sme.c revision a54fa5fb807eaeff45464139b5a7759f060cec68
1/* 2 * wpa_supplicant - SME 3 * Copyright (c) 2009-2012, 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 "includes.h" 10 11#include "common.h" 12#include "utils/eloop.h" 13#include "common/ieee802_11_defs.h" 14#include "common/ieee802_11_common.h" 15#include "eapol_supp/eapol_supp_sm.h" 16#include "common/wpa_common.h" 17#include "common/sae.h" 18#include "rsn_supp/wpa.h" 19#include "rsn_supp/pmksa_cache.h" 20#include "config.h" 21#include "wpa_supplicant_i.h" 22#include "driver_i.h" 23#include "wpas_glue.h" 24#include "wps_supplicant.h" 25#include "p2p_supplicant.h" 26#include "notify.h" 27#include "bss.h" 28#include "scan.h" 29#include "sme.h" 30#include "hs20_supplicant.h" 31 32#define SME_AUTH_TIMEOUT 5 33#define SME_ASSOC_TIMEOUT 5 34 35static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx); 36static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx); 37static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx); 38#ifdef CONFIG_IEEE80211W 39static void sme_stop_sa_query(struct wpa_supplicant *wpa_s); 40#endif /* CONFIG_IEEE80211W */ 41 42 43#ifdef CONFIG_SAE 44 45static int index_within_array(const int *array, int idx) 46{ 47 int i; 48 for (i = 0; i < idx; i++) { 49 if (array[i] == -1) 50 return 0; 51 } 52 return 1; 53} 54 55 56static int sme_set_sae_group(struct wpa_supplicant *wpa_s) 57{ 58 int *groups = wpa_s->conf->sae_groups; 59 int default_groups[] = { 19, 20, 21, 25, 26 }; 60 61 if (!groups) 62 groups = default_groups; 63 64 /* Configuration may have changed, so validate current index */ 65 if (!index_within_array(groups, wpa_s->sme.sae_group_index)) 66 return -1; 67 68 for (;;) { 69 int group = groups[wpa_s->sme.sae_group_index]; 70 if (group < 0) 71 break; 72 if (sae_set_group(&wpa_s->sme.sae, group) == 0) { 73 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d", 74 wpa_s->sme.sae.group); 75 return 0; 76 } 77 wpa_s->sme.sae_group_index++; 78 } 79 80 return -1; 81} 82 83 84static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s, 85 struct wpa_ssid *ssid, 86 const u8 *bssid) 87{ 88 struct wpabuf *buf; 89 size_t len; 90 91 if (ssid->passphrase == NULL) { 92 wpa_printf(MSG_DEBUG, "SAE: No password available"); 93 return NULL; 94 } 95 96 if (sme_set_sae_group(wpa_s) < 0) { 97 wpa_printf(MSG_DEBUG, "SAE: Failed to select group"); 98 return NULL; 99 } 100 101 if (sae_prepare_commit(wpa_s->own_addr, bssid, 102 (u8 *) ssid->passphrase, 103 os_strlen(ssid->passphrase), 104 &wpa_s->sme.sae) < 0) { 105 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); 106 return NULL; 107 } 108 109 len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0; 110 buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len); 111 if (buf == NULL) 112 return NULL; 113 114 wpabuf_put_le16(buf, 1); /* Transaction seq# */ 115 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); 116 sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token); 117 118 return buf; 119} 120 121 122static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s) 123{ 124 struct wpabuf *buf; 125 126 buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN); 127 if (buf == NULL) 128 return NULL; 129 130 wpabuf_put_le16(buf, 2); /* Transaction seq# */ 131 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); 132 sae_write_confirm(&wpa_s->sme.sae, buf); 133 134 return buf; 135} 136 137#endif /* CONFIG_SAE */ 138 139 140static void sme_send_authentication(struct wpa_supplicant *wpa_s, 141 struct wpa_bss *bss, struct wpa_ssid *ssid, 142 int start) 143{ 144 struct wpa_driver_auth_params params; 145 struct wpa_ssid *old_ssid; 146#ifdef CONFIG_IEEE80211R 147 const u8 *ie; 148#endif /* CONFIG_IEEE80211R */ 149#ifdef CONFIG_IEEE80211R 150 const u8 *md = NULL; 151#endif /* CONFIG_IEEE80211R */ 152 int i, bssid_changed; 153 struct wpabuf *resp = NULL; 154 u8 ext_capab[10]; 155 int ext_capab_len; 156 157 if (bss == NULL) { 158 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for " 159 "the network"); 160 return; 161 } 162 163 wpa_s->current_bss = bss; 164 165 os_memset(¶ms, 0, sizeof(params)); 166 wpa_s->reassociate = 0; 167 168 params.freq = bss->freq; 169 params.bssid = bss->bssid; 170 params.ssid = bss->ssid; 171 params.ssid_len = bss->ssid_len; 172 params.p2p = ssid->p2p_group; 173 174 if (wpa_s->sme.ssid_len != params.ssid_len || 175 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0) 176 wpa_s->sme.prev_bssid_set = 0; 177 178 wpa_s->sme.freq = params.freq; 179 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len); 180 wpa_s->sme.ssid_len = params.ssid_len; 181 182 params.auth_alg = WPA_AUTH_ALG_OPEN; 183#ifdef IEEE8021X_EAPOL 184 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 185 if (ssid->leap) { 186 if (ssid->non_leap == 0) 187 params.auth_alg = WPA_AUTH_ALG_LEAP; 188 else 189 params.auth_alg |= WPA_AUTH_ALG_LEAP; 190 } 191 } 192#endif /* IEEE8021X_EAPOL */ 193 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", 194 params.auth_alg); 195 if (ssid->auth_alg) { 196 params.auth_alg = ssid->auth_alg; 197 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: " 198 "0x%x", params.auth_alg); 199 } 200#ifdef CONFIG_SAE 201 if (wpa_key_mgmt_sae(ssid->key_mgmt)) { 202 const u8 *rsn; 203 struct wpa_ie_data ied; 204 205 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 206 if (rsn && 207 wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) { 208 if (wpa_key_mgmt_sae(ied.key_mgmt)) { 209 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg"); 210 params.auth_alg = WPA_AUTH_ALG_SAE; 211 } 212 } 213 } 214#endif /* CONFIG_SAE */ 215 216 for (i = 0; i < NUM_WEP_KEYS; i++) { 217 if (ssid->wep_key_len[i]) 218 params.wep_key[i] = ssid->wep_key[i]; 219 params.wep_key_len[i] = ssid->wep_key_len[i]; 220 } 221 params.wep_tx_keyidx = ssid->wep_tx_keyidx; 222 223 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 224 os_memset(wpa_s->bssid, 0, ETH_ALEN); 225 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN); 226 if (bssid_changed) 227 wpas_notify_bssid_changed(wpa_s); 228 229 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) || 230 wpa_bss_get_ie(bss, WLAN_EID_RSN)) && 231 wpa_key_mgmt_wpa(ssid->key_mgmt)) { 232 int try_opportunistic; 233 try_opportunistic = (ssid->proactive_key_caching < 0 ? 234 wpa_s->conf->okc : 235 ssid->proactive_key_caching) && 236 (ssid->proto & WPA_PROTO_RSN); 237 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, 238 wpa_s->current_ssid, 239 try_opportunistic) == 0) 240 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1); 241 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 242 if (wpa_supplicant_set_suites(wpa_s, bss, ssid, 243 wpa_s->sme.assoc_req_ie, 244 &wpa_s->sme.assoc_req_ie_len)) { 245 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 246 "key management and encryption suites"); 247 return; 248 } 249 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && 250 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) { 251 /* 252 * Both WPA and non-WPA IEEE 802.1X enabled in configuration - 253 * use non-WPA since the scan results did not indicate that the 254 * AP is using WPA or WPA2. 255 */ 256 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 257 wpa_s->sme.assoc_req_ie_len = 0; 258 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) { 259 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 260 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, 261 wpa_s->sme.assoc_req_ie, 262 &wpa_s->sme.assoc_req_ie_len)) { 263 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 264 "key management and encryption suites (no " 265 "scan results)"); 266 return; 267 } 268#ifdef CONFIG_WPS 269 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 270 struct wpabuf *wps_ie; 271 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid)); 272 if (wps_ie && wpabuf_len(wps_ie) <= 273 sizeof(wpa_s->sme.assoc_req_ie)) { 274 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie); 275 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie), 276 wpa_s->sme.assoc_req_ie_len); 277 } else 278 wpa_s->sme.assoc_req_ie_len = 0; 279 wpabuf_free(wps_ie); 280 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 281#endif /* CONFIG_WPS */ 282 } else { 283 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 284 wpa_s->sme.assoc_req_ie_len = 0; 285 } 286 287#ifdef CONFIG_IEEE80211R 288 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN); 289 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN) 290 md = ie + 2; 291 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0); 292 if (md) { 293 /* Prepare for the next transition */ 294 wpa_ft_prepare_auth_request(wpa_s->wpa, ie); 295 } 296 297 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) { 298 if (wpa_s->sme.assoc_req_ie_len + 5 < 299 sizeof(wpa_s->sme.assoc_req_ie)) { 300 struct rsn_mdie *mdie; 301 u8 *pos = wpa_s->sme.assoc_req_ie + 302 wpa_s->sme.assoc_req_ie_len; 303 *pos++ = WLAN_EID_MOBILITY_DOMAIN; 304 *pos++ = sizeof(*mdie); 305 mdie = (struct rsn_mdie *) pos; 306 os_memcpy(mdie->mobility_domain, md, 307 MOBILITY_DOMAIN_ID_LEN); 308 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN]; 309 wpa_s->sme.assoc_req_ie_len += 5; 310 } 311 312 if (wpa_s->sme.ft_used && 313 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 && 314 wpa_sm_has_ptk(wpa_s->wpa)) { 315 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT " 316 "over-the-air"); 317 params.auth_alg = WPA_AUTH_ALG_FT; 318 params.ie = wpa_s->sme.ft_ies; 319 params.ie_len = wpa_s->sme.ft_ies_len; 320 } 321 } 322#endif /* CONFIG_IEEE80211R */ 323 324#ifdef CONFIG_IEEE80211W 325 wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ? 