1 /* 2 * wpa_supplicant - SME 3 * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "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 /** 141 * sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt 142 * @wpa_s: Pointer to wpa_supplicant data 143 * @bss: Pointer to the bss which is the target of authentication attempt 144 */ 145 static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s, 146 struct wpa_bss *bss) 147 { 148 const u8 rrm_ie_len = 5; 149 u8 *pos; 150 const u8 *rrm_ie; 151 152 wpa_s->rrm.rrm_used = 0; 153 154 wpa_printf(MSG_DEBUG, 155 "RRM: Determining whether RRM can be used - device support: 0x%x", 156 wpa_s->drv_rrm_flags); 157 158 rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES); 159 if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) { 160 wpa_printf(MSG_DEBUG, "RRM: No RRM in network"); 161 return; 162 } 163 164 if (!(wpa_s->drv_rrm_flags & 165 WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) || 166 !(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) { 167 wpa_printf(MSG_DEBUG, 168 "RRM: Insufficient RRM support in driver - do not use RRM"); 169 return; 170 } 171 172 if (sizeof(wpa_s->sme.assoc_req_ie) < 173 wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) { 174 wpa_printf(MSG_INFO, 175 "RRM: Unable to use RRM, no room for RRM IE"); 176 return; 177 } 178 179 wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request"); 180 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; 181 os_memset(pos, 0, 2 + rrm_ie_len); 182 *pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES; 183 *pos++ = rrm_ie_len; 184 185 /* Set supported capabilites flags */ 186 if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION) 187 *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT; 188 189 wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2; 190 wpa_s->rrm.rrm_used = 1; 191 } 192 193 194 static void sme_send_authentication(struct wpa_supplicant *wpa_s, 195 struct wpa_bss *bss, struct wpa_ssid *ssid, 196 int start) 197 { 198 struct wpa_driver_auth_params params; 199 struct wpa_ssid *old_ssid; 200 #ifdef CONFIG_IEEE80211R 201 const u8 *ie; 202 #endif /* CONFIG_IEEE80211R */ 203 #ifdef CONFIG_IEEE80211R 204 const u8 *md = NULL; 205 #endif /* CONFIG_IEEE80211R */ 206 int i, bssid_changed; 207 struct wpabuf *resp = NULL; 208 u8 ext_capab[18]; 209 int ext_capab_len; 210 int skip_auth; 211 212 if (bss == NULL) { 213 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for " 214 "the network"); 215 wpas_connect_work_done(wpa_s); 216 return; 217 } 218 219 skip_auth = wpa_s->conf->reassoc_same_bss_optim && 220 wpa_s->reassoc_same_bss; 221 wpa_s->current_bss = bss; 222 223 os_memset(¶ms, 0, sizeof(params)); 224 wpa_s->reassociate = 0; 225 226 params.freq = bss->freq; 227 params.bssid = bss->bssid; 228 params.ssid = bss->ssid; 229 params.ssid_len = bss->ssid_len; 230 params.p2p = ssid->p2p_group; 231 232 if (wpa_s->sme.ssid_len != params.ssid_len || 233 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0) 234 wpa_s->sme.prev_bssid_set = 0; 235 236 wpa_s->sme.freq = params.freq; 237 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len); 238 wpa_s->sme.ssid_len = params.ssid_len; 239 240 params.auth_alg = WPA_AUTH_ALG_OPEN; 241 #ifdef IEEE8021X_EAPOL 242 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 243 if (ssid->leap) { 244 if (ssid->non_leap == 0) 245 params.auth_alg = WPA_AUTH_ALG_LEAP; 246 else 247 params.auth_alg |= WPA_AUTH_ALG_LEAP; 248 } 249 } 250 #endif /* IEEE8021X_EAPOL */ 251 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", 252 params.auth_alg); 253 if (ssid->auth_alg) { 254 params.auth_alg = ssid->auth_alg; 255 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: " 256 "0x%x", params.auth_alg); 257 } 258 #ifdef CONFIG_SAE 259 wpa_s->sme.sae_pmksa_caching = 0; 260 if (wpa_key_mgmt_sae(ssid->key_mgmt)) { 261 const u8 *rsn; 262 struct wpa_ie_data ied; 263 264 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 265 if (!rsn) { 266 wpa_dbg(wpa_s, MSG_DEBUG, 267 "SAE enabled, but target BSS does not advertise RSN"); 268 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 && 269 wpa_key_mgmt_sae(ied.key_mgmt)) { 270 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg"); 271 params.auth_alg = WPA_AUTH_ALG_SAE; 272 } else { 273 wpa_dbg(wpa_s, MSG_DEBUG, 274 "SAE enabled, but target BSS does not advertise SAE AKM for RSN"); 275 } 276 } 277 #endif /* CONFIG_SAE */ 278 279 for (i = 0; i < NUM_WEP_KEYS; i++) { 280 if (ssid->wep_key_len[i]) 281 params.wep_key[i] = ssid->wep_key[i]; 282 params.wep_key_len[i] = ssid->wep_key_len[i]; 283 } 284 params.wep_tx_keyidx = ssid->wep_tx_keyidx; 285 286 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 287 os_memset(wpa_s->bssid, 0, ETH_ALEN); 288 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN); 289 if (bssid_changed) 290 wpas_notify_bssid_changed(wpa_s); 291 292 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) || 293 wpa_bss_get_ie(bss, WLAN_EID_RSN)) && 294 wpa_key_mgmt_wpa(ssid->key_mgmt)) { 295 int try_opportunistic; 296 try_opportunistic = (ssid->proactive_key_caching < 0 ? 297 wpa_s->conf->okc : 298 ssid->proactive_key_caching) && 299 (ssid->proto & WPA_PROTO_RSN); 300 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, 301 wpa_s->current_ssid, 302 try_opportunistic) == 0) 303 eapol_sm_notify_pmkid_attempt(wpa_s->eapol); 304 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 305 if (wpa_supplicant_set_suites(wpa_s, bss, ssid, 306 wpa_s->sme.assoc_req_ie, 307 &wpa_s->sme.assoc_req_ie_len)) { 308 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 309 "key management and encryption suites"); 310 wpas_connect_work_done(wpa_s); 311 return; 312 } 313 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && 314 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) { 315 /* 316 * Both WPA and non-WPA IEEE 802.1X enabled in configuration - 317 * use non-WPA since the scan results did not indicate that the 318 * AP is using WPA or WPA2. 