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 if (wpa_s->wpa_state >= WPA_AUTHENTICATING) { 77 wpa_supplicant_cancel_sched_scan(wpa_s); 78 wpa_supplicant_deauthenticate(wpa_s, 79 WLAN_REASON_DEAUTH_LEAVING); 80 } 81 wpa_s->disconnected = 0; 82 wpa_s->reassociate = 1; 83 84 if (wpa_supplicant_fast_associate(wpa_s) >= 0) 85 return; 86 87 wpa_supplicant_req_scan(wpa_s, 0, 0); 88 } 89 90 91 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids, 92 struct wpabuf *extra) 93 { 94 struct wpabuf *buf; 95 size_t i; 96 u8 *len_pos; 97 98 buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 + 99 (extra ? wpabuf_len(extra) : 0)); 100 if (buf == NULL) 101 return NULL; 102 103 len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST); 104 for (i = 0; i < num_ids; i++) 105 wpabuf_put_le16(buf, info_ids[i]); 106 gas_anqp_set_element_len(buf, len_pos); 107 if (extra) 108 wpabuf_put_buf(buf, extra); 109 110 gas_anqp_set_len(buf); 111 112 return buf; 113 } 114 115 116 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst, 117 u8 dialog_token, 118 enum gas_query_result result, 119 const struct wpabuf *adv_proto, 120 const struct wpabuf *resp, 121 u16 status_code) 122 { 123 struct wpa_supplicant *wpa_s = ctx; 124 125 wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR 126 " dialog_token=%u result=%d status_code=%u", 127 MAC2STR(dst), dialog_token, result, status_code); 128 anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp, 129 status_code); 130 interworking_next_anqp_fetch(wpa_s); 131 } 132 133 134 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s) 135 { 136 struct wpa_cred *cred; 137 138 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 139 if (cred->roaming_consortium_len) 140 return 1; 141 if (cred->required_roaming_consortium_len) 142 return 1; 143 } 144 return 0; 145 } 146 147 148 static int cred_with_3gpp(struct wpa_supplicant *wpa_s) 149 { 150 struct wpa_cred *cred; 151 152 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 153 if (cred->pcsc || cred->imsi) 154 return 1; 155 } 156 return 0; 157 } 158 159 160 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s) 161 { 162 struct wpa_cred *cred; 163 164 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 165 if (cred->pcsc || cred->imsi) 166 continue; 167 if (!cred->eap_method) 168 return 1; 169 if (cred->realm && cred->roaming_consortium_len == 0) 170 return 1; 171 } 172 return 0; 173 } 174 175 176 static int cred_with_domain(struct wpa_supplicant *wpa_s) 177 { 178 struct wpa_cred *cred; 179 180 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 181 if (cred->domain || cred->pcsc || cred->imsi || 182 cred->roaming_partner) 183 return 1; 184 } 185 return 0; 186 } 187 188 189 #ifdef CONFIG_HS20 190 191 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s) 192 { 193 struct wpa_cred *cred; 194 195 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 196 if (cred->min_dl_bandwidth_home || 197 cred->min_ul_bandwidth_home || 198 cred->min_dl_bandwidth_roaming || 199 cred->min_ul_bandwidth_roaming) 200 return 1; 201 } 202 return 0; 203 } 204 205 206 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s) 207 { 208 struct wpa_cred *cred; 209 210 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 211 if (cred->num_req_conn_capab) 212 return 1; 213 } 214 return 0; 215 } 216 217 #endif /* CONFIG_HS20 */ 218 219 220 static int additional_roaming_consortiums(struct wpa_bss *bss) 221 { 222 const u8 *ie; 223 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); 224 if (ie == NULL || ie[1] == 0) 225 return 0; 226 return ie[2]; /* Number of ANQP OIs */ 227 } 228 229 230 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx) 231 { 232 struct wpa_supplicant *wpa_s = eloop_ctx; 233 interworking_next_anqp_fetch(wpa_s); 234 } 235 236 237 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s, 238 struct wpa_bss *bss) 239 { 240 struct wpabuf *buf; 241 int ret = 0; 242 int res; 243 u16 info_ids[8]; 244 size_t num_info_ids = 0; 245 struct wpabuf *extra = NULL; 246 int all = wpa_s->fetch_all_anqp; 247 248 wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR, 249 MAC2STR(bss->bssid)); 250 wpa_s->interworking_gas_bss = bss; 251 252 info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST; 253 if (all) { 254 info_ids[num_info_ids++] = ANQP_VENUE_NAME; 255 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE; 256 } 257 if (all || (cred_with_roaming_consortium(wpa_s) && 258 additional_roaming_consortiums(bss))) 259 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM; 260 if (all) 261 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY; 262 if (all || cred_with_nai_realm(wpa_s)) 263 info_ids[num_info_ids++] = ANQP_NAI_REALM; 264 if (all || cred_with_3gpp(wpa_s)) { 265 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK; 266 wpa_supplicant_scard_init(wpa_s, NULL); 267 } 268 if (all || cred_with_domain(wpa_s)) 269 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME; 270 wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info", 271 (u8 *) info_ids, num_info_ids * 2); 272 273 #ifdef CONFIG_HS20 274 if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) { 275 u8 *len_pos; 276 277 extra = wpabuf_alloc(100); 278 if (!extra) 279 return -1; 280 281 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC); 282 wpabuf_put_be24(extra, OUI_WFA); 283 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE); 284 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST); 285 wpabuf_put_u8(extra, 0); /* Reserved */ 286 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST); 287 if (all) 288 wpabuf_put_u8(extra, 289 HS20_STYPE_OPERATOR_FRIENDLY_NAME); 290 if (all || cred_with_min_backhaul(wpa_s)) 291 wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS); 292 if (all || cred_with_conn_capab(wpa_s)) 293 wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY); 294 if (all) 295 wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS); 296 if (all) 297 wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST); 298 gas_anqp_set_element_len(extra, len_pos); 299 } 300 #endif /* CONFIG_HS20 */ 301 302 buf = anqp_build_req(info_ids, num_info_ids, extra); 303 wpabuf_free(extra); 304 if (buf == NULL) 305 return -1; 306 307 res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf, 308 interworking_anqp_resp_cb, wpa_s); 309 if (res < 0) { 310 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request"); 311 wpabuf_free(buf); 312 ret = -1; 313 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, 314 NULL); 315 } else 316 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token " 317 "%u", res); 318 319 return ret; 320 } 321 322 323 struct nai_realm_eap { 324 u8 method; 325 u8 inner_method; 326 enum nai_realm_eap_auth_inner_non_eap inner_non_eap; 327 u8 cred_type; 328 u8 tunneled_cred_type; 329 }; 330 331 struct nai_realm { 332 u8 encoding; 333 char *realm; 334 u8 eap_count; 335 struct nai_realm_eap *eap; 336 }; 337 338 339 static void nai_realm_free(struct nai_realm *realms, u16 count) 340 { 341 u16 i; 342 343 if (realms == NULL) 344 return; 345 for (i = 0; i < count; i++) { 346 os_free(realms[i].eap); 347 os_free(realms[i].realm); 348 } 349 os_free(realms); 350 } 351 352 353 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos, 354 const u8 *end) 355 { 356 u8 elen, auth_count, a; 357 const u8 *e_end; 358 359 if (pos + 3 > end) { 360 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields"); 361 return NULL; 362 } 363 364 elen = *pos++; 365 if (pos + elen > end || elen < 2) { 366 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield"); 367 return NULL; 368 } 369 e_end = pos + elen; 370 e->method = *pos++; 371 auth_count = *pos++; 372 wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u", 373 elen, e->method, auth_count); 374 375 for (a = 0; a < auth_count; a++) { 376 u8 id, len; 377 378 if (pos + 2 > end || pos + 2 + pos[1] > end) { 379 wpa_printf(MSG_DEBUG, "No room for Authentication " 380 "Parameter subfield"); 381 return NULL; 382 } 383 384 id = *pos++; 385 len = *pos++; 386 387 switch (id) { 388 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH: 389 if (len < 1) 390 break; 391 e->inner_non_eap = *pos; 392 if (e->method != EAP_TYPE_TTLS) 393 break; 394 switch (*pos) { 395 case NAI_REALM_INNER_NON_EAP_PAP: 396 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP"); 397 break; 398 case NAI_REALM_INNER_NON_EAP_CHAP: 399 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP"); 400 break; 401 case NAI_REALM_INNER_NON_EAP_MSCHAP: 402 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP"); 403 break; 404 case NAI_REALM_INNER_NON_EAP_MSCHAPV2: 405 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2"); 406 break; 407 } 408 break; 409 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD: 410 if (len < 1) 411 break; 412 e->inner_method = *pos; 413 wpa_printf(MSG_DEBUG, "Inner EAP method: %u", 414 e->inner_method); 415 break; 416 case NAI_REALM_EAP_AUTH_CRED_TYPE: 417 if (len < 1) 418 break; 419 e->cred_type = *pos; 420 wpa_printf(MSG_DEBUG, "Credential Type: %u", 421 e->cred_type); 422 break; 423 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE: 424 if (len < 1) 425 break; 426 e->tunneled_cred_type = *pos; 427 wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential " 428 "Type: %u", e->tunneled_cred_type); 429 break; 430 default: 431 wpa_printf(MSG_DEBUG, "Unsupported Authentication " 432 "Parameter: id=%u len=%u", id, len); 433 wpa_hexdump(MSG_DEBUG, "Authentication Parameter " 434 "Value", pos, len); 435 break; 436 } 437 438 pos += len; 439 } 440 441 return e_end; 442 } 443 444 445 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos, 446 const u8 *end) 447 { 448 u16 len; 449 const u8 *f_end; 450 u8 realm_len, e; 451 452 if (end - pos < 4) { 453 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data " 454 "fixed fields"); 455 return NULL; 456 } 457 458 len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */ 459 pos += 2; 460 if (pos + len > end || len < 3) { 461 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data " 462 "(len=%u; left=%u)", 463 len, (unsigned