#ifdef CONFIG_IEEE80211W 1000 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1001 sta->sa_query_count > 0) 1002 ap_check_sa_query_timeout(hapd, sta); 1003 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1004 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) { 1005 /* 1006 * STA has already been associated with MFP and SA 1007 * Query timeout has not been reached. Reject the 1008 * association attempt temporarily and start SA Query, 1009 * if one is not pending. 1010 */ 1011 1012 if (sta->sa_query_count == 0) 1013 ap_sta_start_sa_query(hapd, sta); 1014 1015 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; 1016 } 1017 1018 if (wpa_auth_uses_mfp(sta->wpa_sm)) 1019 sta->flags |= WLAN_STA_MFP; 1020 else 1021 sta->flags &= ~WLAN_STA_MFP; 1022#endif /* CONFIG_IEEE80211W */ 1023 1024#ifdef CONFIG_IEEE80211R 1025 if (sta->auth_alg == WLAN_AUTH_FT) { 1026 if (!reassoc) { 1027 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried " 1028 "to use association (not " 1029 "re-association) with FT auth_alg", 1030 MAC2STR(sta->addr)); 1031 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1032 } 1033 1034 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies, 1035 ies_len); 1036 if (resp != WLAN_STATUS_SUCCESS) 1037 return resp; 1038 } 1039#endif /* CONFIG_IEEE80211R */ 1040 1041#ifdef CONFIG_SAE 1042 if (wpa_auth_uses_sae(sta->wpa_sm) && 1043 sta->auth_alg != WLAN_AUTH_SAE && 1044 !(sta->auth_alg == WLAN_AUTH_FT && 1045 wpa_auth_uses_ft_sae(sta->wpa_sm))) { 1046 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use " 1047 "SAE AKM after non-SAE auth_alg %u", 1048 MAC2STR(sta->addr), sta->auth_alg); 1049 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 1050 } 1051#endif /* CONFIG_SAE */ 1052 1053#ifdef CONFIG_IEEE80211N 1054 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) && 1055 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) { 1056 hostapd_logger(hapd, sta->addr, 1057 HOSTAPD_MODULE_IEEE80211, 1058 HOSTAPD_LEVEL_INFO, 1059 "Station tried to use TKIP with HT " 1060 "association"); 1061 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; 1062 } 1063#endif /* CONFIG_IEEE80211N */ 1064 } else 1065 wpa_auth_sta_no_wpa(sta->wpa_sm); 1066 1067#ifdef CONFIG_P2P 1068 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len); 1069#endif /* CONFIG_P2P */ 1070 1071#ifdef CONFIG_HS20 1072 wpabuf_free(sta->hs20_ie); 1073 if (elems.hs20 && elems.hs20_len > 4) { 1074 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4, 1075 elems.hs20_len - 4); 1076 } else 1077 sta->hs20_ie = NULL; 1078#endif /* CONFIG_HS20 */ 1079 1080 return WLAN_STATUS_SUCCESS; 1081} 1082 1083 1084static void send_deauth(struct hostapd_data *hapd, const u8 *addr, 1085 u16 reason_code) 1086{ 1087 int send_len; 1088 struct ieee80211_mgmt reply; 1089 1090 os_memset(&reply, 0, sizeof(reply)); 1091 reply.frame_control = 1092 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); 1093 os_memcpy(reply.da, addr, ETH_ALEN); 1094 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN); 1095 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN); 1096 1097 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth); 1098 reply.u.deauth.reason_code = host_to_le16(reason_code); 1099 1100 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0) 1101 wpa_printf(MSG_INFO, "Failed to send deauth: %s", 1102 strerror(errno)); 1103} 1104 1105 1106static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta, 1107 u16 status_code, int reassoc, const u8 *ies, 1108 size_t ies_len) 1109{ 1110 int send_len; 1111 u8 buf[sizeof(struct ieee80211_mgmt) + 1024]; 1112 struct ieee80211_mgmt *reply; 1113 u8 *p; 1114 1115 os_memset(buf, 0, sizeof(buf)); 1116 reply = (struct ieee80211_mgmt *) buf; 1117 reply->frame_control = 1118 IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1119 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP : 1120 WLAN_FC_STYPE_ASSOC_RESP)); 1121 os_memcpy(reply->da, sta->addr, ETH_ALEN); 1122 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 1123 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN); 1124 1125 send_len = IEEE80211_HDRLEN; 1126 send_len += sizeof(reply->u.assoc_resp); 1127 reply->u.assoc_resp.capab_info = 1128 host_to_le16(hostapd_own_capab_info(hapd, sta, 0)); 1129 reply->u.assoc_resp.status_code = host_to_le16(status_code); 1130 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) 1131 | BIT(14) | BIT(15)); 1132 /* Supported rates */ 1133 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable); 1134 /* Extended supported rates */ 1135 p = hostapd_eid_ext_supp_rates(hapd, p); 1136 1137#ifdef CONFIG_IEEE80211R 1138 if (status_code == WLAN_STATUS_SUCCESS) { 1139 /* IEEE 802.11r: Mobility Domain Information, Fast BSS 1140 * Transition Information, RSN, [RIC Response] */ 1141 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p, 