326 wpa_s->conf->pmf : ssid->ieee80211w; 327 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) { 328 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 329 struct wpa_ie_data _ie; 330 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 && 331 _ie.capabilities & 332 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) { 333 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports " 334 "MFP: require MFP"); 335 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED; 336 } 337 } 338#endif /* CONFIG_IEEE80211W */ 339 340#ifdef CONFIG_P2P 341 if (wpa_s->global->p2p) { 342 u8 *pos; 343 size_t len; 344 int res; 345 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; 346 len = sizeof(wpa_s->sme.assoc_req_ie) - 347 wpa_s->sme.assoc_req_ie_len; 348 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, 349 ssid->p2p_group); 350 if (res >= 0) 351 wpa_s->sme.assoc_req_ie_len += res; 352 } 353#endif /* CONFIG_P2P */ 354 355#ifdef CONFIG_HS20 356 if (wpa_s->conf->hs20) { 357 struct wpabuf *hs20; 358 hs20 = wpabuf_alloc(20); 359 if (hs20) { 360 wpas_hs20_add_indication(hs20); 361 os_memcpy(wpa_s->sme.assoc_req_ie + 362 wpa_s->sme.assoc_req_ie_len, 363 wpabuf_head(hs20), wpabuf_len(hs20)); 364 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20); 365 wpabuf_free(hs20); 366 } 367 } 368#endif /* CONFIG_HS20 */ 369 370 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab); 371 if (ext_capab_len > 0) { 372 u8 *pos = wpa_s->sme.assoc_req_ie; 373 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN) 374 pos += 2 + pos[1]; 375 os_memmove(pos + ext_capab_len, pos, 376 wpa_s->sme.assoc_req_ie_len - 377 (pos - wpa_s->sme.assoc_req_ie)); 378 wpa_s->sme.assoc_req_ie_len += ext_capab_len; 379 os_memcpy(pos, ext_capab, ext_capab_len); 380 } 381 382#ifdef CONFIG_SAE 383 if (params.auth_alg == WPA_AUTH_ALG_SAE) { 384 if (start) 385 resp = sme_auth_build_sae_commit(wpa_s, ssid, 386 bss->bssid); 387 else 388 resp = sme_auth_build_sae_confirm(wpa_s); 389 if (resp == NULL) 390 return; 391 params.sae_data = wpabuf_head(resp); 392 params.sae_data_len = wpabuf_len(resp); 393 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED; 394 } 395#endif /* CONFIG_SAE */ 396 397 wpa_supplicant_cancel_sched_scan(wpa_s); 398 wpa_supplicant_cancel_scan(wpa_s); 399 400 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR 401 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 402 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq); 403 404 wpa_clear_keys(wpa_s, bss->bssid); 405 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 406 old_ssid = wpa_s->current_ssid; 407 wpa_s->current_ssid = ssid; 408 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid); 409 wpa_supplicant_initiate_eapol(wpa_s); 410 if (old_ssid != wpa_s->current_ssid) 411 wpas_notify_network_changed(wpa_s); 412 413 wpa_s->sme.auth_alg = params.auth_alg; 414 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) { 415 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the " 416 "driver failed"); 417 wpas_connection_failed(wpa_s, bss->bssid); 418 wpa_supplicant_mark_disassoc(wpa_s); 419 wpabuf_free(resp); 420 return; 421 } 422 423 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 424 NULL); 425 426 /* 427 * Association will be started based on the authentication event from 428 * the driver. 429 */ 430 431 wpabuf_free(resp); 432} 433 434 435void sme_authenticate(struct wpa_supplicant *wpa_s, 436 struct wpa_bss *bss, struct wpa_ssid *ssid) 437{ 438#ifdef CONFIG_SAE 439 wpa_s->sme.sae.state = SAE_NOTHING; 440 wpa_s->sme.sae.send_confirm = 0; 441#endif /* CONFIG_SAE */ 442 sme_send_authentication(wpa_s, bss, ssid, 1); 443} 444 445 446#ifdef CONFIG_SAE 447 448static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction, 449 u16 status_code, const u8 *data, size_t len) 450{ 451 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u " 452 "status code %u", auth_transaction, status_code); 453 454 if (auth_transaction == 1 && 455 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ && 456 wpa_s->sme.sae.state == SAE_COMMITTED && 457 wpa_s->current_bss && wpa_s->current_ssid) { 458 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token " 459 "requested"); 460 wpabuf_free(wpa_s->sme.sae_token); 461 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len); 462 sme_send_authentication(wpa_s, wpa_s->current_bss, 463 wpa_s->current_ssid, 1); 464 return 0; 465 } 466 467 if (auth_transaction == 1 && 468 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED && 469 wpa_s->sme.sae.state == SAE_COMMITTED && 470 wpa_s->current_bss && wpa_s->current_ssid) { 471 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported"); 472 wpa_s->sme.sae_group_index++; 473 if (sme_set_sae_group(wpa_s) < 0) 474 return -1; /* no other groups enabled */ 475 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group"); 476 sme_send_authentication(wpa_s, wpa_s->current_bss, 477 wpa_s->current_ssid, 1); 478 return 0; 479 } 480 481 if (status_code != WLAN_STATUS_SUCCESS) 482 return -1; 483 484 if (auth_transaction == 1) { 485 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit"); 486 if (wpa_s->current_bss == NULL || 487 wpa_s->current_ssid == NULL) 488 return -1; 489 if (wpa_s->sme.sae.state != SAE_COMMITTED) 490 return -1; 491 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL, 492 wpa_s->conf->sae_groups) != 493 WLAN_STATUS_SUCCESS) 494 return -1; 495 496 if (sae_process_commit(&wpa_s->sme.sae) < 0) { 497 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer " 498 "commit"); 499 return -1; 500 } 501 502 wpabuf_free(wpa_s->sme.sae_token); 503 wpa_s->sme.sae_token = NULL; 504 sme_send_authentication(wpa_s, wpa_s->current_bss, 505 wpa_s->current_ssid, 0); 506 return 0; 507 } else