int) (end - pos)); 464 return NULL; 465 } 466 f_end = pos + len; 467 468 r->encoding = *pos++; 469 realm_len = *pos++; 470 if (pos + realm_len > f_end) { 471 wpa_printf(MSG_DEBUG, "No room for NAI Realm " 472 "(len=%u; left=%u)", 473 realm_len, (unsigned int) (f_end - pos)); 474 return NULL; 475 } 476 wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len); 477 r->realm = dup_binstr(pos, realm_len); 478 if (r->realm == NULL) 479 return NULL; 480 pos += realm_len; 481 482 if (pos + 1 > f_end) { 483 wpa_printf(MSG_DEBUG, "No room for EAP Method Count"); 484 return NULL; 485 } 486 r->eap_count = *pos++; 487 wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count); 488 if (pos + r->eap_count * 3 > f_end) { 489 wpa_printf(MSG_DEBUG, "No room for EAP Methods"); 490 return NULL; 491 } 492 r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap)); 493 if (r->eap == NULL) 494 return NULL; 495 496 for (e = 0; e < r->eap_count; e++) { 497 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end); 498 if (pos == NULL) 499 return NULL; 500 } 501 502 return f_end; 503 } 504 505 506 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count) 507 { 508 struct nai_realm *realm; 509 const u8 *pos, *end; 510 u16 i, num; 511 512 if (anqp == NULL || wpabuf_len(anqp) < 2) 513 return NULL; 514 515 pos = wpabuf_head_u8(anqp); 516 end = pos + wpabuf_len(anqp); 517 num = WPA_GET_LE16(pos); 518 wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num); 519 pos += 2; 520 521 if (num * 5 > end - pos) { 522 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not " 523 "enough data (%u octets) for that many realms", 524 num, (unsigned int) (end - pos)); 525 return NULL; 526 } 527 528 realm = os_calloc(num, sizeof(struct nai_realm)); 529 if (realm == NULL) 530 return NULL; 531 532 for (i = 0; i < num; i++) { 533 pos = nai_realm_parse_realm(&realm[i], pos, end); 534 if (pos == NULL) { 535 nai_realm_free(realm, num); 536 return NULL; 537 } 538 } 539 540 *count = num; 541 return realm; 542 } 543 544 545 static int nai_realm_match(struct nai_realm *realm, const char *home_realm) 546 { 547 char *tmp, *pos, *end; 548 int match = 0; 549 550 if (realm->realm == NULL || home_realm == NULL) 551 return 0; 552 553 if (os_strchr(realm->realm, ';') == NULL) 554 return os_strcasecmp(realm->realm, home_realm) == 0; 555 556 tmp = os_strdup(realm->realm); 557 if (tmp == NULL) 558 return 0; 559 560 pos = tmp; 561 while (*pos) { 562 end = os_strchr(pos, ';'); 563 if (end) 564 *end = '\0'; 565 if (os_strcasecmp(pos, home_realm) == 0) { 566 match = 1; 567 break; 568 } 569 if (end == NULL) 570 break; 571 pos = end + 1; 572 } 573 574 os_free(tmp); 575 576 return match; 577 } 578 579 580 static int nai_realm_cred_username(struct nai_realm_eap *eap) 581 { 582 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) 583 return 0; /* method not supported */ 584 585 if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP && 586 eap->method != EAP_TYPE_FAST) { 587 /* Only tunneled methods with username/password supported */ 588 return 0; 589 } 590 591 if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) { 592 if (eap->inner_method && 593 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) 594 return 0; 595 if (!eap->inner_method && 596 eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) 597 return 0; 598 } 599 600 if (eap->method == EAP_TYPE_TTLS) { 601 if (eap->inner_method == 0 && eap->inner_non_eap == 0) 602 return 1; /* Assume TTLS/MSCHAPv2 is used */ 603 if (eap->inner_method && 604 eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) 605 return 0; 606 if (eap->inner_non_eap && 607 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP && 608 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP && 609 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP && 610 eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) 611 return 0; 612 } 613 614 if (eap->inner_method && 615 eap->inner_method != EAP_TYPE_GTC && 616 eap->inner_method != EAP_TYPE_MSCHAPV2) 617 return 0; 618 619 return 1; 620 } 621 622 623 static int nai_realm_cred_cert(struct nai_realm_eap *eap) 624 { 625 if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) 626 return 0; /* method not supported */ 627 628 if (eap->method != EAP_TYPE_TLS) { 629 /* Only EAP-TLS supported for credential authentication */ 630 return 0; 631 } 632 633 return 1; 634 } 635 636 637 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred, 638 struct nai_realm *realm) 639 { 640 u8 e; 641 642 if (cred == NULL || 643 cred->username == NULL || 644 cred->username[0] == '\0' || 645 ((cred->password == NULL || 646 cred->password[0] == '\0') && 647 (cred->private_key == NULL || 648 cred->private_key[0] == '\0'))) 649 return NULL; 650 651 for (e = 0; e < realm->eap_count; e++) { 652 struct nai_realm_eap *eap = &realm->eap[e]; 653 if (cred->password && cred->password[0] && 654 nai_realm_cred_username(eap)) 655 return eap; 656 if (cred->private_key && cred->private_key[0] && 657 nai_realm_cred_cert(eap)) 658 return eap; 659 } 660 661 return NULL; 662 } 663 664 665 #ifdef INTERWORKING_3GPP 666 667 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len) 668 { 669 u8 plmn[3], plmn2[3]; 670 const u8 *pos, *end; 671 u8 udhl; 672 673 /* 674 * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network 675 * operator is allowed to include only two digits of the MNC, so allow 676 * matches based on both two and three digit MNC assumptions. Since some 677 * SIM/USIM cards may not expose MNC length conveniently, we may be 678 * provided the default MNC length 3 here and as such, checking with MNC 679 * length 2 is justifiable even though 3GPP TS 24.234 does not mention 680 * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used 681 * with otherwise matching values would not be good idea in general, so 682 * this should not result in selecting incorrect networks. 683 */ 684 /* Match with 3 digit MNC */ 685 plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4); 686 plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4); 687 plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4); 688 /* Match with 2 digit MNC */ 689 plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4); 690 plmn2[1] = (imsi[2] - '0') | 0xf0; 691 plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4); 692 693 if (anqp == NULL) 694 return 0; 695 pos = wpabuf_head_u8(anqp); 696 end = pos + wpabuf_len(anqp); 697 if (pos + 2 > end) 698 return 0; 699 if (*pos != 0) { 700 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos); 701 return 0; 702 } 703 pos++; 704 udhl = *pos++; 705 if (pos + udhl > end) { 706 wpa_printf(MSG_DEBUG, "Invalid UDHL"); 707 return 0; 708 } 709 end = pos + udhl; 710 711 wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)", 712 plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2], 713 imsi, mnc_len); 714 715 while (pos + 2 <= end) { 716 u8 iei, len; 717 const u8 *l_end; 718 iei = *pos++; 719 len = *pos++ & 0x7f; 720 if (pos + len > end) 721 break; 722 l_end = pos + len; 723 724 if (iei == 0 && len > 0) { 725 /* PLMN List */ 726 u8 num, i; 727 wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element", 728 pos, len); 729 num = *pos++; 730 for (i = 0; i < num; i++) { 731 if (pos + 3 > l_end) 732 break; 733 if (os_memcmp(pos, plmn, 3) == 0 || 734 os_memcmp(pos, plmn2, 3) == 0) 735 return 1; /* Found matching PLMN */ 736 pos += 3; 737 } 738 } else { 739 wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element", 740 pos, len); 741 } 742 743 pos = l_end; 744 } 745 746 return 0; 747 } 748 749 750 static int build_root_nai(char *nai, size_t nai_len, const char *imsi, 751 size_t mnc_len, char prefix) 752 { 753 const char *sep, *msin; 754 char *end, *pos; 755 size_t msin_len, plmn_len; 756 757 /* 758 * TS 23.003, Clause 14 (3GPP to WLAN Interworking) 759 * Root NAI: 760 * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org 761 * <MNC> is zero-padded to three digits in case two-digit MNC is used 762 */ 763 764 if (imsi == NULL || os_strlen(imsi) > 16) { 765 wpa_printf(MSG_DEBUG, "No valid IMSI available"); 766 return -1; 767 } 768 sep = os_strchr(imsi, '-'); 769 if (sep) { 770 plmn_len = sep - imsi; 771 msin = sep + 1; 772 } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) { 773 plmn_len = 3 + mnc_len; 774 msin = imsi + plmn_len; 775 } else 776 return -1; 777 if (plmn_len != 5 && plmn_len != 6) 778 return -1; 779 msin_len = os_strlen(msin); 780 781 pos = nai; 782 end = nai + nai_len; 783 if (prefix) 784 *pos++ = prefix; 785 os_memcpy(pos, imsi, plmn_len); 786 pos += plmn_len; 787 os_memcpy(pos, msin, msin_len); 788 pos += msin_len; 789 pos += os_snprintf(pos, end - pos, "@wlan.mnc"); 790 if (plmn_len == 5) { 791 *pos++ = '0'; 792 *pos++ = imsi[3]; 793 *pos++ = imsi[4]; 794 } else { 795 *pos++ = imsi[3]; 796 *pos++ = imsi[4]; 797 *pos++ = imsi[5]; 798 } 799 os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org", 800 imsi[0], imsi[1], imsi[2]); 801 802 return 0; 803 } 804 805 806 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix) 807 { 808 char nai[100]; 809 if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0) 810 return -1; 811 return wpa_config_set_quoted(ssid, "identity", nai); 812 } 813 814 #endif /* INTERWORKING_3GPP */ 815 816 817 static int already_connected(struct wpa_supplicant *wpa_s, 818 struct wpa_cred *cred, struct wpa_bss *bss) 819 { 820 struct wpa_ssid *ssid, *sel_ssid; 821 struct wpa_bss *selected; 822 823 if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL) 824 return 0; 825 826 ssid = wpa_s->current_ssid; 827 if (ssid->parent_cred != cred) 828 return 0; 829 830 if (ssid->ssid_len != bss->ssid_len || 831 os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0) 832 return 0; 833 834 sel_ssid = NULL; 835 selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid); 836 if (selected && sel_ssid && sel_ssid->priority > ssid->priority) 837 return 0; /* higher priority network in scan results */ 838 839 return 1; 840 } 841 842 843 static void remove_duplicate_network(struct wpa_supplicant *wpa_s, 844 struct wpa_cred *cred, 845 struct wpa_bss *bss) 846 { 847 struct wpa_ssid *ssid; 848 849 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 850 if (ssid->parent_cred != cred) 851 continue; 852 if (ssid->ssid_len != bss->ssid_len || 853 os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0) 854 continue; 855 856 break; 857 } 858 859 if (ssid == NULL) 860 return; 861 862 wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential"); 863 864 if (ssid == wpa_s->current_ssid) { 865 wpa_sm_set_config(wpa_s->wpa, NULL); 866 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); 867 wpa_supplicant_deauthenticate(wpa_s, 868 WLAN_REASON_DEAUTH_LEAVING); 869 } 870 871 wpas_notify_network_removed(wpa_s, ssid); 872 wpa_config_remove_network(wpa_s->conf, ssid->id); 873 } 874 875 876 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s, 877 struct wpa_ssid *ssid) 878 { 879 const char *key_mgmt = NULL; 880 #ifdef CONFIG_IEEE80211R 881 int res; 882 struct wpa_driver_capa capa; 883 884 res = wpa_drv_get_capa(wpa_s, &capa); 885 if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) { 886 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ? 