ieee802_11.c revision 497c1d5e50162d6b3c1cce5dbd9c5fd9da69aaef
1/* 2 * hostapd / IEEE 802.11 Management 3 * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15#include "utils/includes.h" 16 17#ifndef CONFIG_NATIVE_WINDOWS 18 19#include "utils/common.h" 20#include "utils/eloop.h" 21#include "crypto/crypto.h" 22#include "drivers/driver.h" 23#include "common/ieee802_11_defs.h" 24#include "common/ieee802_11_common.h" 25#include "common/wpa_ctrl.h" 26#include "radius/radius.h" 27#include "radius/radius_client.h" 28#include "p2p/p2p.h" 29#include "wps/wps.h" 30#include "hostapd.h" 31#include "beacon.h" 32#include "ieee802_11_auth.h" 33#include "sta_info.h" 34#include "ieee802_1x.h" 35#include "wpa_auth.h" 36#include "wmm.h" 37#include "ap_list.h" 38#include "accounting.h" 39#include "ap_config.h" 40#include "ap_mlme.h" 41#include "p2p_hostapd.h" 42#include "ap_drv_ops.h" 43#include "ieee802_11.h" 44 45 46u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid) 47{ 48 u8 *pos = eid; 49 int i, num, count; 50 51 if (hapd->iface->current_rates == NULL) 52 return eid; 53 54 *pos++ = WLAN_EID_SUPP_RATES; 55 num = hapd->iface->num_rates; 56 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) 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 && 76 hapd->iface->num_rates < 8) 77 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; 78 79 return pos; 80} 81 82 83u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid) 84{ 85 u8 *pos = eid; 86 int i, num, count; 87 88 if (hapd->iface->current_rates == NULL) 89 return eid; 90 91 num = hapd->iface->num_rates; 92 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) 93 num++; 94 if (num <= 8) 95 return eid; 96 num -= 8; 97 98 *pos++ = WLAN_EID_EXT_SUPP_RATES; 99 *pos++ = num; 100 count = 0; 101 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8; 102 i++) { 103 count++; 104 if (count <= 8) 105 continue; /* already in SuppRates IE */ 106 *pos = hapd->iface->current_rates[i].rate / 5; 107 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) 108 *pos |= 0x80; 109 pos++; 110 } 111 112 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && 113 hapd->iface->num_rates >= 8) 114 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; 115 116 return pos; 117} 118 119 120u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta, 121 int probe) 122{ 123 int capab = WLAN_CAPABILITY_ESS; 124 int privacy; 125 126 if (hapd->iface->num_sta_no_short_preamble == 0 && 127 hapd->iconf->preamble == SHORT_PREAMBLE) 128 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 129 130 privacy = hapd->conf->ssid.wep.keys_set; 131 132 if (hapd->conf->ieee802_1x && 133 (hapd->conf->default_wep_key_len || 134 hapd->conf->individual_wep_key_len)) 135 privacy = 1; 136 137 if (hapd->conf->wpa) 138 privacy = 1; 139 140 if (sta) { 141 int policy, def_klen; 142 if (probe && sta->ssid_probe) { 143 policy = sta->ssid_probe->security_policy; 144 def_klen = sta->ssid_probe->wep.default_len; 145 } else { 146 policy = sta->ssid->security_policy; 147 def_klen = sta->ssid->wep.default_len; 148 } 149 privacy = policy != SECURITY_PLAINTEXT; 150 if (policy == SECURITY_IEEE_802_1X && def_klen == 0) 151 privacy = 0; 152 } 153 154 if (privacy) 155 capab |= WLAN_CAPABILITY_PRIVACY; 156 157 if (hapd->iface->current_mode && 158 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && 159 hapd->iface->num_sta_no_short_slot_time == 0) 160 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 161 162 return capab; 163} 164 165 166u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid) 167{ 168 u8 *pos = eid; 169 170 if ((hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) == 171 0) 172 return eid; 173 174 *pos++ = WLAN_EID_EXT_CAPAB; 175 *pos++ = 5; 176 *pos++ = 0x00; 177 *pos++ = 0x00; 178 *pos++ = 0x00; 179 *pos++ = 0x00; 180 *pos = 0x00; 181 if (hapd->conf->tdls & TDLS_PROHIBIT) 182 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */ 183 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) 184 *pos |= 0x80; /* Bit 39 - TDLS Channel Switching Prohibited */ 185 pos++; 186 187 return pos; 188} 189 190 191#ifdef CONFIG_IEEE80211W 192static u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd, 193 struct sta_info *sta, u8 *eid) 194{ 195 u8 *pos = eid; 196 u32 timeout, tu; 197 struct os_time now, passed; 198 199 *pos++ = WLAN_EID_TIMEOUT_INTERVAL; 200 *pos++ = 5; 201 *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK; 202 os_get_time(&now); 203 os_time_sub(&now, &sta->sa_query_start, &passed); 204 tu = (passed.sec * 1000000 + passed.usec) / 1024; 205 if (hapd->conf->assoc_sa_query_max_timeout > tu) 206 timeout = hapd->conf->assoc_sa_query_max_timeout - tu; 207 else 208 timeout = 0; 209 if (timeout < hapd->conf->assoc_sa_query_max_timeout) 210 timeout++; /* add some extra time for local timers */ 211 WPA_PUT_LE32(pos, timeout); 212 pos += 4; 213 214 return pos; 215} 216#endif /* CONFIG_IEEE80211W */ 217 218 219void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len) 220{ 221 int i; 222 if (len > HOSTAPD_MAX_SSID_LEN) 223 len = HOSTAPD_MAX_SSID_LEN; 224 for (i = 0; i < len; i++) { 225 if (ssid[i] >= 32 && ssid[i] < 127) 226 buf[i] = ssid[i]; 227 else 228 buf[i] = '.'; 229 } 230 buf[len] = '\0'; 231} 232 233 234static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta, 235 u16 auth_transaction, const u8 *challenge, 236 int iswep) 237{ 238 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 239 HOSTAPD_LEVEL_DEBUG, 240 "authentication (shared key, transaction %d)", 241 auth_transaction); 242 243 if (auth_transaction == 1) { 244 if (!sta->challenge) { 245 /* Generate a pseudo-random challenge */ 246 u8 key[8]; 247 struct os_time now; 248 int r; 249 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN); 250 if (sta->challenge == NULL) 251 return WLAN_STATUS_UNSPECIFIED_FAILURE; 252 253 os_get_time(&now); 254 r = os_random(); 255 os_memcpy(key, &now.sec, 4); 256 os_memcpy(key + 4, &r, 4); 257 rc4_skip(key, sizeof(key), 0, 258 sta->challenge, WLAN_AUTH_CHALLENGE_LEN); 259 } 260 return 0; 261 } 262 263 if (auth_transaction != 3) 264 return WLAN_STATUS_UNSPECIFIED_FAILURE; 265 266 /* Transaction 3 */ 267 if (!iswep || !sta->challenge || !challenge || 268 os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) { 269 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 270 HOSTAPD_LEVEL_INFO, 271 "shared key authentication - invalid " 272 "challenge-response"); 273 return WLAN_STATUS_CHALLENGE_FAIL; 274 } 275 276 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 277 HOSTAPD_LEVEL_DEBUG, 278 "authentication OK (shared key)"); 279#ifdef IEEE80211_REQUIRE_AUTH_ACK 280 /* Station will be marked authenticated if it ACKs the 281 * authentication reply. */ 282#else 283 sta->flags |= WLAN_STA_AUTH; 284 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 285#endif 286 os_free(sta->challenge); 287 sta->challenge = NULL; 288 289 return 0; 290} 291 292 293static void send_auth_reply(struct hostapd_data *hapd, 294 const u8 *dst, const u8 *bssid, 295 u16 auth_alg, u16 auth_transaction, u16 resp, 296 const u8 *ies, size_t ies_len) 297{ 298 struct ieee80211_mgmt *reply; 299 u8 *buf; 300 size_t rlen; 301 302 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len; 303 buf = os_zalloc(rlen); 304 if (buf == NULL) 305 