ieee802_11.c revision 391c59f0632df8db1c325da1d31d479b2eedce45
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 "drivers/driver.h" 19#include "common/ieee802_11_defs.h" 20#include "common/ieee802_11_common.h" 21#include "common/wpa_ctrl.h" 22#include "common/sae.h" 23#include "radius/radius.h" 24#include "radius/radius_client.h" 25#include "p2p/p2p.h" 26#include "wps/wps.h" 27#include "hostapd.h" 28#include "beacon.h" 29#include "ieee802_11_auth.h" 30#include "sta_info.h" 31#include "ieee802_1x.h" 32#include "wpa_auth.h" 33#include "wmm.h" 34#include "ap_list.h" 35#include "accounting.h" 36#include "ap_config.h" 37#include "ap_mlme.h" 38#include "p2p_hostapd.h" 39#include "ap_drv_ops.h" 40#include "wnm_ap.h" 41#include "ieee802_11.h" 42 43 44u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid) 45{ 46 u8 *pos = eid; 47 int i, num, count; 48 49 if (hapd->iface->current_rates == NULL) 50 return eid; 51 52 *pos++ = WLAN_EID_SUPP_RATES; 53 num = hapd->iface->num_rates; 54 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) 55 num++; 56 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) 57 num++; 58 if (num > 8) { 59 /* rest of the rates are encoded in Extended supported 60 * rates element */ 61 num = 8; 62 } 63 64 *pos++ = num; 65 count = 0; 66 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num; 67 i++) { 68 count++; 69 *pos = hapd->iface->current_rates[i].rate / 5; 70 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) 71 *pos |= 0x80; 72 pos++; 73 } 74 75 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) { 76 count++; 77 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; 78 } 79 80 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) { 81 count++; 82 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY; 83 } 84 85 return pos; 86} 87 88 89u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid) 90{ 91 u8 *pos = eid; 92 int i, num, count; 93 94 if (hapd->iface->current_rates == NULL) 95 return eid; 96 97 num = hapd->iface->num_rates; 98 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) 99 num++; 100 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) 101 num++; 102 if (num <= 8) 103 return eid; 104 num -= 8; 105 106 *pos++ = WLAN_EID_EXT_SUPP_RATES; 107 *pos++ = num; 108 count = 0; 109 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8; 110 i++) { 111 count++; 112 if (count <= 8) 113 continue; /* already in SuppRates IE */ 114 *pos = hapd->iface->current_rates[i].rate / 5; 115 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) 116 *pos |= 0x80; 117 pos++; 118 } 119 120 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) { 121 count++; 122 if (count > 8) 123 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; 124 } 125 126 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) { 127 count++; 128 if (count > 8) 129 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY; 130 } 131 132 return pos; 133} 134 135 136u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta, 137 int probe) 138{ 139 int capab = WLAN_CAPABILITY_ESS; 140 int privacy; 141 142 if (hapd->iface->num_sta_no_short_preamble == 0 && 143 hapd->iconf->preamble == SHORT_PREAMBLE) 144 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 145 146 privacy = hapd->conf->ssid.wep.keys_set; 147 148 if (hapd->conf->ieee802_1x && 149 (hapd->conf->default_wep_key_len || 150 hapd->conf->individual_wep_key_len)) 151 privacy = 1; 152 153 if (hapd->conf->wpa) 154 privacy = 1; 155 156 if (sta) { 157 int policy, def_klen; 158 if (probe && sta->ssid_probe) { 159 policy = sta->ssid_probe->security_policy; 160 def_klen = sta->ssid_probe->wep.default_len; 161 } else { 162 policy = sta->ssid->security_policy; 163 def_klen = sta->ssid->wep.default_len; 164 } 165 privacy = policy != SECURITY_PLAINTEXT; 166 if (policy == SECURITY_IEEE_802_1X && def_klen == 0) 167 privacy = 0; 168 } 169 170 if (privacy) 171 capab |= WLAN_CAPABILITY_PRIVACY; 172 173 if (hapd->iface->current_mode && 174 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && 175 hapd->iface->num_sta_no_short_slot_time == 0) 176 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 177 178 return capab; 179} 180 181 182void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len) 183{ 184 int i; 185 if (len > HOSTAPD_MAX_SSID_LEN) 186 len = HOSTAPD_MAX_SSID_LEN; 187 for (i = 0; i < len; i++) { 188 if (ssid[i] >= 32 && ssid[i] < 127) 189 buf[i] = ssid[i]; 190 else 191 buf[i] = '.'; 192 } 193 buf[len] = '\0'; 194} 195 196 197static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta, 198 u16 auth_transaction, const u8 *challenge, 199 int iswep) 200{ 201 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 202 HOSTAPD_LEVEL_DEBUG, 203 "authentication (shared key, transaction %d)", 204 auth_transaction); 205 206 if (auth_transaction == 1) { 207 if (!sta->challenge) { 208 /* Generate a pseudo-random challenge */ 209 u8 key[8]; 210 struct os_time now; 211 int r; 212 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN); 213 if (sta->challenge == NULL) 214 return WLAN_STATUS_UNSPECIFIED_FAILURE; 215 216 os_get_time(&now); 217 r = os_random(); 218 os_memcpy(key, &now.sec, 4); 219 os_memcpy(key + 4, &r, 4); 220 rc4_skip(key, sizeof(key), 0, 221 sta->challenge, WLAN_AUTH_CHALLENGE_LEN); 222 } 223 return 0; 224 } 225 226 if (auth_transaction != 3) 227 return WLAN_STATUS_UNSPECIFIED_FAILURE; 228 229 /* Transaction 3 */ 230 if (!iswep || !sta->challenge || !challenge || 231 os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) { 232 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 233 HOSTAPD_LEVEL_INFO, 234 "shared key authentication - invalid " 235 "challenge-response"); 236 return WLAN_STATUS_CHALLENGE_FAIL; 237 } 238 239 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 240 HOSTAPD_LEVEL_DEBUG, 241 "authentication OK (shared key)"); 242#ifdef IEEE80211_REQUIRE_AUTH_ACK 243 /* Station will be marked authenticated if it ACKs the 244 * authentication reply. */ 245#else 246 sta->flags |= WLAN_STA_AUTH; 247 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 248#endif 249 os_free(sta->challenge); 250 sta->challenge = NULL; 251 252 return 0; 253} 254 255 256static void send_auth_reply(struct hostapd_data *hapd, 257 const u8 *dst, const u8 *bssid, 258 u16 auth_alg, u16 auth_transaction, u16 resp, 259 const u8 *ies, size_t ies_len) 260{ 261 struct ieee80211_mgmt *reply; 262 u8 *buf; 263 size_t rlen; 264 265 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len; 266 buf = os_zalloc(rlen); 267 if (buf == NULL) 268 return; 269 270 reply = (struct ieee80211_mgmt *) buf; 271 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 272 WLAN_FC_STYPE_AUTH); 273 os_memcpy(reply->da, dst, ETH_ALEN); 274 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 275 os_memcpy(reply->bssid, bssid, ETH_ALEN); 276 277 reply->u.auth.auth_alg = host_to_le16(auth_alg); 278 reply->u.auth.auth_transaction = host_to_le16(auth_transaction); 279 reply->u.auth.status_code = host_to_le16(resp); 280 281 if (ies && ies_len) 