ieee802_11.c revision bd14a57187b024f49f5b9ace55ef457d8d04650a
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 goto failed; 475 } 476 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 477 HOSTAPD_LEVEL_DEBUG, 478 "SAE authentication (RX confirm)"); 479 if (sae_check_confirm(sta->sae, mgmt->u.auth.variable, 480 ((u8 *) mgmt) + len - 481 mgmt->u.auth.variable) < 0) { 482 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 483 } else { 484 resp = WLAN_STATUS_SUCCESS; 485 sta->flags |= WLAN_STA_AUTH; 486 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 487 sta->auth_alg = WLAN_AUTH_SAE; 488 mlme_authenticate_indication(hapd, sta); 489 490 data = auth_build_sae_confirm(hapd, sta); 491 if (data == NULL) 492 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 493 else { 494 sta->sae->state = SAE_ACCEPTED; 495 sae_clear_temp_data(sta->sae); 496 } 497 } 498 } else { 499 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 500 HOSTAPD_LEVEL_DEBUG, 501 "unexpected SAE authentication transaction %u", 502 auth_transaction); 503 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 504 } 505 506failed: 507 sta->auth_alg = WLAN_AUTH_SAE; 508 509 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE, 510 auth_transaction, resp, 511 data ? wpabuf_head(data) : (u8 *) "", 512 data ? wpabuf_len(data) : 0); 513 wpabuf_free(data); 514} 515#endif /* CONFIG_SAE */ 516 517 518static void handle_auth(struct hostapd_data *hapd, 519 const struct ieee80211_mgmt *mgmt, size_t len) 520{ 521 u16 auth_alg, auth_transaction, status_code; 522 u16 resp = WLAN_STATUS_SUCCESS; 523 struct sta_info *sta = NULL; 524 int res; 525 u16 fc; 526 const u8 *challenge = NULL; 527 u32 session_timeout, acct_interim_interval; 528 int vlan_id = 0; 529 struct hostapd_sta_wpa_psk_short *psk = NULL; 530 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; 531 size_t resp_ies_len = 0; 532 char *identity = NULL; 533 char *radius_cui = NULL; 534 535 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 536 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)", 537 (unsigned long) len); 538 return; 539 } 540 541#ifdef CONFIG_TESTING_OPTIONS 542 if (hapd->iconf->ignore_auth_probability > 0.0d && 543 drand48() < hapd->iconf->ignore_auth_probability) { 544 wpa_printf(MSG_INFO, 545 "TESTING: ignoring auth frame from " MACSTR, 546 MAC2STR(mgmt->sa)); 547 return; 548 } 549#endif /* CONFIG_TESTING_OPTIONS */ 550 551 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 552 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 553 status_code = le_to_host16(mgmt->u.auth.status_code); 554 fc = le_to_host16(mgmt->frame_control); 555 556 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 557 2 + WLAN_AUTH_CHALLENGE_LEN && 558 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE && 559 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN) 560 challenge = &mgmt->u.auth.variable[2]; 561 562 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d " 563 "auth_transaction=%d status_code=%d wep=%d%s", 564 MAC2STR(mgmt->sa), auth_alg, auth_transaction, 565 status_code, !!(fc & WLAN_FC_ISWEP), 566 challenge ? " challenge" : ""); 567 568 if (hapd->tkip_countermeasures) { 569 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 570 goto fail; 571 } 572 573 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) && 574 auth_alg == WLAN_AUTH_OPEN) || 575#ifdef CONFIG_IEEE80211R 576 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && 577 auth_alg == WLAN_AUTH_FT) || 578#endif /* CONFIG_IEEE80211R */ 579#ifdef CONFIG_SAE 580 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) && 581 auth_alg == WLAN_AUTH_SAE) || 582#endif /* CONFIG_SAE */ 583 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) && 584 auth_alg == WLAN_AUTH_SHARED_KEY))) { 585 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)", 586 auth_alg); 587 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 588 goto fail; 589 } 590 591 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE || 592 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) { 593 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)", 594 auth_transaction); 595 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 596 goto fail; 597 } 598 599 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { 600 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", 601 MAC2STR(mgmt->sa)); 602 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 603 goto fail; 604 } 605 606 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len, 607 &session_timeout, 608 &acct_interim_interval, &vlan_id, 609 &psk, &identity, &radius_cui); 610 611 if (res == HOSTAPD_ACL_REJECT) { 612 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", 613 MAC2STR(mgmt->sa)); 614 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 615 goto fail; 616 } 617 if (res == HOSTAPD_ACL_PENDING) { 618 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR 619 " waiting for an external authentication", 620 MAC2STR(mgmt->sa)); 621 /* Authentication code will re-send the authentication frame 622 * after it has received (and cached) information from the 623 * external source. */ 624 return; 625 } 626 627 sta = ap_sta_add(hapd, mgmt->sa); 628 if (!sta) { 629 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 630 goto fail; 631 } 632 633 if (vlan_id > 0) { 634 if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) { 635 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 636 HOSTAPD_LEVEL_INFO, "Invalid VLAN ID " 637 "%d received from RADIUS server", 638 vlan_id); 639 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 640 goto fail; 641 } 642 sta->vlan_id = vlan_id; 643 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 644 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); 645 } 646 647 hostapd_free_psk_list(sta->psk); 648 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) { 649 sta->psk = psk; 650 psk = NULL; 651 } else { 652 sta->psk = NULL; 653 } 654 655 sta->identity = identity; 656 identity = NULL; 657 sta->radius_cui = radius_cui; 658 radius_cui = NULL; 659 660 sta->flags &= ~WLAN_STA_PREAUTH; 661 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); 662 663 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval) 664 sta->acct_interim_interval = acct_interim_interval; 665 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) 666 ap_sta_session_timeout(hapd, sta, session_timeout); 667 else 668 ap_sta_no_session_timeout(hapd, sta); 669 670 switch (auth_alg) { 671 case WLAN_AUTH_OPEN: 672 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 673 HOSTAPD_LEVEL_DEBUG, 674 "authentication OK (open system)"); 675 sta->flags |= WLAN_STA_AUTH; 676 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 677 sta->auth_alg = WLAN_AUTH_OPEN; 678 mlme_authenticate_indication(hapd, sta); 679 break; 680 case WLAN_AUTH_SHARED_KEY: 681 resp = auth_shared_key(hapd, sta, auth_transaction, challenge, 682 fc & WLAN_FC_ISWEP); 683 sta->auth_alg = WLAN_AUTH_SHARED_KEY; 684 