1 /* 2 * hostapd / IEEE 802.11 Management 3 * Copyright (c) 2002-2014, 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 "fst/fst.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 "pmksa_cache_auth.h" 34 #include "wmm.h" 35 #include "ap_list.h" 36 #include "accounting.h" 37 #include "ap_config.h" 38 #include "ap_mlme.h" 39 #include "p2p_hostapd.h" 40 #include "ap_drv_ops.h" 41 #include "wnm_ap.h" 42 #include "hw_features.h" 43 #include "ieee802_11.h" 44 #include "dfs.h" 45 46 47 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid) 48 { 49 u8 *pos = eid; 50 int i, num, count; 51 52 if (hapd->iface->current_rates == NULL) 53 return eid; 54 55 *pos++ = WLAN_EID_SUPP_RATES; 56 num = hapd->iface->num_rates; 57 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) 58 num++; 59 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) 60 num++; 61 if (num > 8) { 62 /* rest of the rates are encoded in Extended supported 63 * rates element */ 64 num = 8; 65 } 66 67 *pos++ = num; 68 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num; 69 i++) { 70 count++; 71 *pos = hapd->iface->current_rates[i].rate / 5; 72 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) 73 *pos |= 0x80; 74 pos++; 75 } 76 77 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) { 78 count++; 79 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; 80 } 81 82 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) { 83 count++; 84 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY; 85 } 86 87 return pos; 88 } 89 90 91 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid) 92 { 93 u8 *pos = eid; 94 int i, num, count; 95 96 if (hapd->iface->current_rates == NULL) 97 return eid; 98 99 num = hapd->iface->num_rates; 100 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) 101 num++; 102 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) 103 num++; 104 if (num <= 8) 105 return eid; 106 num -= 8; 107 108 *pos++ = WLAN_EID_EXT_SUPP_RATES; 109 *pos++ = num; 110 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8; 111 i++) { 112 count++; 113 if (count <= 8) 114 continue; /* already in SuppRates IE */ 115 *pos = hapd->iface->current_rates[i].rate / 5; 116 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) 117 *pos |= 0x80; 118 pos++; 119 } 120 121 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) { 122 count++; 123 if (count > 8) 124 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; 125 } 126 127 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) { 128 count++; 129 if (count > 8) 130 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY; 131 } 132 133 return pos; 134 } 135 136 137 u16 hostapd_own_capab_info(struct hostapd_data *hapd) 138 { 139 int capab = WLAN_CAPABILITY_ESS; 140 int privacy; 141 int dfs; 142 143 /* Check if any of configured channels require DFS */ 144 dfs = hostapd_is_dfs_required(hapd->iface); 145 if (dfs < 0) { 146 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d", 147 dfs); 148 dfs = 0; 149 } 150 151 if (hapd->iface->num_sta_no_short_preamble == 0 && 152 hapd->iconf->preamble == SHORT_PREAMBLE) 153 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 154 155 privacy = hapd->conf->ssid.wep.keys_set; 156 157 if (hapd->conf->ieee802_1x && 158 (hapd->conf->default_wep_key_len || 159 hapd->conf->individual_wep_key_len)) 160 privacy = 1; 161 162 if (hapd->conf->wpa) 163 privacy = 1; 164 165 #ifdef CONFIG_HS20 166 if (hapd->conf->osen) 167 privacy = 1; 168 #endif /* CONFIG_HS20 */ 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 /* 179 * Currently, Spectrum Management capability bit is set when directly 180 * requested in configuration by spectrum_mgmt_required or when AP is 181 * running on DFS channel. 182 * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit 183 */ 184 if (hapd->iface->current_mode && 185 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A && 186 (hapd->iconf->spectrum_mgmt_required || dfs)) 187 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 188 189 if (hapd->conf->radio_measurements) 190 capab |= IEEE80211_CAP_RRM; 191 192 return capab; 193 } 194 195 196 #ifndef CONFIG_NO_RC4 197 static 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_const(sta->challenge, challenge, 232 WLAN_AUTH_CHALLENGE_LEN)) { 233 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 234 HOSTAPD_LEVEL_INFO, 235 "shared key authentication - invalid " 236 "challenge-response"); 237 return WLAN_STATUS_CHALLENGE_FAIL; 238 } 239 240 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 241 HOSTAPD_LEVEL_DEBUG, 242 "authentication OK (shared key)"); 243 sta->flags |= WLAN_STA_AUTH; 244 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 245 os_free(sta->challenge); 246 sta->challenge = NULL; 247 248 return 0; 249 } 250 #endif /* CONFIG_NO_RC4 */ 251 252 253 static void send_auth_reply(struct hostapd_data *hapd, 254 const u8 *dst, const u8 *bssid, 255 u16 auth_alg, u16 auth_transaction, u16 resp, 256 const u8 *ies, size_t ies_len) 257 { 258 struct ieee80211_mgmt *reply; 259 u8 *buf; 260 size_t rlen; 261 262 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len; 263 buf = os_zalloc(rlen); 264 if (buf == NULL) 265 return; 266 267 reply = (struct ieee80211_mgmt *) buf; 268 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 269 WLAN_FC_STYPE_AUTH); 270 os_memcpy(reply->da, dst, ETH_ALEN); 271 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 272 os_memcpy(reply->bssid, bssid, ETH_ALEN); 273 274 reply->u.auth.auth_alg = host_to_le16(auth_alg); 275 reply->u.auth.auth_transaction = host_to_le16(auth_transaction); 276 reply->u.auth.status_code = host_to_le16(resp); 277 278 if (ies && ies_len) 279 os_memcpy(reply->u.auth.variable, ies, ies_len); 280 281 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR 282 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)", 283 MAC2STR(dst), auth_alg, auth_transaction, 284 resp, (unsigned long) ies_len); 285 if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0) 286 wpa_printf(MSG_INFO, "send_auth_reply: send"); 287 288 os_free(buf); 289 } 290 291 292 #ifdef CONFIG_IEEE80211R 293 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid, 294 u16 auth_transaction, u16 status, 295 const u8 *ies, size_t ies_len) 296 { 297 struct hostapd_data *hapd = ctx; 298 struct sta_info *sta; 299 300 send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction, 301 status, ies, ies_len); 302 303 if (status != WLAN_STATUS_SUCCESS) 304 return; 305 306 sta = ap_get_sta(hapd, dst); 307 if (sta == NULL) 308 return; 309 310 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211, 311 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)"); 312 sta->flags |= WLAN_STA_AUTH; 313 mlme_authenticate_indication(hapd, sta); 314 } 315 #endif /* CONFIG_IEEE80211R */ 316 317 318 #ifdef CONFIG_SAE 319 320 #define dot11RSNASAESync 5 /* attempts */ 321 322 323 static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd, 324 struct sta_info *sta, int update) 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 (update && 334 sae_prepare_commit(hapd->own_addr, sta->addr, 335 (u8 *) hapd->conf->ssid.wpa_passphrase, 336 os_strlen(hapd->conf->ssid.wpa_passphrase), 337 sta->sae) < 0) { 338 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); 339 return NULL; 340 } 341 342 buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN); 343 if (buf == NULL) 344 return NULL; 345 sae_write_commit(sta->sae, buf, sta->sae->tmp ? 346 sta->sae->tmp->anti_clogging_token : NULL); 347 348 return buf; 349 } 350 351 352 static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd, 353 struct sta_info *sta) 354 { 355 struct wpabuf *buf; 356 357 buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN); 358 if (buf == NULL) 359 return NULL; 360 361 sae_write_confirm(sta->sae, buf); 362 363 return buf; 364 } 365 366 367 static int auth_sae_send_commit(struct hostapd_data *hapd, 368 struct sta_info *sta, 369 const u8 *bssid, int update) 370 { 371 struct wpabuf *data; 372 373 data = auth_build_sae_commit(hapd, sta, update); 374 if (data == NULL) 375 return WLAN_STATUS_UNSPECIFIED_FAILURE; 376 377 send_auth_reply(hapd, sta->addr, bssid, 378 WLAN_AUTH_SAE, 1, WLAN_STATUS_SUCCESS, 379 wpabuf_head(data), wpabuf_len(data)); 380 381 wpabuf_free(data); 382 383 return WLAN_STATUS_SUCCESS; 384 } 385 386 387 static int auth_sae_send_confirm(struct hostapd_data *hapd, 388 struct sta_info *sta, 389 const u8 *bssid) 390 { 391 struct wpabuf *data; 392 393 data = auth_build_sae_confirm(hapd, sta); 394 if (data == NULL) 395 return WLAN_STATUS_UNSPECIFIED_FAILURE; 396 397 send_auth_reply(hapd, sta->addr, bssid, 398 WLAN_AUTH_SAE, 2, WLAN_STATUS_SUCCESS, 399 wpabuf_head(data), wpabuf_len(data)); 400 401 wpabuf_free(data); 402 403 return WLAN_STATUS_SUCCESS; 404 } 405 406 407 static int use_sae_anti_clogging(struct hostapd_data *hapd) 408 { 409 struct sta_info *sta; 410 unsigned int open = 0; 411 412 if (hapd->conf->sae_anti_clogging_threshold == 0) 413 return 1; 414 415 for (sta = hapd->sta_list; sta; sta = sta->next) { 416 if (!sta->sae) 417 continue; 418 if (sta->sae->state != SAE_COMMITTED && 419 sta->sae->state != SAE_CONFIRMED) 420 continue; 421 open++; 422 if (open >= hapd->conf->sae_anti_clogging_threshold) 423 return 1; 424 } 425 426 return 0; 427 } 428 429 430 static int check_sae_token(struct hostapd_data *hapd, const u8 *addr, 431 const u8 *token, size_t token_len) 432 { 433 u8 mac[SHA256_MAC_LEN]; 434 435 if (token_len != SHA256_MAC_LEN) 436 return -1; 437 if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), 438 addr, ETH_ALEN, mac) < 0 || 439 os_memcmp_const(token, mac, SHA256_MAC_LEN) != 0) 440 return -1; 441 442 return 0; 443 } 444 445 446 static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd, 447 int group, const u8 *addr) 448 { 449 struct wpabuf *buf; 450 u8 *token; 451 struct os_reltime now; 452 453 os_get_reltime(&now); 454 if (!os_reltime_initialized(&hapd->last_sae_token_key_update) || 455 os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) { 456 if (random_get_bytes(hapd->sae_token_key, 457 sizeof(hapd->sae_token_key)) < 0) 458 return NULL; 459 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key", 460 hapd->sae_token_key, sizeof(hapd->sae_token_key)); 461 hapd->last_sae_token_key_update = now; 462 } 463 464 buf = wpabuf_alloc(sizeof(le16) + SHA256_MAC_LEN); 465 if (buf == NULL) 466 return NULL; 467 468 wpabuf_put_le16(buf, group); /* Finite Cyclic Group */ 469 470 token = wpabuf_put(buf, SHA256_MAC_LEN); 471 hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), 472 addr, ETH_ALEN, token); 473 474 return buf; 475 } 476 477 478 static int sae_check_big_sync(struct sta_info *sta) 479 { 480 if (sta->sae->sync > dot11RSNASAESync) { 481 sta->sae->state = SAE_NOTHING; 482 sta->sae->sync = 0; 483 return -1; 484 } 485 return 0; 486 } 487 488 489 static void auth_sae_retransmit_timer(void *eloop_ctx, void *eloop_data) 490 { 491 struct hostapd_data *hapd = eloop_ctx; 492 struct sta_info *sta = eloop_data; 493 int ret; 494 495 if (sae_check_big_sync(sta)) 496 return; 497 sta->sae->sync++; 498 499 switch (sta->sae->state) { 500 case SAE_COMMITTED: 501 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0); 502 eloop_register_timeout(0, 503 hapd->dot11RSNASAERetransPeriod * 1000, 504 auth_sae_retransmit_timer, hapd, sta); 505 break; 506 case SAE_CONFIRMED: 507 ret = auth_sae_send_confirm(hapd, sta, hapd->own_addr); 508 eloop_register_timeout(0, 509 hapd->dot11RSNASAERetransPeriod * 1000, 510 auth_sae_retransmit_timer, hapd, sta); 511 break; 512 default: 513 ret = -1; 514 break; 515 } 516 517 if (ret != WLAN_STATUS_SUCCESS) 518 wpa_printf(MSG_INFO, "SAE: Failed to retransmit: ret=%d", ret); 519 } 520 521 522 void sae_clear_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta) 523 { 524 eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta); 525 } 526 527 528 static void sae_set_retransmit_timer(struct hostapd_data *hapd, 529 struct sta_info *sta) 530 { 531 if (!