ieee802_11.c revision fb79edc9df1f20461e90e478363d207348213d35
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 181void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len) 182{ 183 int i; 184 if (len > HOSTAPD_MAX_SSID_LEN) 185 len = HOSTAPD_MAX_SSID_LEN; 186 for (i = 0; i < len; i++) { 187 if (ssid[i] >= 32 && ssid[i] < 127) 188 buf[i] = ssid[i]; 189 else 190 buf[i] = '.'; 191 } 192 buf[len] = '\0'; 193} 194 195 196static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta, 197 u16 auth_transaction, const u8 *challenge, 198 int iswep) 199{ 200 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 201 HOSTAPD_LEVEL_DEBUG, 202 "authentication (shared key, transaction %d)", 203 auth_transaction); 204 205 if (auth_transaction == 1) { 206 if (!sta->challenge) { 207 /* Generate a pseudo-random challenge */ 208 u8 key[8]; 209 struct os_time now; 210 int r; 211 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN); 212 if (sta->challenge == NULL) 213 return WLAN_STATUS_UNSPECIFIED_FAILURE; 214 215 os_get_time(&now); 216 r = os_random(); 217 os_memcpy(key, &now.sec, 4); 218 os_memcpy(key + 4, &r, 4); 219 rc4_skip(key, sizeof(key), 0, 220 sta->challenge, WLAN_AUTH_CHALLENGE_LEN); 221 } 222 return 0; 223 } 224 225 if (auth_transaction != 3) 226 return WLAN_STATUS_UNSPECIFIED_FAILURE; 227 228 /* Transaction 3 */ 229 if (!iswep || !sta->challenge || !challenge || 230 os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) { 231 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 232 HOSTAPD_LEVEL_INFO, 233 "shared key authentication - invalid " 234 "challenge-response"); 235 return WLAN_STATUS_CHALLENGE_FAIL; 236 } 237 238 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 239 HOSTAPD_LEVEL_DEBUG, 240 "authentication OK (shared key)"); 241 sta->flags |= WLAN_STA_AUTH; 242 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 243 os_free(sta->challenge); 244 sta->challenge = NULL; 245 246 return 0; 247} 248 249 250static void send_auth_reply(struct hostapd_data *hapd, 251 const u8 *dst, const u8 *bssid, 252 u16 auth_alg, u16 auth_transaction, u16 resp, 253 const u8 *ies, size_t ies_len) 254{ 255 struct ieee80211_mgmt *reply; 256 u8 *buf; 257 size_t rlen; 258 259 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len; 260 buf = os_zalloc(rlen); 261 if (buf == NULL) 262 return; 263 264 reply = (struct ieee80211_mgmt *) buf; 265 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 266 WLAN_FC_STYPE_AUTH); 267 os_memcpy(reply->da, dst, ETH_ALEN); 268 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 269 os_memcpy(reply->bssid, bssid, ETH_ALEN); 270 271 reply->u.auth.auth_alg = host_to_le16(auth_alg); 272 reply->u.auth.auth_transaction = host_to_le16(auth_transaction); 273 reply->u.auth.status_code = host_to_le16(resp); 274 275 if (ies && ies_len) 276 os_memcpy(reply->u.auth.variable, ies, ies_len); 277 278 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR 279 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)", 280 MAC2STR(dst), auth_alg, auth_transaction, 281 resp, (unsigned long) ies_len); 282 if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0) 283 wpa_printf(MSG_INFO, "send_auth_reply: send"); 284 285 os_free(buf); 286} 287 288 289#ifdef CONFIG_IEEE80211R 290static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid, 291 u16 auth_transaction, u16 status, 292 const u8 *ies, size_t ies_len) 293{ 294 struct hostapd_data *hapd = ctx; 295 struct sta_info *sta; 296 297 send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction, 298 status, ies, ies_len); 299 300 if (status != WLAN_STATUS_SUCCESS) 301 return; 302 303 sta = ap_get_sta(hapd, dst); 304 if (sta == NULL) 305 return; 306 307 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211, 308 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)"); 309 sta->flags |= WLAN_STA_AUTH; 310 mlme_authenticate_indication(hapd, sta); 311} 312#endif /* CONFIG_IEEE80211R */ 313 314 315#ifdef CONFIG_SAE 316 317static struct wpabuf * auth_process_sae_commit(struct hostapd_data *hapd, 318 struct sta_info *sta) 319{ 320 struct wpabuf *buf; 321 322 if (hapd->conf->ssid.wpa_passphrase == NULL) { 323 wpa_printf(MSG_DEBUG, "SAE: No password available"); 324 return NULL; 325 } 326 327 if (sae_prepare_commit(hapd->own_addr, sta->addr, 328 (u8 *) hapd->conf->ssid.wpa_passphrase, 329 os_strlen(hapd->conf->ssid.wpa_passphrase), 330 sta->sae) < 0) { 331 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); 332 return NULL; 333 } 334 335 if (sae_process_commit(sta->sae) < 0) { 336 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer commit"); 337 return NULL; 338 } 339 340 buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN); 341 if (buf == NULL) 342 return NULL; 343 sae_write_commit(sta->sae, buf, NULL); 344 345 return buf; 346} 347 348 349static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd, 350 struct sta_info *sta) 351{ 352 struct wpabuf *buf; 353 354 buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN); 355 if (buf == NULL) 356 return NULL; 357 358 sae_write_confirm(sta->sae, buf); 359 360 return buf; 361} 362 363 364static int use_sae_anti_clogging(struct hostapd_data *hapd) 365{ 366 struct sta_info *sta; 367 unsigned int open = 0; 368 369 if (hapd->conf->sae_anti_clogging_threshold == 0) 370 return 1; 371 372 for (sta = hapd->sta_list; sta; sta = sta->next) { 373 if (!sta->sae) 374 continue; 375 if (sta->sae->state != SAE_COMMITTED && 376 sta->sae->state != SAE_CONFIRMED) 377 continue; 378 open++; 379 if (open >= hapd->conf->sae_anti_clogging_threshold) 380 return 1; 381 } 382 383 return 0; 384} 385 386 387static int check_sae_token(struct hostapd_data *hapd, const u8 *addr, 388 const u8 *token, size_t token_len) 389{ 390 u8 mac[SHA256_MAC_LEN]; 391 392 if (token_len != SHA256_MAC_LEN) 393 return -1; 394 if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), 395 addr, ETH_ALEN, mac) < 0 || 396 os_memcmp(token, mac, SHA256_MAC_LEN) != 0) 397 return -1; 398 399 return 0; 400} 401 402 403static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd, 404 const u8 *addr) 405{ 406 struct wpabuf *buf; 407 u8 *token; 408 struct os_reltime now; 409 410 os_get_reltime(&now); 411 if (!os_reltime_initialized(&hapd->last_sae_token_key_update) || 412 os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) { 413 if (random_get_bytes(hapd->sae_token_key, 414 sizeof(hapd->sae_token_key)) < 0) 415 return NULL; 416 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key", 417 hapd->sae_token_key, sizeof(hapd->sae_token_key)); 418 hapd->last_sae_token_key_update = now; 419 } 420 421 buf = wpabuf_alloc(SHA256_MAC_LEN); 422 if (buf == NULL) 423 return NULL; 424 425 token = wpabuf_put(buf, SHA256_MAC_LEN); 426 hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), 427 addr, ETH_ALEN, token); 428 429 return buf; 430} 431 432 433static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta, 434 const struct ieee80211_mgmt *mgmt, size_t len, 435 u8 auth_transaction) 436{ 437 u16 resp = WLAN_STATUS_SUCCESS; 438 struct wpabuf *data = NULL; 439 440 if (!sta->sae) { 441 if (auth_transaction != 1) 442 return; 443 sta->sae = os_zalloc(sizeof(*sta->sae)); 444 if (sta->sae == NULL) 445 return; 446 sta->sae->state = SAE_NOTHING; 447 } 448 449 if (auth_transaction == 1) { 450 const u8 *token = NULL; 451 size_t token_len = 0; 452 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 453 HOSTAPD_LEVEL_DEBUG, 454 "start SAE authentication (RX commit)"); 455 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable, 456 ((const u8 *) mgmt) + len - 457 mgmt->u.auth.variable, &token, 458 &token_len, hapd->conf->sae_groups); 459 if (token && check_sae_token(hapd, sta->addr, token, token_len) 460 < 0) { 461 wpa_printf(MSG_DEBUG, "SAE: Drop commit message with " 462 "incorrect token from " MACSTR, 463 MAC2STR(sta->addr)); 464 return; 465 } 466 467 if (resp == WLAN_STATUS_SUCCESS) { 468 if (!token && use_sae_anti_clogging(hapd)) { 469 wpa_printf(MSG_DEBUG, "SAE: Request anti-" 470 "clogging token from " MACSTR, 