1142 buf + sizeof(buf) - p, 1143 sta->auth_alg, ies, ies_len); 1144 } 1145#endif /* CONFIG_IEEE80211R */ 1146 1147#ifdef CONFIG_IEEE80211W 1148 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) 1149 p = hostapd_eid_assoc_comeback_time(hapd, sta, p); 1150#endif /* CONFIG_IEEE80211W */ 1151 1152#ifdef CONFIG_IEEE80211N 1153 p = hostapd_eid_ht_capabilities(hapd, p); 1154 p = hostapd_eid_ht_operation(hapd, p); 1155#endif /* CONFIG_IEEE80211N */ 1156 1157#ifdef CONFIG_IEEE80211AC 1158 p = hostapd_eid_vht_capabilities(hapd, p); 1159 p = hostapd_eid_vht_operation(hapd, p); 1160#endif /* CONFIG_IEEE80211AC */ 1161 1162 p = hostapd_eid_ext_capab(hapd, p); 1163 p = hostapd_eid_bss_max_idle_period(hapd, p); 1164 if (sta->qos_map_enabled) 1165 p = hostapd_eid_qos_map_set(hapd, p); 1166 1167 if (sta->flags & WLAN_STA_WMM) 1168 p = hostapd_eid_wmm(hapd, p); 1169 1170#ifdef CONFIG_WPS 1171 if ((sta->flags & WLAN_STA_WPS) || 1172 ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) { 1173 struct wpabuf *wps = wps_build_assoc_resp_ie(); 1174 if (wps) { 1175 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps)); 1176 p += wpabuf_len(wps); 1177 wpabuf_free(wps); 1178 } 1179 } 1180#endif /* CONFIG_WPS */ 1181 1182#ifdef CONFIG_P2P 1183 if (sta->p2p_ie) { 1184 struct wpabuf *p2p_resp_ie; 1185 enum p2p_status_code status; 1186 switch (status_code) { 1187 case WLAN_STATUS_SUCCESS: 1188 status = P2P_SC_SUCCESS; 1189 break; 1190 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA: 1191 status = P2P_SC_FAIL_LIMIT_REACHED; 1192 break; 1193 default: 1194 status = P2P_SC_FAIL_INVALID_PARAMS; 1195 break; 1196 } 1197 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status); 1198 if (p2p_resp_ie) { 1199 os_memcpy(p, wpabuf_head(p2p_resp_ie), 1200 wpabuf_len(p2p_resp_ie)); 1201 p += wpabuf_len(p2p_resp_ie); 1202 wpabuf_free(p2p_resp_ie); 1203 } 1204 } 1205#endif /* CONFIG_P2P */ 1206 1207#ifdef CONFIG_P2P_MANAGER 1208 if (hapd->conf->p2p & P2P_MANAGE) 1209 p = hostapd_eid_p2p_manage(hapd, p); 1210#endif /* CONFIG_P2P_MANAGER */ 1211 1212 send_len += p - reply->u.assoc_resp.variable; 1213 1214 if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0) 1215 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s", 1216 strerror(errno)); 1217} 1218 1219 1220static void handle_assoc(struct hostapd_data *hapd, 1221 const struct ieee80211_mgmt *mgmt, size_t len, 1222 int reassoc) 1223{ 1224 u16 capab_info, listen_interval; 1225 u16 resp = WLAN_STATUS_SUCCESS; 1226 const u8 *pos; 1227 int left, i; 1228 struct sta_info *sta; 1229 1230 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) : 1231 sizeof(mgmt->u.assoc_req))) { 1232 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)", 1233 reassoc, (unsigned long) len); 1234 return; 1235 } 1236 1237#ifdef CONFIG_TESTING_OPTIONS 1238 if (reassoc) { 1239 if (hapd->iconf->ignore_reassoc_probability > 0.0d && 1240 drand48() < hapd->iconf->ignore_reassoc_probability) { 1241 wpa_printf(MSG_INFO, 1242 "TESTING: ignoring reassoc request from " 1243 MACSTR, MAC2STR(mgmt->sa)); 1244 return; 1245 } 1246 } else { 1247 if (hapd->iconf->ignore_assoc_probability > 0.0d && 1248 drand48() < hapd->iconf->ignore_assoc_probability) { 1249 wpa_printf(MSG_INFO, 1250 "TESTING: ignoring assoc request from " 1251 MACSTR, MAC2STR(mgmt->sa)); 1252 return; 1253 } 1254 } 1255#endif /* CONFIG_TESTING_OPTIONS */ 1256 1257 if (reassoc) { 1258 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info); 1259 listen_interval = le_to_host16( 1260 mgmt->u.reassoc_req.listen_interval); 1261 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR 1262 " capab_info=0x%02x listen_interval=%d current_ap=" 1263 MACSTR, 1264 MAC2STR(mgmt->sa), capab_info, listen_interval, 1265 MAC2STR(mgmt->u.reassoc_req.current_ap)); 1266 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req)); 1267 pos = mgmt->u.reassoc_req.variable; 1268 } else { 1269 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info); 1270 listen_interval = le_to_host16( 1271 mgmt->u.assoc_req.listen_interval); 1272 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR 1273 " capab_info=0x%02x listen_interval=%d", 1274 MAC2STR(mgmt->sa), capab_info, listen_interval); 1275 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req)); 1276 pos = mgmt->u.assoc_req.variable; 1277 } 1278 1279 sta = ap_get_sta(hapd, mgmt->sa); 1280#ifdef CONFIG_IEEE80211R 1281 if (sta && sta->auth_alg == WLAN_AUTH_FT && 1282 (sta->flags & WLAN_STA_AUTH) == 0) { 1283 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate " 1284 "prior to authentication since it is using " 1285 "over-the-DS FT", MAC2STR(mgmt->sa)); 1286 } else 1287#endif /* CONFIG_IEEE80211R */ 1288 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) { 1289 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1290 HOSTAPD_LEVEL_INFO, "Station tried to " 