1 /* 2 * Interworking (IEEE 802.11u) 3 * Copyright (c) 2011-2013, Qualcomm Atheros, Inc. 4 * Copyright (c) 2011-2014, Jouni Malinen <j (at) w1.fi> 5 * 6 * This software may be distributed under the terms of the BSD license. 7 * See README for more details. 8 */ 9 10 #include "includes.h" 11 12 #include "common.h" 13 #include "common/ieee802_11_defs.h" 14 #include "common/gas.h" 15 #include "common/wpa_ctrl.h" 16 #include "utils/pcsc_funcs.h" 17 #include "utils/eloop.h" 18 #include "drivers/driver.h" 19 #include "eap_common/eap_defs.h" 20 #include "eap_peer/eap.h" 21 #include "eap_peer/eap_methods.h" 22 #include "eapol_supp/eapol_supp_sm.h" 23 #include "rsn_supp/wpa.h" 24 #include "wpa_supplicant_i.h" 25 #include "config.h" 26 #include "config_ssid.h" 27 #include "bss.h" 28 #include "scan.h" 29 #include "notify.h" 30 #include "driver_i.h" 31 #include "gas_query.h" 32 #include "hs20_supplicant.h" 33 #include "interworking.h" 34 35 36 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC) 37 #define INTERWORKING_3GPP 38 #else 39 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC) 40 #define INTERWORKING_3GPP 41 #else 42 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC) 43 #define INTERWORKING_3GPP 44 #endif 45 #endif 46 #endif 47 48 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s); 49 static struct wpa_cred * interworking_credentials_available_realm( 50 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 51 int *excluded); 52 static struct wpa_cred * interworking_credentials_available_3gpp( 53 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 54 int *excluded); 55 56 57 static int cred_prio_cmp(const struct wpa_cred *a, const struct wpa_cred *b) 58 { 59 if (a->priority > b->priority) 60 return 1; 61 if (a->priority < b->priority) 62 return -1; 63 if (a->provisioning_sp == NULL || b->provisioning_sp == NULL || 64 os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0) 65 return 0; 66 if (a->sp_priority < b->sp_priority) 67 return 1; 68 if (a->sp_priority > b->sp_priority) 69 return -1; 70 return 0; 71 } 72 73 74 static void interworking_reconnect(struct wpa_supplicant *wpa_s) 75 { 76 unsigned int tried; 77 78 if (wpa_s->wpa_state >= WPA_AUTHENTICATING) { 79 wpa_supplicant_cancel_sched_scan(wpa_s); 80 wpa_s->own_disconnect_req = 1; 81 wpa_supplicant_deauthenticate(wpa_s, 82 WLAN_REASON_DEAUTH_LEAVING); 83 } 84 wpa_s->disconnected = 0; 85 wpa_s->reassociate = 1; 86 tried = wpa_s->interworking_fast_assoc_tried; 87 wpa_s->interworking_fast_assoc_tried = 1; 88 89 if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0) 90 return; 91 92 wpa_s->interworking_fast_assoc_tried = 0; 93 wpa_supplicant_req_scan(wpa_s, 0, 0); 94 } 95 96 97 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids, 98 struct wpabuf *extra) 99 { 100 struct wpabuf *buf; 101 size_t i; 102 u8 *len_pos; 103 104 buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 + 105 (extra ? wpabuf_len(extra) : 0)); 106 if (buf == NULL) 107 return NULL; 108 109 len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST); 110 for (i = 0; i < num_ids; i++) 111 wpabuf_put_le16(buf, info_ids[i]); 112 gas_anqp_set_element_len(buf, len_pos); 113 if (extra) 114 wpabuf_put_buf(buf, extra); 115 116 gas_anqp_set_len(buf); 117 118 return buf; 119 } 120 121 122 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst, 123 u8 dialog_token, 124 enum gas_query_result result, 125 const struct wpabuf *adv_proto, 126 const struct wpabuf *resp, 127 u16 status_code) 128 { 129 struct wpa_supplicant *wpa_s = ctx; 130 131 wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR 132 " dialog_token=%u result=%d status_code=%u", 133 MAC2STR(dst), dialog_token, result, status_code); 134 anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp, 135 status_code); 136 interworking_next_anqp_fetch(wpa_s); 137 } 138 139 140 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s) 141 { 142 struct wpa_cred *cred; 143 144 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 145 if (cred->roaming_consortium_len) 146 return 1; 147 if (cred->required_roaming_consortium_len) 148 return 1; 149 } 150 return 0; 151 } 152 153 154 static int cred_with_3gpp(struct wpa_supplicant *wpa_s) 155 { 156 struct wpa_cred *cred; 157 158 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 159 if (cred->pcsc || cred->imsi) 160 return 1; 161 } 162 return 0; 163 } 164 165 166 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s) 167 { 168 struct wpa_cred *cred; 169 170 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 171 if (cred->pcsc || cred->imsi) 172 continue; 173 if (!cred->eap_method) 174 return 1; 175 if (cred->realm && cred->roaming_consortium_len == 0) 176 return 1; 177 } 178 return 0; 179 } 180 181 182 static int cred_with_domain(struct wpa_supplicant *wpa_s) 183 { 184 struct wpa_cred *cred; 185 186 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 187 if (cred->domain || cred->pcsc || cred->imsi || 188 cred->roaming_partner) 189 return 1; 190 } 191 return 0; 192 } 193 194 195 #ifdef CONFIG_HS20 196 197 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s) 198 { 199 struct wpa_cred *cred; 200 201 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 202 if (cred->min_dl_bandwidth_home || 203 cred->min_ul_bandwidth_home || 204 cred->min_dl_bandwidth_roaming || 205 cred->min_ul_bandwidth_roaming) 206 return 1; 207 } 208 return 0; 209 } 210 211 212 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s) 213 { 214 struct wpa_cred *cred; 215 216 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 217 if (cred->num_req_conn_capab) 218 return 1; 219 } 220 return 0; 221 } 222 223 #endif /* CONFIG_HS20 */ 224 225 226 static int additional_roaming_consortiums(struct wpa_bss *bss) 227 { 228 const u8 *ie; 229 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); 230 if (ie == NULL || ie[1] == 0) 231 return 0; 232 return ie[2]; /* Number of ANQP OIs */ 233 } 234 235 236 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx) 237 { 238 struct wpa_supplicant *wpa_s = eloop_ctx; 239 interworking_next_anqp_fetch(wpa_s); 240 } 241 242 243 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s, 244 struct wpa_bss *bss) 245 { 246 struct wpabuf *buf; 247 int ret = 0; 248 int res; 249 u16 info_ids[8]; 250 size_t num_info_ids = 0; 251 struct wpabuf *extra = NULL; 252 int all = wpa_s->fetch_all_anqp; 253 254 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR, 255 MAC2STR(bss->bssid)); 256 wpa_s->interworking_gas_bss = bss; 257 258 info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST; 259 if (all) { 260 info_ids[num_info_ids++] = ANQP_VENUE_NAME; 261 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE; 262 } 263 if (all || (cred_with_roaming_consortium(wpa_s) && 264 additional_roaming_consortiums(bss))) 265 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM; 266 if (all) 267 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY; 268 if (all || cred_with_nai_realm(wpa_s)) 269 info_ids[num_info_ids++] = ANQP_NAI_REALM; 270 if (all || cred_with_3gpp(wpa_s)) { 271 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK; 272 wpa_supplicant_scard_init(wpa_s, NULL); 273 } 274 if (all || cred_with_domain(wpa_s)) 275 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME; 276 wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info", 277 (u8 *) info_ids, num_info_ids * 2); 278 279 #ifdef CONFIG_HS20 280 if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) { 281 u8 *len_pos; 282 283 extra = wpabuf_alloc(100); 284 if (!extra) 285 return -1; 286 287 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC); 288 wpabuf_put_be24(extra, OUI_WFA); 289 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE); 290 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST); 291 wpabuf_put_u8(extra, 0); /* Reserved */ 292 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST); 293 if (all) 294 wpabuf_put_u8(extra, 295 HS20_STYPE_OPERATOR_FRIENDLY_NAME); 296 if (all || cred_with_min_backhaul(wpa_s)) 297 wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS); 298 if (all || cred_with_conn_capab(wpa_s)) 299 wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY); 300 if (all) 301 wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS); 302 if (all) 303 wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST); 304 gas_anqp_set_element_len(extra, len_pos); 305 } 306 #endif /* CONFIG_HS20 */ 307 308 buf = anqp_build_req(info_ids, num_info_ids, extra); 309 wpabuf_free(extra); 310 if (buf == NULL) 311 return -1; 312 313 res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf, 314 interworking_anqp_resp_cb, wpa_s); 315 if (res < 0) { 316 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request"); 317 wpabuf_free(buf); 318 ret = -1; 319 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, 320 NULL); 321 } else 322 wpa_msg(wpa_s, MSG_DEBUG, 323 "ANQP: Query started with dialog token %u", res); 324 325 return ret; 326 } 327 328 329 struct nai_realm_eap { 330 u8 method; 331 u8 inner_method; 332 enum nai_realm_eap_auth_inner_non_eap inner_non_eap; 333 u8 cred_type; 334 u8 tunneled_cred_type; 335 }; 336 337 struct nai_realm { 338 u8 encoding; 339 char *realm; 340 u8 eap_count; 341 struct nai_realm_eap *eap; 342 }; 343 344 345 static void nai_realm_free(struct nai_realm *realms, u16 count) 346 { 347 u16 i; 348 349 if (realms == NULL) 350 return; 351 for (i = 0; i < count; i++) { 352 os_free(realms[i].eap); 353 os_free(realms[i].realm); 354 } 355 os_free(realms); 356 } 357 358 359 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos, 360 const u8 *end) 361 { 362 u8 elen, auth_count, a; 363 const u8 *e_end; 364 365 if (end - pos < 3) { 366 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields"); 367 return NULL; 368 } 369 370 elen = *pos++; 371 if (elen > end - pos || elen < 2) { 372 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield"); 373 return NULL; 374 } 375 e_end = pos + elen; 376 e->method = *pos++; 377 auth_count = *pos++; 378 wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u", 379 elen, e->method, auth_count); 380 381 for (a = 0; a < auth_count; a++) { 382 u8 id, len; 383 384 if (end - pos < 2) { 385 wpa_printf(MSG_DEBUG, 386 "No room for Authentication Parameter subfield header"); 387 return NULL; 388 } 389 390 id = *pos++; 391 len = *pos++; 392 if (len > end - pos) { 393 wpa_printf(MSG_DEBUG, 394 "No room for Authentication Parameter subfield"); 395 return NULL; 396 } 397 398 switch (id) { 399 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH: 400 if (len < 1) 401 break; 402 e->inner_non_eap = *pos; 403 if (e->method != EAP_TYPE_TTLS) 404 break; 405 switch (*pos) { 406 case NAI_REALM_INNER_NON_EAP_PAP: 407 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP"); 408 break; 409 case NAI_REALM_INNER_NON_EAP_CHAP: 410 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP"); 411 break; 412 case NAI_REALM_INNER_NON_EAP_MSCHAP: 413 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP"); 414 break; 415 case NAI_REALM_INNER_NON_EAP_MSCHAPV2: 416 