1 /* 2 * wpa_supplicant - SME 3 * Copyright (c) 2009-2014, Jouni Malinen <j (at) 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 35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx); 36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx); 37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx); 38 #ifdef CONFIG_IEEE80211W 39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s); 40 #endif /* CONFIG_IEEE80211W */ 41 42 43 #ifdef CONFIG_SAE 44 45 static int index_within_array(const int *array, int idx) 46 { 47 int i; 48 for (i = 0; i < idx; i++) { 49 if (array[i] <= 0) 50 return 0; 51 } 52 return 1; 53 } 54 55 56 static 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, 0 }; 60 61 if (!groups || groups[0] <= 0) 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 84 static 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 } 120 121 122 static 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 */ 138 139 140 static 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[18]; 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 wpas_connect_work_done(wpa_s); 161 return; 162 } 163 164 wpa_s->current_bss = bss; 165 166 os_memset(¶ms, 0, sizeof(params)); 167 wpa_s->reassociate = 0; 168 169 params.freq = bss->freq; 170 params.bssid = bss->bssid; 171 params.ssid = bss->ssid; 172 params.ssid_len = bss->ssid_len; 173 params.p2p = ssid->p2p_group; 174 175 if (wpa_s->sme.ssid_len != params.ssid_len || 176 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0) 177 wpa_s->sme.prev_bssid_set = 0; 178 179 wpa_s->sme.freq = params.freq; 180 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len); 181 wpa_s->sme.ssid_len = params.ssid_len; 182 183 params.auth_alg = WPA_AUTH_ALG_OPEN; 184 #ifdef IEEE8021X_EAPOL 185 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 186 if (ssid->leap) { 187 if (ssid->non_leap == 0) 188 params.auth_alg = WPA_AUTH_ALG_LEAP; 189 else 190 params.auth_alg |= WPA_AUTH_ALG_LEAP; 191 } 192 } 193 #endif /* IEEE8021X_EAPOL */ 194 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", 195 params.auth_alg); 196 if (ssid->auth_alg) { 197 params.auth_alg = ssid->auth_alg; 198 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: " 199 "0x%x", params.auth_alg); 200 } 201 #ifdef CONFIG_SAE 202 if (wpa_key_mgmt_sae(ssid->key_mgmt)) { 203 const u8 *rsn; 204 struct wpa_ie_data ied; 205 206 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 207 if (rsn && 208 wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) { 209 if (wpa_key_mgmt_sae(ied.key_mgmt)) { 210 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg"); 211 params.auth_alg = WPA_AUTH_ALG_SAE; 212 } 213 } 214 } 215 #endif /* CONFIG_SAE */ 216 217 for (i = 0; i < NUM_WEP_KEYS; i++) { 218 if (ssid->wep_key_len[i]) 219 params.wep_key[i] = ssid->wep_key[i]; 220 params.wep_key_len[i] = ssid->wep_key_len[i]; 221 } 222 params.wep_tx_keyidx = ssid->wep_tx_keyidx; 223 224 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 225 os_memset(wpa_s->bssid, 0, ETH_ALEN); 226 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN); 227 if (bssid_changed) 228 wpas_notify_bssid_changed(wpa_s); 229 230 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) || 231 wpa_bss_get_ie(bss, WLAN_EID_RSN)) && 232 wpa_key_mgmt_wpa(ssid->key_mgmt)) { 233 int try_opportunistic; 234 try_opportunistic = (ssid->proactive_key_caching < 0 ? 235 wpa_s->conf->okc : 236 ssid->proactive_key_caching) && 237 (ssid->proto & WPA_PROTO_RSN); 238 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, 239 wpa_s->current_ssid, 240 try_opportunistic) == 0) 241 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1); 242 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 243 if (wpa_supplicant_set_suites(wpa_s, bss, ssid, 244 wpa_s->sme.assoc_req_ie, 245 &wpa_s->sme.assoc_req_ie_len)) { 246 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 247 "key management and encryption suites"); 248 wpas_connect_work_done(wpa_s); 249 return; 250 } 251 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && 252 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) { 253 /* 254 * Both WPA and non-WPA IEEE 802.1X enabled in configuration - 255 * use non-WPA since the scan results did not indicate that the 256 * AP is using WPA or WPA2. 257 */ 258 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 259 wpa_s->sme.assoc_req_ie_len = 0; 260 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) { 261 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 262 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, 263 wpa_s->sme.assoc_req_ie, 264 &wpa_s->sme.assoc_req_ie_len)) { 265 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 266 "key management and encryption suites (no " 267 "scan results)"); 268 wpas_connect_work_done(wpa_s); 269 return; 270 } 271 #ifdef CONFIG_WPS 272 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 273 struct wpabuf *wps_ie; 274 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid)); 275 if (wps_ie && wpabuf_len(wps_ie) <= 276 sizeof(wpa_s->sme.assoc_req_ie)) { 277 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie); 278 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie), 279 wpa_s->sme.assoc_req_ie_len); 