if (auth_transaction == 2) { 508 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm"); 509 if (wpa_s->sme.sae.state != SAE_CONFIRMED) 510 return -1; 511 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0) 512 return -1; 513 wpa_s->sme.sae.state = SAE_ACCEPTED; 514 sae_clear_temp_data(&wpa_s->sme.sae); 515 return 1; 516 } 517 518 return -1; 519} 520#endif /* CONFIG_SAE */ 521 522 523void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data) 524{ 525 struct wpa_ssid *ssid = wpa_s->current_ssid; 526 527 if (ssid == NULL) { 528 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 529 "when network is not selected"); 530 return; 531 } 532 533 if (wpa_s->wpa_state != WPA_AUTHENTICATING) { 534 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 535 "when not in authenticating state"); 536 return; 537 } 538 539 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) { 540 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with " 541 "unexpected peer " MACSTR, 542 MAC2STR(data->auth.peer)); 543 return; 544 } 545 546 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR 547 " auth_type=%d auth_transaction=%d status_code=%d", 548 MAC2STR(data->auth.peer), data->auth.auth_type, 549 data->auth.auth_transaction, data->auth.status_code); 550 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs", 551 data->auth.ies, data->auth.ies_len); 552 553 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 554 555#ifdef CONFIG_SAE 556 if (data->auth.auth_type == WLAN_AUTH_SAE) { 557 int res; 558 res = sme_sae_auth(wpa_s, data->auth.auth_transaction, 559 data->auth.status_code, data->auth.ies, 560 data->auth.ies_len); 561 if (res < 0) { 562 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 563 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 564 565 } 566 if (res != 1) 567 return; 568 569 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for " 570 "4-way handshake"); 571 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN); 572 } 573#endif /* CONFIG_SAE */ 574 575 if (data->auth.status_code != WLAN_STATUS_SUCCESS) { 576 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status " 577 "code %d)", data->auth.status_code); 578 579 if (data->auth.status_code != 580 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG || 581 wpa_s->sme.auth_alg == data->auth.auth_type || 582 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) { 583 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 584 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 585 return; 586 } 587 588 switch (data->auth.auth_type) { 589 case WLAN_AUTH_OPEN: 590 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED; 591 592 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth"); 593 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 594 wpa_s->current_ssid); 595 return; 596 597 case WLAN_AUTH_SHARED_KEY: 598 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP; 599 600 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth"); 601 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 602 wpa_s->current_ssid); 603 return; 604 605 default: 606 return; 607 } 608 } 609 610#ifdef CONFIG_IEEE80211R 611 if (data->auth.auth_type == WLAN_AUTH_FT) { 612 union wpa_event_data edata; 613 os_memset(&edata, 0, sizeof(edata)); 614 edata.ft_ies.ies = data->auth.ies; 615 edata.ft_ies.ies_len = data->auth.ies_len; 616 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN); 617 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata); 618 } 619#endif /* CONFIG_IEEE80211R */ 620 621 sme_associate(wpa_s, ssid->mode, data->auth.peer, 622 data->auth.auth_type); 623} 624 625 626void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode, 627 const u8 *bssid, u16 auth_type) 628{ 629 struct wpa_driver_associate_params params; 630 struct ieee802_11_elems elems; 631#ifdef CONFIG_HT_OVERRIDES 632 struct ieee80211_ht_capabilities htcaps; 633 struct ieee80211_ht_capabilities htcaps_mask; 634#endif /* CONFIG_HT_OVERRIDES */ 635 636 os_memset(¶ms, 0, sizeof(params)); 637 params.bssid = bssid; 638 params.ssid = wpa_s->sme.ssid; 639 params.ssid_len = wpa_s->sme.ssid_len; 640 params.freq = wpa_s->sme.freq; 641 params.bg_scan_period = wpa_s->current_ssid ? 642 wpa_s->current_ssid->bg_scan_period : -1; 643 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ? 644 wpa_s->sme.assoc_req_ie : NULL; 645 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len; 646 params.pairwise_suite = 647 wpa_cipher_to_suite_driver(wpa_s->pairwise_cipher); 648 params.group_suite = wpa_cipher_to_suite_driver(wpa_s->group_cipher); 649#ifdef CONFIG_HT_OVERRIDES 650 os_memset(&htcaps, 0, sizeof(htcaps)); 651 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask)); 652 params.htcaps = (u8 *) &htcaps; 653 params.htcaps_mask = (u8 *) &htcaps_mask; 654 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); 655#endif /* CONFIG_HT_OVERRIDES */ 656#ifdef CONFIG_IEEE80211R 657 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) { 658 params.wpa_ie = wpa_s->sme.ft_ies; 659 params.wpa_ie_len = wpa_s->sme.ft_ies_len; 660 } 661#endif /* CONFIG_IEEE80211R */ 662 params.mode = mode; 663 