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2"); 417 break; 418 } 419 break; 420 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD: 421 if (len < 1) 422 break; 423 e->inner_method = *pos; 424 wpa_printf(MSG_DEBUG, "Inner EAP method: %u", 425 e->inner_method); 426 break; 427 case NAI_REALM_EAP_AUTH_CRED_TYPE: 428 if (len < 1) 429 break; 430 e->cred_type = *pos; 431 wpa_printf(MSG_DEBUG, "Credential Type: %u", 432 e->cred_type); 433 break; 434 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE: 435 if (len < 1) 436 break; 437 e->tunneled_cred_type = *pos; 438 wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential " 439 "Type: %u", e->tunneled_cred_type); 440 break; 441 default: 442 wpa_printf(MSG_DEBUG, "Unsupported Authentication " 443 "Parameter: id=%u len=%u", id, len); 444 wpa_hexdump(MSG_DEBUG, "Authentication Parameter " 445 "Value", pos, len); 446 break; 447 } 448 449 pos += len; 450 } 451 452 return e_end; 453 } 454 455 456 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos, 457 const u8 *end) 458 { 459 u16 len; 460 const u8 *f_end; 461 u8 realm_len, e; 462 463 if (end - pos < 4) { 464 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data " 465 "fixed fields"); 466 return NULL; 467 } 468 469 len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */ 470 pos += 2; 471 if (len > end - pos || len < 3) { 472 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data " 473 "(len=%u; left=%u)", 474 len, (unsigned int) (end - pos)); 475 return NULL; 476 } 477 f_end = pos + len; 478 479 r->encoding = *pos++; 480 realm_len = *pos++; 481 if (realm_len > f_end - pos) { 482 wpa_printf(MSG_DEBUG, "No room for NAI Realm " 483 "(len=%u; left=%u)", 484 realm_len, (unsigned int) (f_end - pos)); 485 return NULL; 486 } 487 wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len); 488 r->realm = dup_binstr(pos, realm_len); 489 if (r->realm == NULL) 490 return NULL; 491 pos += realm_len; 492 493 if (f_end - pos < 1) { 494 wpa_printf(MSG_DEBUG, "No room for EAP Method Count"); 495 return NULL; 496 } 497 r->eap_count = *pos++; 498 wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count); 499 if (r->eap_count * 3 > f_end - pos) { 500 wpa_printf(MSG_DEBUG, "No room for EAP Methods"); 501 return NULL; 502 } 503 r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap)); 504 if (r->eap == NULL) 505 return NULL; 506 507 for (e = 0; e < r->eap_count; e++) { 508 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end); 509 if (pos == NULL) 510 return NULL; 511 } 512 513 return f_end; 514 } 515 516 517 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count) 518 { 519 struct nai_realm *realm; 520 const u8 *pos, *end; 521 u16 i, num; 522 size_t left; 523 524 if (anqp == NULL) 525 return NULL; 526 left = wpabuf_len(anqp); 527 if (left < 2) 528 return NULL; 529 530 pos = wpabuf_head_u8(anqp); 531 end = pos + left; 532 num = WPA_GET_LE16(pos); 533 wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num); 534 pos += 2; 535 left -= 2; 536 537 if (num > left / 5) { 538 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not " 539 "enough data (%u octets) for that many realms", 540 num, (unsigned int) left); 541 return NULL; 542 } 543 544 realm = os_calloc(num, sizeof(struct nai_realm)); 545 if (realm == NULL) 546 return NULL; 547 548 for (i = 0; i < num; i++) { 549 pos = nai_realm_parse_realm(&realm[i], pos, end); 550 if (pos == NULL) { 551 nai_realm_free(realm, num); 552 return NULL; 553 } 554 } 555 556 *count = num; 557 return realm; 558 } 559 560 561 static int nai_realm_match(struct nai_realm *realm, const char *home_realm) 562 { 563 char *tmp, *pos, *end; 564 int match = 0; 565 566 if (realm->realm == NULL || home_realm == NULL) 567 return 0; 568 569 if (os_strchr(realm->realm, ';') == NULL) 570 return os_strcasecmp(realm->realm, home_realm) == 0; 571 572 tmp = os_strdup(realm->realm); 573 if (tmp == NULL) 574 return 0; 575 576 pos = tmp; 577 while (*pos) { 578 end = os_strchr(pos, ';'); 579 if (end) 580 *end = '\0'; 581 if (os_strcasecmp(pos, home_realm) == 0) { 582 match = 1; 583 break; 584 } 585 if (end == NULL) 586 break; 587 pos = end + 1; 588 } 589 590 os_free(tmp); 591 592 return match; 593 } 594 595 596 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s, 597 struct nai_realm_eap *eap) 598 { 599 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) { 600 wpa_msg(wpa_s, MSG_DEBUG, 601 "nai-realm-cred-username: EAP method not supported: %d", 602 eap->method); 603 return 0; /* method not supported */ 604 } 605 606 if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP && 607 eap->method != EAP_TYPE_FAST) { 608 /* Only tunneled methods with username/password supported */ 609 wpa_msg(wpa_s, MSG_DEBUG, 610 "nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST", 611 eap->method); 612 return 0; 613 } 614 615 if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) { 616 if (eap->inner_method && 617 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) { 618 wpa_msg(wpa_s, MSG_DEBUG, 619 "nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d", 620 eap->inner_method); 621 return 0; 622 } 623 if (!eap->inner_method && 624 eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) { 625 wpa_msg(wpa_s, MSG_DEBUG, 626 "nai-realm-cred-username: MSCHAPv2 not supported"); 627 return 0; 628 } 629 } 630 631 if (eap->method == EAP_TYPE_TTLS) { 632 if (eap->inner_method == 0 && eap->inner_non_eap == 0) 633 return 1; /* Assume TTLS/MSCHAPv2 is used */ 634 if (eap->inner_method && 635 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) { 636 wpa_msg(wpa_s, MSG_DEBUG, 637 "nai-realm-cred-username: TTLS, but inner not supported: %d", 638 eap->inner_method); 639 return 0; 640 } 641 if (eap->inner_non_eap && 642 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP && 643 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP && 644 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP && 645 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) { 646 wpa_msg(wpa_s, MSG_DEBUG, 647 "nai-realm-cred-username: TTLS, inner-non-eap not supported: %d", 648 eap->inner_non_eap); 649 return 0; 650 } 651 } 652 653 if (eap->inner_method && 654 eap->inner_method != EAP_TYPE_GTC && 655 eap->inner_method != EAP_TYPE_MSCHAPV2) { 656 wpa_msg(wpa_s, MSG_DEBUG, 657 "nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d", 658 eap->inner_method); 659 return 0; 660 } 661 662 return 1; 663 } 664 665 666 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s, 667 struct nai_realm_eap *eap) 668 { 669 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) { 670 wpa_msg(wpa_s, MSG_DEBUG, 671 "nai-realm-cred-cert: Method not supported: %d", 672 eap->method); 673 return 0; /* method not supported */ 674 } 675 676 if (eap->method != EAP_TYPE_TLS) { 677 /* Only EAP-TLS supported for credential authentication */ 678 wpa_msg(wpa_s, MSG_DEBUG, 679 "nai-realm-cred-cert: Method not TLS: %d", 680 eap->method); 681 return 0; 682 } 683 684 return 1; 685 } 686 687 688 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s, 689 struct wpa_cred *cred, 690 struct nai_realm *realm) 691 { 692 u8 e; 693 694 if (cred->username == NULL || 695 cred->username[0] == '\0' || 696 ((cred->password == NULL || 697 cred->password[0] == '\0') && 698 (cred->private_key == NULL || 699 cred->private_key[0] == '\0'))) { 700 wpa_msg(wpa_s, MSG_DEBUG, 701 "nai-realm-find-eap: incomplete cred info: username: %s password: %s private_key: %s", 702 cred->username ? cred->username : "NULL", 703 cred->password ? cred->password : "NULL", 704 cred->private_key ? cred->private_key : "NULL"); 705 return NULL; 706 } 707 708 for (e = 0; e < realm->eap_count; e++) { 709 struct nai_realm_eap *eap = &realm->eap[e]; 710 if (cred->password && cred->password[0] && 711 nai_realm_cred_username(wpa_s, eap)) 712 return eap; 713 if (cred->private_key && cred->private_key[0] && 714 nai_realm_cred_cert(wpa_s, eap)) 715 return eap; 716 } 717 718 return NULL; 719 } 720 721 722 #ifdef INTERWORKING_3GPP 723 724 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len) 725 { 726 u8 plmn[3], plmn2[3]; 727 const u8 *pos, *end; 728 u8 udhl; 729 730 /* 731 * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network 732 * operator is allowed to include only two digits of the MNC, so allow 733 * matches based on both two and three digit MNC assumptions. Since some 734 * SIM/USIM cards may not expose MNC length conveniently, we may be 735 * provided the default MNC length 3 here and as such, checking with MNC 736 * length 2 is justifiable even though 3GPP TS 24.234 does not mention 737 * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used 738 * with otherwise matching values would not be good idea in general, so 739 * this should not result in selecting incorrect networks. 740 */ 741 /* Match with 3 digit MNC */ 742 plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4); 743 plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4); 744 plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4); 745 /* Match with 2 digit MNC */ 746 plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4); 747 plmn2[1] = (imsi[2] - '0') | 0xf0; 748 plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4); 749 750 if (anqp == NULL) 751 return 0; 752 pos = wpabuf_head_u8(anqp); 753 end = pos + wpabuf_len(anqp); 754 if (end - pos < 2) 755 return 0; 756 if (*pos != 0) { 757 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos); 758 return 0; 759 } 760 pos++; 761 udhl = *pos++; 762 if (udhl > end - pos) { 763 wpa_printf(MSG_DEBUG, "Invalid UDHL"); 764 return 0; 765 } 766 end = pos + udhl; 767 768 wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)", 769 plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2], 770 imsi, mnc_len); 771 772 while (end - pos >= 2) { 773 u8 iei, len; 774 const u8 *l_end; 775 iei = *pos++; 776 len = *pos++ & 0x7f; 777 if (len > end - pos) 778 break; 779 l_end = pos + len; 780 781 if (iei == 0 && len > 0) { 782 /* PLMN List */ 783 u8 num, i; 784 wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element", 785 pos, len); 786 num = *pos++; 787 for (i = 0; i < num; i++) { 788 if (l_end - pos < 3) 789 break; 790 if (os_memcmp(pos, plmn, 3) == 0 || 791 os_memcmp(pos, plmn2, 3) == 0) 792 return 1; /* Found matching PLMN */ 793 pos += 3; 794 } 795 } else { 796 wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element", 797 pos, len); 798 } 799 800 pos = l_end; 801 } 802 803 return 0; 804 } 805 806 807 static int build_root_nai(char *nai, size_t nai_len, const char *imsi, 808 size_t mnc_len, char prefix) 809 { 810 const char *sep, *msin; 811 char *end, *pos; 812 size_t msin_len, plmn_len; 813 814 /* 815 * TS 23.003, Clause 14 (3GPP to WLAN Interworking) 816 * Root NAI: 817 * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org 818 * <MNC> is zero-padded to three digits in case two-digit MNC is used 819 */ 820 821 if (imsi == NULL || os_strlen(imsi) > 16) { 822 wpa_printf(MSG_DEBUG, "No valid IMSI available"); 823 return -1; 824 } 825 sep = os_strchr(imsi, '-'); 826 if (sep) { 827 plmn_len = sep - imsi; 828 msin = sep + 1; 829 } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) { 830 plmn_len = 3 + mnc_len; 831 msin = imsi + plmn_len; 832 } else 833 return -1; 834 if (plmn_len != 5 && plmn_len != 6) 835 return -1; 836 msin_len = os_strlen(msin); 837 838 pos = nai; 839 end = nai + nai_len; 840 if (prefix) 841 *pos++ = prefix; 842 os_memcpy(pos, imsi, plmn_len); 843 pos += plmn_len; 844 os_memcpy(pos, msin, msin_len); 845 pos += msin_len; 846 pos += os_snprintf(pos, end - pos, "@wlan.mnc"); 847 if (plmn_len == 5) { 848 *pos++ = '0'; 849 *pos++ = imsi[3]; 850 *pos++ = imsi[4]; 851 } else { 852 *pos++ = imsi[3]; 853 *pos++ = imsi[4]; 854 *pos++ = imsi[5]; 855 } 856 os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org", 857 imsi[0], imsi[1], imsi[2]); 858 859 return 0; 860 } 861 862 863 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix) 864 { 865 char nai[100]; 866 if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0) 867 return -1; 868 return wpa_config_set_quoted(ssid, "identity", nai); 869 } 870 871 #endif /* INTERWORKING_3GPP */ 872 873 874 static int already_connected(struct wpa_supplicant *wpa_s, 875 struct wpa_cred *cred, struct wpa_bss *bss) 876 { 877 struct wpa_ssid *ssid, *sel_ssid; 878 struct wpa_bss *selected; 879 880 if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL) 881 return 0; 882 883 ssid = wpa_s->current_ssid; 884 if (ssid->parent_cred != cred) 885 return 0; 886 887 if (ssid->ssid_len != bss->ssid_len || 888 os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0) 889 return 0; 890 891 sel_ssid = NULL; 892 selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid); 893 if (selected && sel_ssid && sel_ssid->priority > ssid->priority) 894 return 0; /* higher priority network in scan results */ 895 896 return 1; 897 } 898 899 900 static void remove_duplicate_network(struct wpa_supplicant *wpa_s, 901 struct wpa_cred *cred, 902 struct wpa_bss *bss) 903 { 904 struct wpa_ssid *ssid; 905 906 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 907 if (ssid->parent_cred != cred) 908 continue; 909 if (ssid->ssid_len != bss->ssid_len || 910 os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0) 911 continue; 912 913 break; 914 } 915 916 if (ssid == NULL) 917 return; 918 919 wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential"); 920 921 if (ssid == wpa_s->current_ssid) { 922 wpa_sm_set_config(wpa_s->wpa, NULL); 923 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); 924 wpa_s->own_disconnect_req = 1; 925 wpa_supplicant_deauthenticate(wpa_s, 926 WLAN_REASON_DEAUTH_LEAVING); 927 } 928 929 wpas_notify_network_removed(wpa_s, ssid); 930 wpa_config_remove_network(wpa_s->conf, ssid->id); 931 } 932 933 934 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s, 935 struct wpa_ssid *ssid) 936 { 937 const char *key_mgmt = NULL; 938 #ifdef CONFIG_IEEE80211R 939 int res; 940 struct wpa_driver_capa capa; 941 942 res = wpa_drv_get_capa(wpa_s, &capa); 943 if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) { 944 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ? 945 "WPA-EAP WPA-EAP-SHA256 FT-EAP" : 946 "WPA-EAP FT-EAP"; 947 } 948 #endif /* CONFIG_IEEE80211R */ 949 950 if (!key_mgmt) 951 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ? 952 "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP"; 953 if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0 || 954 wpa_config_set(ssid, "proto", "RSN", 0) < 0 || 955 wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0) 956 return -1; 957 return 0; 958 } 959 960 961 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s, 962 struct wpa_cred *cred, 963 struct wpa_bss *bss, int only_add) 964 { 965 #ifdef INTERWORKING_3GPP 966 struct wpa_ssid *ssid; 967 int eap_type; 968 int res; 969 char prefix; 970 971 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) 972 return -1; 973 974 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR 975 " (3GPP)", MAC2STR(bss->bssid)); 976 977 if (already_connected(wpa_s, cred, bss)) { 978 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, 979 MAC2STR(bss->bssid)); 980 return wpa_s->current_ssid->id; 981 } 982 983 remove_duplicate_network(wpa_s, cred, bss); 984 985 ssid = wpa_config_add_network(wpa_s->conf); 986 if (ssid == NULL) 987 return -1; 988 ssid->parent_cred = cred; 989 990 wpas_notify_network_added(wpa_s, ssid); 991 wpa_config_set_network_defaults(ssid); 992 ssid->priority = cred->priority; 993 ssid->temporary = 1; 994 ssid->ssid = os_zalloc(bss->ssid_len + 1); 995 if (ssid->ssid == NULL) 996 goto fail; 997 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); 998 ssid->ssid_len = bss->ssid_len; 999 ssid->eap.sim_num = cred->sim_num; 1000 1001 if (interworking_set_hs20_params(wpa_s, ssid) < 0) 1002 goto fail; 1003 1004 eap_type = EAP_TYPE_SIM; 1005 if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard)) 1006 eap_type = EAP_TYPE_AKA; 1007 if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) { 1008 if (cred->eap_method[0].method == EAP_TYPE_SIM || 1009 cred->eap_method[0].method == EAP_TYPE_AKA || 1010 cred->eap_method[0].method == EAP_TYPE_AKA_PRIME) 1011 eap_type = cred->eap_method[0].method; 1012 } 1013 1014 switch (eap_type) { 1015 case EAP_TYPE_SIM: 1016 prefix = '1'; 1017 res = wpa_config_set(ssid, "eap", "SIM", 0); 1018 break; 1019 case EAP_TYPE_AKA: 1020 prefix = '0'; 1021 res = wpa_config_set(ssid, "eap", "AKA", 0); 1022 break; 1023 case EAP_TYPE_AKA_PRIME: 1024 prefix = '6'; 1025 res = wpa_config_set(ssid, "eap", "AKA'", 0); 1026 break; 1027 default: 1028 res = -1; 1029 break; 1030 } 1031 if (res < 0) { 1032 wpa_msg(wpa_s, MSG_DEBUG, 1033 "Selected EAP method (%d) not supported", eap_type); 1034 goto fail; 1035 } 1036 1037 if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) { 1038 wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI"); 1039 goto fail; 1040 } 1041 1042 if (cred->milenage && cred->milenage[0]) { 1043 if (wpa_config_set_quoted(ssid, "password", 1044 cred->milenage) < 0) 1045 goto fail; 1046 } else if (cred->pcsc) { 1047 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0) 1048 goto fail; 1049 if (wpa_s->conf->pcsc_pin && 1050 wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin) 1051 < 0) 1052 goto fail; 1053 } 1054 1055 wpa_s->next_ssid = ssid; 1056 wpa_config_update_prio_list(wpa_s->conf); 1057 if (!only_add) 1058 interworking_reconnect(wpa_s); 1059 1060 return ssid->id; 1061 1062 fail: 1063 wpas_notify_network_removed(wpa_s, ssid); 1064 wpa_config_remove_network(wpa_s->conf, ssid->id); 1065 #endif /* INTERWORKING_3GPP */ 1066 return -1; 1067 } 1068 1069 1070 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id, 1071 size_t rc_len) 1072 { 1073 const u8 *pos, *end; 1074 u8 lens; 1075 1076 if (ie == NULL) 1077 return 0; 1078 1079 pos = ie + 2; 1080 end = ie + 2 + ie[1]; 1081 1082 /* Roaming Consortium element: 1083 * Number of ANQP OIs 1084 * OI #1 and #2 lengths 1085 * OI #1, [OI #2], [OI #3] 1086 */ 1087 1088 if (end - pos < 2) 1089 return 0; 1090 1091 pos++; /* skip Number of ANQP OIs */ 1092 lens = *pos++; 1093 if ((lens & 0x0f) + (lens >> 4) > end - pos) 1094 return 0; 1095 1096 if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) 1097 return 1; 1098 pos += lens & 0x0f; 1099 1100 if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) 1101 return 1; 1102 pos += lens >> 4; 1103 1104 if (pos < end && (size_t) (end - pos) == rc_len && 1105 os_memcmp(pos, rc_id, rc_len) == 0) 1106 return 1; 1107 1108 return 0; 1109 } 1110 1111 1112 static int roaming_consortium_anqp_match(const struct wpabuf *anqp, 1113 const u8 *rc_id, size_t rc_len) 1114 { 1115 const u8 *pos, *end; 1116 u8 len; 1117 1118 if (anqp == NULL) 1119 return 0; 1120 1121 pos = wpabuf_head(anqp); 1122 end = pos + wpabuf_len(anqp); 1123 1124 /* Set of <OI Length, OI> duples */ 1125 while (pos < end) { 1126 len = *pos++; 1127 if (len > end - pos) 1128 break; 1129 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) 1130 return 1; 1131 pos += len; 1132 } 1133 1134 return 0; 1135 } 1136 1137 1138 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp, 1139 const u8 *rc_id, size_t rc_len) 1140 { 1141 return roaming_consortium_element_match(ie, rc_id, rc_len) || 1142 roaming_consortium_anqp_match(anqp, rc_id, rc_len); 1143 } 1144 1145 1146 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss) 1147 { 1148 const u8 *ie; 1149 1150 if (cred->required_roaming_consortium_len == 0) 1151 return 0; 1152 1153 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); 1154 1155 if (ie == NULL && 1156 (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL)) 1157 return 1; 1158 1159 return !roaming_consortium_match(ie, 1160 bss->anqp ? 1161 bss->anqp->roaming_consortium : NULL, 1162 cred->required_roaming_consortium, 1163 cred->required_roaming_consortium_len); 1164 } 1165 1166 1167 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss) 1168 { 1169 size_t i; 1170 1171 if (!cred->excluded_ssid) 1172 return 0; 1173 1174 for (i = 0; i < cred->num_excluded_ssid; i++) { 1175 struct excluded_ssid *e = &cred->excluded_ssid[i]; 1176 if (bss->ssid_len == e->ssid_len && 1177 os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0) 1178 return 1; 1179 } 1180 1181 return 0; 1182 } 1183 1184 1185 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s, 1186 struct wpa_cred *cred, struct wpa_bss *bss) 1187 { 1188 #ifdef CONFIG_HS20 1189 int res; 1190 unsigned int dl_bandwidth, ul_bandwidth; 1191 const u8 *wan; 1192 u8 wan_info, dl_load, ul_load; 1193 u16 lmd; 1194 u32 ul_speed, dl_speed; 1195 1196 if (!cred->min_dl_bandwidth_home && 1197 !cred->min_ul_bandwidth_home && 1198 !cred->min_dl_bandwidth_roaming && 1199 !cred->min_ul_bandwidth_roaming) 1200 return 0; /* No bandwidth constraint specified */ 1201 1202 if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL) 1203 return 0; /* No WAN Metrics known - ignore constraint */ 1204 1205 wan = wpabuf_head(bss->anqp->hs20_wan_metrics); 1206 wan_info = wan[0]; 1207 if (wan_info & BIT(3)) 1208 return 1; /* WAN link at capacity */ 1209 lmd = WPA_GET_LE16(wan + 11); 1210 if (lmd == 0) 1211 return 0; /* Downlink/Uplink Load was not measured */ 1212 dl_speed = WPA_GET_LE32(wan + 1); 1213 ul_speed = WPA_GET_LE32(wan + 5); 1214 dl_load = wan[9]; 1215 ul_load = wan[10]; 1216 1217 if (dl_speed >= 0xffffff) 1218 dl_bandwidth = dl_speed / 255 * (255 - dl_load); 1219 else 1220 dl_bandwidth = dl_speed * (255 - dl_load) / 255; 1221 1222 if (ul_speed >= 0xffffff) 1223 ul_bandwidth = ul_speed / 255 * (255 - ul_load); 1224 else 1225 ul_bandwidth = ul_speed * (255 - ul_load) / 255; 1226 1227 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? 