471 MAC2STR(sta->addr)); 472 data = auth_build_token_req(hapd, sta->addr); 473 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ; 474 } else { 475 data = auth_process_sae_commit(hapd, sta); 476 if (data == NULL) 477 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 478 else 479 sta->sae->state = SAE_COMMITTED; 480 } 481 } 482 } else if (auth_transaction == 2) { 483 if (sta->sae->state != SAE_COMMITTED) { 484 hostapd_logger(hapd, sta->addr, 485 HOSTAPD_MODULE_IEEE80211, 486 HOSTAPD_LEVEL_DEBUG, 487 "SAE confirm before commit"); 488 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 489 } 490 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 491 HOSTAPD_LEVEL_DEBUG, 492 "SAE authentication (RX confirm)"); 493 if (sae_check_confirm(sta->sae, mgmt->u.auth.variable, 494 ((u8 *) mgmt) + len - 495 mgmt->u.auth.variable) < 0) { 496 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 497 } else { 498 resp = WLAN_STATUS_SUCCESS; 499 sta->flags |= WLAN_STA_AUTH; 500 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 501 sta->auth_alg = WLAN_AUTH_SAE; 502 mlme_authenticate_indication(hapd, sta); 503 504 data = auth_build_sae_confirm(hapd, sta); 505 if (data == NULL) 506 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 507 else { 508 sta->sae->state = SAE_ACCEPTED; 509 sae_clear_temp_data(sta->sae); 510 } 511 } 512 } else { 513 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 514 HOSTAPD_LEVEL_DEBUG, 515 "unexpected SAE authentication transaction %u", 516 auth_transaction); 517 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 518 } 519 520 sta->auth_alg = WLAN_AUTH_SAE; 521 522 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE, 523 auth_transaction, resp, 524 data ? wpabuf_head(data) : (u8 *) "", 525 data ? wpabuf_len(data) : 0); 526 wpabuf_free(data); 527} 528#endif /* CONFIG_SAE */ 529 530 531static void handle_auth(struct hostapd_data *hapd, 532 const struct ieee80211_mgmt *mgmt, size_t len) 533{ 534 u16 auth_alg, auth_transaction, status_code; 535 u16 resp = WLAN_STATUS_SUCCESS; 536 struct sta_info *sta = NULL; 537 int res; 538 u16 fc; 539 const u8 *challenge = NULL; 540 u32 session_timeout, acct_interim_interval; 541 int vlan_id = 0; 542 struct hostapd_sta_wpa_psk_short *psk = NULL; 543 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; 544 size_t resp_ies_len = 0; 545 char *identity = NULL; 546 char *radius_cui = NULL; 547 548 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 549 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)", 550 (unsigned long) len); 551 return; 552 } 553 554#ifdef CONFIG_TESTING_OPTIONS 555 if (hapd->iconf->ignore_auth_probability > 0.0d && 556 drand48() < hapd->iconf->ignore_auth_probability) { 557 wpa_printf(MSG_INFO, 558 "TESTING: ignoring auth frame from " MACSTR, 559 MAC2STR(mgmt->sa)); 560 return; 561 } 562#endif /* CONFIG_TESTING_OPTIONS */ 563 564 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 565 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 566 status_code = le_to_host16(mgmt->u.auth.status_code); 567 fc = le_to_host16(mgmt->frame_control); 568 569 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 570 2 + WLAN_AUTH_CHALLENGE_LEN && 571 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE && 572 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN) 573 challenge = &mgmt->u.auth.variable[2]; 574 575 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d " 576 "auth_transaction=%d status_code=%d wep=%d%s", 577 MAC2STR(mgmt->sa), auth_alg, auth_transaction, 578 status_code, !!(fc & WLAN_FC_ISWEP), 579 challenge ? " challenge" : ""); 580 581 if (hapd->tkip_countermeasures) { 582 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 583 goto fail; 584 } 585 586 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) && 587 auth_alg == WLAN_AUTH_OPEN) || 588#ifdef CONFIG_IEEE80211R 589 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && 590 auth_alg == WLAN_AUTH_FT) || 591#endif /* CONFIG_IEEE80211R */ 592#ifdef CONFIG_SAE 593 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) && 594 auth_alg == WLAN_AUTH_SAE) || 595#endif /* CONFIG_SAE */ 596 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) && 597 auth_alg == WLAN_AUTH_SHARED_KEY))) { 598 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)", 599 auth_alg); 600 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 601 goto fail; 602 } 603 604 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE || 605 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) { 606 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)", 607 auth_transaction); 608 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 609 goto fail; 610 } 611 612 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { 613 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", 614 MAC2STR(mgmt->sa)); 615 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 616 goto fail; 617 } 618 619 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len, 620 &session_timeout, 621 &acct_interim_interval, &vlan_id, 622 &psk, &identity, &radius_cui); 623 624 if (res == HOSTAPD_ACL_REJECT) { 625 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", 626 MAC2STR(mgmt->sa)); 627 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 628 goto fail; 629 } 630 if (res == HOSTAPD_ACL_PENDING) { 631 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR 632 " waiting for an external authentication", 633 MAC2STR(mgmt->sa)); 634 /* Authentication code will re-send the authentication frame 635 * after it has received (and cached) information from the 636 * external source. */ 637 return; 638 } 639 640 sta = ap_sta_add(hapd, mgmt->sa); 641 if (!sta) { 642 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 643 goto fail; 644 } 645 646 if (vlan_id > 0) { 647 if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) { 648 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 649 HOSTAPD_LEVEL_INFO, "Invalid VLAN ID " 650 "%d received from RADIUS server", 651 vlan_id); 652 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 653 goto fail; 654 } 655 sta->vlan_id = vlan_id; 656 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 657 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); 658 } 659 660 hostapd_free_psk_list(sta->psk); 661 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) { 662 sta->psk = psk; 663 psk = NULL; 664 } else { 665 sta->psk = NULL; 666 } 667 668 sta->identity = identity; 669 identity = NULL; 670 sta->radius_cui = radius_cui; 671 radius_cui = NULL; 672 673 sta->flags &= ~WLAN_STA_PREAUTH; 674 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); 675 676 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval) 677 sta->acct_interim_interval = acct_interim_interval; 678 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) 679 ap_sta_session_timeout(hapd, sta, session_timeout); 680 else 681 ap_sta_no_session_timeout(hapd, sta); 682 683 switch (auth_alg) { 684 case WLAN_AUTH_OPEN: 685 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 686 HOSTAPD_LEVEL_DEBUG, 687 "authentication OK (open system)"); 688 sta->flags |= WLAN_STA_AUTH; 689 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 690 sta->auth_alg = WLAN_AUTH_OPEN; 691 mlme_authenticate_indication(hapd, sta); 692 break; 693 case WLAN_AUTH_SHARED_KEY: 694 resp = auth_shared_key(hapd, sta, auth_transaction, challenge, 695 fc & WLAN_FC_ISWEP); 696 sta->auth_alg = WLAN_AUTH_SHARED_KEY; 697 mlme_authenticate_indication(hapd, sta); 698 if (sta->challenge && auth_transaction == 1) { 699 resp_ies[0] = WLAN_EID_CHALLENGE; 700 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN; 701 os_memcpy(resp_ies + 2, sta->challenge, 702 WLAN_AUTH_CHALLENGE_LEN); 703 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN; 704 } 705 break; 706#ifdef CONFIG_IEEE80211R 707 case WLAN_AUTH_FT: 708 sta->auth_alg = WLAN_AUTH_FT; 709 if (sta->wpa_sm == NULL) 710 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 711 sta->addr, NULL); 712 if (sta->wpa_sm == NULL) { 713 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " 714 "state machine"); 715 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 716 goto fail; 717 } 718 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid, 719 auth_transaction, mgmt->u.auth.variable, 720 len - IEEE80211_HDRLEN - 721 sizeof(mgmt->u.auth), 722 handle_auth_ft_finish, hapd); 723 /* handle_auth_ft_finish() callback will complete auth. */ 724 return; 725#endif /* CONFIG_IEEE80211R */ 726#ifdef CONFIG_SAE 727 case WLAN_AUTH_SAE: 728 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction); 729 return; 730#endif /* CONFIG_SAE */ 731 } 732 733 fail: 734 os_free(identity); 735 os_free(radius_cui); 736 hostapd_free_psk_list(psk); 737 738 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg, 739 auth_transaction + 1, resp, resp_ies, resp_ies_len); 740} 741 742 743static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta) 744{ 745 int i, j = 32, aid; 746 747 /* get a unique AID */ 748 if (sta->aid > 0) { 749 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid); 750 return 0; 751 } 752 753 for (i = 0; i < AID_WORDS; i++) { 754 if (hapd->sta_aid[i] == (u32) -1) 755 continue; 756 for (j = 0; j < 32; j++) { 757 if (!