return; 306 307 reply = (struct ieee80211_mgmt *) buf; 308 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 309 WLAN_FC_STYPE_AUTH); 310 os_memcpy(reply->da, dst, ETH_ALEN); 311 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 312 os_memcpy(reply->bssid, bssid, ETH_ALEN); 313 314 reply->u.auth.auth_alg = host_to_le16(auth_alg); 315 reply->u.auth.auth_transaction = host_to_le16(auth_transaction); 316 reply->u.auth.status_code = host_to_le16(resp); 317 318 if (ies && ies_len) 319 os_memcpy(reply->u.auth.variable, ies, ies_len); 320 321 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR 322 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)", 323 MAC2STR(dst), auth_alg, auth_transaction, 324 resp, (unsigned long) ies_len); 325 if (hostapd_drv_send_mlme(hapd, reply, rlen) < 0) 326 perror("send_auth_reply: send"); 327 328 os_free(buf); 329} 330 331 332#ifdef CONFIG_IEEE80211R 333static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid, 334 u16 auth_transaction, u16 status, 335 const u8 *ies, size_t ies_len) 336{ 337 struct hostapd_data *hapd = ctx; 338 struct sta_info *sta; 339 340 send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction, 341 status, ies, ies_len); 342 343 if (status != WLAN_STATUS_SUCCESS) 344 return; 345 346 sta = ap_get_sta(hapd, dst); 347 if (sta == NULL) 348 return; 349 350 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211, 351 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)"); 352 sta->flags |= WLAN_STA_AUTH; 353 mlme_authenticate_indication(hapd, sta); 354} 355#endif /* CONFIG_IEEE80211R */ 356 357 358static void handle_auth(struct hostapd_data *hapd, 359 const struct ieee80211_mgmt *mgmt, size_t len) 360{ 361 u16 auth_alg, auth_transaction, status_code; 362 u16 resp = WLAN_STATUS_SUCCESS; 363 struct sta_info *sta = NULL; 364 int res; 365 u16 fc; 366 const u8 *challenge = NULL; 367 u32 session_timeout, acct_interim_interval; 368 int vlan_id = 0; 369 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; 370 size_t resp_ies_len = 0; 371 372 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 373 printf("handle_auth - too short payload (len=%lu)\n", 374 (unsigned long) len); 375 return; 376 } 377 378 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 379 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 380 status_code = le_to_host16(mgmt->u.auth.status_code); 381 fc = le_to_host16(mgmt->frame_control); 382 383 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 384 2 + WLAN_AUTH_CHALLENGE_LEN && 385 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE && 386 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN) 387 challenge = &mgmt->u.auth.variable[2]; 388 389 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d " 390 "auth_transaction=%d status_code=%d wep=%d%s", 391 MAC2STR(mgmt->sa), auth_alg, auth_transaction, 392 status_code, !!(fc & WLAN_FC_ISWEP), 393 challenge ? " challenge" : ""); 394 395 if (hapd->tkip_countermeasures) { 396 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 397 goto fail; 398 } 399 400 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) && 401 auth_alg == WLAN_AUTH_OPEN) || 402#ifdef CONFIG_IEEE80211R 403 (hapd->conf->wpa && 404 (hapd->conf->wpa_key_mgmt & 405 (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) && 406 auth_alg == WLAN_AUTH_FT) || 407#endif /* CONFIG_IEEE80211R */ 408 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) && 409 auth_alg == WLAN_AUTH_SHARED_KEY))) { 410 printf("Unsupported authentication algorithm (%d)\n", 411 auth_alg); 412 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; 413 goto fail; 414 } 415 416 if (!(auth_transaction == 1 || 417 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) { 418 printf("Unknown authentication transaction number (%d)\n", 419 auth_transaction); 420 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; 421 goto fail; 422 } 423 424 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { 425 printf("Station " MACSTR " not allowed to authenticate.\n", 426 MAC2STR(mgmt->sa)); 427 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 428 goto fail; 429 } 430 431 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len, 432 &session_timeout, 433 &acct_interim_interval, &vlan_id); 434 if (res == HOSTAPD_ACL_REJECT) { 435 printf("Station " MACSTR " not allowed to authenticate.\n", 436 MAC2STR(mgmt->sa)); 437 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 438 goto fail; 439 } 440 if (res == HOSTAPD_ACL_PENDING) { 441 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR 442 " waiting for an external authentication", 443 MAC2STR(mgmt->sa)); 444 /* Authentication code will re-send the authentication frame 445 * after it has received (and cached) information from the 446 * external source. */ 447 return; 448 } 449 450 sta = ap_sta_add(hapd, mgmt->sa); 451 if (!sta) { 452 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 453 goto fail; 454 } 455 456 if (vlan_id > 0) { 457 if (hostapd_get_vlan_id_ifname(hapd->conf->vlan, 458 vlan_id) == NULL) { 459 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 460 HOSTAPD_LEVEL_INFO, "Invalid VLAN ID " 461 "%d received from RADIUS server", 462 vlan_id); 463 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 464 goto fail; 465 } 466 sta->vlan_id = vlan_id; 467 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 468 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); 469 } 470 471 sta->flags &= ~WLAN_STA_PREAUTH; 472 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); 473 474 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval) 475 sta->acct_interim_interval = acct_interim_interval; 476 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) 477 ap_sta_session_timeout(hapd, sta, session_timeout); 478 else 479 ap_sta_no_session_timeout(hapd, sta); 480 481 switch (auth_alg) { 482 case WLAN_AUTH_OPEN: 483 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 484 HOSTAPD_LEVEL_DEBUG, 485 "authentication OK (open system)"); 486#ifdef IEEE80211_REQUIRE_AUTH_ACK 487 /* Station will be marked authenticated if it ACKs the 488 * authentication reply. */ 489#else 490 sta->flags |= WLAN_STA_AUTH; 491 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); 492 sta->auth_alg = WLAN_AUTH_OPEN; 493 mlme_authenticate_indication(hapd, sta); 494#endif 495 break; 496 case WLAN_AUTH_SHARED_KEY: 497 resp = auth_shared_key(hapd, sta, auth_transaction, challenge, 498 fc & WLAN_FC_ISWEP); 499 sta->auth_alg = WLAN_AUTH_SHARED_KEY; 500 mlme_authenticate_indication(hapd, sta); 501 if (sta->challenge && auth_transaction == 1) { 502 resp_ies[0] = WLAN_EID_CHALLENGE; 503 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN; 504 os_memcpy(resp_ies + 2, sta->challenge, 505 WLAN_AUTH_CHALLENGE_LEN); 506 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN; 507 } 508 break; 509#ifdef CONFIG_IEEE80211R 510 case WLAN_AUTH_FT: 511 sta->auth_alg = WLAN_AUTH_FT; 512 if (sta->wpa_sm == NULL) 513 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 514 sta->addr); 515 if (sta->wpa_sm == NULL) { 516 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " 517 "state machine"); 518 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 519 goto fail; 520 } 521 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid, 522 auth_transaction, mgmt->u.auth.variable, 523 len - IEEE80211_HDRLEN - 524 sizeof(mgmt->u.auth), 525 handle_auth_ft_finish, hapd); 526 /* handle_auth_ft_finish() callback will complete auth. */ 527 return; 528#endif /* CONFIG_IEEE80211R */ 529 } 530 531 fail: 532 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg, 533 auth_transaction + 1, resp, resp_ies, resp_ies_len); 534} 535 536 537static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta) 538{ 539 int i, j = 32, aid; 540 541 /* get a unique AID */ 542 if (sta->aid > 0) { 543 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid); 544 return 0; 545 } 546 547 for (i = 0; i < AID_WORDS; i++) { 548 if (hapd->sta_aid[i] == (u32) -1) 549 continue; 550 for (j = 0; j < 32; j++) { 551 if (!