319 */ 320 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 321 wpa_s->sme.assoc_req_ie_len = 0; 322 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) { 323 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); 324 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, 325 wpa_s->sme.assoc_req_ie, 326 &wpa_s->sme.assoc_req_ie_len)) { 327 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " 328 "key management and encryption suites (no " 329 "scan results)"); 330 wpas_connect_work_done(wpa_s); 331 return; 332 } 333 #ifdef CONFIG_WPS 334 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 335 struct wpabuf *wps_ie; 336 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid)); 337 if (wps_ie && wpabuf_len(wps_ie) <= 338 sizeof(wpa_s->sme.assoc_req_ie)) { 339 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie); 340 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie), 341 wpa_s->sme.assoc_req_ie_len); 342 } else 343 wpa_s->sme.assoc_req_ie_len = 0; 344 wpabuf_free(wps_ie); 345 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 346 #endif /* CONFIG_WPS */ 347 } else { 348 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 349 wpa_s->sme.assoc_req_ie_len = 0; 350 } 351 352 #ifdef CONFIG_IEEE80211R 353 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN); 354 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN) 355 md = ie + 2; 356 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0); 357 if (md) { 358 /* Prepare for the next transition */ 359 wpa_ft_prepare_auth_request(wpa_s->wpa, ie); 360 } 361 362 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) { 363 if (wpa_s->sme.assoc_req_ie_len + 5 < 364 sizeof(wpa_s->sme.assoc_req_ie)) { 365 struct rsn_mdie *mdie; 366 u8 *pos = wpa_s->sme.assoc_req_ie + 367 wpa_s->sme.assoc_req_ie_len; 368 *pos++ = WLAN_EID_MOBILITY_DOMAIN; 369 *pos++ = sizeof(*mdie); 370 mdie = (struct rsn_mdie *) pos; 371 os_memcpy(mdie->mobility_domain, md, 372 MOBILITY_DOMAIN_ID_LEN); 373 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN]; 374 wpa_s->sme.assoc_req_ie_len += 5; 375 } 376 377 if (wpa_s->sme.ft_used && 378 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 && 379 wpa_sm_has_ptk(wpa_s->wpa)) { 380 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT " 381 "over-the-air"); 382 params.auth_alg = WPA_AUTH_ALG_FT; 383 params.ie = wpa_s->sme.ft_ies; 384 params.ie_len = wpa_s->sme.ft_ies_len; 385 } 386 } 387 #endif /* CONFIG_IEEE80211R */ 388 389 #ifdef CONFIG_IEEE80211W 390 wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid); 391 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) { 392 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 393 struct wpa_ie_data _ie; 394 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 && 395 _ie.capabilities & 396 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) { 397 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports " 398 "MFP: require MFP"); 399 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED; 400 } 401 } 402 #endif /* CONFIG_IEEE80211W */ 403 404 #ifdef CONFIG_P2P 405 if (wpa_s->global->p2p) { 406 u8 *pos; 407 size_t len; 408 int res; 409 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; 410 len = sizeof(wpa_s->sme.assoc_req_ie) - 411 wpa_s->sme.assoc_req_ie_len; 412 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, 413 ssid->p2p_group); 414 if (res >= 0) 415 wpa_s->sme.assoc_req_ie_len += res; 416 } 417 #endif /* CONFIG_P2P */ 418 419 #ifdef CONFIG_HS20 420 if (is_hs20_network(wpa_s, ssid, bss)) { 421 struct wpabuf *hs20; 422 hs20 = wpabuf_alloc(20); 423 if (hs20) { 424 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid); 425 size_t len; 426 427 wpas_hs20_add_indication(hs20, pps_mo_id); 428 len = sizeof(wpa_s->sme.assoc_req_ie) - 429 wpa_s->sme.assoc_req_ie_len; 430 if (wpabuf_len(hs20) <= len) { 431 os_memcpy(wpa_s->sme.assoc_req_ie + 432 wpa_s->sme.assoc_req_ie_len, 433 wpabuf_head(hs20), wpabuf_len(hs20)); 434 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20); 435 } 436 wpabuf_free(hs20); 437 } 438 } 439 #endif /* CONFIG_HS20 */ 440 441 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, 442 sizeof(ext_capab)); 443 if (ext_capab_len > 0) { 444 u8 *pos = wpa_s->sme.assoc_req_ie; 445 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN) 446 pos += 2 + pos[1]; 447 os_memmove(pos + ext_capab_len, pos, 448 wpa_s->sme.assoc_req_ie_len - 449 (pos - wpa_s->sme.assoc_req_ie)); 450 wpa_s->sme.assoc_req_ie_len += ext_capab_len; 451 os_memcpy(pos, ext_capab, ext_capab_len); 452 } 453 454 if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) { 455 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]; 456 size_t len; 457 458 len = sizeof(wpa_s->sme.assoc_req_ie) - 459 wpa_s->sme.assoc_req_ie_len; 460 if (wpabuf_len(buf) <= len) { 461 os_memcpy(wpa_s->sme.assoc_req_ie + 462 wpa_s->sme.assoc_req_ie_len, 463 wpabuf_head(buf), wpabuf_len(buf)); 464 wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf); 465 } 466 } 467 468 sme_auth_handle_rrm(wpa_s, bss); 469 470 #ifdef CONFIG_SAE 471 if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE && 472 pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0) 473 { 474 wpa_dbg(wpa_s, MSG_DEBUG, 475 "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication"); 476 params.auth_alg = WPA_AUTH_ALG_OPEN; 477 wpa_s->sme.sae_pmksa_caching = 1; 478 } 479 480 if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) { 481 if (start) 482 resp = sme_auth_build_sae_commit(wpa_s, ssid, 483 bss->bssid); 484 else 485 resp = sme_auth_build_sae_confirm(wpa_s); 486 if (resp == NULL) { 487 wpas_connection_failed(wpa_s, bss->bssid); 488 return; 489 } 490 params.sae_data = wpabuf_head(resp); 491 params.sae_data_len = wpabuf_len(resp); 492 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED; 493 } 494 #endif /* CONFIG_SAE */ 495 496 wpa_supplicant_cancel_sched_scan(wpa_s); 497 wpa_supplicant_cancel_scan(wpa_s); 498 499 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR 500 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 501 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq); 502 503 wpa_clear_keys(wpa_s, bss->bssid); 504 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 505 old_ssid = wpa_s->current_ssid; 506 wpa_s->current_ssid = ssid; 507 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid); 508 wpa_supplicant_initiate_eapol(wpa_s); 509 if (old_ssid != wpa_s->current_ssid) 510 wpas_notify_network_changed(wpa_s); 511 512 #ifdef CONFIG_P2P 513 /* 514 * If multi-channel concurrency is not supported, check for any 515 * frequency conflict. In case of any frequency conflict, remove the 516 * least prioritized connection. 