280 } else 281 wpa_s->sme.assoc_req_ie_len = 0; 282 wpabuf_free(wps_ie); 283 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 284 #endif /* CONFIG_WPS */ 285 } else { 286 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 287 wpa_s->sme.assoc_req_ie_len = 0; 288 } 289 290 #ifdef CONFIG_IEEE80211R 291 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN); 292 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN) 293 md = ie + 2; 294 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0); 295 if (md) { 296 /* Prepare for the next transition */ 297 wpa_ft_prepare_auth_request(wpa_s->wpa, ie); 298 } 299 300 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) { 301 if (wpa_s->sme.assoc_req_ie_len + 5 < 302 sizeof(wpa_s->sme.assoc_req_ie)) { 303 struct rsn_mdie *mdie; 304 u8 *pos = wpa_s->sme.assoc_req_ie + 305 wpa_s->sme.assoc_req_ie_len; 306 *pos++ = WLAN_EID_MOBILITY_DOMAIN; 307 *pos++ = sizeof(*mdie); 308 mdie = (struct rsn_mdie *) pos; 309 os_memcpy(mdie->mobility_domain, md, 310 MOBILITY_DOMAIN_ID_LEN); 311 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN]; 312 wpa_s->sme.assoc_req_ie_len += 5; 313 } 314 315 if (wpa_s->sme.ft_used && 316 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 && 317 wpa_sm_has_ptk(wpa_s->wpa)) { 318 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT " 319 "over-the-air"); 320 params.auth_alg = WPA_AUTH_ALG_FT; 321 params.ie = wpa_s->sme.ft_ies; 322 params.ie_len = wpa_s->sme.ft_ies_len; 323 } 324 } 325 #endif /* CONFIG_IEEE80211R */ 326 327 #ifdef CONFIG_IEEE80211W 328 wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ? 329 wpa_s->conf->pmf : ssid->ieee80211w; 330 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) { 331 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 332 struct wpa_ie_data _ie; 333 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 && 334 _ie.capabilities & 335 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) { 336 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports " 337 "MFP: require MFP"); 338 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED; 339 } 340 } 341 #endif /* CONFIG_IEEE80211W */ 342 343 #ifdef CONFIG_P2P 344 if (wpa_s->global->p2p) { 345 u8 *pos; 346 size_t len; 347 int res; 348 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; 349 len = sizeof(wpa_s->sme.assoc_req_ie) - 350 wpa_s->sme.assoc_req_ie_len; 351 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, 352 ssid->p2p_group); 353 if (res >= 0) 354 wpa_s->sme.assoc_req_ie_len += res; 355 } 356 #endif /* CONFIG_P2P */ 357 358 #ifdef CONFIG_HS20 359 if (is_hs20_network(wpa_s, ssid, bss)) { 360 struct wpabuf *hs20; 361 hs20 = wpabuf_alloc(20); 362 if (hs20) { 363 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid); 364 size_t len; 365 366 wpas_hs20_add_indication(hs20, pps_mo_id); 367 len = sizeof(wpa_s->sme.assoc_req_ie) - 368 wpa_s->sme.assoc_req_ie_len; 369 if (wpabuf_len(hs20) <= len) { 370 os_memcpy(wpa_s->sme.assoc_req_ie + 371 wpa_s->sme.assoc_req_ie_len, 372 wpabuf_head(hs20), wpabuf_len(hs20)); 373 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20); 374 } 375 wpabuf_free(hs20); 376 } 377 } 378 #endif /* CONFIG_HS20 */ 379 380 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, 381 sizeof(ext_capab)); 382 if (ext_capab_len > 0) { 383 u8 *pos = wpa_s->sme.assoc_req_ie; 384 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN) 385 pos += 2 + pos[1]; 386 os_memmove(pos + ext_capab_len, pos, 387 wpa_s->sme.assoc_req_ie_len - 388 (pos - wpa_s->sme.assoc_req_ie)); 389 wpa_s->sme.assoc_req_ie_len += ext_capab_len; 390 os_memcpy(pos, ext_capab, ext_capab_len); 391 } 392 393 #ifdef CONFIG_SAE 394 if (params.auth_alg == WPA_AUTH_ALG_SAE) { 395 if (start) 396 resp = sme_auth_build_sae_commit(wpa_s, ssid, 397 bss->bssid); 398 else 399 resp = sme_auth_build_sae_confirm(wpa_s); 400 if (resp == NULL) { 401 wpas_connect_work_done(wpa_s); 402 return; 403 } 404 params.sae_data = wpabuf_head(resp); 405 params.sae_data_len = wpabuf_len(resp); 406 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED; 407 } 408 #endif /* CONFIG_SAE */ 409 410 wpa_supplicant_cancel_sched_scan(wpa_s); 411 wpa_supplicant_cancel_scan(wpa_s); 412 413 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR 414 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 415 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq); 416 417 wpa_clear_keys(wpa_s, bss->bssid); 418 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 419 old_ssid = wpa_s->current_ssid; 420 wpa_s->current_ssid = ssid; 421 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid); 422 wpa_supplicant_initiate_eapol(wpa_s); 423 if (old_ssid != wpa_s->current_ssid) 424 wpas_notify_network_changed(wpa_s); 425 426 #ifdef CONFIG_P2P 427 /* 428 * If multi-channel concurrency is not supported, check for any 429 * frequency conflict. In case of any frequency conflict, remove the 430 * least prioritized connection. 