1 /* 2 * wpa_supplicant / WPS integration 3 * Copyright (c) 2008, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #include "includes.h" 16 17 #include "common.h" 18 #include "ieee802_11_defs.h" 19 #include "wpa_common.h" 20 #include "config.h" 21 #include "eap_peer/eap.h" 22 #include "wpa_supplicant_i.h" 23 #include "eloop.h" 24 #include "uuid.h" 25 #include "wpa_ctrl.h" 26 #include "ctrl_iface_dbus.h" 27 #include "eap_common/eap_wsc_common.h" 28 #include "blacklist.h" 29 #include "wps_supplicant.h" 30 31 #define WPS_PIN_SCAN_IGNORE_SEL_REG 3 32 33 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx); 34 static void wpas_clear_wps(struct wpa_supplicant *wpa_s); 35 36 37 int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s) 38 { 39 if (!wpa_s->wps_success && 40 wpa_s->current_ssid && 41 eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) { 42 const u8 *bssid = wpa_s->bssid; 43 if (is_zero_ether_addr(bssid)) 44 bssid = wpa_s->pending_bssid; 45 46 wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR 47 " did not succeed - continue trying to find " 48 "suitable AP", MAC2STR(bssid)); 49 wpa_blacklist_add(wpa_s, bssid); 50 51 wpa_supplicant_deauthenticate(wpa_s, 52 WLAN_REASON_DEAUTH_LEAVING); 53 wpa_s->reassociate = 1; 54 wpa_supplicant_req_scan(wpa_s, 55 wpa_s->blacklist_cleared ? 5 : 0, 0); 56 wpa_s->blacklist_cleared = 0; 57 return 1; 58 } 59 60 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL); 61 62 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid && 63 !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) { 64 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - " 65 "try to associate with the received credential"); 66 wpa_supplicant_deauthenticate(wpa_s, 67 WLAN_REASON_DEAUTH_LEAVING); 68 wpa_s->reassociate = 1; 69 wpa_supplicant_req_scan(wpa_s, 0, 0); 70 return 1; 71 } 72 73 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) { 74 wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting " 75 "for external credential processing"); 76 wpas_clear_wps(wpa_s); 77 wpa_supplicant_deauthenticate(wpa_s, 78 WLAN_REASON_DEAUTH_LEAVING); 79 return 1; 80 } 81 82 return 0; 83 } 84 85 86 static int wpa_supplicant_wps_cred(void *ctx, 87 const struct wps_credential *cred) 88 { 89 struct wpa_supplicant *wpa_s = ctx; 90 struct wpa_ssid *ssid = wpa_s->current_ssid; 91 92 if ((wpa_s->conf->wps_cred_processing == 1 || 93 wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) { 94 size_t blen = cred->cred_attr_len * 2 + 1; 95 char *buf = os_malloc(blen); 96 if (buf) { 97 wpa_snprintf_hex(buf, blen, 98 cred->cred_attr, cred->cred_attr_len); 99 wpa_msg(wpa_s, MSG_INFO, "%s%s", 100 WPS_EVENT_CRED_RECEIVED, buf); 101 os_free(buf); 102 } 103 wpa_supplicant_dbus_notify_wps_cred(wpa_s, cred); 104 } else 105 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED); 106 107 wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute", 108 cred->cred_attr, cred->cred_attr_len); 109 110 if (wpa_s->conf->wps_cred_processing == 1) 111 return 0; 112 113 if (cred->auth_type != WPS_AUTH_OPEN && 114 cred->auth_type != WPS_AUTH_SHARED && 115 cred->auth_type != WPS_AUTH_WPAPSK && 116 cred->auth_type != WPS_AUTH_WPA2PSK) { 117 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for " 118 "unsupported authentication type %d", 119 cred->auth_type); 120 return 0; 121 } 122 123 if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) { 124 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based " 125 "on the