887 "WPA-EAP WPA-EAP-SHA256 FT-EAP" : 888 "WPA-EAP FT-EAP"; 889 } 890 #endif /* CONFIG_IEEE80211R */ 891 892 if (!key_mgmt) 893 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ? 894 "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP"; 895 if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0) 896 return -1; 897 if (wpa_config_set(ssid, "proto", "RSN", 0) < 0) 898 return -1; 899 if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0) 900 return -1; 901 return 0; 902 } 903 904 905 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s, 906 struct wpa_cred *cred, 907 struct wpa_bss *bss) 908 { 909 #ifdef INTERWORKING_3GPP 910 struct wpa_ssid *ssid; 911 int eap_type; 912 int res; 913 char prefix; 914 915 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) 916 return -1; 917 918 wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)", 919 MAC2STR(bss->bssid)); 920 921 if (already_connected(wpa_s, cred, bss)) { 922 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, 923 MAC2STR(bss->bssid)); 924 return 0; 925 } 926 927 remove_duplicate_network(wpa_s, cred, bss); 928 929 ssid = wpa_config_add_network(wpa_s->conf); 930 if (ssid == NULL) 931 return -1; 932 ssid->parent_cred = cred; 933 934 wpas_notify_network_added(wpa_s, ssid); 935 wpa_config_set_network_defaults(ssid); 936 ssid->priority = cred->priority; 937 ssid->temporary = 1; 938 ssid->ssid = os_zalloc(bss->ssid_len + 1); 939 if (ssid->ssid == NULL) 940 goto fail; 941 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); 942 ssid->ssid_len = bss->ssid_len; 943 ssid->eap.sim_num = cred->sim_num; 944 945 if (interworking_set_hs20_params(wpa_s, ssid) < 0) 946 goto fail; 947 948 eap_type = EAP_TYPE_SIM; 949 if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard)) 950 eap_type = EAP_TYPE_AKA; 951 if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) { 952 if (cred->eap_method[0].method == EAP_TYPE_SIM || 953 cred->eap_method[0].method == EAP_TYPE_AKA || 954 cred->eap_method[0].method == EAP_TYPE_AKA_PRIME) 955 eap_type = cred->eap_method[0].method; 956 } 957 958 switch (eap_type) { 959 case EAP_TYPE_SIM: 960 prefix = '1'; 961 res = wpa_config_set(ssid, "eap", "SIM", 0); 962 break; 963 case EAP_TYPE_AKA: 964 prefix = '0'; 965 res = wpa_config_set(ssid, "eap", "AKA", 0); 966 break; 967 case EAP_TYPE_AKA_PRIME: 968 prefix = '6'; 969 res = wpa_config_set(ssid, "eap", "AKA'", 0); 970 break; 971 default: 972 res = -1; 973 break; 974 } 975 if (res < 0) { 976 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported", 977 eap_type); 978 goto fail; 979 } 980 981 if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) { 982 wpa_printf(MSG_DEBUG, "Failed to set Root NAI"); 983 goto fail; 984 } 985 986 if (cred->milenage && cred->milenage[0]) { 987 if (wpa_config_set_quoted(ssid, "password", 988 cred->milenage) < 0) 989 goto fail; 990 } else if (cred->pcsc) { 991 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0) 992 goto fail; 993 if (wpa_s->conf->pcsc_pin && 994 wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin) 995 < 0) 996 goto fail; 997 } 998 999 wpa_s->next_ssid = ssid; 1000 wpa_config_update_prio_list(wpa_s->conf); 1001 interworking_reconnect(wpa_s); 1002 1003 return 0; 1004 1005 fail: 1006 wpas_notify_network_removed(wpa_s, ssid); 1007 wpa_config_remove_network(wpa_s->conf, ssid->id); 1008 #endif /* INTERWORKING_3GPP */ 1009 return -1; 1010 } 1011 1012 1013 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id, 1014 size_t rc_len) 1015 { 1016 const u8 *pos, *end; 1017 u8 lens; 1018 1019 if (ie == NULL) 1020 return 0; 1021 1022 pos = ie + 2; 1023 end = ie + 2 + ie[1]; 1024 1025 /* Roaming Consortium element: 1026 * Number of ANQP OIs 1027 * OI #1 and #2 lengths 1028 * OI #1, [OI #2], [OI #3] 1029 */ 1030 1031 if (pos + 2 > end) 1032 return 0; 1033 1034 pos++; /* skip Number of ANQP OIs */ 1035 lens = *pos++; 1036 if (pos + (lens & 0x0f) + (lens >> 4) > end) 1037 return 0; 1038 1039 if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) 1040 return 1; 1041 pos += lens & 0x0f; 1042 1043 if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) 1044 return 1; 1045 pos += lens >> 4; 1046 1047 if (pos < end && (size_t) (end - pos) == rc_len && 1048 os_memcmp(pos, rc_id, rc_len) == 0) 1049 return 1; 1050 1051 return 0; 1052 } 1053 1054 1055 static int roaming_consortium_anqp_match(const struct wpabuf *anqp, 1056 const u8 *rc_id, size_t rc_len) 1057 { 1058 const u8 *pos, *end; 1059 u8 len; 1060 1061 if (anqp == NULL) 1062 return 0; 1063 1064 pos = wpabuf_head(anqp); 1065 end = pos + wpabuf_len(anqp); 1066 1067 /* Set of <OI Length, OI> duples */ 1068 while (pos < end) { 1069 len = *pos++; 1070 if (pos + len > end) 1071 break; 1072 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0) 1073 return 1; 1074 pos += len; 1075 } 1076 1077 return 0; 1078 } 1079 1080 1081 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp, 1082 const u8 *rc_id, size_t rc_len) 1083 { 1084 return roaming_consortium_element_match(ie, rc_id, rc_len) || 1085 roaming_consortium_anqp_match(anqp, rc_id, rc_len); 1086 } 1087 1088 1089 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss) 1090 { 1091 const u8 *ie; 1092 1093 if (cred->required_roaming_consortium_len == 0) 1094 return 0; 1095 1096 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); 1097 1098 if (ie == NULL && 1099 (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL)) 1100 return 1; 1101 1102 return !roaming_consortium_match(ie, 1103 bss->anqp ? 1104 bss->anqp->roaming_consortium : NULL, 1105 cred->required_roaming_consortium, 1106 cred->required_roaming_consortium_len); 1107 } 1108 1109 1110 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss) 1111 { 1112 size_t i; 1113 1114 if (!cred->excluded_ssid) 1115 return 0; 1116 1117 for (i = 0; i < cred->num_excluded_ssid; i++) { 1118 struct excluded_ssid *e = &cred->excluded_ssid[i]; 1119 if (bss->ssid_len == e->ssid_len && 1120 os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0) 1121 return 1; 1122 } 1123 1124 return 0; 1125 } 1126 1127 1128 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s, 1129 struct wpa_cred *cred, struct wpa_bss *bss) 1130 { 1131 int res; 1132 unsigned int dl_bandwidth, ul_bandwidth; 1133 const u8 *wan; 1134 u8 wan_info, dl_load, ul_load; 1135 u16 lmd; 1136 u32 ul_speed, dl_speed; 1137 1138 if (!cred->min_dl_bandwidth_home && 1139 !cred->min_ul_bandwidth_home && 1140 !cred->min_dl_bandwidth_roaming && 1141 !cred->min_ul_bandwidth_roaming) 1142 return 0; /* No bandwidth constraint specified */ 1143 1144 if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL) 1145 return 0; /* No WAN Metrics known - ignore constraint */ 1146 1147 wan = wpabuf_head(bss->anqp->hs20_wan_metrics); 1148 wan_info = wan[0]; 1149 if (wan_info & BIT(3)) 1150 return 1; /* WAN link at capacity */ 1151 lmd = WPA_GET_LE16(wan + 11); 1152 if (lmd == 0) 1153 return 0; /* Downlink/Uplink Load was not measured */ 1154 dl_speed = WPA_GET_LE32(wan + 1); 1155 ul_speed = WPA_GET_LE32(wan + 5); 1156 dl_load = wan[9]; 1157 ul_load = wan[10]; 1158 1159 if (dl_speed >= 0xffffff) 1160 dl_bandwidth = dl_speed / 255 * (255 - dl_load); 1161 else 1162 dl_bandwidth = dl_speed * (255 - dl_load) / 255; 1163 1164 if (ul_speed >= 0xffffff) 1165 ul_bandwidth = ul_speed / 255 * (255 - ul_load); 1166 else 1167 ul_bandwidth = ul_speed * (255 - ul_load) / 255; 1168 1169 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? 1170 bss->anqp->domain_name : NULL); 1171 if (res > 0) { 1172 if (cred->min_dl_bandwidth_home > dl_bandwidth) 1173 return 1; 1174 if (cred->min_ul_bandwidth_home > ul_bandwidth) 1175 return 1; 1176 } else { 1177 if (cred->min_dl_bandwidth_roaming > dl_bandwidth) 1178 return 1; 1179 if (cred->min_ul_bandwidth_roaming > ul_bandwidth) 1180 return 1; 1181 } 1182 1183 return 0; 1184 } 1185 1186 1187 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s, 1188 struct wpa_cred *cred, struct wpa_bss *bss) 1189 { 1190 const u8 *ie; 1191 int res; 1192 1193 if (!cred->max_bss_load) 1194 return 0; /* No BSS Load constraint specified */ 1195 1196 ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD); 1197 if (ie == NULL || ie[1] < 3) 1198 return 0; /* No BSS Load advertised */ 1199 1200 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? 1201 bss->anqp->domain_name : NULL); 1202 if (res <= 0) 1203 return 0; /* Not a home network */ 1204 1205 return ie[4] > cred->max_bss_load; 1206 } 1207 1208 1209 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto) 1210 { 1211 while (pos + 4 <= end) { 1212 if (pos[0] == proto && pos[3] == 1 /* Open */) 1213 return 1; 1214 pos += 4; 1215 } 1216 1217 return 0; 1218 } 1219 1220 1221 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto, 1222 u16 port) 1223 { 1224 while (pos + 4 <= end) { 1225 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port && 1226 pos[3] == 1 /* Open */) 1227 return 1; 1228 pos += 4; 1229 } 1230 1231 return 0; 1232 } 1233 1234 1235 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s, 1236 struct wpa_cred *cred, struct wpa_bss *bss) 1237 { 1238 int res; 1239 const u8 *capab, *end; 1240 unsigned int i, j; 1241 int *ports; 1242 1243 if (!cred->num_req_conn_capab) 1244 return 0; /* No connection capability constraint specified */ 1245 1246 if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL) 1247 return 0; /* No Connection Capability known - ignore constraint 1248 */ 1249 1250 res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? 