(hapd->sta_aid[i] & BIT(j))) 552 break; 553 } 554 if (j < 32) 555 break; 556 } 557 if (j == 32) 558 return -1; 559 aid = i * 32 + j + 1; 560 if (aid > 2007) 561 return -1; 562 563 sta->aid = aid; 564 hapd->sta_aid[i] |= BIT(j); 565 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid); 566 return 0; 567} 568 569 570static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta, 571 const u8 *ssid_ie, size_t ssid_ie_len) 572{ 573 if (ssid_ie == NULL) 574 return WLAN_STATUS_UNSPECIFIED_FAILURE; 575 576 if (ssid_ie_len != hapd->conf->ssid.ssid_len || 577 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) { 578 char ssid_txt[33]; 579 ieee802_11_print_ssid(ssid_txt, ssid_ie, ssid_ie_len); 580 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 581 HOSTAPD_LEVEL_INFO, 582 "Station tried to associate with unknown SSID " 583 "'%s'", ssid_txt); 584 return WLAN_STATUS_UNSPECIFIED_FAILURE; 585 } 586 587 return WLAN_STATUS_SUCCESS; 588} 589 590 591static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta, 592 const u8 *wmm_ie, size_t wmm_ie_len) 593{ 594 sta->flags &= ~WLAN_STA_WMM; 595 if (wmm_ie && hapd->conf->wmm_enabled) { 596 if (hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) 597 hostapd_logger(hapd, sta->addr, 598 HOSTAPD_MODULE_WPA, 599 HOSTAPD_LEVEL_DEBUG, 600 "invalid WMM element in association " 601 "request"); 602 else 603 sta->flags |= WLAN_STA_WMM; 604 } 605 return WLAN_STATUS_SUCCESS; 606} 607 608 609static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta, 610 struct ieee802_11_elems *elems) 611{ 612 if (!elems->supp_rates) { 613 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 614 HOSTAPD_LEVEL_DEBUG, 615 "No supported rates element in AssocReq"); 616 return WLAN_STATUS_UNSPECIFIED_FAILURE; 617 } 618 619 if (elems->supp_rates_len > sizeof(sta->supported_rates)) { 620 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 621 HOSTAPD_LEVEL_DEBUG, 622 "Invalid supported rates element length %d", 623 elems->supp_rates_len); 624 return WLAN_STATUS_UNSPECIFIED_FAILURE; 625 } 626 627 os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates)); 628 os_memcpy(sta->supported_rates, elems->supp_rates, 629 elems->supp_rates_len); 630 sta->supported_rates_len = elems->supp_rates_len; 631 632 if (elems->ext_supp_rates) { 633 if (elems->supp_rates_len + elems->ext_supp_rates_len > 634 sizeof(sta->supported_rates)) { 635 hostapd_logger(hapd, sta->addr, 636 HOSTAPD_MODULE_IEEE80211, 637 HOSTAPD_LEVEL_DEBUG, 638 "Invalid supported rates element length" 639 " %d+%d", elems->supp_rates_len, 640 elems->ext_supp_rates_len); 641 return WLAN_STATUS_UNSPECIFIED_FAILURE; 642 } 643 644 os_memcpy(sta->supported_rates + elems->supp_rates_len, 645 elems->ext_supp_rates, elems->ext_supp_rates_len); 646 sta->supported_rates_len += elems->ext_supp_rates_len; 647 } 648 649 return WLAN_STATUS_SUCCESS; 650} 651 652 653static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, 654 const u8 *ies, size_t ies_len, int reassoc) 655{ 656 struct ieee802_11_elems elems; 657 u16 resp; 658 const u8 *wpa_ie; 659 size_t wpa_ie_len; 660 661 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { 662 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 663 HOSTAPD_LEVEL_INFO, "Station sent an invalid " 664 "association request"); 665 return WLAN_STATUS_UNSPECIFIED_FAILURE; 666 } 667 668 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len); 669 if (resp != WLAN_STATUS_SUCCESS) 670 return resp; 671 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len); 672 if (resp != WLAN_STATUS_SUCCESS) 673 return resp; 674 resp = copy_supp_rates(hapd, sta, &elems); 675 if (resp != WLAN_STATUS_SUCCESS) 676 return resp; 677#ifdef CONFIG_IEEE80211N 678 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities, 679 elems.ht_capabilities_len); 680 if (resp != WLAN_STATUS_SUCCESS) 681 return resp; 682 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && 683 !(sta->flags & WLAN_STA_HT)) { 684 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 685 HOSTAPD_LEVEL_INFO, "Station does not support " 686 "mandatory HT PHY - reject association"); 687 return WLAN_STATUS_ASSOC_DENIED_NO_HT; 688 } 689#endif /* CONFIG_IEEE80211N */ 690 691 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { 692 wpa_ie = elems.rsn_ie; 693 wpa_ie_len = elems.rsn_ie_len; 694 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) && 695 elems.wpa_ie) { 696 wpa_ie = elems.wpa_ie; 697 wpa_ie_len = elems.wpa_ie_len; 698 } else { 699 wpa_ie = NULL; 700 wpa_ie_len = 0; 701 } 702 703#ifdef CONFIG_WPS 704 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS); 705 if (hapd->conf->wps_state && elems.wps_ie) { 706 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association " 707 "Request - assume WPS is used"); 708 sta->flags |= WLAN_STA_WPS; 709 wpabuf_free(sta->wps_ie); 710 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 711 WPS_IE_VENDOR_TYPE); 712 wpa_ie = NULL; 713 wpa_ie_len = 0; 714 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) { 715 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in " 716 "(Re)Association Request - reject"); 717 return WLAN_STATUS_INVALID_IE; 718 } 719 } else if (hapd->conf->wps_state && wpa_ie == NULL) { 720 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in " 721 "(Re)Association Request - possible WPS use"); 722 sta->flags |= WLAN_STA_MAYBE_WPS; 723 } else 724#endif /* CONFIG_WPS */ 725 if (hapd->conf->wpa && wpa_ie == NULL) { 726 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 727 HOSTAPD_LEVEL_INFO, 728 "No WPA/RSN IE in association request"); 729 return WLAN_STATUS_INVALID_IE; 730 } 731 732 if (hapd->conf->wpa && wpa_ie) { 733 int res; 734 wpa_ie -= 2; 735 wpa_ie_len += 2; 736 if (sta->wpa_sm == NULL) 737 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, 738 sta->addr); 739 if (sta->wpa_sm == NULL) { 740 wpa_printf(MSG_WARNING, "Failed to initialize WPA " 741 "state machine"); 742 return WLAN_STATUS_UNSPECIFIED_FAILURE; 743 } 744 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, 745 wpa_ie, wpa_ie_len, 746 elems.mdie, elems.mdie_len); 747 if (res == WPA_INVALID_GROUP) 748 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; 749 else if (res == WPA_INVALID_PAIRWISE) 750 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; 751 else if (res == WPA_INVALID_AKMP) 752 resp = WLAN_STATUS_AKMP_NOT_VALID; 753 else if (res == WPA_ALLOC_FAIL) 754 resp = WLAN_STATUS_UNSPECIFIED_FAILURE; 755#ifdef CONFIG_IEEE80211W 756 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) 757 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 758 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) 759 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; 760#endif /* CONFIG_IEEE80211W */ 761 else if (res == WPA_INVALID_MDIE) 762 resp = WLAN_STATUS_INVALID_MDIE; 763 else if (res != WPA_IE_OK) 764 resp = WLAN_STATUS_INVALID_IE; 765 if (resp != WLAN_STATUS_SUCCESS) 766 return resp; 767#ifdef CONFIG_IEEE80211W 768 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 769 sta->sa_query_count > 0) 770 ap_check_sa_query_timeout(hapd, sta); 771 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && 772 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) { 773 /* 774 * STA has already been associated with MFP and SA 775 * Query timeout has not been reached. Reject the 776 * association attempt temporarily and start SA Query, 777 * if one is not pending. 