mlme_authenticate_indication(hapd, sta); 685 if (sta->challenge && auth_transaction == 1) { 686 resp_ies[0] = WLAN_EID_CHALLENGE; 687 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN; 688 os_memcpy(resp_ies + 2, sta->challenge, 689 WLAN_AUTH_CHALLENGE_LEN); 690 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN; 691 } 692 break; 693#ifdef CONFIG_IEEE80211R 694 case WLAN_AUTH_FT: 695 sta->auth_alg = WLAN_AUTH_FT; 696 if (sta->wpa_sm == NULL) 697 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 698 sta->addr, NULL); 699 if (sta->wpa_sm == NULL) { 700 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " 701 "state machine"); 702 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 703 goto fail; 704 } 705 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid, 706 auth_transaction, mgmt->u.auth.variable, 707 len - IEEE80211_HDRLEN - 708 sizeof(mgmt->u.auth), 709 handle_auth_ft_finish, hapd); 710 /* handle_auth_ft_finish() callback will complete auth. */ 711 return; 712#endif /* CONFIG_IEEE80211R */ 713#ifdef CONFIG_SAE 714 case WLAN_AUTH_SAE: 715 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction); 716 return; 717#endif /* CONFIG_SAE */ 718 } 719 720 fail: 721 os_free(identity); 722 os_free(radius_cui); 723 hostapd_free_psk_list(psk); 724 725 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg, 726 auth_transaction + 1, resp, resp_ies, resp_ies_len); 727} 728 729 730static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta) 731{ 732 int i, j = 32, aid; 733 734 /* get a unique AID */ 735 if (sta->aid > 0) { 736 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid); 737 return 0; 738 } 739 740 for (i = 0; i < AID_WORDS; i++) { 741 if (hapd->sta_aid[i] == (u32) -1) 742 continue; 743 for (j = 0; j < 32; j++) { 744 if (!(hapd->sta_aid[i] & BIT(j))) 745 break; 746 } 747 if (j < 32) 748 break; 749 } 750 if (j == 32) 751 return -1; 752 aid = i * 32 + j + 1; 753 if (aid > 2007) 754 return -1; 755 756 sta->aid = aid; 757 hapd->sta_aid[i] |= BIT(j); 758 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid); 759 return 0; 760} 761 762 763static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta, 764 const u8 *ssid_ie, size_t ssid_ie_len) 765{ 766 if (ssid_ie == NULL) 767 return WLAN_STATUS_UNSPECIFIED_FAILURE; 768 769 if (ssid_ie_len != hapd->conf->ssid.ssid_len || 770 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) { 771 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 772 HOSTAPD_LEVEL_INFO, 773 "Station tried to associate with unknown SSID " 774 "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len)); 775 return WLAN_STATUS_UNSPECIFIED_FAILURE; 776 } 777 778 return WLAN_STATUS_SUCCESS; 779} 780 781 782static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta, 783 const u8 *wmm_ie, size_t wmm_ie_len) 784{ 785 sta->flags &= ~WLAN_STA_WMM; 786 sta->qosinfo = 0; 787 if (wmm_ie && hapd->conf->wmm_enabled) { 788 struct wmm_information_element *wmm; 789 790 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) { 791 hostapd_logger(hapd, sta->addr, 792 HOSTAPD_MODULE_WPA, 793 HOSTAPD_LEVEL_DEBUG, 794 "invalid WMM element in association " 795 "request"); 796 return WLAN_STATUS_UNSPECIFIED_FAILURE; 797 } 798 799 sta->flags |= WLAN_STA_WMM; 800 wmm = (struct wmm_information_element *) wmm_ie; 801 sta->qosinfo = wmm->qos_info; 802 } 803 return WLAN_STATUS_SUCCESS; 804} 805 806 807static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta, 808 struct ieee802_11_elems *elems) 809{ 810 if (!elems->supp_rates) { 811 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 812 HOSTAPD_LEVEL_DEBUG, 813 "No supported rates element in AssocReq"); 814 return WLAN_STATUS_UNSPECIFIED_FAILURE; 815 } 816 817 if (elems->supp_rates_len + elems->ext_supp_rates_len > 818 sizeof(sta->supported_rates)) { 819 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 820 HOSTAPD_LEVEL_DEBUG, 821 "Invalid supported rates element length %d+%d", 822 elems->supp_rates_len, 823 elems->ext_supp_rates_len); 824 return WLAN_STATUS_UNSPECIFIED_FAILURE; 825 } 826 827 sta->supported_rates_len = merge_byte_arrays( 828 sta->supported_rates, sizeof(sta->supported_rates), 829 elems->supp_rates, elems->supp_rates_len, 830 elems->ext_supp_rates, elems->ext_supp_rates_len); 831 832 return WLAN_STATUS_SUCCESS; 833} 834 835 836static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta, 837 const u8 *ext_capab_ie, size_t ext_capab_ie_len) 838{ 839#ifdef CONFIG_INTERWORKING 840 /* check for QoS Map support */ 841 if (ext_capab_ie_len >= 5) { 842 if (ext_capab_ie[4] & 0x01) 843 sta->qos_map_enabled = 1; 844 } 845#endif /* CONFIG_INTERWORKING */ 846 847 return WLAN_STATUS_SUCCESS; 848} 849 850 851static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, 852 const u8 *ies, size_t ies_len, int reassoc) 853{ 854 struct ieee802_11_elems elems; 855 u16 resp; 856 const u8 *wpa_ie; 857 size_t wpa_ie_len; 858 const u8 *p2p_dev_addr = NULL; 859 860 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { 861 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 862 HOSTAPD_LEVEL_INFO, "Station sent an invalid " 863 "association request"); 864 return WLAN_STATUS_UNSPECIFIED_FAILURE; 865 } 866 867 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len); 868 if (resp != WLAN_STATUS_SUCCESS) 869 return resp; 870 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len); 871 if (resp != WLAN_STATUS_SUCCESS) 872 return resp; 873 resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len); 874 if (resp != WLAN_STATUS_SUCCESS) 875 return resp; 876 resp = copy_supp_rates(hapd, sta, &elems); 877 if (resp != WLAN_STATUS_SUCCESS) 878 return resp; 879#ifdef CONFIG_IEEE80211N 880 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities, 881 elems.ht_capabilities_len); 882 if (resp != WLAN_STATUS_SUCCESS) 883 return resp; 884 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && 885 !(sta->flags & WLAN_STA_HT)) { 886 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 887 HOSTAPD_LEVEL_INFO, "Station does not support " 888 "mandatory HT PHY - reject association"); 889 return WLAN_STATUS_ASSOC_DENIED_NO_HT; 890 } 891#endif /* CONFIG_IEEE80211N */ 892 893#ifdef CONFIG_IEEE80211AC 894 resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities, 895 elems.vht_capabilities_len); 896 if (resp != WLAN_STATUS_SUCCESS) 897 return resp; 898 899 resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif); 900 if (resp != WLAN_STATUS_SUCCESS) 901 return resp; 902 903 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && 904 !