431 */ 432 if (wpa_s->num_multichan_concurrent < 2) { 433 int freq, num; 434 num = get_shared_radio_freqs(wpa_s, &freq, 1); 435 if (num > 0 && freq > 0 && freq != params.freq) { 436 wpa_printf(MSG_DEBUG, 437 "Conflicting frequency found (%d != %d)", 438 freq, params.freq); 439 if (wpas_p2p_handle_frequency_conflicts(wpa_s, 440 params.freq, 441 ssid) < 0) { 442 wpas_connection_failed(wpa_s, bss->bssid); 443 wpa_supplicant_mark_disassoc(wpa_s); 444 wpabuf_free(resp); 445 wpas_connect_work_done(wpa_s); 446 return; 447 } 448 } 449 } 450 #endif /* CONFIG_P2P */ 451 452 wpa_s->sme.auth_alg = params.auth_alg; 453 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) { 454 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the " 455 "driver failed"); 456 wpas_connection_failed(wpa_s, bss->bssid); 457 wpa_supplicant_mark_disassoc(wpa_s); 458 wpabuf_free(resp); 459 wpas_connect_work_done(wpa_s); 460 return; 461 } 462 463 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 464 NULL); 465 466 /* 467 * Association will be started based on the authentication event from 468 * the driver. 469 */ 470 471 wpabuf_free(resp); 472 } 473 474 475 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit) 476 { 477 struct wpa_connect_work *cwork = work->ctx; 478 struct wpa_supplicant *wpa_s = work->wpa_s; 479 480 if (deinit) { 481 if (work->started) 482 wpa_s->connect_work = NULL; 483 484 wpas_connect_work_free(cwork); 485 return; 486 } 487 488 wpa_s->connect_work = work; 489 490 if (cwork->bss_removed || 491 !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) { 492 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt"); 493 wpas_connect_work_done(wpa_s); 494 return; 495 } 496 497 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1); 498 } 499 500 501 void sme_authenticate(struct wpa_supplicant *wpa_s, 502 struct wpa_bss *bss, struct wpa_ssid *ssid) 503 { 504 struct wpa_connect_work *cwork; 505 506 if (bss == NULL || ssid == NULL) 507 return; 508 if (wpa_s->connect_work) { 509 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist"); 510 return; 511 } 512 513 if (radio_work_pending(wpa_s, "sme-connect")) { 514 /* 515 * The previous sme-connect work might no longer be valid due to 516 * the fact that the BSS list was updated. In addition, it makes 517 * sense to adhere to the 'newer' decision. 518 */ 519 wpa_dbg(wpa_s, MSG_DEBUG, 520 "SME: Remove previous pending sme-connect"); 521 radio_remove_works(wpa_s, "sme-connect", 0); 522 } 523 524 cwork = os_zalloc(sizeof(*cwork)); 525 if (cwork == NULL) 526 return; 527 cwork->bss = bss; 528 cwork->ssid = ssid; 529 cwork->sme = 1; 530 531 #ifdef CONFIG_SAE 532 wpa_s->sme.sae.state = SAE_NOTHING; 533 wpa_s->sme.sae.send_confirm = 0; 534 wpa_s->sme.sae_group_index = 0; 535 #endif /* CONFIG_SAE */ 536 537 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1, 538 sme_auth_start_cb, cwork) < 0) 539 wpas_connect_work_free(cwork); 540 } 541 542 543 #ifdef CONFIG_SAE 544 545 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction, 546 u16 status_code, const u8 *data, size_t len) 547 { 548 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u " 549 "status code %u", auth_transaction, status_code); 550 551 if (auth_transaction == 1 && 552 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ && 553 wpa_s->sme.sae.state == SAE_COMMITTED && 554 wpa_s->current_bss && wpa_s->current_ssid) { 555 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token " 556 "requested"); 557 wpabuf_free(wpa_s->sme.sae_token); 558 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len); 559 sme_send_authentication(wpa_s, wpa_s->current_bss, 560 wpa_s->current_ssid, 1); 561 return 0; 562 } 563 564 if (auth_transaction == 1 && 565 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED && 566 wpa_s->sme.sae.state == SAE_COMMITTED && 567 wpa_s->current_bss && wpa_s->current_ssid) { 568 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported"); 569 wpa_s->sme.sae_group_index++; 570 if (sme_set_sae_group(wpa_s) < 0) 571 return -1; /* no other groups enabled */ 572 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group"); 573 sme_send_authentication(wpa_s, wpa_s->current_bss, 574 wpa_s->current_ssid, 1); 575 return 0; 576 } 577 578 if (status_code != WLAN_STATUS_SUCCESS) 579 return -1; 580 581 if (auth_transaction == 1) { 582 int *groups = wpa_s->conf->sae_groups; 583 584 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit"); 585 if (wpa_s->current_bss == NULL || 586 wpa_s->current_ssid == NULL) 587 return -1; 588 if (wpa_s->sme.sae.state != SAE_COMMITTED) 589 return -1; 590 if (groups && groups[0] <= 0) 591 groups = NULL; 592 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL, 593 groups) != WLAN_STATUS_SUCCESS) 594 return -1; 595 596 if (sae_process_commit(&wpa_s->sme.sae) < 0) { 597 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer " 598 "commit"); 599 return -1; 600 } 601 602 wpabuf_free(wpa_s->sme.sae_token); 603 wpa_s->sme.sae_token = NULL; 604 sme_send_authentication(wpa_s, wpa_s->current_bss, 605 wpa_s->current_ssid, 0); 606 return 0; 607 } else if (auth_transaction == 2) { 608 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm"); 609 if (wpa_s->sme.sae.state != SAE_CONFIRMED) 610 return -1; 611 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0) 612 return -1; 613 wpa_s->sme.sae.state = SAE_ACCEPTED; 614 sae_clear_temp_data(&wpa_s->sme.sae); 615 return 1; 616 } 617 618 return -1; 619 } 620 #endif /* CONFIG_SAE */ 