1291 "associate before authentication " 1292 "(aid=%d flags=0x%x)", 1293 sta ? sta->aid : -1, 1294 sta ? sta->flags : 0); 1295 send_deauth(hapd, mgmt->sa, 1296 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA); 1297 return; 1298 } 1299 1300 if (hapd->tkip_countermeasures) { 1301 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 1302 goto fail; 1303 } 1304 1305 if (listen_interval > hapd->conf->max_listen_interval) { 1306 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1307 HOSTAPD_LEVEL_DEBUG, 1308 "Too large Listen Interval (%d)", 1309 listen_interval); 1310 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE; 1311 goto fail; 1312 } 1313 1314 /* followed by SSID and Supported rates; and HT capabilities if 802.11n 1315 * is used */ 1316 resp = check_assoc_ies(hapd, sta, pos, left, reassoc); 1317 if (resp != WLAN_STATUS_SUCCESS) 1318 goto fail; 1319 1320 if (hostapd_get_aid(hapd, sta) < 0) { 1321 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1322 HOSTAPD_LEVEL_INFO, "No room for more AIDs"); 1323 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 1324 goto fail; 1325 } 1326 1327 sta->capability = capab_info; 1328 sta->listen_interval = listen_interval; 1329 1330 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) 1331 sta->flags |= WLAN_STA_NONERP; 1332 for (i = 0; i < sta->supported_rates_len; i++) { 1333 if ((sta->supported_rates[i] & 0x7f) > 22) { 1334 sta->flags &= ~WLAN_STA_NONERP; 1335 break; 1336 } 1337 } 1338 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) { 1339 sta->nonerp_set = 1; 1340 hapd->iface->num_sta_non_erp++; 1341 if (hapd->iface->num_sta_non_erp == 1) 1342 ieee802_11_set_beacons(hapd->iface); 1343 } 1344 1345 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) && 1346 !sta->no_short_slot_time_set) { 1347 sta->no_short_slot_time_set = 1; 1348 hapd->iface->num_sta_no_short_slot_time++; 1349 if (hapd->iface->current_mode->mode == 1350 HOSTAPD_MODE_IEEE80211G && 1351 hapd->iface->num_sta_no_short_slot_time == 1) 1352 ieee802_11_set_beacons(hapd->iface); 1353 } 1354 1355 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) 1356 sta->flags |= WLAN_STA_SHORT_PREAMBLE; 1357 else 1358 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; 1359 1360 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && 1361 !sta->no_short_preamble_set) { 1362 sta->no_short_preamble_set = 1; 1363 hapd->iface->num_sta_no_short_preamble++; 1364 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G 1365 && hapd->iface->num_sta_no_short_preamble == 1) 1366 ieee802_11_set_beacons(hapd->iface); 1367 } 1368 1369#ifdef CONFIG_IEEE80211N 1370 update_ht_state(hapd, sta); 1371#endif /* CONFIG_IEEE80211N */ 1372 1373 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1374 HOSTAPD_LEVEL_DEBUG, 1375 "association OK (aid %d)", sta->aid); 1376 /* Station will be marked associated, after it acknowledges AssocResp 1377 */ 1378 sta->flags |= WLAN_STA_ASSOC_REQ_OK; 1379 1380#ifdef CONFIG_IEEE80211W 1381 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) { 1382 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out " 1383 "SA Query procedure", reassoc ? "re" : ""); 1384 /* TODO: Send a protected Disassociate frame to the STA using 1385 * the old key and Reason Code "Previous Authentication no 1386 * longer valid". Make sure this is only sent protected since 1387 * unprotected frame would be received by the STA that is now 1388 * trying to associate. 1389 */ 1390 } 1391#endif /* CONFIG_IEEE80211W */ 1392 1393 if (reassoc) { 1394 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap, 1395 ETH_ALEN); 1396 } 1397 1398 if (sta->last_assoc_req) 1399 os_free(sta->last_assoc_req); 1400 sta->last_assoc_req = os_malloc(len); 1401 if (sta->last_assoc_req) 1402 os_memcpy(sta->last_assoc_req, mgmt, len); 1403 1404 /* Make sure that the previously registered inactivity timer will not 1405 * remove the STA immediately. */ 1406 sta->timeout_next = STA_NULLFUNC; 1407 1408 fail: 1409 send_assoc_resp(hapd, sta, resp, reassoc, pos, left); 1410} 1411 1412 1413static void handle_disassoc(struct hostapd_data *hapd, 1414 const struct ieee80211_mgmt *mgmt, size_t len) 1415{ 1416 struct sta_info *sta; 1417 1418 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) { 1419 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)", 1420 (unsigned long) len); 1421 return; 1422 } 1423 1424 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d", 1425 MAC2STR(mgmt->sa), 1426 le_to_host16(mgmt->u.disassoc.reason_code)); 1427 1428 sta = ap_get_sta(hapd, mgmt->sa); 1429 if (sta == NULL) { 1430 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated", 1431 MAC2STR(mgmt->sa)); 1432 return; 1433 } 1434 1435 ap_sta_set_authorized(hapd, sta, 0); 1436 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK); 1437 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC); 