517 */ 518 if (wpa_s->num_multichan_concurrent < 2) { 519 int freq, num; 520 num = get_shared_radio_freqs(wpa_s, &freq, 1); 521 if (num > 0 && freq > 0 && freq != params.freq) { 522 wpa_printf(MSG_DEBUG, 523 "Conflicting frequency found (%d != %d)", 524 freq, params.freq); 525 if (wpas_p2p_handle_frequency_conflicts(wpa_s, 526 params.freq, 527 ssid) < 0) { 528 wpas_connection_failed(wpa_s, bss->bssid); 529 wpa_supplicant_mark_disassoc(wpa_s); 530 wpabuf_free(resp); 531 wpas_connect_work_done(wpa_s); 532 return; 533 } 534 } 535 } 536 #endif /* CONFIG_P2P */ 537 538 if (skip_auth) { 539 wpa_msg(wpa_s, MSG_DEBUG, 540 "SME: Skip authentication step on reassoc-to-same-BSS"); 541 wpabuf_free(resp); 542 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN); 543 return; 544 } 545 546 547 wpa_s->sme.auth_alg = params.auth_alg; 548 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) { 549 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the " 550 "driver failed"); 551 wpas_connection_failed(wpa_s, bss->bssid); 552 wpa_supplicant_mark_disassoc(wpa_s); 553 wpabuf_free(resp); 554 wpas_connect_work_done(wpa_s); 555 return; 556 } 557 558 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 559 NULL); 560 561 /* 562 * Association will be started based on the authentication event from 563 * the driver. 564 */ 565 566 wpabuf_free(resp); 567 } 568 569 570 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit) 571 { 572 struct wpa_connect_work *cwork = work->ctx; 573 struct wpa_supplicant *wpa_s = work->wpa_s; 574 575 if (deinit) { 576 if (work->started) 577 wpa_s->connect_work = NULL; 578 579 wpas_connect_work_free(cwork); 580 return; 581 } 582 583 wpa_s->connect_work = work; 584 585 if (cwork->bss_removed || 586 !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) { 587 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt"); 588 wpas_connect_work_done(wpa_s); 589 return; 590 } 591 592 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1); 593 } 594 595 596 void sme_authenticate(struct wpa_supplicant *wpa_s, 597 struct wpa_bss *bss, struct wpa_ssid *ssid) 598 { 599 struct wpa_connect_work *cwork; 600 601 if (bss == NULL || ssid == NULL) 602 return; 603 if (wpa_s->connect_work) { 604 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist"); 605 return; 606 } 607 608 if (radio_work_pending(wpa_s, "sme-connect")) { 609 /* 610 * The previous sme-connect work might no longer be valid due to 611 * the fact that the BSS list was updated. In addition, it makes 612 * sense to adhere to the 'newer' decision. 613 */ 614 wpa_dbg(wpa_s, MSG_DEBUG, 615 "SME: Remove previous pending sme-connect"); 616 radio_remove_works(wpa_s, "sme-connect", 0); 617 } 618 619 cwork = os_zalloc(sizeof(*cwork)); 620 if (cwork == NULL) 621 return; 622 cwork->bss = bss; 623 cwork->ssid = ssid; 624 cwork->sme = 1; 625 626 #ifdef CONFIG_SAE 627 wpa_s->sme.sae.state = SAE_NOTHING; 628 wpa_s->sme.sae.send_confirm = 0; 629 wpa_s->sme.sae_group_index = 0; 630 #endif /* CONFIG_SAE */ 631 632 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1, 633 sme_auth_start_cb, cwork) < 0) 634 wpas_connect_work_free(cwork); 635 } 636 637 638 #ifdef CONFIG_SAE 639 640 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction, 641 u16 status_code, const u8 *data, size_t len) 642 { 643 int *groups; 644 645 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u " 646 "status code %u", auth_transaction, status_code); 647 648 if (auth_transaction == 1 && 649 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ && 650 wpa_s->sme.sae.state == SAE_COMMITTED && 651 wpa_s->current_bss && wpa_s->current_ssid) { 652 int default_groups[] = { 19, 20, 21, 25, 26, 0 }; 653 u16 group; 654 655 groups = wpa_s->conf->sae_groups; 656 if (!groups || groups[0] <= 0) 657 groups = default_groups; 658 659 if (len < sizeof(le16)) { 660 wpa_dbg(wpa_s, MSG_DEBUG, 661 "SME: Too short SAE anti-clogging token request"); 662 return -1; 663 } 664 group = WPA_GET_LE16(data); 665 wpa_dbg(wpa_s, MSG_DEBUG, 666 "SME: SAE anti-clogging token requested (group %u)", 667 group); 668 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) != 669 WLAN_STATUS_SUCCESS) { 670 wpa_dbg(wpa_s, MSG_ERROR, 671 "SME: SAE group %u of anti-clogging request is invalid", 672 group); 673 return -1; 674 } 675 wpabuf_free(wpa_s->sme.sae_token); 676 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16), 677 len - sizeof(le16)); 678 sme_send_authentication(wpa_s, wpa_s->current_bss, 679 wpa_s->current_ssid, 1); 680 return 0; 681 } 682 683 if (auth_transaction == 1 && 684 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED && 685 wpa_s->sme.sae.state == SAE_COMMITTED && 686 wpa_s->current_bss && wpa_s->current_ssid) { 687 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported"); 688 wpa_s->sme.sae_group_index++; 689 if (sme_set_sae_group(wpa_s) < 0) 690 return -1; /* no other groups enabled */ 691 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group"); 692 sme_send_authentication(wpa_s, wpa_s->current_bss, 693 wpa_s->current_ssid, 1); 694 return 0; 695 } 696 697 if (status_code != WLAN_STATUS_SUCCESS) 698 return -1; 699 700 