received credential"); 126 os_free(ssid->eap.identity); 127 ssid->eap.identity = NULL; 128 ssid->eap.identity_len = 0; 129 os_free(ssid->eap.phase1); 130 ssid->eap.phase1 = NULL; 131 os_free(ssid->eap.eap_methods); 132 ssid->eap.eap_methods = NULL; 133 } else { 134 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the " 135 "received credential"); 136 ssid = wpa_config_add_network(wpa_s->conf); 137 if (ssid == NULL) 138 return -1; 139 } 140 141 wpa_config_set_network_defaults(ssid); 142 143 os_free(ssid->ssid); 144 ssid->ssid = os_malloc(cred->ssid_len); 145 if (ssid->ssid) { 146 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len); 147 ssid->ssid_len = cred->ssid_len; 148 } 149 150 switch (cred->encr_type) { 151 case WPS_ENCR_NONE: 152 break; 153 case WPS_ENCR_WEP: 154 if (cred->key_len > 0 && cred->key_len <= MAX_WEP_KEY_LEN && 155 cred->key_idx < NUM_WEP_KEYS) { 156 os_memcpy(ssid->wep_key[cred->key_idx], cred->key, 157 cred->key_len); 158 ssid->wep_key_len[cred->key_idx] = cred->key_len; 159 ssid->wep_tx_keyidx = cred->key_idx; 160 } 161 break; 162 case WPS_ENCR_TKIP: 163 ssid->pairwise_cipher = WPA_CIPHER_TKIP; 164 break; 165 case WPS_ENCR_AES: 166 ssid->pairwise_cipher = WPA_CIPHER_CCMP; 167 break; 168 } 169 170 switch (cred->auth_type) { 171 case WPS_AUTH_OPEN: 172 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 173 ssid->key_mgmt = WPA_KEY_MGMT_NONE; 174 ssid->proto = 0; 175 break; 176 case WPS_AUTH_SHARED: 177 ssid->auth_alg = WPA_AUTH_ALG_SHARED; 178 ssid->key_mgmt = WPA_KEY_MGMT_NONE; 179 ssid->proto = 0; 180 break; 181 case WPS_AUTH_WPAPSK: 182 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 183 ssid->key_mgmt = WPA_KEY_MGMT_PSK; 184 ssid->proto = WPA_PROTO_WPA; 185 break; 186 case WPS_AUTH_WPA: 187 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 188 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 189 ssid->proto = WPA_PROTO_WPA; 190 break; 191 case WPS_AUTH_WPA2: 192 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 193 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 194 ssid->proto = WPA_PROTO_RSN; 195 break; 196 case WPS_AUTH_WPA2PSK: 197 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 198 ssid->key_mgmt = WPA_KEY_MGMT_PSK; 199 ssid->proto = WPA_PROTO_RSN; 200 break; 201 } 202 203 if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) { 204 if (cred->key_len == 2 * PMK_LEN) { 205 if (hexstr2bin((const char *) cred->key, ssid->psk, 206 PMK_LEN)) { 207 wpa_printf(MSG_ERROR, "WPS: Invalid Network " 208 "Key"); 209 return -1; 210 } 211 ssid->psk_set = 1; 212 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) { 213 os_free(ssid->passphrase); 214 ssid->passphrase = os_malloc(cred->key_len + 1); 215 if (ssid->passphrase == NULL) 216 return -1; 217 os_memcpy(ssid->passphrase, cred->key, cred->key_len); 218 ssid->passphrase[cred->key_len] = '\0'; 219 wpa_config_update_psk(ssid); 220 } else { 221 wpa_printf(MSG_ERROR, "WPS: Invalid Network Key " 222 "length %lu", 223 (unsigned long) cred->key_len); 224 return -1; 225 } 226 } 227 228 #ifndef CONFIG_NO_CONFIG_WRITE 229 if (wpa_s->conf->update_config && 230 wpa_config_write(wpa_s->confname, wpa_s->conf)) { 231 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration"); 232 return -1; 233 } 234 #endif /* CONFIG_NO_CONFIG_WRITE */ 235 236 return 0; 237 } 238 239 240 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s, 241 struct wps_event_m2d *m2d) 242 { 243 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D 