1438 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1439 HOSTAPD_LEVEL_INFO, "disassociated"); 1440 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1441 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 1442 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA 1443 * authenticated. */ 1444 accounting_sta_stop(hapd, sta); 1445 ieee802_1x_free_station(sta); 1446 hostapd_drv_sta_remove(hapd, sta->addr); 1447 1448 if (sta->timeout_next == STA_NULLFUNC || 1449 sta->timeout_next == STA_DISASSOC) { 1450 sta->timeout_next = STA_DEAUTH; 1451 eloop_cancel_timeout(ap_handle_timer, hapd, sta); 1452 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer, 1453 hapd, sta); 1454 } 1455 1456 mlme_disassociate_indication( 1457 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code)); 1458} 1459 1460 1461static void handle_deauth(struct hostapd_data *hapd, 1462 const struct ieee80211_mgmt *mgmt, size_t len) 1463{ 1464 struct sta_info *sta; 1465 1466 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) { 1467 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short " 1468 "payload (len=%lu)", (unsigned long) len); 1469 return; 1470 } 1471 1472 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR 1473 " reason_code=%d", 1474 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code)); 1475 1476 sta = ap_get_sta(hapd, mgmt->sa); 1477 if (sta == NULL) { 1478 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying " 1479 "to deauthenticate, but it is not authenticated", 1480 MAC2STR(mgmt->sa)); 1481 return; 1482 } 1483 1484 ap_sta_set_authorized(hapd, sta, 0); 1485 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | 1486 WLAN_STA_ASSOC_REQ_OK); 1487 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH); 1488 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1489 HOSTAPD_LEVEL_DEBUG, "deauthenticated"); 1490 mlme_deauthenticate_indication( 1491 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code)); 1492 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1493 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 1494 ap_free_sta(hapd, sta); 1495} 1496 1497 1498static void handle_beacon(struct hostapd_data *hapd, 1499 const struct ieee80211_mgmt *mgmt, size_t len, 1500 struct hostapd_frame_info *fi) 1501{ 1502 struct ieee802_11_elems elems; 1503 1504 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) { 1505 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)", 1506 (unsigned long) len); 1507 return; 1508 } 1509 1510 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable, 1511 len - (IEEE80211_HDRLEN + 1512 sizeof(mgmt->u.beacon)), &elems, 1513 0); 1514 1515 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi); 1516} 1517 1518 1519#ifdef CONFIG_IEEE80211W 1520 1521static int hostapd_sa_query_action(struct hostapd_data *hapd, 1522 const struct ieee80211_mgmt *mgmt, 1523 size_t len) 1524{ 1525 const u8 *end; 1526 1527 end = mgmt->u.action.u.sa_query_resp.trans_id + 1528 WLAN_SA_QUERY_TR_ID_LEN; 1529 if (((u8 *) mgmt) + len < end) { 1530 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action " 1531 "frame (len=%lu)", (unsigned long) len); 1532 return 0; 1533 } 1534 1535 ieee802_11_sa_query_action(hapd, mgmt->sa, 1536 mgmt->u.action.u.sa_query_resp.action, 1537 mgmt->u.action.u.sa_query_resp.trans_id); 1538 return 1; 1539} 1540 1541 1542static int robust_action_frame(u8 category) 1543{ 1544 return category != WLAN_ACTION_PUBLIC && 1545 category != WLAN_ACTION_HT; 1546} 1547#endif /* CONFIG_IEEE80211W */ 1548 1549 1550static int handle_action(struct hostapd_data *hapd, 1551 const struct ieee80211_mgmt *mgmt, size_t len) 1552{ 1553 struct sta_info *sta; 1554 sta = ap_get_sta(hapd, mgmt->sa); 1555 1556 if (len < IEEE80211_HDRLEN + 1) { 1557 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1558 HOSTAPD_LEVEL_DEBUG, 1559 "handle_action - too short payload (len=%lu)", 1560 (unsigned long) len); 1561 return 0; 1562 } 1563 1564 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC && 1565 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) { 1566 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action " 1567 "frame (category=%u) from unassociated STA " MACSTR, 1568 MAC2STR(mgmt->sa), mgmt->u.action.category); 1569 return 0; 1570 } 1571 1572#ifdef CONFIG_IEEE80211W 1573 if (sta && (sta->flags & WLAN_STA_MFP) && 1574 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) && 1575 robust_action_frame(mgmt->u.action.category)) { 1576 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1577 HOSTAPD_LEVEL_DEBUG, 1578 "Dropped unprotected Robust Action frame from " 1579 "an MFP STA"); 1580 return 0; 1581 } 1582#endif /* CONFIG_IEEE80211W */ 1583 1584 switch (mgmt->u.action.category) { 1585#ifdef CONFIG_IEEE80211R 1586 case WLAN_ACTION_FT: 1587 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action, 1588 len - IEEE80211_HDRLEN)) 1589 break; 1590 return 1; 1591#endif /* CONFIG_IEEE80211R */ 1592 case WLAN_ACTION_WMM: 1593 hostapd_wmm_action(hapd, mgmt, len); 1594 return 1; 1595#ifdef CONFIG_IEEE80211W 1596 case WLAN_ACTION_SA_QUERY: 1597 return hostapd_sa_query_action(hapd, mgmt, len); 1598#endif /* CONFIG_IEEE80211W */ 1599#ifdef CONFIG_WNM 1600 case WLAN_ACTION_WNM: 1601 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len); 1602 return 1; 1603#endif /* CONFIG_WNM */ 1604 case WLAN_ACTION_PUBLIC: 1605 case WLAN_ACTION_PROTECTED_DUAL: 1606 if (hapd->public_action_cb) { 1607 hapd->public_action_cb(hapd->public_action_cb_ctx, 1608 (u8 *) mgmt, len, 1609 hapd->iface->freq); 1610 } 1611 if (hapd->public_action_cb2) { 1612 hapd->public_action_cb2(hapd->public_action_cb2_ctx, 1613 (u8 *) mgmt, len, 1614 hapd->iface->freq); 1615 } 1616 if (hapd->public_action_cb || hapd->public_action_cb2) 1617 return 1; 1618 break; 1619 case WLAN_ACTION_VENDOR_SPECIFIC: 1620 if (hapd->vendor_action_cb) { 1621 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx, 1622 (u8 *) mgmt, len, 1623 hapd->iface->freq) == 0) 1624 return 1; 1625 } 1626 break; 1627 } 1628 1629 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1630 HOSTAPD_LEVEL_DEBUG, 1631 "handle_action - unknown action category %d or invalid " 1632 "frame", 1633 mgmt->u.action.category); 1634 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) && 1635 !(mgmt->sa[0] & 0x01)) { 1636 struct ieee80211_mgmt *resp; 1637 1638 /* 1639 * IEEE 802.11-REVma/D9.0 - 7.3.1.11 1640 * Return the Action frame to the source without change 1641 * except that MSB of the Category set to 1. 1642 */ 1643 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action " 1644 "frame back to sender"); 1645 resp = os_malloc(len); 1646 if (resp == NULL) 1647 return 0; 1648 os_memcpy(resp, mgmt, len); 1649 os_memcpy(resp->da, resp->sa, ETH_ALEN); 1650 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); 1651 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); 1652 resp->u.action.category |= 0x80; 1653 1654 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) { 1655 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send " 1656 "Action frame"); 1657 } 1658 os_free(resp); 1659 } 1660 1661 return 1; 1662} 1663 1664 1665/** 1666 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames 1667 * @hapd: hostapd BSS data structure (the BSS to which the management frame was 1668 * sent to) 1669 * @buf: management frame data (starting from IEEE 802.11 header) 1670 * @len: length of frame data in octets 1671 * @fi: meta data about received frame (signal level, etc.) 1672 * 1673 * Process all incoming IEEE 802.11 management frames. This will be called for 1674 * each frame received from the kernel driver through wlan#ap interface. In 1675 * addition, it can be called to re-inserted pending frames (e.g., when using 1676 * external RADIUS server as an MAC ACL). 1677 */ 1678int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len, 1679 struct hostapd_frame_info *fi) 1680{ 1681 struct ieee80211_mgmt *mgmt; 1682 int broadcast; 1683 u16 fc, stype; 1684 int ret = 0; 1685 1686#ifdef CONFIG_TESTING_OPTIONS 1687 if (hapd->ext_mgmt_frame_handling) { 1688 size_t hex_len = 2 * len + 1; 1689 char *hex = os_malloc(hex_len); 1690 if (hex) { 1691 wpa_snprintf_hex(hex, hex_len, buf, len); 1692 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-RX %s", hex); 1693 os_free(hex); 1694 } 1695 return 1; 1696 } 1697#endif /* CONFIG_TESTING_OPTIONS */ 1698 1699 if (len < 24) 1700 return 0; 1701 1702 mgmt = (struct ieee80211_mgmt *) buf; 1703 fc = le_to_host16(mgmt->frame_control); 1704 stype = WLAN_FC_GET_STYPE(fc); 1705 1706 if (stype == WLAN_FC_STYPE_BEACON) { 1707 handle_beacon(hapd, mgmt, len, fi); 1708 return 1; 1709 } 1710 1711 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff && 1712 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff && 1713 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff; 1714 1715 if (!broadcast && 1716#ifdef CONFIG_P2P 1717 /* Invitation responses can be sent with the peer MAC as BSSID */ 1718 !((hapd->conf->p2p & P2P_GROUP_OWNER) && 1719 stype == WLAN_FC_STYPE_ACTION) && 1720#endif /* CONFIG_P2P */ 1721 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) { 1722 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address", 1723 MAC2STR(mgmt->bssid)); 1724 return 0; 1725 } 1726 1727 1728 if (stype == WLAN_FC_STYPE_PROBE_REQ) { 1729 handle_probe_req(hapd, mgmt, len, fi->ssi_signal); 1730 return 1; 1731 } 1732 1733 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) { 1734 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1735 HOSTAPD_LEVEL_DEBUG, 1736 "MGMT: DA=" MACSTR " not our address", 1737 MAC2STR(mgmt->da)); 1738 return 0; 1739 } 1740 1741 switch (stype) { 1742 case WLAN_FC_STYPE_AUTH: 1743 wpa_printf(MSG_DEBUG, "mgmt::auth"); 