(hapd->sta_aid[i] & BIT(j))) 758 break; 759 } 760 if (j < 32) 761 break; 762 } 763 if (j == 32) 764 return -1; 765 aid = i * 32 + j + 1; 766 if (aid > 2007) 767 return -1; 768 769 sta->aid = aid; 770 hapd->sta_aid[i] |= BIT(j); 771 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid); 772 return 0; 773} 774 775 776static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta, 777 const u8 *ssid_ie, size_t ssid_ie_len) 778{ 779 if (ssid_ie == NULL) 780 return WLAN_STATUS_UNSPECIFIED_FAILURE; 781 782 if (ssid_ie_len != hapd->conf->ssid.ssid_len || 783 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) { 784 char ssid_txt[33]; 785 ieee802_11_print_ssid(ssid_txt, ssid_ie, ssid_ie_len); 786 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 787 HOSTAPD_LEVEL_INFO, 788 "Station tried to associate with unknown SSID " 789 "'%s'", ssid_txt); 790 return WLAN_STATUS_UNSPECIFIED_FAILURE; 791 } 792 793 return WLAN_STATUS_SUCCESS; 794} 795 796 797static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta, 798 const u8 *wmm_ie, size_t wmm_ie_len) 799{ 800 sta->flags &= ~WLAN_STA_WMM; 801 sta->qosinfo = 0; 802 if (wmm_ie && hapd->conf->wmm_enabled) { 803 struct wmm_information_element *wmm; 804 805 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) { 806 hostapd_logger(hapd, sta->addr, 807 HOSTAPD_MODULE_WPA, 808 HOSTAPD_LEVEL_DEBUG, 809 "invalid WMM element in association " 810 "request"); 811 return WLAN_STATUS_UNSPECIFIED_FAILURE; 812 } 813 814 sta->flags |= WLAN_STA_WMM; 815 wmm = (struct wmm_information_element *) wmm_ie; 816 sta->qosinfo = wmm->qos_info; 817 } 818 return WLAN_STATUS_SUCCESS; 819} 820 821 822static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta, 823 struct ieee802_11_elems *elems) 824{ 825 if (!elems->supp_rates) { 826 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 827 HOSTAPD_LEVEL_DEBUG, 828 "No supported rates element in AssocReq"); 829 return WLAN_STATUS_UNSPECIFIED_FAILURE; 830 } 831 832 if (elems->supp_rates_len + elems->ext_supp_rates_len > 833 sizeof(sta->supported_rates)) { 834 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 835 HOSTAPD_LEVEL_DEBUG, 836 "Invalid supported rates element length %d+%d", 837 elems->supp_rates_len, 838 elems->ext_supp_rates_len); 839 return WLAN_STATUS_UNSPECIFIED_FAILURE; 840 } 841 842 sta->supported_rates_len = merge_byte_arrays( 843 sta->supported_rates, sizeof(sta->supported_rates), 844 elems->supp_rates, elems->supp_rates_len, 845 elems->ext_supp_rates, elems->ext_supp_rates_len); 846 847 return WLAN_STATUS_SUCCESS; 848} 849 850 851static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta, 852 const u8 *ext_capab_ie, size_t ext_capab_ie_len) 853{ 854#ifdef CONFIG_INTERWORKING 855 /* check for QoS Map support */ 856 if (ext_capab_ie_len >= 5) { 857 if (ext_capab_ie[4] & 0x01) 858 sta->qos_map_enabled = 1; 859 } 860#endif /* CONFIG_INTERWORKING */ 861 862 return WLAN_STATUS_SUCCESS; 863} 864 865 866static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, 867 const u8 *ies, size_t ies_len, int reassoc) 868{ 869 struct ieee802_11_elems elems; 870 u16 resp; 871 const u8 *wpa_ie; 872 size_t wpa_ie_len; 873 const u8 *p2p_dev_addr = NULL; 874 875 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { 876 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 877 HOSTAPD_LEVEL_INFO, "Station sent an invalid " 878 "association request"); 879 return WLAN_STATUS_UNSPECIFIED_FAILURE; 880 } 881 882 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len); 883 if (resp != WLAN_STATUS_SUCCESS) 884 return resp; 885 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len); 886 if (resp != WLAN_STATUS_SUCCESS) 887 return resp; 888 resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len); 889 if (resp != WLAN_STATUS_SUCCESS) 890 return resp; 891 resp = copy_supp_rates(hapd, sta, &elems); 892 if (resp != WLAN_STATUS_SUCCESS) 893 return resp; 894#ifdef CONFIG_IEEE80211N 895 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities, 896 elems.ht_capabilities_len); 897 if (resp != WLAN_STATUS_SUCCESS) 898 return resp; 899 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && 900 !(sta->flags & WLAN_STA_HT)) { 901 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 902 HOSTAPD_LEVEL_INFO, "Station does not support " 903 "mandatory HT PHY - reject association"); 904 return WLAN_STATUS_ASSOC_DENIED_NO_HT; 905 } 906#endif /* CONFIG_IEEE80211N */ 907 908#ifdef CONFIG_IEEE80211AC 909 resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities, 910 elems.vht_capabilities_len); 911 if (resp != WLAN_STATUS_SUCCESS) 912 return resp; 913 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && 914 !(sta->flags & WLAN_STA_VHT)) { 915 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 916 HOSTAPD_LEVEL_INFO, "Station does not support " 917 "mandatory VHT PHY - reject association"); 918 return WLAN_STATUS_ASSOC_DENIED_NO_VHT; 919 } 920#endif /* CONFIG_IEEE80211AC */ 921 922#ifdef CONFIG_P2P 923 if (elems.p2p) { 924 wpabuf_free(sta->p2p_ie); 925 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 926 P2P_IE_VENDOR_TYPE); 927 if (sta->p2p_ie) 928 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie); 929 } else { 930 wpabuf_free(sta->p2p_ie); 931 sta->p2p_ie = NULL; 932 } 933#endif /* CONFIG_P2P */ 934 935 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { 936 wpa_ie = elems.rsn_ie; 937 wpa_ie_len = elems.rsn_ie_len; 938 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) && 939 elems.wpa_ie) { 940 wpa_ie = elems.wpa_ie; 941 wpa_ie_len = elems.wpa_ie_len; 942 } else { 943 wpa_ie = NULL; 944 wpa_ie_len = 0; 945 } 946 947#ifdef CONFIG_WPS 948 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2); 949 if (hapd->conf->wps_state && elems.wps_ie) { 950 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association " 951 "Request - assume WPS is used"); 952 sta->flags |= WLAN_STA_WPS; 953 wpabuf_free(sta->wps_ie); 954 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 955 WPS_IE_VENDOR_TYPE); 956 if (sta->wps_ie && wps_is_20(sta->wps_ie)) { 957 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0"); 958 sta->flags |= WLAN_STA_WPS2; 959 } 960 wpa_ie = NULL; 961 wpa_ie_len = 0; 962 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) { 963 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in " 964 "(Re)Association Request - reject"); 965 return WLAN_STATUS_INVALID_IE; 966 } 967 } else if (hapd->conf->wps_state && wpa_ie == NULL) { 968 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in " 969 "(Re)Association Request - possible WPS use"); 970 sta->flags |= WLAN_STA_MAYBE_WPS; 971 } else 972#endif /* CONFIG_WPS */ 973 if (hapd->conf->wpa && wpa_ie == NULL) { 974 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 975 HOSTAPD_LEVEL_INFO, 976 "No WPA/RSN IE in association request"); 977 return WLAN_STATUS_INVALID_IE; 