1251 bss->anqp->domain_name : NULL); 1252 if (res > 0) 1253 return 0; /* No constraint in home network */ 1254 1255 capab = wpabuf_head(bss->anqp->hs20_connection_capability); 1256 end = capab + wpabuf_len(bss->anqp->hs20_connection_capability); 1257 1258 for (i = 0; i < cred->num_req_conn_capab; i++) { 1259 ports = cred->req_conn_capab_port[i]; 1260 if (!ports) { 1261 if (!has_proto_match(capab, end, 1262 cred->req_conn_capab_proto[i])) 1263 return 1; 1264 } else { 1265 for (j = 0; ports[j] > -1; j++) { 1266 if (!has_proto_port_match( 1267 capab, end, 1268 cred->req_conn_capab_proto[i], 1269 ports[j])) 1270 return 1; 1271 } 1272 } 1273 } 1274 1275 return 0; 1276 } 1277 1278 1279 static struct wpa_cred * interworking_credentials_available_roaming_consortium( 1280 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 1281 int *excluded) 1282 { 1283 struct wpa_cred *cred, *selected = NULL; 1284 const u8 *ie; 1285 int is_excluded = 0; 1286 1287 ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); 1288 1289 if (ie == NULL && 1290 (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL)) 1291 return NULL; 1292 1293 if (wpa_s->conf->cred == NULL) 1294 return NULL; 1295 1296 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 1297 if (cred->roaming_consortium_len == 0) 1298 continue; 1299 1300 if (!roaming_consortium_match(ie, 1301 bss->anqp ? 1302 bss->anqp->roaming_consortium : 1303 NULL, 1304 cred->roaming_consortium, 1305 cred->roaming_consortium_len)) 1306 continue; 1307 1308 if (cred_no_required_oi_match(cred, bss)) 1309 continue; 1310 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss)) 1311 continue; 1312 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss)) 1313 continue; 1314 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss)) 1315 continue; 1316 if (cred_excluded_ssid(cred, bss)) { 1317 if (excluded == NULL) 1318 continue; 1319 if (selected == NULL) { 1320 selected = cred; 1321 is_excluded = 1; 1322 } 1323 } else { 1324 if (selected == NULL || is_excluded || 1325 cred_prio_cmp(selected, cred) < 0) { 1326 selected = cred; 1327 is_excluded = 0; 1328 } 1329 } 1330 } 1331 1332 if (excluded) 1333 *excluded = is_excluded; 1334 1335 return selected; 1336 } 1337 1338 1339 static int interworking_set_eap_params(struct wpa_ssid *ssid, 1340 struct wpa_cred *cred, int ttls) 1341 { 1342 if (cred->eap_method) { 1343 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF && 1344 cred->eap_method->method == EAP_TYPE_TTLS; 1345 1346 os_free(ssid->eap.eap_methods); 1347 ssid->eap.eap_methods = 1348 os_malloc(sizeof(struct eap_method_type) * 2); 1349 if (ssid->eap.eap_methods == NULL) 1350 return -1; 1351 os_memcpy(ssid->eap.eap_methods, cred->eap_method, 1352 sizeof(*cred->eap_method)); 1353 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF; 1354 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE; 1355 } 1356 1357 if (ttls && cred->username && cred->username[0]) { 1358 const char *pos; 1359 char *anon; 1360 /* Use anonymous NAI in Phase 1 */ 1361 pos = os_strchr(cred->username, '@'); 1362 if (pos) { 1363 size_t buflen = 9 + os_strlen(pos) + 1; 1364 anon = os_malloc(buflen); 1365 if (anon == NULL) 1366 return -1; 1367 os_snprintf(anon, buflen, "anonymous%s", pos); 1368 } else if (cred->realm) { 1369 size_t buflen = 10 + os_strlen(cred->realm) + 1; 1370 anon = os_malloc(buflen); 1371 if (anon == NULL) 1372 return -1; 1373 os_snprintf(anon, buflen, "anonymous@%s", cred->realm); 1374 } else { 1375 anon = os_strdup("anonymous"); 1376 if (anon == NULL) 1377 return -1; 1378 } 1379 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) < 1380 0) { 1381 os_free(anon); 1382 return -1; 1383 } 1384 os_free(anon); 1385 } 1386 1387 if (cred->username && cred->username[0] && 1388 wpa_config_set_quoted(ssid, "identity", cred->username) < 0) 1389 return -1; 1390 1391 if (cred->password && cred->password[0]) { 1392 if (cred->ext_password && 1393 wpa_config_set(ssid, "password", cred->password, 0) < 0) 1394 return -1; 1395 if (!cred->ext_password && 1396 wpa_config_set_quoted(ssid, "password", cred->password) < 1397 0) 1398 return -1; 1399 } 1400 1401 if (cred->client_cert && cred->client_cert[0] && 1402 wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0) 1403 return -1; 1404 1405 #ifdef ANDROID 1406 if (cred->private_key && 1407 os_strncmp(cred->private_key, "keystore://", 11) == 0) { 1408 /* Use OpenSSL engine configuration for Android keystore */ 1409 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 || 1410 wpa_config_set_quoted(ssid, "key_id", 1411 cred->private_key + 11) < 0 || 1412 wpa_config_set(ssid, "engine", "1", 0) < 0) 1413 return -1; 1414 } else 1415 #endif /* ANDROID */ 1416 if (cred->private_key && cred->private_key[0] && 1417 wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0) 1418 return -1; 1419 1420 if (cred->private_key_passwd && cred->private_key_passwd[0] && 1421 wpa_config_set_quoted(ssid, "private_key_passwd", 1422 cred->private_key_passwd) < 0) 1423 return -1; 1424 1425 if (cred->phase1) { 1426 os_free(ssid->eap.phase1); 1427 ssid->eap.phase1 = os_strdup(cred->phase1); 1428 } 1429 if (cred->phase2) { 1430 os_free(ssid->eap.phase2); 1431 ssid->eap.phase2 = os_strdup(cred->phase2); 1432 } 1433 1434 if (cred->ca_cert && cred->ca_cert[0] && 1435 wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0) 1436 return -1; 1437 1438 if (cred->domain_suffix_match && cred->domain_suffix_match[0] && 1439 wpa_config_set_quoted(ssid, "domain_suffix_match", 1440 cred->domain_suffix_match) < 0) 1441 return -1; 1442 1443 ssid->eap.ocsp = cred->ocsp; 1444 1445 return 0; 1446 } 1447 1448 1449 static int interworking_connect_roaming_consortium( 1450 struct wpa_supplicant *wpa_s, struct wpa_cred *cred, 1451 struct wpa_bss *bss) 1452 { 1453 struct wpa_ssid *ssid; 1454 1455 wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on " 1456 "roaming consortium match", MAC2STR(bss->bssid)); 1457 1458 if (already_connected(wpa_s, cred, bss)) { 1459 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, 1460 MAC2STR(bss->bssid)); 1461 return 0; 1462 } 1463 1464 remove_duplicate_network(wpa_s, cred, bss); 1465 1466 ssid = wpa_config_add_network(wpa_s->conf); 1467 if (ssid == NULL) 1468 return -1; 1469 ssid->parent_cred = cred; 1470 wpas_notify_network_added(wpa_s, ssid); 1471 wpa_config_set_network_defaults(ssid); 1472 ssid->priority = cred->priority; 1473 ssid->temporary = 1; 1474 ssid->ssid = os_zalloc(bss->ssid_len + 1); 1475 if (ssid->ssid == NULL) 1476 goto fail; 1477 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); 1478 ssid->ssid_len = bss->ssid_len; 1479 1480 if (interworking_set_hs20_params(wpa_s, ssid) < 0) 1481 goto fail; 1482 1483 if (cred->eap_method == NULL) { 1484 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for " 1485 "credential using roaming consortium"); 1486 goto fail; 1487 } 1488 1489 if (interworking_set_eap_params( 1490 ssid, cred, 1491 cred->eap_method->vendor == EAP_VENDOR_IETF && 1492 cred->eap_method->method == EAP_TYPE_TTLS) < 0) 1493 goto fail; 1494 1495 wpa_s->next_ssid = ssid; 1496 wpa_config_update_prio_list(wpa_s->conf); 1497 interworking_reconnect(wpa_s); 1498 1499 return 0; 1500 1501 fail: 1502 wpas_notify_network_removed(wpa_s, ssid); 1503 wpa_config_remove_network(wpa_s->conf, ssid->id); 1504 return -1; 1505 } 1506 1507 1508 static int interworking_connect_helper(struct wpa_supplicant *wpa_s, 1509 struct wpa_bss *bss, int allow_excluded) 1510 { 1511 struct wpa_cred *cred, *cred_rc, *cred_3gpp; 1512 struct wpa_ssid *ssid; 1513 struct nai_realm *realm; 1514 struct nai_realm_eap *eap = NULL; 1515 u16 count, i; 1516 char buf[100]; 1517 int excluded = 0, *excl = allow_excluded ? &excluded : NULL; 1518 const char *name; 1519 1520 if (wpa_s->conf->cred == NULL || bss == NULL) 1521 return -1; 1522 if (disallowed_bssid(wpa_s, bss->bssid) || 1523 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { 1524 wpa_printf(MSG_DEBUG, "Interworking: Reject connection to disallowed BSS " 1525 MACSTR, MAC2STR(bss->bssid)); 1526 return -1; 1527 } 1528 1529 wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR 1530 " for connection (allow_excluded=%d)", 1531 MAC2STR(bss->bssid), allow_excluded); 1532 1533 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) { 1534 /* 1535 * We currently support only HS 2.0 networks and those are 1536 * required to use WPA2-Enterprise. 1537 */ 1538 wpa_printf(MSG_DEBUG, "Interworking: Network does not use " 1539 "RSN"); 1540 return -1; 1541 } 1542 1543 cred_rc = interworking_credentials_available_roaming_consortium( 1544 wpa_s, bss, 0, excl); 1545 if (cred_rc) { 1546 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming " 1547 "consortium matching credential priority %d " 1548 "sp_priority %d", 1549 cred_rc->priority, cred_rc->sp_priority); 1550 if (allow_excluded && excl && !(*excl)) 1551 excl = NULL; 1552 } 1553 1554 cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl); 1555 if (cred) { 1556 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list " 1557 "matching credential priority %d sp_priority %d", 1558 cred->priority, cred->sp_priority); 1559 if (allow_excluded && excl && !(*excl)) 1560 excl = NULL; 1561 } 1562 1563 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0, 1564 excl); 1565 if (cred_3gpp) { 1566 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching " 1567 "credential priority %d sp_priority %d", 1568 cred_3gpp->priority, cred_3gpp->sp_priority); 1569 if (allow_excluded && excl && !