1744 handle_auth(hapd, mgmt, len); 1745 ret = 1; 1746 break; 1747 case WLAN_FC_STYPE_ASSOC_REQ: 1748 wpa_printf(MSG_DEBUG, "mgmt::assoc_req"); 1749 handle_assoc(hapd, mgmt, len, 0); 1750 ret = 1; 1751 break; 1752 case WLAN_FC_STYPE_REASSOC_REQ: 1753 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req"); 1754 handle_assoc(hapd, mgmt, len, 1); 1755 ret = 1; 1756 break; 1757 case WLAN_FC_STYPE_DISASSOC: 1758 wpa_printf(MSG_DEBUG, "mgmt::disassoc"); 1759 handle_disassoc(hapd, mgmt, len); 1760 ret = 1; 1761 break; 1762 case WLAN_FC_STYPE_DEAUTH: 1763 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth"); 1764 handle_deauth(hapd, mgmt, len); 1765 ret = 1; 1766 break; 1767 case WLAN_FC_STYPE_ACTION: 1768 wpa_printf(MSG_DEBUG, "mgmt::action"); 1769 ret = handle_action(hapd, mgmt, len); 1770 break; 1771 default: 1772 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1773 HOSTAPD_LEVEL_DEBUG, 1774 "unknown mgmt frame subtype %d", stype); 1775 break; 1776 } 1777 1778 return ret; 1779} 1780 1781 1782static void handle_auth_cb(struct hostapd_data *hapd, 1783 const struct ieee80211_mgmt *mgmt, 1784 size_t len, int ok) 1785{ 1786 u16 auth_alg, auth_transaction, status_code; 1787 struct sta_info *sta; 1788 1789 if (!ok) { 1790 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1791 HOSTAPD_LEVEL_NOTICE, 1792 "did not acknowledge authentication response"); 1793 return; 1794 } 1795 1796 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 1797 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)", 1798 (unsigned long) len); 1799 return; 1800 } 1801 1802 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 1803 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 1804 status_code = le_to_host16(mgmt->u.auth.status_code); 1805 1806 sta = ap_get_sta(hapd, mgmt->da); 1807 if (!sta) { 1808 wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found", 1809 MAC2STR(mgmt->da)); 1810 return; 1811 } 1812 1813 if (status_code == WLAN_STATUS_SUCCESS && 1814 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || 1815 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { 1816 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1817 HOSTAPD_LEVEL_INFO, "authenticated"); 1818 sta->flags |= WLAN_STA_AUTH; 1819 } 1820} 1821 1822 1823static void hostapd_set_wds_encryption(struct hostapd_data *hapd, 1824 struct sta_info *sta, 1825 char *ifname_wds) 1826{ 1827 int i; 1828 struct hostapd_ssid *ssid = sta->ssid; 1829 1830 if (hapd->conf->ieee802_1x || hapd->conf->wpa) 1831 return; 1832 1833 for (i = 0; i < 4; i++) { 1834 if (ssid->wep.key[i] && 1835 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i, 1836 i == ssid->wep.idx, NULL, 0, 1837 ssid->wep.key[i], ssid->wep.len[i])) { 1838 wpa_printf(MSG_WARNING, 1839 "Could not set WEP keys for WDS interface; %s", 1840 ifname_wds); 1841 break; 1842 } 1843 } 1844} 1845 1846 1847static void handle_assoc_cb(struct hostapd_data *hapd, 1848 const struct ieee80211_mgmt *mgmt, 1849 size_t len, int reassoc, int ok) 1850{ 1851 u16 status; 1852 struct sta_info *sta; 1853 int new_assoc = 1; 1854 struct ieee80211_ht_capabilities ht_cap; 1855 struct ieee80211_vht_capabilities vht_cap; 1856 1857 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) : 1858 sizeof(mgmt->u.assoc_resp))) { 1859 wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)", 1860 reassoc, (unsigned long) len); 1861 return; 1862 } 1863 1864 sta = ap_get_sta(hapd, mgmt->da); 1865 if (!sta) { 1866 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found", 1867 MAC2STR(mgmt->da)); 1868 return; 1869 } 1870 1871 if (!ok) { 1872 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1873 HOSTAPD_LEVEL_DEBUG, 1874 "did not acknowledge association response"); 1875 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK; 1876 return; 1877 } 1878 1879 if (reassoc) 1880 status = le_to_host16(mgmt->u.reassoc_resp.status_code); 1881 else 1882 status = le_to_host16(mgmt->u.assoc_resp.status_code); 1883 1884 if (status != WLAN_STATUS_SUCCESS) 1885 goto fail; 1886 1887 /* Stop previous accounting session, if one is started, and allocate 1888 * new session id for the new session. */ 1889 accounting_sta_stop(hapd, sta); 1890 1891 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1892 HOSTAPD_LEVEL_INFO, 1893 "associated (aid %d)", 1894 sta->aid); 1895 1896 if (sta->flags & WLAN_STA_ASSOC) 1897 new_assoc = 0; 1898 sta->flags |= WLAN_STA_ASSOC; 1899 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE; 1900 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) || 1901 sta->auth_alg == WLAN_AUTH_FT) { 1902 /* 1903 * Open, static WEP, or FT protocol; no separate authorization 1904 * step. 1905 */ 1906 ap_sta_set_authorized(hapd, sta, 1); 1907 } 1908 1909 if (reassoc) 1910 mlme_reassociate_indication(hapd, sta); 1911 else 1912 mlme_associate_indication(hapd, sta); 