1228 bss->anqp->domain_name : NULL); 1229 if (res > 0) { 1230 if (cred->min_dl_bandwidth_home > dl_bandwidth) 1231 return 1; 1232 if (cred->min_ul_bandwidth_home > ul_bandwidth) 1233 return 1; 1234 } else { 1235 if (cred->min_dl_bandwidth_roaming > dl_bandwidth) 1236 return 1; 1237 if (cred->min_ul_bandwidth_roaming > ul_bandwidth) 1238 return 1; 1239 } 1240 #endif /* CONFIG_HS20 */ 1241 1242 return 0; 1243 } 1244 1245 1246 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s, 1247 struct wpa_cred *cred, struct wpa_bss *bss) 1248 { 1249 const u8 *ie; 1250 int res; 1251 1252 if (!cred->max_bss_load) 1253 return 0; /* No BSS Load constraint specified */ 1254 1255 ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD); 1256 if (ie == NULL || ie[1] < 3) 1257 return 0; /* No BSS Load advertised */ 1258 1259 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? 1260 bss->anqp->domain_name : NULL); 1261 if (res <= 0) 1262 return 0; /* Not a home network */ 1263 1264 return ie[4] > cred->max_bss_load; 1265 } 1266 1267 1268 #ifdef CONFIG_HS20 1269 1270 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto) 1271 { 1272 while (end - pos >= 4) { 1273 if (pos[0] == proto && pos[3] == 1 /* Open */) 1274 return 1; 1275 pos += 4; 1276 } 1277 1278 return 0; 1279 } 1280 1281 1282 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto, 1283 u16 port) 1284 { 1285 while (end - pos >= 4) { 1286 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port && 1287 pos[3] == 1 /* Open */) 1288 return 1; 1289 pos += 4; 1290 } 1291 1292 return 0; 1293 } 1294 1295 #endif /* CONFIG_HS20 */ 1296 1297 1298 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s, 1299 struct wpa_cred *cred, struct wpa_bss *bss) 1300 { 1301 #ifdef CONFIG_HS20 1302 int res; 1303 const u8 *capab, *end; 1304 unsigned int i, j; 1305 int *ports; 1306 1307 if (!cred->num_req_conn_capab) 1308 return 0; /* No connection capability constraint specified */ 1309 1310 if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL) 1311 return 0; /* No Connection Capability known - ignore constraint 1312 */ 1313 1314 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? 1315 bss->anqp->domain_name : NULL); 1316 if (res > 0) 1317 return 0; /* No constraint in home network */ 1318 1319 capab = wpabuf_head(bss->anqp->hs20_connection_capability); 1320 end = capab + wpabuf_len(bss->anqp->hs20_connection_capability); 1321 1322 for (i = 0; i < cred->num_req_conn_capab; i++) { 1323 ports = cred->req_conn_capab_port[i]; 1324 if (!ports) { 1325 if (!has_proto_match(capab, end, 1326 cred->req_conn_capab_proto[i])) 1327 return 1; 1328 } else { 1329 for (j = 0; ports[j] > -1; j++) { 1330 if (!has_proto_port_match( 1331 capab, end, 1332 cred->req_conn_capab_proto[i], 1333 ports[j])) 1334 return 1; 1335 } 1336 } 1337 } 1338 #endif /* CONFIG_HS20 */ 1339 1340 return 0; 1341 } 1342 1343 1344 static struct wpa_cred * interworking_credentials_available_roaming_consortium( 1345 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 1346 int *excluded) 1347 { 1348 struct wpa_cred *cred, *selected = NULL; 1349 const u8 *ie; 1350 int is_excluded = 0; 1351 1352 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); 1353 1354 if (ie == NULL && 1355 (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL)) 1356 return NULL; 1357 1358 if (wpa_s->conf->cred == NULL) 1359 return NULL; 1360 1361 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 1362 if (cred->roaming_consortium_len == 0) 1363 continue; 1364 1365 if (!roaming_consortium_match(ie, 1366 bss->anqp ? 1367 bss->anqp->roaming_consortium : 1368 NULL, 1369 cred->roaming_consortium, 1370 cred->roaming_consortium_len)) 1371 continue; 1372 1373 if (cred_no_required_oi_match(cred, bss)) 1374 continue; 1375 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss)) 1376 continue; 1377 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss)) 1378 continue; 1379 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss)) 1380 continue; 1381 if (cred_excluded_ssid(cred, bss)) { 1382 if (excluded == NULL) 1383 continue; 1384 if (selected == NULL) { 1385 selected = cred; 1386 is_excluded = 1; 1387 } 1388 } else { 1389 if (selected == NULL || is_excluded || 1390 cred_prio_cmp(selected, cred) < 0) { 1391 selected = cred; 1392 is_excluded = 0; 1393 } 1394 } 1395 } 1396 1397 if (excluded) 1398 *excluded = is_excluded; 1399 1400 return selected; 1401 } 1402 1403 1404 static int interworking_set_eap_params(struct wpa_ssid *ssid, 1405 struct wpa_cred *cred, int ttls) 1406 { 1407 if (cred->eap_method) { 1408 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF && 1409 cred->eap_method->method == EAP_TYPE_TTLS; 1410 1411 os_free(ssid->eap.eap_methods); 1412 ssid->eap.eap_methods = 1413 os_malloc(sizeof(struct eap_method_type) * 2); 1414 if (ssid->eap.eap_methods == NULL) 1415 return -1; 1416 os_memcpy(ssid->eap.eap_methods, cred->eap_method, 1417 sizeof(*cred->eap_method)); 1418 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF; 1419 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE; 1420 } 1421 1422 if (ttls && cred->username && cred->username[0]) { 1423 const char *pos; 1424 char *anon; 1425 /* Use anonymous NAI in Phase 1 */ 1426 pos = os_strchr(cred->username, '@'); 1427 if (pos) { 1428 size_t buflen = 9 + os_strlen(pos) + 1; 1429 anon = os_malloc(buflen); 1430 if (anon == NULL) 1431 return -1; 1432 os_snprintf(anon, buflen, "anonymous%s", pos); 1433 } else if (cred->realm) { 1434 size_t buflen = 10 + os_strlen(cred->realm) + 1; 1435 anon = os_malloc(buflen); 1436 if (anon == NULL) 1437 return -1; 1438 os_snprintf(anon, buflen, "anonymous@%s", cred->realm); 1439 } else { 1440 anon = os_strdup("anonymous"); 1441 if (anon == NULL) 1442 return -1; 1443 } 1444 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) < 1445 0) { 1446 os_free(anon); 1447 return -1; 1448 } 1449 os_free(anon); 1450 } 1451 1452 if (!ttls && cred->username && cred->username[0] && cred->realm && 1453 !os_strchr(cred->username, '@')) { 1454 char *id; 1455 size_t buflen; 1456 int res; 1457 1458 buflen = os_strlen(cred->username) + 1 + 1459 os_strlen(cred->realm) + 1; 1460 1461 id = os_malloc(buflen); 1462 if (!id) 1463 return -1; 1464 os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm); 1465 res = wpa_config_set_quoted(ssid, "identity", id); 1466 os_free(id); 1467 if (res < 0) 1468 return -1; 1469 } else if (cred->username && cred->username[0] && 1470 wpa_config_set_quoted(ssid, "identity", cred->username) < 0) 1471 return -1; 1472 1473 if (cred->password && cred->password[0]) { 1474 if (cred->ext_password && 1475 wpa_config_set(ssid, "password", cred->password, 0) < 0) 1476 return -1; 1477 if (!cred->ext_password && 1478 wpa_config_set_quoted(ssid, "password", cred->password) < 1479 0) 1480 return -1; 1481 } 1482 1483 if (cred->client_cert && cred->client_cert[0] && 1484 wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0) 1485 return -1; 1486 1487 #ifdef ANDROID 1488 if (cred->private_key && 1489 os_strncmp(cred->private_key, "keystore://", 11) == 0) { 1490 /* Use OpenSSL engine configuration for Android keystore */ 1491 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 || 1492 wpa_config_set_quoted(ssid, "key_id", 1493 cred->private_key + 11) < 0 || 1494 wpa_config_set(ssid, "engine", "1", 0) < 0) 1495 return -1; 1496 } else 1497 #endif /* ANDROID */ 1498 if (cred->private_key && cred->private_key[0] && 1499 wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0) 1500 return -1; 1501 1502 if (cred->private_key_passwd && cred->private_key_passwd[0] && 1503 wpa_config_set_quoted(ssid, "private_key_passwd", 1504 cred->private_key_passwd) < 0) 1505 return -1; 1506 1507 if (cred->phase1) { 1508 os_free(ssid->eap.phase1); 1509 ssid->eap.phase1 = os_strdup(cred->phase1); 1510 } 1511 if (cred->phase2) { 1512 os_free(ssid->eap.phase2); 1513 ssid->eap.phase2 = os_strdup(cred->phase2); 1514 } 1515 1516 if (cred->ca_cert && cred->ca_cert[0] && 1517 wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0) 1518 return -1; 1519 1520 if (cred->domain_suffix_match && cred->domain_suffix_match[0] && 1521 wpa_config_set_quoted(ssid, "domain_suffix_match", 1522 cred->domain_suffix_match) < 0) 1523 return -1; 1524 1525 ssid->eap.ocsp = cred->ocsp; 1526 1527 return 0; 1528 } 1529 1530 1531 static int interworking_connect_roaming_consortium( 1532 struct wpa_supplicant *wpa_s, struct wpa_cred *cred, 1533 struct wpa_bss *bss, int only_add) 1534 { 1535 struct wpa_ssid *ssid; 1536 1537 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR 1538 " based on roaming consortium match", MAC2STR(bss->bssid)); 1539 1540 if (already_connected(wpa_s, cred, bss)) { 1541 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, 1542 MAC2STR(bss->bssid)); 1543 return wpa_s->current_ssid->id; 1544 } 1545 1546 remove_duplicate_network(wpa_s, cred, bss); 1547 1548 ssid = wpa_config_add_network(wpa_s->conf); 1549 if (ssid == NULL) 1550 return -1; 1551 ssid->parent_cred = cred; 1552 wpas_notify_network_added(wpa_s, ssid); 1553 wpa_config_set_network_defaults(ssid); 1554 ssid->priority = cred->priority; 1555 ssid->temporary = 1; 1556 ssid->ssid = os_zalloc(bss->ssid_len + 1); 1557 if (ssid->ssid == NULL) 1558 goto fail; 1559 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); 1560 ssid->ssid_len = bss->ssid_len; 1561 1562 if (interworking_set_hs20_params(wpa_s, ssid) < 0) 1563 goto fail; 1564 1565 if (cred->eap_method == NULL) { 1566 wpa_msg(wpa_s, MSG_DEBUG, 1567 "Interworking: No EAP method set for credential using roaming consortium"); 1568 goto fail; 1569 } 1570 1571 if (interworking_set_eap_params( 1572 ssid, cred, 1573 cred->eap_method->vendor == EAP_VENDOR_IETF && 1574 cred->eap_method->method == EAP_TYPE_TTLS) < 0) 1575 goto fail; 1576 1577 wpa_s->next_ssid = ssid; 1578 wpa_config_update_prio_list(wpa_s->conf); 1579 if (!only_add) 1580 interworking_reconnect(wpa_s); 1581 1582 return ssid->id; 1583 1584 fail: 1585 wpas_notify_network_removed(wpa_s, ssid); 1586 wpa_config_remove_network(wpa_s->conf, ssid->id); 1587 return -1; 1588 } 1589 1590 1591 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss, 1592 int only_add) 1593 { 1594 struct wpa_cred *cred, *cred_rc, *cred_3gpp; 1595 struct wpa_ssid *ssid; 1596 struct nai_realm *realm; 1597 struct nai_realm_eap *eap = NULL; 1598 u16 count, i; 1599 char buf[100]; 1600 int excluded = 0, *excl = &excluded; 1601 const char *name; 1602 1603 if (wpa_s->conf->cred == NULL || bss == NULL) 1604 return -1; 1605 if (disallowed_bssid(wpa_s, bss->bssid) || 1606 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { 1607 wpa_msg(wpa_s, MSG_DEBUG, 1608 "Interworking: Reject connection to disallowed BSS " 1609 MACSTR, MAC2STR(bss->bssid)); 1610 return -1; 1611 } 1612 1613 wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR 1614 " for connection", 1615 MAC2STR(bss->bssid)); 1616 1617 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) { 1618 /* 1619 * We currently support only HS 2.0 networks and those are 1620 * required to use WPA2-Enterprise. 1621 */ 1622 wpa_msg(wpa_s, MSG_DEBUG, 1623 "Interworking: Network does not use RSN"); 1624 return -1; 1625 } 1626 1627 cred_rc = interworking_credentials_available_roaming_consortium( 1628 wpa_s, bss, 0, excl); 1629 if (cred_rc) { 1630 wpa_msg(wpa_s, MSG_DEBUG, 1631 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d", 1632 cred_rc->priority, cred_rc->sp_priority); 1633 if (excl && !