621 622 623 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data) 624 { 625 struct wpa_ssid *ssid = wpa_s->current_ssid; 626 627 if (ssid == NULL) { 628 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 629 "when network is not selected"); 630 return; 631 } 632 633 if (wpa_s->wpa_state != WPA_AUTHENTICATING) { 634 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 635 "when not in authenticating state"); 636 return; 637 } 638 639 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) { 640 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with " 641 "unexpected peer " MACSTR, 642 MAC2STR(data->auth.peer)); 643 return; 644 } 645 646 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR 647 " auth_type=%d auth_transaction=%d status_code=%d", 648 MAC2STR(data->auth.peer), data->auth.auth_type, 649 data->auth.auth_transaction, data->auth.status_code); 650 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs", 651 data->auth.ies, data->auth.ies_len); 652 653 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 654 655 #ifdef CONFIG_SAE 656 if (data->auth.auth_type == WLAN_AUTH_SAE) { 657 int res; 658 res = sme_sae_auth(wpa_s, data->auth.auth_transaction, 659 data->auth.status_code, data->auth.ies, 660 data->auth.ies_len); 661 if (res < 0) { 662 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 663 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 664 665 } 666 if (res != 1) 667 return; 668 669 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for " 670 "4-way handshake"); 671 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN); 672 } 673 #endif /* CONFIG_SAE */ 674 675 if (data->auth.status_code != WLAN_STATUS_SUCCESS) { 676 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status " 677 "code %d)", data->auth.status_code); 678 679 if (data->auth.status_code != 680 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG || 681 wpa_s->sme.auth_alg == data->auth.auth_type || 682 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) { 683 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 684 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 685 return; 686 } 687 688 wpas_connect_work_done(wpa_s); 689 690 switch (data->auth.auth_type) { 691 case WLAN_AUTH_OPEN: 692 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED; 693 694 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth"); 695 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 696 wpa_s->current_ssid); 697 return; 698 699 case WLAN_AUTH_SHARED_KEY: 700 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP; 701 702 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth"); 703 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 704 wpa_s->current_ssid); 705 return; 706 707 default: 708 return; 709 } 710 } 711 712 #ifdef CONFIG_IEEE80211R 713 if (data->auth.auth_type == WLAN_AUTH_FT) { 714 union wpa_event_data edata; 715 os_memset(&edata, 0, sizeof(edata)); 716 edata.ft_ies.ies = data->auth.ies; 717 edata.ft_ies.ies_len = data->auth.ies_len; 718 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN); 719 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata); 720 } 721 #endif /* CONFIG_IEEE80211R */ 722 723 sme_associate(wpa_s, ssid->mode, data->auth.peer, 724 data->auth.auth_type); 725 } 726 727 728 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode, 729 const u8 *bssid, u16 auth_type) 730 { 731 struct wpa_driver_associate_params params; 732 struct ieee802_11_elems elems; 733 #ifdef CONFIG_HT_OVERRIDES 734 struct ieee80211_ht_capabilities htcaps; 735 struct ieee80211_ht_capabilities htcaps_mask; 736 #endif /* CONFIG_HT_OVERRIDES */ 737 #ifdef CONFIG_VHT_OVERRIDES 738 struct ieee80211_vht_capabilities vhtcaps; 739 struct ieee80211_vht_capabilities vhtcaps_mask; 740 #endif /* CONFIG_VHT_OVERRIDES */ 741 742 os_memset(¶ms, 0, sizeof(params)); 743 params.bssid = bssid; 744 params.ssid = wpa_s->sme.ssid; 745 params.ssid_len = wpa_s->sme.ssid_len; 746 params.freq.freq = wpa_s->sme.freq; 747 params.bg_scan_period = wpa_s->current_ssid ? 748 wpa_s->current_ssid->bg_scan_period : -1; 749 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ? 750 wpa_s->sme.assoc_req_ie : NULL; 751 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len; 752 params.pairwise_suite = wpa_s->pairwise_cipher; 753 params.group_suite = wpa_s->group_cipher; 754 params.key_mgmt_suite = wpa_s->key_mgmt; 755 params.wpa_proto = wpa_s->wpa_proto; 756 #ifdef CONFIG_HT_OVERRIDES 757 os_memset(&htcaps, 0, sizeof(htcaps)); 758 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask)); 759 params.htcaps = (u8 *) &htcaps; 760 params.htcaps_mask = (u8 *) &htcaps_mask; 761 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); 762 #endif /* CONFIG_HT_OVERRIDES */ 763 #ifdef CONFIG_VHT_OVERRIDES 764 os_memset(&vhtcaps, 0, sizeof(vhtcaps)); 765 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask)); 766 params.vhtcaps = &vhtcaps; 767 params.vhtcaps_mask = &vhtcaps_mask; 768 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); 769 #endif /* CONFIG_VHT_OVERRIDES */ 770 #ifdef CONFIG_IEEE80211R 771 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) { 772 params.wpa_ie = wpa_s->sme.ft_ies; 773 params.wpa_ie_len = wpa_s->sme.ft_ies_len; 774 } 775 #endif /* CONFIG_IEEE80211R */ 776 params.mode = mode; 777 params.mgmt_frame_protection = wpa_s->sme.mfp; 778 if (wpa_s->sme.prev_bssid_set) 779 params.prev_bssid = wpa_s->sme.prev_bssid; 780 781 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR 782 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 783 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "", 784 params.freq.freq); 785 786 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING); 787 788 if (params.wpa_ie == NULL || 789 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0) 790 < 0) { 791 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!"); 792 os_memset(&elems, 0, sizeof(elems)); 793 } 794 if (elems.rsn_ie) { 795 params.wpa_proto = WPA_PROTO_RSN; 796 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2, 797 elems.rsn_ie_len + 2); 798 } else if (elems.wpa_ie) { 799 params.wpa_proto = WPA_PROTO_WPA; 800 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2, 801 elems.wpa_ie_len + 2); 802 } else if (elems.osen) { 803 params.wpa_proto = WPA_PROTO_OSEN; 804 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2, 805 elems.osen_len + 2); 806 } else 807 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 808 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group) 809 params.p2p = 1; 810 811 if (wpa_s->parent->set_sta_uapsd) 812 params.uapsd = wpa_s->parent->sta_uapsd; 813 else 814 params.uapsd = -1; 815 816 if (wpa_drv_associate(wpa_s, ¶ms) < 0) { 817 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the " 818 "driver failed"); 819 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 820 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 821 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 822 return; 823 } 824 825 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s, 826 NULL); 827 } 828 829 830 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md, 831 const u8 *ies, size_t ies_len) 832 { 833 if (md == NULL || ies == NULL) { 834 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain"); 835 os_free(wpa_s->sme.ft_ies); 836 wpa_s->sme.ft_ies = NULL; 837 wpa_s->sme.ft_ies_len = 0; 838 wpa_s->sme.ft_used = 0; 839 return 0; 840 } 841 842 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); 843 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len); 844 os_free(wpa_s->sme.ft_ies); 845 wpa_s->sme.ft_ies = os_malloc(ies_len); 846 if (wpa_s->sme.ft_ies == NULL) 847 return -1; 848 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len); 849 wpa_s->sme.ft_ies_len = ies_len; 850 return 0; 851 } 852 853 854 static void sme_deauth(struct wpa_supplicant *wpa_s) 855 { 856 int bssid_changed; 857 858 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 859 860 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, 861 WLAN_REASON_DEAUTH_LEAVING) < 0) { 862 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver " 863 "failed"); 864 } 865 wpa_s->sme.prev_bssid_set = 0; 866 867 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 868 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 869 os_memset(wpa_s->bssid, 0, ETH_ALEN); 870 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 871 if (bssid_changed) 872 wpas_notify_bssid_changed(wpa_s); 873 } 874 875 876 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s, 877 union wpa_event_data *data) 878 { 879 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: " 880 "status code %d", MAC2STR(wpa_s->pending_bssid), 881 data->assoc_reject.status_code); 882 883 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 884 885 /* 886 * For now, unconditionally terminate the previous authentication. In 887 * theory, this should not be needed, but mac80211 gets quite confused 888 * if the authentication is left pending.. Some roaming cases might 889 * benefit from using the previous authentication, so this could be 890 * optimized in the future. 891 */ 892 sme_deauth(wpa_s); 893 } 894 895 896 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s, 897 union wpa_event_data *data) 898 { 899 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out"); 900 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 901 wpa_supplicant_mark_disassoc(wpa_s); 902 } 903 904 905 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s, 906 union wpa_event_data *data) 907 { 908 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out"); 909 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 910 wpa_supplicant_mark_disassoc(wpa_s); 911 } 912 913 914 void sme_event_disassoc(struct wpa_supplicant *wpa_s, 915 struct disassoc_info *info) 916 { 917 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received"); 918 if (wpa_s->sme.prev_bssid_set) { 919 /* 920 * cfg80211/mac80211 can get into somewhat confused state if 921 * the AP only disassociates us and leaves us in authenticated 922 * state. For now, force the state to be cleared to avoid 923 * confusing errors if we try to associate with the AP again. 