244 "dev_password_id=%d config_error=%d", 245 m2d->dev_password_id, m2d->config_error); 246 } 247 248 249 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s, 250 struct wps_event_fail *fail) 251 { 252 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg); 253 wpas_clear_wps(wpa_s); 254 } 255 256 257 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s) 258 { 259 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS); 260 wpa_s->wps_success = 1; 261 } 262 263 264 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event, 265 union wps_event_data *data) 266 { 267 struct wpa_supplicant *wpa_s = ctx; 268 switch (event) { 269 case WPS_EV_M2D: 270 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d); 271 break; 272 case WPS_EV_FAIL: 273 wpa_supplicant_wps_event_fail(wpa_s, &data->fail); 274 break; 275 case WPS_EV_SUCCESS: 276 wpa_supplicant_wps_event_success(wpa_s); 277 break; 278 case WPS_EV_PWD_AUTH_FAIL: 279 break; 280 } 281 } 282 283 284 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid) 285 { 286 if (eap_is_wps_pbc_enrollee(&ssid->eap) || 287 eap_is_wps_pin_enrollee(&ssid->eap)) 288 return WPS_REQ_ENROLLEE; 289 else 290 return WPS_REQ_REGISTRAR; 291 } 292 293 294 static void wpas_clear_wps(struct wpa_supplicant *wpa_s) 295 { 296 int id; 297 struct wpa_ssid *ssid; 298 299 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL); 300 301 /* Remove any existing WPS network from configuration */ 302 ssid = wpa_s->conf->ssid; 303 while (ssid) { 304 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 305 if (ssid == wpa_s->current_ssid) 306 wpa_s->current_ssid = NULL; 307 id = ssid->id; 308 } else 309 id = -1; 310 ssid = ssid->next; 311 if (id >= 0) 312 wpa_config_remove_network(wpa_s->conf, id); 313 } 314 } 315 316 317 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx) 318 { 319 struct wpa_supplicant *wpa_s = eloop_ctx; 320 wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed " 321 "out"); 322 wpas_clear_wps(wpa_s); 323 } 324 325 326 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s, 327 int registrar, const u8 *bssid) 328 { 329 struct wpa_ssid *ssid; 330 331 ssid = wpa_config_add_network(wpa_s->conf); 332 if (ssid == NULL) 333 return NULL; 334 wpa_config_set_network_defaults(ssid); 335 if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 || 336 wpa_config_set(ssid, "eap", "WSC", 0) < 0 || 337 wpa_config_set(ssid, "identity", registrar ? 338 "\"" WSC_ID_REGISTRAR "\"" : 339 "\"" WSC_ID_ENROLLEE "\"", 0) < 0) { 340 wpa_config_remove_network(wpa_s->conf, ssid->id); 341 return NULL; 342 } 343 344 if (bssid) { 345 size_t i; 346 struct wpa_scan_res *res; 347 348 os_memcpy(ssid->bssid, bssid, ETH_ALEN); 349 ssid->bssid_set = 1; 350 351 /* Try to get SSID from scan results */ 352 if (wpa_s->scan_res == NULL && 353 wpa_supplicant_get_scan_results(wpa_s) < 0) 354 return ssid; /* Could not find any scan results */ 355 356 for (i = 0; i < wpa_s->scan_res->num; i++) { 357 const u8 *ie; 358 359 res = wpa_s->scan_res->res[i]; 360 if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0) 361 continue; 362 363 ie = wpa_scan_get_ie(res, WLAN_EID_SSID); 364 if (ie == NULL) 365 break; 366 os_free(ssid->ssid); 367 ssid->ssid = os_malloc(ie[1]); 368 if (ssid->ssid == NULL) 369 break; 370 os_memcpy(ssid->ssid, ie + 2, ie[1]); 371 ssid->ssid_len = ie[1]; 372 break; 373 } 374 } 375 376 return ssid; 377 } 378 379 380 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s, 381 struct wpa_ssid *selected) 