282 os_memcpy(reply->u.auth.variable, ies, ies_len); 283 284 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR 285 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)", 286 MAC2STR(dst), auth_alg, auth_transaction, 287 resp, (unsigned long) ies_len); 288 if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0) 289 perror("send_auth_reply: send"); 290 291 os_free(buf); 292} 293 294 295#ifdef CONFIG_IEEE80211R 296static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid, 297 u16 auth_transaction, u16 status, 298 const u8 *ies, size_t ies_len) 299{ 300 struct hostapd_data *hapd = ctx; 301 struct sta_info *sta; 302 303 send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction, 304 status, ies, ies_len); 305 306 if (status != WLAN_STATUS_SUCCESS) 307 return; 308 309 sta = ap_get_sta(hapd, dst); 310 if (sta == NULL) 311 return; 312 313 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211, 314 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)"); 315 sta->flags |= WLAN_STA_AUTH; 316 mlme_authenticate_indication(hapd, sta); 317} 318#endif /* CONFIG_IEEE80211R */ 319 320 321#ifdef CONFIG_SAE 322 323static struct wpabuf * auth_process_sae_commit(struct hostapd_data *hapd, 324 struct sta_info *sta) 325{ 326 struct wpabuf *buf; 327 328 if (hapd->conf->ssid.wpa_passphrase == NULL) { 329 wpa_printf(MSG_DEBUG, "SAE: No password available"); 330 return NULL; 331 } 332 333 if (sae_prepare_commit(hapd->own_addr, sta->addr, 334 (u8 *) hapd->conf->ssid.wpa_passphrase, 335 os_strlen(hapd->conf->ssid.wpa_passphrase), 336 sta->sae) < 0) { 337 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); 338 return NULL; 339 } 340 341 if (sae_process_commit(sta->sae) < 0) { 342 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer commit"); 343 return NULL; 344 } 345 346 buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN); 347 if (buf == NULL) 348 return NULL; 349 sae_write_commit(sta->sae, buf, NULL); 350 351 return buf; 352} 353 354 355static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd, 356 struct sta_info *sta) 357{ 358 struct wpabuf *buf; 359 360 buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN); 361 if (buf == NULL) 362 return NULL; 363 364 sae_write_confirm(sta->sae, buf); 365 366 return buf; 367} 368 369 370static int use_sae_anti_clogging(struct hostapd_data *hapd) 371{ 372 struct sta_info *sta; 373 unsigned int open = 0; 374 375 if (hapd->conf->sae_anti_clogging_threshold == 0) 376 return 1; 377 378 for (sta = hapd->sta_list; sta; sta = sta->next) { 379 if (!sta->sae) 380 continue; 381 if (sta->sae->state != SAE_COMMITTED && 382 sta->sae->state != SAE_CONFIRMED) 383 continue; 384 open++; 385 if (open >= hapd->conf->sae_anti_clogging_threshold) 386 return 1; 387 } 388 389 return 0; 390} 391 392 393static int check_sae_token(struct hostapd_data *hapd, const u8 *addr, 394 const u8 *token, size_t token_len) 395{ 396 u8 mac[SHA256_MAC_LEN]; 397 398 if (token_len != SHA256_MAC_LEN) 399 return -1; 400 if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), 401 addr, ETH_ALEN, mac) < 0 || 402 os_memcmp(token, mac, SHA256_MAC_LEN) != 0) 403 return -1; 404 405 return 0; 406} 407 408 409static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd, 410 const u8 *addr) 411{ 412 struct wpabuf *buf; 413 u8 *token; 414 struct os_time t; 415 416 os_get_time(&t); 417 if (hapd->last_sae_token_key_update == 0 || 418 t.sec > hapd->last_sae_token_key_update + 60) { 419 if (random_get_bytes(hapd->sae_token_key, 420 sizeof(hapd->sae_token_key)) < 0) 421 return NULL; 422 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key", 423 hapd->sae_token_key, sizeof(hapd->sae_token_key)); 424 hapd->last_sae_token_key_update = t.sec; 425 } 426 427 buf = wpabuf_alloc(SHA256_MAC_LEN); 428 if (buf == NULL) 429 return NULL; 430 431 token = wpabuf_put(buf, SHA256_MAC_LEN); 432 hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), 433 addr, ETH_ALEN, token); 434 435 return buf; 436} 437 438 439static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta, 440 const struct ieee80211_mgmt *mgmt, size_t len, 441 u8 auth_transaction) 442{ 443 u16 resp = WLAN_STATUS_SUCCESS; 444 struct wpabuf *data = NULL; 445 446 if (!sta->sae) { 447 if (auth_transaction != 1) 448 return; 449 sta->sae = os_zalloc(sizeof(*sta->sae)); 450 if (sta->sae == NULL) 451 return; 452 sta->sae->state = SAE_NOTHING; 453 } 454 455 if (auth_transaction == 1) { 456 const u8 *token = NULL; 457 size_t token_len = 0; 458 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 459 HOSTAPD_LEVEL_DEBUG, 460 "start SAE authentication (RX commit)"); 461 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable, 462 ((const u8 *) mgmt) + len - 463 mgmt->u.auth.variable, &token, 464 &token_len, hapd->conf->sae_groups); 465 if (token && check_sae_token(hapd, sta->addr, token, token_len) 466 < 0) { 467 wpa_printf(MSG_DEBUG, "SAE: Drop commit message with " 468 "incorrect token from " MACSTR, 469 MAC2STR(sta->addr)); 470 return; 471 } 472 473 if (resp == WLAN_STATUS_SUCCESS) { 474 if (!token && use_sae_anti_clogging(hapd)) { 475 wpa_printf(MSG_DEBUG, "SAE: Request anti-" 476 "clogging token from " MACSTR, 477 MAC2STR(sta->addr)); 478 data = auth_build_token_req(hapd, sta->addr); 479 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ; 480 } else { 481 data = auth_process_sae_commit(hapd, sta); 482 if (data == NULL) 483 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 484 else 485 sta->sae->state = SAE_COMMITTED; 486 } 487 } 488 } else if (auth_transaction == 2) { 489 if (sta->sae->state != SAE_COMMITTED) { 490 hostapd_logger(hapd, sta->addr, 491 HOSTAPD_MODULE_IEEE80211, 492 HOSTAPD_LEVEL_DEBUG, 493 "SAE confirm before commit"); 494 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 495 } 496 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 497 HOSTAPD_LEVEL_DEBUG, 498 "SAE authentication (RX confirm)"); 499 if (sae_check_confirm(sta->sae, mgmt->u.auth.variable, 500 ((u8 *) mgmt) + len - 501 mgmt->u.auth.variable) < 0) { 502 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 503 } else { 504 resp = WLAN_STATUS_SUCCESS; 505 sta->flags |= WLAN_STA_AUTH; 506 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 507 sta->auth_alg = WLAN_AUTH_SAE; 508 mlme_authenticate_indication(hapd, sta); 509 510 data = auth_build_sae_confirm(hapd, sta); 511 if (data == NULL) 512 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 513 else { 514 sta->sae->state = SAE_ACCEPTED; 515 sae_clear_temp_data(sta->sae); 516 } 517 } 518 } else { 519 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 520 HOSTAPD_LEVEL_DEBUG, 521 "unexpected SAE authentication transaction %u", 522 auth_transaction); 523 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 524 } 525 526 sta->auth_alg = WLAN_AUTH_SAE; 527 528 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE, 529 auth_transaction, resp, 530 data ? wpabuf_head(data) : (u8 *) "", 531 data ? wpabuf_len(data) : 0); 532 wpabuf_free(data); 533} 534#endif /* CONFIG_SAE */ 535 536 537static void handle_auth(struct hostapd_data *hapd, 538 const struct ieee80211_mgmt *mgmt, size_t len) 539{ 540 u16 auth_alg, auth_transaction, status_code; 541 u16 resp = WLAN_STATUS_SUCCESS; 542 struct sta_info *sta = NULL; 543 int res; 544 u16 fc; 545 const u8 *challenge = NULL; 546 u32 session_timeout, acct_interim_interval; 547 int vlan_id = 0; 548 struct hostapd_sta_wpa_psk_short *psk = NULL; 549 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; 550 size_t resp_ies_len = 0; 551 char *identity = NULL; 552 char *radius_cui = NULL; 553 554 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 555 printf("handle_auth - too short payload (len=%lu)\n", 556 (unsigned long) len); 557 return; 558 } 559 560#ifdef CONFIG_TESTING_OPTIONS 561 if (hapd->iconf->ignore_auth_probability > 0.0d && 562 drand48() < hapd->iconf->ignore_auth_probability) { 563 wpa_printf(MSG_INFO, 564 "TESTING: ignoring auth frame from " MACSTR, 565 MAC2STR(mgmt->sa)); 566 return; 567 } 568#endif /* CONFIG_TESTING_OPTIONS */ 569 570 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 571 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 572 status_code = le_to_host16(mgmt->u.auth.status_code); 573 fc = le_to_host16(mgmt->frame_control); 574 575 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 576 2 + WLAN_AUTH_CHALLENGE_LEN && 577 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE && 578 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN) 579 challenge = &mgmt->u.auth.variable[2]; 580 581 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d " 582 "auth_transaction=%d status_code=%d wep=%d%s", 583 MAC2STR(mgmt->sa), auth_alg, auth_transaction, 584 status_code, !!(fc & WLAN_FC_ISWEP), 585 challenge ? " challenge" : ""); 586 587 if (hapd->tkip_countermeasures) { 588 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 589 goto fail; 590 } 591 592 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) && 593 auth_alg == WLAN_AUTH_OPEN) || 594#ifdef CONFIG_IEEE80211R 595 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && 596 auth_alg == WLAN_AUTH_FT) || 597#endif /* CONFIG_IEEE80211R */ 598#ifdef CONFIG_SAE 599 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) && 600 auth_alg == WLAN_AUTH_SAE) || 601#endif /* CONFIG_SAE */ 602 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) && 603 auth_alg == WLAN_AUTH_SHARED_KEY))) { 604 printf("Unsupported authentication algorithm (%d)\n", 605 auth_alg); 606 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 607 goto fail; 608 } 609 610 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE || 611 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) { 612 printf("Unknown authentication transaction number (%d)\n", 613 auth_transaction); 614 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 615 goto fail; 616 } 617 618 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { 619 printf("Station " MACSTR " not allowed to authenticate.\n", 620 MAC2STR(mgmt->sa)); 621 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 622 goto fail; 623 } 624 625 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len, 626 &session_timeout, 627 &acct_interim_interval, &vlan_id, 628 &psk, &identity, &radius_cui); 629 630 if (res == HOSTAPD_ACL_REJECT) { 631 printf("Station " MACSTR " not allowed to authenticate.\n", 632 MAC2STR(mgmt->sa)); 633 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 634 goto fail; 635 } 636 if (res == HOSTAPD_ACL_PENDING) { 637 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR 638 " waiting for an external authentication", 639 MAC2STR(mgmt->sa)); 640 /* Authentication code will re-send the authentication frame 641 * after it has received (and cached) information from the 642 * external source. */ 643 return; 644 } 645 646 sta = ap_sta_add(hapd, mgmt->sa); 647 if (!sta) { 648 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 649 goto fail; 650 } 651 652 if (vlan_id > 0) { 653 if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) { 654 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 655 HOSTAPD_LEVEL_INFO, "Invalid VLAN ID " 656 "%d received from RADIUS server", 657 vlan_id); 658 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 659 goto fail; 660 } 661 sta->vlan_id = vlan_id; 662 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 663 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); 664 } 665 666 hostapd_free_psk_list(sta->psk); 667 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) { 668 sta->psk = psk; 669 psk = NULL; 670 } else { 671 sta->psk = NULL; 672 } 673 674 sta->identity = identity; 675 identity = NULL; 676 sta->radius_cui = radius_cui; 677 radius_cui = NULL; 678 679 sta->flags &= ~WLAN_STA_PREAUTH; 680 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); 681 682 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval) 683 sta->acct_interim_interval = acct_interim_interval; 684 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) 685 ap_sta_session_timeout(hapd, sta, session_timeout); 686 else 687 ap_sta_no_session_timeout(hapd, sta); 688 689 switch (auth_alg) { 690 case WLAN_AUTH_OPEN: 691 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 692 HOSTAPD_LEVEL_DEBUG, 693 "authentication OK (open system)"); 694#ifdef IEEE80211_REQUIRE_AUTH_ACK 695 /* Station will be marked authenticated if it ACKs the 696 * authentication reply. */ 697#else 698 sta->flags |= WLAN_STA_AUTH; 699 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 700 sta->auth_alg = WLAN_AUTH_OPEN; 701 mlme_authenticate_indication(hapd, sta); 702#endif 703 break; 704 case WLAN_AUTH_SHARED_KEY: 705 resp = auth_shared_key(hapd, sta, auth_transaction, challenge, 706 fc & WLAN_FC_ISWEP); 707 sta->auth_alg = WLAN_AUTH_SHARED_KEY; 708 mlme_authenticate_indication(hapd, sta); 709 if (sta->challenge && auth_transaction == 1) { 710 resp_ies[0] = WLAN_EID_CHALLENGE; 711 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN; 712 os_memcpy(resp_ies + 2, sta->challenge, 713 WLAN_AUTH_CHALLENGE_LEN); 714 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN; 715 } 716 break; 717#ifdef CONFIG_IEEE80211R 718 case WLAN_AUTH_FT: 719 sta->auth_alg = WLAN_AUTH_FT; 720 if (sta->wpa_sm == NULL) 721 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 722 sta->addr, NULL); 723 if (sta->wpa_sm == NULL) { 724 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " 725 "state machine"); 726 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 727 goto fail; 728 } 729 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid, 730 auth_transaction, mgmt->u.auth.variable, 731 len - IEEE80211_HDRLEN - 732 sizeof(mgmt->u.auth), 733 handle_auth_ft_finish, hapd); 734 /* handle_auth_ft_finish() callback will complete auth. */ 735 return; 736#endif /* CONFIG_IEEE80211R */ 737#ifdef CONFIG_SAE 738 case WLAN_AUTH_SAE: 739 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction); 740 return; 741#endif /* CONFIG_SAE */ 742 } 743 744 fail: 745 os_free(identity); 746 os_free(radius_cui); 747 hostapd_free_psk_list(psk); 748 749 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg, 750 auth_transaction + 1, resp, resp_ies, resp_ies_len); 751} 752 753 754static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta) 755{ 756 int i, j = 32, aid; 757 758 /* get a unique AID */ 759 if (sta->aid > 0) { 760 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid); 761 return 0; 762 } 763 764 for (i = 0; i < AID_WORDS; i++) { 765 if (hapd->sta_aid[i] == (u32) -1) 766 continue; 767 for (j = 0; j < 32; j++) { 768 if (!