778 */ 779 780 if (sta->sa_query_count == 0) 781 ap_sta_start_sa_query(hapd, sta); 782 783 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; 784 } 785 786 if (wpa_auth_uses_mfp(sta->wpa_sm)) 787 sta->flags |= WLAN_STA_MFP; 788 else 789 sta->flags &= ~WLAN_STA_MFP; 790#endif /* CONFIG_IEEE80211W */ 791 792#ifdef CONFIG_IEEE80211R 793 if (sta->auth_alg == WLAN_AUTH_FT) { 794 if (!reassoc) { 795 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried " 796 "to use association (not " 797 "re-association) with FT auth_alg", 798 MAC2STR(sta->addr)); 799 return WLAN_STATUS_UNSPECIFIED_FAILURE; 800 } 801 802 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies, 803 ies_len); 804 if (resp != WLAN_STATUS_SUCCESS) 805 return resp; 806 } 807#endif /* CONFIG_IEEE80211R */ 808 809#ifdef CONFIG_IEEE80211N 810 if ((sta->flags & WLAN_STA_HT) && 811 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) { 812 hostapd_logger(hapd, sta->addr, 813 HOSTAPD_MODULE_IEEE80211, 814 HOSTAPD_LEVEL_INFO, 815 "Station tried to use TKIP with HT " 816 "association"); 817 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; 818 } 819#endif /* CONFIG_IEEE80211N */ 820 } else 821 wpa_auth_sta_no_wpa(sta->wpa_sm); 822 823#ifdef CONFIG_P2P 824 if (elems.p2p) { 825 wpabuf_free(sta->p2p_ie); 826 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 827 P2P_IE_VENDOR_TYPE); 828 829 } else { 830 wpabuf_free(sta->p2p_ie); 831 sta->p2p_ie = NULL; 832 } 833 834 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len); 835#endif /* CONFIG_P2P */ 836 837 return WLAN_STATUS_SUCCESS; 838} 839 840 841static void send_deauth(struct hostapd_data *hapd, const u8 *addr, 842 u16 reason_code) 843{ 844 int send_len; 845 struct ieee80211_mgmt reply; 846 847 os_memset(&reply, 0, sizeof(reply)); 848 reply.frame_control = 849 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); 850 os_memcpy(reply.da, addr, ETH_ALEN); 851 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN); 852 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN); 853 854 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth); 855 reply.u.deauth.reason_code = host_to_le16(reason_code); 856 857 if (hostapd_drv_send_mlme(hapd, &reply, send_len) < 0) 858 wpa_printf(MSG_INFO, "Failed to send deauth: %s", 859 strerror(errno)); 860} 861 862 863static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta, 864 u16 status_code, int reassoc, const u8 *ies, 865 size_t ies_len) 866{ 867 int send_len; 868 u8 buf[sizeof(struct ieee80211_mgmt) + 1024]; 869 struct ieee80211_mgmt *reply; 870 u8 *p; 871 872 os_memset(buf, 0, sizeof(buf)); 873 reply = (struct ieee80211_mgmt *) buf; 874 reply->frame_control = 875 IEEE80211_FC(WLAN_FC_TYPE_MGMT, 876 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP : 877 WLAN_FC_STYPE_ASSOC_RESP)); 878 os_memcpy(reply->da, sta->addr, ETH_ALEN); 879 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); 880 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN); 881 882 send_len = IEEE80211_HDRLEN; 883 send_len += sizeof(reply->u.assoc_resp); 884 reply->u.assoc_resp.capab_info = 885 host_to_le16(hostapd_own_capab_info(hapd, sta, 0)); 886 reply->u.assoc_resp.status_code = host_to_le16(status_code); 887 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) 888 | BIT(14) | BIT(15)); 889 /* Supported rates */ 890 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable); 891 /* Extended supported rates */ 892 p = hostapd_eid_ext_supp_rates(hapd, p); 893 894#ifdef CONFIG_IEEE80211R 895 if (status_code == WLAN_STATUS_SUCCESS) { 896 /* IEEE 802.11r: Mobility Domain Information, Fast BSS 897 * Transition Information, RSN, [RIC Response] */ 898 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p, 899 buf + sizeof(buf) - p, 900 sta->auth_alg, ies, ies_len); 901 } 902#endif /* CONFIG_IEEE80211R */ 903 904#ifdef CONFIG_IEEE80211W 905 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) 906 p = hostapd_eid_assoc_comeback_time(hapd, sta, p); 907#endif /* CONFIG_IEEE80211W */ 908 909#ifdef CONFIG_IEEE80211N 910 p = hostapd_eid_ht_capabilities(hapd, p); 911 p = hostapd_eid_ht_operation(hapd, p); 912#endif /* CONFIG_IEEE80211N */ 913 914 p = hostapd_eid_ext_capab(hapd, p); 915 916 if (sta->flags & WLAN_STA_WMM) 917 p = hostapd_eid_wmm(hapd, p); 918 919#ifdef CONFIG_WPS 920 if (sta->flags & WLAN_STA_WPS) { 921 struct wpabuf *wps = wps_build_assoc_resp_ie(); 922 if (wps) { 923 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps)); 924 p += wpabuf_len(wps); 925 wpabuf_free(wps); 926 } 927 } 928#endif /* CONFIG_WPS */ 929 930#ifdef CONFIG_P2P 931 if (sta->p2p_ie) { 932 struct wpabuf *p2p_resp_ie; 933 enum p2p_status_code status; 934 switch (status_code) { 935 case WLAN_STATUS_SUCCESS: 936 status = P2P_SC_SUCCESS; 937 break; 938 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA: 939 status = P2P_SC_FAIL_LIMIT_REACHED; 940 break; 941 default: 942 status = P2P_SC_FAIL_INVALID_PARAMS; 943 break; 944 } 945 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status); 946 if (p2p_resp_ie) { 947 os_memcpy(p, wpabuf_head(p2p_resp_ie), 948 wpabuf_len(p2p_resp_ie)); 949 p += wpabuf_len(p2p_resp_ie); 950 wpabuf_free(p2p_resp_ie); 951 } 952 } 953#endif /* CONFIG_P2P */ 954 955#ifdef CONFIG_P2P_MANAGER 956 if (hapd->conf->p2p & P2P_MANAGE) 957 p = hostapd_eid_p2p_manage(hapd, p); 958#endif /* CONFIG_P2P_MANAGER */ 959 960 send_len += p - reply->u.assoc_resp.variable; 961 962 if (hostapd_drv_send_mlme(hapd, reply, send_len) < 0) 963 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s", 964 strerror(errno)); 965} 966 967 968static void handle_assoc(struct hostapd_data *hapd, 969 const struct ieee80211_mgmt *mgmt, size_t len, 970 int reassoc) 971{ 972 u16 capab_info, listen_interval; 973 u16 resp = WLAN_STATUS_SUCCESS; 974 const u8 *pos; 975 int left, i; 976 struct sta_info *sta; 977 978 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) : 979 sizeof(mgmt->u.assoc_req))) { 980 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)" 981 "\n", reassoc, (unsigned long) len); 982 return; 983 } 984 985 if (reassoc) { 986 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info); 987 listen_interval = le_to_host16( 988 mgmt->u.reassoc_req.listen_interval); 989 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR 990 " capab_info=0x%02x listen_interval=%d current_ap=" 991 MACSTR, 992 MAC2STR(mgmt->sa), capab_info, listen_interval, 