(*excl)) 1570 excl = NULL; 1571 } 1572 1573 if (!cred_rc && !cred && !cred_3gpp) { 1574 wpa_printf(MSG_DEBUG, "Interworking: No full credential matches - consider options without BW(etc.) limits"); 1575 cred_rc = interworking_credentials_available_roaming_consortium( 1576 wpa_s, bss, 1, excl); 1577 if (cred_rc) { 1578 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming " 1579 "consortium matching credential priority %d " 1580 "sp_priority %d (ignore BW)", 1581 cred_rc->priority, cred_rc->sp_priority); 1582 if (allow_excluded && excl && !(*excl)) 1583 excl = NULL; 1584 } 1585 1586 cred = interworking_credentials_available_realm(wpa_s, bss, 1, 1587 excl); 1588 if (cred) { 1589 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm " 1590 "list matching credential priority %d " 1591 "sp_priority %d (ignore BW)", 1592 cred->priority, cred->sp_priority); 1593 if (allow_excluded && excl && !(*excl)) 1594 excl = NULL; 1595 } 1596 1597 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 1598 1, excl); 1599 if (cred_3gpp) { 1600 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP " 1601 "matching credential priority %d " 1602 "sp_priority %d (ignore BW)", 1603 cred_3gpp->priority, cred_3gpp->sp_priority); 1604 if (allow_excluded && excl && !(*excl)) 1605 excl = NULL; 1606 } 1607 } 1608 1609 if (cred_rc && 1610 (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) && 1611 (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0)) 1612 return interworking_connect_roaming_consortium(wpa_s, cred_rc, 1613 bss); 1614 1615 if (cred_3gpp && 1616 (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) { 1617 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss); 1618 } 1619 1620 if (cred == NULL) { 1621 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials " 1622 "found for " MACSTR, MAC2STR(bss->bssid)); 1623 return -1; 1624 } 1625 1626 realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL, 1627 &count); 1628 if (realm == NULL) { 1629 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI " 1630 "Realm list from " MACSTR, MAC2STR(bss->bssid)); 1631 return -1; 1632 } 1633 1634 for (i = 0; i < count; i++) { 1635 if (!nai_realm_match(&realm[i], cred->realm)) 1636 continue; 1637 eap = nai_realm_find_eap(cred, &realm[i]); 1638 if (eap) 1639 break; 1640 } 1641 1642 if (!eap) { 1643 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials " 1644 "and EAP method found for " MACSTR, 1645 MAC2STR(bss->bssid)); 1646 nai_realm_free(realm, count); 1647 return -1; 1648 } 1649 1650 wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR, 1651 MAC2STR(bss->bssid)); 1652 1653 if (already_connected(wpa_s, cred, bss)) { 1654 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, 1655 MAC2STR(bss->bssid)); 1656 nai_realm_free(realm, count); 1657 return 0; 1658 } 1659 1660 remove_duplicate_network(wpa_s, cred, bss); 1661 1662 ssid = wpa_config_add_network(wpa_s->conf); 1663 if (ssid == NULL) { 1664 nai_realm_free(realm, count); 1665 return -1; 1666 } 1667 ssid->parent_cred = cred; 1668 wpas_notify_network_added(wpa_s, ssid); 1669 wpa_config_set_network_defaults(ssid); 1670 ssid->priority = cred->priority; 1671 ssid->temporary = 1; 1672 ssid->ssid = os_zalloc(bss->ssid_len + 1); 1673 if (ssid->ssid == NULL) 1674 goto fail; 1675 os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); 1676 ssid->ssid_len = bss->ssid_len; 1677 1678 if (interworking_set_hs20_params(wpa_s, ssid) < 0) 1679 goto fail; 1680 1681 if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF, 1682 eap->method), 0) < 0) 1683 goto fail; 1684 1685 switch (eap->method) { 1686 case EAP_TYPE_TTLS: 1687 if (eap->inner_method) { 1688 os_snprintf(buf, sizeof(buf), "\"autheap=%s\"", 1689 eap_get_name(EAP_VENDOR_IETF, 1690 eap->inner_method)); 1691 if (wpa_config_set(ssid, "phase2", buf, 0) < 0) 1692 goto fail; 1693 break; 1694 } 1695 switch (eap->inner_non_eap) { 1696 case NAI_REALM_INNER_NON_EAP_PAP: 1697 if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) < 1698 0) 1699 goto fail; 1700 break; 1701 case NAI_REALM_INNER_NON_EAP_CHAP: 1702 if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0) 1703 < 0) 1704 goto fail; 1705 break; 1706 case NAI_REALM_INNER_NON_EAP_MSCHAP: 1707 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"", 1708 0) < 0) 1709 goto fail; 1710 break; 1711 case NAI_REALM_INNER_NON_EAP_MSCHAPV2: 1712 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"", 1713 0) < 0) 1714 goto fail; 1715 break; 1716 default: 1717 /* EAP params were not set - assume TTLS/MSCHAPv2 */ 1718 if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"", 1719 0) < 0) 1720 goto fail; 1721 break; 1722 } 1723 break; 1724 case EAP_TYPE_PEAP: 1725 case EAP_TYPE_FAST: 1726 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"", 1727 0) < 0) 1728 goto fail; 1729 if (wpa_config_set(ssid, "pac_file", 1730 "\"blob://pac_interworking\"", 0) < 0) 1731 goto fail; 1732 name = eap_get_name(EAP_VENDOR_IETF, 1733 eap->inner_method ? eap->inner_method : 1734 EAP_TYPE_MSCHAPV2); 1735 if (name == NULL) 1736 goto fail; 1737 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name); 1738 if (wpa_config_set(ssid, "phase2", buf, 0) < 0) 1739 goto fail; 1740 break; 1741 case EAP_TYPE_TLS: 1742 break; 1743 } 1744 1745 if (interworking_set_eap_params(ssid, cred, 1746 eap->method == EAP_TYPE_TTLS) < 0) 1747 goto fail; 1748 1749 nai_realm_free(realm, count); 1750 1751 wpa_s->next_ssid = ssid; 1752 wpa_config_update_prio_list(wpa_s->conf); 1753 interworking_reconnect(wpa_s); 1754 1755 return 0; 1756 1757 fail: 1758 wpas_notify_network_removed(wpa_s, ssid); 1759 wpa_config_remove_network(wpa_s->conf, ssid->id); 1760 nai_realm_free(realm, count); 1761 return -1; 1762 } 1763 1764 1765 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) 1766 { 1767 return interworking_connect_helper(wpa_s, bss, 1); 1768 } 1769 1770 1771 #ifdef PCSC_FUNCS 1772 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s) 1773 { 1774 size_t len; 1775 1776 if (wpa_s->imsi[0] && wpa_s->mnc_len) 1777 return 0; 1778 1779 len = sizeof(wpa_s->imsi) - 1; 1780 if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) { 1781 scard_deinit(wpa_s->scard); 1782 wpa_s->scard = NULL; 1783 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI"); 1784 return -1; 1785 } 1786 wpa_s->imsi[len] = '\0'; 1787 wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard); 1788 wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)", 1789 wpa_s->imsi, wpa_s->mnc_len); 1790 1791 return 0; 1792 } 1793 #endif /* PCSC_FUNCS */ 1794 1795 1796 static struct wpa_cred * interworking_credentials_available_3gpp( 1797 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 1798 int *excluded) 1799 { 1800 struct wpa_cred *selected = NULL; 1801 #ifdef INTERWORKING_3GPP 1802 struct wpa_cred *cred; 1803 int ret; 1804 int is_excluded = 0; 1805 1806 if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) 1807 return NULL; 1808 1809 #ifdef CONFIG_EAP_PROXY 1810 if (!wpa_s->imsi[0]) { 1811 size_t len; 1812 wpa_printf(MSG_DEBUG, "Interworking: IMSI not available - try to read again through eap_proxy"); 1813 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol, 1814 wpa_s->imsi, 1815 &len); 1816 if (wpa_s->mnc_len > 0) { 1817 wpa_s->imsi[len] = '\0'; 1818 wpa_printf(MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)", 1819 wpa_s->imsi, wpa_s->mnc_len); 1820 } else { 1821 wpa_printf(MSG_DEBUG, "eap_proxy: IMSI not available"); 1822 } 1823 } 1824 #endif /* CONFIG_EAP_PROXY */ 1825 1826 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 1827 char *sep; 1828 const char *imsi; 1829 int mnc_len; 1830 char imsi_buf[16]; 1831 size_t msin_len; 1832 1833 #ifdef PCSC_FUNCS 1834 if (cred->pcsc && wpa_s->scard) { 1835 if (interworking_pcsc_read_imsi(wpa_s) < 0) 1836 continue; 1837 imsi = wpa_s->imsi; 1838 mnc_len = wpa_s->mnc_len; 1839 goto compare; 1840 } 1841 #endif /* PCSC_FUNCS */ 1842 #ifdef CONFIG_EAP_PROXY 1843 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) { 1844 imsi = wpa_s->imsi; 1845 mnc_len = wpa_s->mnc_len; 1846 goto compare; 1847 } 1848 #endif /* CONFIG_EAP_PROXY */ 1849 1850 if (cred->imsi == NULL || !cred->imsi[0] || 1851 (!wpa_s->conf->external_sim && 1852 (cred->milenage == NULL || !cred->milenage[0]))) 1853 continue; 1854 1855 sep = os_strchr(cred->imsi, '-'); 1856 if (sep == NULL || 1857 (sep - cred->imsi != 5 && sep - cred->imsi != 6)) 1858 continue; 1859 mnc_len = sep - cred->imsi - 3; 1860 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len); 1861 sep++; 1862 msin_len = os_strlen(cred->imsi); 1863 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1) 1864 msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1; 1865 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len); 1866 imsi_buf[3 + mnc_len + msin_len] = '\0'; 1867 imsi = imsi_buf; 1868 1869 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY) 1870 compare: 1871 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */ 1872 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from " 1873 MACSTR, MAC2STR(bss->bssid)); 1874 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len); 1875 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not "); 1876 if (ret) { 1877 if (cred_no_required_oi_match(cred, bss)) 1878 continue; 1879 if (!ignore_bw && 1880 cred_below_min_backhaul(wpa_s, cred, bss)) 1881 continue; 1882 if (!ignore_bw && 1883 cred_over_max_bss_load(wpa_s, cred, bss)) 1884 continue; 1885 if (!ignore_bw && 1886 cred_conn_capab_missing(wpa_s, cred, bss)) 1887 continue; 1888 if (cred_excluded_ssid(cred, bss)) { 1889 if (excluded == NULL) 1890 continue; 1891 if (selected == NULL) { 1892 selected = cred; 1893 is_excluded = 1; 1894 } 1895 } else { 1896 if (selected == NULL || is_excluded || 1897 cred_prio_cmp(selected, cred) < 0) { 1898 selected = cred; 1899 is_excluded = 0; 1900 } 1901 } 1902 } 1903 } 1904 1905 if (excluded) 1906 *excluded = is_excluded; 1907 #endif /* INTERWORKING_3GPP */ 1908 return selected; 1909 } 1910 1911 1912 static struct wpa_cred * interworking_credentials_available_realm( 1913 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 1914 int *excluded) 