(sta->flags & WLAN_STA_VHT)) { 905 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 906 HOSTAPD_LEVEL_INFO, "Station does not support " 907 "mandatory VHT PHY - reject association"); 908 return WLAN_STATUS_ASSOC_DENIED_NO_VHT; 909 } 910#endif /* CONFIG_IEEE80211AC */ 911 912#ifdef CONFIG_P2P 913 if (elems.p2p) { 914 wpabuf_free(sta->p2p_ie); 915 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 916 P2P_IE_VENDOR_TYPE); 917 if (sta->p2p_ie) 918 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie); 919 } else { 920 wpabuf_free(sta->p2p_ie); 921 sta->p2p_ie = NULL; 922 } 923#endif /* CONFIG_P2P */ 924 925 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { 926 wpa_ie = elems.rsn_ie; 927 wpa_ie_len = elems.rsn_ie_len; 928 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) && 929 elems.wpa_ie) { 930 wpa_ie = elems.wpa_ie; 931 wpa_ie_len = elems.wpa_ie_len; 932 } else { 933 wpa_ie = NULL; 934 wpa_ie_len = 0; 935 } 936 937#ifdef CONFIG_WPS 938 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2); 939 if (hapd->conf->wps_state && elems.wps_ie) { 940 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association " 941 "Request - assume WPS is used"); 942 sta->flags |= WLAN_STA_WPS; 943 wpabuf_free(sta->wps_ie); 944 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 945 WPS_IE_VENDOR_TYPE); 946 if (sta->wps_ie && wps_is_20(sta->wps_ie)) { 947 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0"); 948 sta->flags |= WLAN_STA_WPS2; 949 } 950 wpa_ie = NULL; 951 wpa_ie_len = 0; 952 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) { 953 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in " 954 "(Re)Association Request - reject"); 955 return WLAN_STATUS_INVALID_IE; 956 } 957 } else if (hapd->conf->wps_state && wpa_ie == NULL) { 958 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in " 959 "(Re)Association Request - possible WPS use"); 960 sta->flags |= WLAN_STA_MAYBE_WPS; 961 } else 962#endif /* CONFIG_WPS */ 963 if (hapd->conf->wpa && wpa_ie == NULL) { 964 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 965 HOSTAPD_LEVEL_INFO, 966 "No WPA/RSN IE in association request"); 967 return WLAN_STATUS_INVALID_IE; 968 } 969 970 if (hapd->conf->wpa && wpa_ie) { 971 int res; 972 wpa_ie -= 2; 973 wpa_ie_len += 2; 974 if (sta->wpa_sm == NULL) 975 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 976 sta->addr, 977 p2p_dev_addr); 978 if (sta->wpa_sm == NULL) { 979 wpa_printf(MSG_WARNING, "Failed to initialize WPA " 980 "state machine"); 981 return WLAN_STATUS_UNSPECIFIED_FAILURE; 982 } 983 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, 984 wpa_ie, wpa_ie_len, 985 elems.mdie, elems.mdie_len); 986 if (res == WPA_INVALID_GROUP) 987 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; 988 else if (res == WPA_INVALID_PAIRWISE) 989 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; 990 else if (res == WPA_INVALID_AKMP) 991 resp = WLAN_STATUS_AKMP_NOT_VALID; 992 else if (res == WPA_ALLOC_FAIL) 993 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 994#ifdef CONFIG_IEEE80211W 995 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) 996 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 997 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) 998 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 999#endif /* CONFIG_IEEE80211W */ 1000 else if (res == WPA_INVALID_MDIE) 1001 resp = WLAN_STATUS_INVALID_MDIE; 1002 else if (res != WPA_IE_OK) 1003 resp = WLAN_STATUS_INVALID_IE; 1004 if (resp != WLAN_STATUS_SUCCESS) 1005 return resp; 1006#ifdef CONFIG_IEEE80211W 1007 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1008 sta->sa_query_count > 0) 1009 ap_check_sa_query_timeout(hapd, sta); 1010 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1011 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) { 1012 /* 1013 * STA has already been associated with MFP and SA 1014 * Query timeout has not been reached. Reject the 1015 * association attempt temporarily and start SA Query, 1016 * if one is not pending. 1017 */ 1018 1019 if (sta->sa_query_count == 0) 1020 ap_sta_start_sa_query(hapd, sta); 1021 1022 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; 1023 } 1024 1025 if (wpa_auth_uses_mfp(sta->wpa_sm)) 1026 sta->flags |= WLAN_STA_MFP; 1027 else 1028 sta->flags &= ~WLAN_STA_MFP; 1029#endif /* CONFIG_IEEE80211W */ 1030 1031#ifdef CONFIG_IEEE80211R 1032 if (sta->auth_alg == WLAN_AUTH_FT) { 1033 if (!reassoc) { 1034 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried " 1035 "to use association (not " 1036 "re-association) with FT auth_alg", 1037 MAC2STR(sta->addr)); 1038 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1039 } 1040 1041 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies, 1042 ies_len); 1043 if (resp != WLAN_STATUS_SUCCESS) 1044 return resp; 1045 } 1046#endif /* CONFIG_IEEE80211R */ 1047 1048#ifdef CONFIG_SAE 1049 if (wpa_auth_uses_sae(sta->wpa_sm) && 1050 sta->auth_alg != WLAN_AUTH_SAE && 1051 !(sta->auth_alg == WLAN_AUTH_FT && 1052 wpa_auth_uses_ft_sae(sta->wpa_sm))) { 1053 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use " 1054 "SAE AKM after non-SAE auth_alg %u", 1055 MAC2STR(sta->addr), sta->auth_alg); 1056 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 1057 } 1058#endif /* CONFIG_SAE */ 1059 1060#ifdef CONFIG_IEEE80211N 1061 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) && 1062 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) { 1063 hostapd_logger(hapd, sta->addr, 1064 HOSTAPD_MODULE_IEEE80211, 1065 HOSTAPD_LEVEL_INFO, 1066 "Station tried to use TKIP with HT " 1067 "association"); 1068 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; 1069 } 1070#endif /* CONFIG_IEEE80211N */ 1071 } else 1072 wpa_auth_sta_no_wpa(sta->wpa_sm); 1073 1074#ifdef CONFIG_P2P 1075 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len); 1076#endif /* CONFIG_P2P */ 1077 1078#ifdef CONFIG_HS20 1079 wpabuf_free(sta->hs20_ie); 1080 if (elems.hs20 && elems.hs20_len > 4) { 1081 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4, 1082 elems.hs20_len - 4); 1083 } else 1084 sta->hs20_ie = NULL; 1085#endif /* CONFIG_HS20 */ 1086 1087 return WLAN_STATUS_SUCCESS; 1088} 1089 1090 1091static void send_deauth(struct hostapd_data *hapd, const u8 *addr, 1092 u16 reason_code) 1093{ 1094 int send_len; 1095 struct ieee80211_mgmt reply; 1096 1097 os_memset(&reply, 0, sizeof(reply)); 1098 reply.frame_control = 1099 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); 1100 os_memcpy(reply.da, addr, ETH_ALEN); 1101 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN); 1102 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN); 1103 1104 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth); 1105 reply.u.deauth.reason_code = host_to_le16(reason_code); 1106 1107 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0) 1108 wpa_printf(MSG_INFO, "Failed to send deauth: %s", 1109 strerror(errno)); 1110} 1111 1112 1113static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta, 1114 u16 status_code, int reassoc, const u8 *ies, 1115 size_t ies_len) 1116{ 1117 int send_len; 1118 u8 buf[sizeof(struct ieee80211_mgmt) + 1024]; 1119 struct ieee80211_mgmt *reply; 1120 u8 *p; 1121 1122 os_memset(buf, 0, sizeof(buf)); 1123 reply = (struct ieee80211_mgmt *) buf; 1124 reply->frame_control = 1125 IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1126 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP : 1127 