if (auth_transaction == 1) { 701 groups = wpa_s->conf->sae_groups; 702 703 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit"); 704 if (wpa_s->current_bss == NULL || 705 wpa_s->current_ssid == NULL) 706 return -1; 707 if (wpa_s->sme.sae.state != SAE_COMMITTED) 708 return -1; 709 if (groups && groups[0] <= 0) 710 groups = NULL; 711 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL, 712 groups) != WLAN_STATUS_SUCCESS) 713 return -1; 714 715 if (sae_process_commit(&wpa_s->sme.sae) < 0) { 716 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer " 717 "commit"); 718 return -1; 719 } 720 721 wpabuf_free(wpa_s->sme.sae_token); 722 wpa_s->sme.sae_token = NULL; 723 sme_send_authentication(wpa_s, wpa_s->current_bss, 724 wpa_s->current_ssid, 0); 725 return 0; 726 } else if (auth_transaction == 2) { 727 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm"); 728 if (wpa_s->sme.sae.state != SAE_CONFIRMED) 729 return -1; 730 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0) 731 return -1; 732 wpa_s->sme.sae.state = SAE_ACCEPTED; 733 sae_clear_temp_data(&wpa_s->sme.sae); 734 return 1; 735 } 736 737 return -1; 738 } 739 #endif /* CONFIG_SAE */ 740 741 742 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data) 743 { 744 struct wpa_ssid *ssid = wpa_s->current_ssid; 745 746 if (ssid == NULL) { 747 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 748 "when network is not selected"); 749 return; 750 } 751 752 if (wpa_s->wpa_state != WPA_AUTHENTICATING) { 753 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " 754 "when not in authenticating state"); 755 return; 756 } 757 758 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) { 759 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with " 760 "unexpected peer " MACSTR, 761 MAC2STR(data->auth.peer)); 762 return; 763 } 764 765 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR 766 " auth_type=%d auth_transaction=%d status_code=%d", 767 MAC2STR(data->auth.peer), data->auth.auth_type, 768 data->auth.auth_transaction, data->auth.status_code); 769 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs", 770 data->auth.ies, data->auth.ies_len); 771 772 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 773 774 #ifdef CONFIG_SAE 775 if (data->auth.auth_type == WLAN_AUTH_SAE) { 776 int res; 777 res = sme_sae_auth(wpa_s, data->auth.auth_transaction, 778 data->auth.status_code, data->auth.ies, 779 data->auth.ies_len); 780 if (res < 0) { 781 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 782 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 783 784 } 785 if (res != 1) 786 return; 787 788 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for " 789 "4-way handshake"); 790 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN, 791 wpa_s->pending_bssid); 792 } 793 #endif /* CONFIG_SAE */ 794 795 if (data->auth.status_code != WLAN_STATUS_SUCCESS) { 796 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status " 797 "code %d)", data->auth.status_code); 798 799 if (data->auth.status_code != 800 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG || 801 wpa_s->sme.auth_alg == data->auth.auth_type || 802 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) { 803 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 804 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 805 return; 806 } 807 808 wpas_connect_work_done(wpa_s); 809 810 switch (data->auth.auth_type) { 811 case WLAN_AUTH_OPEN: 812 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED; 813 814 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth"); 815 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 816 wpa_s->current_ssid); 817 return; 818 819 case WLAN_AUTH_SHARED_KEY: 820 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP; 821 822 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth"); 823 wpa_supplicant_associate(wpa_s, wpa_s->current_bss, 824 wpa_s->current_ssid); 825 return; 826 827 default: 828 return; 829 } 830 } 831 832 #ifdef CONFIG_IEEE80211R 833 if (data->auth.auth_type == WLAN_AUTH_FT) { 834 union wpa_event_data edata; 835 os_memset(&edata, 0, sizeof(edata)); 836 edata.ft_ies.ies = data->auth.ies; 837 edata.ft_ies.ies_len = data->auth.ies_len; 838 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN); 839 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata); 840 } 841 #endif /* CONFIG_IEEE80211R */ 842 843 sme_associate(wpa_s, ssid->mode, data->auth.peer, 844 data->auth.auth_type); 845 } 846 847 848 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode, 849 const u8 *bssid, u16 auth_type) 850 { 851 struct wpa_driver_associate_params params; 852 struct ieee802_11_elems elems; 853 #ifdef CONFIG_HT_OVERRIDES 854 struct ieee80211_ht_capabilities htcaps; 855 struct ieee80211_ht_capabilities htcaps_mask; 856 #endif /* CONFIG_HT_OVERRIDES */ 857 #ifdef CONFIG_VHT_OVERRIDES 858 struct ieee80211_vht_capabilities vhtcaps; 859 struct ieee80211_vht_capabilities vhtcaps_mask; 860 #endif /* CONFIG_VHT_OVERRIDES */ 861 862 os_memset(¶ms, 0, sizeof(params)); 863 params.bssid = bssid; 864 params.ssid = wpa_s->sme.ssid; 865 params.ssid_len = wpa_s->sme.ssid_len; 866 params.freq.freq = wpa_s->sme.freq; 867 params.bg_scan_period = wpa_s->current_ssid ? 868 wpa_s->current_ssid->bg_scan_period : -1; 869 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ? 