params.mgmt_frame_protection = wpa_s->sme.mfp; 664 if (wpa_s->sme.prev_bssid_set) 665 params.prev_bssid = wpa_s->sme.prev_bssid; 666 667 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR 668 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 669 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "", 670 params.freq); 671 672 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING); 673 674 if (params.wpa_ie == NULL || 675 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0) 676 < 0) { 677 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!"); 678 os_memset(&elems, 0, sizeof(elems)); 679 } 680 if (elems.rsn_ie) { 681 params.wpa_proto = WPA_PROTO_RSN; 682 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2, 683 elems.rsn_ie_len + 2); 684 } else if (elems.wpa_ie) { 685 params.wpa_proto = WPA_PROTO_WPA; 686 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2, 687 elems.wpa_ie_len + 2); 688 } else 689 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 690 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group) 691 params.p2p = 1; 692 693 if (wpa_s->parent->set_sta_uapsd) 694 params.uapsd = wpa_s->parent->sta_uapsd; 695 else 696 params.uapsd = -1; 697 698 if (wpa_drv_associate(wpa_s, ¶ms) < 0) { 699 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the " 700 "driver failed"); 701 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 702 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 703 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 704 return; 705 } 706 707 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s, 708 NULL); 709} 710 711 712int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md, 713 const u8 *ies, size_t ies_len) 714{ 715 if (md == NULL || ies == NULL) { 716 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain"); 717 os_free(wpa_s->sme.ft_ies); 718 wpa_s->sme.ft_ies = NULL; 719 wpa_s->sme.ft_ies_len = 0; 720 wpa_s->sme.ft_used = 0; 721 return 0; 722 } 723 724 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); 725 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len); 726 os_free(wpa_s->sme.ft_ies); 727 wpa_s->sme.ft_ies = os_malloc(ies_len); 728 if (wpa_s->sme.ft_ies == NULL) 729 return -1; 730 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len); 731 wpa_s->sme.ft_ies_len = ies_len; 732 return 0; 733} 734 735 736static void sme_deauth(struct wpa_supplicant *wpa_s) 737{ 738 int bssid_changed; 739 740 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 741 742 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, 743 WLAN_REASON_DEAUTH_LEAVING) < 0) { 744 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver " 745 "failed"); 746 } 747 wpa_s->sme.prev_bssid_set = 0; 748 749 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 750 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 751 os_memset(wpa_s->bssid, 0, ETH_ALEN); 752 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 753 if (bssid_changed) 754 wpas_notify_bssid_changed(wpa_s); 755} 756 757 758void sme_event_assoc_reject(struct wpa_supplicant *wpa_s, 759 union wpa_event_data *data) 760{ 761 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: " 762 "status code %d", MAC2STR(wpa_s->pending_bssid), 763 data->assoc_reject.status_code); 764 765 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 766 767 /* 768 * For now, unconditionally terminate the previous authentication. In 769 * theory, this should not be needed, but mac80211 gets quite confused 770 * if the authentication is left pending.. Some roaming cases might 771 * benefit from using the previous authentication, so this could be 772 * optimized in the future. 773 */ 774 sme_deauth(wpa_s); 775} 776 777 778void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s, 779 union wpa_event_data *data) 780{ 781 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out"); 782 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 783 wpa_supplicant_mark_disassoc(wpa_s); 784} 785 786 787void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s, 788 union wpa_event_data *data) 789{ 790 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out"); 791 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 792 wpa_supplicant_mark_disassoc(wpa_s); 793} 794 795 796void sme_event_disassoc(struct wpa_supplicant *wpa_s, 797 union wpa_event_data *data) 798{ 799 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received"); 800 if (wpa_s->sme.prev_bssid_set) { 801 /* 802 * cfg80211/mac80211 can get into somewhat confused state if 803 * the AP only disassociates us and leaves us in authenticated 804 * state. For now, force the state to be cleared to avoid 805 * confusing errors if we try to associate with the AP again. 