(hapd->conf->mesh & MESH_ENABLED)) 532 return; 533 534 eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta); 535 eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000, 536 auth_sae_retransmit_timer, hapd, sta); 537 } 538 539 540 static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta, 541 const u8 *bssid, u8 auth_transaction) 542 { 543 int ret; 544 545 if (auth_transaction != 1 && auth_transaction != 2) 546 return WLAN_STATUS_UNSPECIFIED_FAILURE; 547 548 switch (sta->sae->state) { 549 case SAE_NOTHING: 550 if (auth_transaction == 1) { 551 ret = auth_sae_send_commit(hapd, sta, bssid, 1); 552 if (ret) 553 return ret; 554 sta->sae->state = SAE_COMMITTED; 555 556 if (sae_process_commit(sta->sae) < 0) 557 return WLAN_STATUS_UNSPECIFIED_FAILURE; 558 559 /* 560 * In mesh case, both Commit and Confirm can be sent 561 * immediately. In infrastructure BSS, only a single 562 * Authentication frame (Commit) is expected from the AP 563 * here and the second one (Confirm) will be sent once 564 * the STA has sent its second Authentication frame 565 * (Confirm). 566 */ 567 if (hapd->conf->mesh & MESH_ENABLED) { 568 /* 569 * Send both Commit and Confirm immediately 570 * based on SAE finite state machine 571 * Nothing -> Confirm transition. 572 */ 573 ret = auth_sae_send_confirm(hapd, sta, bssid); 574 if (ret) 575 return ret; 576 sta->sae->state = SAE_CONFIRMED; 577 } else { 578 /* 579 * For infrastructure BSS, send only the Commit 580 * message now to get alternating sequence of 581 * Authentication frames between the AP and STA. 582 * Confirm will be sent in 583 * Commited -> Confirmed/Accepted transition 584 * when receiving Confirm from STA. 585 */ 586 } 587 sta->sae->sync = 0; 588 sae_set_retransmit_timer(hapd, sta); 589 } else { 590 hostapd_logger(hapd, sta->addr, 591 HOSTAPD_MODULE_IEEE80211, 592 HOSTAPD_LEVEL_DEBUG, 593 "SAE confirm before commit"); 594 } 595 break; 596 case SAE_COMMITTED: 597 sae_clear_retransmit_timer(hapd, sta); 598 if (auth_transaction == 1) { 599 if (sae_process_commit(sta->sae) < 0) 600 return WLAN_STATUS_UNSPECIFIED_FAILURE; 601 602 ret = auth_sae_send_confirm(hapd, sta, bssid); 603 if (ret) 604 return ret; 605 sta->sae->state = SAE_CONFIRMED; 606 sta->sae->sync = 0; 607 sae_set_retransmit_timer(hapd, sta); 608 } else if (hapd->conf->mesh & MESH_ENABLED) { 609 /* 610 * In mesh case, follow SAE finite state machine and 611 * send Commit now, if sync count allows. 612 */ 613 if (sae_check_big_sync(sta)) 614 return WLAN_STATUS_SUCCESS; 615 sta->sae->sync++; 616 617 ret = auth_sae_send_commit(hapd, sta, bssid, 0); 618 if (ret) 619 return ret; 620 621 sae_set_retransmit_timer(hapd, sta); 622 } else { 623 /* 624 * For instructure BSS, send the postponed Confirm from 625 * Nothing -> Confirmed transition that was reduced to 626 * Nothing -> Committed above. 627 */ 628 ret = auth_sae_send_confirm(hapd, sta, bssid); 629 if (ret) 630 return ret; 631 632 sta->sae->state = SAE_CONFIRMED; 633 634 /* 635 * Since this was triggered on Confirm RX, run another 636 * step to get to Accepted without waiting for 637 * additional events. 638 */ 639 return sae_sm_step(hapd, sta, bssid, auth_transaction); 640 } 641 break; 642 case SAE_CONFIRMED: 643 sae_clear_retransmit_timer(hapd, sta); 644 if (auth_transaction == 1) { 645 if (sae_check_big_sync(sta)) 646 return WLAN_STATUS_SUCCESS; 647 sta->sae->sync++; 648 649 ret = auth_sae_send_commit(hapd, sta, bssid, 1); 650 if (ret) 651 return ret; 652 653 if (sae_process_commit(sta->sae) < 0) 654 return WLAN_STATUS_UNSPECIFIED_FAILURE; 655 656 ret = auth_sae_send_confirm(hapd, sta, bssid); 657 if (ret) 658 return ret; 659 660 sae_set_retransmit_timer(hapd, sta); 661 } else { 662 sta->flags |= WLAN_STA_AUTH; 663 sta->auth_alg = WLAN_AUTH_SAE; 664 mlme_authenticate_indication(hapd, sta); 665 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 666 sta->sae->state = SAE_ACCEPTED; 667 wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr, 668 sta->sae->pmk); 669 } 670 break; 671 case SAE_ACCEPTED: 672 if (auth_transaction == 1) { 673 wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR 674 ") doing reauthentication", 675 MAC2STR(sta->addr)); 676 ap_free_sta(hapd, sta); 677 } else { 678 if (sae_check_big_sync(sta)) 679 return WLAN_STATUS_SUCCESS; 680 sta->sae->sync++; 681 682 ret = auth_sae_send_confirm(hapd, sta, bssid); 683 sae_clear_temp_data(sta->sae); 684 if (ret) 685 return ret; 686 } 687 break; 688 default: 689 wpa_printf(MSG_ERROR, "SAE: invalid state %d", 690 sta->sae->state); 691 return WLAN_STATUS_UNSPECIFIED_FAILURE; 692 } 693 return WLAN_STATUS_SUCCESS; 694 } 695 696 697 static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta, 698 const struct ieee80211_mgmt *mgmt, size_t len, 699 u16 auth_transaction, u16 status_code) 700 { 701 u16 resp = WLAN_STATUS_SUCCESS; 702 struct wpabuf *data = NULL; 703 704 if (!sta->sae) { 705 if (auth_transaction != 1 || status_code != WLAN_STATUS_SUCCESS) 706 return; 707 sta->sae = os_zalloc(sizeof(*sta->sae)); 708 if (sta->sae == NULL) 709 return; 710 sta->sae->state = SAE_NOTHING; 711 sta->sae->sync = 0; 712 } 713 714 if (auth_transaction == 1) { 715 const u8 *token = NULL, *pos, *end; 716 size_t token_len = 0; 717 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 718 HOSTAPD_LEVEL_DEBUG, 719 "start SAE authentication (RX commit, status=%u)", 720 status_code); 721 722 if ((hapd->conf->mesh & MESH_ENABLED) && 723 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ && 724 sta->sae->tmp) { 725 pos = mgmt->u.auth.variable; 726 end = ((const u8 *) mgmt) + len; 727 if (pos + sizeof(le16) > end) { 728 wpa_printf(MSG_ERROR, 729 "SAE: Too short anti-clogging token request"); 730 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 731 goto reply; 732 } 733 resp = sae_group_allowed(sta->sae, 734 hapd->conf->sae_groups, 735 WPA_GET_LE16(pos)); 736 if (resp != WLAN_STATUS_SUCCESS) { 737 wpa_printf(MSG_ERROR, 738 "SAE: Invalid group in anti-clogging token request"); 739 goto reply; 740 } 741 pos += sizeof(le16); 742 743 wpabuf_free(sta->sae->tmp->anti_clogging_token); 744 sta->sae->tmp->anti_clogging_token = 745 wpabuf_alloc_copy(pos, end - pos); 746 if (sta->sae->tmp->anti_clogging_token == NULL) { 747 wpa_printf(MSG_ERROR, 748 "SAE: Failed to alloc for anti-clogging token"); 749 return; 750 } 751 752 /* 753 * IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code 754 * is 76, a new Commit Message shall be constructed 755 * with the Anti-Clogging Token from the received 756 * Authentication frame, and the commit-scalar and 757 * COMMIT-ELEMENT previously sent. 758 */ 759 if (auth_sae_send_commit(hapd, sta, mgmt->bssid, 0)) { 760 wpa_printf(MSG_ERROR, 761 "SAE: Failed to send commit message"); 762 return; 763 } 764 sta->sae->state = SAE_COMMITTED; 765 sta->sae->sync = 0; 766 sae_set_retransmit_timer(hapd, sta); 767 return; 768 } 769 770 if (status_code != WLAN_STATUS_SUCCESS) 771 return; 772 773 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable, 774 ((const u8 *) mgmt) + len - 775 mgmt->u.auth.variable, &token, 776 &token_len, hapd->conf->sae_groups); 777 if (resp == SAE_SILENTLY_DISCARD) { 778 wpa_printf(MSG_DEBUG, 779 "SAE: Drop commit message from " MACSTR " due to reflection attack", 780 MAC2STR(sta->addr)); 781 return; 782 } 783 if (token && check_sae_token(hapd, sta->addr, token, token_len) 784 < 0) { 785 wpa_printf(MSG_DEBUG, "SAE: Drop commit message with " 786 "incorrect token from " MACSTR, 787 MAC2STR(sta->addr)); 788 return; 789 } 790 791 if (resp != WLAN_STATUS_SUCCESS) 792 goto reply; 793 794 if (!token && use_sae_anti_clogging(hapd)) { 795 wpa_printf(MSG_DEBUG, 796 "SAE: Request anti-clogging token from " 797 MACSTR, MAC2STR(sta->addr)); 798 data = auth_build_token_req(hapd, sta->sae->group, 799 sta->addr); 800 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ; 801 if (hapd->conf->mesh & MESH_ENABLED) 802 sta->sae->state = SAE_NOTHING; 803 goto reply; 804 } 805 806 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction); 807 } else if (auth_transaction == 2) { 808 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 809 HOSTAPD_LEVEL_DEBUG, 810 "SAE authentication (RX confirm, status=%u)", 811 status_code); 812 if (status_code != WLAN_STATUS_SUCCESS) 813 return; 814 if (sta->sae->state >= SAE_CONFIRMED || 815 !(hapd->conf->mesh & MESH_ENABLED)) { 816 if (sae_check_confirm(sta->sae, mgmt->u.auth.variable, 817 ((u8 *) mgmt) + len - 818 mgmt->u.auth.variable) < 0) { 819 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 820 goto reply; 821 } 822 } 823 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction); 824 } else { 825 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 826 HOSTAPD_LEVEL_DEBUG, 827 "unexpected SAE authentication transaction %u (status=%u)", 828 auth_transaction, status_code); 829 if (status_code != WLAN_STATUS_SUCCESS) 830 return; 831 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 832 } 833 834 reply: 835 if (resp != WLAN_STATUS_SUCCESS) { 836 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE, 837 auth_transaction, resp, 838 data ? wpabuf_head(data) : (u8 *) "", 839 data ? wpabuf_len(data) : 0); 840 } 841 wpabuf_free(data); 842 } 843 844 845 /** 846 * auth_sae_init_committed - Send COMMIT and start SAE in committed state 847 * @hapd: BSS data for the device initiating the authentication 848 * @sta: the peer to which commit authentication frame is sent 849 * 850 * This function implements Init event handling (IEEE Std 802.11-2012, 851 * 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the 852 * sta->sae structure should be initialized appropriately via a call to 853 * sae_prepare_commit(). 