924 */ 925 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear " 926 "driver state"); 927 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid, 928 WLAN_REASON_DEAUTH_LEAVING); 929 } 930 } 931 932 933 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx) 934 { 935 struct wpa_supplicant *wpa_s = eloop_ctx; 936 if (wpa_s->wpa_state == WPA_AUTHENTICATING) { 937 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout"); 938 sme_deauth(wpa_s); 939 } 940 } 941 942 943 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx) 944 { 945 struct wpa_supplicant *wpa_s = eloop_ctx; 946 if (wpa_s->wpa_state == WPA_ASSOCIATING) { 947 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout"); 948 sme_deauth(wpa_s); 949 } 950 } 951 952 953 void sme_state_changed(struct wpa_supplicant *wpa_s) 954 { 955 /* Make sure timers are cleaned up appropriately. */ 956 if (wpa_s->wpa_state != WPA_ASSOCIATING) 957 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 958 if (wpa_s->wpa_state != WPA_AUTHENTICATING) 959 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 960 } 961 962 963 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s, 964 const u8 *prev_pending_bssid) 965 { 966 /* 967 * mac80211-workaround to force deauth on failed auth cmd, 968 * requires us to remain in authenticating state to allow the 969 * second authentication attempt to be continued properly. 970 */ 971 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication " 972 "to proceed after disconnection event"); 973 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 974 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN); 975 976 /* 977 * Re-arm authentication timer in case auth fails for whatever reason. 978 */ 979 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 980 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 981 NULL); 982 } 983 984 985 void sme_deinit(struct wpa_supplicant *wpa_s) 986 { 987 os_free(wpa_s->sme.ft_ies); 988 wpa_s->sme.ft_ies = NULL; 989 wpa_s->sme.ft_ies_len = 0; 990 #ifdef CONFIG_IEEE80211W 991 sme_stop_sa_query(wpa_s); 992 #endif /* CONFIG_IEEE80211W */ 993 #ifdef CONFIG_SAE 994 wpabuf_free(wpa_s->sme.sae_token); 995 wpa_s->sme.sae_token = NULL; 996 sae_clear_data(&wpa_s->sme.sae); 997 #endif /* CONFIG_SAE */ 998 999 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 1000 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 1001 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 1002 } 1003 1004 1005 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s, 1006 const u8 *chan_list, u8 num_channels, 1007 u8 num_intol) 1008 { 1009 struct ieee80211_2040_bss_coex_ie *bc_ie; 1010 struct ieee80211_2040_intol_chan_report *ic_report; 1011 struct wpabuf *buf; 1012 1013 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR 1014 " (num_channels=%u num_intol=%u)", 1015 MAC2STR(wpa_s->bssid), num_channels, num_intol); 1016 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels", 1017 chan_list, num_channels); 1018 1019 buf = wpabuf_alloc(2 + /* action.category + action_code */ 1020 sizeof(struct ieee80211_2040_bss_coex_ie) + 1021 sizeof(struct ieee80211_2040_intol_chan_report) + 1022 num_channels); 1023 if (buf == NULL) 1024 return; 1025 1026 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC); 1027 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX); 1028 1029 bc_ie = wpabuf_put(buf, sizeof(*bc_ie)); 1030 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE; 1031 bc_ie->length = 1; 1032 if (num_intol) 1033 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ; 1034 1035 if (num_channels > 0) { 1036 ic_report = wpabuf_put(buf, sizeof(*ic_report)); 1037 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT; 1038 ic_report->length = num_channels + 1; 1039 ic_report->op_class = 0; 1040 os_memcpy(wpabuf_put(buf, num_channels), chan_list, 1041 num_channels); 1042 } 1043 1044 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 1045 wpa_s->own_addr, wpa_s->bssid, 1046 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) { 1047 wpa_msg(wpa_s, MSG_INFO, 1048 "SME: Failed to send 20/40 BSS Coexistence frame"); 1049 } 1050 1051 wpabuf_free(buf); 1052 } 1053 1054 1055 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s) 1056 { 1057 struct wpa_bss *bss; 1058 const u8 *ie; 1059 u16 ht_cap; 1060 u8 chan_list[P2P_MAX_CHANNELS], channel; 1061 u8 num_channels = 0, num_intol = 0, i; 1062 1063 if (!wpa_s->sme.sched_obss_scan) 1064 return 0; 1065 1066 wpa_s->sme.sched_obss_scan = 0; 1067 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED) 1068 return 1; 1069 1070 /* 1071 * Check whether AP uses regulatory triplet or channel triplet in 1072 * country info. Right now the operating class of the BSS channel 1073 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12), 1074 * based on the assumption that operating class triplet is not used in 1075 * beacon frame. If the First Channel Number/Operating Extension 1076 * Identifier octet has a positive integer value of 201 or greater, 1077 * then its operating class triplet. 1078 * 1079 * TODO: If Supported Operating Classes element is present in beacon 1080 * frame, have to lookup operating class in Annex E and fill them in 1081 * 2040 coex frame. 