WLAN_FC_STYPE_ASSOC_RESP)); 1128 os_memcpy(reply->da, sta->addr, ETH_ALEN); 1129 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 1130 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN); 1131 1132 send_len = IEEE80211_HDRLEN; 1133 send_len += sizeof(reply->u.assoc_resp); 1134 reply->u.assoc_resp.capab_info = 1135 host_to_le16(hostapd_own_capab_info(hapd, sta, 0)); 1136 reply->u.assoc_resp.status_code = host_to_le16(status_code); 1137 reply->u.assoc_resp.aid = host_to_le16(sta->aid | BIT(14) | BIT(15)); 1138 /* Supported rates */ 1139 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable); 1140 /* Extended supported rates */ 1141 p = hostapd_eid_ext_supp_rates(hapd, p); 1142 1143#ifdef CONFIG_IEEE80211R 1144 if (status_code == WLAN_STATUS_SUCCESS) { 1145 /* IEEE 802.11r: Mobility Domain Information, Fast BSS 1146 * Transition Information, RSN, [RIC Response] */ 1147 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p, 1148 buf + sizeof(buf) - p, 1149 sta->auth_alg, ies, ies_len); 1150 } 1151#endif /* CONFIG_IEEE80211R */ 1152 1153#ifdef CONFIG_IEEE80211W 1154 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) 1155 p = hostapd_eid_assoc_comeback_time(hapd, sta, p); 1156#endif /* CONFIG_IEEE80211W */ 1157 1158#ifdef CONFIG_IEEE80211N 1159 p = hostapd_eid_ht_capabilities(hapd, p); 1160 p = hostapd_eid_ht_operation(hapd, p); 1161#endif /* CONFIG_IEEE80211N */ 1162 1163#ifdef CONFIG_IEEE80211AC 1164 p = hostapd_eid_vht_capabilities(hapd, p); 1165 p = hostapd_eid_vht_operation(hapd, p); 1166#endif /* CONFIG_IEEE80211AC */ 1167 1168 p = hostapd_eid_ext_capab(hapd, p); 1169 p = hostapd_eid_bss_max_idle_period(hapd, p); 1170 if (sta->qos_map_enabled) 1171 p = hostapd_eid_qos_map_set(hapd, p); 1172 1173 if (sta->flags & WLAN_STA_WMM) 1174 p = hostapd_eid_wmm(hapd, p); 1175 1176#ifdef CONFIG_WPS 1177 if ((sta->flags & WLAN_STA_WPS) || 1178 ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) { 1179 struct wpabuf *wps = wps_build_assoc_resp_ie(); 1180 if (wps) { 1181 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps)); 1182 p += wpabuf_len(wps); 1183 wpabuf_free(wps); 1184 } 1185 } 1186#endif /* CONFIG_WPS */ 1187 1188#ifdef CONFIG_P2P 1189 if (sta->p2p_ie) { 1190 struct wpabuf *p2p_resp_ie; 1191 enum p2p_status_code status; 1192 switch (status_code) { 1193 case WLAN_STATUS_SUCCESS: 1194 status = P2P_SC_SUCCESS; 1195 break; 1196 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA: 1197 status = P2P_SC_FAIL_LIMIT_REACHED; 1198 break; 1199 default: 1200 status = P2P_SC_FAIL_INVALID_PARAMS; 1201 break; 1202 } 1203 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status); 1204 if (p2p_resp_ie) { 1205 os_memcpy(p, wpabuf_head(p2p_resp_ie), 1206 wpabuf_len(p2p_resp_ie)); 1207 p += wpabuf_len(p2p_resp_ie); 1208 wpabuf_free(p2p_resp_ie); 1209 } 1210 } 1211#endif /* CONFIG_P2P */ 1212 1213#ifdef CONFIG_P2P_MANAGER 1214 if (hapd->conf->p2p & P2P_MANAGE) 1215 p = hostapd_eid_p2p_manage(hapd, p); 1216#endif /* CONFIG_P2P_MANAGER */ 1217 1218 send_len += p - reply->u.assoc_resp.variable; 1219 1220 if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0) 1221 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s", 1222 strerror(errno)); 1223} 1224 1225 1226static void handle_assoc(struct hostapd_data *hapd, 1227 const struct ieee80211_mgmt *mgmt, size_t len, 1228 int reassoc) 1229{ 1230 u16 capab_info, listen_interval; 1231 u16 resp = WLAN_STATUS_SUCCESS; 1232 const u8 *pos; 1233 int left, i; 1234 struct sta_info *sta; 1235 1236 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) : 1237 sizeof(mgmt->u.assoc_req))) { 1238 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)", 1239 reassoc, (unsigned long) len); 1240 return; 1241 } 1242 1243#ifdef CONFIG_TESTING_OPTIONS 1244 if (reassoc) { 1245 if (hapd->iconf->ignore_reassoc_probability > 0.0d && 1246 drand48() < hapd->iconf->ignore_reassoc_probability) { 1247 wpa_printf(MSG_INFO, 1248 "TESTING: ignoring reassoc request from " 1249 MACSTR, MAC2STR(mgmt->sa)); 1250 return; 1251 } 1252 } else { 1253 if (hapd->iconf->ignore_assoc_probability > 0.0d && 1254 drand48() < hapd->iconf->ignore_assoc_probability) { 1255 wpa_printf(MSG_INFO, 1256 "TESTING: ignoring assoc request from " 1257 MACSTR, MAC2STR(mgmt->sa)); 1258 return; 1259 } 1260 } 1261#endif /* CONFIG_TESTING_OPTIONS */ 1262 1263 if (reassoc) { 1264 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info); 1265 listen_interval = le_to_host16( 1266 mgmt->u.reassoc_req.listen_interval); 1267 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR 1268 " capab_info=0x%02x listen_interval=%d current_ap=" 1269 MACSTR, 1270 MAC2STR(mgmt->sa), capab_info, listen_interval, 1271 MAC2STR(mgmt->u.reassoc_req.current_ap)); 1272 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req)); 1273 pos = mgmt->u.reassoc_req.variable; 1274 } else { 1275 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info); 1276 listen_interval = le_to_host16( 1277 mgmt->u.assoc_req.listen_interval); 1278 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR 1279 " capab_info=0x%02x listen_interval=%d", 1280 MAC2STR(mgmt->sa), capab_info, listen_interval); 1281 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req)); 1282 pos = mgmt->u.assoc_req.variable; 1283 } 1284 1285 sta = ap_get_sta(hapd, mgmt->sa); 1286#ifdef CONFIG_IEEE80211R 1287 if (sta && sta->auth_alg == WLAN_AUTH_FT && 1288 (sta->flags & WLAN_STA_AUTH) == 0) { 1289 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate " 1290 "prior to authentication since it is using " 1291 "over-the-DS FT", MAC2STR(mgmt->sa)); 1292 } else 1293#endif /* CONFIG_IEEE80211R */ 1294 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) { 1295 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1296 HOSTAPD_LEVEL_INFO, "Station tried to " 1297 "associate before authentication " 1298 "(aid=%d flags=0x%x)", 1299 sta ? sta->aid : -1, 1300 sta ? sta->flags : 0); 1301 send_deauth(hapd, mgmt->sa, 1302 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA); 1303 return; 1304 } 1305 1306 if (hapd->tkip_countermeasures) { 1307 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 1308 goto fail; 1309 } 1310 1311 if (listen_interval > hapd->conf->max_listen_interval) { 1312 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1313 HOSTAPD_LEVEL_DEBUG, 1314 "Too large Listen Interval (%d)", 1315 listen_interval); 1316 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE; 1317 goto fail; 1318 } 1319 1320 /* followed by SSID and Supported rates; and HT capabilities if 802.11n 1321 * is used */ 1322 resp = check_assoc_ies(hapd, sta, pos, left, reassoc); 1323 if (resp != WLAN_STATUS_SUCCESS) 1324 goto fail; 1325 1326 if (hostapd_get_aid(hapd, sta) < 0) { 1327 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1328 HOSTAPD_LEVEL_INFO, "No room for more AIDs"); 1329 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 1330 goto fail; 1331 } 1332 1333 sta->capability = capab_info; 1334 sta->listen_interval = listen_interval; 1335 1336 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) 1337 sta->flags |= WLAN_STA_NONERP; 1338 for (i = 0; i < sta->supported_rates_len; i++) { 1339 if ((sta->supported_rates[i] & 0x7f) > 22) { 1340 sta->flags &= ~WLAN_STA_NONERP; 1341 break; 1342 } 1343 } 1344 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) { 1345 sta->nonerp_set = 1; 1346 hapd->iface->num_sta_non_erp++; 1347 if (hapd->iface->num_sta_non_erp == 1) 1348 ieee802_11_set_beacons(hapd->iface); 1349 } 1350 1351 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) && 1352 !sta->no_short_slot_time_set) { 1353 sta->no_short_slot_time_set = 1; 1354 hapd->iface->num_sta_no_short_slot_time++; 1355 if (hapd->iface->current_mode->mode == 1356 HOSTAPD_MODE_IEEE80211G && 1357 hapd->iface->num_sta_no_short_slot_time == 1) 1358 ieee802_11_set_beacons(hapd->iface); 1359 } 1360 1361 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) 1362 sta->flags |= WLAN_STA_SHORT_PREAMBLE; 1363 else 1364 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; 1365 1366 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && 1367 !sta->no_short_preamble_set) { 1368 sta->no_short_preamble_set = 1; 1369 hapd->iface->num_sta_no_short_preamble++; 1370 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G 1371 && hapd->iface->num_sta_no_short_preamble == 1) 1372 ieee802_11_set_beacons(hapd->iface); 1373 } 1374 1375#ifdef CONFIG_IEEE80211N 1376 update_ht_state(hapd, sta); 1377#endif /* CONFIG_IEEE80211N */ 1378 1379 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1380 HOSTAPD_LEVEL_DEBUG, 1381 "association OK (aid %d)", sta->aid); 1382 /* Station will be marked associated, after it acknowledges AssocResp 1383 */ 1384 sta->flags |= WLAN_STA_ASSOC_REQ_OK; 1385 1386#ifdef CONFIG_IEEE80211W 1387 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) { 1388 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out " 1389 "SA Query procedure", reassoc ? "re" : ""); 1390 /* TODO: Send a protected Disassociate frame to the STA using 1391 * the old key and Reason Code "Previous Authentication no 1392 * longer valid". Make sure this is only sent protected since 1393 * unprotected frame would be received by the STA that is now 1394 * trying to associate. 1395 */ 1396 } 1397#endif /* CONFIG_IEEE80211W */ 1398 1399 if (reassoc) { 1400 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap, 1401 ETH_ALEN); 1402 } 1403 1404 if (sta->last_assoc_req) 1405 os_free(sta->last_assoc_req); 1406 sta->last_assoc_req = os_malloc(len); 1407 if (sta->last_assoc_req) 1408 os_memcpy(sta->last_assoc_req, mgmt, len); 1409 1410 /* Make sure that the previously registered inactivity timer will not 1411 * remove the STA immediately. */ 1412 sta->timeout_next = STA_NULLFUNC; 1413 1414 fail: 1415 send_assoc_resp(hapd, sta, resp, reassoc, pos, left); 1416} 1417 1418 1419static void handle_disassoc(struct hostapd_data *hapd, 1420 const struct ieee80211_mgmt *mgmt, size_t len) 1421{ 1422 struct sta_info *sta; 1423 1424 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) { 1425 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)", 1426 (unsigned long) len); 1427 return; 1428 } 1429 1430 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d", 1431 MAC2STR(mgmt->sa), 1432 le_to_host16(mgmt->u.disassoc.reason_code)); 1433 1434 sta = ap_get_sta(hapd, mgmt->sa); 1435 if (sta == NULL) { 1436 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated", 1437 MAC2STR(mgmt->sa)); 1438 return; 1439 } 1440 1441 ap_sta_set_authorized(hapd, sta, 0); 1442 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK); 1443 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC); 1444 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1445 HOSTAPD_LEVEL_INFO, "disassociated"); 1446 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1447 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 1448 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA 1449 * authenticated. */ 1450 accounting_sta_stop(hapd, sta); 1451 ieee802_1x_free_station(sta); 1452 hostapd_drv_sta_remove(hapd, sta->addr); 1453 1454 if (sta->timeout_next == STA_NULLFUNC || 1455 sta->timeout_next == STA_DISASSOC) { 1456 sta->timeout_next = STA_DEAUTH; 1457 eloop_cancel_timeout(ap_handle_timer, hapd, sta); 1458 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer, 1459 hapd, sta); 1460 } 1461 1462 mlme_disassociate_indication( 1463 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code)); 1464} 1465 1466 1467static void handle_deauth(struct hostapd_data *hapd, 1468 const struct ieee80211_mgmt *mgmt, size_t len) 1469{ 1470 struct sta_info *sta; 1471 1472 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) { 1473 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short " 1474 "payload (len=%lu)", (unsigned long) len); 1475 return; 1476 } 1477 1478 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR 1479 " reason_code=%d", 1480 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code)); 1481 1482 sta = ap_get_sta(hapd, mgmt->sa); 1483 if (sta == NULL) { 1484 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying " 1485 "to deauthenticate, but it is not authenticated", 1486 MAC2STR(mgmt->sa)); 1487 return; 1488 } 1489 1490 ap_sta_set_authorized(hapd, sta, 0); 1491 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | 1492 WLAN_STA_ASSOC_REQ_OK); 1493 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH); 1494 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1495 HOSTAPD_LEVEL_DEBUG, "deauthenticated"); 1496 mlme_deauthenticate_indication( 1497 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code)); 1498 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1499 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 1500 ap_free_sta(hapd, sta); 1501} 1502 1503 1504static void handle_beacon(struct hostapd_data *hapd, 1505 const struct ieee80211_mgmt *mgmt, size_t len, 1506 struct hostapd_frame_info *fi) 1507{ 1508 struct ieee802_11_elems elems; 1509 1510 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) { 1511 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)", 1512 (unsigned long) len); 1513 return; 1514 } 1515 1516 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable, 1517 len - (IEEE80211_HDRLEN + 1518 sizeof(mgmt->u.beacon)), &elems, 1519 0); 1520 1521 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi); 1522} 1523 1524 1525#ifdef CONFIG_IEEE80211W 1526 1527static int hostapd_sa_query_action(struct hostapd_data *hapd, 1528 const struct ieee80211_mgmt *mgmt, 1529 size_t len) 1530{ 1531 const u8 *end; 1532 1533 end = mgmt->u.action.u.sa_query_resp.trans_id + 1534 WLAN_SA_QUERY_TR_ID_LEN; 1535 if (((u8 *) mgmt) + len < end) { 1536 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action " 1537 "frame (len=%lu)", (unsigned long) len); 1538 return 0; 1539 } 1540 1541 ieee802_11_sa_query_action(hapd, mgmt->sa, 1542 mgmt->u.action.u.sa_query_resp.action, 1543 mgmt->u.action.u.sa_query_resp.trans_id); 1544 return 1; 1545} 