806 */ 807 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear " 808 "driver state"); 809 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid, 810 WLAN_REASON_DEAUTH_LEAVING); 811 } 812} 813 814 815static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx) 816{ 817 struct wpa_supplicant *wpa_s = eloop_ctx; 818 if (wpa_s->wpa_state == WPA_AUTHENTICATING) { 819 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout"); 820 sme_deauth(wpa_s); 821 } 822} 823 824 825static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx) 826{ 827 struct wpa_supplicant *wpa_s = eloop_ctx; 828 if (wpa_s->wpa_state == WPA_ASSOCIATING) { 829 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout"); 830 sme_deauth(wpa_s); 831 } 832} 833 834 835void sme_state_changed(struct wpa_supplicant *wpa_s) 836{ 837 /* Make sure timers are cleaned up appropriately. */ 838 if (wpa_s->wpa_state != WPA_ASSOCIATING) 839 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 840 if (wpa_s->wpa_state != WPA_AUTHENTICATING) 841 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 842} 843 844 845void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s, 846 const u8 *prev_pending_bssid) 847{ 848 /* 849 * mac80211-workaround to force deauth on failed auth cmd, 850 * requires us to remain in authenticating state to allow the 851 * second authentication attempt to be continued properly. 852 */ 853 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication " 854 "to proceed after disconnection event"); 855 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 856 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN); 857 858 /* 859 * Re-arm authentication timer in case auth fails for whatever reason. 860 */ 861 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 862 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 863 NULL); 864} 865 866 867void sme_deinit(struct wpa_supplicant *wpa_s) 868{ 869 os_free(wpa_s->sme.ft_ies); 870 wpa_s->sme.ft_ies = NULL; 871 wpa_s->sme.ft_ies_len = 0; 872#ifdef CONFIG_IEEE80211W 873 sme_stop_sa_query(wpa_s); 874#endif /* CONFIG_IEEE80211W */ 875#ifdef CONFIG_SAE 876 wpabuf_free(wpa_s->sme.sae_token); 877 wpa_s->sme.sae_token = NULL; 878 sae_clear_data(&wpa_s->sme.sae); 879#endif /* CONFIG_SAE */ 880 881 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 882 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 883 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 884} 885 886 887static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s, 888 const u8 *chan_list, u8 num_channels, 889 u8 num_intol) 890{ 891 struct ieee80211_2040_bss_coex_ie *bc_ie; 892 struct ieee80211_2040_intol_chan_report *ic_report; 893 struct wpabuf *buf; 894 895 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR, 896 MAC2STR(wpa_s->bssid)); 897 898 buf = wpabuf_alloc(2 + /* action.category + action_code */ 899 sizeof(struct ieee80211_2040_bss_coex_ie) + 900 sizeof(struct ieee80211_2040_intol_chan_report) + 901 num_channels); 902 if (buf == NULL) 903 return; 904 905 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC); 906 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX); 907 908 bc_ie = wpabuf_put(buf, sizeof(*bc_ie)); 909 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE; 910 bc_ie->length = 1; 911 if (num_intol) 912 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ; 913 914 if (num_channels > 0) { 915 ic_report = wpabuf_put(buf, sizeof(*ic_report)); 916 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT; 917 ic_report->length = num_channels + 1; 918 ic_report->op_class = 0; 919 os_memcpy(wpabuf_put(buf, num_channels), chan_list, 920 num_channels); 921 } 922 923 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 924 wpa_s->own_addr, wpa_s->bssid, 925 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) { 926 wpa_msg(wpa_s, MSG_INFO, 927 "SME: Failed to send 20/40 BSS Coexistence frame"); 928 } 929 930 wpabuf_free(buf); 931} 932 933 934/** 935 * enum wpas_band - Frequency band 936 * @WPAS_BAND_2GHZ: 2.4 GHz ISM band 937 * @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz) 938 */ 939enum wpas_band { 940 WPAS_BAND_2GHZ, 941 WPAS_BAND_5GHZ, 942 WPAS_BAND_INVALID 943}; 944 945/** 946 * freq_to_channel - Convert frequency into channel info 947 * @channel: Buffer for returning channel number 948 * Returns: Band (2 or 5 GHz) 949 */ 950static enum wpas_band freq_to_channel(int freq, u8 *channel) 951{ 952 enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ; 953 u8 chan = 0; 954 955 if (freq >= 2412 && freq <= 2472) 956 chan = (freq - 2407) / 5; 957 else if (freq == 2484) 958 chan = 14; 959 else if (freq >= 5180 && freq <= 5805) 960 chan = (freq - 5000) / 5; 961 962 *channel = chan; 963 return band; 964} 965 966 967int sme_proc_obss_scan(struct wpa_supplicant *wpa_s) 968{ 969 struct wpa_bss *bss; 970 const u8 *ie; 971 u16 ht_cap; 972 u8 chan_list[P2P_MAX_CHANNELS], channel; 973 u8 num_channels = 0, num_intol = 0, i; 974 975 if (!wpa_s->sme.sched_obss_scan) 976 return 0; 977 978 wpa_s->sme.sched_obss_scan = 0; 979 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED) 980 return 1; 981 982 /* 983 * Check whether AP uses regulatory triplet or channel triplet in 984 * country info. Right now the operating class of the BSS channel 985 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12), 986 * based on the assumption that operating class triplet is not used in 987 * beacon frame. If the First Channel Number/Operating Extension 988 * Identifier octet has a positive integer value of 201 or greater, 989 * then its operating class triplet. 