978 } 979 980 if (hapd->conf->wpa && wpa_ie) { 981 int res; 982 wpa_ie -= 2; 983 wpa_ie_len += 2; 984 if (sta->wpa_sm == NULL) 985 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 986 sta->addr, 987 p2p_dev_addr); 988 if (sta->wpa_sm == NULL) { 989 wpa_printf(MSG_WARNING, "Failed to initialize WPA " 990 "state machine"); 991 return WLAN_STATUS_UNSPECIFIED_FAILURE; 992 } 993 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, 994 wpa_ie, wpa_ie_len, 995 elems.mdie, elems.mdie_len); 996 if (res == WPA_INVALID_GROUP) 997 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; 998 else if (res == WPA_INVALID_PAIRWISE) 999 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; 1000 else if (res == WPA_INVALID_AKMP) 1001 resp = WLAN_STATUS_AKMP_NOT_VALID; 1002 else if (res == WPA_ALLOC_FAIL) 1003 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 1004#ifdef CONFIG_IEEE80211W 1005 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) 1006 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 1007 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) 1008 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 1009#endif /* CONFIG_IEEE80211W */ 1010 else if (res == WPA_INVALID_MDIE) 1011 resp = WLAN_STATUS_INVALID_MDIE; 1012 else if (res != WPA_IE_OK) 1013 resp = WLAN_STATUS_INVALID_IE; 1014 if (resp != WLAN_STATUS_SUCCESS) 1015 return resp; 1016#ifdef CONFIG_IEEE80211W 1017 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1018 sta->sa_query_count > 0) 1019 ap_check_sa_query_timeout(hapd, sta); 1020 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1021 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) { 1022 /* 1023 * STA has already been associated with MFP and SA 1024 * Query timeout has not been reached. Reject the 1025 * association attempt temporarily and start SA Query, 1026 * if one is not pending. 1027 */ 1028 1029 if (sta->sa_query_count == 0) 1030 ap_sta_start_sa_query(hapd, sta); 1031 1032 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; 1033 } 1034 1035 if (wpa_auth_uses_mfp(sta->wpa_sm)) 1036 sta->flags |= WLAN_STA_MFP; 1037 else 1038 sta->flags &= ~WLAN_STA_MFP; 1039#endif /* CONFIG_IEEE80211W */ 1040 1041#ifdef CONFIG_IEEE80211R 1042 if (sta->auth_alg == WLAN_AUTH_FT) { 1043 if (!reassoc) { 1044 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried " 1045 "to use association (not " 1046 "re-association) with FT auth_alg", 1047 MAC2STR(sta->addr)); 1048 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1049 } 1050 1051 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies, 1052 ies_len); 1053 if (resp != WLAN_STATUS_SUCCESS) 1054 return resp; 1055 } 1056#endif /* CONFIG_IEEE80211R */ 1057 1058#ifdef CONFIG_SAE 1059 if (wpa_auth_uses_sae(sta->wpa_sm) && 1060 sta->auth_alg != WLAN_AUTH_SAE && 1061 !(sta->auth_alg == WLAN_AUTH_FT && 1062 wpa_auth_uses_ft_sae(sta->wpa_sm))) { 1063 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use " 1064 "SAE AKM after non-SAE auth_alg %u", 1065 MAC2STR(sta->addr), sta->auth_alg); 1066 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 1067 } 1068#endif /* CONFIG_SAE */ 1069 1070#ifdef CONFIG_IEEE80211N 1071 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) && 1072 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) { 1073 hostapd_logger(hapd, sta->addr, 1074 HOSTAPD_MODULE_IEEE80211, 1075 HOSTAPD_LEVEL_INFO, 1076 "Station tried to use TKIP with HT " 1077 "association"); 1078 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; 1079 } 1080#endif /* CONFIG_IEEE80211N */ 1081 } else 1082 wpa_auth_sta_no_wpa(sta->wpa_sm); 1083 1084#ifdef CONFIG_P2P 1085 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len); 1086#endif /* CONFIG_P2P */ 1087 1088#ifdef CONFIG_HS20 1089 wpabuf_free(sta->hs20_ie); 1090 if (elems.hs20 && elems.hs20_len > 4) { 1091 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4, 1092 elems.hs20_len - 4); 1093 } else 1094 sta->hs20_ie = NULL; 1095#endif /* CONFIG_HS20 */ 1096 1097 return WLAN_STATUS_SUCCESS; 1098} 1099 1100 1101static void send_deauth(struct hostapd_data *hapd, const u8 *addr, 1102 u16 reason_code) 1103{ 1104 int send_len; 1105 struct ieee80211_mgmt reply; 1106 1107 os_memset(&reply, 0, sizeof(reply)); 1108 reply.frame_control = 1109 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); 1110 os_memcpy(reply.da, addr, ETH_ALEN); 1111 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN); 1112 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN); 1113 1114 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth); 1115 reply.u.deauth.reason_code = host_to_le16(reason_code); 1116 1117 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0) 1118 wpa_printf(MSG_INFO, "Failed to send deauth: %s", 1119 strerror(errno)); 1120} 1121 1122 1123static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta, 1124 u16 status_code, int reassoc, const u8 *ies, 1125 size_t ies_len) 1126{ 1127 int send_len; 1128 u8 buf[sizeof(struct ieee80211_mgmt) + 1024]; 1129 struct ieee80211_mgmt *reply; 1130 u8 *p; 1131 1132 os_memset(buf, 0, sizeof(buf)); 1133 reply = (struct ieee80211_mgmt *) buf; 1134 reply->frame_control = 1135 IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1136 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP : 1137 WLAN_FC_STYPE_ASSOC_RESP)); 1138 os_memcpy(reply->da, sta->addr, ETH_ALEN); 1139 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 1140 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN); 1141 1142 send_len = IEEE80211_HDRLEN; 1143 send_len += sizeof(reply->u.assoc_resp); 1144 reply->u.assoc_resp.capab_info = 1145 host_to_le16(hostapd_own_capab_info(hapd, sta, 0)); 1146 reply->u.assoc_resp.status_code = host_to_le16(status_code); 1147 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) 1148 | BIT(14) | BIT(15)); 1149 /* Supported rates */ 1150 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable); 1151 /* Extended supported rates */ 1152 p = hostapd_eid_ext_supp_rates(hapd, p); 1153 1154#ifdef CONFIG_IEEE80211R 1155 if (status_code == WLAN_STATUS_SUCCESS) { 1156 /* IEEE 802.11r: Mobility Domain Information, Fast BSS 1157 * Transition Information, RSN, [RIC Response] */ 1158 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p, 1159 buf + sizeof(buf) - p, 1160 sta->auth_alg, ies, ies_len); 1161 } 1162#endif /* CONFIG_IEEE80211R */ 1163 1164#ifdef CONFIG_IEEE80211W 1165 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) 1166 p = hostapd_eid_assoc_comeback_time(hapd, sta, p); 1167#endif /* CONFIG_IEEE80211W */ 1168 1169#ifdef CONFIG_IEEE80211N 1170 p = hostapd_eid_ht_capabilities(hapd, p); 1171 p = hostapd_eid_ht_operation(hapd, p); 1172#endif /* CONFIG_IEEE80211N */ 1173 1174#ifdef CONFIG_IEEE80211AC 1175 p = hostapd_eid_vht_capabilities(hapd, p); 1176 p = hostapd_eid_vht_operation(hapd, p); 1177#endif /* CONFIG_IEEE80211AC */ 1178 1179 p = hostapd_eid_ext_capab(hapd, p); 1180 p = hostapd_eid_bss_max_idle_period(hapd, p); 1181 if (sta->qos_map_enabled) 1182 p = hostapd_eid_qos_map_set(hapd, p); 1183 1184 if (sta->flags & WLAN_STA_WMM) 1185 p = hostapd_eid_wmm(hapd, p); 1186 1187#ifdef CONFIG_WPS 1188 if ((sta->flags & WLAN_STA_WPS) || 1189 ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) { 1190 struct wpabuf *wps = wps_build_assoc_resp_ie(); 1191 if (wps) { 1192 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps)); 1193 p += wpabuf_len(wps); 1194 wpabuf_free(wps); 1195 } 1196 } 1197#endif /* CONFIG_WPS */ 1198 1199#ifdef CONFIG_P2P 1200 if (sta->p2p_ie) { 1201 struct wpabuf *p2p_resp_ie; 1202 enum p2p_status_code status; 1203 switch (status_code) { 1204 case WLAN_STATUS_SUCCESS: 1205 status = P2P_SC_SUCCESS; 1206 break; 1207 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA: 1208 status = P2P_SC_FAIL_LIMIT_REACHED; 1209 break; 1210 default: 1211 status = P2P_SC_FAIL_INVALID_PARAMS; 1212 break; 1213 } 1214 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status); 1215 if (p2p_resp_ie) { 1216 os_memcpy(p, wpabuf_head(p2p_resp_ie), 1217 wpabuf_len(p2p_resp_ie)); 1218 p += wpabuf_len(p2p_resp_ie); 1219 wpabuf_free(p2p_resp_ie); 1220 } 1221 } 1222#endif /* CONFIG_P2P */ 1223 1224#ifdef CONFIG_P2P_MANAGER 1225 if (hapd->conf->p2p & P2P_MANAGE) 1226 p = hostapd_eid_p2p_manage(hapd, p); 1227#endif /* CONFIG_P2P_MANAGER */ 1228 1229 send_len += p - reply->u.assoc_resp.variable; 1230 1231 if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0) 1232 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s", 1233 strerror(errno)); 1234} 1235 1236 1237static void handle_assoc(struct hostapd_data *hapd, 1238 const struct ieee80211_mgmt *mgmt, size_t len, 1239 int reassoc) 1240{ 1241 u16 capab_info, listen_interval; 1242 u16 resp = WLAN_STATUS_SUCCESS; 1243 const u8 *pos; 1244 int left, i; 1245 struct sta_info *sta; 1246 1247 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) : 1248 sizeof(mgmt->u.assoc_req))) { 1249 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)", 1250 reassoc, (unsigned long) len); 1251 return; 1252 } 1253 1254#ifdef CONFIG_TESTING_OPTIONS 1255 if (reassoc) { 1256 if (hapd->iconf->ignore_reassoc_probability > 0.0d && 1257 drand48() < hapd->iconf->ignore_reassoc_probability) { 1258 wpa_printf(MSG_INFO, 1259 "TESTING: ignoring reassoc request from " 1260 MACSTR, MAC2STR(mgmt->sa)); 1261 return; 1262 } 1263 } else { 1264 if (hapd->iconf->ignore_assoc_probability > 0.0d && 1265 drand48() < hapd->iconf->ignore_assoc_probability) { 1266 wpa_printf(MSG_INFO, 1267 "TESTING: ignoring assoc request from " 1268 MACSTR, MAC2STR(mgmt->sa)); 1269 return; 1270 } 1271 } 1272#endif /* CONFIG_TESTING_OPTIONS */ 1273 1274 if (reassoc) { 1275 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info); 1276 listen_interval = le_to_host16( 1277 mgmt->u.reassoc_req.listen_interval); 1278 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR 1279 " capab_info=0x%02x listen_interval=%d current_ap=" 1280 MACSTR, 1281 MAC2STR(mgmt->sa), capab_info, listen_interval, 1282 MAC2STR(mgmt->u.reassoc_req.current_ap)); 1283 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req)); 1284 pos = mgmt->u.reassoc_req.variable; 1285 } else { 1286 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info); 1287 listen_interval = le_to_host16( 1288 mgmt->u.assoc_req.listen_interval); 1289 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR 1290 " capab_info=0x%02x listen_interval=%d", 1291 MAC2STR(mgmt->sa), capab_info, listen_interval); 1292 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req)); 1293 pos = mgmt->u.assoc_req.variable; 1294 } 1295 1296 sta = ap_get_sta(hapd, mgmt->sa); 1297#ifdef CONFIG_IEEE80211R 1298 if (sta && sta->auth_alg == WLAN_AUTH_FT && 1299 (sta->flags & WLAN_STA_AUTH) == 0) { 1300 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate " 1301 "prior to authentication since it is using " 1302 "over-the-DS FT", MAC2STR(mgmt->sa)); 1303 } else 1304#endif /* CONFIG_IEEE80211R */ 1305 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) { 1306 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1307 HOSTAPD_LEVEL_INFO, "Station tried to " 1308 "associate before authentication " 1309 "(aid=%d flags=0x%x)", 1310 sta ? sta->aid : -1, 1311 sta ? sta->flags : 0); 1312 send_deauth(hapd, mgmt->sa, 1313 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA); 1314 return; 1315 } 1316 1317 if (hapd->tkip_countermeasures) { 1318 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 1319 goto fail; 1320 } 1321 1322 if (listen_interval > hapd->conf->max_listen_interval) { 1323 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1324 HOSTAPD_LEVEL_DEBUG, 1325 "Too large Listen Interval (%d)", 1326 listen_interval); 1327 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE; 1328 goto fail; 1329 } 1330 1331 /* followed by SSID and Supported rates; and HT capabilities if 802.11n 1332 * is used */ 1333 resp = check_assoc_ies(hapd, sta, pos, left, reassoc); 1334 if (resp != WLAN_STATUS_SUCCESS) 1335 goto fail; 1336 1337 if (hostapd_get_aid(hapd, sta) < 0) { 1338 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1339 HOSTAPD_LEVEL_INFO, "No room for more AIDs"); 1340 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 1341 goto fail; 1342 } 1343 1344 sta->capability = capab_info; 1345 sta->listen_interval = listen_interval; 1346 1347 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) 1348 sta->flags |= WLAN_STA_NONERP; 1349 for (i = 0; i < sta->supported_rates_len; i++) { 1350 if ((sta->supported_rates[i] & 0x7f) > 22) { 1351 sta->flags &= ~WLAN_STA_NONERP; 1352 break; 1353 } 1354 } 1355 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) { 1356 sta->nonerp_set = 1; 1357 hapd->iface->num_sta_non_erp++; 1358 if (hapd->iface->num_sta_non_erp == 1) 1359 ieee802_11_set_beacons(hapd->iface); 1360 } 1361 1362 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) && 1363 !sta->no_short_slot_time_set) { 1364 sta->no_short_slot_time_set = 1; 1365 hapd->iface->num_sta_no_short_slot_time++; 1366 if (hapd->iface->current_mode->mode == 1367 HOSTAPD_MODE_IEEE80211G && 1368 hapd->iface->num_sta_no_short_slot_time == 1) 1369 ieee802_11_set_beacons(hapd->iface); 1370 } 1371 1372 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) 1373 sta->flags |= WLAN_STA_SHORT_PREAMBLE; 1374 else 1375 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; 1376 1377 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && 1378 !sta->no_short_preamble_set) { 1379 sta->no_short_preamble_set = 1; 1380 hapd->iface->num_sta_no_short_preamble++; 1381 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G 1382 && hapd->iface->num_sta_no_short_preamble == 1) 1383 ieee802_11_set_beacons(hapd->iface); 1384 } 1385 1386#ifdef CONFIG_IEEE80211N 1387 update_ht_state(hapd, sta); 1388#endif /* CONFIG_IEEE80211N */ 1389 1390 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1391 HOSTAPD_LEVEL_DEBUG, 1392 "association OK (aid %d)", sta->aid); 1393 /* Station will be marked associated, after it acknowledges AssocResp 1394 */ 1395 sta->flags |= WLAN_STA_ASSOC_REQ_OK; 1396 1397#ifdef CONFIG_IEEE80211W 1398 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) { 1399 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out " 1400 "SA Query procedure", reassoc ? "re" : ""); 1401 /* TODO: Send a protected Disassociate frame to the STA using 1402 * the old key and Reason Code "Previous Authentication no 1403 * longer valid". Make sure this is only sent protected since 1404 * unprotected frame would be received by the STA that is now 1405 * trying to associate. 1406 */ 1407 } 1408#endif /* CONFIG_IEEE80211W */ 1409 1410 if (reassoc) { 1411 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap, 1412 ETH_ALEN); 1413 } 1414 1415 if (sta->last_assoc_req) 1416 os_free(sta->last_assoc_req); 1417 sta->last_assoc_req = os_malloc(len); 1418 if (sta->last_assoc_req) 1419 os_memcpy(sta->last_assoc_req, mgmt, len); 1420 1421 /* Make sure that the previously registered inactivity timer will not 1422 * remove the STA immediately. */ 1423 sta->timeout_next = STA_NULLFUNC; 1424 1425 fail: 1426 send_assoc_resp(hapd, sta, resp, reassoc, pos, left); 1427} 1428 1429 1430static void handle_disassoc(struct hostapd_data *hapd, 1431 const struct ieee80211_mgmt *mgmt, size_t len) 1432{ 1433 struct sta_info *sta; 1434 1435 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) { 1436 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)", 1437 (unsigned long) len); 1438 return; 1439 } 1440 1441 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d", 1442 MAC2STR(mgmt->sa), 1443 le_to_host16(mgmt->u.disassoc.reason_code)); 1444 1445 sta = ap_get_sta(hapd, mgmt->sa); 1446 if (sta == NULL) { 1447 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated", 1448 MAC2STR(mgmt->sa)); 1449 return; 1450 } 1451 1452 ap_sta_set_authorized(hapd, sta, 0); 1453 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK); 1454 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC); 1455 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1456 HOSTAPD_LEVEL_INFO, "disassociated"); 1457 