854 */ 855 int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta) 856 { 857 int ret; 858 859 if (!sta->sae || !sta->sae->tmp) 860 return -1; 861 862 if (sta->sae->state != SAE_NOTHING) 863 return -1; 864 865 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0); 866 if (ret) 867 return -1; 868 869 sta->sae->state = SAE_COMMITTED; 870 sta->sae->sync = 0; 871 sae_set_retransmit_timer(hapd, sta); 872 873 return 0; 874 } 875 876 #endif /* CONFIG_SAE */ 877 878 879 static void handle_auth(struct hostapd_data *hapd, 880 const struct ieee80211_mgmt *mgmt, size_t len) 881 { 882 u16 auth_alg, auth_transaction, status_code; 883 u16 resp = WLAN_STATUS_SUCCESS; 884 struct sta_info *sta = NULL; 885 int res; 886 u16 fc; 887 const u8 *challenge = NULL; 888 u32 session_timeout, acct_interim_interval; 889 int vlan_id = 0; 890 struct hostapd_sta_wpa_psk_short *psk = NULL; 891 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; 892 size_t resp_ies_len = 0; 893 char *identity = NULL; 894 char *radius_cui = NULL; 895 u16 seq_ctrl; 896 897 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 898 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)", 899 (unsigned long) len); 900 return; 901 } 902 903 #ifdef CONFIG_TESTING_OPTIONS 904 if (hapd->iconf->ignore_auth_probability > 0.0 && 905 drand48() < hapd->iconf->ignore_auth_probability) { 906 wpa_printf(MSG_INFO, 907 "TESTING: ignoring auth frame from " MACSTR, 908 MAC2STR(mgmt->sa)); 909 return; 910 } 911 #endif /* CONFIG_TESTING_OPTIONS */ 912 913 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 914 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 915 status_code = le_to_host16(mgmt->u.auth.status_code); 916 fc = le_to_host16(mgmt->frame_control); 917 seq_ctrl = le_to_host16(mgmt->seq_ctrl); 918 919 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 920 2 + WLAN_AUTH_CHALLENGE_LEN && 921 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE && 922 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN) 923 challenge = &mgmt->u.auth.variable[2]; 924 925 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d " 926 "auth_transaction=%d status_code=%d wep=%d%s " 927 "seq_ctrl=0x%x%s", 928 MAC2STR(mgmt->sa), auth_alg, auth_transaction, 929 status_code, !!(fc & WLAN_FC_ISWEP), 930 challenge ? " challenge" : "", 931 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : ""); 932 933 #ifdef CONFIG_NO_RC4 934 if (auth_alg == WLAN_AUTH_SHARED_KEY) { 935 wpa_printf(MSG_INFO, 936 "Unsupported authentication algorithm (%d)", 937 auth_alg); 938 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 939 goto fail; 940 } 941 #endif /* CONFIG_NO_RC4 */ 942 943 if (hapd->tkip_countermeasures) { 944 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 945 goto fail; 946 } 947 948 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) && 949 auth_alg == WLAN_AUTH_OPEN) || 950 #ifdef CONFIG_IEEE80211R 951 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && 952 auth_alg == WLAN_AUTH_FT) || 953 #endif /* CONFIG_IEEE80211R */ 954 #ifdef CONFIG_SAE 955 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) && 956 auth_alg == WLAN_AUTH_SAE) || 957 #endif /* CONFIG_SAE */ 958 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) && 959 auth_alg == WLAN_AUTH_SHARED_KEY))) { 960 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)", 961 auth_alg); 962 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 963 goto fail; 964 } 965 966 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE || 967 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) { 968 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)", 969 auth_transaction); 970 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 971 goto fail; 972 } 973 974 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { 975 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", 976 MAC2STR(mgmt->sa)); 977 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 978 goto fail; 979 } 980 981 if (hapd->conf->no_auth_if_seen_on) { 982 struct hostapd_data *other; 983 984 other = sta_track_seen_on(hapd->iface, mgmt->sa, 985 hapd->conf->no_auth_if_seen_on); 986 if (other) { 987 u8 *pos; 988 u32 info; 989 u8 op_class, channel, phytype; 990 991 wpa_printf(MSG_DEBUG, "%s: Reject authentication from " 992 MACSTR " since STA has been seen on %s", 993 hapd->conf->iface, MAC2STR(mgmt->sa), 994 hapd->conf->no_auth_if_seen_on); 995 996 resp = WLAN_STATUS_REJECTED_WITH_SUGGESTED_BSS_TRANSITION; 997 pos = &resp_ies[0]; 998 *pos++ = WLAN_EID_NEIGHBOR_REPORT; 999 *pos++ = 13; 1000 os_memcpy(pos, other->own_addr, ETH_ALEN); 1001 pos += ETH_ALEN; 1002 info = 0; /* TODO: BSSID Information */ 1003 WPA_PUT_LE32(pos, info); 1004 pos += 4; 1005 if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD) 1006 phytype = 8; /* dmg */ 1007 else if (other->iconf->ieee80211ac) 1008 phytype = 9; /* vht */ 1009 else if (other->iconf->ieee80211n) 1010 phytype = 7; /* ht */ 1011 else if (other->iconf->hw_mode == 1012 HOSTAPD_MODE_IEEE80211A) 1013 phytype = 4; /* ofdm */ 1014 else if (other->iconf->hw_mode == 1015 HOSTAPD_MODE_IEEE80211G) 1016 phytype = 6; /* erp */ 1017 else 1018 phytype = 5; /* hrdsss */ 1019 if (ieee80211_freq_to_channel_ext( 1020 hostapd_hw_get_freq(other, 1021 other->iconf->channel), 1022 other->iconf->secondary_channel, 1023 other->iconf->ieee80211ac, 1024 &op_class, &channel) == NUM_HOSTAPD_MODES) { 1025 op_class = 0; 1026 channel = other->iconf->channel; 1027 } 1028 *pos++ = op_class; 1029 *pos++ = channel; 1030 *pos++ = phytype; 1031 resp_ies_len = pos - &resp_ies[0]; 1032 goto fail; 1033 } 1034 } 1035 1036 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len, 1037 &session_timeout, 1038 &acct_interim_interval, &vlan_id, 1039 &psk, &identity, &radius_cui); 1040 1041 if (res == HOSTAPD_ACL_REJECT) { 1042 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", 1043 MAC2STR(mgmt->sa)); 1044 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 1045 goto fail; 1046 } 1047 if (res == HOSTAPD_ACL_PENDING) { 1048 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR 1049 " waiting for an external authentication", 1050 MAC2STR(mgmt->sa)); 1051 /* Authentication code will re-send the authentication frame 1052 * after it has received (and cached) information from the 1053 * external source. */ 1054 return; 1055 } 1056 1057 sta = ap_get_sta(hapd, mgmt->sa); 1058 if (sta) { 1059 if ((fc & WLAN_FC_RETRY) && 1060 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ && 1061 sta->last_seq_ctrl == seq_ctrl && 1062 sta->last_subtype == WLAN_FC_STYPE_AUTH) { 1063 hostapd_logger(hapd, sta->addr, 1064 HOSTAPD_MODULE_IEEE80211, 1065 HOSTAPD_LEVEL_DEBUG, 1066 "Drop repeated authentication frame seq_ctrl=0x%x", 1067 seq_ctrl); 1068 return; 1069 } 1070 } else { 1071 #ifdef CONFIG_MESH 1072 if (hapd->conf->mesh & MESH_ENABLED) { 1073 /* if the mesh peer is not available, we don't do auth. 1074 */ 1075 wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR 1076 " not yet known - drop Authentiation frame", 1077 MAC2STR(mgmt->sa)); 1078 /* 1079 * Save a copy of the frame so that it can be processed 1080 * if a new peer entry is added shortly after this. 1081 */ 1082 wpabuf_free(hapd->mesh_pending_auth); 1083 hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len); 1084 os_get_reltime(&hapd->mesh_pending_auth_time); 1085 return; 1086 } 1087 #endif /* CONFIG_MESH */ 1088 1089 sta = ap_sta_add(hapd, mgmt->sa); 1090 if (!sta) { 1091 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 1092 goto fail; 1093 } 1094 } 1095 sta->last_seq_ctrl = seq_ctrl; 1096 sta->last_subtype = WLAN_FC_STYPE_AUTH; 1097 1098 if (vlan_id > 0) { 1099 if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) { 1100 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 1101 HOSTAPD_LEVEL_INFO, "Invalid VLAN ID " 1102 "%d received from RADIUS server", 1103 vlan_id); 1104 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 1105 goto fail; 1106 } 1107 sta->vlan_id = vlan_id; 1108 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 1109 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); 1110 } 1111 1112 hostapd_free_psk_list(sta->psk); 1113 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) { 1114 sta->psk = psk; 1115 psk = NULL; 1116 } else { 1117 sta->psk = NULL; 1118 } 1119 1120 sta->identity = identity; 1121 identity = NULL; 1122 sta->radius_cui = radius_cui; 1123 radius_cui = NULL; 1124 1125 sta->flags &= ~WLAN_STA_PREAUTH; 1126 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); 1127 1128 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval) 1129 sta->acct_interim_interval = acct_interim_interval; 1130 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) 1131 ap_sta_session_timeout(hapd, sta, session_timeout); 1132 else 1133 ap_sta_no_session_timeout(hapd, sta); 1134 1135 switch (auth_alg) { 1136 case WLAN_AUTH_OPEN: 1137 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1138 HOSTAPD_LEVEL_DEBUG, 1139 "authentication OK (open system)"); 1140 sta->flags |= WLAN_STA_AUTH; 1141 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 1142 sta->auth_alg = WLAN_AUTH_OPEN; 1143 mlme_authenticate_indication(hapd, sta); 1144 break; 1145 #ifndef CONFIG_NO_RC4 1146 case WLAN_AUTH_SHARED_KEY: 1147 resp = auth_shared_key(hapd, sta, auth_transaction, challenge, 1148 fc & WLAN_FC_ISWEP); 1149 sta->auth_alg = WLAN_AUTH_SHARED_KEY; 1150 mlme_authenticate_indication(hapd, sta); 1151 if (sta->challenge && auth_transaction == 1) { 1152 resp_ies[0] = WLAN_EID_CHALLENGE; 1153 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN; 1154 os_memcpy(resp_ies + 2, sta->challenge, 1155 WLAN_AUTH_CHALLENGE_LEN); 1156 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN; 1157 } 1158 break; 1159 #endif /* CONFIG_NO_RC4 */ 1160 #ifdef CONFIG_IEEE80211R 1161 case WLAN_AUTH_FT: 1162 sta->auth_alg = WLAN_AUTH_FT; 1163 if (sta->wpa_sm == NULL) 1164 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 1165 sta->addr, NULL); 1166 if (sta->wpa_sm == NULL) { 1167 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " 1168 "state machine"); 1169 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 1170 goto fail; 1171 } 1172 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid, 1173 auth_transaction, mgmt->u.auth.variable, 1174 len - IEEE80211_HDRLEN - 1175 sizeof(mgmt->u.auth), 1176 handle_auth_ft_finish, hapd); 1177 /* handle_auth_ft_finish() callback will complete auth. */ 1178 return; 1179 #endif /* CONFIG_IEEE80211R */ 1180 #ifdef CONFIG_SAE 1181 case WLAN_AUTH_SAE: 1182 #ifdef CONFIG_MESH 1183 if (status_code == WLAN_STATUS_SUCCESS && 1184 hapd->conf->mesh & MESH_ENABLED) { 1185 if (sta->wpa_sm == NULL) 1186 sta->wpa_sm = 1187 wpa_auth_sta_init(hapd->wpa_auth, 1188 sta->addr, NULL); 1189 if (sta->wpa_sm == NULL) { 1190 wpa_printf(MSG_DEBUG, 1191 "SAE: Failed to initialize WPA state machine"); 1192 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 1193 goto fail; 1194 } 1195 } 1196 #endif /* CONFIG_MESH */ 1197 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction, 1198 status_code); 1199 return; 1200 #endif /* CONFIG_SAE */ 1201 } 1202 1203 fail: 1204 os_free(identity); 1205 os_free(radius_cui); 1206 hostapd_free_psk_list(psk); 1207 1208 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg, 1209 auth_transaction + 1, resp, resp_ies, resp_ies_len); 1210 } 1211 1212 1213 static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta) 1214 { 1215 int i, j = 32, aid; 1216 1217 /* get a unique AID */ 1218 if (sta->aid > 0) { 1219 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid); 1220 return 0; 1221 } 1222 1223 for (i = 0; i < AID_WORDS; i++) { 1224 if (hapd->sta_aid[i] == (u32) -1) 1225 continue; 1226 for (j = 0; j < 32; j++) { 1227 if (!