1546 1547 1548static int robust_action_frame(u8 category) 1549{ 1550 return category != WLAN_ACTION_PUBLIC && 1551 category != WLAN_ACTION_HT; 1552} 1553#endif /* CONFIG_IEEE80211W */ 1554 1555 1556static int handle_action(struct hostapd_data *hapd, 1557 const struct ieee80211_mgmt *mgmt, size_t len) 1558{ 1559 struct sta_info *sta; 1560 sta = ap_get_sta(hapd, mgmt->sa); 1561 1562 if (len < IEEE80211_HDRLEN + 1) { 1563 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1564 HOSTAPD_LEVEL_DEBUG, 1565 "handle_action - too short payload (len=%lu)", 1566 (unsigned long) len); 1567 return 0; 1568 } 1569 1570 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC && 1571 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) { 1572 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action " 1573 "frame (category=%u) from unassociated STA " MACSTR, 1574 MAC2STR(mgmt->sa), mgmt->u.action.category); 1575 return 0; 1576 } 1577 1578#ifdef CONFIG_IEEE80211W 1579 if (sta && (sta->flags & WLAN_STA_MFP) && 1580 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) && 1581 robust_action_frame(mgmt->u.action.category)) { 1582 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1583 HOSTAPD_LEVEL_DEBUG, 1584 "Dropped unprotected Robust Action frame from " 1585 "an MFP STA"); 1586 return 0; 1587 } 1588#endif /* CONFIG_IEEE80211W */ 1589 1590 switch (mgmt->u.action.category) { 1591#ifdef CONFIG_IEEE80211R 1592 case WLAN_ACTION_FT: 1593 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action, 1594 len - IEEE80211_HDRLEN)) 1595 break; 1596 return 1; 1597#endif /* CONFIG_IEEE80211R */ 1598 case WLAN_ACTION_WMM: 1599 hostapd_wmm_action(hapd, mgmt, len); 1600 return 1; 1601#ifdef CONFIG_IEEE80211W 1602 case WLAN_ACTION_SA_QUERY: 1603 return hostapd_sa_query_action(hapd, mgmt, len); 1604#endif /* CONFIG_IEEE80211W */ 1605#ifdef CONFIG_WNM 1606 case WLAN_ACTION_WNM: 1607 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len); 1608 return 1; 1609#endif /* CONFIG_WNM */ 1610 case WLAN_ACTION_PUBLIC: 1611 case WLAN_ACTION_PROTECTED_DUAL: 1612 if (hapd->public_action_cb) { 1613 hapd->public_action_cb(hapd->public_action_cb_ctx, 1614 (u8 *) mgmt, len, 1615 hapd->iface->freq); 1616 } 1617 if (hapd->public_action_cb2) { 1618 hapd->public_action_cb2(hapd->public_action_cb2_ctx, 1619 (u8 *) mgmt, len, 1620 hapd->iface->freq); 1621 } 1622 if (hapd->public_action_cb || hapd->public_action_cb2) 1623 return 1; 1624 break; 1625 case WLAN_ACTION_VENDOR_SPECIFIC: 1626 if (hapd->vendor_action_cb) { 1627 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx, 1628 (u8 *) mgmt, len, 1629 hapd->iface->freq) == 0) 1630 return 1; 1631 } 1632 break; 1633 } 1634 1635 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1636 HOSTAPD_LEVEL_DEBUG, 1637 "handle_action - unknown action category %d or invalid " 1638 "frame", 1639 mgmt->u.action.category); 1640 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) && 1641 !(mgmt->sa[0] & 0x01)) { 1642 struct ieee80211_mgmt *resp; 1643 1644 /* 1645 * IEEE 802.11-REVma/D9.0 - 7.3.1.11 1646 * Return the Action frame to the source without change 1647 * except that MSB of the Category set to 1. 1648 */ 1649 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action " 1650 "frame back to sender"); 1651 resp = os_malloc(len); 1652 if (resp == NULL) 1653 return 0; 1654 os_memcpy(resp, mgmt, len); 1655 os_memcpy(resp->da, resp->sa, ETH_ALEN); 1656 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); 1657 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); 1658 resp->u.action.category |= 0x80; 1659 1660 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) { 1661 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send " 1662 "Action frame"); 1663 } 1664 os_free(resp); 1665 } 1666 1667 return 1; 1668} 1669 1670 1671/** 1672 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames 1673 * @hapd: hostapd BSS data structure (the BSS to which the management frame was 1674 * sent to) 1675 * @buf: management frame data (starting from IEEE 802.11 header) 1676 * @len: length of frame data in octets 1677 * @fi: meta data about received frame (signal level, etc.) 1678 * 1679 * Process all incoming IEEE 802.11 management frames. This will be called for 1680 * each frame received from the kernel driver through wlan#ap interface. In 1681 * addition, it can be called to re-inserted pending frames (e.g., when using 1682 * external RADIUS server as an MAC ACL). 1683 */ 1684int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len, 1685 struct hostapd_frame_info *fi) 1686{ 1687 struct ieee80211_mgmt *mgmt; 1688 int broadcast; 1689 u16 fc, stype; 1690 int ret = 0; 1691 1692#ifdef CONFIG_TESTING_OPTIONS 1693 if (hapd->ext_mgmt_frame_handling) { 1694 size_t hex_len = 2 * len + 1; 1695 char *hex = os_malloc(hex_len); 1696 if (hex) { 1697 wpa_snprintf_hex(hex, hex_len, buf, len); 1698 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-RX %s", hex); 1699 os_free(hex); 1700 } 1701 return 1; 1702 } 1703#endif /* CONFIG_TESTING_OPTIONS */ 1704 1705 if (len < 24) 1706 return 0; 1707 1708 mgmt = (struct ieee80211_mgmt *) buf; 1709 fc = le_to_host16(mgmt->frame_control); 1710 stype = WLAN_FC_GET_STYPE(fc); 1711 1712 if (stype == WLAN_FC_STYPE_BEACON) { 1713 handle_beacon(hapd, mgmt, len, fi); 1714 return 1; 1715 } 1716 1717 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff && 1718 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff && 1719 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff; 1720 1721 if (!broadcast && 1722#ifdef CONFIG_P2P 1723 /* Invitation responses can be sent with the peer MAC as BSSID */ 1724 !((hapd->conf->p2p & P2P_GROUP_OWNER) && 1725 stype == WLAN_FC_STYPE_ACTION) && 1726#endif /* CONFIG_P2P */ 1727 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) { 1728 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address", 1729 MAC2STR(mgmt->bssid)); 1730 return 0; 1731 } 1732 1733 1734 if (stype == WLAN_FC_STYPE_PROBE_REQ) { 1735 handle_probe_req(hapd, mgmt, len, fi->ssi_signal); 1736 return 1; 1737 } 1738 1739 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) { 1740 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1741 HOSTAPD_LEVEL_DEBUG, 1742 "MGMT: DA=" MACSTR " not our address", 1743 MAC2STR(mgmt->da)); 1744 return 0; 1745 } 1746 1747 switch (stype) { 1748 case WLAN_FC_STYPE_AUTH: 1749 wpa_printf(MSG_DEBUG, "mgmt::auth"); 1750 handle_auth(hapd, mgmt, len); 1751 ret = 1; 1752 break; 1753 case WLAN_FC_STYPE_ASSOC_REQ: 1754 wpa_printf(MSG_DEBUG, "mgmt::assoc_req"); 1755 handle_assoc(hapd, mgmt, len, 0); 1756 ret = 1; 1757 break; 1758 case WLAN_FC_STYPE_REASSOC_REQ: 1759 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req"); 1760 handle_assoc(hapd, mgmt, len, 1); 1761 ret = 1; 1762 break; 1763 case WLAN_FC_STYPE_DISASSOC: 1764 wpa_printf(MSG_DEBUG, "mgmt::disassoc"); 1765 handle_disassoc(hapd, mgmt, len); 1766 ret = 1; 1767 break; 1768 case WLAN_FC_STYPE_DEAUTH: 1769 