870 wpa_s->sme.assoc_req_ie : NULL; 871 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len; 872 params.pairwise_suite = wpa_s->pairwise_cipher; 873 params.group_suite = wpa_s->group_cipher; 874 params.key_mgmt_suite = wpa_s->key_mgmt; 875 params.wpa_proto = wpa_s->wpa_proto; 876 #ifdef CONFIG_HT_OVERRIDES 877 os_memset(&htcaps, 0, sizeof(htcaps)); 878 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask)); 879 params.htcaps = (u8 *) &htcaps; 880 params.htcaps_mask = (u8 *) &htcaps_mask; 881 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); 882 #endif /* CONFIG_HT_OVERRIDES */ 883 #ifdef CONFIG_VHT_OVERRIDES 884 os_memset(&vhtcaps, 0, sizeof(vhtcaps)); 885 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask)); 886 params.vhtcaps = &vhtcaps; 887 params.vhtcaps_mask = &vhtcaps_mask; 888 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); 889 #endif /* CONFIG_VHT_OVERRIDES */ 890 #ifdef CONFIG_IEEE80211R 891 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) { 892 params.wpa_ie = wpa_s->sme.ft_ies; 893 params.wpa_ie_len = wpa_s->sme.ft_ies_len; 894 } 895 #endif /* CONFIG_IEEE80211R */ 896 params.mode = mode; 897 params.mgmt_frame_protection = wpa_s->sme.mfp; 898 params.rrm_used = wpa_s->rrm.rrm_used; 899 if (wpa_s->sme.prev_bssid_set) 900 params.prev_bssid = wpa_s->sme.prev_bssid; 901 902 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR 903 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), 904 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "", 905 params.freq.freq); 906 907 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING); 908 909 if (params.wpa_ie == NULL || 910 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0) 911 < 0) { 912 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!"); 913 os_memset(&elems, 0, sizeof(elems)); 914 } 915 if (elems.rsn_ie) { 916 params.wpa_proto = WPA_PROTO_RSN; 917 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2, 918 elems.rsn_ie_len + 2); 919 } else if (elems.wpa_ie) { 920 params.wpa_proto = WPA_PROTO_WPA; 921 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2, 922 elems.wpa_ie_len + 2); 923 } else if (elems.osen) { 924 params.wpa_proto = WPA_PROTO_OSEN; 925 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2, 926 elems.osen_len + 2); 927 } else 928 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 929 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group) 930 params.p2p = 1; 931 932 if (wpa_s->parent->set_sta_uapsd) 933 params.uapsd = wpa_s->parent->sta_uapsd; 934 else 935 params.uapsd = -1; 936 937 if (wpa_drv_associate(wpa_s, ¶ms) < 0) { 938 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the " 939 "driver failed"); 940 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 941 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 942 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 943 return; 944 } 945 946 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s, 947 NULL); 948 } 949 950 951 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md, 952 const u8 *ies, size_t ies_len) 953 { 954 if (md == NULL || ies == NULL) { 955 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain"); 956 os_free(wpa_s->sme.ft_ies); 957 wpa_s->sme.ft_ies = NULL; 958 wpa_s->sme.ft_ies_len = 0; 959 wpa_s->sme.ft_used = 0; 960 return 0; 961 } 962 963 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); 964 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len); 965 os_free(wpa_s->sme.ft_ies); 966 wpa_s->sme.ft_ies = os_malloc(ies_len); 967 if (wpa_s->sme.ft_ies == NULL) 968 return -1; 969 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len); 970 wpa_s->sme.ft_ies_len = ies_len; 971 return 0; 972 } 973 974 975 static void sme_deauth(struct wpa_supplicant *wpa_s) 976 { 977 int bssid_changed; 978 979 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 980 981 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, 982 WLAN_REASON_DEAUTH_LEAVING) < 0) { 983 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver " 984 "failed"); 985 } 986 wpa_s->sme.prev_bssid_set = 0; 987 988 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 989 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 990 os_memset(wpa_s->bssid, 0, ETH_ALEN); 991 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 992 if (bssid_changed) 993 wpas_notify_bssid_changed(wpa_s); 994 } 995 996 997 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s, 998 union wpa_event_data *data) 999 { 1000 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: " 1001 "status code %d", MAC2STR(wpa_s->pending_bssid), 1002 data->assoc_reject.status_code); 1003 1004 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 1005 1006 #ifdef CONFIG_SAE 1007 if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid && 1008 wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) { 1009 wpa_dbg(wpa_s, MSG_DEBUG, 1010 "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication"); 1011 wpa_sm_aborted_cached(wpa_s->wpa); 1012 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid); 1013 if (wpa_s->current_bss) { 1014 struct wpa_bss *bss = wpa_s->current_bss; 1015 struct wpa_ssid *ssid = wpa_s->current_ssid; 1016 1017 wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, 1018 WLAN_REASON_DEAUTH_LEAVING); 1019 wpas_connect_work_done(wpa_s); 1020 wpa_supplicant_mark_disassoc(wpa_s); 1021 wpa_supplicant_connect(wpa_s, bss, ssid); 1022 return; 1023 } 1024 } 1025 #endif /* CONFIG_SAE */ 1026 1027 /* 1028 * For now, unconditionally terminate the previous authentication. In 1029 * theory, this should not be needed, but mac80211 gets quite confused 1030 * if the authentication is left pending.. Some roaming cases might 1031 * benefit from using the previous authentication, so this could be 1032 * optimized in the future. 1033 */ 1034 sme_deauth(wpa_s); 1035 } 1036 1037 1038 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s, 1039 union wpa_event_data *data) 1040 { 1041 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out"); 1042 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 1043 wpa_supplicant_mark_disassoc(wpa_s); 1044 } 1045 1046 1047 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s, 1048 union wpa_event_data *data) 1049 { 1050 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out"); 1051 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 1052 wpa_supplicant_mark_disassoc(wpa_s); 1053 } 1054 1055 1056 void sme_event_disassoc(struct wpa_supplicant *wpa_s, 1057 struct disassoc_info *info) 1058 { 1059 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received"); 1060 if (wpa_s->sme.prev_bssid_set) { 1061 /* 1062 * cfg80211/mac80211 can get into somewhat confused state if 1063 * the AP only disassociates us and leaves us in authenticated 1064 * state. For now, force the state to be cleared to avoid 1065 * confusing errors if we try to associate with the AP again. 