(hapd->sta_aid[i] & BIT(j))) 1228 break; 1229 } 1230 if (j < 32) 1231 break; 1232 } 1233 if (j == 32) 1234 return -1; 1235 aid = i * 32 + j + 1; 1236 if (aid > 2007) 1237 return -1; 1238 1239 sta->aid = aid; 1240 hapd->sta_aid[i] |= BIT(j); 1241 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid); 1242 return 0; 1243 } 1244 1245 1246 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta, 1247 const u8 *ssid_ie, size_t ssid_ie_len) 1248 { 1249 if (ssid_ie == NULL) 1250 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1251 1252 if (ssid_ie_len != hapd->conf->ssid.ssid_len || 1253 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) { 1254 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1255 HOSTAPD_LEVEL_INFO, 1256 "Station tried to associate with unknown SSID " 1257 "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len)); 1258 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1259 } 1260 1261 return WLAN_STATUS_SUCCESS; 1262 } 1263 1264 1265 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta, 1266 const u8 *wmm_ie, size_t wmm_ie_len) 1267 { 1268 sta->flags &= ~WLAN_STA_WMM; 1269 sta->qosinfo = 0; 1270 if (wmm_ie && hapd->conf->wmm_enabled) { 1271 struct wmm_information_element *wmm; 1272 1273 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) { 1274 hostapd_logger(hapd, sta->addr, 1275 HOSTAPD_MODULE_WPA, 1276 HOSTAPD_LEVEL_DEBUG, 1277 "invalid WMM element in association " 1278 "request"); 1279 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1280 } 1281 1282 sta->flags |= WLAN_STA_WMM; 1283 wmm = (struct wmm_information_element *) wmm_ie; 1284 sta->qosinfo = wmm->qos_info; 1285 } 1286 return WLAN_STATUS_SUCCESS; 1287 } 1288 1289 1290 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta, 1291 struct ieee802_11_elems *elems) 1292 { 1293 if (!elems->supp_rates) { 1294 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1295 HOSTAPD_LEVEL_DEBUG, 1296 "No supported rates element in AssocReq"); 1297 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1298 } 1299 1300 if (elems->supp_rates_len + elems->ext_supp_rates_len > 1301 sizeof(sta->supported_rates)) { 1302 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1303 HOSTAPD_LEVEL_DEBUG, 1304 "Invalid supported rates element length %d+%d", 1305 elems->supp_rates_len, 1306 elems->ext_supp_rates_len); 1307 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1308 } 1309 1310 sta->supported_rates_len = merge_byte_arrays( 1311 sta->supported_rates, sizeof(sta->supported_rates), 1312 elems->supp_rates, elems->supp_rates_len, 1313 elems->ext_supp_rates, elems->ext_supp_rates_len); 1314 1315 return WLAN_STATUS_SUCCESS; 1316 } 1317 1318 1319 static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta, 1320 const u8 *ext_capab_ie, size_t ext_capab_ie_len) 1321 { 1322 #ifdef CONFIG_INTERWORKING 1323 /* check for QoS Map support */ 1324 if (ext_capab_ie_len >= 5) { 1325 if (ext_capab_ie[4] & 0x01) 1326 sta->qos_map_enabled = 1; 1327 } 1328 #endif /* CONFIG_INTERWORKING */ 1329 1330 return WLAN_STATUS_SUCCESS; 1331 } 1332 1333 1334 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, 1335 const u8 *ies, size_t ies_len, int reassoc) 1336 { 1337 struct ieee802_11_elems elems; 1338 u16 resp; 1339 const u8 *wpa_ie; 1340 size_t wpa_ie_len; 1341 const u8 *p2p_dev_addr = NULL; 1342 1343 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { 1344 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1345 HOSTAPD_LEVEL_INFO, "Station sent an invalid " 1346 "association request"); 1347 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1348 } 1349 1350 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len); 1351 if (resp != WLAN_STATUS_SUCCESS) 1352 return resp; 1353 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len); 1354 if (resp != WLAN_STATUS_SUCCESS) 1355 return resp; 1356 resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len); 1357 if (resp != WLAN_STATUS_SUCCESS) 1358 return resp; 1359 resp = copy_supp_rates(hapd, sta, &elems); 1360 if (resp != WLAN_STATUS_SUCCESS) 1361 return resp; 1362 #ifdef CONFIG_IEEE80211N 1363 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities); 1364 if (resp != WLAN_STATUS_SUCCESS) 1365 return resp; 1366 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && 1367 !(sta->flags & WLAN_STA_HT)) { 1368 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1369 HOSTAPD_LEVEL_INFO, "Station does not support " 1370 "mandatory HT PHY - reject association"); 1371 return WLAN_STATUS_ASSOC_DENIED_NO_HT; 1372 } 1373 #endif /* CONFIG_IEEE80211N */ 1374 1375 #ifdef CONFIG_IEEE80211AC 1376 if (hapd->iconf->ieee80211ac) { 1377 resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities); 1378 if (resp != WLAN_STATUS_SUCCESS) 1379 return resp; 1380 1381 resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif); 1382 if (resp != WLAN_STATUS_SUCCESS) 1383 return resp; 1384 } 1385 1386 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && 1387 !(sta->flags & WLAN_STA_VHT)) { 1388 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1389 HOSTAPD_LEVEL_INFO, "Station does not support " 1390 "mandatory VHT PHY - reject association"); 1391 return WLAN_STATUS_ASSOC_DENIED_NO_VHT; 1392 } 1393 1394 if (hapd->conf->vendor_vht && !elems.vht_capabilities) { 1395 resp = copy_sta_vendor_vht(hapd, sta, elems.vendor_vht, 1396 elems.vendor_vht_len); 1397 if (resp != WLAN_STATUS_SUCCESS) 1398 return resp; 1399 } 1400 #endif /* CONFIG_IEEE80211AC */ 1401 1402 #ifdef CONFIG_P2P 1403 if (elems.p2p) { 1404 wpabuf_free(sta->p2p_ie); 1405 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 1406 P2P_IE_VENDOR_TYPE); 1407 if (sta->p2p_ie) 1408 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie); 1409 } else { 1410 wpabuf_free(sta->p2p_ie); 1411 sta->p2p_ie = NULL; 1412 } 1413 #endif /* CONFIG_P2P */ 1414 1415 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { 1416 wpa_ie = elems.rsn_ie; 1417 wpa_ie_len = elems.rsn_ie_len; 1418 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) && 1419 elems.wpa_ie) { 1420 wpa_ie = elems.wpa_ie; 1421 wpa_ie_len = elems.wpa_ie_len; 1422 } else { 1423 wpa_ie = NULL; 1424 wpa_ie_len = 0; 1425 } 1426 1427 #ifdef CONFIG_WPS 1428 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2); 1429 if (hapd->conf->wps_state && elems.wps_ie) { 1430 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association " 1431 "Request - assume WPS is used"); 1432 sta->flags |= WLAN_STA_WPS; 1433 wpabuf_free(sta->wps_ie); 1434 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 1435 WPS_IE_VENDOR_TYPE); 1436 if (sta->wps_ie && wps_is_20(sta->wps_ie)) { 1437 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0"); 1438 sta->flags |= WLAN_STA_WPS2; 1439 } 1440 wpa_ie = NULL; 1441 wpa_ie_len = 0; 1442 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) { 1443 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in " 1444 "(Re)Association Request - reject"); 1445 return WLAN_STATUS_INVALID_IE; 1446 } 1447 } else if (hapd->conf->wps_state && wpa_ie == NULL) { 1448 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in " 1449 "(Re)Association Request - possible WPS use"); 1450 sta->flags |= WLAN_STA_MAYBE_WPS; 1451 } else 1452 #endif /* CONFIG_WPS */ 1453 if (hapd->conf->wpa && wpa_ie == NULL) { 1454 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1455 HOSTAPD_LEVEL_INFO, 1456 "No WPA/RSN IE in association request"); 1457 return WLAN_STATUS_INVALID_IE; 1458 } 1459 1460 if (hapd->conf->wpa && wpa_ie) { 1461 int res; 1462 wpa_ie -= 2; 1463 wpa_ie_len += 2; 1464 if (sta->wpa_sm == NULL) 1465 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 1466 sta->addr, 1467 p2p_dev_addr); 1468 if (sta->wpa_sm == NULL) { 1469 wpa_printf(MSG_WARNING, "Failed to initialize WPA " 1470 "state machine"); 1471 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1472 } 1473 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, 1474 wpa_ie, wpa_ie_len, 1475 elems.mdie, elems.mdie_len); 1476 if (res == WPA_INVALID_GROUP) 1477 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; 1478 else if (res == WPA_INVALID_PAIRWISE) 1479 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; 1480 else if (res == WPA_INVALID_AKMP) 1481 resp = WLAN_STATUS_AKMP_NOT_VALID; 1482 else if (res == WPA_ALLOC_FAIL) 1483 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 1484 #ifdef CONFIG_IEEE80211W 1485 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) 1486 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 1487 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) 1488 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 1489 #endif /* CONFIG_IEEE80211W */ 1490 else if (res == WPA_INVALID_MDIE) 1491 resp = WLAN_STATUS_INVALID_MDIE; 1492 else if (res != WPA_IE_OK) 1493 resp = WLAN_STATUS_INVALID_IE; 1494 if (resp != WLAN_STATUS_SUCCESS) 1495 return resp; 1496 #ifdef CONFIG_IEEE80211W 1497 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1498 sta->sa_query_count > 0) 1499 ap_check_sa_query_timeout(hapd, sta); 1500 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 1501 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) { 1502 /* 1503 * STA has already been associated with MFP and SA 1504 * Query timeout has not been reached. Reject the 1505 * association attempt temporarily and start SA Query, 1506 * if one is not pending. 