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth"); 1770 handle_deauth(hapd, mgmt, len); 1771 ret = 1; 1772 break; 1773 case WLAN_FC_STYPE_ACTION: 1774 wpa_printf(MSG_DEBUG, "mgmt::action"); 1775 ret = handle_action(hapd, mgmt, len); 1776 break; 1777 default: 1778 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1779 HOSTAPD_LEVEL_DEBUG, 1780 "unknown mgmt frame subtype %d", stype); 1781 break; 1782 } 1783 1784 return ret; 1785} 1786 1787 1788static void handle_auth_cb(struct hostapd_data *hapd, 1789 const struct ieee80211_mgmt *mgmt, 1790 size_t len, int ok) 1791{ 1792 u16 auth_alg, auth_transaction, status_code; 1793 struct sta_info *sta; 1794 1795 if (!ok) { 1796 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1797 HOSTAPD_LEVEL_NOTICE, 1798 "did not acknowledge authentication response"); 1799 return; 1800 } 1801 1802 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 1803 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)", 1804 (unsigned long) len); 1805 return; 1806 } 1807 1808 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 1809 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 1810 status_code = le_to_host16(mgmt->u.auth.status_code); 1811 1812 sta = ap_get_sta(hapd, mgmt->da); 1813 if (!sta) { 1814 wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found", 1815 MAC2STR(mgmt->da)); 1816 return; 1817 } 1818 1819 if (status_code == WLAN_STATUS_SUCCESS && 1820 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || 1821 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { 1822 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1823 HOSTAPD_LEVEL_INFO, "authenticated"); 1824 sta->flags |= WLAN_STA_AUTH; 1825 } 1826} 1827 1828 1829static void hostapd_set_wds_encryption(struct hostapd_data *hapd, 1830 struct sta_info *sta, 1831 char *ifname_wds) 1832{ 1833 int i; 1834 struct hostapd_ssid *ssid = sta->ssid; 1835 1836 if (hapd->conf->ieee802_1x || hapd->conf->wpa) 1837 return; 1838 1839 for (i = 0; i < 4; i++) { 1840 if (ssid->wep.key[i] && 1841 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i, 1842 i == ssid->wep.idx, NULL, 0, 1843 ssid->wep.key[i], ssid->wep.len[i])) { 1844 wpa_printf(MSG_WARNING, 1845 "Could not set WEP keys for WDS interface; %s", 1846 ifname_wds); 1847 break; 1848 } 1849 } 1850} 1851 1852 1853static void handle_assoc_cb(struct hostapd_data *hapd, 1854 const struct ieee80211_mgmt *mgmt, 1855 size_t len, int reassoc, int ok) 1856{ 1857 u16 status; 1858 struct sta_info *sta; 1859 int new_assoc = 1; 1860 struct ieee80211_ht_capabilities ht_cap; 1861 struct ieee80211_vht_capabilities vht_cap; 1862 1863 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) : 1864 sizeof(mgmt->u.assoc_resp))) { 1865 wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)", 1866 reassoc, (unsigned long) len); 1867 return; 1868 } 1869 1870 sta = ap_get_sta(hapd, mgmt->da); 1871 if (!sta) { 1872 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found", 1873 MAC2STR(mgmt->da)); 1874 return; 1875 } 1876 1877 if (!ok) { 1878 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1879 HOSTAPD_LEVEL_DEBUG, 1880 "did not acknowledge association response"); 1881 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK; 1882 return; 1883 } 1884 1885 if (reassoc) 1886 status = le_to_host16(mgmt->u.reassoc_resp.status_code); 1887 else 1888 status = le_to_host16(mgmt->u.assoc_resp.status_code); 1889 1890 if (status != WLAN_STATUS_SUCCESS) 1891 goto fail; 1892 1893 /* Stop previous accounting session, if one is started, and allocate 1894 * new session id for the new session. */ 1895 accounting_sta_stop(hapd, sta); 1896 1897 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1898 HOSTAPD_LEVEL_INFO, 1899 "associated (aid %d)", 1900 sta->aid); 1901 1902 if (sta->flags & WLAN_STA_ASSOC) 1903 new_assoc = 0; 1904 sta->flags |= WLAN_STA_ASSOC; 1905 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE; 1906 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) || 1907 sta->auth_alg == WLAN_AUTH_FT) { 1908 /* 1909 * Open, static WEP, or FT protocol; no separate authorization 1910 * step. 1911 */ 1912 ap_sta_set_authorized(hapd, sta, 1); 1913 } 1914 1915 if (reassoc) 1916 mlme_reassociate_indication(hapd, sta); 1917 else 1918 mlme_associate_indication(hapd, sta); 1919 1920#ifdef CONFIG_IEEE80211W 1921 sta->sa_query_timed_out = 0; 1922#endif /* CONFIG_IEEE80211W */ 1923 1924 /* 1925 * Remove the STA entry in order to make sure the STA PS state gets 1926 * cleared and configuration gets updated in case of reassociation back 1927 * to the same AP. 1928 */ 1929 hostapd_drv_sta_remove(hapd, sta->addr); 1930 1931#ifdef CONFIG_IEEE80211N 1932 if (sta->flags & WLAN_STA_HT) 1933 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap); 1934#endif /* CONFIG_IEEE80211N */ 1935#ifdef CONFIG_IEEE80211AC 1936 if (sta->flags & WLAN_STA_VHT) 1937 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap); 1938#endif /* CONFIG_IEEE80211AC */ 1939 1940 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability, 1941 sta->supported_rates, sta->supported_rates_len, 1942 sta->listen_interval, 1943 sta->flags & WLAN_STA_HT ? &ht_cap : NULL, 1944 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL, 1945 sta->flags, sta->qosinfo, sta->vht_opmode)) { 1946 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1947 HOSTAPD_LEVEL_NOTICE, 1948 "Could not add STA to kernel driver"); 1949 1950 ap_sta_disconnect(hapd, sta, sta->addr, 1951 WLAN_REASON_DISASSOC_AP_BUSY); 1952 1953 goto fail; 1954 } 1955 1956 if (sta->flags & WLAN_STA_WDS) { 1957 int ret; 1958 char ifname_wds[IFNAMSIZ + 1]; 1959 1960 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr, 1961 sta->aid, 1); 1962 if (!ret) 1963 hostapd_set_wds_encryption(hapd, sta, ifname_wds); 1964 } 1965 1966 if (sta->eapol_sm == NULL) { 1967 /* 1968 * This STA does not use RADIUS server for EAP authentication, 1969 * so bind it to the selected VLAN interface now, since the 1970 * interface selection is not going to change anymore. 