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1458 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 1459 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA 1460 * authenticated. */ 1461 accounting_sta_stop(hapd, sta); 1462 ieee802_1x_free_station(sta); 1463 hostapd_drv_sta_remove(hapd, sta->addr); 1464 1465 if (sta->timeout_next == STA_NULLFUNC || 1466 sta->timeout_next == STA_DISASSOC) { 1467 sta->timeout_next = STA_DEAUTH; 1468 eloop_cancel_timeout(ap_handle_timer, hapd, sta); 1469 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer, 1470 hapd, sta); 1471 } 1472 1473 mlme_disassociate_indication( 1474 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code)); 1475} 1476 1477 1478static void handle_deauth(struct hostapd_data *hapd, 1479 const struct ieee80211_mgmt *mgmt, size_t len) 1480{ 1481 struct sta_info *sta; 1482 1483 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) { 1484 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short " 1485 "payload (len=%lu)", (unsigned long) len); 1486 return; 1487 } 1488 1489 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR 1490 " reason_code=%d", 1491 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code)); 1492 1493 sta = ap_get_sta(hapd, mgmt->sa); 1494 if (sta == NULL) { 1495 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying " 1496 "to deauthenticate, but it is not authenticated", 1497 MAC2STR(mgmt->sa)); 1498 return; 1499 } 1500 1501 ap_sta_set_authorized(hapd, sta, 0); 1502 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | 1503 WLAN_STA_ASSOC_REQ_OK); 1504 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH); 1505 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1506 HOSTAPD_LEVEL_DEBUG, "deauthenticated"); 1507 mlme_deauthenticate_indication( 1508 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code)); 1509 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1510 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 1511 ap_free_sta(hapd, sta); 1512} 1513 1514 1515static void handle_beacon(struct hostapd_data *hapd, 1516 const struct ieee80211_mgmt *mgmt, size_t len, 1517 struct hostapd_frame_info *fi) 1518{ 1519 struct ieee802_11_elems elems; 1520 1521 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) { 1522 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)", 1523 (unsigned long) len); 1524 return; 1525 } 1526 1527 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable, 1528 len - (IEEE80211_HDRLEN + 1529 sizeof(mgmt->u.beacon)), &elems, 1530 0); 1531 1532 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi); 1533} 1534 1535 1536#ifdef CONFIG_IEEE80211W 1537 1538static int hostapd_sa_query_action(struct hostapd_data *hapd, 1539 const struct ieee80211_mgmt *mgmt, 1540 size_t len) 1541{ 1542 const u8 *end; 1543 1544 end = mgmt->u.action.u.sa_query_resp.trans_id + 1545 WLAN_SA_QUERY_TR_ID_LEN; 1546 if (((u8 *) mgmt) + len < end) { 1547 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action " 1548 "frame (len=%lu)", (unsigned long) len); 1549 return 0; 1550 } 1551 1552 ieee802_11_sa_query_action(hapd, mgmt->sa, 1553 mgmt->u.action.u.sa_query_resp.action, 1554 mgmt->u.action.u.sa_query_resp.trans_id); 1555 return 1; 1556} 1557 1558 1559static int robust_action_frame(u8 category) 1560{ 1561 return category != WLAN_ACTION_PUBLIC && 1562 category != WLAN_ACTION_HT; 1563} 1564#endif /* CONFIG_IEEE80211W */ 1565 1566 1567static int handle_action(struct hostapd_data *hapd, 1568 const struct ieee80211_mgmt *mgmt, size_t len) 1569{ 1570 struct sta_info *sta; 1571 sta = ap_get_sta(hapd, mgmt->sa); 1572 1573 if (len < IEEE80211_HDRLEN + 1) { 1574 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1575 HOSTAPD_LEVEL_DEBUG, 1576 "handle_action - too short payload (len=%lu)", 1577 (unsigned long) len); 1578 return 0; 1579 } 1580 1581 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC && 1582 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) { 1583 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action " 1584 "frame (category=%u) from unassociated STA " MACSTR, 1585 MAC2STR(mgmt->sa), mgmt->u.action.category); 1586 return 0; 1587 } 1588 1589#ifdef CONFIG_IEEE80211W 1590 if (sta && (sta->flags & WLAN_STA_MFP) && 1591 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP) && 1592 robust_action_frame(mgmt->u.action.category))) { 1593 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1594 HOSTAPD_LEVEL_DEBUG, 1595 "Dropped unprotected Robust Action frame from " 1596 "an MFP STA"); 1597 return 0; 1598 } 1599#endif /* CONFIG_IEEE80211W */ 1600 1601 switch (mgmt->u.action.category) { 1602#ifdef CONFIG_IEEE80211R 1603 case WLAN_ACTION_FT: 1604 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action, 1605 len - IEEE80211_HDRLEN)) 1606 break; 1607 return 1; 1608#endif /* CONFIG_IEEE80211R */ 1609 case WLAN_ACTION_WMM: 1610 hostapd_wmm_action(hapd, mgmt, len); 1611 return 1; 1612#ifdef CONFIG_IEEE80211W 1613 case WLAN_ACTION_SA_QUERY: 1614 return hostapd_sa_query_action(hapd, mgmt, len); 1615#endif /* CONFIG_IEEE80211W */ 1616#ifdef CONFIG_WNM 1617 case WLAN_ACTION_WNM: 1618 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len); 1619 return 1; 1620#endif /* CONFIG_WNM */ 1621 case WLAN_ACTION_PUBLIC: 1622 if (hapd->public_action_cb) { 1623 hapd->public_action_cb(hapd->public_action_cb_ctx, 1624 (u8 *) mgmt, len, 1625 hapd->iface->freq); 1626 } 1627 if (hapd->public_action_cb2) { 1628 hapd->public_action_cb2(hapd->public_action_cb2_ctx, 1629 (u8 *) mgmt, len, 1630 hapd->iface->freq); 1631 } 1632 if (hapd->public_action_cb || hapd->public_action_cb2) 1633 return 1; 1634 break; 1635 case WLAN_ACTION_VENDOR_SPECIFIC: 1636 if (hapd->vendor_action_cb) { 1637 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx, 1638 (u8 *) mgmt, len, 1639 hapd->iface->freq) == 0) 1640 return 1; 1641 } 1642 break; 1643 } 1644 1645 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1646 HOSTAPD_LEVEL_DEBUG, 1647 "handle_action - unknown action category %d or invalid " 1648 "frame", 1649 mgmt->u.action.category); 1650 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) && 1651 !(mgmt->sa[0] & 0x01)) { 1652 struct ieee80211_mgmt *resp; 1653 1654 /* 1655 * IEEE 802.11-REVma/D9.0 - 7.3.1.11 1656 * Return the Action frame to the source without change 1657 * except that MSB of the Category set to 1. 1658 */ 1659 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action " 1660 "frame back to sender"); 1661 resp = os_malloc(len); 1662 if (resp == NULL) 1663 return 0; 1664 os_memcpy(resp, mgmt, len); 1665 os_memcpy(resp->da, resp->sa, ETH_ALEN); 1666 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); 1667 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); 1668 resp->u.action.category |= 0x80; 1669 1670 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) { 1671 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send " 1672 "Action frame"); 1673 } 1674 os_free(resp); 1675 } 1676 1677 return 1; 1678} 1679 1680 1681/** 1682 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames 1683 * @hapd: hostapd BSS data structure (the BSS to which the management frame was 1684 * sent to) 1685 * @buf: management frame data (starting from IEEE 802.11 header) 1686 * @len: length of frame data in octets 1687 * @fi: meta data about received frame (signal level, etc.) 1688 * 1689 * Process all incoming IEEE 802.11 management frames. This will be called for 1690 * each frame received from the kernel driver through wlan#ap interface. In 1691 * addition, it can be called to re-inserted pending frames (e.g., when using 1692 * external RADIUS server as an MAC ACL). 