(hapd->sta_aid[i] & BIT(j))) 769 break; 770 } 771 if (j < 32) 772 break; 773 } 774 if (j == 32) 775 return -1; 776 aid = i * 32 + j + 1; 777 if (aid > 2007) 778 return -1; 779 780 sta->aid = aid; 781 hapd->sta_aid[i] |= BIT(j); 782 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid); 783 return 0; 784} 785 786 787static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta, 788 const u8 *ssid_ie, size_t ssid_ie_len) 789{ 790 if (ssid_ie == NULL) 791 return WLAN_STATUS_UNSPECIFIED_FAILURE; 792 793 if (ssid_ie_len != hapd->conf->ssid.ssid_len || 794 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) { 795 char ssid_txt[33]; 796 ieee802_11_print_ssid(ssid_txt, ssid_ie, ssid_ie_len); 797 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 798 HOSTAPD_LEVEL_INFO, 799 "Station tried to associate with unknown SSID " 800 "'%s'", ssid_txt); 801 return WLAN_STATUS_UNSPECIFIED_FAILURE; 802 } 803 804 return WLAN_STATUS_SUCCESS; 805} 806 807 808static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta, 809 const u8 *wmm_ie, size_t wmm_ie_len) 810{ 811 sta->flags &= ~WLAN_STA_WMM; 812 sta->qosinfo = 0; 813 if (wmm_ie && hapd->conf->wmm_enabled) { 814 struct wmm_information_element *wmm; 815 816 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) { 817 hostapd_logger(hapd, sta->addr, 818 HOSTAPD_MODULE_WPA, 819 HOSTAPD_LEVEL_DEBUG, 820 "invalid WMM element in association " 821 "request"); 822 return WLAN_STATUS_UNSPECIFIED_FAILURE; 823 } 824 825 sta->flags |= WLAN_STA_WMM; 826 wmm = (struct wmm_information_element *) wmm_ie; 827 sta->qosinfo = wmm->qos_info; 828 } 829 return WLAN_STATUS_SUCCESS; 830} 831 832 833static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta, 834 struct ieee802_11_elems *elems) 835{ 836 if (!elems->supp_rates) { 837 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 838 HOSTAPD_LEVEL_DEBUG, 839 "No supported rates element in AssocReq"); 840 return WLAN_STATUS_UNSPECIFIED_FAILURE; 841 } 842 843 if (elems->supp_rates_len + elems->ext_supp_rates_len > 844 sizeof(sta->supported_rates)) { 845 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 846 HOSTAPD_LEVEL_DEBUG, 847 "Invalid supported rates element length %d+%d", 848 elems->supp_rates_len, 849 elems->ext_supp_rates_len); 850 return WLAN_STATUS_UNSPECIFIED_FAILURE; 851 } 852 853 sta->supported_rates_len = merge_byte_arrays( 854 sta->supported_rates, sizeof(sta->supported_rates), 855 elems->supp_rates, elems->supp_rates_len, 856 elems->ext_supp_rates, elems->ext_supp_rates_len); 857 858 return WLAN_STATUS_SUCCESS; 859} 860 861 862static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, 863 const u8 *ies, size_t ies_len, int reassoc) 864{ 865 struct ieee802_11_elems elems; 866 u16 resp; 867 const u8 *wpa_ie; 868 size_t wpa_ie_len; 869 const u8 *p2p_dev_addr = NULL; 870 871 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { 872 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 873 HOSTAPD_LEVEL_INFO, "Station sent an invalid " 874 "association request"); 875 return WLAN_STATUS_UNSPECIFIED_FAILURE; 876 } 877 878 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len); 879 if (resp != WLAN_STATUS_SUCCESS) 880 return resp; 881 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len); 882 if (resp != WLAN_STATUS_SUCCESS) 883 return resp; 884 resp = copy_supp_rates(hapd, sta, &elems); 885 if (resp != WLAN_STATUS_SUCCESS) 886 return resp; 887#ifdef CONFIG_IEEE80211N 888 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities, 889 elems.ht_capabilities_len); 890 if (resp != WLAN_STATUS_SUCCESS) 891 return resp; 892 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && 893 !(sta->flags & WLAN_STA_HT)) { 894 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 895 HOSTAPD_LEVEL_INFO, "Station does not support " 896 "mandatory HT PHY - reject association"); 897 return WLAN_STATUS_ASSOC_DENIED_NO_HT; 898 } 899#endif /* CONFIG_IEEE80211N */ 900 901#ifdef CONFIG_IEEE80211AC 902 resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities, 903 elems.vht_capabilities_len); 904 if (resp != WLAN_STATUS_SUCCESS) 905 return resp; 906 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && 907 !(sta->flags & WLAN_STA_VHT)) { 908 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 909 HOSTAPD_LEVEL_INFO, "Station does not support " 910 "mandatory VHT PHY - reject association"); 911 return WLAN_STATUS_UNSPECIFIED_FAILURE; 912 } 913#endif /* CONFIG_IEEE80211AC */ 914 915#ifdef CONFIG_P2P 916 if (elems.p2p) { 917 wpabuf_free(sta->p2p_ie); 918 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 919 P2P_IE_VENDOR_TYPE); 920 if (sta->p2p_ie) 921 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie); 922 } else { 923 wpabuf_free(sta->p2p_ie); 924 sta->p2p_ie = NULL; 925 } 926#endif /* CONFIG_P2P */ 927 928 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { 929 wpa_ie = elems.rsn_ie; 930 wpa_ie_len = elems.rsn_ie_len; 931 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) && 932 elems.wpa_ie) { 933 wpa_ie = elems.wpa_ie; 934 wpa_ie_len = elems.wpa_ie_len; 935 } else { 936 wpa_ie = NULL; 937 wpa_ie_len = 0; 938 } 939 940#ifdef CONFIG_WPS 941 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2); 942 if (hapd->conf->wps_state && elems.wps_ie) { 943 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association " 944 "Request - assume WPS is used"); 945 sta->flags |= WLAN_STA_WPS; 946 wpabuf_free(sta->wps_ie); 947 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 948 WPS_IE_VENDOR_TYPE); 949 if (sta->wps_ie && wps_is_20(sta->wps_ie)) { 950 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0"); 951 sta->flags |= WLAN_STA_WPS2; 952 } 953 wpa_ie = NULL; 954 wpa_ie_len = 0; 955 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) { 956 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in " 957 "(Re)Association Request - reject"); 958 return WLAN_STATUS_INVALID_IE; 959 } 960 } else if (hapd->conf->wps_state && wpa_ie == NULL) { 961 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in " 962 "(Re)Association Request - possible WPS use"); 963 sta->flags |= WLAN_STA_MAYBE_WPS; 964 } else 965#endif /* CONFIG_WPS */ 966 if (hapd->conf->wpa && wpa_ie == NULL) { 967 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 968 HOSTAPD_LEVEL_INFO, 969 "No WPA/RSN IE in association request"); 970 return WLAN_STATUS_INVALID_IE; 971 } 972 973 if (hapd->conf->wpa && wpa_ie) { 974 int res; 975 wpa_ie -= 2; 976 wpa_ie_len += 2; 977 if (sta->wpa_sm == NULL) 978 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 979 sta->addr, 980 p2p_dev_addr); 981 if (sta->wpa_sm == NULL) { 982 wpa_printf(MSG_WARNING, "Failed to initialize WPA " 983 "state machine"); 984 return WLAN_STATUS_UNSPECIFIED_FAILURE; 985 } 986 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, 987 wpa_ie, wpa_ie_len, 988 elems.mdie, elems.mdie_len); 989 if (res == WPA_INVALID_GROUP) 990 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; 991 else if (res == WPA_INVALID_PAIRWISE) 992 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; 993 else if (res == WPA_INVALID_AKMP) 994 resp = WLAN_STATUS_AKMP_NOT_VALID; 995 else if (res == WPA_ALLOC_FAIL) 996 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 997#ifdef CONFIG_IEEE80211W 998 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) 999 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 1000 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) 1001 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 1002#endif /* CONFIG_IEEE80211W */ 1003 else if (res == WPA_INVALID_MDIE) 1004 resp = WLAN_STATUS_INVALID_MDIE; 1005 else if (res != WPA_IE_OK) 1006 resp = WLAN_STATUS_INVALID_IE; 1007 if (resp != WLAN_STATUS_SUCCESS) 1008 return resp; 1009#ifdef CONFIG_IEEE80211W 1010 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1011 sta->sa_query_count > 0) 1012 ap_check_sa_query_timeout(hapd, sta); 1013 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1014 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) { 1015 /* 1016 * STA has already been associated with MFP and SA 1017 * Query timeout has not been reached. Reject the 1018 * association attempt temporarily and start SA Query, 1019 * if one is not pending. 1020 */ 1021 1022 if (sta->sa_query_count == 0) 1023 ap_sta_start_sa_query(hapd, sta); 1024 1025 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; 1026 } 1027 1028 if (wpa_auth_uses_mfp(sta->wpa_sm)) 1029 sta->flags |= WLAN_STA_MFP; 1030 else 1031 sta->flags &= ~WLAN_STA_MFP; 1032#endif /* CONFIG_IEEE80211W */ 1033 1034#ifdef CONFIG_IEEE80211R 1035 if (sta->auth_alg == WLAN_AUTH_FT) { 1036 if (!reassoc) { 1037 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried " 1038 "to use association (not " 1039 "re-association) with FT auth_alg", 1040 MAC2STR(sta->addr)); 1041 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1042 } 1043 1044 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies, 1045 ies_len); 1046 if (resp != WLAN_STATUS_SUCCESS) 1047 return resp; 1048 } 1049#endif /* CONFIG_IEEE80211R */ 1050 1051#ifdef CONFIG_SAE 1052 if (wpa_auth_uses_sae(sta->wpa_sm) && 1053 sta->auth_alg != WLAN_AUTH_SAE) { 1054 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use " 1055 "SAE AKM after non-SAE auth_alg %u", 1056 MAC2STR(sta->addr), sta->auth_alg); 1057 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 1058 } 1059#endif /* CONFIG_SAE */ 1060 1061#ifdef CONFIG_IEEE80211N 1062 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) && 1063 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) { 1064 hostapd_logger(hapd, sta->addr, 1065 HOSTAPD_MODULE_IEEE80211, 1066 HOSTAPD_LEVEL_INFO, 1067 "Station tried to use TKIP with HT " 1068 "association"); 1069 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; 1070 } 1071#endif /* CONFIG_IEEE80211N */ 1072 } else 1073 wpa_auth_sta_no_wpa(sta->wpa_sm); 1074 1075#ifdef CONFIG_P2P 1076 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len); 1077#endif /* CONFIG_P2P */ 1078 1079#ifdef CONFIG_HS20 1080 wpabuf_free(sta->hs20_ie); 1081 if (elems.hs20 && elems.hs20_len > 4) { 1082 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4, 1083 elems.hs20_len - 4); 1084 } else 1085 sta->hs20_ie = NULL; 1086#endif /* CONFIG_HS20 */ 1087 1088 return WLAN_STATUS_SUCCESS; 1089} 1090 1091 1092static void send_deauth(struct hostapd_data *hapd, const u8 *addr, 1093 u16 reason_code) 1094{ 1095 int send_len; 1096 struct ieee80211_mgmt reply; 1097 1098 os_memset(&reply, 0, sizeof(reply)); 1099 reply.frame_control = 1100 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); 1101 os_memcpy(reply.da, addr, ETH_ALEN); 1102 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN); 1103 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN); 1104 1105 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth); 1106 reply.u.deauth.reason_code = host_to_le16(reason_code); 1107 1108 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0) 1109 wpa_printf(MSG_INFO, "Failed to send deauth: %s", 1110 strerror(errno)); 1111} 1112 1113 1114static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta, 1115 u16 status_code, int reassoc, const u8 *ies, 1116 size_t ies_len) 1117{ 1118 int send_len; 1119 u8 buf[sizeof(struct ieee80211_mgmt) + 1024]; 1120 struct ieee80211_mgmt *reply; 1121 u8 *p; 1122 1123 os_memset(buf, 0, sizeof(buf)); 1124 reply = (struct ieee80211_mgmt *) buf; 1125 reply->frame_control = 1126 IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1127 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP : 1128 WLAN_FC_STYPE_ASSOC_RESP)); 1129 os_memcpy(reply->da, sta->addr, ETH_ALEN); 1130 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 1131 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN); 1132 1133 send_len = IEEE80211_HDRLEN; 1134 send_len += sizeof(reply->u.assoc_resp); 1135 reply->u.assoc_resp.capab_info = 1136 host_to_le16(hostapd_own_capab_info(hapd, sta, 0)); 1137 reply->u.assoc_resp.status_code = host_to_le16(status_code); 1138 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) 1139 | BIT(14) | BIT(15)); 1140 /* Supported rates */ 1141 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable); 1142 /* Extended supported rates */ 1143 p = hostapd_eid_ext_supp_rates(hapd, p); 1144 1145#ifdef CONFIG_IEEE80211R 1146 if (status_code == WLAN_STATUS_SUCCESS) { 1147 /* IEEE 802.11r: Mobility Domain Information, Fast BSS 1148 * Transition Information, RSN, [RIC Response] */ 1149 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p, 1150 buf + sizeof(buf) - p, 1151 sta->auth_alg, ies, ies_len); 1152 } 1153#endif /* CONFIG_IEEE80211R */ 1154 1155#ifdef CONFIG_IEEE80211W 1156 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) 1157 p = hostapd_eid_assoc_comeback_time(hapd, sta, p); 1158#endif /* CONFIG_IEEE80211W */ 1159 1160#ifdef CONFIG_IEEE80211N 1161 p = hostapd_eid_ht_capabilities(hapd, p); 1162 p = hostapd_eid_ht_operation(hapd, p); 1163#endif /* CONFIG_IEEE80211N */ 1164 1165#ifdef CONFIG_IEEE80211AC 1166 p = hostapd_eid_vht_capabilities(hapd, p); 1167 p = hostapd_eid_vht_operation(hapd, p); 1168#endif /* CONFIG_IEEE80211AC */ 1169 1170 p = hostapd_eid_ext_capab(hapd, p); 1171 p = hostapd_eid_bss_max_idle_period(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 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)" 1239 "\n", 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 printf("handle_disassoc - too short payload (len=%lu)\n", 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 printf("Station " MACSTR " trying to disassociate, but it " 1437 "is not associated.