1971 */ 1972 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1973 goto fail; 1974 } else if (sta->vlan_id) { 1975 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */ 1976 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1977 goto fail; 1978 } 1979 1980 hostapd_set_sta_flags(hapd, sta); 1981 1982 if (sta->auth_alg == WLAN_AUTH_FT) 1983 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); 1984 else 1985 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); 1986 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc); 1987 1988 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); 1989 1990 fail: 1991 /* Copy of the association request is not needed anymore */ 1992 if (sta->last_assoc_req) { 1993 os_free(sta->last_assoc_req); 1994 sta->last_assoc_req = NULL; 1995 } 1996} 1997 1998 1999static void handle_deauth_cb(struct hostapd_data *hapd, 2000 const struct ieee80211_mgmt *mgmt, 2001 size_t len, int ok) 2002{ 2003 struct sta_info *sta; 2004 if (mgmt->da[0] & 0x01) 2005 return; 2006 sta = ap_get_sta(hapd, mgmt->da); 2007 if (!sta) { 2008 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR 2009 " not found", MAC2STR(mgmt->da)); 2010 return; 2011 } 2012 if (ok) 2013 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth", 2014 MAC2STR(sta->addr)); 2015 else 2016 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2017 "deauth", MAC2STR(sta->addr)); 2018 2019 ap_sta_deauth_cb(hapd, sta); 2020} 2021 2022 2023static void handle_disassoc_cb(struct hostapd_data *hapd, 2024 const struct ieee80211_mgmt *mgmt, 2025 size_t len, int ok) 2026{ 2027 struct sta_info *sta; 2028 if (mgmt->da[0] & 0x01) 2029 return; 2030 sta = ap_get_sta(hapd, mgmt->da); 2031 if (!sta) { 2032 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR 2033 " not found", MAC2STR(mgmt->da)); 2034 return; 2035 } 2036 if (ok) 2037 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc", 2038 MAC2STR(sta->addr)); 2039 else 2040 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2041 "disassoc", MAC2STR(sta->addr)); 2042 2043 ap_sta_disassoc_cb(hapd, sta); 2044} 2045 2046 2047/** 2048 * ieee802_11_mgmt_cb - Process management frame TX status callback 2049 * @hapd: hostapd BSS data structure (the BSS from which the management frame 2050 * was sent from) 2051 * @buf: management frame data (starting from IEEE 802.11 header) 2052 * @len: length of frame data in octets 2053 * @stype: management frame subtype from frame control field 2054 * @ok: Whether the frame was ACK'ed 2055 */ 2056void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len, 2057 u16 stype, int ok) 2058{ 2059 const struct ieee80211_mgmt *mgmt; 2060 mgmt = (const struct ieee80211_mgmt *) buf; 2061 2062#ifdef CONFIG_TESTING_OPTIONS 2063 if (hapd->ext_mgmt_frame_handling) { 2064 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d", 2065 stype, ok); 2066 return; 2067 } 2068#endif /* CONFIG_TESTING_OPTIONS */ 2069 2070 switch (stype) { 2071 case WLAN_FC_STYPE_AUTH: 2072 wpa_printf(MSG_DEBUG, "mgmt::auth cb"); 2073 handle_auth_cb(hapd, mgmt, len, ok); 2074 break; 2075 case WLAN_FC_STYPE_ASSOC_RESP: 2076 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb"); 2077 handle_assoc_cb(hapd, mgmt, len, 0, ok); 2078 break; 2079 case WLAN_FC_STYPE_REASSOC_RESP: 2080 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb"); 2081 handle_assoc_cb(hapd, mgmt, len, 1, ok); 2082 break; 2083 case WLAN_FC_STYPE_PROBE_RESP: 2084 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb"); 2085 break; 2086 case WLAN_FC_STYPE_DEAUTH: 2087 wpa_printf(MSG_DEBUG, "mgmt::deauth cb"); 2088 handle_deauth_cb(hapd, mgmt, len, ok); 2089 break; 2090 case WLAN_FC_STYPE_DISASSOC: 2091 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb"); 2092 handle_disassoc_cb(hapd, mgmt, len, ok); 2093 break; 2094 case WLAN_FC_STYPE_ACTION: 2095 wpa_printf(MSG_DEBUG, "mgmt::action cb"); 2096 break; 2097 default: 2098 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype); 2099 break; 2100 } 2101} 2102 2103 2104int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 2105{ 2106 /* TODO */ 2107 return 0; 2108} 2109 2110 2111int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 2112 char *buf, size_t buflen) 2113{ 2114 /* TODO */ 2115 return 0; 2116} 2117 2118 2119void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr, 2120 const u8 *buf, size_t len, int ack) 2121{ 2122 struct sta_info *sta; 2123 struct hostapd_iface *iface = hapd->iface; 2124 2125 sta = ap_get_sta(hapd, addr); 2126 if (sta == NULL && iface->num_bss > 1) { 2127 size_t j; 2128 for (j = 0; j < iface->num_bss; j++) { 2129 hapd = iface->bss[j]; 2130 sta = ap_get_sta(hapd, addr); 2131 if (sta) 2132 break; 2133 } 2134 } 2135 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) 2136 return; 2137 if (sta->flags & WLAN_STA_PENDING_POLL) { 2138 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending " 2139 "activity poll", MAC2STR(sta->addr), 2140 ack ? "ACKed" : "did not ACK"); 2141 if (ack) 2142 sta->flags &= ~WLAN_STA_PENDING_POLL; 2143 } 2144 2145 ieee802_1x_tx_status(hapd, sta, buf, len, ack); 2146} 2147 2148 2149void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst, 2150 const u8 *data, size_t len, int ack) 2151{ 2152 struct sta_info *sta; 2153 struct hostapd_iface *iface = hapd->iface; 2154 2155 sta = ap_get_sta(hapd, dst); 2156 if (sta == NULL && iface->num_bss > 1) { 2157 size_t j; 2158 for (j = 0; j < iface->num_bss; j++) { 2159 hapd = iface->bss[j]; 2160 sta = ap_get_sta(hapd, dst); 2161 if (sta) 2162 break; 2163 } 2164 } 2165 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 2166 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA " 2167 MACSTR " that is not currently associated", 2168 MAC2STR(dst)); 2169 return; 2170 } 2171 2172 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack); 2173} 2174 2175 2176void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr) 2177{ 2178 struct sta_info *sta; 2179 struct hostapd_iface *iface = hapd->iface; 2180 2181 sta = ap_get_sta(hapd, addr); 2182 if (sta == NULL && iface->num_bss > 1) { 2183 size_t j; 2184 for (j = 0; j < iface->num_bss; j++) { 2185 hapd = iface->bss[j]; 2186 sta = ap_get_sta(hapd, addr); 2187 if (sta) 2188 break; 2189 } 2190 } 2191 if (sta == NULL) 2192 return; 2193 if (!(sta->flags & WLAN_STA_PENDING_POLL)) 2194 return; 2195 2196 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending " 2197 "activity poll", MAC2STR(sta->addr)); 2198 sta->flags &= ~WLAN_STA_PENDING_POLL; 2199} 2200 2201 2202void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src, 2203 int wds) 2204{ 2205 struct sta_info *sta; 2206 2207 sta = ap_get_sta(hapd, src); 2208 if (sta && (sta->flags & WLAN_STA_ASSOC)) { 2209 if (!hapd->conf->wds_sta) 2210 return; 2211 2212 if (wds && !(sta->flags & WLAN_STA_WDS)) { 2213 int ret; 2214 char ifname_wds[IFNAMSIZ + 1]; 2215 2216 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for " 2217 "STA " MACSTR " (aid %u)", 2218 MAC2STR(sta->addr), sta->aid); 2219 sta->flags |= WLAN_STA_WDS; 2220 ret = hostapd_set_wds_sta(hapd, ifname_wds, 2221 sta->addr, sta->aid, 1); 2222 if (!ret) 2223 hostapd_set_wds_encryption(hapd, sta, 2224 ifname_wds); 2225 } 2226 return; 2227 } 2228 2229 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA " 2230 MACSTR, MAC2STR(src)); 2231 if (src[0] & 0x01) { 2232 /* Broadcast bit set in SA?! Ignore the frame silently. */ 2233 return; 2234 } 2235 2236 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) { 2237 wpa_printf(MSG_DEBUG, "Association Response to the STA has " 2238 "already been sent, but no TX status yet known - " 2239 "ignore Class 3 frame issue with " MACSTR, 2240 MAC2STR(src)); 2241 return; 2242 } 2243 2244 if (sta && (sta->flags & WLAN_STA_AUTH)) 2245 hostapd_drv_sta_disassoc( 2246 hapd, src, 2247 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2248 else 2249 hostapd_drv_sta_deauth( 2250 hapd, src, 2251 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2252} 2253 2254 2255#endif /* CONFIG_NATIVE_WINDOWS */ 2256