1693 */ 1694int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len, 1695 struct hostapd_frame_info *fi) 1696{ 1697 struct ieee80211_mgmt *mgmt; 1698 int broadcast; 1699 u16 fc, stype; 1700 int ret = 0; 1701 1702#ifdef CONFIG_TESTING_OPTIONS 1703 if (hapd->ext_mgmt_frame_handling) { 1704 size_t hex_len = 2 * len + 1; 1705 char *hex = os_malloc(hex_len); 1706 if (hex) { 1707 wpa_snprintf_hex(hex, hex_len, buf, len); 1708 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-RX %s", hex); 1709 os_free(hex); 1710 } 1711 return 1; 1712 } 1713#endif /* CONFIG_TESTING_OPTIONS */ 1714 1715 if (len < 24) 1716 return 0; 1717 1718 mgmt = (struct ieee80211_mgmt *) buf; 1719 fc = le_to_host16(mgmt->frame_control); 1720 stype = WLAN_FC_GET_STYPE(fc); 1721 1722 if (stype == WLAN_FC_STYPE_BEACON) { 1723 handle_beacon(hapd, mgmt, len, fi); 1724 return 1; 1725 } 1726 1727 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff && 1728 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff && 1729 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff; 1730 1731 if (!broadcast && 1732#ifdef CONFIG_P2P 1733 /* Invitation responses can be sent with the peer MAC as BSSID */ 1734 !((hapd->conf->p2p & P2P_GROUP_OWNER) && 1735 stype == WLAN_FC_STYPE_ACTION) && 1736#endif /* CONFIG_P2P */ 1737 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) { 1738 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address", 1739 MAC2STR(mgmt->bssid)); 1740 return 0; 1741 } 1742 1743 1744 if (stype == WLAN_FC_STYPE_PROBE_REQ) { 1745 handle_probe_req(hapd, mgmt, len, fi->ssi_signal); 1746 return 1; 1747 } 1748 1749 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) { 1750 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1751 HOSTAPD_LEVEL_DEBUG, 1752 "MGMT: DA=" MACSTR " not our address", 1753 MAC2STR(mgmt->da)); 1754 return 0; 1755 } 1756 1757 switch (stype) { 1758 case WLAN_FC_STYPE_AUTH: 1759 wpa_printf(MSG_DEBUG, "mgmt::auth"); 1760 handle_auth(hapd, mgmt, len); 1761 ret = 1; 1762 break; 1763 case WLAN_FC_STYPE_ASSOC_REQ: 1764 wpa_printf(MSG_DEBUG, "mgmt::assoc_req"); 1765 handle_assoc(hapd, mgmt, len, 0); 1766 ret = 1; 1767 break; 1768 case WLAN_FC_STYPE_REASSOC_REQ: 1769 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req"); 1770 handle_assoc(hapd, mgmt, len, 1); 1771 ret = 1; 1772 break; 1773 case WLAN_FC_STYPE_DISASSOC: 1774 wpa_printf(MSG_DEBUG, "mgmt::disassoc"); 1775 handle_disassoc(hapd, mgmt, len); 1776 ret = 1; 1777 break; 1778 case WLAN_FC_STYPE_DEAUTH: 1779 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth"); 1780 handle_deauth(hapd, mgmt, len); 1781 ret = 1; 1782 break; 1783 case WLAN_FC_STYPE_ACTION: 1784 wpa_printf(MSG_DEBUG, "mgmt::action"); 1785 ret = handle_action(hapd, mgmt, len); 1786 break; 1787 default: 1788 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1789 HOSTAPD_LEVEL_DEBUG, 1790 "unknown mgmt frame subtype %d", stype); 1791 break; 1792 } 1793 1794 return ret; 1795} 1796 1797 1798static void handle_auth_cb(struct hostapd_data *hapd, 1799 const struct ieee80211_mgmt *mgmt, 1800 size_t len, int ok) 1801{ 1802 u16 auth_alg, auth_transaction, status_code; 1803 struct sta_info *sta; 1804 1805 if (!ok) { 1806 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1807 HOSTAPD_LEVEL_NOTICE, 1808 "did not acknowledge authentication response"); 1809 return; 1810 } 1811 1812 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 1813 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)", 1814 (unsigned long) len); 1815 return; 1816 } 1817 1818 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 1819 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 1820 status_code = le_to_host16(mgmt->u.auth.status_code); 1821 1822 sta = ap_get_sta(hapd, mgmt->da); 1823 if (!sta) { 1824 wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found", 1825 MAC2STR(mgmt->da)); 1826 return; 1827 } 1828 1829 if (status_code == WLAN_STATUS_SUCCESS && 1830 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || 1831 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { 1832 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1833 HOSTAPD_LEVEL_INFO, "authenticated"); 1834 sta->flags |= WLAN_STA_AUTH; 1835 } 1836} 1837 1838 1839static void hostapd_set_wds_encryption(struct hostapd_data *hapd, 1840 struct sta_info *sta, 1841 char *ifname_wds) 1842{ 1843 int i; 1844 struct hostapd_ssid *ssid = sta->ssid; 1845 1846 if (hapd->conf->ieee802_1x || hapd->conf->wpa) 1847 return; 1848 1849 for (i = 0; i < 4; i++) { 1850 if (ssid->wep.key[i] && 1851 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i, 1852 i == ssid->wep.idx, NULL, 0, 1853 ssid->wep.key[i], ssid->wep.len[i])) { 1854 wpa_printf(MSG_WARNING, 1855 "Could not set WEP keys for WDS interface; %s", 1856 ifname_wds); 1857 break; 1858 } 1859 } 1860} 1861 1862 1863static void handle_assoc_cb(struct hostapd_data *hapd, 1864 const struct ieee80211_mgmt *mgmt, 1865 size_t len, int reassoc, int ok) 1866{ 1867 u16 status; 1868 struct sta_info *sta; 1869 int new_assoc = 1; 1870 struct ieee80211_ht_capabilities ht_cap; 1871 struct ieee80211_vht_capabilities vht_cap; 1872 1873 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) : 1874 sizeof(mgmt->u.assoc_resp))) { 1875 wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)", 1876 reassoc, (unsigned long) len); 1877 return; 1878 } 1879 1880 sta = ap_get_sta(hapd, mgmt->da); 1881 if (!sta) { 1882 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found", 1883 MAC2STR(mgmt->da)); 1884 return; 1885 } 1886 1887 if (!ok) { 1888 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1889 HOSTAPD_LEVEL_DEBUG, 1890 "did not acknowledge association response"); 1891 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK; 1892 return; 1893 } 1894 1895 if (reassoc) 1896 status = le_to_host16(mgmt->u.reassoc_resp.status_code); 1897 else 1898 status = le_to_host16(mgmt->u.assoc_resp.status_code); 1899 1900 if (status != WLAN_STATUS_SUCCESS) 1901 goto fail; 1902 1903 /* Stop previous accounting session, if one is started, and allocate 1904 * new session id for the new session. */ 1905 accounting_sta_stop(hapd, sta); 1906 1907 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1908 HOSTAPD_LEVEL_INFO, 1909 "associated (aid %d)", 1910 sta->aid); 1911 1912 if (sta->flags & WLAN_STA_ASSOC) 1913 new_assoc = 0; 1914 sta->flags |= WLAN_STA_ASSOC; 1915 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE; 1916 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) || 1917 sta->auth_alg == WLAN_AUTH_FT) { 1918 /* 1919 * Open, static WEP, or FT protocol; no separate authorization 1920 * step. 1921 */ 1922 ap_sta_set_authorized(hapd, sta, 1); 1923 } 1924 1925 if (reassoc) 1926 mlme_reassociate_indication(hapd, sta); 1927 else 1928 mlme_associate_indication(hapd, sta); 1929 1930#ifdef CONFIG_IEEE80211W 1931 sta->sa_query_timed_out = 0; 1932#endif /* CONFIG_IEEE80211W */ 1933 1934 /* 1935 * Remove the STA entry in order to make sure the STA PS state gets 1936 * cleared and configuration gets updated in case of reassociation back 1937 * to the same AP. 1938 */ 1939 hostapd_drv_sta_remove(hapd, sta->addr); 1940 1941#ifdef CONFIG_IEEE80211N 1942 if (sta->flags & WLAN_STA_HT) 1943 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap); 1944#endif /* CONFIG_IEEE80211N */ 1945#ifdef CONFIG_IEEE80211AC 1946 if (sta->flags & WLAN_STA_VHT) 1947 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap); 1948#endif /* CONFIG_IEEE80211AC */ 1949 1950 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability, 1951 sta->supported_rates, sta->supported_rates_len, 1952 sta->listen_interval, 1953 sta->flags & WLAN_STA_HT ? &ht_cap : NULL, 1954 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL, 1955 sta->flags, sta->qosinfo)) { 1956 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1957 HOSTAPD_LEVEL_NOTICE, 1958 "Could not add STA to kernel driver"); 1959 1960 ap_sta_disconnect(hapd, sta, sta->addr, 1961 WLAN_REASON_DISASSOC_AP_BUSY); 1962 1963 goto fail; 1964 } 1965 1966 if (sta->flags & WLAN_STA_WDS) { 1967 int ret; 1968 char ifname_wds[IFNAMSIZ + 1]; 1969 1970 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr, 1971 sta->aid, 1); 1972 if (!ret) 1973 hostapd_set_wds_encryption(hapd, sta, ifname_wds); 1974 } 1975 1976 if (sta->eapol_sm == NULL) { 1977 /* 1978 * This STA does not use RADIUS server for EAP authentication, 1979 * so bind it to the selected VLAN interface now, since the 1980 * interface selection is not going to change anymore. 