990 * 991 * TODO: If Supported Operating Classes element is present in beacon 992 * frame, have to lookup operating class in Annex E and fill them in 993 * 2040 coex frame. 994 */ 995 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); 996 if (ie && (ie[1] >= 6) && (ie[5] >= 201)) 997 return 1; 998 999 os_memset(chan_list, 0, sizeof(chan_list)); 1000 1001 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 1002 /* Skip other band bss */ 1003 if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ) 1004 continue; 1005 1006 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP); 1007 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0; 1008 1009 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) { 1010 /* Check whether the channel is already considered */ 1011 for (i = 0; i < num_channels; i++) { 1012 if (channel == chan_list[i]) 1013 break; 1014 } 1015 if (i != num_channels) 1016 continue; 1017 1018 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT) 1019 num_intol++; 1020 1021 chan_list[num_channels++] = channel; 1022 } 1023 } 1024 1025 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol); 1026 return 1; 1027} 1028 1029 1030static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes, 1031 u16 num_modes, 1032 enum hostapd_hw_mode mode) 1033{ 1034 u16 i; 1035 1036 for (i = 0; i < num_modes; i++) { 1037 if (modes[i].mode == mode) 1038 return &modes[i]; 1039 } 1040 1041 return NULL; 1042} 1043 1044 1045static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s, 1046 enum hostapd_hw_mode band, 1047 struct wpa_driver_scan_params *params) 1048{ 1049 /* Include only supported channels for the specified band */ 1050 struct hostapd_hw_modes *mode; 1051 int count, i; 1052 1053 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band); 1054 if (mode == NULL) { 1055 /* No channels supported in this band - use empty list */ 1056 params->freqs = os_zalloc(sizeof(int)); 1057 return; 1058 } 1059 1060 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); 1061 if (params->freqs == NULL) 1062 return; 1063 for (count = 0, i = 0; i < mode->num_channels; i++) { 1064 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) 1065 continue; 1066 params->freqs[count++] = mode->channels[i].freq; 1067 } 1068} 1069 1070 1071static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1072{ 1073 struct wpa_supplicant *wpa_s = eloop_ctx; 1074 struct wpa_driver_scan_params params; 1075 1076 if (!wpa_s->current_bss) { 1077 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request"); 1078 return; 1079 } 1080 1081 os_memset(¶ms, 0, sizeof(params)); 1082 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, ¶ms); 1083 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan"); 1084 1085 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms)) 1086 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan"); 1087 else 1088 wpa_s->sme.sched_obss_scan = 1; 1089 os_free(params.freqs); 1090 1091 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 1092 sme_obss_scan_timeout, wpa_s, NULL); 1093} 1094 1095 1096void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable) 1097{ 1098 const u8 *ie; 1099 struct wpa_bss *bss = wpa_s->current_bss; 1100 struct wpa_ssid *ssid = wpa_s->current_ssid; 1101 struct hostapd_hw_modes *hw_mode = NULL; 1102 int i; 1103 1104 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 1105 wpa_s->sme.sched_obss_scan = 0; 1106 if (!enable) 1107 return; 1108 1109 /* 1110 * Schedule OBSS scan if driver is using station SME in wpa_supplicant 1111 * or it expects OBSS scan to be performed by wpa_supplicant. 1112 */ 1113 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || 1114 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) || 1115 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA) 1116 return; 1117 1118 if (!wpa_s->hw.modes) 1119 return; 1120 1121 /* only HT caps in 11g mode are relevant */ 1122 for (i = 0; i < wpa_s->hw.num_modes; i++) { 1123 hw_mode = &wpa_s->hw.modes[i]; 1124 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G) 1125 break; 1126 } 1127 1128 /* Driver does not support HT40 for 11g or doesn't have 11g. */ 1129 if (i == wpa_s->hw.num_modes || !hw_mode || 1130 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 1131 return; 1132 1133 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500) 1134 return; /* Not associated on 2.4 GHz band */ 1135 1136 /* Check whether AP supports HT40 */ 1137 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP); 1138 if (!ie || ie[1] < 2 || 1139 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 1140 return; /* AP does not support HT40 */ 1141 1142 ie = wpa_bss_get_ie(wpa_s->current_bss, 1143 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS); 1144 if (!ie || ie[1] < 14) 1145 return; /* AP does not request OBSS scans */ 1146 1147 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6); 1148 if (wpa_s->sme.obss_scan_int < 10) { 1149 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u " 1150 "replaced with the minimum 10 sec", 1151 wpa_s->sme.obss_scan_int); 1152 wpa_s->sme.obss_scan_int = 10; 1153 } 1154 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec", 