993 MAC2STR(mgmt->u.reassoc_req.current_ap)); 994 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req)); 995 pos = mgmt->u.reassoc_req.variable; 996 } else { 997 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info); 998 listen_interval = le_to_host16( 999 mgmt->u.assoc_req.listen_interval); 1000 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR 1001 " capab_info=0x%02x listen_interval=%d", 1002 MAC2STR(mgmt->sa), capab_info, listen_interval); 1003 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req)); 1004 pos = mgmt->u.assoc_req.variable; 1005 } 1006 1007 sta = ap_get_sta(hapd, mgmt->sa); 1008#ifdef CONFIG_IEEE80211R 1009 if (sta && sta->auth_alg == WLAN_AUTH_FT && 1010 (sta->flags & WLAN_STA_AUTH) == 0) { 1011 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate " 1012 "prior to authentication since it is using " 1013 "over-the-DS FT", MAC2STR(mgmt->sa)); 1014 } else 1015#endif /* CONFIG_IEEE80211R */ 1016 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) { 1017 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1018 HOSTAPD_LEVEL_INFO, "Station tried to " 1019 "associate before authentication " 1020 "(aid=%d flags=0x%x)", 1021 sta ? sta->aid : -1, 1022 sta ? sta->flags : 0); 1023 send_deauth(hapd, mgmt->sa, 1024 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA); 1025 return; 1026 } 1027 1028 if (hapd->tkip_countermeasures) { 1029 resp = WLAN_REASON_MICHAEL_MIC_FAILURE; 1030 goto fail; 1031 } 1032 1033 if (listen_interval > hapd->conf->max_listen_interval) { 1034 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1035 HOSTAPD_LEVEL_DEBUG, 1036 "Too large Listen Interval (%d)", 1037 listen_interval); 1038 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE; 1039 goto fail; 1040 } 1041 1042 /* followed by SSID and Supported rates; and HT capabilities if 802.11n 1043 * is used */ 1044 resp = check_assoc_ies(hapd, sta, pos, left, reassoc); 1045 if (resp != WLAN_STATUS_SUCCESS) 1046 goto fail; 1047 1048 if (hostapd_get_aid(hapd, sta) < 0) { 1049 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1050 HOSTAPD_LEVEL_INFO, "No room for more AIDs"); 1051 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; 1052 goto fail; 1053 } 1054 1055 sta->capability = capab_info; 1056 sta->listen_interval = listen_interval; 1057 1058 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) 1059 sta->flags |= WLAN_STA_NONERP; 1060 for (i = 0; i < sta->supported_rates_len; i++) { 1061 if ((sta->supported_rates[i] & 0x7f) > 22) { 1062 sta->flags &= ~WLAN_STA_NONERP; 1063 break; 1064 } 1065 } 1066 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) { 1067 sta->nonerp_set = 1; 1068 hapd->iface->num_sta_non_erp++; 1069 if (hapd->iface->num_sta_non_erp == 1) 1070 ieee802_11_set_beacons(hapd->iface); 1071 } 1072 1073 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) && 1074 !sta->no_short_slot_time_set) { 1075 sta->no_short_slot_time_set = 1; 1076 hapd->iface->num_sta_no_short_slot_time++; 1077 if (hapd->iface->current_mode->mode == 1078 HOSTAPD_MODE_IEEE80211G && 1079 hapd->iface->num_sta_no_short_slot_time == 1) 1080 ieee802_11_set_beacons(hapd->iface); 1081 } 1082 1083 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) 1084 sta->flags |= WLAN_STA_SHORT_PREAMBLE; 1085 else 1086 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; 1087 1088 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && 1089 !sta->no_short_preamble_set) { 1090 sta->no_short_preamble_set = 1; 1091 hapd->iface->num_sta_no_short_preamble++; 1092 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G 1093 && hapd->iface->num_sta_no_short_preamble == 1) 1094 ieee802_11_set_beacons(hapd->iface); 1095 } 1096 1097#ifdef CONFIG_IEEE80211N 1098 update_ht_state(hapd, sta); 1099#endif /* CONFIG_IEEE80211N */ 1100 1101 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1102 HOSTAPD_LEVEL_DEBUG, 1103 "association OK (aid %d)", sta->aid); 1104 /* Station will be marked associated, after it acknowledges AssocResp 1105 */ 1106 sta->flags |= WLAN_STA_ASSOC_REQ_OK; 1107 1108#ifdef CONFIG_IEEE80211W 1109 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) { 1110 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out " 1111 "SA Query procedure", reassoc ? "re" : ""); 1112 /* TODO: Send a protected Disassociate frame to the STA using 1113 * the old key and Reason Code "Previous Authentication no 1114 * longer valid". Make sure this is only sent protected since 1115 * unprotected frame would be received by the STA that is now 1116 * trying to associate. 1117 */ 1118 } 1119#endif /* CONFIG_IEEE80211W */ 1120 1121 if (reassoc) { 1122 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap, 1123 ETH_ALEN); 1124 } 1125 1126 if (sta->last_assoc_req) 1127 os_free(sta->last_assoc_req); 1128 sta->last_assoc_req = os_malloc(len); 1129 if (sta->last_assoc_req) 1130 os_memcpy(sta->last_assoc_req, mgmt, len); 1131 1132 /* Make sure that the previously registered inactivity timer will not 1133 * remove the STA immediately. */ 1134 sta->timeout_next = STA_NULLFUNC; 1135 1136 fail: 1137 send_assoc_resp(hapd, sta, resp, reassoc, pos, left); 1138} 1139 1140 1141static void handle_disassoc(struct hostapd_data *hapd, 1142 const struct ieee80211_mgmt *mgmt, size_t len) 1143{ 1144 struct sta_info *sta; 1145 1146 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) { 1147 printf("handle_disassoc - too short payload (len=%lu)\n", 1148 (unsigned long) len); 1149 return; 1150 } 1151 1152 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d", 1153 MAC2STR(mgmt->sa), 1154 le_to_host16(mgmt->u.disassoc.reason_code)); 1155 1156 sta = ap_get_sta(hapd, mgmt->sa); 1157 if (sta == NULL) { 1158 printf("Station " MACSTR " trying to disassociate, but it " 1159 "is not associated.\n", MAC2STR(mgmt->sa)); 1160 return; 1161 } 1162 1163 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK); 1164 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR, 1165 MAC2STR(sta->addr)); 1166#ifdef ANDROID_BRCM_P2P_PATCH 1167 if(hapd->msg_ctx_parent) 1168 wpa_msg(hapd->msg_ctx_parent, MSG_INFO, AP_STA_DISCONNECTED MACSTR, 1169 MAC2STR(sta->addr)); 1170#endif /* ANDROID_BRCM_P2P_PATCH */ 1171 1172 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC); 1173 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1174 HOSTAPD_LEVEL_INFO, "disassociated"); 1175 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1176 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 1177 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA 1178 * authenticated. */ 1179 accounting_sta_stop(hapd, sta); 1180 ieee802_1x_free_station(sta); 1181 hostapd_drv_sta_remove(hapd, sta->addr); 1182 1183 if (sta->timeout_next == STA_NULLFUNC || 1184 sta->timeout_next == STA_DISASSOC) { 1185 sta->timeout_next = STA_DEAUTH; 1186 eloop_cancel_timeout(ap_handle_timer, hapd, sta); 1187 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer, 1188 hapd, sta); 1189 } 1190 1191 mlme_disassociate_indication( 1192 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code)); 1193} 1194 1195 1196static void handle_deauth(struct hostapd_data *hapd, 1197 const struct ieee80211_mgmt *mgmt, size_t len) 1198{ 1199 struct sta_info *sta; 1200 1201 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) { 