1915 { 1916 struct wpa_cred *cred, *selected = NULL; 1917 struct nai_realm *realm; 1918 u16 count, i; 1919 int is_excluded = 0; 1920 1921 if (bss->anqp == NULL || bss->anqp->nai_realm == NULL) 1922 return NULL; 1923 1924 if (wpa_s->conf->cred == NULL) 1925 return NULL; 1926 1927 wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from " 1928 MACSTR, MAC2STR(bss->bssid)); 1929 realm = nai_realm_parse(bss->anqp->nai_realm, &count); 1930 if (realm == NULL) { 1931 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI " 1932 "Realm list from " MACSTR, MAC2STR(bss->bssid)); 1933 return NULL; 1934 } 1935 1936 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 1937 if (cred->realm == NULL) 1938 continue; 1939 1940 for (i = 0; i < count; i++) { 1941 if (!nai_realm_match(&realm[i], cred->realm)) 1942 continue; 1943 if (nai_realm_find_eap(cred, &realm[i])) { 1944 if (cred_no_required_oi_match(cred, bss)) 1945 continue; 1946 if (!ignore_bw && 1947 cred_below_min_backhaul(wpa_s, cred, bss)) 1948 continue; 1949 if (!ignore_bw && 1950 cred_over_max_bss_load(wpa_s, cred, bss)) 1951 continue; 1952 if (!ignore_bw && 1953 cred_conn_capab_missing(wpa_s, cred, bss)) 1954 continue; 1955 if (cred_excluded_ssid(cred, bss)) { 1956 if (excluded == NULL) 1957 continue; 1958 if (selected == NULL) { 1959 selected = cred; 1960 is_excluded = 1; 1961 } 1962 } else { 1963 if (selected == NULL || is_excluded || 1964 cred_prio_cmp(selected, cred) < 0) 1965 { 1966 selected = cred; 1967 is_excluded = 0; 1968 } 1969 } 1970 break; 1971 } 1972 } 1973 } 1974 1975 nai_realm_free(realm, count); 1976 1977 if (excluded) 1978 *excluded = is_excluded; 1979 1980 return selected; 1981 } 1982 1983 1984 static struct wpa_cred * interworking_credentials_available_helper( 1985 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, 1986 int *excluded) 1987 { 1988 struct wpa_cred *cred, *cred2; 1989 int excluded1, excluded2; 1990 1991 if (disallowed_bssid(wpa_s, bss->bssid) || 1992 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { 1993 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS " 1994 MACSTR, MAC2STR(bss->bssid)); 1995 return NULL; 1996 } 1997 1998 cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw, 1999 &excluded1); 2000 cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw, 2001 &excluded2); 2002 if (cred && cred2 && 2003 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) { 2004 cred = cred2; 2005 excluded1 = excluded2; 2006 } 2007 if (!cred) { 2008 cred = cred2; 2009 excluded1 = excluded2; 2010 } 2011 2012 cred2 = interworking_credentials_available_roaming_consortium( 2013 wpa_s, bss, ignore_bw, &excluded2); 2014 if (cred && cred2 && 2015 (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) { 2016 cred = cred2; 2017 excluded1 = excluded2; 2018 } 2019 if (!cred) { 2020 cred = cred2; 2021 excluded1 = excluded2; 2022 } 2023 2024 if (excluded) 2025 *excluded = excluded1; 2026 return cred; 2027 } 2028 2029 2030 static struct wpa_cred * interworking_credentials_available( 2031 struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded) 2032 { 2033 struct wpa_cred *cred; 2034 2035 if (excluded) 2036 *excluded = 0; 2037 cred = interworking_credentials_available_helper(wpa_s, bss, 0, 2038 excluded); 2039 if (cred) 2040 return cred; 2041 return interworking_credentials_available_helper(wpa_s, bss, 1, 2042 excluded); 2043 } 2044 2045 2046 int domain_name_list_contains(struct wpabuf *domain_names, 2047 const char *domain, int exact_match) 2048 { 2049 const u8 *pos, *end; 2050 size_t len; 2051 2052 len = os_strlen(domain); 2053 pos = wpabuf_head(domain_names); 2054 end = pos + wpabuf_len(domain_names); 2055 2056 while (pos + 1 < end) { 2057 if (pos + 1 + pos[0] > end) 2058 break; 2059 2060 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name", 2061 pos + 1, pos[0]); 2062 if (pos[0] == len && 2063 os_strncasecmp(domain, (const char *) (pos + 1), len) == 0) 2064 return 1; 2065 if (!exact_match && pos[0] > len && pos[pos[0] - len] == '.') { 2066 const char *ap = (const char *) (pos + 1); 2067 int offset = pos[0] - len; 2068 if (os_strncasecmp(domain, ap + offset, len) == 0) 2069 return 1; 2070 } 2071 2072 pos += 1 + pos[0]; 2073 } 2074 2075 return 0; 2076 } 2077 2078 2079 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s, 2080 struct wpa_cred *cred, 2081 struct wpabuf *domain_names) 2082 { 2083 size_t i; 2084 int ret = -1; 2085 #ifdef INTERWORKING_3GPP 2086 char nai[100], *realm; 2087 2088 char *imsi = NULL; 2089 int mnc_len = 0; 2090 if (cred->imsi) 2091 imsi = cred->imsi; 2092 #ifdef PCSC_FUNCS 2093 else if (cred->pcsc && wpa_s->scard) { 2094 if (interworking_pcsc_read_imsi(wpa_s) < 0) 2095 return -1; 2096 imsi = wpa_s->imsi; 2097 mnc_len = wpa_s->mnc_len; 2098 } 2099 #endif /* PCSC_FUNCS */ 2100 #ifdef CONFIG_EAP_PROXY 2101 else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) { 2102 imsi = wpa_s->imsi; 2103 mnc_len = wpa_s->mnc_len; 2104 } 2105 #endif /* CONFIG_EAP_PROXY */ 2106 if (domain_names && 2107 imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) { 2108 realm = os_strchr(nai, '@'); 2109 if (realm) 2110 realm++; 2111 wpa_printf(MSG_DEBUG, "Interworking: Search for match " 2112 "with SIM/USIM domain %s", realm); 2113 if (realm && 2114 domain_name_list_contains(domain_names, realm, 1)) 2115 return 1; 2116 if (realm) 2117 ret = 0; 2118 } 2119 #endif /* INTERWORKING_3GPP */ 2120 2121 if (domain_names == NULL || cred->domain == NULL) 2122 return ret; 2123 2124 for (i = 0; i < cred->num_domain; i++) { 2125 wpa_printf(MSG_DEBUG, "Interworking: Search for match with " 2126 "home SP FQDN %s", cred->domain[i]); 2127 if (domain_name_list_contains(domain_names, cred->domain[i], 1)) 2128 return 1; 2129 } 2130 2131 return 0; 2132 } 2133 2134 2135 static int interworking_home_sp(struct wpa_supplicant *wpa_s, 2136 struct wpabuf *domain_names) 2137 { 2138 struct wpa_cred *cred; 2139 2140 if (domain_names == NULL || wpa_s->conf->cred == NULL) 2141 return -1; 2142 2143 for (cred = wpa_s->conf->cred; cred; cred = cred->next) { 2144 int res = interworking_home_sp_cred(wpa_s, cred, domain_names); 2145 if (res) 2146 return res; 2147 } 2148 2149 return 0; 2150 } 2151 2152 2153 static int interworking_find_network_match(struct wpa_supplicant *wpa_s) 2154 { 2155 struct wpa_bss *bss; 2156 struct wpa_ssid *ssid; 2157 2158 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2159 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 2160 if (wpas_network_disabled(wpa_s, ssid) || 2161 ssid->mode != WPAS_MODE_INFRA) 2162 continue; 2163 if (ssid->ssid_len != bss->ssid_len || 2164 os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) != 2165 0) 2166 continue; 2167 /* 2168 * TODO: Consider more accurate matching of security 2169 * configuration similarly to what is done in events.c 2170 */ 2171 return 1; 2172 } 2173 } 2174 2175 return 0; 2176 } 2177 2178 2179 static int roaming_partner_match(struct wpa_supplicant *wpa_s, 2180 struct roaming_partner *partner, 2181 struct wpabuf *domain_names) 2182 { 2183 wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'", 2184 partner->fqdn, partner->exact_match, partner->priority, 2185 partner->country); 2186 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names", 2187 wpabuf_head(domain_names), 2188 wpabuf_len(domain_names)); 2189 if (!domain_name_list_contains(domain_names, partner->fqdn, 2190 partner->exact_match)) 2191 return 0; 2192 /* TODO: match Country */ 2193 return 1; 2194 } 2195 2196 2197 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, 2198 struct wpa_bss *bss) 2199 { 2200 size_t i; 2201 2202 if (bss->anqp == NULL || bss->anqp->domain_name == NULL) { 2203 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128"); 2204 return 128; /* cannot check preference with domain name */ 2205 } 2206 2207 if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0) 2208 { 2209 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority"); 2210 return 0; /* max preference for home SP network */ 2211 } 2212 2213 for (i = 0; i < cred->num_roaming_partner; i++) { 2214 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i], 2215 bss->anqp->domain_name)) { 2216 wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u", 2217 cred->roaming_partner[i].priority); 2218 return cred->roaming_partner[i].priority; 2219 } 2220 } 2221 2222 wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128"); 2223 return 128; 2224 } 2225 2226 2227 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s, 2228 struct wpa_bss *selected, 2229 struct wpa_cred *cred) 2230 { 2231 struct wpa_bss *bss; 2232 u8 best_prio, prio; 2233 struct wpa_cred *cred2; 2234 2235 /* 2236 * Check if any other BSS is operated by a more preferred roaming 2237 * partner. 2238 */ 2239 2240 best_prio = roaming_prio(wpa_s, cred, selected); 2241 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS " 2242 MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid), 2243 cred->id); 2244 2245 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2246 if (bss == selected) 2247 continue; 2248 cred2 = interworking_credentials_available(wpa_s, bss, NULL); 2249 if (!cred2) 2250 continue; 2251 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) 2252 continue; 2253 prio = roaming_prio(wpa_s, cred2, bss); 2254 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS " 2255 MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid), 2256 cred2->id); 2257 if (prio < best_prio) { 2258 int bh1, bh2, load1, load2, conn1, conn2; 2259 bh1 = cred_below_min_backhaul(wpa_s, cred, selected); 2260 load1 = cred_over_max_bss_load(wpa_s, cred, selected); 2261 conn1 = cred_conn_capab_missing(wpa_s, cred, selected); 2262 bh2 = cred_below_min_backhaul(wpa_s, cred2, bss); 2263 load2 = cred_over_max_bss_load(wpa_s, cred2, bss); 2264 conn2 = cred_conn_capab_missing(wpa_s, cred2, bss); 2265 wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d", 2266 bh1, load1, conn1, bh2, load2, conn2); 2267 if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) { 2268 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid)); 2269 best_prio = prio; 2270 selected = bss; 2271 } 2272 } 2273 } 2274 2275 return selected; 2276 } 2277 2278 2279 static void interworking_select_network(struct wpa_supplicant *wpa_s) 2280 { 2281 struct wpa_bss *bss, *selected = NULL, *selected_home = NULL; 2282 struct wpa_bss *selected2 = NULL, *selected2_home = NULL; 2283 unsigned int count = 0; 2284 const char *type; 2285 int res; 2286 struct wpa_cred *cred, *selected_cred = NULL; 2287 struct wpa_cred *selected_home_cred = NULL; 2288 struct wpa_cred *selected2_cred = NULL; 2289 struct wpa_cred *selected2_home_cred = NULL; 2290 2291 wpa_s->network_select = 0; 2292 2293 wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)", 2294 wpa_s->auto_select); 2295 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2296 int excluded = 0; 2297 int bh, bss_load, conn_capab; 2298 cred = interworking_credentials_available(wpa_s, bss, 2299 &excluded); 2300 if (!cred) 2301 continue; 2302 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) { 2303 /* 2304 * We currently support only HS 2.0 networks and those 2305 * are required to use WPA2-Enterprise. 