\n", 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 printf("handle_beacon - too short payload (len=%lu)\n", 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 void 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; 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} 1545 1546 1547static int robust_action_frame(u8 category) 1548{ 1549 return category != WLAN_ACTION_PUBLIC && 1550 category != WLAN_ACTION_HT; 1551} 1552#endif /* CONFIG_IEEE80211W */ 1553 1554 1555#ifdef CONFIG_WNM 1556static void hostapd_wnm_action(struct hostapd_data *hapd, struct sta_info *sta, 1557 const struct ieee80211_mgmt *mgmt, 1558 size_t len) 1559{ 1560 struct rx_action action; 1561 if (len < IEEE80211_HDRLEN + 2) 1562 return; 1563 os_memset(&action, 0, sizeof(action)); 1564 action.da = mgmt->da; 1565 action.sa = mgmt->sa; 1566 action.bssid = mgmt->bssid; 1567 action.category = mgmt->u.action.category; 1568 action.data = (const u8 *) &mgmt->u.action.u.wnm_sleep_req.action; 1569 action.len = len - IEEE80211_HDRLEN - 1; 1570 action.freq = hapd->iface->freq; 1571 ieee802_11_rx_wnm_action_ap(hapd, &action); 1572} 1573#endif /* CONFIG_WNM */ 1574 1575 1576static void handle_action(struct hostapd_data *hapd, 1577 const struct ieee80211_mgmt *mgmt, size_t len) 1578{ 1579 struct sta_info *sta; 1580 sta = ap_get_sta(hapd, mgmt->sa); 1581 1582 if (len < IEEE80211_HDRLEN + 1) { 1583 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1584 HOSTAPD_LEVEL_DEBUG, 1585 "handle_action - too short payload (len=%lu)", 1586 (unsigned long) len); 1587 return; 1588 } 1589 1590 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC && 1591 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) { 1592 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action " 1593 "frame (category=%u) from unassociated STA " MACSTR, 1594 MAC2STR(mgmt->sa), mgmt->u.action.category); 1595 return; 1596 } 1597 1598#ifdef CONFIG_IEEE80211W 1599 if (sta && (sta->flags & WLAN_STA_MFP) && 1600 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP) && 1601 robust_action_frame(mgmt->u.action.category))) { 1602 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1603 HOSTAPD_LEVEL_DEBUG, 1604 "Dropped unprotected Robust Action frame from " 1605 "an MFP STA"); 1606 return; 1607 } 1608#endif /* CONFIG_IEEE80211W */ 1609 1610 switch (mgmt->u.action.category) { 1611#ifdef CONFIG_IEEE80211R 1612 case WLAN_ACTION_FT: 1613 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action, 1614 len - IEEE80211_HDRLEN)) 1615 break; 1616 return; 1617#endif /* CONFIG_IEEE80211R */ 1618 case WLAN_ACTION_WMM: 1619 hostapd_wmm_action(hapd, mgmt, len); 1620 return; 1621#ifdef CONFIG_IEEE80211W 1622 case WLAN_ACTION_SA_QUERY: 1623 hostapd_sa_query_action(hapd, mgmt, len); 1624 return; 1625#endif /* CONFIG_IEEE80211W */ 1626#ifdef CONFIG_WNM 1627 case WLAN_ACTION_WNM: 1628 hostapd_wnm_action(hapd, sta, mgmt, len); 1629 return; 1630#endif /* CONFIG_WNM */ 1631 case WLAN_ACTION_PUBLIC: 1632 if (hapd->public_action_cb) { 1633 hapd->public_action_cb(hapd->public_action_cb_ctx, 1634 (u8 *) mgmt, len, 1635 hapd->iface->freq); 1636 } 1637 if (hapd->public_action_cb2) { 1638 hapd->public_action_cb2(hapd->public_action_cb2_ctx, 1639 (u8 *) mgmt, len, 1640 hapd->iface->freq); 1641 } 1642 if (hapd->public_action_cb || hapd->public_action_cb2) 1643 return; 1644 break; 1645 case WLAN_ACTION_VENDOR_SPECIFIC: 1646 if (hapd->vendor_action_cb) { 1647 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx, 1648 (u8 *) mgmt, len, 1649 hapd->iface->freq) == 0) 1650 return; 1651 } 1652 break; 1653 } 1654 1655 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1656 HOSTAPD_LEVEL_DEBUG, 1657 "handle_action - unknown action category %d or invalid " 1658 "frame", 1659 mgmt->u.action.category); 1660 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) && 1661 !(mgmt->sa[0] & 0x01)) { 1662 struct ieee80211_mgmt *resp; 1663 1664 /* 1665 * IEEE 802.11-REVma/D9.0 - 7.3.1.11 1666 * Return the Action frame to the source without change 1667 * except that MSB of the Category set to 1. 1668 */ 1669 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action " 1670 "frame back to sender"); 1671 resp = os_malloc(len); 1672 if (resp == NULL) 1673 return; 1674 os_memcpy(resp, mgmt, len); 1675 os_memcpy(resp->da, resp->sa, ETH_ALEN); 1676 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); 1677 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); 1678 resp->u.action.category |= 0x80; 1679 1680 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) { 1681 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send " 1682 "Action frame"); 1683 } 1684 os_free(resp); 1685 } 1686} 1687 1688 1689/** 1690 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames 1691 * @hapd: hostapd BSS data structure (the BSS to which the management frame was 1692 * sent to) 1693 * @buf: management frame data (starting from IEEE 802.11 header) 1694 * @len: length of frame data in octets 1695 * @fi: meta data about received frame (signal level, etc.) 1696 * 1697 * Process all incoming IEEE 802.11 management frames. This will be called for 1698 * each frame received from the kernel driver through wlan#ap interface. In 1699 * addition, it can be called to re-inserted pending frames (e.g., when using 1700 * external RADIUS server as an MAC ACL). 1701 */ 1702void ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len, 1703 struct hostapd_frame_info *fi) 1704{ 1705 struct ieee80211_mgmt *mgmt; 1706 int broadcast; 1707 u16 fc, stype; 1708 1709 if (len < 24) 1710 return; 1711 1712 mgmt = (struct ieee80211_mgmt *) buf; 1713 fc = le_to_host16(mgmt->frame_control); 1714 stype = WLAN_FC_GET_STYPE(fc); 1715 1716 if (stype == WLAN_FC_STYPE_BEACON) { 1717 handle_beacon(hapd, mgmt, len, fi); 1718 return; 1719 } 1720 1721 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff && 1722 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff && 1723 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff; 1724 1725 if (!broadcast && 1726#ifdef CONFIG_P2P 1727 /* Invitation responses can be sent with the peer MAC as BSSID */ 1728 !