1066 */ 1067 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear " 1068 "driver state"); 1069 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid, 1070 WLAN_REASON_DEAUTH_LEAVING); 1071 } 1072 } 1073 1074 1075 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx) 1076 { 1077 struct wpa_supplicant *wpa_s = eloop_ctx; 1078 if (wpa_s->wpa_state == WPA_AUTHENTICATING) { 1079 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout"); 1080 sme_deauth(wpa_s); 1081 } 1082 } 1083 1084 1085 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx) 1086 { 1087 struct wpa_supplicant *wpa_s = eloop_ctx; 1088 if (wpa_s->wpa_state == WPA_ASSOCIATING) { 1089 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout"); 1090 sme_deauth(wpa_s); 1091 } 1092 } 1093 1094 1095 void sme_state_changed(struct wpa_supplicant *wpa_s) 1096 { 1097 /* Make sure timers are cleaned up appropriately. */ 1098 if (wpa_s->wpa_state != WPA_ASSOCIATING) 1099 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 1100 if (wpa_s->wpa_state != WPA_AUTHENTICATING) 1101 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 1102 } 1103 1104 1105 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s, 1106 const u8 *prev_pending_bssid) 1107 { 1108 /* 1109 * mac80211-workaround to force deauth on failed auth cmd, 1110 * requires us to remain in authenticating state to allow the 1111 * second authentication attempt to be continued properly. 1112 */ 1113 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication " 1114 "to proceed after disconnection event"); 1115 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); 1116 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN); 1117 1118 /* 1119 * Re-arm authentication timer in case auth fails for whatever reason. 1120 */ 1121 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 1122 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, 1123 NULL); 1124 } 1125 1126 1127 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s) 1128 { 1129 wpa_s->sme.prev_bssid_set = 0; 1130 #ifdef CONFIG_SAE 1131 wpabuf_free(wpa_s->sme.sae_token); 1132 wpa_s->sme.sae_token = NULL; 1133 sae_clear_data(&wpa_s->sme.sae); 1134 #endif /* CONFIG_SAE */ 1135 #ifdef CONFIG_IEEE80211R 1136 if (wpa_s->sme.ft_ies) 1137 sme_update_ft_ies(wpa_s, NULL, NULL, 0); 1138 #endif /* CONFIG_IEEE80211R */ 1139 } 1140 1141 1142 void sme_deinit(struct wpa_supplicant *wpa_s) 1143 { 1144 os_free(wpa_s->sme.ft_ies); 1145 wpa_s->sme.ft_ies = NULL; 1146 wpa_s->sme.ft_ies_len = 0; 1147 #ifdef CONFIG_IEEE80211W 1148 sme_stop_sa_query(wpa_s); 1149 #endif /* CONFIG_IEEE80211W */ 1150 sme_clear_on_disassoc(wpa_s); 1151 1152 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); 1153 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); 1154 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 1155 } 1156 1157 1158 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s, 1159 const u8 *chan_list, u8 num_channels, 1160 u8 num_intol) 1161 { 1162 struct ieee80211_2040_bss_coex_ie *bc_ie; 1163 struct ieee80211_2040_intol_chan_report *ic_report; 1164 struct wpabuf *buf; 1165 1166 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR 1167 " (num_channels=%u num_intol=%u)", 1168 MAC2STR(wpa_s->bssid), num_channels, num_intol); 1169 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels", 1170 chan_list, num_channels); 1171 1172 buf = wpabuf_alloc(2 + /* action.category + action_code */ 1173 sizeof(struct ieee80211_2040_bss_coex_ie) + 1174 sizeof(struct ieee80211_2040_intol_chan_report) + 1175 num_channels); 1176 if (buf == NULL) 1177 return; 1178 1179 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC); 1180 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX); 1181 1182 bc_ie = wpabuf_put(buf, sizeof(*bc_ie)); 1183 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE; 1184 bc_ie->length = 1; 1185 if (num_intol) 1186 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ; 1187 1188 if (num_channels > 0) { 1189 ic_report = wpabuf_put(buf, sizeof(*ic_report)); 1190 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT; 1191 ic_report->length = num_channels + 1; 1192 ic_report->op_class = 0; 1193 os_memcpy(wpabuf_put(buf, num_channels), chan_list, 1194 num_channels); 1195 } 1196 1197 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 1198 wpa_s->own_addr, wpa_s->bssid, 1199 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) { 1200 wpa_msg(wpa_s, MSG_INFO, 1201 "SME: Failed to send 20/40 BSS Coexistence frame"); 1202 } 1203 1204 wpabuf_free(buf); 1205 } 1206 1207 1208 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s) 1209 { 1210 struct wpa_bss *bss; 1211 const u8 *ie; 1212 u16 ht_cap; 1213 u8 chan_list[P2P_MAX_CHANNELS], channel; 1214 u8 num_channels = 0, num_intol = 0, i; 1215 1216 if (!wpa_s->sme.sched_obss_scan) 1217 return 0; 1218 1219 wpa_s->sme.sched_obss_scan = 0; 1220 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED) 1221 return 1; 1222 1223 /* 1224 * Check whether AP uses regulatory triplet or channel triplet in 1225 * country info. Right now the operating class of the BSS channel 1226 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12), 1227 * based on the assumption that operating class triplet is not used in 1228 * beacon frame. If the First Channel Number/Operating Extension 1229 * Identifier octet has a positive integer value of 201 or greater, 1230 * then its operating class triplet. 1231 * 1232 * TODO: If Supported Operating Classes element is present in beacon 1233 * frame, have to lookup operating class in Annex E and fill them in 1234 * 2040 coex frame. 