1202 wpa_msg(hapd, MSG_DEBUG, "handle_deauth - too short payload " 1203 "(len=%lu)", (unsigned long) len); 1204 return; 1205 } 1206 1207 wpa_msg(hapd, MSG_DEBUG, "deauthentication: STA=" MACSTR 1208 " reason_code=%d", 1209 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code)); 1210 1211 sta = ap_get_sta(hapd, mgmt->sa); 1212 if (sta == NULL) { 1213 wpa_msg(hapd, MSG_DEBUG, "Station " MACSTR " trying to " 1214 "deauthenticate, but it is not authenticated", 1215 MAC2STR(mgmt->sa)); 1216 return; 1217 } 1218 1219 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | 1220 WLAN_STA_ASSOC_REQ_OK); 1221 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR, 1222 MAC2STR(sta->addr)); 1223#ifdef ANDROID_BRCM_P2P_PATCH 1224 if(hapd->msg_ctx_parent) 1225 wpa_msg(hapd->msg_ctx_parent, MSG_INFO, AP_STA_DISCONNECTED MACSTR, 1226 MAC2STR(sta->addr)); 1227#endif /* ANDROID_BRCM_P2P_PATCH */ 1228 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH); 1229 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1230 HOSTAPD_LEVEL_DEBUG, "deauthenticated"); 1231 mlme_deauthenticate_indication( 1232 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code)); 1233 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1234 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); 1235 ap_free_sta(hapd, sta); 1236} 1237 1238 1239static void handle_beacon(struct hostapd_data *hapd, 1240 const struct ieee80211_mgmt *mgmt, size_t len, 1241 struct hostapd_frame_info *fi) 1242{ 1243 struct ieee802_11_elems elems; 1244 1245 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) { 1246 printf("handle_beacon - too short payload (len=%lu)\n", 1247 (unsigned long) len); 1248 return; 1249 } 1250 1251 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable, 1252 len - (IEEE80211_HDRLEN + 1253 sizeof(mgmt->u.beacon)), &elems, 1254 0); 1255 1256 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi); 1257} 1258 1259 1260#ifdef CONFIG_IEEE80211W 1261 1262/* MLME-SAQuery.request */ 1263void ieee802_11_send_sa_query_req(struct hostapd_data *hapd, 1264 const u8 *addr, const u8 *trans_id) 1265{ 1266 struct ieee80211_mgmt mgmt; 1267 u8 *end; 1268 1269 wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to " 1270 MACSTR, MAC2STR(addr)); 1271 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 1272 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1273 1274 os_memset(&mgmt, 0, sizeof(mgmt)); 1275 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1276 WLAN_FC_STYPE_ACTION); 1277 os_memcpy(mgmt.da, addr, ETH_ALEN); 1278 os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN); 1279 os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN); 1280 mgmt.u.action.category = WLAN_ACTION_SA_QUERY; 1281 mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST; 1282 os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id, 1283 WLAN_SA_QUERY_TR_ID_LEN); 1284 end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN; 1285 if (hostapd_drv_send_mlme(hapd, &mgmt, end - (u8 *) &mgmt) < 0) 1286 perror("ieee802_11_send_sa_query_req: send"); 1287} 1288 1289 1290static void hostapd_sa_query_request(struct hostapd_data *hapd, 1291 const struct ieee80211_mgmt *mgmt) 1292{ 1293 struct sta_info *sta; 1294 struct ieee80211_mgmt resp; 1295 u8 *end; 1296 1297 wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Request from " 1298 MACSTR, MAC2STR(mgmt->sa)); 1299 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 1300 mgmt->u.action.u.sa_query_resp.trans_id, 1301 WLAN_SA_QUERY_TR_ID_LEN); 1302 1303 sta = ap_get_sta(hapd, mgmt->sa); 1304 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 1305 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore SA Query Request " 1306 "from unassociated STA " MACSTR, MAC2STR(mgmt->sa)); 1307 return; 1308 } 1309 1310 wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Response to " 1311 MACSTR, MAC2STR(mgmt->sa)); 1312 1313 os_memset(&resp, 0, sizeof(resp)); 1314 resp.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 1315 WLAN_FC_STYPE_ACTION); 1316 os_memcpy(resp.da, mgmt->sa, ETH_ALEN); 1317 os_memcpy(resp.sa, hapd->own_addr, ETH_ALEN); 1318 os_memcpy(resp.bssid, hapd->own_addr, ETH_ALEN); 1319 resp.u.action.category = WLAN_ACTION_SA_QUERY; 1320 resp.u.action.u.sa_query_req.action = WLAN_SA_QUERY_RESPONSE; 1321 os_memcpy(resp.u.action.u.sa_query_req.trans_id, 1322 mgmt->u.action.u.sa_query_req.trans_id, 1323 WLAN_SA_QUERY_TR_ID_LEN); 1324 end = resp.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN; 1325 if (hostapd_drv_send_mlme(hapd, &resp, end - (u8 *) &resp) < 0) 1326 perror("hostapd_sa_query_request: send"); 1327} 1328 1329 1330static void hostapd_sa_query_action(struct hostapd_data *hapd, 1331 const struct ieee80211_mgmt *mgmt, 1332 size_t len) 1333{ 1334 struct sta_info *sta; 1335 const u8 *end; 1336 int i; 1337 1338 end = mgmt->u.action.u.sa_query_resp.trans_id + 1339 WLAN_SA_QUERY_TR_ID_LEN; 1340 if (((u8 *) mgmt) + len < end) { 1341 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action " 1342 "frame (len=%lu)", (unsigned long) len); 1343 return; 1344 } 1345 1346 if (mgmt->u.action.u.sa_query_resp.action == WLAN_SA_QUERY_REQUEST) { 1347 hostapd_sa_query_request(hapd, mgmt); 1348 return; 1349 } 1350 1351 if (mgmt->u.action.u.sa_query_resp.action != WLAN_SA_QUERY_RESPONSE) { 1352 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query " 1353 "Action %d", mgmt->u.action.u.sa_query_resp.action); 1354 return; 1355 } 1356 1357 wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from " 1358 MACSTR, MAC2STR(mgmt->sa)); 1359 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 1360 mgmt->u.action.u.sa_query_resp.trans_id, 1361 WLAN_SA_QUERY_TR_ID_LEN); 1362 1363 /* MLME-SAQuery.confirm */ 1364 1365 sta = ap_get_sta(hapd, mgmt->sa); 1366 if (sta == NULL || sta->sa_query_trans_id == NULL) { 1367 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with " 1368 "pending SA Query request found"); 1369 return; 1370 } 1371 1372 for (i = 0; i < sta->sa_query_count; i++) { 1373 if (os_memcmp(sta->sa_query_trans_id + 1374 i * WLAN_SA_QUERY_TR_ID_LEN, 1375 mgmt->u.action.u.sa_query_resp.trans_id, 1376 WLAN_SA_QUERY_TR_ID_LEN) == 0) 1377 break; 1378 } 1379 1380 if (i >= sta->sa_query_count) { 1381 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query " 1382 "transaction identifier found"); 1383 return; 1384 } 1385 1386 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1387 HOSTAPD_LEVEL_DEBUG, 1388 "Reply to pending SA Query received"); 1389 ap_sta_stop_sa_query(hapd, sta); 1390} 1391 1392 1393static int robust_action_frame(u8 category) 1394{ 1395 return category != WLAN_ACTION_PUBLIC && 1396 category != WLAN_ACTION_HT; 1397} 1398#endif /* CONFIG_IEEE80211W */ 1399 1400 1401static void handle_action(struct hostapd_data *hapd, 1402 const struct ieee80211_mgmt *mgmt, size_t len) 1403{ 1404 struct sta_info *sta; 1405 1406 if (len < IEEE80211_HDRLEN + 1) { 1407 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1408 HOSTAPD_LEVEL_DEBUG, 1409 "handle_action - too short payload (len=%lu)", 1410 (unsigned long) len); 1411 return; 1412 } 1413 1414 sta = ap_get_sta(hapd, mgmt->sa); 1415#ifdef CONFIG_IEEE80211W 1416 if (sta && (sta->flags & WLAN_STA_MFP) && 1417 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP) && 