382 { 383 struct wpa_ssid *ssid; 384 385 /* Mark all other networks disabled and trigger reassociation */ 386 ssid = wpa_s->conf->ssid; 387 while (ssid) { 388 ssid->disabled = ssid != selected; 389 ssid = ssid->next; 390 } 391 wpa_s->disconnected = 0; 392 wpa_s->reassociate = 1; 393 wpa_s->scan_runs = 0; 394 wpa_s->wps_success = 0; 395 wpa_s->blacklist_cleared = 0; 396 wpa_supplicant_req_scan(wpa_s, 0, 0); 397 } 398 399 400 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid) 401 { 402 struct wpa_ssid *ssid; 403 wpas_clear_wps(wpa_s); 404 ssid = wpas_wps_add_network(wpa_s, 0, bssid); 405 if (ssid == NULL) 406 return -1; 407 wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0); 408 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout, 409 wpa_s, NULL); 410 wpas_wps_reassoc(wpa_s, ssid); 411 return 0; 412 } 413 414 415 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid, 416 const char *pin) 417 { 418 struct wpa_ssid *ssid; 419 char val[30]; 420 unsigned int rpin = 0; 421 422 wpas_clear_wps(wpa_s); 423 ssid = wpas_wps_add_network(wpa_s, 0, bssid); 424 if (ssid == NULL) 425 return -1; 426 if (pin) 427 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin); 428 else { 429 rpin = wps_generate_pin(); 430 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin); 431 } 432 wpa_config_set(ssid, "phase1", val, 0); 433 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout, 434 wpa_s, NULL); 435 wpas_wps_reassoc(wpa_s, ssid); 436 return rpin; 437 } 438 439 440 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid, 441 const char *pin) 442 { 443 struct wpa_ssid *ssid; 444 char val[30]; 445 446 if (!pin) 447 return -1; 448 wpas_clear_wps(wpa_s); 449 ssid = wpas_wps_add_network(wpa_s, 1, bssid); 450 if (ssid == NULL) 451 return -1; 452 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin); 453 wpa_config_set(ssid, "phase1", val, 0); 454 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout, 455 wpa_s, NULL); 456 wpas_wps_reassoc(wpa_s, ssid); 457 return 0; 458 } 459 460 461 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk, 462 size_t psk_len) 463 { 464 wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for " 465 "STA " MACSTR, MAC2STR(mac_addr)); 466 wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len); 467 468 /* TODO */ 469 470 return 0; 471 } 472 473 474 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e, 475 const struct wps_device_data *dev) 476 { 477 char uuid[40], txt[400]; 478 int len; 479 if (uuid_bin2str(uuid_e, uuid, sizeof(uuid))) 480 return; 481 wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid); 482 len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR 483 " [%s|%s|%s|%s|%s|%d-%08X-%d]", 484 uuid, MAC2STR(dev->mac_addr), dev->device_name, 485 dev->manufacturer, dev->model_name, 486 dev->model_number, dev->serial_number, 487 dev->categ, dev->oui, dev->sub_categ); 488 if (len > 0 && len < (int) sizeof(txt)) 489 wpa_printf(MSG_INFO, "%s", txt); 490 } 491 492 493 int wpas_wps_init(struct wpa_supplicant *wpa_s) 494 { 495 struct wps_context *wps; 496 struct wps_registrar_config rcfg; 497 498 wps = os_zalloc(sizeof(*wps)); 499 if (wps == NULL) 500 return -1; 501 502 wps->cred_cb = wpa_supplicant_wps_cred; 503 wps->event_cb = wpa_supplicant_wps_event; 504 wps->cb_ctx = wpa_s; 505 506 wps->dev.device_name = wpa_s->conf->device_name; 507 wps->dev.manufacturer = wpa_s->conf->manufacturer; 508 wps->dev.model_name = wpa_s->conf->model_name; 509 wps->dev.model_number = wpa_s->conf->model_number; 510 wps->dev.serial_number = wpa_s->conf->serial_number; 511 if (wpa_s->conf->device_type) { 512 char *pos; 513 u8 oui[4]; 514 /* <categ>-<OUI>-<subcateg> */ 515 wps->dev.categ = atoi(wpa_s->conf->device_type); 516 pos = os_strchr(wpa_s->conf->device_type, '-'); 517 if (pos == NULL) { 518 wpa_printf(MSG_ERROR, "WPS: Invalid device_type"); 519 os_free(wps); 520 return -1; 521 } 522 pos++; 523 if (hexstr2bin(pos, oui, 4)) { 524 wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI"); 525 os_free(wps); 526 return -1; 527 } 528 wps->dev.oui = WPA_GET_BE32(oui); 529 pos = os_strchr(pos, '-'); 530 if (pos == NULL) { 531 wpa_printf(MSG_ERROR, "WPS: Invalid device_type"); 532 os_free(wps); 533 return -1; 534 } 535 pos++; 536 wps->dev.sub_categ = atoi(pos); 537 } 538 wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version); 539 wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */ 540 os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN); 541 if (is_nil_uuid(wpa_s->conf->uuid)) { 542 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid); 543 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address", 544 wps->uuid, WPS_UUID_LEN); 545 } else 546 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN); 547 548 wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK; 549 wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP; 550 551 os_memset(&rcfg, 0, sizeof(rcfg)); 552 rcfg.new_psk_cb = wpas_wps_new_psk_cb; 553 rcfg.pin_needed_cb = wpas_wps_pin_needed_cb; 554 rcfg.cb_ctx = wpa_s; 555 556 wps->registrar = wps_registrar_init(wps, &rcfg); 557 if (wps->registrar == NULL) { 558 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar"); 559 os_free(wps); 560 return -1; 561 } 562 563 wpa_s->wps = wps; 564 565 return 0; 566 } 567 568 569 void wpas_wps_deinit(struct wpa_supplicant *wpa_s) 570 { 571 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL); 572 573 if (wpa_s->wps == NULL) 574 return; 575 576 wps_registrar_deinit(wpa_s->wps->registrar); 577 os_free(wpa_s->wps->network_key); 578 os_free(wpa_s->wps); 579 wpa_s->wps = NULL; 580 } 581 582 583 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s, 584 struct wpa_ssid *ssid, struct wpa_scan_res *bss) 585 { 586 struct wpabuf *wps_ie; 587 588 if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS)) 589 return -1; 590 591 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 592 if (eap_is_wps_pbc_enrollee(&ssid->eap)) { 593 if (!wps_ie) { 594 wpa_printf(MSG_DEBUG, " skip - non-WPS AP"); 595 return 0; 596 } 597 598 if (!wps_is_selected_pbc_registrar(wps_ie)) { 599 wpa_printf(MSG_DEBUG, " skip - WPS AP " 600 "without active PBC Registrar"); 601 wpabuf_free(wps_ie); 602 return 0; 603 } 604 605 /* TODO: overlap detection */ 606 wpa_printf(MSG_DEBUG, " selected based on WPS IE " 607 "(Active PBC)"); 608 wpabuf_free(wps_ie); 609 return 1; 610 } 611 612 if (eap_is_wps_pin_enrollee(&ssid->eap)) { 613 if (!wps_ie) { 614 wpa_printf(MSG_DEBUG, " skip - non-WPS AP"); 615 return 0; 616 } 617 618 /* 619 * Start with WPS APs that advertise active PIN Registrar and 620 * allow any WPS AP after third scan since some APs do not set 621 * Selected Registrar attribute properly when using external 622 * Registrar. 