1507 */ 1508 1509 if (sta->sa_query_count == 0) 1510 ap_sta_start_sa_query(hapd, sta); 1511 1512 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; 1513 } 1514 1515 if (wpa_auth_uses_mfp(sta->wpa_sm)) 1516 sta->flags |= WLAN_STA_MFP; 1517 else 1518 sta->flags &= ~WLAN_STA_MFP; 1519 #endif /* CONFIG_IEEE80211W */ 1520 1521 #ifdef CONFIG_IEEE80211R 1522 if (sta->auth_alg == WLAN_AUTH_FT) { 1523 if (!reassoc) { 1524 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried " 1525 "to use association (not " 1526 "re-association) with FT auth_alg", 1527 MAC2STR(sta->addr)); 1528 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1529 } 1530 1531 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies, 1532 ies_len); 1533 if (resp != WLAN_STATUS_SUCCESS) 1534 return resp; 1535 } 1536 #endif /* CONFIG_IEEE80211R */ 1537 1538 #ifdef CONFIG_SAE 1539 if (wpa_auth_uses_sae(sta->wpa_sm) && 1540 sta->auth_alg == WLAN_AUTH_OPEN) { 1541 struct rsn_pmksa_cache_entry *sa; 1542 sa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 1543 if (!sa || sa->akmp != WPA_KEY_MGMT_SAE) { 1544 wpa_printf(MSG_DEBUG, 1545 "SAE: No PMKSA cache entry found for " 1546 MACSTR, MAC2STR(sta->addr)); 1547 return WLAN_STATUS_INVALID_PMKID; 1548 } 1549 wpa_printf(MSG_DEBUG, "SAE: " MACSTR 1550 " using PMKSA caching", MAC2STR(sta->addr)); 1551 } else if (wpa_auth_uses_sae(sta->wpa_sm) && 1552 sta->auth_alg != WLAN_AUTH_SAE && 1553 !(sta->auth_alg == WLAN_AUTH_FT && 1554 wpa_auth_uses_ft_sae(sta->wpa_sm))) { 1555 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use " 1556 "SAE AKM after non-SAE auth_alg %u", 1557 MAC2STR(sta->addr), sta->auth_alg); 1558 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 1559 } 1560 #endif /* CONFIG_SAE */ 1561 1562 #ifdef CONFIG_IEEE80211N 1563 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) && 1564 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) { 1565 hostapd_logger(hapd, sta->addr, 1566 HOSTAPD_MODULE_IEEE80211, 1567 HOSTAPD_LEVEL_INFO, 1568 "Station tried to use TKIP with HT " 1569 "association"); 1570 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; 1571 } 1572 #endif /* CONFIG_IEEE80211N */ 1573 #ifdef CONFIG_HS20 1574 } else if (hapd->conf->osen) { 1575 if (elems.osen == NULL) { 1576 hostapd_logger( 1577 hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1578 HOSTAPD_LEVEL_INFO, 1579 "No HS 2.0 OSEN element in association request"); 1580 return WLAN_STATUS_INVALID_IE; 1581 } 1582 1583 wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association"); 1584 if (sta->wpa_sm == NULL) 1585 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 1586 sta->addr, NULL); 1587 if (sta->wpa_sm == NULL) { 1588 wpa_printf(MSG_WARNING, "Failed to initialize WPA " 1589 "state machine"); 1590 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1591 } 1592 if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm, 1593 elems.osen - 2, elems.osen_len + 2) < 0) 1594 return WLAN_STATUS_INVALID_IE; 1595 #endif /* CONFIG_HS20 */ 1596 } else 1597 wpa_auth_sta_no_wpa(sta->wpa_sm); 1598 1599 #ifdef CONFIG_P2P 1600 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len); 1601 #endif /* CONFIG_P2P */ 1602 1603 #ifdef CONFIG_HS20 1604 wpabuf_free(sta->hs20_ie); 1605 if (elems.hs20 && elems.hs20_len > 4) { 1606 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4, 1607 elems.hs20_len - 4); 1608 } else 1609 sta->hs20_ie = NULL; 1610 #endif /* CONFIG_HS20 */ 1611 1612 #ifdef CONFIG_FST 1613 wpabuf_free(sta->mb_ies); 1614 if (hapd->iface->fst) 1615 sta->mb_ies = mb_ies_by_info(&elems.mb_ies); 1616 else 1617 sta->mb_ies = NULL; 1618 #endif /* CONFIG_FST */ 1619 1620 return WLAN_STATUS_SUCCESS; 1621 } 1622 1623 1624 static void send_deauth(struct hostapd_data *hapd, const u8 *addr, 1625 u16 reason_code) 1626 { 1627 int send_len; 1628 struct ieee80211_mgmt reply; 1629 1630 os_memset(&reply, 0, sizeof(reply)); 1631 reply.frame_control = 1632 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); 1633 os_memcpy(reply.da, addr, ETH_ALEN); 1634 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN); 1635 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN); 1636 1637 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth); 1638 reply.u.deauth.reason_code = host_to_le16(reason_code); 1639 1640 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0) 1641 wpa_printf(MSG_INFO, "Failed to send deauth: %s", 1642 strerror(errno)); 1643 } 1644 1645 1646 static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta, 1647 u16 status_code, int reassoc, const u8 *ies, 1648 size_t ies_len) 1649 { 1650 int send_len; 1651 u8 buf[sizeof(struct ieee80211_mgmt) + 1024]; 1652 struct ieee80211_mgmt *reply; 1653 u8 *p; 1654 1655 os_memset(buf, 0, sizeof(buf)); 1656 reply = (struct ieee80211_mgmt *) buf; 1657 reply->frame_control = 1658 IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1659 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP : 1660 WLAN_FC_STYPE_ASSOC_RESP)); 1661 os_memcpy(reply->da, sta->addr, ETH_ALEN); 1662 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 1663 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN); 1664 1665 send_len = IEEE80211_HDRLEN; 1666 send_len += sizeof(reply->u.assoc_resp); 1667 reply->u.assoc_resp.capab_info = 1668 host_to_le16(hostapd_own_capab_info(hapd)); 1669 reply->u.assoc_resp.status_code = host_to_le16(status_code); 1670 reply->u.assoc_resp.aid = host_to_le16(sta->aid | BIT(14) | BIT(15)); 1671 /* Supported rates */ 1672 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable); 1673 /* Extended supported rates */ 1674 p = hostapd_eid_ext_supp_rates(hapd, p); 1675 1676 #ifdef CONFIG_IEEE80211R 1677 if (status_code == WLAN_STATUS_SUCCESS) { 1678 /* IEEE 802.11r: Mobility Domain Information, Fast BSS 1679 * Transition Information, RSN, [RIC Response] */ 1680 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p, 1681 buf + sizeof(buf) - p, 1682 sta->auth_alg, ies, ies_len); 1683 } 1684 #endif /* CONFIG_IEEE80211R */ 1685 1686 #ifdef CONFIG_IEEE80211W 1687 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) 1688 p = hostapd_eid_assoc_comeback_time(hapd, sta, p); 1689 #endif /* CONFIG_IEEE80211W */ 1690 1691 #ifdef CONFIG_IEEE80211N 1692 p = hostapd_eid_ht_capabilities(hapd, p); 1693 p = hostapd_eid_ht_operation(hapd, p); 1694 #endif /* CONFIG_IEEE80211N */ 1695 1696 #ifdef CONFIG_IEEE80211AC 1697 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) { 1698 p = hostapd_eid_vht_capabilities(hapd, p); 1699 p = hostapd_eid_vht_operation(hapd, p); 1700 } 1701 #endif /* CONFIG_IEEE80211AC */ 1702 1703 p = hostapd_eid_ext_capab(hapd, p); 1704 p = hostapd_eid_bss_max_idle_period(hapd, p); 1705 if (sta->qos_map_enabled) 1706 p = hostapd_eid_qos_map_set(hapd, p); 1707 1708 #ifdef CONFIG_FST 1709 if (hapd->iface->fst_ies) { 1710 os_memcpy(p, wpabuf_head(hapd->iface->fst_ies), 1711 wpabuf_len(hapd->iface->fst_ies)); 1712 p += wpabuf_len(hapd->iface->fst_ies); 1713 } 1714 #endif /* CONFIG_FST */ 1715 1716 #ifdef CONFIG_IEEE80211AC 1717 if (hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT)) 1718 p = hostapd_eid_vendor_vht(hapd, p); 1719 #endif /* CONFIG_IEEE80211AC */ 1720 1721 if (sta->flags & WLAN_STA_WMM) 1722 p = hostapd_eid_wmm(hapd, p); 1723 1724 #ifdef CONFIG_WPS 1725 if ((sta->flags & WLAN_STA_WPS) || 1726 ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) { 1727 struct wpabuf *wps = wps_build_assoc_resp_ie(); 1728 if (wps) { 1729 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps)); 1730 p += wpabuf_len(wps); 1731 wpabuf_free(wps); 1732 } 1733 } 1734 #endif /* CONFIG_WPS */ 1735 1736 #ifdef CONFIG_P2P 1737 if (sta->p2p_ie) { 1738 struct wpabuf *p2p_resp_ie; 1739 enum p2p_status_code status; 1740 switch (status_code) { 1741 case WLAN_STATUS_SUCCESS: 1742 status = P2P_SC_SUCCESS; 1743 break; 1744 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA: 1745 status = P2P_SC_FAIL_LIMIT_REACHED; 1746 break; 1747 default: 1748 status = P2P_SC_FAIL_INVALID_PARAMS; 1749 break; 1750 } 1751 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status); 1752 if (p2p_resp_ie) { 1753 os_memcpy(p, wpabuf_head(p2p_resp_ie), 1754 wpabuf_len(p2p_resp_ie)); 1755 p += wpabuf_len(p2p_resp_ie); 1756 wpabuf_free(p2p_resp_ie); 1757 } 1758 } 1759 #endif /* CONFIG_P2P */ 1760 1761 #ifdef CONFIG_P2P_MANAGER 1762 if (hapd->conf->p2p & P2P_MANAGE) 1763 p = hostapd_eid_p2p_manage(hapd, p); 1764 #endif /* CONFIG_P2P_MANAGER */ 1765 1766 send_len += p - reply->u.assoc_resp.variable; 1767 1768 if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0) 1769 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s", 1770 strerror(errno)); 1771 } 1772 1773 1774 static void handle_assoc(struct hostapd_data *hapd, 1775 const struct ieee80211_mgmt *mgmt, size_t len, 1776 int reassoc) 1777 { 1778 u16 capab_info, listen_interval, seq_ctrl, fc; 1779 u16 resp = WLAN_STATUS_SUCCESS; 1780 const u8 *pos; 1781 int left, i; 1782 struct sta_info *sta; 1783 1784 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) : 1785 sizeof(mgmt->u.assoc_req))) { 1786 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)", 1787 reassoc, (unsigned long) len); 1788 return; 1789 } 1790 1791 #ifdef CONFIG_TESTING_OPTIONS 1792 if (reassoc) { 1793 if (hapd->iconf->ignore_reassoc_probability > 0.0 && 1794 drand48() < hapd->iconf->ignore_reassoc_probability) { 1795 wpa_printf(MSG_INFO, 1796 "TESTING: ignoring reassoc request from " 1797 MACSTR, MAC2STR(mgmt->sa)); 1798 return; 1799 } 1800 } else { 1801 if (hapd->iconf->ignore_assoc_probability > 0.0 && 1802 drand48() < hapd->iconf->ignore_assoc_probability) { 1803 wpa_printf(MSG_INFO, 1804 "TESTING: ignoring assoc request from " 1805 MACSTR, MAC2STR(mgmt->sa)); 1806 return; 1807 } 1808 } 1809 #endif /* CONFIG_TESTING_OPTIONS */ 1810 1811 fc = le_to_host16(mgmt->frame_control); 1812 seq_ctrl = le_to_host16(mgmt->seq_ctrl); 1813 1814 if (reassoc) { 1815 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info); 1816 listen_interval = le_to_host16( 1817 mgmt->u.reassoc_req.listen_interval); 1818 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR 1819 " capab_info=0x%02x listen_interval=%d current_ap=" 1820 MACSTR " seq_ctrl=0x%x%s", 1821 MAC2STR(mgmt->sa), capab_info, listen_interval, 1822 