((hapd->conf->p2p & P2P_GROUP_OWNER) && 1729 stype == WLAN_FC_STYPE_ACTION) && 1730#endif /* CONFIG_P2P */ 1731 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) { 1732 printf("MGMT: BSSID=" MACSTR " not our address\n", 1733 MAC2STR(mgmt->bssid)); 1734 return; 1735 } 1736 1737 1738 if (stype == WLAN_FC_STYPE_PROBE_REQ) { 1739 handle_probe_req(hapd, mgmt, len, fi->ssi_signal); 1740 return; 1741 } 1742 1743 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) { 1744 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1745 HOSTAPD_LEVEL_DEBUG, 1746 "MGMT: DA=" MACSTR " not our address", 1747 MAC2STR(mgmt->da)); 1748 return; 1749 } 1750 1751 switch (stype) { 1752 case WLAN_FC_STYPE_AUTH: 1753 wpa_printf(MSG_DEBUG, "mgmt::auth"); 1754 handle_auth(hapd, mgmt, len); 1755 break; 1756 case WLAN_FC_STYPE_ASSOC_REQ: 1757 wpa_printf(MSG_DEBUG, "mgmt::assoc_req"); 1758 handle_assoc(hapd, mgmt, len, 0); 1759 break; 1760 case WLAN_FC_STYPE_REASSOC_REQ: 1761 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req"); 1762 handle_assoc(hapd, mgmt, len, 1); 1763 break; 1764 case WLAN_FC_STYPE_DISASSOC: 1765 wpa_printf(MSG_DEBUG, "mgmt::disassoc"); 1766 handle_disassoc(hapd, mgmt, len); 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 break; 1772 case WLAN_FC_STYPE_ACTION: 1773 wpa_printf(MSG_DEBUG, "mgmt::action"); 1774 handle_action(hapd, mgmt, len); 1775 break; 1776 default: 1777 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1778 HOSTAPD_LEVEL_DEBUG, 1779 "unknown mgmt frame subtype %d", stype); 1780 break; 1781 } 1782} 1783 1784 1785static void handle_auth_cb(struct hostapd_data *hapd, 1786 const struct ieee80211_mgmt *mgmt, 1787 size_t len, int ok) 1788{ 1789 u16 auth_alg, auth_transaction, status_code; 1790 struct sta_info *sta; 1791 1792 if (!ok) { 1793 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1794 HOSTAPD_LEVEL_NOTICE, 1795 "did not acknowledge authentication response"); 1796 return; 1797 } 1798 1799 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 1800 printf("handle_auth_cb - too short payload (len=%lu)\n", 1801 (unsigned long) len); 1802 return; 1803 } 1804 1805 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 1806 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 1807 status_code = le_to_host16(mgmt->u.auth.status_code); 1808 1809 sta = ap_get_sta(hapd, mgmt->da); 1810 if (!sta) { 1811 printf("handle_auth_cb: STA " MACSTR " not found\n", 1812 MAC2STR(mgmt->da)); 1813 return; 1814 } 1815 1816 if (status_code == WLAN_STATUS_SUCCESS && 1817 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || 1818 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { 1819 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1820 HOSTAPD_LEVEL_INFO, "authenticated"); 1821 sta->flags |= WLAN_STA_AUTH; 1822 } 1823} 1824 1825 1826static void hostapd_set_wds_encryption(struct hostapd_data *hapd, 1827 struct sta_info *sta, 1828 char *ifname_wds) 1829{ 1830 int i; 1831 struct hostapd_ssid *ssid = sta->ssid; 1832 1833 if (hapd->conf->ieee802_1x || hapd->conf->wpa) 1834 return; 1835 1836 for (i = 0; i < 4; i++) { 1837 if (ssid->wep.key[i] && 1838 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i, 1839 i == ssid->wep.idx, NULL, 0, 1840 ssid->wep.key[i], ssid->wep.len[i])) { 1841 wpa_printf(MSG_WARNING, 1842 "Could not set WEP keys for WDS interface; %s", 1843 ifname_wds); 1844 break; 1845 } 1846 } 1847} 1848 1849 1850static void handle_assoc_cb(struct hostapd_data *hapd, 1851 const struct ieee80211_mgmt *mgmt, 1852 size_t len, int reassoc, int ok) 1853{ 1854 u16 status; 1855 struct sta_info *sta; 1856 int new_assoc = 1; 1857 struct ieee80211_ht_capabilities ht_cap; 1858 struct ieee80211_vht_capabilities vht_cap; 1859 1860 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) : 1861 sizeof(mgmt->u.assoc_resp))) { 1862 printf("handle_assoc_cb(reassoc=%d) - too short payload " 1863 "(len=%lu)\n", reassoc, (unsigned long) len); 1864 return; 1865 } 1866 1867 sta = ap_get_sta(hapd, mgmt->da); 1868 if (!sta) { 1869 printf("handle_assoc_cb: STA " MACSTR " not found\n", 1870 MAC2STR(mgmt->da)); 1871 return; 1872 } 1873 1874 if (!ok) { 1875 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1876 HOSTAPD_LEVEL_DEBUG, 1877 "did not acknowledge association response"); 1878 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK; 1879 return; 1880 } 1881 1882 if (reassoc) 1883 status = le_to_host16(mgmt->u.reassoc_resp.status_code); 1884 else 1885 status = le_to_host16(mgmt->u.assoc_resp.status_code); 1886 1887 if (status != WLAN_STATUS_SUCCESS) 1888 goto fail; 1889 1890 /* Stop previous accounting session, if one is started, and allocate 1891 * new session id for the new session. */ 1892 accounting_sta_stop(hapd, sta); 1893 1894 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1895 HOSTAPD_LEVEL_INFO, 1896 "associated (aid %d)", 1897 sta->aid); 1898 1899 if (sta->flags & WLAN_STA_ASSOC) 1900 new_assoc = 0; 1901 sta->flags |= WLAN_STA_ASSOC; 1902 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) || 1903 sta->auth_alg == WLAN_AUTH_FT) { 1904 /* 1905 * Open, static WEP, or FT protocol; no separate authorization 1906 * step. 1907 */ 1908 ap_sta_set_authorized(hapd, sta, 1); 1909 } 1910 1911 if (reassoc) 1912 mlme_reassociate_indication(hapd, sta); 1913 else 1914 mlme_associate_indication(hapd, sta); 1915 1916#ifdef CONFIG_IEEE80211W 1917 sta->sa_query_timed_out = 0; 1918#endif /* CONFIG_IEEE80211W */ 1919 1920 /* 1921 * Remove the STA entry in order to make sure the STA PS state gets 1922 * cleared and configuration gets updated in case of reassociation back 1923 * to the same AP. 1924 */ 1925 hostapd_drv_sta_remove(hapd, sta->addr); 1926 1927#ifdef CONFIG_IEEE80211N 1928 if (sta->flags & WLAN_STA_HT) 1929 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap); 1930#endif /* CONFIG_IEEE80211N */ 1931#ifdef CONFIG_IEEE80211AC 1932 if (sta->flags & WLAN_STA_VHT) 1933 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap); 1934#endif /* CONFIG_IEEE80211AC */ 1935 1936 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability, 1937 sta->supported_rates, sta->supported_rates_len, 1938 sta->listen_interval, 1939 sta->flags & WLAN_STA_HT ? &ht_cap : NULL, 1940 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL, 1941 sta->flags, sta->qosinfo)) { 1942 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1943 HOSTAPD_LEVEL_NOTICE, 1944 "Could not add STA to kernel driver"); 1945 1946 ap_sta_disconnect(hapd, sta, sta->addr, 1947 WLAN_REASON_DISASSOC_AP_BUSY); 1948 1949 goto fail; 1950 } 1951 1952 if (sta->flags & WLAN_STA_WDS) { 1953 int ret; 1954 char ifname_wds[IFNAMSIZ + 1]; 1955 1956 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr, 1957 sta->aid, 1); 1958 if (!ret) 1959 hostapd_set_wds_encryption(hapd, sta, ifname_wds); 1960 } 1961 1962 if (sta->eapol_sm == NULL) { 1963 /* 1964 * This STA does not use RADIUS server for EAP authentication, 1965 * so bind it to the selected VLAN interface now, since the 1966 * interface selection is not going to change anymore. 