1913 1914#ifdef CONFIG_IEEE80211W 1915 sta->sa_query_timed_out = 0; 1916#endif /* CONFIG_IEEE80211W */ 1917 1918 /* 1919 * Remove the STA entry in order to make sure the STA PS state gets 1920 * cleared and configuration gets updated in case of reassociation back 1921 * to the same AP. 1922 */ 1923 hostapd_drv_sta_remove(hapd, sta->addr); 1924 1925#ifdef CONFIG_IEEE80211N 1926 if (sta->flags & WLAN_STA_HT) 1927 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap); 1928#endif /* CONFIG_IEEE80211N */ 1929#ifdef CONFIG_IEEE80211AC 1930 if (sta->flags & WLAN_STA_VHT) 1931 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap); 1932#endif /* CONFIG_IEEE80211AC */ 1933 1934 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability, 1935 sta->supported_rates, sta->supported_rates_len, 1936 sta->listen_interval, 1937 sta->flags & WLAN_STA_HT ? &ht_cap : NULL, 1938 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL, 1939 sta->flags, sta->qosinfo)) { 1940 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1941 HOSTAPD_LEVEL_NOTICE, 1942 "Could not add STA to kernel driver"); 1943 1944 ap_sta_disconnect(hapd, sta, sta->addr, 1945 WLAN_REASON_DISASSOC_AP_BUSY); 1946 1947 goto fail; 1948 } 1949 1950 if (sta->flags & WLAN_STA_WDS) { 1951 int ret; 1952 char ifname_wds[IFNAMSIZ + 1]; 1953 1954 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr, 1955 sta->aid, 1); 1956 if (!ret) 1957 hostapd_set_wds_encryption(hapd, sta, ifname_wds); 1958 } 1959 1960 if (sta->eapol_sm == NULL) { 1961 /* 1962 * This STA does not use RADIUS server for EAP authentication, 1963 * so bind it to the selected VLAN interface now, since the 1964 * interface selection is not going to change anymore. 1965 */ 1966 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1967 goto fail; 1968 } else if (sta->vlan_id) { 1969 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */ 1970 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1971 goto fail; 1972 } 1973 1974 hostapd_set_sta_flags(hapd, sta); 1975 1976 if (sta->auth_alg == WLAN_AUTH_FT) 1977 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); 1978 else 1979 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); 1980 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc); 1981 1982 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); 1983 1984 fail: 1985 /* Copy of the association request is not needed anymore */ 1986 if (sta->last_assoc_req) { 1987 os_free(sta->last_assoc_req); 1988 sta->last_assoc_req = NULL; 1989 } 1990} 1991 1992 1993static void handle_deauth_cb(struct hostapd_data *hapd, 1994 const struct ieee80211_mgmt *mgmt, 1995 size_t len, int ok) 1996{ 1997 struct sta_info *sta; 1998 if (mgmt->da[0] & 0x01) 1999 return; 2000 sta = ap_get_sta(hapd, mgmt->da); 2001 if (!sta) { 2002 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR 2003 " not found", MAC2STR(mgmt->da)); 2004 return; 2005 } 2006 if (ok) 2007 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth", 2008 MAC2STR(sta->addr)); 2009 else 2010 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2011 "deauth", MAC2STR(sta->addr)); 2012 2013 ap_sta_deauth_cb(hapd, sta); 2014} 2015 2016 2017static void handle_disassoc_cb(struct hostapd_data *hapd, 2018 const struct ieee80211_mgmt *mgmt, 2019 size_t len, int ok) 2020{ 2021 struct sta_info *sta; 2022 if (mgmt->da[0] & 0x01) 2023 return; 2024 sta = ap_get_sta(hapd, mgmt->da); 2025 if (!sta) { 2026 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR 2027 " not found", MAC2STR(mgmt->da)); 2028 return; 2029 } 2030 if (ok) 2031 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc", 2032 MAC2STR(sta->addr)); 2033 else 2034 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2035 "disassoc", MAC2STR(sta->addr)); 2036 2037 ap_sta_disassoc_cb(hapd, sta); 2038} 2039 2040 2041/** 2042 * ieee802_11_mgmt_cb - Process management frame TX status callback 2043 * @hapd: hostapd BSS data structure (the BSS from which the management frame 2044 * was sent from) 2045 * @buf: management frame data (starting from IEEE 802.11 header) 2046 * @len: length of frame data in octets 2047 * @stype: management frame subtype from frame control field 2048 * @ok: Whether the frame was ACK'ed 2049 */ 2050void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len, 2051 u16 stype, int ok) 2052{ 2053 const struct ieee80211_mgmt *mgmt; 2054 mgmt = (const struct ieee80211_mgmt *) buf; 2055 2056#ifdef CONFIG_TESTING_OPTIONS 2057 if (hapd->ext_mgmt_frame_handling) { 2058 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d", 2059 stype, ok); 2060 return; 2061 } 2062#endif /* CONFIG_TESTING_OPTIONS */ 2063 2064 switch (stype) { 2065 case WLAN_FC_STYPE_AUTH: 2066 wpa_printf(MSG_DEBUG, "mgmt::auth cb"); 2067 handle_auth_cb(hapd, mgmt, len, ok); 2068 break; 2069 case WLAN_FC_STYPE_ASSOC_RESP: 2070 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb"); 