MAC2STR(mgmt->u.reassoc_req.current_ap), 1823 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : ""); 1824 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req)); 1825 pos = mgmt->u.reassoc_req.variable; 1826 } else { 1827 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info); 1828 listen_interval = le_to_host16( 1829 mgmt->u.assoc_req.listen_interval); 1830 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR 1831 " capab_info=0x%02x listen_interval=%d " 1832 "seq_ctrl=0x%x%s", 1833 MAC2STR(mgmt->sa), capab_info, listen_interval, 1834 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : ""); 1835 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req)); 1836 pos = mgmt->u.assoc_req.variable; 1837 } 1838 1839 sta = ap_get_sta(hapd, mgmt->sa); 1840 #ifdef CONFIG_IEEE80211R 1841 if (sta && sta->auth_alg == WLAN_AUTH_FT && 1842 (sta->flags & WLAN_STA_AUTH) == 0) { 1843 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate " 1844 "prior to authentication since it is using " 1845 "over-the-DS FT", MAC2STR(mgmt->sa)); 1846 } else 1847 #endif /* CONFIG_IEEE80211R */ 1848 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) { 1849 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1850 HOSTAPD_LEVEL_INFO, "Station tried to " 1851 "associate before authentication " 1852 "(aid=%d flags=0x%x)", 1853 sta ? sta->aid : -1, 1854 sta ? sta->flags : 0); 1855 send_deauth(hapd, mgmt->sa, 1856 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA); 1857 return; 1858 } 1859 1860 if ((fc & WLAN_FC_RETRY) && 1861 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ && 1862 sta->last_seq_ctrl == seq_ctrl && 1863 sta->last_subtype == reassoc ? WLAN_FC_STYPE_REASSOC_REQ : 1864 WLAN_FC_STYPE_ASSOC_REQ) { 1865 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1866 HOSTAPD_LEVEL_DEBUG, 1867 "Drop repeated association frame seq_ctrl=0x%x", 1868 seq_ctrl); 1869 return; 1870 } 1871 sta->last_seq_ctrl = seq_ctrl; 1872 sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ : 1873 WLAN_FC_STYPE_ASSOC_REQ; 1874 1875 if (hapd->tkip_countermeasures) { 1876 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 1877 goto fail; 1878 } 1879 1880 if (listen_interval > hapd->conf->max_listen_interval) { 1881 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1882 HOSTAPD_LEVEL_DEBUG, 1883 "Too large Listen Interval (%d)", 1884 listen_interval); 1885 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE; 1886 goto fail; 1887 } 1888 1889 /* followed by SSID and Supported rates; and HT capabilities if 802.11n 1890 * is used */ 1891 resp = check_assoc_ies(hapd, sta, pos, left, reassoc); 1892 if (resp != WLAN_STATUS_SUCCESS) 1893 goto fail; 1894 1895 if (hostapd_get_aid(hapd, sta) < 0) { 1896 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1897 HOSTAPD_LEVEL_INFO, "No room for more AIDs"); 1898 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 1899 goto fail; 1900 } 1901 1902 sta->capability = capab_info; 1903 sta->listen_interval = listen_interval; 1904 1905 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) 1906 sta->flags |= WLAN_STA_NONERP; 1907 for (i = 0; i < sta->supported_rates_len; i++) { 1908 if ((sta->supported_rates[i] & 0x7f) > 22) { 1909 sta->flags &= ~WLAN_STA_NONERP; 1910 break; 1911 } 1912 } 1913 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) { 1914 sta->nonerp_set = 1; 1915 hapd->iface->num_sta_non_erp++; 1916 if (hapd->iface->num_sta_non_erp == 1) 1917 ieee802_11_set_beacons(hapd->iface); 1918 } 1919 1920 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) && 1921 !sta->no_short_slot_time_set) { 1922 sta->no_short_slot_time_set = 1; 1923 hapd->iface->num_sta_no_short_slot_time++; 1924 if (hapd->iface->current_mode->mode == 1925 HOSTAPD_MODE_IEEE80211G && 1926 hapd->iface->num_sta_no_short_slot_time == 1) 1927 ieee802_11_set_beacons(hapd->iface); 1928 } 1929 1930 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) 1931 sta->flags |= WLAN_STA_SHORT_PREAMBLE; 1932 else 1933 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; 1934 1935 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && 1936 !sta->no_short_preamble_set) { 1937 sta->no_short_preamble_set = 1; 1938 hapd->iface->num_sta_no_short_preamble++; 1939 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G 1940 && hapd->iface->num_sta_no_short_preamble == 1) 1941 ieee802_11_set_beacons(hapd->iface); 1942 } 1943 1944 #ifdef CONFIG_IEEE80211N 1945 update_ht_state(hapd, sta); 1946 #endif /* CONFIG_IEEE80211N */ 1947 1948 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1949 HOSTAPD_LEVEL_DEBUG, 1950 "association OK (aid %d)", sta->aid); 1951 /* Station will be marked associated, after it acknowledges AssocResp 1952 */ 1953 sta->flags |= WLAN_STA_ASSOC_REQ_OK; 1954 1955 #ifdef CONFIG_IEEE80211W 1956 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) { 1957 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out " 1958 "SA Query procedure", reassoc ? "re" : ""); 1959 /* TODO: Send a protected Disassociate frame to the STA using 1960 * the old key and Reason Code "Previous Authentication no 1961 * longer valid". Make sure this is only sent protected since 1962 * unprotected frame would be received by the STA that is now 1963 * trying to associate. 1964 */ 1965 } 1966 #endif /* CONFIG_IEEE80211W */ 1967 1968 /* Make sure that the previously registered inactivity timer will not 1969 * remove the STA immediately. */ 1970 sta->timeout_next = STA_NULLFUNC; 1971 1972 fail: 1973 send_assoc_resp(hapd, sta, resp, reassoc, pos, left); 1974 } 1975 1976 1977 static void handle_disassoc(struct hostapd_data *hapd, 1978 const struct ieee80211_mgmt *mgmt, size_t len) 1979 { 1980 struct sta_info *sta; 1981 1982 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) { 1983 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)", 1984 (unsigned long) len); 1985 return; 1986 } 1987 1988 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d", 1989 MAC2STR(mgmt->sa), 1990 le_to_host16(mgmt->u.disassoc.reason_code)); 1991 1992 sta = ap_get_sta(hapd, mgmt->sa); 1993 if (sta == NULL) { 1994 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated", 1995 MAC2STR(mgmt->sa)); 1996 return; 1997 } 1998 1999 ap_sta_set_authorized(hapd, sta, 0); 2000 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ; 2001 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK); 2002 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC); 2003 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 2004 HOSTAPD_LEVEL_INFO, "disassociated"); 2005 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 2006 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 2007 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA 2008 * authenticated. */ 2009 accounting_sta_stop(hapd, sta); 2010 ieee802_1x_free_station(sta); 2011 if (sta->ipaddr) 2012 hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr); 2013 ap_sta_ip6addr_del(hapd, sta); 2014 hostapd_drv_sta_remove(hapd, sta->addr); 2015 2016 if (sta->timeout_next == STA_NULLFUNC || 2017 sta->timeout_next == STA_DISASSOC) { 2018 sta->timeout_next = STA_DEAUTH; 2019 eloop_cancel_timeout(ap_handle_timer, hapd, sta); 2020 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer, 2021 hapd, sta); 2022 } 2023 2024 mlme_disassociate_indication( 2025 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code)); 2026 } 2027 2028 2029 static void handle_deauth(struct hostapd_data *hapd, 2030 const struct ieee80211_mgmt *mgmt, size_t len) 2031 { 2032 struct sta_info *sta; 2033 2034 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) { 2035 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short " 2036 "payload (len=%lu)", (unsigned long) len); 2037 return; 2038 } 2039 2040 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR 2041 " reason_code=%d", 2042 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code)); 2043 2044 sta = ap_get_sta(hapd, mgmt->sa); 2045 if (sta == NULL) { 2046 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying " 2047 "to deauthenticate, but it is not authenticated", 2048 MAC2STR(mgmt->sa)); 2049 return; 2050 } 2051 2052 ap_sta_set_authorized(hapd, sta, 0); 2053 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ; 2054 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | 2055 WLAN_STA_ASSOC_REQ_OK); 2056 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH); 2057 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 2058 HOSTAPD_LEVEL_DEBUG, "deauthenticated"); 2059 mlme_deauthenticate_indication( 2060 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code)); 2061 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 2062 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 2063 ap_free_sta(hapd, sta); 2064 } 2065 2066 2067 static void handle_beacon(struct hostapd_data *hapd, 2068 const struct ieee80211_mgmt *mgmt, size_t len, 2069 struct hostapd_frame_info *fi) 2070 { 2071 struct ieee802_11_elems elems; 2072 2073 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) { 2074 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)", 2075 (unsigned long) len); 2076 return; 2077 } 2078 2079 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable, 2080 len - (IEEE80211_HDRLEN + 2081 sizeof(mgmt->u.beacon)), &elems, 2082 0); 2083 2084 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi); 2085 } 2086 2087 2088 #ifdef CONFIG_IEEE80211W 2089 2090 static int hostapd_sa_query_action(struct hostapd_data *hapd, 2091 const struct ieee80211_mgmt *mgmt, 2092 size_t len) 2093 { 2094 const u8 *end; 2095 2096 end = mgmt->u.action.u.sa_query_resp.trans_id + 2097 WLAN_SA_QUERY_TR_ID_LEN; 2098 if (((u8 *) mgmt) + len < end) { 2099 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action " 2100 "frame (len=%lu)", (unsigned long) len); 2101 return 0; 2102 } 2103 2104 ieee802_11_sa_query_action(hapd, mgmt->sa, 2105 mgmt->u.action.u.sa_query_resp.action, 2106 mgmt->u.action.u.sa_query_resp.trans_id); 2107 return 1; 2108 } 2109 2110 2111 static int robust_action_frame(u8 category) 2112 { 2113 return category != WLAN_ACTION_PUBLIC && 2114 category != WLAN_ACTION_HT; 2115 } 2116 #endif /* CONFIG_IEEE80211W */ 2117 2118 2119 static int handle_action(struct hostapd_data *hapd, 2120 const struct ieee80211_mgmt *mgmt, size_t len) 2121 { 2122 struct sta_info *sta; 2123 sta = ap_get_sta(hapd, mgmt->sa); 2124 2125 if (len < IEEE80211_HDRLEN + 1) { 2126 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 2127 HOSTAPD_LEVEL_DEBUG, 2128 "handle_action - too short payload (len=%lu)", 2129 (unsigned long) len); 2130 return 0; 2131 } 2132 2133 