2306 */ 2307 wpa_printf(MSG_DEBUG, "Interworking: Credential match " 2308 "with " MACSTR " but network does not use " 2309 "RSN", MAC2STR(bss->bssid)); 2310 continue; 2311 } 2312 if (!excluded) 2313 count++; 2314 res = interworking_home_sp(wpa_s, bss->anqp ? 2315 bss->anqp->domain_name : NULL); 2316 if (res > 0) 2317 type = "home"; 2318 else if (res == 0) 2319 type = "roaming"; 2320 else 2321 type = "unknown"; 2322 bh = cred_below_min_backhaul(wpa_s, cred, bss); 2323 bss_load = cred_over_max_bss_load(wpa_s, cred, bss); 2324 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss); 2325 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d", 2326 excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP, 2327 MAC2STR(bss->bssid), type, 2328 bh ? " below_min_backhaul=1" : "", 2329 bss_load ? " over_max_bss_load=1" : "", 2330 conn_capab ? " conn_capab_missing=1" : "", 2331 cred->id, cred->priority, cred->sp_priority); 2332 if (excluded) 2333 continue; 2334 if (wpa_s->auto_select || 2335 (wpa_s->conf->auto_interworking && 2336 wpa_s->auto_network_select)) { 2337 if (bh || bss_load || conn_capab) { 2338 if (selected2_cred == NULL || 2339 cred_prio_cmp(cred, selected2_cred) > 0) { 2340 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2"); 2341 selected2 = bss; 2342 selected2_cred = cred; 2343 } 2344 if (res > 0 && 2345 (selected2_home_cred == NULL || 2346 cred_prio_cmp(cred, selected2_home_cred) > 2347 0)) { 2348 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home"); 2349 selected2_home = bss; 2350 selected2_home_cred = cred; 2351 } 2352 } else { 2353 if (selected_cred == NULL || 2354 cred_prio_cmp(cred, selected_cred) > 0) { 2355 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected"); 2356 selected = bss; 2357 selected_cred = cred; 2358 } 2359 if (res > 0 && 2360 (selected_home_cred == NULL || 2361 cred_prio_cmp(cred, selected_home_cred) > 2362 0)) { 2363 wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home"); 2364 selected_home = bss; 2365 selected_home_cred = cred; 2366 } 2367 } 2368 } 2369 } 2370 2371 if (selected_home && selected_home != selected && 2372 selected_home_cred && 2373 (selected_cred == NULL || 2374 cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) { 2375 /* Prefer network operated by the Home SP */ 2376 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home"); 2377 selected = selected_home; 2378 selected_cred = selected_home_cred; 2379 } 2380 2381 if (!selected) { 2382 if (selected2_home) { 2383 wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected"); 2384 selected = selected2_home; 2385 selected_cred = selected2_home_cred; 2386 } else if (selected2) { 2387 wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected"); 2388 selected = selected2; 2389 selected_cred = selected2_cred; 2390 } 2391 } 2392 2393 if (count == 0) { 2394 /* 2395 * No matching network was found based on configured 2396 * credentials. Check whether any of the enabled network blocks 2397 * have matching APs. 2398 */ 2399 if (interworking_find_network_match(wpa_s)) { 2400 wpa_printf(MSG_DEBUG, "Interworking: Possible BSS " 2401 "match for enabled network configurations"); 2402 if (wpa_s->auto_select) { 2403 interworking_reconnect(wpa_s); 2404 return; 2405 } 2406 } 2407 2408 if (wpa_s->auto_network_select) { 2409 wpa_printf(MSG_DEBUG, "Interworking: Continue " 2410 "scanning after ANQP fetch"); 2411 wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 2412 0); 2413 return; 2414 } 2415 2416 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network " 2417 "with matching credentials found"); 2418 } 2419 2420 if (selected) { 2421 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR, 2422 MAC2STR(selected->bssid)); 2423 selected = pick_best_roaming_partner(wpa_s, selected, 2424 selected_cred); 2425 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR 2426 " (after best roaming partner selection)", 2427 MAC2STR(selected->bssid)); 2428 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR, 2429 MAC2STR(selected->bssid)); 2430 interworking_connect(wpa_s, selected); 2431 } 2432 } 2433 2434 2435 static struct wpa_bss_anqp * 2436 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) 2437 { 2438 struct wpa_bss *other; 2439 2440 if (is_zero_ether_addr(bss->hessid)) 2441 return NULL; /* Cannot be in the same homegenous ESS */ 2442 2443 dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) { 2444 if (other == bss) 2445 continue; 2446 if (other->anqp == NULL) 2447 continue; 2448 if (other->anqp->roaming_consortium == NULL && 2449 other->anqp->nai_realm == NULL && 2450 other->anqp->anqp_3gpp == NULL && 2451 other->anqp->domain_name == NULL) 2452 continue; 2453 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED)) 2454 continue; 2455 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0) 2456 continue; 2457 if (bss->ssid_len != other->ssid_len || 2458 os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0) 2459 continue; 2460 2461 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with " 2462 "already fetched BSSID " MACSTR " and " MACSTR, 2463 MAC2STR(other->bssid), MAC2STR(bss->bssid)); 2464 other->anqp->users++; 2465 return other->anqp; 2466 } 2467 2468 return NULL; 2469 } 2470 2471 2472 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s) 2473 { 2474 struct wpa_bss *bss; 2475 int found = 0; 2476 const u8 *ie; 2477 2478 wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - " 2479 "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d", 2480 wpa_s->fetch_anqp_in_progress, 2481 wpa_s->fetch_osu_icon_in_progress); 2482 2483 if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) { 2484 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch"); 2485 return; 2486 } 2487 2488 if (wpa_s->fetch_osu_icon_in_progress) { 2489 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)"); 2490 hs20_next_osu_icon(wpa_s); 2491 return; 2492 } 2493 2494 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2495 if (!(bss->caps & IEEE80211_CAP_ESS)) 2496 continue; 2497 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB); 2498 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80)) 2499 continue; /* AP does not support Interworking */ 2500 if (disallowed_bssid(wpa_s, bss->bssid) || 2501 disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) 2502 continue; /* Disallowed BSS */ 2503 2504 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) { 2505 if (bss->anqp == NULL) { 2506 bss->anqp = interworking_match_anqp_info(wpa_s, 2507 bss); 2508 if (bss->anqp) { 2509 /* Shared data already fetched */ 2510 continue; 2511 } 2512 bss->anqp = wpa_bss_anqp_alloc(); 2513 if (bss->anqp == NULL) 2514 break; 2515 } 2516 found++; 2517 bss->flags |= WPA_BSS_ANQP_FETCH_TRIED; 2518 wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for " 2519 MACSTR, MAC2STR(bss->bssid)); 2520 interworking_anqp_send_req(wpa_s, bss); 2521 break; 2522 } 2523 } 2524 2525 if (found == 0) { 2526 if (wpa_s->fetch_osu_info) { 2527 if (wpa_s->num_prov_found == 0 && 2528 wpa_s->num_osu_scans < 3) { 2529 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again"); 2530 hs20_start_osu_scan(wpa_s); 2531 return; 2532 } 2533 wpa_printf(MSG_DEBUG, "Interworking: Next icon"); 2534 hs20_osu_icon_fetch(wpa_s); 2535 return; 2536 } 2537 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed"); 2538 wpa_s->fetch_anqp_in_progress = 0; 2539 if (wpa_s->network_select) 2540 interworking_select_network(wpa_s); 2541 } 2542 } 2543 2544 2545 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s) 2546 { 2547 struct wpa_bss *bss; 2548 2549 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) 2550 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED; 2551 2552 wpa_s->fetch_anqp_in_progress = 1; 2553 interworking_next_anqp_fetch(wpa_s); 2554 } 2555 2556 2557 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s) 2558 { 2559 if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select) 2560 return 0; 2561 2562 wpa_s->network_select = 0; 2563 wpa_s->fetch_all_anqp = 1; 2564 wpa_s->fetch_osu_info = 0; 2565 2566 interworking_start_fetch_anqp(wpa_s); 2567 2568 return 0; 2569 } 2570 2571 2572 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s) 2573 { 2574 if (!wpa_s->fetch_anqp_in_progress) 2575 return; 2576 2577 wpa_s->fetch_anqp_in_progress = 0; 2578 } 2579 2580 2581 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, 2582 u16 info_ids[], size_t num_ids, u32 subtypes) 2583 { 2584 struct wpabuf *buf; 2585 struct wpabuf *hs20_buf = NULL; 2586 int ret = 0; 2587 int freq; 2588 struct wpa_bss *bss; 2589 int res; 2590 2591 freq = wpa_s->assoc_freq; 2592 bss = wpa_bss_get_bssid(wpa_s, dst); 2593 if (bss) { 2594 wpa_bss_anqp_unshare_alloc(bss); 2595 freq = bss->freq; 2596 } 2597 if (freq <= 0) 2598 return -1; 2599 2600 wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)", 2601 MAC2STR(dst), (unsigned int) num_ids); 2602 2603 #ifdef CONFIG_HS20 2604 if (subtypes != 0) { 2605 hs20_buf = wpabuf_alloc(100); 2606 if (hs20_buf == NULL) 2607 