(*excl)) 1634 excl = NULL; 1635 } 1636 1637 cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl); 1638 if (cred) { 1639 wpa_msg(wpa_s, MSG_DEBUG, 1640 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d", 1641 cred->priority, cred->sp_priority); 1642 if (excl && !(*excl)) 1643 excl = NULL; 1644 } 1645 1646 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0, 1647 excl); 1648 if (cred_3gpp) { 1649 wpa_msg(wpa_s, MSG_DEBUG, 1650 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d", 1651 cred_3gpp->priority, cred_3gpp->sp_priority); 1652 if (excl && !(*excl)) 1653 excl = NULL; 1654 } 1655 1656 if (!cred_rc && !cred && !cred_3gpp) { 1657 wpa_msg(wpa_s, MSG_DEBUG, 1658 "Interworking: No full credential matches - consider options without BW(etc.) limits"); 1659 cred_rc = interworking_credentials_available_roaming_consortium( 1660 wpa_s, bss, 1, excl); 1661 if (cred_rc) { 1662 wpa_msg(wpa_s, MSG_DEBUG, 1663 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)", 1664 cred_rc->priority, cred_rc->sp_priority); 1665 if (excl && !(*excl)) 1666 excl = NULL; 1667 } 1668 1669 cred = interworking_credentials_available_realm(wpa_s, bss, 1, 1670 excl); 1671 if (cred) { 1672 wpa_msg(wpa_s, MSG_DEBUG, 1673 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)", 1674 cred->priority, cred->sp_priority); 1675 if (excl && !(*excl)) 1676 excl = NULL; 1677 } 1678 1679 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 1680 1, excl); 1681 if (cred_3gpp) { 1682 wpa_msg(wpa_s, MSG_DEBUG, 1683 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)", 1684 cred_3gpp->priority, cred_3gpp->sp_priority); 1685 if (excl && !(*excl)) 1686 excl = NULL; 1687 } 1688 } 1689 1690 if (cred_rc && 1691 (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) && 1692 (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0)) 1693 return interworking_connect_roaming_consortium(wpa_s, cred_rc, 1694 bss, only_add); 1695 1696 if (cred_3gpp && 1697 (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) { 1698 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss, 1699 only_add); 1700 } 1701 1702 if (cred == NULL) { 1703 wpa_msg(wpa_s, MSG_DEBUG, 1704 "Interworking: No matching credentials found for " 1705 MACSTR, MAC2STR(bss->bssid)); 1706 return -1; 1707 } 1708 1709 realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL, 1710 &count); 1711 if (realm == NULL) { 1712 wpa_msg(wpa_s, MSG_DEBUG, 1713 "Interworking: Could not parse NAI Realm list from " 1714 MACSTR, MAC2STR(bss->bssid)); 1715 return -1; 1716 } 1717 1718 for (i = 0; i < count; i++) { 1719 if (!nai_realm_match(&realm[i], cred->realm)) 1720 continue; 1721 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]); 1722 if (eap) 1723 break; 1724 } 1725 1726 if (!eap) { 1727 wpa_msg(wpa_s, MSG_DEBUG, 1728 "Interworking: No matching credentials and EAP method found for " 1729 MACSTR, MAC2STR(bss->bssid)); 1730 nai_realm_free(realm, count); 1731 return -1; 1732 } 1733 1734 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR, 1735 MAC2STR(bss->bssid)); 1736 1737 if (already_connected(wpa_s, cred, bss)) { 1738 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, 1739 MAC2STR(bss->bssid)); 1740 nai_realm_free(realm, count); 1741 return 0; 1742 } 1743 1744 remove_duplicate_network(wpa_s, cred, bss); 1745 1746 ssid = wpa_config_add_network(wpa_s->conf); 1747 if (ssid == NULL) { 1748 nai_realm_free(realm, count); 1749 return -1; 1750 } 1751 ssid->parent_cred = cred; 1752 wpas_notify_network_added(wpa_s, ssid); 1753 wpa_config_set_network_defaults(ssid); 1754 ssid->priority = cred->priority; 1755 ssid->temporary = 1; 1756 ssid->ssid = os_zalloc(bss->ssid_len + 1); 1757 if (ssid->ssid == NULL) 1758 goto fail; 1759 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); 1760 ssid->ssid_len = bss->ssid_len; 1761 1762 if (interworking_set_hs20_params(wpa_s, ssid) < 0) 1763 goto fail; 1764 1765 if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF, 1766 eap->method), 0) < 0) 1767 goto fail; 1768 1769 switch (eap->method) { 1770 case EAP_TYPE_TTLS: 1771 if (eap->inner_method) { 1772 os_snprintf(buf, sizeof(buf), "\"autheap=%s\"", 1773 eap_get_name(EAP_VENDOR_IETF, 1774 eap->inner_method)); 1775 if (wpa_config_set(ssid, "phase2", buf, 0) < 0) 1776 goto fail; 1777 break; 1778 } 1779 switch (eap->inner_non_eap) { 1780 case NAI_REALM_INNER_NON_EAP_PAP: 1781 if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) < 1782 0) 1783 goto fail; 1784 break; 1785 case NAI_REALM_INNER_NON_EAP_CHAP: 1786 if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0) 1787 < 0) 1788 goto fail; 1789 break; 1790 case NAI_REALM_INNER_NON_EAP_MSCHAP: 1791 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"", 1792 0) < 0) 1793 goto fail; 1794 break; 1795 case NAI_REALM_INNER_NON_EAP_MSCHAPV2: 1796 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"", 1797 0) < 0) 1798 goto fail; 1799 break; 1800 default: 1801 /* EAP params were not set - assume TTLS/MSCHAPv2 */ 1802 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"", 1803 0) < 0) 1804 goto fail; 1805 break; 1806 } 1807 break; 1808 case EAP_TYPE_PEAP: 1809 case EAP_TYPE_FAST: 1810 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"", 1811 0) < 0) 1812 goto fail; 1813 if (wpa_config_set(ssid, "pac_file", 1814 "\"blob://pac_interworking\"", 0) < 0) 1815 goto fail; 1816 name = eap_get_name(EAP_VENDOR_IETF, 1817 eap->inner_method ? eap->inner_method : 1818 EAP_TYPE_MSCHAPV2); 1819 if (name == NULL) 1820 goto fail; 1821 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name); 1822 if (wpa_config_set(ssid, "phase2", buf, 0) < 0) 1823 goto fail; 1824 break; 1825 case EAP_TYPE_TLS: 1826 break; 1827 } 1828 1829 if (interworking_set_eap_params(ssid, cred, 1830 eap->method == EAP_TYPE_TTLS) < 0) 1831 goto fail; 1832 1833 nai_realm_free(realm, count); 1834 1835 wpa_s->next_ssid = ssid; 1836 wpa_config_update_prio_list(wpa_s->conf); 1837 if (!only_add) 1838 interworking_reconnect(wpa_s); 1839 1840 return ssid->id; 1841 1842 fail: 1843 wpas_notify_network_removed(wpa_s, ssid); 1844 wpa_config_remove_network(wpa_s->conf, ssid->id); 1845 nai_realm_free(realm, count); 1846 return -1; 1847 } 1848 1849 1850 #ifdef PCSC_FUNCS 1851 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s) 1852 { 1853 size_t len; 1854 1855 if (wpa_s->imsi[0] && wpa_s->mnc_len) 1856 return 0; 1857 1858 len = sizeof(wpa_s->imsi) - 1; 1859 if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) { 1860 scard_deinit(wpa_s->scard); 1861 wpa_s->scard = NULL; 1862 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI"); 1863 return -1; 1864 } 1865 wpa_s->imsi[len] = '\0'; 1866 wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard); 1867 wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)", 1868 wpa_s->imsi, wpa_s->mnc_len); 1869 1870 return 0; 1871 } 1872 #endif /* PCSC_FUNCS */ 1873 1874 1875 static struct wpa_cred * interworking_credentials_available_3gpp( 1876 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 1877 int *excluded) 1878 { 1879 struct wpa_cred *selected = NULL; 1880 #ifdef INTERWORKING_3GPP 1881 struct wpa_cred *cred; 1882 int ret; 1883 int is_excluded = 0; 1884 1885 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) { 1886 wpa_msg(wpa_s, MSG_DEBUG, 1887 "interworking-avail-3gpp: not avail, anqp: %p anqp_3gpp: %p", 1888 bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL); 1889 return NULL; 1890 } 1891 1892 #ifdef CONFIG_EAP_PROXY 1893 if (!wpa_s->imsi[0]) { 1894 size_t len; 1895 wpa_msg(wpa_s, MSG_DEBUG, 1896 "Interworking: IMSI not available - try to read again through eap_proxy"); 1897 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol, 1898 wpa_s->imsi, 1899 &len); 1900 if (wpa_s->mnc_len > 0) { 1901 wpa_s->imsi[len] = '\0'; 1902 wpa_msg(wpa_s, MSG_DEBUG, 1903 "eap_proxy: IMSI %s (MNC length %d)", 1904 wpa_s->imsi, wpa_s->mnc_len); 1905 } else { 1906 wpa_msg(wpa_s, MSG_DEBUG, 1907 "eap_proxy: IMSI not available"); 1908 } 1909 } 1910 #endif /* CONFIG_EAP_PROXY */ 1911 1912 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 1913 char *sep; 1914 const char *imsi; 1915 int mnc_len; 1916 char imsi_buf[16]; 1917 size_t msin_len; 1918 1919 #ifdef PCSC_FUNCS 1920 if (cred->pcsc && wpa_s->scard) { 1921 if (interworking_pcsc_read_imsi(wpa_s) < 0) 1922 continue; 1923 imsi = wpa_s->imsi; 1924 mnc_len = wpa_s->mnc_len; 1925 goto compare; 1926 } 1927 #endif /* PCSC_FUNCS */ 1928 #ifdef CONFIG_EAP_PROXY 1929 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) { 1930 imsi = wpa_s->imsi; 1931 mnc_len = wpa_s->mnc_len; 1932 goto compare; 1933 } 1934 #endif /* CONFIG_EAP_PROXY */ 1935 1936 if (cred->imsi == NULL || !cred->imsi[0] || 1937 (!wpa_s->conf->external_sim && 1938 (cred->milenage == NULL || !cred->milenage[0]))) 1939 continue; 1940 1941 sep = os_strchr(cred->imsi, '-'); 1942 if (sep == NULL || 1943 (sep - cred->imsi != 5 && sep - cred->imsi != 6)) 1944 continue; 1945 mnc_len = sep - cred->imsi - 3; 1946 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len); 1947 sep++; 1948 msin_len = os_strlen(cred->imsi); 1949 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1) 1950 msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1; 1951 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len); 1952 imsi_buf[3 + mnc_len + msin_len] = '\0'; 1953 imsi = imsi_buf; 1954 1955 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY) 1956 compare: 1957 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */ 1958 wpa_msg(wpa_s, MSG_DEBUG, 1959 "Interworking: Parsing 3GPP info from " MACSTR, 1960 MAC2STR(bss->bssid)); 1961 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len); 1962 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound", 1963 ret ? "" : "not "); 1964 if (ret) { 1965 if (cred_no_required_oi_match(cred, bss)) 1966 continue; 1967 if (!ignore_bw && 1968 cred_below_min_backhaul(wpa_s, cred, bss)) 1969 continue; 1970 if (!ignore_bw && 1971 cred_over_max_bss_load(wpa_s, cred, bss)) 1972 continue; 1973 if (!ignore_bw && 1974 cred_conn_capab_missing(wpa_s, cred, bss)) 1975 continue; 1976 if (cred_excluded_ssid(cred, bss)) { 1977 if (excluded == NULL) 1978 continue; 1979 if (selected == NULL) { 1980 selected = cred; 1981 is_excluded = 1; 1982 } 1983 } else { 1984 if (selected == NULL || is_excluded || 1985 cred_prio_cmp(selected, cred) < 0) { 1986 selected = cred; 1987 is_excluded = 0; 1988 } 1989 } 1990 } 1991 } 1992 1993 if (excluded) 1994 *excluded = is_excluded; 1995 #endif /* INTERWORKING_3GPP */ 1996 return selected; 1997 } 1998 1999 2000 static struct wpa_cred * interworking_credentials_available_realm( 2001 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 2002 int *excluded) 2003 { 2004 struct wpa_cred *cred, *selected = NULL; 2005 struct nai_realm *realm; 2006 u16 count, i; 2007 int is_excluded = 0; 2008 2009 if (bss->anqp == NULL || bss->anqp->nai_realm == NULL) 2010 return NULL; 2011 2012 if (wpa_s->conf->cred == NULL) 2013 return NULL; 2014 2015 wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from " 2016 MACSTR, MAC2STR(bss->bssid)); 2017 realm = nai_realm_parse(bss->anqp->nai_realm, &count); 2018 if (realm == NULL) { 2019 wpa_msg(wpa_s, MSG_DEBUG, 2020 "Interworking: Could not parse NAI Realm list from " 2021 MACSTR, MAC2STR(bss->bssid)); 2022 return NULL; 2023 } 2024 2025 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 2026 if (cred->realm == NULL) 2027 continue; 2028 2029 for (i = 0; i < count; i++) { 2030 if (!nai_realm_match(&realm[i], cred->realm)) 2031 continue; 2032 if (nai_realm_find_eap(wpa_s, cred, &realm[i])) { 2033 if (cred_no_required_oi_match(cred, bss)) 2034 continue; 2035 if (!ignore_bw && 2036 cred_below_min_backhaul(wpa_s, cred, bss)) 2037 continue; 2038 if (!ignore_bw && 2039 cred_over_max_bss_load(wpa_s, cred, bss)) 2040 continue; 2041 if (!ignore_bw && 2042 cred_conn_capab_missing(wpa_s, cred, bss)) 2043 continue; 2044 if (cred_excluded_ssid(cred, bss)) { 2045 if (excluded == NULL) 2046 continue; 2047 if (selected == NULL) { 2048 selected = cred; 2049 is_excluded = 1; 2050 } 2051 } else { 2052 if (selected == NULL || is_excluded || 2053 cred_prio_cmp(selected, cred) < 0) 2054 { 2055 selected = cred; 2056 is_excluded = 0; 2057 } 2058 } 2059 break; 2060 } else { 2061 wpa_msg(wpa_s, MSG_DEBUG, 2062 "Interworking: realm-find-eap returned false"); 2063 } 2064 } 2065 } 2066 2067 nai_realm_free(realm, count); 2068 2069 if (excluded) 2070 *excluded = is_excluded; 2071 2072 return selected; 2073 } 2074 2075 2076 static struct wpa_cred * interworking_credentials_available_helper( 2077 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 2078 int *excluded) 2079 { 2080 struct wpa_cred *cred, *cred2; 2081 int excluded1, excluded2 = 0; 2082 2083 if (disallowed_bssid(wpa_s, bss->bssid) || 2084 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { 2085 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS " 2086 MACSTR, MAC2STR(bss->bssid)); 2087 return NULL; 2088 } 2089 2090 cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw, 2091 &excluded1); 2092 cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw, 2093 &excluded2); 2094 if (cred && cred2 && 2095 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) { 2096 cred = cred2; 2097 excluded1 = excluded2; 2098 } 2099 if (!cred) { 2100 cred = cred2; 2101 excluded1 = excluded2; 2102 } 2103 2104 cred2 = interworking_credentials_available_roaming_consortium( 2105 wpa_s, bss, ignore_bw, &excluded2); 2106 if (cred && cred2 && 2107 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) { 2108 cred = cred2; 2109 excluded1 = excluded2; 2110 } 2111 if (!cred) { 2112 cred = cred2; 2113 excluded1 = excluded2; 2114 } 2115 2116 if (excluded) 2117 *excluded = excluded1; 2118 return cred; 2119 } 2120 2121 2122 static struct wpa_cred * interworking_credentials_available( 2123 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded) 2124 { 2125 struct wpa_cred *cred; 2126 2127 if (excluded) 2128 *excluded = 0; 2129 cred = interworking_credentials_available_helper(wpa_s, bss, 0, 2130 excluded); 2131 if (cred) 2132 return cred; 2133 return interworking_credentials_available_helper(wpa_s, bss, 1, 2134 excluded); 2135 } 2136 2137 2138 int domain_name_list_contains(struct wpabuf *domain_names, 2139 const char *domain, int exact_match) 2140 { 2141 const u8 *pos, *end; 2142 size_t len; 2143 2144 len = os_strlen(domain); 2145 pos = wpabuf_head(domain_names); 2146 end = pos + wpabuf_len(domain_names); 2147 2148 while (end - pos > 1) { 2149 u8 elen; 2150 2151 elen = *pos++; 2152 if (elen > end - pos) 2153 break; 2154 2155 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name", 2156 pos, elen); 2157 if (elen == len && 2158 os_strncasecmp(domain, (const char *) pos, len) == 0) 2159 return 1; 2160 if (!exact_match && elen > len && pos[elen - len - 1] == '.') { 2161 const char *ap = (const char *) pos; 2162 int offset = elen - len; 2163 2164 if (os_strncasecmp(domain, ap + offset, len) == 0) 2165 return 1; 2166 } 2167 2168 pos += elen; 2169 } 2170 2171 return 0; 2172 } 2173 2174 2175 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s, 2176 struct wpa_cred *cred, 2177 struct wpabuf *domain_names) 2178 { 2179 size_t i; 2180 int ret = -1; 2181 #ifdef INTERWORKING_3GPP 2182 char nai[100], *realm; 2183 2184 char *imsi = NULL; 2185 int mnc_len = 0; 2186 if (cred->imsi) 2187 imsi = cred->imsi; 2188 #ifdef PCSC_FUNCS 2189 else if (cred->pcsc && wpa_s->scard) { 2190 if (interworking_pcsc_read_imsi(wpa_s) < 0) 2191 return -1; 2192 imsi = wpa_s->imsi; 2193 mnc_len = wpa_s->mnc_len; 2194 } 2195 #endif /* PCSC_FUNCS */ 2196 #ifdef CONFIG_EAP_PROXY 2197 else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) { 2198 imsi = wpa_s->imsi; 2199 mnc_len = wpa_s->mnc_len; 2200 } 2201 #endif /* CONFIG_EAP_PROXY */ 2202 if (domain_names && 2203 imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) { 2204 realm = os_strchr(nai, '@'); 2205 if (realm) 2206 realm++; 2207 wpa_msg(wpa_s, MSG_DEBUG, 2208 "Interworking: Search for match with SIM/USIM domain %s", 2209 realm); 2210 if (realm && 2211 domain_name_list_contains(domain_names, realm, 1)) 2212 return 1; 2213 if (realm) 2214 ret = 0; 2215 } 2216 #endif /* INTERWORKING_3GPP */ 2217 2218 if (domain_names == NULL || cred->domain == NULL) 2219 return ret; 2220 2221 for (i = 0; i < cred->num_domain; i++) { 2222 wpa_msg(wpa_s, MSG_DEBUG, 2223 "Interworking: Search for match with home SP FQDN %s", 2224 cred->domain[i]); 2225 if (domain_name_list_contains(domain_names, cred->domain[i], 1)) 2226 return 1; 2227 } 2228 2229 return 0; 2230 } 2231 2232 2233 static int interworking_home_sp(struct wpa_supplicant *wpa_s, 2234 struct wpabuf *domain_names) 2235 { 2236 struct wpa_cred *cred; 2237 2238 if (domain_names == NULL || wpa_s->conf->cred == NULL) 2239 return -1; 2240 2241 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 2242 int res = interworking_home_sp_cred(wpa_s, cred, domain_names); 2243 if (res) 2244 return res; 2245 } 2246 2247 return 0; 2248 } 2249 2250 2251 static int interworking_find_network_match(struct wpa_supplicant *wpa_s) 2252 { 2253 struct wpa_bss *bss; 2254 struct wpa_ssid *ssid; 2255 2256 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2257 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 2258 if (wpas_network_disabled(wpa_s, ssid) || 2259 ssid->mode != WPAS_MODE_INFRA) 2260 continue; 2261 if (ssid->ssid_len != bss->ssid_len || 2262 os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) != 2263 0) 2264 continue; 2265 /* 2266 * TODO: Consider more accurate matching of security 2267 * configuration similarly to what is done in events.c 2268 */ 2269 return 1; 2270 } 2271 } 2272 2273 return 0; 2274 } 2275 2276 2277 static int roaming_partner_match(struct wpa_supplicant *wpa_s, 2278 struct roaming_partner *partner, 2279 struct wpabuf *domain_names) 2280 { 2281 wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'", 2282 partner->fqdn, partner->exact_match, partner->priority, 2283 partner->country); 2284 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names", 2285 wpabuf_head(domain_names), 2286 wpabuf_len(domain_names)); 2287 if (!domain_name_list_contains(domain_names, partner->fqdn, 2288 partner->exact_match)) 2289 return 0; 2290 /* TODO: match Country */ 2291 return 1; 2292 } 2293 2294 2295 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, 2296 struct wpa_bss *bss) 2297 { 2298 size_t i; 2299 2300 if (bss->anqp == NULL || bss->anqp->domain_name == NULL) { 2301 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128"); 2302 return 128; /* cannot check preference with domain name */ 2303 } 2304 2305 if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0) 2306 { 2307 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority"); 2308 return 0; /* max preference for home SP network */ 2309 } 2310 2311 for (i = 0; i < cred->num_roaming_partner; i++) { 2312 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i], 2313 bss->anqp->domain_name)) { 2314 wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u", 2315 cred->roaming_partner[i].priority); 2316 return cred->roaming_partner[i].priority; 2317 } 2318 } 2319 2320 wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128"); 2321 return 128; 2322 } 2323 2324 2325 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s, 2326 struct wpa_bss *selected, 2327 struct wpa_cred *cred) 2328 { 2329 struct wpa_bss *bss; 2330 u8 best_prio, prio; 2331 struct wpa_cred *cred2; 2332 2333 /* 2334 * Check if any other BSS is operated by a more preferred roaming 2335 * partner. 2336 */ 2337 2338 best_prio = roaming_prio(wpa_s, cred, selected); 2339 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS " 2340 MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid), 2341 cred->id); 2342 2343 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2344 if (bss == selected) 2345 continue; 2346 cred2 = interworking_credentials_available(wpa_s, bss, NULL); 2347 if (!cred2) 2348 continue; 2349 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) 2350 continue; 2351 prio = roaming_prio(wpa_s, cred2, bss); 2352 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS " 2353 MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid), 2354 cred2->id); 2355 if (prio < best_prio) { 2356 int bh1, bh2, load1, load2, conn1, conn2; 2357 bh1 = cred_below_min_backhaul(wpa_s, cred, selected); 2358 load1 = cred_over_max_bss_load(wpa_s, cred, selected); 2359 conn1 = cred_conn_capab_missing(wpa_s, cred, selected); 2360 bh2 = cred_below_min_backhaul(wpa_s, cred2, bss); 2361 load2 = cred_over_max_bss_load(wpa_s, cred2, bss); 2362 conn2 = cred_conn_capab_missing(wpa_s, cred2, bss); 2363 wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d", 2364 bh1, load1, conn1, bh2, load2, conn2); 2365 if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) { 2366 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid)); 2367 best_prio = prio; 2368 selected = bss; 2369 } 2370 } 2371 } 2372 2373 return selected; 2374 } 2375 2376 2377 static void interworking_select_network(struct wpa_supplicant *wpa_s) 2378 { 2379 struct wpa_bss *bss, *selected = NULL, *selected_home = NULL; 2380 struct wpa_bss *selected2 = NULL, *selected2_home = NULL; 2381 unsigned int count = 0; 2382 const char *type; 2383 int res; 2384 struct wpa_cred *cred, *selected_cred = NULL; 2385 struct wpa_cred *selected_home_cred = NULL; 2386 struct wpa_cred *selected2_cred = NULL; 2387 struct wpa_cred *selected2_home_cred = NULL; 2388 2389 wpa_s->network_select = 0; 2390 2391 wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)", 2392 wpa_s->auto_select); 2393 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2394 int excluded = 0; 2395 int bh, bss_load, conn_capab; 2396 cred = interworking_credentials_available(wpa_s, bss, 2397 &excluded); 2398 if (!cred) 2399 continue; 2400 2401 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) { 2402 /* 2403 * We currently support only HS 2.0 networks and those 2404 * are required to use WPA2-Enterprise. 2405 */ 2406 wpa_msg(wpa_s, MSG_DEBUG, 2407 "Interworking: Credential match with " MACSTR 2408 " but network does not use RSN", 2409 MAC2STR(bss->bssid)); 2410 continue; 2411 } 2412 if (!excluded) 2413 count++; 2414 res = interworking_home_sp(wpa_s, bss->anqp ? 