1082 */ 1083 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); 1084 if (ie && (ie[1] >= 6) && (ie[5] >= 201)) 1085 return 1; 1086 1087 os_memset(chan_list, 0, sizeof(chan_list)); 1088 1089 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 1090 /* Skip other band bss */ 1091 enum hostapd_hw_mode mode; 1092 mode = ieee80211_freq_to_chan(bss->freq, &channel); 1093 if (mode != HOSTAPD_MODE_IEEE80211G && 1094 mode != HOSTAPD_MODE_IEEE80211B) 1095 continue; 1096 1097 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP); 1098 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0; 1099 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR 1100 " freq=%u chan=%u ht_cap=0x%x", 1101 MAC2STR(bss->bssid), bss->freq, channel, ht_cap); 1102 1103 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) { 1104 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT) 1105 num_intol++; 1106 1107 /* Check whether the channel is already considered */ 1108 for (i = 0; i < num_channels; i++) { 1109 if (channel == chan_list[i]) 1110 break; 1111 } 1112 if (i != num_channels) 1113 continue; 1114 1115 chan_list[num_channels++] = channel; 1116 } 1117 } 1118 1119 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol); 1120 return 1; 1121 } 1122 1123 1124 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes, 1125 u16 num_modes, 1126 enum hostapd_hw_mode mode) 1127 { 1128 u16 i; 1129 1130 for (i = 0; i < num_modes; i++) { 1131 if (modes[i].mode == mode) 1132 return &modes[i]; 1133 } 1134 1135 return NULL; 1136 } 1137 1138 1139 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s, 1140 enum hostapd_hw_mode band, 1141 struct wpa_driver_scan_params *params) 1142 { 1143 /* Include only supported channels for the specified band */ 1144 struct hostapd_hw_modes *mode; 1145 int count, i; 1146 1147 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band); 1148 if (mode == NULL) { 1149 /* No channels supported in this band - use empty list */ 1150 params->freqs = os_zalloc(sizeof(int)); 1151 return; 1152 } 1153 1154 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); 1155 if (params->freqs == NULL) 1156 return; 1157 for (count = 0, i = 0; i < mode->num_channels; i++) { 1158 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) 1159 continue; 1160 params->freqs[count++] = mode->channels[i].freq; 1161 } 1162 } 1163 1164 1165 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1166 { 1167 struct wpa_supplicant *wpa_s = eloop_ctx; 1168 struct wpa_driver_scan_params params; 1169 1170 if (!wpa_s->current_bss) { 1171 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request"); 1172 return; 1173 } 1174 1175 os_memset(¶ms, 0, sizeof(params)); 1176 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, ¶ms); 1177 params.low_priority = 1; 1178 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan"); 1179 1180 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms)) 1181 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan"); 1182 else 1183 wpa_s->sme.sched_obss_scan = 1; 1184 os_free(params.freqs); 1185 1186 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 1187 sme_obss_scan_timeout, wpa_s, NULL); 1188 } 1189 1190 1191 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable) 1192 { 1193 const u8 *ie; 1194 struct wpa_bss *bss = wpa_s->current_bss; 1195 struct wpa_ssid *ssid = wpa_s->current_ssid; 1196 struct hostapd_hw_modes *hw_mode = NULL; 1197 int i; 1198 1199 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 1200 wpa_s->sme.sched_obss_scan = 0; 1201 if (!enable) 1202 return; 1203 1204 /* 1205 * Schedule OBSS scan if driver is using station SME in wpa_supplicant 1206 * or it expects OBSS scan to be performed by wpa_supplicant. 1207 */ 1208 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || 1209 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) || 1210 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA) 1211 return; 1212 1213 if (!wpa_s->hw.modes) 1214 return; 1215 1216 /* only HT caps in 11g mode are relevant */ 1217 for (i = 0; i < wpa_s->hw.num_modes; i++) { 1218 hw_mode = &wpa_s->hw.modes[i]; 1219 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G) 1220 break; 1221 } 1222 1223 /* Driver does not support HT40 for 11g or doesn't have 11g. */ 1224 if (i == wpa_s->hw.num_modes || !hw_mode || 1225 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 1226 return; 1227 1228 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500) 1229 return; /* Not associated on 2.4 GHz band */ 1230 1231 /* Check whether AP supports HT40 */ 1232 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP); 1233 if (!ie || ie[1] < 2 || 1234 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 1235 return; /* AP does not support HT40 */ 1236 1237 ie = wpa_bss_get_ie(wpa_s->current_bss, 1238 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS); 1239 if (!ie || ie[1] < 14) 1240 return; /* AP does not request OBSS scans */ 1241 1242 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6); 1243 if (wpa_s->sme.obss_scan_int < 10) { 1244 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u " 1245 "replaced with the minimum 10 sec", 1246 wpa_s->sme.obss_scan_int); 1247 wpa_s->sme.obss_scan_int = 10; 1248 } 1249 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec", 1250 wpa_s->sme.obss_scan_int); 1251 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 1252 sme_obss_scan_timeout, wpa_s, NULL); 1253 } 1254 1255 1256 #ifdef CONFIG_IEEE80211W 1257 1258 