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC && 2134 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) { 2135 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action " 2136 "frame (category=%u) from unassociated STA " MACSTR, 2137 MAC2STR(mgmt->sa), mgmt->u.action.category); 2138 return 0; 2139 } 2140 2141 #ifdef CONFIG_IEEE80211W 2142 if (sta && (sta->flags & WLAN_STA_MFP) && 2143 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) && 2144 robust_action_frame(mgmt->u.action.category)) { 2145 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 2146 HOSTAPD_LEVEL_DEBUG, 2147 "Dropped unprotected Robust Action frame from " 2148 "an MFP STA"); 2149 return 0; 2150 } 2151 #endif /* CONFIG_IEEE80211W */ 2152 2153 if (sta) { 2154 u16 fc = le_to_host16(mgmt->frame_control); 2155 u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl); 2156 2157 if ((fc & WLAN_FC_RETRY) && 2158 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ && 2159 sta->last_seq_ctrl == seq_ctrl && 2160 sta->last_subtype == WLAN_FC_STYPE_ACTION) { 2161 hostapd_logger(hapd, sta->addr, 2162 HOSTAPD_MODULE_IEEE80211, 2163 HOSTAPD_LEVEL_DEBUG, 2164 "Drop repeated action frame seq_ctrl=0x%x", 2165 seq_ctrl); 2166 return 1; 2167 } 2168 2169 sta->last_seq_ctrl = seq_ctrl; 2170 sta->last_subtype = WLAN_FC_STYPE_ACTION; 2171 } 2172 2173 switch (mgmt->u.action.category) { 2174 #ifdef CONFIG_IEEE80211R 2175 case WLAN_ACTION_FT: 2176 if (!sta || 2177 wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action, 2178 len - IEEE80211_HDRLEN)) 2179 break; 2180 return 1; 2181 #endif /* CONFIG_IEEE80211R */ 2182 case WLAN_ACTION_WMM: 2183 hostapd_wmm_action(hapd, mgmt, len); 2184 return 1; 2185 #ifdef CONFIG_IEEE80211W 2186 case WLAN_ACTION_SA_QUERY: 2187 return hostapd_sa_query_action(hapd, mgmt, len); 2188 #endif /* CONFIG_IEEE80211W */ 2189 #ifdef CONFIG_WNM 2190 case WLAN_ACTION_WNM: 2191 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len); 2192 return 1; 2193 #endif /* CONFIG_WNM */ 2194 #ifdef CONFIG_FST 2195 case WLAN_ACTION_FST: 2196 if (hapd->iface->fst) 2197 fst_rx_action(hapd->iface->fst, mgmt, len); 2198 else 2199 wpa_printf(MSG_DEBUG, 2200 "FST: Ignore FST Action frame - no FST attached"); 2201 return 1; 2202 #endif /* CONFIG_FST */ 2203 case WLAN_ACTION_PUBLIC: 2204 case WLAN_ACTION_PROTECTED_DUAL: 2205 #ifdef CONFIG_IEEE80211N 2206 if (len >= IEEE80211_HDRLEN + 2 && 2207 mgmt->u.action.u.public_action.action == 2208 WLAN_PA_20_40_BSS_COEX) { 2209 wpa_printf(MSG_DEBUG, 2210 "HT20/40 coex mgmt frame received from STA " 2211 MACSTR, MAC2STR(mgmt->sa)); 2212 hostapd_2040_coex_action(hapd, mgmt, len); 2213 } 2214 #endif /* CONFIG_IEEE80211N */ 2215 if (hapd->public_action_cb) { 2216 hapd->public_action_cb(hapd->public_action_cb_ctx, 2217 (u8 *) mgmt, len, 2218 hapd->iface->freq); 2219 } 2220 if (hapd->public_action_cb2) { 2221 hapd->public_action_cb2(hapd->public_action_cb2_ctx, 2222 (u8 *) mgmt, len, 2223 hapd->iface->freq); 2224 } 2225 if (hapd->public_action_cb || hapd->public_action_cb2) 2226 return 1; 2227 break; 2228 case WLAN_ACTION_VENDOR_SPECIFIC: 2229 if (hapd->vendor_action_cb) { 2230 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx, 2231 (u8 *) mgmt, len, 2232 hapd->iface->freq) == 0) 2233 return 1; 2234 } 2235 break; 2236 } 2237 2238 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 2239 HOSTAPD_LEVEL_DEBUG, 2240 "handle_action - unknown action category %d or invalid " 2241 "frame", 2242 mgmt->u.action.category); 2243 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) && 2244 !(mgmt->sa[0] & 0x01)) { 2245 struct ieee80211_mgmt *resp; 2246 2247 /* 2248 * IEEE 802.11-REVma/D9.0 - 7.3.1.11 2249 * Return the Action frame to the source without change 2250 * except that MSB of the Category set to 1. 2251 */ 2252 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action " 2253 "frame back to sender"); 2254 resp = os_malloc(len); 2255 if (resp == NULL) 2256 return 0; 2257 os_memcpy(resp, mgmt, len); 2258 os_memcpy(resp->da, resp->sa, ETH_ALEN); 2259 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); 2260 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); 2261 resp->u.action.category |= 0x80; 2262 2263 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) { 2264 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send " 2265 "Action frame"); 2266 } 2267 os_free(resp); 2268 } 2269 2270 return 1; 2271 } 2272 2273 2274 /** 2275 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames 2276 * @hapd: hostapd BSS data structure (the BSS to which the management frame was 2277 * sent to) 2278 * @buf: management frame data (starting from IEEE 802.11 header) 2279 * @len: length of frame data in octets 2280 * @fi: meta data about received frame (signal level, etc.) 2281 * 2282 * Process all incoming IEEE 802.11 management frames. This will be called for 2283 * each frame received from the kernel driver through wlan#ap interface. In 2284 * addition, it can be called to re-inserted pending frames (e.g., when using 2285 * external RADIUS server as an MAC ACL). 2286 */ 2287 int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len, 2288 struct hostapd_frame_info *fi) 2289 { 2290 struct ieee80211_mgmt *mgmt; 2291 int broadcast; 2292 u16 fc, stype; 2293 int ret = 0; 2294 2295 if (len < 24) 2296 return 0; 2297 2298 mgmt = (struct ieee80211_mgmt *) buf; 2299 fc = le_to_host16(mgmt->frame_control); 2300 stype = WLAN_FC_GET_STYPE(fc); 2301 2302 if (stype == WLAN_FC_STYPE_BEACON) { 2303 handle_beacon(hapd, mgmt, len, fi); 2304 return 1; 2305 } 2306 2307 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff && 2308 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff && 2309 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff; 2310 2311 if (!broadcast && 2312 #ifdef CONFIG_P2P 2313 /* Invitation responses can be sent with the peer MAC as BSSID */ 2314 !((hapd->conf->p2p & P2P_GROUP_OWNER) && 2315 stype == WLAN_FC_STYPE_ACTION) && 2316 #endif /* CONFIG_P2P */ 2317 #ifdef CONFIG_MESH 2318 !(hapd->conf->mesh & MESH_ENABLED) && 2319 #endif /* CONFIG_MESH */ 2320 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) { 2321 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address", 2322 MAC2STR(mgmt->bssid)); 2323 return 0; 2324 } 2325 2326 2327 if (stype == WLAN_FC_STYPE_PROBE_REQ) { 2328 handle_probe_req(hapd, mgmt, len, fi->ssi_signal); 2329 return 1; 2330 } 2331 2332 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) { 2333 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 2334 HOSTAPD_LEVEL_DEBUG, 2335 "MGMT: DA=" MACSTR " not our address", 2336 MAC2STR(mgmt->da)); 2337 return 0; 2338 } 2339 2340 if (hapd->iconf->track_sta_max_num) 2341 sta_track_add(hapd->iface, mgmt->sa); 2342 2343 switch (stype) { 2344 case WLAN_FC_STYPE_AUTH: 2345 wpa_printf(MSG_DEBUG, "mgmt::auth"); 2346 handle_auth(hapd, mgmt, len); 2347 ret = 1; 2348 break; 2349 case WLAN_FC_STYPE_ASSOC_REQ: 2350 wpa_printf(MSG_DEBUG, "mgmt::assoc_req"); 2351 handle_assoc(hapd, mgmt, len, 0); 2352 ret = 1; 2353 break; 2354 case WLAN_FC_STYPE_REASSOC_REQ: 2355 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req"); 2356 handle_assoc(hapd, mgmt, len, 1); 2357 ret = 1; 2358 break; 2359 case WLAN_FC_STYPE_DISASSOC: 2360 wpa_printf(MSG_DEBUG, "mgmt::disassoc"); 2361 handle_disassoc(hapd, mgmt, len); 2362 ret = 1; 2363 break; 2364 case WLAN_FC_STYPE_DEAUTH: 2365 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth"); 2366 handle_deauth(hapd, mgmt, len); 2367 ret = 1; 2368 break; 2369 case WLAN_FC_STYPE_ACTION: 2370 wpa_printf(MSG_DEBUG, "mgmt::action"); 2371 ret = handle_action(hapd, mgmt, len); 2372 break; 2373 default: 2374 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 2375 HOSTAPD_LEVEL_DEBUG, 2376 "unknown mgmt frame subtype %d", stype); 2377 break; 2378 } 2379 2380 return ret; 2381 } 2382 2383 2384 static void handle_auth_cb(struct hostapd_data *hapd, 2385 const struct ieee80211_mgmt *mgmt, 2386 size_t len, int ok) 2387 { 2388 u16 auth_alg, auth_transaction, status_code; 2389 struct sta_info *sta; 2390 2391 if (!ok) { 2392 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 2393 HOSTAPD_LEVEL_NOTICE, 2394 "did not acknowledge authentication response"); 2395 return; 2396 } 2397 2398 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 2399 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)", 2400 (unsigned long) len); 2401 return; 2402 } 2403 2404 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 2405 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 2406 status_code = le_to_host16(mgmt->u.auth.status_code); 2407 2408 sta = ap_get_sta(hapd, mgmt->da); 2409 if (!sta) { 2410 wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found", 2411 MAC2STR(mgmt->da)); 2412 return; 2413 } 2414 2415 if (status_code == WLAN_STATUS_SUCCESS && 2416 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || 2417 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { 2418 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 2419 HOSTAPD_LEVEL_INFO, "authenticated"); 2420 sta->flags |= WLAN_STA_AUTH; 2421 } 2422 } 2423 2424 2425 static void hostapd_set_wds_encryption(struct hostapd_data *hapd, 2426 struct sta_info *sta, 2427 char *ifname_wds) 2428 { 2429 int i; 2430 struct hostapd_ssid *ssid = &hapd->conf->ssid; 2431 2432 if (hapd->conf->ieee802_1x || hapd->conf->wpa) 2433 return; 2434 2435 for (i = 0; i < 4; i++) { 2436 if (ssid->wep.key[i] && 2437 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i, 2438 i == ssid->wep.idx, NULL, 0, 2439 ssid->wep.key[i], ssid->wep.len[i])) { 2440 wpa_printf(MSG_WARNING, 2441 "Could not set WEP keys for WDS interface; %s", 2442 ifname_wds); 2443 break; 2444 } 2445 } 2446 } 2447 2448 2449 static void handle_assoc_cb(struct hostapd_data *hapd, 2450 const struct ieee80211_mgmt *mgmt, 2451 size_t len, int reassoc, int ok) 2452 { 2453 u16 status; 2454 struct sta_info *sta; 2455 int new_assoc = 1; 2456 struct ieee80211_ht_capabilities ht_cap; 2457 struct ieee80211_vht_capabilities vht_cap; 2458 2459 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) : 2460 sizeof(mgmt->u.assoc_resp))) { 2461 wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)", 2462 reassoc, (unsigned long) len); 2463 return; 2464 } 2465 2466 sta = ap_get_sta(hapd, mgmt->da); 2467 if (!sta) { 2468 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found", 2469 MAC2STR(mgmt->da)); 2470 return; 2471 } 2472 2473 if (!ok) { 2474 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 2475 HOSTAPD_LEVEL_DEBUG, 2476 "did not acknowledge association response"); 2477 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK; 