1235 */ 1236 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); 1237 if (ie && (ie[1] >= 6) && (ie[5] >= 201)) 1238 return 1; 1239 1240 os_memset(chan_list, 0, sizeof(chan_list)); 1241 1242 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 1243 /* Skip other band bss */ 1244 enum hostapd_hw_mode mode; 1245 mode = ieee80211_freq_to_chan(bss->freq, &channel); 1246 if (mode != HOSTAPD_MODE_IEEE80211G && 1247 mode != HOSTAPD_MODE_IEEE80211B) 1248 continue; 1249 1250 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP); 1251 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0; 1252 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR 1253 " freq=%u chan=%u ht_cap=0x%x", 1254 MAC2STR(bss->bssid), bss->freq, channel, ht_cap); 1255 1256 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) { 1257 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT) 1258 num_intol++; 1259 1260 /* Check whether the channel is already considered */ 1261 for (i = 0; i < num_channels; i++) { 1262 if (channel == chan_list[i]) 1263 break; 1264 } 1265 if (i != num_channels) 1266 continue; 1267 1268 chan_list[num_channels++] = channel; 1269 } 1270 } 1271 1272 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol); 1273 return 1; 1274 } 1275 1276 1277 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes, 1278 u16 num_modes, 1279 enum hostapd_hw_mode mode) 1280 { 1281 u16 i; 1282 1283 for (i = 0; i < num_modes; i++) { 1284 if (modes[i].mode == mode) 1285 return &modes[i]; 1286 } 1287 1288 return NULL; 1289 } 1290 1291 1292 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s, 1293 struct wpa_driver_scan_params *params) 1294 { 1295 /* Include only affected channels */ 1296 struct hostapd_hw_modes *mode; 1297 int count, i; 1298 int start, end; 1299 1300 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, 1301 HOSTAPD_MODE_IEEE80211G); 1302 if (mode == NULL) { 1303 /* No channels supported in this band - use empty list */ 1304 params->freqs = os_zalloc(sizeof(int)); 1305 return; 1306 } 1307 1308 if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN && 1309 wpa_s->current_bss) { 1310 const u8 *ie; 1311 1312 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION); 1313 if (ie && ie[1] >= 2) { 1314 u8 o; 1315 1316 o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; 1317 if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) 1318 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE; 1319 else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) 1320 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW; 1321 } 1322 } 1323 1324 start = wpa_s->assoc_freq - 10; 1325 end = wpa_s->assoc_freq + 10; 1326 switch (wpa_s->sme.ht_sec_chan) { 1327 case HT_SEC_CHAN_UNKNOWN: 1328 /* HT40+ possible on channels 1..9 */ 1329 if (wpa_s->assoc_freq <= 2452) 1330 start -= 20; 1331 /* HT40- possible on channels 5-13 */ 1332 if (wpa_s->assoc_freq >= 2432) 1333 end += 20; 1334 break; 1335 case HT_SEC_CHAN_ABOVE: 1336 end += 20; 1337 break; 1338 case HT_SEC_CHAN_BELOW: 1339 start -= 20; 1340 break; 1341 } 1342 wpa_printf(MSG_DEBUG, 1343 "OBSS: assoc_freq %d possible affected range %d-%d", 1344 wpa_s->assoc_freq, start, end); 1345 1346 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); 1347 if (params->freqs == NULL) 1348 return; 1349 for (count = 0, i = 0; i < mode->num_channels; i++) { 1350 int freq; 1351 1352 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) 1353 continue; 1354 freq = mode->channels[i].freq; 1355 if (freq - 10 >= end || freq + 10 <= start) 1356 continue; /* not affected */ 1357 params->freqs[count++] = freq; 1358 } 1359 } 1360 1361 1362 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1363 { 1364 struct wpa_supplicant *wpa_s = eloop_ctx; 1365 struct wpa_driver_scan_params params; 1366 1367 if (!wpa_s->current_bss) { 1368 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request"); 1369 return; 1370 } 1371 1372 os_memset(¶ms, 0, sizeof(params)); 1373 wpa_obss_scan_freqs_list(wpa_s, ¶ms); 1374 params.low_priority = 1; 1375 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan"); 1376 1377 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms)) 1378 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan"); 1379 else 1380 wpa_s->sme.sched_obss_scan = 1; 1381 os_free(params.freqs); 1382 1383 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 1384 sme_obss_scan_timeout, wpa_s, NULL); 1385 } 1386 1387 1388 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable) 1389 { 1390 const u8 *ie; 1391 struct wpa_bss *bss = wpa_s->current_bss; 1392 struct wpa_ssid *ssid = wpa_s->current_ssid; 1393 struct hostapd_hw_modes *hw_mode = NULL; 1394 int i; 1395 1396 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); 1397 wpa_s->sme.sched_obss_scan = 0; 1398 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN; 1399 if (!enable) 1400 return; 1401 1402 /* 1403 * Schedule OBSS scan if driver is using station SME in wpa_supplicant 1404 * or it expects OBSS scan to be performed by wpa_supplicant. 1405 */ 1406 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || 1407 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) || 1408 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA) 1409 return; 1410 1411 if (!wpa_s->hw.modes) 1412 return; 1413 1414 /* only HT caps in 11g mode are relevant */ 1415 for (i = 0; i < wpa_s->hw.num_modes; i++) { 1416 hw_mode = &wpa_s->hw.modes[i]; 1417 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G) 1418 break; 1419 } 1420 1421 /* Driver does not support HT40 for 11g or doesn't have 11g. */ 1422 if (i == wpa_s->hw.num_modes || !hw_mode || 1423 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 1424 return; 1425 1426 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500) 1427 return; /* Not associated on 2.4 GHz band */ 1428 1429 /* Check whether AP supports HT40 */ 1430 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP); 1431 if (!ie || ie[1] < 2 || 1432 