1155 wpa_s->sme.obss_scan_int); 1156 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 1157 sme_obss_scan_timeout, wpa_s, NULL); 1158} 1159 1160 1161#ifdef CONFIG_IEEE80211W 1162 1163static const unsigned int sa_query_max_timeout = 1000; 1164static const unsigned int sa_query_retry_timeout = 201; 1165 1166static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s) 1167{ 1168 u32 tu; 1169 struct os_time now, passed; 1170 os_get_time(&now); 1171 os_time_sub(&now, &wpa_s->sme.sa_query_start, &passed); 1172 tu = (passed.sec * 1000000 + passed.usec) / 1024; 1173 if (sa_query_max_timeout < tu) { 1174 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out"); 1175 sme_stop_sa_query(wpa_s); 1176 wpa_supplicant_deauthenticate( 1177 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID); 1178 return 1; 1179 } 1180 1181 return 0; 1182} 1183 1184 1185static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s, 1186 const u8 *trans_id) 1187{ 1188 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN]; 1189 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to " 1190 MACSTR, MAC2STR(wpa_s->bssid)); 1191 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID", 1192 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1193 req[0] = WLAN_ACTION_SA_QUERY; 1194 req[1] = WLAN_SA_QUERY_REQUEST; 1195 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1196 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 1197 wpa_s->own_addr, wpa_s->bssid, 1198 req, sizeof(req), 0) < 0) 1199 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query " 1200 "Request"); 1201} 1202 1203 1204static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx) 1205{ 1206 struct wpa_supplicant *wpa_s = eloop_ctx; 1207 unsigned int timeout, sec, usec; 1208 u8 *trans_id, *nbuf; 1209 1210 if (wpa_s->sme.sa_query_count > 0 && 1211 sme_check_sa_query_timeout(wpa_s)) 1212 return; 1213 1214 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id, 1215 wpa_s->sme.sa_query_count + 1, 1216 WLAN_SA_QUERY_TR_ID_LEN); 1217 if (nbuf == NULL) 1218 return; 1219 if (wpa_s->sme.sa_query_count == 0) { 1220 /* Starting a new SA Query procedure */ 1221 os_get_time(&wpa_s->sme.sa_query_start); 1222 } 1223 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN; 1224 wpa_s->sme.sa_query_trans_id = nbuf; 1225 wpa_s->sme.sa_query_count++; 1226 1227 os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1228 1229 timeout = sa_query_retry_timeout; 1230 sec = ((timeout / 1000) * 1024) / 1000; 1231 usec = (timeout % 1000) * 1024; 1232 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL); 1233 1234 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d", 1235 wpa_s->sme.sa_query_count); 1236 1237 sme_send_sa_query_req(wpa_s, trans_id); 1238} 1239 1240 1241static void sme_start_sa_query(struct wpa_supplicant *wpa_s) 1242{ 1243 sme_sa_query_timer(wpa_s, NULL); 1244} 1245 1246 1247static void sme_stop_sa_query(struct wpa_supplicant *wpa_s) 1248{ 1249 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL); 1250 os_free(wpa_s->sme.sa_query_trans_id); 1251 wpa_s->sme.sa_query_trans_id = NULL; 1252 wpa_s->sme.sa_query_count = 0; 1253} 1254 1255 1256void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa, 1257 const u8 *da, u16 reason_code) 1258{ 1259 struct wpa_ssid *ssid; 1260 1261 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) 1262 return; 1263 if (wpa_s->wpa_state != WPA_COMPLETED) 1264 return; 1265 ssid = wpa_s->current_ssid; 1266 if (ssid == NULL || 1267 (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ? 1268 wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION) 1269 return; 1270 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1271 return; 1272 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA && 1273 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA) 1274 return; 1275 if (wpa_s->sme.sa_query_count > 0) 1276 return; 1277 1278 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - " 1279 "possible AP/STA state mismatch - trigger SA Query"); 1280 sme_start_sa_query(wpa_s); 1281} 1282 1283 1284void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa, 1285 const u8 *data, size_t len) 1286{ 1287 int i; 1288 1289 if (wpa_s->sme.sa_query_trans_id == NULL || 1290 len < 1 + WLAN_SA_QUERY_TR_ID_LEN || 1291 data[0] != WLAN_SA_QUERY_RESPONSE) 1292 return; 1293 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from " 1294 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]); 1295 1296 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1297 return; 1298 1299 for (i = 0; i < wpa_s->sme.sa_query_count; i++) { 1300 if (os_memcmp(wpa_s->sme.sa_query_trans_id + 1301 i * WLAN_SA_QUERY_TR_ID_LEN, 1302 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0) 1303 break; 1304 } 1305 1306 if (i >= wpa_s->sme.sa_query_count) { 1307 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query " 1308 "transaction identifier found"); 1309 return; 1310 } 1311 1312 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received " 1313 "from " MACSTR, MAC2STR(sa)); 1314 sme_stop_sa_query(wpa_s); 1315} 1316 1317#endif /* CONFIG_IEEE80211W */ 1318