2478 return; 2479 } 2480 2481 if (reassoc) 2482 status = le_to_host16(mgmt->u.reassoc_resp.status_code); 2483 else 2484 status = le_to_host16(mgmt->u.assoc_resp.status_code); 2485 2486 if (status != WLAN_STATUS_SUCCESS) 2487 return; 2488 2489 /* Stop previous accounting session, if one is started, and allocate 2490 * new session id for the new session. */ 2491 accounting_sta_stop(hapd, sta); 2492 2493 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 2494 HOSTAPD_LEVEL_INFO, 2495 "associated (aid %d)", 2496 sta->aid); 2497 2498 if (sta->flags & WLAN_STA_ASSOC) 2499 new_assoc = 0; 2500 sta->flags |= WLAN_STA_ASSOC; 2501 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE; 2502 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) || 2503 sta->auth_alg == WLAN_AUTH_FT) { 2504 /* 2505 * Open, static WEP, or FT protocol; no separate authorization 2506 * step. 2507 */ 2508 ap_sta_set_authorized(hapd, sta, 1); 2509 } 2510 2511 if (reassoc) 2512 mlme_reassociate_indication(hapd, sta); 2513 else 2514 mlme_associate_indication(hapd, sta); 2515 2516 #ifdef CONFIG_IEEE80211W 2517 sta->sa_query_timed_out = 0; 2518 #endif /* CONFIG_IEEE80211W */ 2519 2520 /* 2521 * Remove the STA entry in order to make sure the STA PS state gets 2522 * cleared and configuration gets updated in case of reassociation back 2523 * to the same AP. 2524 */ 2525 hostapd_drv_sta_remove(hapd, sta->addr); 2526 2527 #ifdef CONFIG_IEEE80211N 2528 if (sta->flags & WLAN_STA_HT) 2529 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap); 2530 #endif /* CONFIG_IEEE80211N */ 2531 #ifdef CONFIG_IEEE80211AC 2532 if (sta->flags & WLAN_STA_VHT) 2533 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap); 2534 #endif /* CONFIG_IEEE80211AC */ 2535 2536 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability, 2537 sta->supported_rates, sta->supported_rates_len, 2538 sta->listen_interval, 2539 sta->flags & WLAN_STA_HT ? &ht_cap : NULL, 2540 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL, 2541 sta->flags, sta->qosinfo, sta->vht_opmode)) { 2542 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 2543 HOSTAPD_LEVEL_NOTICE, 2544 "Could not add STA to kernel driver"); 2545 2546 ap_sta_disconnect(hapd, sta, sta->addr, 2547 WLAN_REASON_DISASSOC_AP_BUSY); 2548 2549 return; 2550 } 2551 2552 if (sta->flags & WLAN_STA_WDS) { 2553 int ret; 2554 char ifname_wds[IFNAMSIZ + 1]; 2555 2556 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr, 2557 sta->aid, 1); 2558 if (!ret) 2559 hostapd_set_wds_encryption(hapd, sta, ifname_wds); 2560 } 2561 2562 if (sta->eapol_sm == NULL) { 2563 /* 2564 * This STA does not use RADIUS server for EAP authentication, 2565 * so bind it to the selected VLAN interface now, since the 2566 * interface selection is not going to change anymore. 2567 */ 2568 if (ap_sta_bind_vlan(hapd, sta) < 0) 2569 return; 2570 } else if (sta->vlan_id) { 2571 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */ 2572 if (ap_sta_bind_vlan(hapd, sta) < 0) 2573 return; 2574 } 2575 2576 hostapd_set_sta_flags(hapd, sta); 2577 2578 if (sta->auth_alg == WLAN_AUTH_FT) 2579 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); 2580 else 2581 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); 2582 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc); 2583 2584 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); 2585 } 2586 2587 2588 static void handle_deauth_cb(struct hostapd_data *hapd, 2589 const struct ieee80211_mgmt *mgmt, 2590 size_t len, int ok) 2591 { 2592 struct sta_info *sta; 2593 if (mgmt->da[0] & 0x01) 2594 return; 2595 sta = ap_get_sta(hapd, mgmt->da); 2596 if (!sta) { 2597 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR 2598 " not found", MAC2STR(mgmt->da)); 2599 return; 2600 } 2601 if (ok) 2602 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth", 2603 MAC2STR(sta->addr)); 2604 else 2605 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2606 "deauth", MAC2STR(sta->addr)); 2607 2608 ap_sta_deauth_cb(hapd, sta); 2609 } 2610 2611 2612 static void handle_disassoc_cb(struct hostapd_data *hapd, 2613 const struct ieee80211_mgmt *mgmt, 2614 size_t len, int ok) 2615 { 2616 struct sta_info *sta; 2617 if (mgmt->da[0] & 0x01) 2618 return; 2619 sta = ap_get_sta(hapd, mgmt->da); 2620 if (!sta) { 2621 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR 2622 " not found", MAC2STR(mgmt->da)); 2623 return; 2624 } 2625 if (ok) 2626 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc", 2627 MAC2STR(sta->addr)); 2628 else 2629 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " 2630 "disassoc", MAC2STR(sta->addr)); 2631 2632 ap_sta_disassoc_cb(hapd, sta); 2633 } 2634 2635 2636 /** 2637 * ieee802_11_mgmt_cb - Process management frame TX status callback 2638 * @hapd: hostapd BSS data structure (the BSS from which the management frame 2639 * was sent from) 2640 * @buf: management frame data (starting from IEEE 802.11 header) 2641 * @len: length of frame data in octets 2642 * @stype: management frame subtype from frame control field 2643 * @ok: Whether the frame was ACK'ed 2644 */ 2645 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len, 2646 u16 stype, int ok) 2647 { 2648 const struct ieee80211_mgmt *mgmt; 2649 mgmt = (const struct ieee80211_mgmt *) buf; 2650 2651 #ifdef CONFIG_TESTING_OPTIONS 2652 if (hapd->ext_mgmt_frame_handling) { 2653 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d", 2654 stype, ok); 2655 return; 2656 } 2657 #endif /* CONFIG_TESTING_OPTIONS */ 2658 2659 switch (stype) { 2660 case WLAN_FC_STYPE_AUTH: 2661 wpa_printf(MSG_DEBUG, "mgmt::auth cb"); 2662 handle_auth_cb(hapd, mgmt, len, ok); 2663 break; 2664 case WLAN_FC_STYPE_ASSOC_RESP: 2665 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb"); 2666 handle_assoc_cb(hapd, mgmt, len, 0, ok); 2667 break; 2668 case WLAN_FC_STYPE_REASSOC_RESP: 2669 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb"); 2670 handle_assoc_cb(hapd, mgmt, len, 1, ok); 2671 break; 2672 case WLAN_FC_STYPE_PROBE_RESP: 2673 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb"); 2674 break; 2675 case WLAN_FC_STYPE_DEAUTH: 2676 wpa_printf(MSG_DEBUG, "mgmt::deauth cb"); 2677 handle_deauth_cb(hapd, mgmt, len, ok); 2678 break; 2679 case WLAN_FC_STYPE_DISASSOC: 2680 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb"); 2681 handle_disassoc_cb(hapd, mgmt, len, ok); 2682 break; 2683 case WLAN_FC_STYPE_ACTION: 2684 wpa_printf(MSG_DEBUG, "mgmt::action cb"); 2685 break; 2686 default: 2687 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype); 2688 break; 2689 } 2690 } 2691 2692 2693 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 2694 { 2695 /* TODO */ 2696 return 0; 2697 } 2698 2699 2700 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 2701 char *buf, size_t buflen) 2702 { 2703 /* TODO */ 2704 return 0; 2705 } 2706 2707 2708 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr, 2709 const u8 *buf, size_t len, int ack) 2710 { 2711 struct sta_info *sta; 2712 struct hostapd_iface *iface = hapd->iface; 2713 2714 sta = ap_get_sta(hapd, addr); 2715 if (sta == NULL && iface->num_bss > 1) { 2716 size_t j; 2717 for (j = 0; j < iface->num_bss; j++) { 2718 hapd = iface->bss[j]; 2719 sta = ap_get_sta(hapd, addr); 2720 if (sta) 2721 break; 2722 } 2723 } 2724 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) 2725 return; 2726 if (sta->flags & WLAN_STA_PENDING_POLL) { 2727 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending " 2728 "activity poll", MAC2STR(sta->addr), 2729 ack ? "ACKed" : "did not ACK"); 2730 if (ack) 2731 sta->flags &= ~WLAN_STA_PENDING_POLL; 2732 } 2733 2734 ieee802_1x_tx_status(hapd, sta, buf, len, ack); 2735 } 2736 2737 2738 void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst, 2739 const u8 *data, size_t len, int ack) 2740 { 2741 struct sta_info *sta; 2742 struct hostapd_iface *iface = hapd->iface; 2743 2744 sta = ap_get_sta(hapd, dst); 2745 if (sta == NULL && iface->num_bss > 1) { 2746 size_t j; 2747 for (j = 0; j < iface->num_bss; j++) { 2748 hapd = iface->bss[j]; 2749 sta = ap_get_sta(hapd, dst); 2750 if (sta) 2751 break; 2752 } 2753 } 2754 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 2755 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA " 2756 MACSTR " that is not currently associated", 2757 MAC2STR(dst)); 2758 return; 2759 } 2760 2761 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack); 2762 } 2763 2764 2765 void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr) 2766 { 2767 struct sta_info *sta; 2768 struct hostapd_iface *iface = hapd->iface; 2769 2770 sta = ap_get_sta(hapd, addr); 2771 if (sta == NULL && iface->num_bss > 1) { 2772 size_t j; 2773 for (j = 0; j < iface->num_bss; j++) { 2774 hapd = iface->bss[j]; 2775 sta = ap_get_sta(hapd, addr); 2776 if (sta) 2777 break; 2778 } 2779 } 2780 if (sta == NULL) 2781 return; 2782 if (!(sta->flags & WLAN_STA_PENDING_POLL)) 2783 return; 2784 2785 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending " 2786 "activity poll", MAC2STR(sta->addr)); 2787 sta->flags &= ~WLAN_STA_PENDING_POLL; 2788 } 2789 2790 2791 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src, 2792 int wds) 2793 { 2794 struct sta_info *sta; 2795 2796 sta = ap_get_sta(hapd, src); 2797 if (sta && (sta->flags & WLAN_STA_ASSOC)) { 2798 if (!hapd->conf->wds_sta) 2799 return; 2800 2801 if (wds && !(sta->flags & WLAN_STA_WDS)) { 2802 int ret; 2803 char ifname_wds[IFNAMSIZ + 1]; 2804 2805 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for " 2806 "STA " MACSTR " (aid %u)", 2807 MAC2STR(sta->addr), sta->aid); 2808 sta->flags |= WLAN_STA_WDS; 2809 ret = hostapd_set_wds_sta(hapd, ifname_wds, 2810 sta->addr, sta->aid, 1); 2811 if (!ret) 2812 hostapd_set_wds_encryption(hapd, sta, 2813 ifname_wds); 2814 } 2815 return; 2816 } 2817 2818 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA " 2819 MACSTR, MAC2STR(src)); 2820 if (src[0] & 0x01) { 2821 /* Broadcast bit set in SA?! Ignore the frame silently. */ 2822 return; 2823 } 2824 2825 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) { 2826 wpa_printf(MSG_DEBUG, "Association Response to the STA has " 2827 "already been sent, but no TX status yet known - " 2828 "ignore Class 3 frame issue with " MACSTR, 2829 MAC2STR(src)); 2830 return; 2831 } 2832 2833 if (sta && (sta->flags & WLAN_STA_AUTH)) 2834 hostapd_drv_sta_disassoc( 2835 hapd, src, 2836 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2837 else 2838 hostapd_drv_sta_deauth( 2839 hapd, src, 2840 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 2841 } 2842 2843 2844 #endif /* CONFIG_NATIVE_WINDOWS */ 2845