2071 handle_assoc_cb(hapd, mgmt, len, 0, ok); 2072 break; 2073 case WLAN_FC_STYPE_REASSOC_RESP: 2074 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb"); 2075 handle_assoc_cb(hapd, mgmt, len, 1, ok); 2076 break; 2077 case WLAN_FC_STYPE_PROBE_RESP: 2078 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb"); 2079 break; 2080 case WLAN_FC_STYPE_DEAUTH: 2081 wpa_printf(MSG_DEBUG, "mgmt::deauth cb"); 2082 handle_deauth_cb(hapd, mgmt, len, ok); 2083 break; 2084 case WLAN_FC_STYPE_DISASSOC: 2085 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb"); 2086 handle_disassoc_cb(hapd, mgmt, len, ok); 2087 break; 2088 case WLAN_FC_STYPE_ACTION: 2089 wpa_printf(MSG_DEBUG, "mgmt::action cb"); 2090 break; 2091 default: 2092 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype); 2093 break; 2094 } 2095} 2096 2097 2098int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 2099{ 2100 /* TODO */ 2101 return 0; 2102} 2103 2104 2105int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 2106 char *buf, size_t buflen) 2107{ 2108 /* TODO */ 2109 return 0; 2110} 2111 2112 2113void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr, 2114 const u8 *buf, size_t len, int ack) 2115{ 2116 struct sta_info *sta; 2117 struct hostapd_iface *iface = hapd->iface; 2118 2119 sta = ap_get_sta(hapd, addr); 2120 if (sta == NULL && iface->num_bss > 1) { 2121 size_t j; 2122 for (j = 0; j < iface->num_bss; j++) { 2123 hapd = iface->bss[j]; 2124 sta = ap_get_sta(hapd, addr); 2125 if (sta) 2126 break; 2127 } 2128 } 2129 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) 2130 return; 2131 if (sta->flags & WLAN_STA_PENDING_POLL) { 2132 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending " 2133 "activity poll", MAC2STR(sta->addr), 2134 ack ? "ACKed" : "did not ACK"); 2135 if (ack) 2136 sta->flags &= ~WLAN_STA_PENDING_POLL; 2137 } 2138 2139 ieee802_1x_tx_status(hapd, sta, buf, len, ack); 2140} 2141 2142 2143void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst, 2144 const u8 *data, size_t len, int ack) 2145{ 2146 struct sta_info *sta; 2147 struct hostapd_iface *iface = hapd->iface; 2148 2149 sta = ap_get_sta(hapd, dst); 2150 if (sta == NULL && iface->num_bss > 1) { 2151 size_t j; 2152 for (j = 0; j < iface->num_bss; j++) { 2153 hapd = iface->bss[j]; 2154 sta = ap_get_sta(hapd, dst); 2155 if (sta) 2156 break; 2157 } 2158 } 2159 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 2160 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA " 2161 MACSTR " that is not currently associated", 2162 MAC2STR(dst)); 2163 return; 2164 } 2165 2166 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack); 2167} 2168 2169 2170void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr) 2171{ 2172 struct sta_info *sta; 2173 struct hostapd_iface *iface = hapd->iface; 2174 2175 sta = ap_get_sta(hapd, addr); 2176 if (sta == NULL && iface->num_bss > 1) { 2177 size_t j; 2178 for (j = 0; j < iface->num_bss; j++) { 2179 hapd = iface->bss[j]; 2180 sta = ap_get_sta(hapd, addr); 2181 if (sta) 2182 break; 2183 } 2184 } 2185 if (sta == NULL) 2186 return; 2187 if (!(sta->flags & WLAN_STA_PENDING_POLL)) 2188 return; 2189 2190 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending " 2191 "activity poll", MAC2STR(sta->addr)); 2192 sta->flags &= ~WLAN_STA_PENDING_POLL; 2193} 2194 2195 2196void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src, 2197 int wds) 2198{ 2199 struct sta_info *sta; 2200 2201 sta = ap_get_sta(hapd, src); 2202 if (sta && (sta->flags & WLAN_STA_ASSOC)) { 2203 if (!hapd->conf->wds_sta) 2204 return; 2205 2206 if (wds && !(sta->flags & WLAN_STA_WDS)) { 2207 int ret; 2208 char ifname_wds[IFNAMSIZ + 1]; 2209 2210 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for " 2211 "STA " MACSTR " (aid %u)", 2212 MAC2STR(sta->addr), sta->aid); 2213 sta->flags |= WLAN_STA_WDS; 2214 ret = hostapd_set_wds_sta(hapd, ifname_wds, 2215 sta->addr, sta->aid, 1); 2216 if (!ret) 2217 hostapd_set_wds_encryption(hapd, sta, 2218 ifname_wds); 2219 } 2220 return; 2221 } 2222 2223 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA " 2224 MACSTR, MAC2STR(src)); 2225 if (src[0] & 0x01) { 2226 /* Broadcast bit set in SA?! Ignore the frame silently. */ 2227 return; 2228 } 2229 2230 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) { 2231 wpa_printf(MSG_DEBUG, "Association Response to the STA has " 2232 "already been sent, but no TX status yet known - " 2233 "ignore Class 3 frame issue with " MACSTR, 2234 MAC2STR(src)); 2235 return; 2236 } 2237 2238 if (sta && (sta->flags & WLAN_STA_AUTH)) 2239 hostapd_drv_sta_disassoc( 2240 hapd, src, 2241 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2242 else 2243 hostapd_drv_sta_deauth( 2244 hapd, src, 2245 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2246} 2247 2248 2249#endif /* CONFIG_NATIVE_WINDOWS */ 2250