return -1; 2608 hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf); 2609 } 2610 #endif /* CONFIG_HS20 */ 2611 2612 buf = anqp_build_req(info_ids, num_ids, hs20_buf); 2613 wpabuf_free(hs20_buf); 2614 if (buf == NULL) 2615 return -1; 2616 2617 res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s); 2618 if (res < 0) { 2619 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request"); 2620 wpabuf_free(buf); 2621 ret = -1; 2622 } else 2623 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token " 2624 "%u", res); 2625 2626 return ret; 2627 } 2628 2629 2630 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s, 2631 struct wpa_bss *bss, const u8 *sa, 2632 u16 info_id, 2633 const u8 *data, size_t slen) 2634 { 2635 const u8 *pos = data; 2636 struct wpa_bss_anqp *anqp = NULL; 2637 #ifdef CONFIG_HS20 2638 u8 type; 2639 #endif /* CONFIG_HS20 */ 2640 2641 if (bss) 2642 anqp = bss->anqp; 2643 2644 switch (info_id) { 2645 case ANQP_CAPABILITY_LIST: 2646 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR 2647 " ANQP Capability list", MAC2STR(sa)); 2648 break; 2649 case ANQP_VENUE_NAME: 2650 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR 2651 " Venue Name", MAC2STR(sa)); 2652 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen); 2653 if (anqp) { 2654 wpabuf_free(anqp->venue_name); 2655 anqp->venue_name = wpabuf_alloc_copy(pos, slen); 2656 } 2657 break; 2658 case ANQP_NETWORK_AUTH_TYPE: 2659 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR 2660 " Network Authentication Type information", 2661 MAC2STR(sa)); 2662 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication " 2663 "Type", pos, slen); 2664 if (anqp) { 2665 wpabuf_free(anqp->network_auth_type); 2666 anqp->network_auth_type = wpabuf_alloc_copy(pos, slen); 2667 } 2668 break; 2669 case ANQP_ROAMING_CONSORTIUM: 2670 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR 2671 " Roaming Consortium list", MAC2STR(sa)); 2672 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium", 2673 pos, slen); 2674 if (anqp) { 2675 wpabuf_free(anqp->roaming_consortium); 2676 anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen); 2677 } 2678 break; 2679 case ANQP_IP_ADDR_TYPE_AVAILABILITY: 2680 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR 2681 " IP Address Type Availability information", 2682 MAC2STR(sa)); 2683 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability", 2684 pos, slen); 2685 if (anqp) { 2686 wpabuf_free(anqp->ip_addr_type_availability); 2687 anqp->ip_addr_type_availability = 2688 wpabuf_alloc_copy(pos, slen); 2689 } 2690 break; 2691 case ANQP_NAI_REALM: 2692 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR 2693 " NAI Realm list", MAC2STR(sa)); 2694 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen); 2695 if (anqp) { 2696 wpabuf_free(anqp->nai_realm); 2697 anqp->nai_realm = wpabuf_alloc_copy(pos, slen); 2698 } 2699 break; 2700 case ANQP_3GPP_CELLULAR_NETWORK: 2701 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR 2702 " 3GPP Cellular Network information", MAC2STR(sa)); 2703 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network", 2704 pos, slen); 2705 if (anqp) { 2706 wpabuf_free(anqp->anqp_3gpp); 2707 anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen); 2708 } 2709 break; 2710 case ANQP_DOMAIN_NAME: 2711 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR 2712 " Domain Name list", MAC2STR(sa)); 2713 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen); 2714 if (anqp) { 2715 wpabuf_free(anqp->domain_name); 2716 anqp->domain_name = wpabuf_alloc_copy(pos, slen); 2717 } 2718 break; 2719 case ANQP_VENDOR_SPECIFIC: 2720 if (slen < 3) 2721 return; 2722 2723 switch (WPA_GET_BE24(pos)) { 2724 #ifdef CONFIG_HS20 2725 case OUI_WFA: 2726 pos += 3; 2727 slen -= 3; 2728 2729 if (slen < 1) 2730 return; 2731 type = *pos++; 2732 slen--; 2733 2734 switch (type) { 2735 case HS20_ANQP_OUI_TYPE: 2736 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos, 2737 slen); 2738 break; 2739 default: 2740 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP " 2741 "vendor type %u", type); 2742 break; 2743 } 2744 break; 2745 #endif /* CONFIG_HS20 */ 2746 default: 2747 wpa_printf(MSG_DEBUG, "Interworking: Unsupported " 2748 "vendor-specific ANQP OUI %06x", 2749 WPA_GET_BE24(pos)); 2750 return; 2751 } 2752 break; 2753 default: 2754 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID " 2755 "%u", info_id); 2756 break; 2757 } 2758 } 2759 2760 2761 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token, 2762 enum gas_query_result result, 2763 const struct wpabuf *adv_proto, 2764 const struct wpabuf *resp, u16 status_code) 2765 { 2766 struct wpa_supplicant *wpa_s = ctx; 2767 const u8 *pos; 2768 const u8 *end; 2769 u16 info_id; 2770 u16 slen; 2771 struct wpa_bss *bss = NULL, *tmp; 2772 2773 wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR 2774 " dialog_token=%u result=%d status_code=%u", 2775 MAC2STR(dst), dialog_token, result, status_code); 2776 if (result != GAS_QUERY_SUCCESS) { 2777 if (wpa_s->fetch_osu_icon_in_progress) 2778 hs20_icon_fetch_failed(wpa_s); 2779 return; 2780 } 2781 2782 pos = wpabuf_head(adv_proto); 2783 if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO || 2784 pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) { 2785 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement " 2786 "Protocol in response"); 2787 if (wpa_s->fetch_osu_icon_in_progress) 2788 hs20_icon_fetch_failed(wpa_s); 2789 return; 2790 } 2791 2792 /* 2793 * If possible, select the BSS entry based on which BSS entry was used 2794 * for the request. This can help in cases where multiple BSS entries 2795 * may exist for the same AP. 2796 */ 2797 dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) { 2798 if (tmp == wpa_s->interworking_gas_bss && 2799 os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) { 2800 bss = tmp; 2801 break; 2802 } 2803 } 2804 if (bss == NULL) 2805 bss = wpa_bss_get_bssid(wpa_s, dst); 2806 2807 pos = wpabuf_head(resp); 2808 end = pos + wpabuf_len(resp); 2809 2810 while (pos < end) { 2811 if (pos + 4 > end) { 2812 wpa_printf(MSG_DEBUG, "ANQP: Invalid element"); 2813 break; 2814 } 2815 info_id = WPA_GET_LE16(pos); 2816 pos += 2; 2817 slen = WPA_GET_LE16(pos); 2818 pos += 2; 2819 if (pos + slen > end) { 2820 wpa_printf(MSG_DEBUG, "ANQP: Invalid element length " 2821 "for Info ID %u", info_id); 2822 break; 2823 } 2824 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos, 2825 slen); 2826 pos += slen; 2827 } 2828 2829 hs20_notify_parse_done(wpa_s); 2830 } 2831 2832 2833 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s, 2834 struct wpa_scan_results *scan_res) 2835 { 2836 wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start " 2837 "ANQP fetch"); 2838 interworking_start_fetch_anqp(wpa_s); 2839 } 2840 2841 2842 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select, 2843 int *freqs) 2844 { 2845 interworking_stop_fetch_anqp(wpa_s); 2846 wpa_s->network_select = 1; 2847 wpa_s->auto_network_select = 0; 2848 wpa_s->auto_select = !!auto_select; 2849 wpa_s->fetch_all_anqp = 0; 2850 wpa_s->fetch_osu_info = 0; 2851 wpa_printf(MSG_DEBUG, "Interworking: Start scan for network " 2852 "selection"); 2853 wpa_s->scan_res_handler = interworking_scan_res_handler; 2854 wpa_s->normal_scans = 0; 2855 wpa_s->scan_req = MANUAL_SCAN_REQ; 2856 os_free(wpa_s->manual_scan_freqs); 2857 wpa_s->manual_scan_freqs = freqs; 2858 wpa_s->after_wps = 0; 2859 wpa_s->known_wps_freq = 0; 2860 wpa_supplicant_req_scan(wpa_s, 0, 0); 2861 2862 return 0; 2863 } 2864 2865 2866 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token, 2867 enum gas_query_result result, 2868 const struct wpabuf *adv_proto, 2869 const struct wpabuf *resp, u16 status_code) 2870 { 2871 struct wpa_supplicant *wpa_s = ctx; 2872 struct wpabuf *n; 2873 2874 wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR 2875 " dialog_token=%d status_code=%d resp_len=%d", 2876 MAC2STR(addr), dialog_token, status_code, 2877 resp ? (int) wpabuf_len(resp) : -1); 2878 if (!resp) 2879 return; 2880 2881 n = wpabuf_dup(resp); 2882 if (n == NULL) 2883 return; 2884 wpabuf_free(wpa_s->prev_gas_resp); 2885 wpa_s->prev_gas_resp = wpa_s->last_gas_resp; 2886 os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN); 2887 wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token; 2888 wpa_s->last_gas_resp = n; 2889 os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN); 2890 wpa_s->last_gas_dialog_token = dialog_token; 2891 } 2892 2893 2894 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst, 2895 const struct wpabuf *adv_proto, 2896 const struct wpabuf *query) 2897 { 2898 struct wpabuf *buf; 2899 int ret = 0; 2900 int freq; 2901 struct wpa_bss *bss; 2902 int res; 2903 size_t len; 2904 u8 query_resp_len_limit = 0; 2905 2906 freq = wpa_s->assoc_freq; 2907 bss = wpa_bss_get_bssid(wpa_s, dst); 2908 if (bss) 2909 freq = bss->freq; 2910 if (freq <= 0) 2911 return -1; 2912 2913 wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)", 2914 MAC2STR(dst), freq); 2915 wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto); 2916 wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query); 2917 2918 len = 3 + wpabuf_len(adv_proto) + 2; 2919 if (query) 2920 len += wpabuf_len(query); 2921 buf = gas_build_initial_req(0, len); 2922 if (buf == NULL) 2923 return -1; 2924 2925 /* Advertisement Protocol IE */ 2926 wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO); 2927 wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */ 2928 wpabuf_put_u8(buf, query_resp_len_limit & 0x7f); 2929 wpabuf_put_buf(buf, adv_proto); 2930 2931 /* GAS Query */ 2932 if (query) { 2933 wpabuf_put_le16(buf, wpabuf_len(query)); 2934 wpabuf_put_buf(buf, query); 2935 } else 2936 wpabuf_put_le16(buf, 0); 2937 2938 res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s); 2939 if (res < 0) { 2940 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request"); 2941 wpabuf_free(buf); 2942 ret = -1; 2943 } else 2944 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token " 2945 "%u", res); 2946 2947 return ret; 2948 } 2949