1418 robust_action_frame(mgmt->u.action.category))) { 1419 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1420 HOSTAPD_LEVEL_DEBUG, 1421 "Dropped unprotected Robust Action frame from " 1422 "an MFP STA"); 1423 return; 1424 } 1425#endif /* CONFIG_IEEE80211W */ 1426 1427 switch (mgmt->u.action.category) { 1428#ifdef CONFIG_IEEE80211R 1429 case WLAN_ACTION_FT: 1430 { 1431 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 1432 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action " 1433 "frame from unassociated STA " MACSTR, 1434 MAC2STR(mgmt->sa)); 1435 return; 1436 } 1437 1438 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action, 1439 len - IEEE80211_HDRLEN)) 1440 break; 1441 1442 return; 1443 } 1444#endif /* CONFIG_IEEE80211R */ 1445 case WLAN_ACTION_WMM: 1446 hostapd_wmm_action(hapd, mgmt, len); 1447 return; 1448#ifdef CONFIG_IEEE80211W 1449 case WLAN_ACTION_SA_QUERY: 1450 hostapd_sa_query_action(hapd, mgmt, len); 1451 return; 1452#endif /* CONFIG_IEEE80211W */ 1453 case WLAN_ACTION_PUBLIC: 1454 if (hapd->public_action_cb) { 1455 hapd->public_action_cb(hapd->public_action_cb_ctx, 1456 (u8 *) mgmt, len, 1457 hapd->iface->freq); 1458 return; 1459 } 1460 break; 1461 case WLAN_ACTION_VENDOR_SPECIFIC: 1462 if (hapd->vendor_action_cb) { 1463 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx, 1464 (u8 *) mgmt, len, 1465 hapd->iface->freq) == 0) 1466 return; 1467 } 1468 break; 1469 } 1470 1471 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1472 HOSTAPD_LEVEL_DEBUG, 1473 "handle_action - unknown action category %d or invalid " 1474 "frame", 1475 mgmt->u.action.category); 1476 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) && 1477 !(mgmt->sa[0] & 0x01)) { 1478 struct ieee80211_mgmt *resp; 1479 1480 /* 1481 * IEEE 802.11-REVma/D9.0 - 7.3.1.11 1482 * Return the Action frame to the source without change 1483 * except that MSB of the Category set to 1. 1484 */ 1485 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action " 1486 "frame back to sender"); 1487 resp = os_malloc(len); 1488 if (resp == NULL) 1489 return; 1490 os_memcpy(resp, mgmt, len); 1491 os_memcpy(resp->da, resp->sa, ETH_ALEN); 1492 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); 1493 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); 1494 resp->u.action.category |= 0x80; 1495 1496 hostapd_drv_send_mlme(hapd, resp, len); 1497 os_free(resp); 1498 } 1499} 1500 1501 1502/** 1503 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames 1504 * @hapd: hostapd BSS data structure (the BSS to which the management frame was 1505 * sent to) 1506 * @buf: management frame data (starting from IEEE 802.11 header) 1507 * @len: length of frame data in octets 1508 * @fi: meta data about received frame (signal level, etc.) 1509 * 1510 * Process all incoming IEEE 802.11 management frames. This will be called for 1511 * each frame received from the kernel driver through wlan#ap interface. In 1512 * addition, it can be called to re-inserted pending frames (e.g., when using 1513 * external RADIUS server as an MAC ACL). 1514 */ 1515void ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len, 1516 struct hostapd_frame_info *fi) 1517{ 1518 struct ieee80211_mgmt *mgmt; 1519 int broadcast; 1520 u16 fc, stype; 1521 1522 if (len < 24) 1523 return; 1524 1525 mgmt = (struct ieee80211_mgmt *) buf; 1526 fc = le_to_host16(mgmt->frame_control); 1527 stype = WLAN_FC_GET_STYPE(fc); 1528 1529 if (stype == WLAN_FC_STYPE_BEACON) { 1530 handle_beacon(hapd, mgmt, len, fi); 1531 return; 1532 } 1533 1534 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff && 1535 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff && 1536 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff; 1537 1538 if (!broadcast && 1539 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) { 1540 printf("MGMT: BSSID=" MACSTR " not our address\n", 1541 MAC2STR(mgmt->bssid)); 1542 return; 1543 } 1544 1545 1546 if (stype == WLAN_FC_STYPE_PROBE_REQ) { 1547 handle_probe_req(hapd, mgmt, len); 1548 return; 1549 } 1550 1551 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) { 1552 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1553 HOSTAPD_LEVEL_DEBUG, 1554 "MGMT: DA=" MACSTR " not our address", 1555 MAC2STR(mgmt->da)); 1556 return; 1557 } 1558 1559 switch (stype) { 1560 case WLAN_FC_STYPE_AUTH: 1561 wpa_printf(MSG_DEBUG, "mgmt::auth"); 1562 handle_auth(hapd, mgmt, len); 1563 break; 1564 case WLAN_FC_STYPE_ASSOC_REQ: 1565 wpa_printf(MSG_DEBUG, "mgmt::assoc_req"); 1566 handle_assoc(hapd, mgmt, len, 0); 1567 break; 1568 case WLAN_FC_STYPE_REASSOC_REQ: 1569 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req"); 1570 handle_assoc(hapd, mgmt, len, 1); 1571 break; 1572 case WLAN_FC_STYPE_DISASSOC: 1573 wpa_printf(MSG_DEBUG, "mgmt::disassoc"); 1574 handle_disassoc(hapd, mgmt, len); 1575 break; 1576 case WLAN_FC_STYPE_DEAUTH: 1577 wpa_msg(hapd, MSG_DEBUG, "mgmt::deauth"); 1578 handle_deauth(hapd, mgmt, len); 1579 break; 1580 case WLAN_FC_STYPE_ACTION: 1581 wpa_printf(MSG_DEBUG, "mgmt::action"); 1582 handle_action(hapd, mgmt, len); 1583 break; 1584 default: 1585 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, 1586 HOSTAPD_LEVEL_DEBUG, 1587 "unknown mgmt frame subtype %d", stype); 1588 break; 1589 } 1590} 1591 1592 1593static void handle_auth_cb(struct hostapd_data *hapd, 1594 const struct ieee80211_mgmt *mgmt, 1595 size_t len, int ok) 1596{ 1597 u16 auth_alg, auth_transaction, status_code; 1598 struct sta_info *sta; 1599 1600 if (!ok) { 1601 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1602 HOSTAPD_LEVEL_NOTICE, 1603 "did not acknowledge authentication response"); 1604 return; 1605 } 1606 1607 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { 1608 printf("handle_auth_cb - too short payload (len=%lu)\n", 1609 (unsigned long) len); 1610 return; 1611 } 1612 1613 auth_alg = le_to_host16(mgmt->u.auth.auth_alg); 1614 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); 1615 status_code = le_to_host16(mgmt->u.auth.status_code); 1616 1617 sta = ap_get_sta(hapd, mgmt->da); 1618 if (!sta) { 1619 printf("handle_auth_cb: STA " MACSTR " not found\n", 1620 MAC2STR(mgmt->da)); 1621 return; 1622 } 1623 1624 if (status_code == WLAN_STATUS_SUCCESS && 1625 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || 1626 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { 1627 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1628 HOSTAPD_LEVEL_INFO, "authenticated"); 1629 sta->flags |= WLAN_STA_AUTH; 1630 } 1631} 1632 1633 1634static void handle_assoc_cb(struct hostapd_data *hapd, 1635 const struct ieee80211_mgmt *mgmt, 1636 size_t len, int reassoc, int ok) 1637{ 1638 u16 status; 1639 struct sta_info *sta; 1640 int new_assoc = 1; 1641 struct ieee80211_ht_capabilities ht_cap; 1642 1643 if (!ok) { 1644 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, 1645 HOSTAPD_LEVEL_DEBUG, 1646 "did not acknowledge association response"); 1647 return; 1648 } 1649 1650 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) : 1651 sizeof(mgmt->u.assoc_resp))) { 1652 printf("handle_assoc_cb(reassoc=%d) - too short payload " 1653 "(len=%lu)\n", reassoc, (unsigned long) len); 1654 return; 1655 } 1656 1657 if (reassoc) 1658 status = le_to_host16(mgmt->u.reassoc_resp.status_code); 