1967 */ 1968 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1969 goto fail; 1970 } else if (sta->vlan_id) { 1971 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */ 1972 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1973 goto fail; 1974 } 1975 1976 hostapd_set_sta_flags(hapd, sta); 1977 1978 if (sta->auth_alg == WLAN_AUTH_FT) 1979 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); 1980 else 1981 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); 1982 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc); 1983 1984 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); 1985 1986 fail: 1987 /* Copy of the association request is not needed anymore */ 1988 if (sta->last_assoc_req) { 1989 os_free(sta->last_assoc_req); 1990 sta->last_assoc_req = NULL; 1991 } 1992} 1993 1994 1995static void handle_deauth_cb(struct hostapd_data *hapd, 1996 const struct ieee80211_mgmt *mgmt, 1997 size_t len, int ok) 1998{ 1999 struct sta_info *sta; 2000 if (mgmt->da[0] & 0x01) 2001 return; 2002 sta = ap_get_sta(hapd, mgmt->da); 2003 if (!sta) { 2004 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR 2005 " not found", MAC2STR(mgmt->da)); 2006 return; 2007 } 2008 if (ok) 2009 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth", 2010 MAC2STR(sta->addr)); 2011 else 2012 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2013 "deauth", MAC2STR(sta->addr)); 2014 2015 ap_sta_deauth_cb(hapd, sta); 2016} 2017 2018 2019static void handle_disassoc_cb(struct hostapd_data *hapd, 2020 const struct ieee80211_mgmt *mgmt, 2021 size_t len, int ok) 2022{ 2023 struct sta_info *sta; 2024 if (mgmt->da[0] & 0x01) 2025 return; 2026 sta = ap_get_sta(hapd, mgmt->da); 2027 if (!sta) { 2028 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR 2029 " not found", MAC2STR(mgmt->da)); 2030 return; 2031 } 2032 if (ok) 2033 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc", 2034 MAC2STR(sta->addr)); 2035 else 2036 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2037 "disassoc", MAC2STR(sta->addr)); 2038 2039 ap_sta_disassoc_cb(hapd, sta); 2040} 2041 2042 2043/** 2044 * ieee802_11_mgmt_cb - Process management frame TX status callback 2045 * @hapd: hostapd BSS data structure (the BSS from which the management frame 2046 * was sent from) 2047 * @buf: management frame data (starting from IEEE 802.11 header) 2048 * @len: length of frame data in octets 2049 * @stype: management frame subtype from frame control field 2050 * @ok: Whether the frame was ACK'ed 2051 */ 2052void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len, 2053 u16 stype, int ok) 2054{ 2055 const struct ieee80211_mgmt *mgmt; 2056 mgmt = (const struct ieee80211_mgmt *) buf; 2057 2058 switch (stype) { 2059 case WLAN_FC_STYPE_AUTH: 2060 wpa_printf(MSG_DEBUG, "mgmt::auth cb"); 2061 handle_auth_cb(hapd, mgmt, len, ok); 2062 break; 2063 case WLAN_FC_STYPE_ASSOC_RESP: 2064 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb"); 2065 handle_assoc_cb(hapd, mgmt, len, 0, ok); 2066 break; 2067 case WLAN_FC_STYPE_REASSOC_RESP: 2068 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb"); 2069 handle_assoc_cb(hapd, mgmt, len, 1, ok); 2070 break; 2071 case WLAN_FC_STYPE_PROBE_RESP: 2072 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb"); 2073 break; 2074 case WLAN_FC_STYPE_DEAUTH: 2075 wpa_printf(MSG_DEBUG, "mgmt::deauth cb"); 2076 handle_deauth_cb(hapd, mgmt, len, ok); 2077 break; 2078 case WLAN_FC_STYPE_DISASSOC: 2079 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb"); 2080 handle_disassoc_cb(hapd, mgmt, len, ok); 2081 break; 2082 case WLAN_FC_STYPE_ACTION: 2083 wpa_printf(MSG_DEBUG, "mgmt::action cb"); 2084 break; 2085 default: 2086 printf("unknown mgmt cb frame subtype %d\n", stype); 2087 break; 2088 } 2089} 2090 2091 2092int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 2093{ 2094 /* TODO */ 2095 return 0; 2096} 2097 2098 2099int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 2100 char *buf, size_t buflen) 2101{ 2102 /* TODO */ 2103 return 0; 2104} 2105 2106 2107void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr, 2108 const u8 *buf, size_t len, int ack) 2109{ 2110 struct sta_info *sta; 2111 struct hostapd_iface *iface = hapd->iface; 2112 2113 sta = ap_get_sta(hapd, addr); 2114 if (sta == NULL && iface->num_bss > 1) { 2115 size_t j; 2116 for (j = 0; j < iface->num_bss; j++) { 2117 hapd = iface->bss[j]; 2118 sta = ap_get_sta(hapd, addr); 2119 if (sta) 2120 break; 2121 } 2122 } 2123 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) 2124 return; 2125 if (sta->flags & WLAN_STA_PENDING_POLL) { 2126 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending " 2127 "activity poll", MAC2STR(sta->addr), 2128 ack ? "ACKed" : "did not ACK"); 2129 if (ack) 2130 sta->flags &= ~WLAN_STA_PENDING_POLL; 2131 } 2132 2133 ieee802_1x_tx_status(hapd, sta, buf, len, ack); 2134} 2135 2136 2137void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst, 2138 const u8 *data, size_t len, int ack) 2139{ 2140 struct sta_info *sta; 2141 struct hostapd_iface *iface = hapd->iface; 2142 2143 sta = ap_get_sta(hapd, dst); 2144 if (sta == NULL && iface->num_bss > 1) { 2145 size_t j; 2146 for (j = 0; j < iface->num_bss; j++) { 2147 hapd = iface->bss[j]; 2148 sta = ap_get_sta(hapd, dst); 2149 if (sta) 2150 break; 2151 } 2152 } 2153 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 2154 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA " 2155 MACSTR " that is not currently associated", 2156 MAC2STR(dst)); 2157 return; 2158 } 2159 2160 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack); 2161} 2162 2163 2164void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr) 2165{ 2166 struct sta_info *sta; 2167 struct hostapd_iface *iface = hapd->iface; 2168 2169 sta = ap_get_sta(hapd, addr); 2170 if (sta == NULL && iface->num_bss > 1) { 2171 size_t j; 2172 for (j = 0; j < iface->num_bss; j++) { 2173 hapd = iface->bss[j]; 2174 sta = ap_get_sta(hapd, addr); 2175 if (sta) 2176 break; 2177 } 2178 } 2179 if (sta == NULL) 2180 return; 2181 if (!(sta->flags & WLAN_STA_PENDING_POLL)) 2182 return; 2183 2184 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending " 2185 "activity poll", MAC2STR(sta->addr)); 2186 sta->flags &= ~WLAN_STA_PENDING_POLL; 2187} 2188 2189 2190void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src, 2191 int wds) 2192{ 2193 struct sta_info *sta; 2194 2195 sta = ap_get_sta(hapd, src); 2196 if (sta && (sta->flags & WLAN_STA_ASSOC)) { 2197 if (!hapd->conf->wds_sta) 2198 return; 2199 2200 if (wds && !(sta->flags & WLAN_STA_WDS)) { 2201 int ret; 2202 char ifname_wds[IFNAMSIZ + 1]; 2203 2204 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for " 2205 "STA " MACSTR " (aid %u)", 2206 MAC2STR(sta->addr), sta->aid); 2207 sta->flags |= WLAN_STA_WDS; 2208 ret = hostapd_set_wds_sta(hapd, ifname_wds, 2209 sta->addr, sta->aid, 1); 2210 if (!ret) 2211 hostapd_set_wds_encryption(hapd, sta, 2212 ifname_wds); 2213 } 2214 return; 2215 } 2216 2217 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA " 2218 MACSTR, MAC2STR(src)); 2219 if (src[0] & 0x01) { 2220 /* Broadcast bit set in SA?! Ignore the frame silently. */ 2221 return; 2222 } 2223 2224 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) { 2225 wpa_printf(MSG_DEBUG, "Association Response to the STA has " 2226 "already been sent, but no TX status yet known - " 2227 "ignore Class 3 frame issue with " MACSTR, 2228 MAC2STR(src)); 2229 return; 2230 } 2231 2232 if (sta && (sta->flags & WLAN_STA_AUTH)) 2233 hostapd_drv_sta_disassoc( 2234 hapd, src, 2235 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2236 else 2237 hostapd_drv_sta_deauth( 2238 hapd, src, 2239 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2240} 2241 2242 2243#endif /* CONFIG_NATIVE_WINDOWS */ 2244