2415 bss->anqp->domain_name : NULL); 2416 if (res > 0) 2417 type = "home"; 2418 else if (res == 0) 2419 type = "roaming"; 2420 else 2421 type = "unknown"; 2422 bh = cred_below_min_backhaul(wpa_s, cred, bss); 2423 bss_load = cred_over_max_bss_load(wpa_s, cred, bss); 2424 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss); 2425 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d", 2426 excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP, 2427 MAC2STR(bss->bssid), type, 2428 bh ? " below_min_backhaul=1" : "", 2429 bss_load ? " over_max_bss_load=1" : "", 2430 conn_capab ? " conn_capab_missing=1" : "", 2431 cred->id, cred->priority, cred->sp_priority); 2432 if (excluded) 2433 continue; 2434 if (wpa_s->auto_select || 2435 (wpa_s->conf->auto_interworking && 2436 wpa_s->auto_network_select)) { 2437 if (bh || bss_load || conn_capab) { 2438 if (selected2_cred == NULL || 2439 cred_prio_cmp(cred, selected2_cred) > 0) { 2440 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2"); 2441 selected2 = bss; 2442 selected2_cred = cred; 2443 } 2444 if (res > 0 && 2445 (selected2_home_cred == NULL || 2446 cred_prio_cmp(cred, selected2_home_cred) > 2447 0)) { 2448 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home"); 2449 selected2_home = bss; 2450 selected2_home_cred = cred; 2451 } 2452 } else { 2453 if (selected_cred == NULL || 2454 cred_prio_cmp(cred, selected_cred) > 0) { 2455 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected"); 2456 selected = bss; 2457 selected_cred = cred; 2458 } 2459 if (res > 0 && 2460 (selected_home_cred == NULL || 2461 cred_prio_cmp(cred, selected_home_cred) > 2462 0)) { 2463 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home"); 2464 selected_home = bss; 2465 selected_home_cred = cred; 2466 } 2467 } 2468 } 2469 } 2470 2471 if (selected_home && selected_home != selected && 2472 selected_home_cred && 2473 (selected_cred == NULL || 2474 cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) { 2475 /* Prefer network operated by the Home SP */ 2476 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home"); 2477 selected = selected_home; 2478 selected_cred = selected_home_cred; 2479 } 2480 2481 if (!selected) { 2482 if (selected2_home) { 2483 wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected"); 2484 selected = selected2_home; 2485 selected_cred = selected2_home_cred; 2486 } else if (selected2) { 2487 wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected"); 2488 selected = selected2; 2489 selected_cred = selected2_cred; 2490 } 2491 } 2492 2493 if (count == 0) { 2494 /* 2495 * No matching network was found based on configured 2496 * credentials. Check whether any of the enabled network blocks 2497 * have matching APs. 2498 */ 2499 if (interworking_find_network_match(wpa_s)) { 2500 wpa_msg(wpa_s, MSG_DEBUG, 2501 "Interworking: Possible BSS match for enabled network configurations"); 2502 if (wpa_s->auto_select) { 2503 interworking_reconnect(wpa_s); 2504 return; 2505 } 2506 } 2507 2508 if (wpa_s->auto_network_select) { 2509 wpa_msg(wpa_s, MSG_DEBUG, 2510 "Interworking: Continue scanning after ANQP fetch"); 2511 wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 2512 0); 2513 return; 2514 } 2515 2516 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network " 2517 "with matching credentials found"); 2518 if (wpa_s->wpa_state == WPA_SCANNING) 2519 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 2520 } 2521 2522 if (selected) { 2523 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR, 2524 MAC2STR(selected->bssid)); 2525 selected = pick_best_roaming_partner(wpa_s, selected, 2526 selected_cred); 2527 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR 2528 " (after best roaming partner selection)", 2529 MAC2STR(selected->bssid)); 2530 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR, 2531 MAC2STR(selected->bssid)); 2532 interworking_connect(wpa_s, selected, 0); 2533 } else if (wpa_s->wpa_state == WPA_SCANNING) 2534 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 2535 } 2536 2537 2538 static struct wpa_bss_anqp * 2539 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) 2540 { 2541 struct wpa_bss *other; 2542 2543 if (is_zero_ether_addr(bss->hessid)) 2544 return NULL; /* Cannot be in the same homegenous ESS */ 2545 2546 dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) { 2547 if (other == bss) 2548 continue; 2549 if (other->anqp == NULL) 2550 continue; 2551 if (other->anqp->roaming_consortium == NULL && 2552 other->anqp->nai_realm == NULL && 2553 other->anqp->anqp_3gpp == NULL && 2554 other->anqp->domain_name == NULL) 2555 continue; 2556 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED)) 2557 continue; 2558 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0) 2559 continue; 2560 if (bss->ssid_len != other->ssid_len || 2561 os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0) 2562 continue; 2563 2564 wpa_msg(wpa_s, MSG_DEBUG, 2565 "Interworking: Share ANQP data with already fetched BSSID " 2566 MACSTR " and " MACSTR, 2567 MAC2STR(other->bssid), MAC2STR(bss->bssid)); 2568 other->anqp->users++; 2569 return other->anqp; 2570 } 2571 2572 return NULL; 2573 } 2574 2575 2576 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s) 2577 { 2578 struct wpa_bss *bss; 2579 int found = 0; 2580 const u8 *ie; 2581 2582 wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - " 2583 "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d", 2584 wpa_s->fetch_anqp_in_progress, 2585 wpa_s->fetch_osu_icon_in_progress); 2586 2587 if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) { 2588 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch"); 2589 return; 2590 } 2591 2592 #ifdef CONFIG_HS20 2593 if (wpa_s->fetch_osu_icon_in_progress) { 2594 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)"); 2595 hs20_next_osu_icon(wpa_s); 2596 return; 2597 } 2598 #endif /* CONFIG_HS20 */ 2599 2600 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2601 if (!(bss->caps & IEEE80211_CAP_ESS)) 2602 continue; 2603 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB); 2604 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80)) 2605 continue; /* AP does not support Interworking */ 2606 if (disallowed_bssid(wpa_s, bss->bssid) || 2607 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) 2608 continue; /* Disallowed BSS */ 2609 2610 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) { 2611 if (bss->anqp == NULL) { 2612 bss->anqp = interworking_match_anqp_info(wpa_s, 2613 bss); 2614 if (bss->anqp) { 2615 /* Shared data already fetched */ 2616 continue; 2617 } 2618 bss->anqp = wpa_bss_anqp_alloc(); 2619 if (bss->anqp == NULL) 2620 break; 2621 } 2622 found++; 2623 bss->flags |= WPA_BSS_ANQP_FETCH_TRIED; 2624 wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for " 2625 MACSTR, MAC2STR(bss->bssid)); 2626 interworking_anqp_send_req(wpa_s, bss); 2627 break; 2628 } 2629 } 2630 2631 if (found == 0) { 2632 #ifdef CONFIG_HS20 2633 if (wpa_s->fetch_osu_info) { 2634 if (wpa_s->num_prov_found == 0 && 2635 wpa_s->fetch_osu_waiting_scan && 2636 wpa_s->num_osu_scans < 3) { 2637 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again"); 2638 hs20_start_osu_scan(wpa_s); 2639 return; 2640 } 2641 wpa_printf(MSG_DEBUG, "Interworking: Next icon"); 2642 hs20_osu_icon_fetch(wpa_s); 2643 return; 2644 } 2645 #endif /* CONFIG_HS20 */ 2646 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed"); 2647 wpa_s->fetch_anqp_in_progress = 0; 2648 if (wpa_s->network_select) 2649 interworking_select_network(wpa_s); 2650 } 2651 } 2652 2653 2654 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s) 2655 { 2656 struct wpa_bss *bss; 2657 2658 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) 2659 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED; 2660 2661 wpa_s->fetch_anqp_in_progress = 1; 2662 2663 /* 2664 * Start actual ANQP operation from eloop call to make sure the loop 2665 * does not end up using excessive recursion. 2666 */ 2667 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL); 2668 } 2669 2670 2671 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s) 2672 { 2673 if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select) 2674 return 0; 2675 2676 wpa_s->network_select = 0; 2677 wpa_s->fetch_all_anqp = 1; 2678 wpa_s->fetch_osu_info = 0; 2679 2680 interworking_start_fetch_anqp(wpa_s); 2681 2682 return 0; 2683 } 2684 2685 2686 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s) 2687 { 2688 if (!wpa_s->fetch_anqp_in_progress) 2689 return; 2690 2691 wpa_s->fetch_anqp_in_progress = 0; 2692 } 2693 2694 2695 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, 2696 u16 info_ids[], size_t num_ids, u32 subtypes, 2697 int get_cell_pref) 2698 { 2699 struct wpabuf *buf; 2700 struct wpabuf *extra_buf = NULL; 2701 int ret = 0; 2702 int freq; 2703 struct wpa_bss *bss; 2704 int res; 2705 2706 bss = wpa_bss_get_bssid(wpa_s, dst); 2707 if (!bss) { 2708 wpa_printf(MSG_WARNING, 2709 "ANQP: Cannot send query to unknown BSS " 2710 MACSTR, MAC2STR(dst)); 2711 return -1; 2712 } 2713 2714 wpa_bss_anqp_unshare_alloc(bss); 2715 freq = bss->freq; 2716 2717 wpa_msg(wpa_s, MSG_DEBUG, 2718 "ANQP: Query Request to " MACSTR " for %u id(s)", 2719 MAC2STR(dst), (unsigned int) num_ids); 2720 2721 #ifdef CONFIG_HS20 2722 if (subtypes != 0) { 2723 extra_buf = wpabuf_alloc(100); 2724 if (extra_buf == NULL) 2725 return -1; 2726 hs20_put_anqp_req(subtypes, NULL, 0, extra_buf); 2727 } 2728 #endif /* CONFIG_HS20 */ 2729 2730 #ifdef CONFIG_MBO 2731 if (get_cell_pref) { 2732 struct wpabuf *mbo; 2733 2734 mbo = mbo_build_anqp_buf(wpa_s, bss); 2735 if (mbo) { 2736 if (wpabuf_resize(&extra_buf, wpabuf_len(mbo))) { 2737 wpabuf_free(extra_buf); 2738 return -1; 2739 } 2740 wpabuf_put_buf(extra_buf, mbo); 2741 wpabuf_free(mbo); 2742 } 2743 } 2744 #endif /* CONFIG_MBO */ 2745 2746 buf = anqp_build_req(info_ids, num_ids, extra_buf); 2747 wpabuf_free(extra_buf); 2748 if (buf == NULL) 2749 return -1; 2750 2751 res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s); 2752 if (res < 0) { 2753 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request"); 2754 wpabuf_free(buf); 2755 ret = -1; 2756 } else { 2757 wpa_msg(wpa_s, MSG_DEBUG, 2758 "ANQP: Query started with dialog token %u", res); 2759 } 2760 2761 return ret; 2762 } 2763 2764 2765 static void anqp_add_extra(struct wpa_supplicant *wpa_s, 2766 struct wpa_bss_anqp *anqp, u16 info_id, 2767 const u8 *data, size_t slen) 2768 { 2769 struct wpa_bss_anqp_elem *tmp, *elem = NULL; 2770 2771 if (!anqp) 2772 return; 2773 2774 dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem, 2775 list) { 2776 if (tmp->infoid == info_id) { 2777 elem = tmp; 2778 break; 2779 } 2780 } 2781 2782 if (!elem) { 2783 elem = os_zalloc(sizeof(*elem)); 2784 if (!elem) 2785 return; 2786 elem->infoid = info_id; 2787 dl_list_add(&anqp->anqp_elems, &elem->list); 2788 } else { 2789 wpabuf_free(elem->payload); 2790 } 2791 2792 elem->payload = wpabuf_alloc_copy(data, slen); 2793 if (!elem->payload) { 2794 dl_list_del(&elem->list); 2795 os_free(elem); 2796 } 2797 } 2798 2799 2800 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s, 2801 struct wpa_bss *bss, const u8 *sa, 2802 u16 info_id, 2803 const u8 *data, size_t slen, 2804 u8 dialog_token) 2805 { 2806 const u8 *pos = data; 2807 struct wpa_bss_anqp *anqp = NULL; 2808 #ifdef CONFIG_HS20 2809 u8 type; 2810 #endif /* CONFIG_HS20 */ 2811 2812 if (bss) 2813 anqp = bss->anqp; 2814 2815 switch (info_id) { 2816 case ANQP_CAPABILITY_LIST: 2817 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2818 " ANQP Capability list", MAC2STR(sa)); 2819 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list", 2820 pos, slen); 2821 if (anqp) { 2822 wpabuf_free(anqp->capability_list); 2823 anqp->capability_list = wpabuf_alloc_copy(pos, slen); 2824 } 2825 break; 2826 case ANQP_VENUE_NAME: 2827 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2828 " Venue Name", MAC2STR(sa)); 2829 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen); 2830 if (anqp) { 2831 wpabuf_free(anqp->venue_name); 2832 anqp->venue_name = wpabuf_alloc_copy(pos, slen); 2833 } 2834 break; 2835 case ANQP_NETWORK_AUTH_TYPE: 2836 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2837 " Network Authentication Type information", 2838 MAC2STR(sa)); 2839 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication " 2840 "Type", pos, slen); 2841 if (anqp) { 2842 wpabuf_free(anqp->network_auth_type); 2843 anqp->network_auth_type = wpabuf_alloc_copy(pos, slen); 2844 } 2845 break; 2846 case ANQP_ROAMING_CONSORTIUM: 2847 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2848 " Roaming Consortium list", MAC2STR(sa)); 2849 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium", 2850 pos, slen); 2851 if (anqp) { 2852 wpabuf_free(anqp->roaming_consortium); 2853 anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen); 2854 } 2855 break; 2856 case ANQP_IP_ADDR_TYPE_AVAILABILITY: 2857 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2858 " IP Address Type Availability information", 2859 MAC2STR(sa)); 2860 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability", 2861 pos, slen); 2862 if (anqp) { 2863 wpabuf_free(anqp->ip_addr_type_availability); 2864 anqp->ip_addr_type_availability = 2865 wpabuf_alloc_copy(pos, slen); 2866 } 2867 break; 2868 case ANQP_NAI_REALM: 2869 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2870 " NAI Realm list", MAC2STR(sa)); 2871 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen); 2872 if (anqp) { 2873 wpabuf_free(anqp->nai_realm); 2874 anqp->nai_realm = wpabuf_alloc_copy(pos, slen); 2875 } 2876 break; 2877 case ANQP_3GPP_CELLULAR_NETWORK: 2878 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2879 " 3GPP Cellular Network information", MAC2STR(sa)); 2880 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network", 2881 pos, slen); 2882 if (anqp) { 2883 wpabuf_free(anqp->anqp_3gpp); 2884 anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen); 2885 } 2886 break; 2887 case ANQP_DOMAIN_NAME: 2888 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2889 " Domain Name list", MAC2STR(sa)); 2890 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen); 2891 if (anqp) { 2892 wpabuf_free(anqp->domain_name); 2893 anqp->domain_name = wpabuf_alloc_copy(pos, slen); 2894 } 2895 break; 2896 #ifdef CONFIG_FILS 2897 case ANQP_FILS_REALM_INFO: 2898 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR 2899 " FILS Realm Information", MAC2STR(sa)); 2900 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: FILS Realm Information", 2901 pos, slen); 2902 if (anqp) { 2903 wpabuf_free(anqp->fils_realm_info); 2904 anqp->fils_realm_info = wpabuf_alloc_copy(pos, slen); 2905 } 2906 break; 2907 #endif /* CONFIG_FILS */ 2908 case ANQP_VENDOR_SPECIFIC: 2909 if (slen < 3) 2910 return; 2911 2912 switch (WPA_GET_BE24(pos)) { 2913 #ifdef CONFIG_HS20 2914 case OUI_WFA: 2915 pos += 3; 2916 slen -= 3; 2917 2918 if (slen < 1) 2919 return; 2920 type = *pos++; 2921 slen--; 2922 2923 switch (type) { 2924 case HS20_ANQP_OUI_TYPE: 2925 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa, 2926 pos, slen, 2927 dialog_token); 2928 break; 2929 default: 2930 wpa_msg(wpa_s, MSG_DEBUG, 2931 "HS20: Unsupported ANQP vendor type %u", 2932 type); 2933 break; 2934 } 2935 break; 2936 #endif /* CONFIG_HS20 */ 2937 default: 2938 wpa_msg(wpa_s, MSG_DEBUG, 2939 "Interworking: Unsupported vendor-specific ANQP OUI %06x", 2940 WPA_GET_BE24(pos)); 2941 return; 2942 } 2943 break; 2944 default: 2945 wpa_msg(wpa_s, MSG_DEBUG, 2946 "Interworking: Unsupported ANQP Info ID %u", info_id); 2947 anqp_add_extra(wpa_s, anqp, info_id, data, slen); 2948 break; 2949 } 2950 } 2951 2952 2953 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token, 2954 enum gas_query_result result, 2955 const struct wpabuf *adv_proto, 2956 const struct wpabuf *resp, u16 status_code) 2957 { 2958 struct wpa_supplicant *wpa_s = ctx; 2959 const u8 *pos; 2960 const u8 *end; 2961 u16 info_id; 2962 u16 slen; 2963 struct wpa_bss *bss = NULL, *tmp; 2964 const char *anqp_result = "SUCCESS"; 2965 2966 wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR 2967 " dialog_token=%u result=%d status_code=%u", 2968 MAC2STR(dst), dialog_token, result, status_code); 2969 if (result != GAS_QUERY_SUCCESS) { 2970 #ifdef CONFIG_HS20 2971 if (wpa_s->fetch_osu_icon_in_progress) 2972 hs20_icon_fetch_failed(wpa_s); 2973 #endif /* CONFIG_HS20 */ 2974 anqp_result = "FAILURE"; 2975 goto out; 2976 } 2977 2978 pos = wpabuf_head(adv_proto); 2979 if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO || 2980 pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) { 2981 wpa_msg(wpa_s, MSG_DEBUG, 2982 "ANQP: Unexpected Advertisement Protocol in response"); 2983 #ifdef CONFIG_HS20 2984 if (wpa_s->fetch_osu_icon_in_progress) 2985 hs20_icon_fetch_failed(wpa_s); 2986 #endif /* CONFIG_HS20 */ 2987 anqp_result = "INVALID_FRAME"; 2988 goto out; 2989 } 2990 2991 /* 2992 * If possible, select the BSS entry based on which BSS entry was used 2993 * for the request. This can help in cases where multiple BSS entries 2994 * may exist for the same AP. 2995 */ 2996 dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) { 2997 if (tmp == wpa_s->interworking_gas_bss && 2998 os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) { 2999 bss = tmp; 3000 break; 3001 } 3002 } 3003 if (bss == NULL) 3004 bss = wpa_bss_get_bssid(wpa_s, dst); 3005 3006 pos = wpabuf_head(resp); 3007 end = pos + wpabuf_len(resp); 3008 3009 while (pos < end) { 3010 unsigned int left = end - pos; 3011 3012 if (left < 4) { 3013 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element"); 3014 anqp_result = "INVALID_FRAME"; 3015 goto out_parse_done; 3016 } 3017 info_id = WPA_GET_LE16(pos); 3018 pos += 2; 3019 slen = WPA_GET_LE16(pos); 3020 pos += 2; 3021 left -= 4; 3022 if (left < slen) { 3023 wpa_msg(wpa_s, MSG_DEBUG, 3024 "ANQP: Invalid element length for Info ID %u", 3025 info_id); 3026 anqp_result = "INVALID_FRAME"; 3027 goto out_parse_done; 3028 } 3029 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos, 3030 slen, dialog_token); 3031 pos += slen; 3032 } 3033 3034 out_parse_done: 3035 #ifdef CONFIG_HS20 3036 hs20_notify_parse_done(wpa_s); 3037 #endif /* CONFIG_HS20 */ 3038 out: 3039 wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s", 3040 MAC2STR(dst), anqp_result); 3041 wpas_notify_anqp_query_done(wpa_s, dst, anqp_result, bss ? bss->anqp : NULL); 3042 } 3043 3044 3045 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s, 3046 struct wpa_scan_results *scan_res) 3047 { 3048 wpa_msg(wpa_s, MSG_DEBUG, 3049 "Interworking: Scan results available - start ANQP fetch"); 3050 interworking_start_fetch_anqp(wpa_s); 3051 } 3052 3053 3054 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select, 3055 int *freqs) 3056 { 3057 interworking_stop_fetch_anqp(wpa_s); 3058 wpa_s->network_select = 1; 3059 wpa_s->auto_network_select = 0; 3060 wpa_s->auto_select = !!auto_select; 3061 wpa_s->fetch_all_anqp = 0; 3062 wpa_s->fetch_osu_info = 0; 3063 wpa_msg(wpa_s, MSG_DEBUG, 3064 "Interworking: Start scan for network selection"); 3065 wpa_s->scan_res_handler = interworking_scan_res_handler; 3066 wpa_s->normal_scans = 0; 3067 wpa_s->scan_req = MANUAL_SCAN_REQ; 3068 os_free(wpa_s->manual_scan_freqs); 3069 wpa_s->manual_scan_freqs = freqs; 3070 wpa_s->after_wps = 0; 3071 wpa_s->known_wps_freq = 0; 3072 wpa_supplicant_req_scan(wpa_s, 0, 0); 3073 3074 return 0; 3075 } 3076 3077 3078 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token, 3079 enum gas_query_result result, 3080 const struct wpabuf *adv_proto, 3081 const struct wpabuf *resp, u16 status_code) 3082 { 3083 struct wpa_supplicant *wpa_s = ctx; 3084 struct wpabuf *n; 3085 3086 wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR 3087 " dialog_token=%d status_code=%d resp_len=%d", 3088 MAC2STR(addr), dialog_token, status_code, 3089 resp ? (int) wpabuf_len(resp) : -1); 3090 if (!resp) 3091 return; 3092 3093 n = wpabuf_dup(resp); 3094 if (n == NULL) 3095 return; 3096 wpabuf_free(wpa_s->prev_gas_resp); 3097 wpa_s->prev_gas_resp = wpa_s->last_gas_resp; 3098 os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN); 3099 wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token; 3100 wpa_s->last_gas_resp = n; 3101 os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN); 3102 wpa_s->last_gas_dialog_token = dialog_token; 3103 } 3104 3105 3106 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst, 3107 const struct wpabuf *adv_proto, 3108 const struct wpabuf *query) 3109 { 3110 struct wpabuf *buf; 3111 int ret = 0; 3112 int freq; 3113 struct wpa_bss *bss; 3114 int res; 3115 size_t len; 3116 u8 query_resp_len_limit = 0; 3117 3118 freq = wpa_s->assoc_freq; 3119 bss = wpa_bss_get_bssid(wpa_s, dst); 3120 if (bss) 3121 freq = bss->freq; 3122 if (freq <= 0) 3123 return -1; 3124 3125 wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)", 3126 MAC2STR(dst), freq); 3127 wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto); 3128 wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query); 3129 3130 len = 3 + wpabuf_len(adv_proto) + 2; 3131 if (query) 3132 len += wpabuf_len(query); 3133 buf = gas_build_initial_req(0, len); 3134 if (buf == NULL) 3135 return -1; 3136 3137 /* Advertisement Protocol IE */ 3138 wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO); 3139 wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */ 3140 wpabuf_put_u8(buf, query_resp_len_limit & 0x7f); 3141 wpabuf_put_buf(buf, adv_proto); 3142 3143 /* GAS Query */ 3144 if (query) { 3145 wpabuf_put_le16(buf, wpabuf_len(query)); 3146 wpabuf_put_buf(buf, query); 3147 } else 3148 wpabuf_put_le16(buf, 0); 3149 3150 res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s); 3151 if (res < 0) { 3152 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request"); 3153 wpabuf_free(buf); 3154 ret = -1; 3155 } else 3156 wpa_msg(wpa_s, MSG_DEBUG, 3157 "GAS: Query started with dialog token %u", res); 3158 3159 return ret; 3160 } 3161