623 */ 624 if (!wps_is_selected_pin_registrar(wps_ie)) { 625 if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) { 626 wpa_printf(MSG_DEBUG, " skip - WPS AP " 627 "without active PIN Registrar"); 628 wpabuf_free(wps_ie); 629 return 0; 630 } 631 wpa_printf(MSG_DEBUG, " selected based on WPS IE"); 632 } else { 633 wpa_printf(MSG_DEBUG, " selected based on WPS IE " 634 "(Active PIN)"); 635 } 636 wpabuf_free(wps_ie); 637 return 1; 638 } 639 640 if (wps_ie) { 641 wpa_printf(MSG_DEBUG, " selected based on WPS IE"); 642 wpabuf_free(wps_ie); 643 return 1; 644 } 645 646 return -1; 647 } 648 649 650 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s, 651 struct wpa_ssid *ssid, 652 struct wpa_scan_res *bss) 653 { 654 struct wpabuf *wps_ie = NULL; 655 int ret = 0; 656 657 if (eap_is_wps_pbc_enrollee(&ssid->eap)) { 658 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 659 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) { 660 /* allow wildcard SSID for WPS PBC */ 661 ret = 1; 662 } 663 } else if (eap_is_wps_pin_enrollee(&ssid->eap)) { 664 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 665 if (wps_ie && 666 (wps_is_selected_pin_registrar(wps_ie) || 667 wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) { 668 /* allow wildcard SSID for WPS PIN */ 669 ret = 1; 670 } 671 } 672 673 if (!ret && ssid->bssid_set && 674 os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) { 675 /* allow wildcard SSID due to hardcoded BSSID match */ 676 ret = 1; 677 } 678 679 wpabuf_free(wps_ie); 680 681 return ret; 682 } 683 684 685 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s, 686 struct wpa_scan_res *selected, 687 struct wpa_ssid *ssid) 688 { 689 const u8 *sel_uuid, *uuid; 690 size_t i; 691 struct wpabuf *wps_ie; 692 int ret = 0; 693 694 if (!eap_is_wps_pbc_enrollee(&ssid->eap)) 695 return 0; 696 697 /* Make sure that only one AP is in active PBC mode */ 698 wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE); 699 if (wps_ie) 700 sel_uuid = wps_get_uuid_e(wps_ie); 701 else 702 sel_uuid = NULL; 703 704 for (i = 0; i < wpa_s->scan_res->num; i++) { 705 struct wpa_scan_res *bss = wpa_s->scan_res->res[i]; 706 struct wpabuf *ie; 707 if (bss == selected) 708 continue; 709 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 710 if (!ie) 711 continue; 712 if (!wps_is_selected_pbc_registrar(ie)) { 713 wpabuf_free(ie); 714 continue; 715 } 716 uuid = wps_get_uuid_e(ie); 717 if (sel_uuid == NULL || uuid == NULL || 718 os_memcmp(sel_uuid, uuid, 16) != 0) { 719 ret = 1; /* PBC overlap */ 720 wpabuf_free(ie); 721 break; 722 } 723 724 /* TODO: verify that this is reasonable dual-band situation */ 725 726 wpabuf_free(ie); 727 } 728 729 wpabuf_free(wps_ie); 730 731 return ret; 732 } 733 734 735 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s) 736 { 737 size_t i; 738 739 if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED) 740 return; 741 742 for (i = 0; i < wpa_s->scan_res->num; i++) { 743 struct wpa_scan_res *bss = wpa_s->scan_res->res[i]; 744 struct wpabuf *ie; 745 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 746 if (!ie) 747 continue; 748 if (wps_is_selected_pbc_registrar(ie)) 749 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC); 750 else if (wps_is_selected_pin_registrar(ie)) 751 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN); 752 else 753 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE); 754 wpabuf_free(ie); 755 break; 756 } 757 } 758 759 760 int wpas_wps_searching(struct wpa_supplicant *wpa_s) 761 { 762 struct wpa_ssid *ssid; 763 764 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 765 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled) 766 return 1; 767 } 768 769 return 0; 770 } 771