static const unsigned int sa_query_max_timeout = 1000; 1259 static const unsigned int sa_query_retry_timeout = 201; 1260 1261 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s) 1262 { 1263 u32 tu; 1264 struct os_reltime now, passed; 1265 os_get_reltime(&now); 1266 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed); 1267 tu = (passed.sec * 1000000 + passed.usec) / 1024; 1268 if (sa_query_max_timeout < tu) { 1269 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out"); 1270 sme_stop_sa_query(wpa_s); 1271 wpa_supplicant_deauthenticate( 1272 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID); 1273 return 1; 1274 } 1275 1276 return 0; 1277 } 1278 1279 1280 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s, 1281 const u8 *trans_id) 1282 { 1283 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN]; 1284 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to " 1285 MACSTR, MAC2STR(wpa_s->bssid)); 1286 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID", 1287 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1288 req[0] = WLAN_ACTION_SA_QUERY; 1289 req[1] = WLAN_SA_QUERY_REQUEST; 1290 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1291 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 1292 wpa_s->own_addr, wpa_s->bssid, 1293 req, sizeof(req), 0) < 0) 1294 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query " 1295 "Request"); 1296 } 1297 1298 1299 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx) 1300 { 1301 struct wpa_supplicant *wpa_s = eloop_ctx; 1302 unsigned int timeout, sec, usec; 1303 u8 *trans_id, *nbuf; 1304 1305 if (wpa_s->sme.sa_query_count > 0 && 1306 sme_check_sa_query_timeout(wpa_s)) 1307 return; 1308 1309 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id, 1310 wpa_s->sme.sa_query_count + 1, 1311 WLAN_SA_QUERY_TR_ID_LEN); 1312 if (nbuf == NULL) 1313 return; 1314 if (wpa_s->sme.sa_query_count == 0) { 1315 /* Starting a new SA Query procedure */ 1316 os_get_reltime(&wpa_s->sme.sa_query_start); 1317 } 1318 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN; 1319 wpa_s->sme.sa_query_trans_id = nbuf; 1320 wpa_s->sme.sa_query_count++; 1321 1322 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) { 1323 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID"); 1324 return; 1325 } 1326 1327 timeout = sa_query_retry_timeout; 1328 sec = ((timeout / 1000) * 1024) / 1000; 1329 usec = (timeout % 1000) * 1024; 1330 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL); 1331 1332 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d", 1333 wpa_s->sme.sa_query_count); 1334 1335 sme_send_sa_query_req(wpa_s, trans_id); 1336 } 1337 1338 1339 static void sme_start_sa_query(struct wpa_supplicant *wpa_s) 1340 { 1341 sme_sa_query_timer(wpa_s, NULL); 1342 } 1343 1344 1345 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s) 1346 { 1347 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL); 1348 os_free(wpa_s->sme.sa_query_trans_id); 1349 wpa_s->sme.sa_query_trans_id = NULL; 1350 wpa_s->sme.sa_query_count = 0; 1351 } 1352 1353 1354 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa, 1355 const u8 *da, u16 reason_code) 1356 { 1357 struct wpa_ssid *ssid; 1358 struct os_reltime now; 1359 1360 if (wpa_s->wpa_state != WPA_COMPLETED) 1361 return; 1362 ssid = wpa_s->current_ssid; 1363 if (ssid == NULL || 1364 (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ? 1365 wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION) 1366 return; 1367 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1368 return; 1369 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA && 1370 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA) 1371 return; 1372 if (wpa_s->sme.sa_query_count > 0) 1373 return; 1374 1375 os_get_reltime(&now); 1376 if (wpa_s->sme.last_unprot_disconnect.sec && 1377 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10)) 1378 return; /* limit SA Query procedure frequency */ 1379 wpa_s->sme.last_unprot_disconnect = now; 1380 1381 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - " 1382 "possible AP/STA state mismatch - trigger SA Query"); 1383 sme_start_sa_query(wpa_s); 1384 } 1385 1386 1387 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa, 1388 const u8 *data, size_t len) 1389 { 1390 int i; 1391 1392 if (wpa_s->sme.sa_query_trans_id == NULL || 1393 len < 1 + WLAN_SA_QUERY_TR_ID_LEN || 1394 data[0] != WLAN_SA_QUERY_RESPONSE) 1395 return; 1396 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from " 1397 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]); 1398 1399 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1400 return; 1401 1402 for (i = 0; i < wpa_s->sme.sa_query_count; i++) { 1403 if (os_memcmp(wpa_s->sme.sa_query_trans_id + 1404 i * WLAN_SA_QUERY_TR_ID_LEN, 1405 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0) 1406 break; 1407 } 1408 1409 if (i >= wpa_s->sme.sa_query_count) { 1410 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query " 1411 "transaction identifier found"); 1412 return; 1413 } 1414 1415 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received " 1416 "from " MACSTR, MAC2STR(sa)); 1417 sme_stop_sa_query(wpa_s); 1418 } 1419 1420 #endif /* CONFIG_IEEE80211W */ 1421