1981 */ 1982 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1983 goto fail; 1984 } else if (sta->vlan_id) { 1985 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */ 1986 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1987 goto fail; 1988 } 1989 1990 hostapd_set_sta_flags(hapd, sta); 1991 1992 if (sta->auth_alg == WLAN_AUTH_FT) 1993 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); 1994 else 1995 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); 1996 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc); 1997 1998 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); 1999 2000 fail: 2001 /* Copy of the association request is not needed anymore */ 2002 if (sta->last_assoc_req) { 2003 os_free(sta->last_assoc_req); 2004 sta->last_assoc_req = NULL; 2005 } 2006} 2007 2008 2009static void handle_deauth_cb(struct hostapd_data *hapd, 2010 const struct ieee80211_mgmt *mgmt, 2011 size_t len, int ok) 2012{ 2013 struct sta_info *sta; 2014 if (mgmt->da[0] & 0x01) 2015 return; 2016 sta = ap_get_sta(hapd, mgmt->da); 2017 if (!sta) { 2018 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR 2019 " not found", MAC2STR(mgmt->da)); 2020 return; 2021 } 2022 if (ok) 2023 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth", 2024 MAC2STR(sta->addr)); 2025 else 2026 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2027 "deauth", MAC2STR(sta->addr)); 2028 2029 ap_sta_deauth_cb(hapd, sta); 2030} 2031 2032 2033static void handle_disassoc_cb(struct hostapd_data *hapd, 2034 const struct ieee80211_mgmt *mgmt, 2035 size_t len, int ok) 2036{ 2037 struct sta_info *sta; 2038 if (mgmt->da[0] & 0x01) 2039 return; 2040 sta = ap_get_sta(hapd, mgmt->da); 2041 if (!sta) { 2042 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR 2043 " not found", MAC2STR(mgmt->da)); 2044 return; 2045 } 2046 if (ok) 2047 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc", 2048 MAC2STR(sta->addr)); 2049 else 2050 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2051 "disassoc", MAC2STR(sta->addr)); 2052 2053 ap_sta_disassoc_cb(hapd, sta); 2054} 2055 2056 2057/** 2058 * ieee802_11_mgmt_cb - Process management frame TX status callback 2059 * @hapd: hostapd BSS data structure (the BSS from which the management frame 2060 * was sent from) 2061 * @buf: management frame data (starting from IEEE 802.11 header) 2062 * @len: length of frame data in octets 2063 * @stype: management frame subtype from frame control field 2064 * @ok: Whether the frame was ACK'ed 2065 */ 2066void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len, 2067 u16 stype, int ok) 2068{ 2069 const struct ieee80211_mgmt *mgmt; 2070 mgmt = (const struct ieee80211_mgmt *) buf; 2071 2072#ifdef CONFIG_TESTING_OPTIONS 2073 if (hapd->ext_mgmt_frame_handling) { 2074 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d", 2075 stype, ok); 2076 return; 2077 } 2078#endif /* CONFIG_TESTING_OPTIONS */ 2079 2080 switch (stype) { 2081 case WLAN_FC_STYPE_AUTH: 2082 wpa_printf(MSG_DEBUG, "mgmt::auth cb"); 2083 handle_auth_cb(hapd, mgmt, len, ok); 2084 break; 2085 case WLAN_FC_STYPE_ASSOC_RESP: 2086 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb"); 2087 handle_assoc_cb(hapd, mgmt, len, 0, ok); 2088 break; 2089 case WLAN_FC_STYPE_REASSOC_RESP: 2090 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb"); 2091 handle_assoc_cb(hapd, mgmt, len, 1, ok); 2092 break; 2093 case WLAN_FC_STYPE_PROBE_RESP: 2094 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb"); 2095 break; 2096 case WLAN_FC_STYPE_DEAUTH: 2097 wpa_printf(MSG_DEBUG, "mgmt::deauth cb"); 2098 handle_deauth_cb(hapd, mgmt, len, ok); 2099 break; 2100 case WLAN_FC_STYPE_DISASSOC: 2101 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb"); 2102 handle_disassoc_cb(hapd, mgmt, len, ok); 2103 break; 2104 case WLAN_FC_STYPE_ACTION: 2105 wpa_printf(MSG_DEBUG, "mgmt::action cb"); 2106 break; 2107 default: 2108 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype); 2109 break; 2110 } 2111} 2112 2113 2114int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 2115{ 2116 /* TODO */ 2117 return 0; 2118} 2119 2120 2121int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 2122 char *buf, size_t buflen) 2123{ 2124 /* TODO */ 2125 return 0; 2126} 2127 2128 2129void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr, 2130 const u8 *buf, size_t len, int ack) 2131{ 2132 struct sta_info *sta; 2133 struct hostapd_iface *iface = hapd->iface; 2134 2135 sta = ap_get_sta(hapd, addr); 2136 if (sta == NULL && iface->num_bss > 1) { 2137 size_t j; 2138 for (j = 0; j < iface->num_bss; j++) { 2139 hapd = iface->bss[j]; 2140 sta = ap_get_sta(hapd, addr); 2141 if (sta) 2142 break; 2143 } 2144 } 2145 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) 2146 return; 2147 if (sta->flags & WLAN_STA_PENDING_POLL) { 2148 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending " 2149 "activity poll", MAC2STR(sta->addr), 2150 ack ? "ACKed" : "did not ACK"); 2151 if (ack) 2152 sta->flags &= ~WLAN_STA_PENDING_POLL; 2153 } 2154 2155 ieee802_1x_tx_status(hapd, sta, buf, len, ack); 2156} 2157 2158 2159void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst, 2160 const u8 *data, size_t len, int ack) 2161{ 2162 struct sta_info *sta; 2163 struct hostapd_iface *iface = hapd->iface; 2164 2165 sta = ap_get_sta(hapd, dst); 2166 if (sta == NULL && iface->num_bss > 1) { 2167 size_t j; 2168 for (j = 0; j < iface->num_bss; j++) { 2169 hapd = iface->bss[j]; 2170 sta = ap_get_sta(hapd, dst); 2171 if (sta) 2172 break; 2173 } 2174 } 2175 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 2176 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA " 2177 MACSTR " that is not currently associated", 2178 MAC2STR(dst)); 2179 return; 2180 } 2181 2182 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack); 2183} 2184 2185 2186void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr) 2187{ 2188 struct sta_info *sta; 2189 struct hostapd_iface *iface = hapd->iface; 2190 2191 sta = ap_get_sta(hapd, addr); 2192 if (sta == NULL && iface->num_bss > 1) { 2193 size_t j; 2194 for (j = 0; j < iface->num_bss; j++) { 2195 hapd = iface->bss[j]; 2196 sta = ap_get_sta(hapd, addr); 2197 if (sta) 2198 break; 2199 } 2200 } 2201 if (sta == NULL) 2202 return; 2203 if (!(sta->flags & WLAN_STA_PENDING_POLL)) 2204 return; 2205 2206 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending " 2207 "activity poll", MAC2STR(sta->addr)); 2208 sta->flags &= ~WLAN_STA_PENDING_POLL; 2209} 2210 2211 2212void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src, 2213 int wds) 2214{ 2215 struct sta_info *sta; 2216 2217 sta = ap_get_sta(hapd, src); 2218 if (sta && (sta->flags & WLAN_STA_ASSOC)) { 2219 if (!hapd->conf->wds_sta) 2220 return; 2221 2222 if (wds && !(sta->flags & WLAN_STA_WDS)) { 2223 int ret; 2224 char ifname_wds[IFNAMSIZ + 1]; 2225 2226 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for " 2227 "STA " MACSTR " (aid %u)", 2228 MAC2STR(sta->addr), sta->aid); 2229 sta->flags |= WLAN_STA_WDS; 2230 ret = hostapd_set_wds_sta(hapd, ifname_wds, 2231 sta->addr, sta->aid, 1); 2232 if (!ret) 2233 hostapd_set_wds_encryption(hapd, sta, 2234 ifname_wds); 2235 } 2236 return; 2237 } 2238 2239 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA " 2240 MACSTR, MAC2STR(src)); 2241 if (src[0] & 0x01) { 2242 /* Broadcast bit set in SA?! Ignore the frame silently. */ 2243 return; 2244 } 2245 2246 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) { 2247 wpa_printf(MSG_DEBUG, "Association Response to the STA has " 2248 "already been sent, but no TX status yet known - " 2249 "ignore Class 3 frame issue with " MACSTR, 2250 MAC2STR(src)); 2251 return; 2252 } 2253 2254 if (sta && (sta->flags & WLAN_STA_AUTH)) 2255 hostapd_drv_sta_disassoc( 2256 hapd, src, 2257 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2258 else 2259 hostapd_drv_sta_deauth( 2260 hapd, src, 2261 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2262} 2263 2264 2265#endif /* CONFIG_NATIVE_WINDOWS */ 2266