1659 else 1660 status = le_to_host16(mgmt->u.assoc_resp.status_code); 1661 1662 sta = ap_get_sta(hapd, mgmt->da); 1663 if (!sta) { 1664 printf("handle_assoc_cb: STA " MACSTR " not found\n", 1665 MAC2STR(mgmt->da)); 1666 return; 1667 } 1668 1669 if (status != WLAN_STATUS_SUCCESS) 1670 goto fail; 1671 1672 /* Stop previous accounting session, if one is started, and allocate 1673 * new session id for the new session. */ 1674 accounting_sta_stop(hapd, sta); 1675 1676 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1677 HOSTAPD_LEVEL_INFO, 1678 "associated (aid %d)", 1679 sta->aid); 1680 1681 if (sta->flags & WLAN_STA_ASSOC) 1682 new_assoc = 0; 1683 sta->flags |= WLAN_STA_ASSOC; 1684 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) || 1685 sta->auth_alg == WLAN_AUTH_FT) { 1686 /* 1687 * Open, static WEP, or FT protocol; no separate authorization 1688 * step. 1689 */ 1690 ap_sta_set_authorized(hapd, sta, 1); 1691 wpa_msg(hapd->msg_ctx, MSG_INFO, 1692 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr)); 1693#ifdef ANDROID_BRCM_P2P_PATCH 1694 /* Sending the event to parent is required as SSL listens on parent ctrl iface */ 1695 if(hapd->msg_ctx_parent) 1696 wpa_msg(hapd->msg_ctx_parent, MSG_INFO, 1697 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr)); 1698#endif /* ANDROID_BRCM_P2P_PATCH */ 1699 } 1700 1701 if (reassoc) 1702 mlme_reassociate_indication(hapd, sta); 1703 else 1704 mlme_associate_indication(hapd, sta); 1705 1706#ifdef CONFIG_IEEE80211W 1707 sta->sa_query_timed_out = 0; 1708#endif /* CONFIG_IEEE80211W */ 1709 1710 /* 1711 * Remove the STA entry in order to make sure the STA PS state gets 1712 * cleared and configuration gets updated in case of reassociation back 1713 * to the same AP. 1714 */ 1715 hostapd_drv_sta_remove(hapd, sta->addr); 1716 1717#ifdef CONFIG_IEEE80211N 1718 if (sta->flags & WLAN_STA_HT) 1719 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap); 1720#endif /* CONFIG_IEEE80211N */ 1721 1722 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability, 1723 sta->supported_rates, sta->supported_rates_len, 1724 sta->listen_interval, 1725 sta->flags & WLAN_STA_HT ? &ht_cap : NULL)) { 1726 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 1727 HOSTAPD_LEVEL_NOTICE, 1728 "Could not add STA to kernel driver"); 1729 } 1730 1731 if (sta->flags & WLAN_STA_WDS) 1732 hostapd_set_wds_sta(hapd, sta->addr, sta->aid, 1); 1733 1734 if (sta->eapol_sm == NULL) { 1735 /* 1736 * This STA does not use RADIUS server for EAP authentication, 1737 * so bind it to the selected VLAN interface now, since the 1738 * interface selection is not going to change anymore. 1739 */ 1740 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1741 goto fail; 1742 } else if (sta->vlan_id) { 1743 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */ 1744 if (ap_sta_bind_vlan(hapd, sta, 0) < 0) 1745 goto fail; 1746 } 1747 1748 hostapd_set_sta_flags(hapd, sta); 1749 1750 if (sta->auth_alg == WLAN_AUTH_FT) 1751 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); 1752 else 1753 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); 1754 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc); 1755 1756 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); 1757 1758 fail: 1759 /* Copy of the association request is not needed anymore */ 1760 if (sta->last_assoc_req) { 1761 os_free(sta->last_assoc_req); 1762 sta->last_assoc_req = NULL; 1763 } 1764} 1765 1766 1767/** 1768 * ieee802_11_mgmt_cb - Process management frame TX status callback 1769 * @hapd: hostapd BSS data structure (the BSS from which the management frame 1770 * was sent from) 1771 * @buf: management frame data (starting from IEEE 802.11 header) 1772 * @len: length of frame data in octets 1773 * @stype: management frame subtype from frame control field 1774 * @ok: Whether the frame was ACK'ed 1775 */ 1776void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len, 1777 u16 stype, int ok) 1778{ 1779 const struct ieee80211_mgmt *mgmt; 1780 mgmt = (const struct ieee80211_mgmt *) buf; 1781 1782 switch (stype) { 1783 case WLAN_FC_STYPE_AUTH: 1784 wpa_printf(MSG_DEBUG, "mgmt::auth cb"); 1785 handle_auth_cb(hapd, mgmt, len, ok); 1786 break; 1787 case WLAN_FC_STYPE_ASSOC_RESP: 1788 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb"); 1789 handle_assoc_cb(hapd, mgmt, len, 0, ok); 1790 break; 1791 case WLAN_FC_STYPE_REASSOC_RESP: 1792 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb"); 1793 handle_assoc_cb(hapd, mgmt, len, 1, ok); 1794 break; 1795 case WLAN_FC_STYPE_PROBE_RESP: 1796 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb"); 1797 break; 1798 case WLAN_FC_STYPE_DEAUTH: 1799 /* ignore */ 1800 break; 1801 case WLAN_FC_STYPE_ACTION: 1802 wpa_printf(MSG_DEBUG, "mgmt::action cb"); 1803 break; 1804 default: 1805 printf("unknown mgmt cb frame subtype %d\n", stype); 1806 break; 1807 } 1808} 1809 1810 1811int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 1812{ 1813 /* TODO */ 1814 return 0; 1815} 1816 1817 1818int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 1819 char *buf, size_t buflen) 1820{ 1821 /* TODO */ 1822 return 0; 1823} 1824 1825 1826void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr, 1827 const u8 *buf, size_t len, int ack) 1828{ 1829 struct sta_info *sta; 1830 struct hostapd_iface *iface = hapd->iface; 1831 1832 sta = ap_get_sta(hapd, addr); 1833 if (sta == NULL && iface->num_bss > 1) { 1834 size_t j; 1835 for (j = 0; j < iface->num_bss; j++) { 1836 hapd = iface->bss[j]; 1837 sta = ap_get_sta(hapd, addr); 1838 if (sta) 1839 break; 1840 } 1841 } 1842 if (sta == NULL) 1843 return; 1844 if (sta->flags & WLAN_STA_PENDING_POLL) { 1845 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending " 1846 "activity poll", MAC2STR(sta->addr), 1847 ack ? "ACKed" : "did not ACK"); 1848 if (ack) 1849 sta->flags &= ~WLAN_STA_PENDING_POLL; 1850 } 1851 1852 ieee802_1x_tx_status(hapd, sta, buf, len, ack); 1853} 1854 1855 1856void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src, 1857 int wds) 1858{ 1859 struct sta_info *sta; 1860 1861 sta = ap_get_sta(hapd, src); 1862 if (sta && (sta->flags & WLAN_STA_ASSOC)) { 1863 if (wds && !(sta->flags & WLAN_STA_WDS)) { 1864 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for " 1865 "STA " MACSTR " (aid %u)", 1866 MAC2STR(sta->addr), sta->aid); 1867 sta->flags |= WLAN_STA_WDS; 1868 hostapd_set_wds_sta(hapd, sta->addr, sta->aid, 1); 1869 } 1870 return; 1871 } 1872 1873 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA " 1874 MACSTR, MAC2STR(src)); 1875 if (src[0] & 0x01) { 1876 /* Broadcast bit set in SA?! Ignore the frame silently. */ 1877 return; 1878 } 1879 1880 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) { 1881 wpa_printf(MSG_DEBUG, "Association Response to the STA has " 1882 "already been sent, but no TX status yet known - " 1883 "ignore Class 3 frame issue with " MACSTR, 1884 MAC2STR(src)); 1885 return; 1886 } 1887 1888 if (sta && (sta->flags & WLAN_STA_AUTH)) 1889 hostapd_drv_sta_disassoc( 1890 hapd, src, 1891 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 1892 else 1893 hostapd_drv_sta_deauth( 1894 hapd, src, 1895 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); 1896} 1897 1898 1899#endif /* CONFIG_NATIVE_WINDOWS */ 1900