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) 1433 return; /* AP does not support HT40 */ 1434 1435 ie = wpa_bss_get_ie(wpa_s->current_bss, 1436 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS); 1437 if (!ie || ie[1] < 14) 1438 return; /* AP does not request OBSS scans */ 1439 1440 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6); 1441 if (wpa_s->sme.obss_scan_int < 10) { 1442 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u " 1443 "replaced with the minimum 10 sec", 1444 wpa_s->sme.obss_scan_int); 1445 wpa_s->sme.obss_scan_int = 10; 1446 } 1447 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec", 1448 wpa_s->sme.obss_scan_int); 1449 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, 1450 sme_obss_scan_timeout, wpa_s, NULL); 1451 } 1452 1453 1454 #ifdef CONFIG_IEEE80211W 1455 1456 static const unsigned int sa_query_max_timeout = 1000; 1457 static const unsigned int sa_query_retry_timeout = 201; 1458 1459 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s) 1460 { 1461 u32 tu; 1462 struct os_reltime now, passed; 1463 os_get_reltime(&now); 1464 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed); 1465 tu = (passed.sec * 1000000 + passed.usec) / 1024; 1466 if (sa_query_max_timeout < tu) { 1467 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out"); 1468 sme_stop_sa_query(wpa_s); 1469 wpa_supplicant_deauthenticate( 1470 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID); 1471 return 1; 1472 } 1473 1474 return 0; 1475 } 1476 1477 1478 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s, 1479 const u8 *trans_id) 1480 { 1481 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN]; 1482 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to " 1483 MACSTR, MAC2STR(wpa_s->bssid)); 1484 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID", 1485 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1486 req[0] = WLAN_ACTION_SA_QUERY; 1487 req[1] = WLAN_SA_QUERY_REQUEST; 1488 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN); 1489 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 1490 wpa_s->own_addr, wpa_s->bssid, 1491 req, sizeof(req), 0) < 0) 1492 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query " 1493 "Request"); 1494 } 1495 1496 1497 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx) 1498 { 1499 struct wpa_supplicant *wpa_s = eloop_ctx; 1500 unsigned int timeout, sec, usec; 1501 u8 *trans_id, *nbuf; 1502 1503 if (wpa_s->sme.sa_query_count > 0 && 1504 sme_check_sa_query_timeout(wpa_s)) 1505 return; 1506 1507 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id, 1508 wpa_s->sme.sa_query_count + 1, 1509 WLAN_SA_QUERY_TR_ID_LEN); 1510 if (nbuf == NULL) 1511 return; 1512 if (wpa_s->sme.sa_query_count == 0) { 1513 /* Starting a new SA Query procedure */ 1514 os_get_reltime(&wpa_s->sme.sa_query_start); 1515 } 1516 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN; 1517 wpa_s->sme.sa_query_trans_id = nbuf; 1518 wpa_s->sme.sa_query_count++; 1519 1520 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) { 1521 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID"); 1522 return; 1523 } 1524 1525 timeout = sa_query_retry_timeout; 1526 sec = ((timeout / 1000) * 1024) / 1000; 1527 usec = (timeout % 1000) * 1024; 1528 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL); 1529 1530 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d", 1531 wpa_s->sme.sa_query_count); 1532 1533 sme_send_sa_query_req(wpa_s, trans_id); 1534 } 1535 1536 1537 static void sme_start_sa_query(struct wpa_supplicant *wpa_s) 1538 { 1539 sme_sa_query_timer(wpa_s, NULL); 1540 } 1541 1542 1543 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s) 1544 { 1545 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL); 1546 os_free(wpa_s->sme.sa_query_trans_id); 1547 wpa_s->sme.sa_query_trans_id = NULL; 1548 wpa_s->sme.sa_query_count = 0; 1549 } 1550 1551 1552 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa, 1553 const u8 *da, u16 reason_code) 1554 { 1555 struct wpa_ssid *ssid; 1556 struct os_reltime now; 1557 1558 if (wpa_s->wpa_state != WPA_COMPLETED) 1559 return; 1560 ssid = wpa_s->current_ssid; 1561 if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION) 1562 return; 1563 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1564 return; 1565 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA && 1566 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA) 1567 return; 1568 if (wpa_s->sme.sa_query_count > 0) 1569 return; 1570 1571 os_get_reltime(&now); 1572 if (wpa_s->sme.last_unprot_disconnect.sec && 1573 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10)) 1574 return; /* limit SA Query procedure frequency */ 1575 wpa_s->sme.last_unprot_disconnect = now; 1576 1577 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - " 1578 "possible AP/STA state mismatch - trigger SA Query"); 1579 sme_start_sa_query(wpa_s); 1580 } 1581 1582 1583 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa, 1584 const u8 *data, size_t len) 1585 { 1586 int i; 1587 1588 if (wpa_s->sme.sa_query_trans_id == NULL || 1589 len < 1 + WLAN_SA_QUERY_TR_ID_LEN || 1590 data[0] != WLAN_SA_QUERY_RESPONSE) 1591 return; 1592 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from " 1593 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]); 1594 1595 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) 1596 return; 1597 1598 for (i = 0; i < wpa_s->sme.sa_query_count; i++) { 1599 if (os_memcmp(wpa_s->sme.sa_query_trans_id + 1600 i * WLAN_SA_QUERY_TR_ID_LEN, 1601 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0) 1602 break; 1603 } 1604 1605 if (i >= wpa_s->sme.sa_query_count) { 1606 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query " 1607 "transaction identifier found"); 1608 return; 1609 } 1610 1611 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received " 1612 "from " MACSTR, MAC2STR(sa)); 1613 sme_stop_sa_query(wpa_s); 1614 } 1615 1616 #endif /* CONFIG_IEEE80211W */ 1617