wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
   4  * Copyright (c) 2011-2014, Jouni Malinen <j@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_supplicant_deauthenticate(wpa_s,
  81                                               WLAN_REASON_DEAUTH_LEAVING);
  82         }
  83         wpa_s->disconnected = 0;
  84         wpa_s->reassociate = 1;
  85         tried = wpa_s->interworking_fast_assoc_tried;
  86         wpa_s->interworking_fast_assoc_tried = 1;
  87
  88         if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0)
  89                 return;
  90
  91         wpa_s->interworking_fast_assoc_tried = 0;
  92         wpa_supplicant_req_scan(wpa_s, 0, 0);
  93 }
  94
  95
  96 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  97                                       struct wpabuf *extra)
  98 {
  99         struct wpabuf *buf;
 100         size_t i;
 101         u8 *len_pos;
 102
 103         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
 104                                          (extra ? wpabuf_len(extra) : 0));
 105         if (buf == NULL)
 106                 return NULL;
 107
 108         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
 109         for (i = 0; i < num_ids; i++)
 110                 wpabuf_put_le16(buf, info_ids[i]);
 111         gas_anqp_set_element_len(buf, len_pos);
 112         if (extra)
 113                 wpabuf_put_buf(buf, extra);
 114
 115         gas_anqp_set_len(buf);
 116
 117         return buf;
 118 }
 119
 120
 121 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
 122                                       u8 dialog_token,
 123                                       enum gas_query_result result,
 124                                       const struct wpabuf *adv_proto,
 125                                       const struct wpabuf *resp,
 126                                       u16 status_code)
 127 {
 128         struct wpa_supplicant *wpa_s = ctx;
 129
 130         wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
 131                    " dialog_token=%u result=%d status_code=%u",
 132                    MAC2STR(dst), dialog_token, result, status_code);
 133         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 134                      status_code);
 135         interworking_next_anqp_fetch(wpa_s);
 136 }
 137
 138
 139 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 140 {
 141         struct wpa_cred *cred;
 142
 143         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 144                 if (cred->roaming_consortium_len)
 145                         return 1;
 146                 if (cred->required_roaming_consortium_len)
 147                         return 1;
 148         }
 149         return 0;
 150 }
 151
 152
 153 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 154 {
 155         struct wpa_cred *cred;
 156
 157         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 158                 if (cred->pcsc || cred->imsi)
 159                         return 1;
 160         }
 161         return 0;
 162 }
 163
 164
 165 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 166 {
 167         struct wpa_cred *cred;
 168
 169         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 170                 if (cred->pcsc || cred->imsi)
 171                         continue;
 172                 if (!cred->eap_method)
 173                         return 1;
 174                 if (cred->realm && cred->roaming_consortium_len == 0)
 175                         return 1;
 176         }
 177         return 0;
 178 }
 179
 180
 181 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 182 {
 183         struct wpa_cred *cred;
 184
 185         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 186                 if (cred->domain || cred->pcsc || cred->imsi ||
 187                     cred->roaming_partner)
 188                         return 1;
 189         }
 190         return 0;
 191 }
 192
 193
 194 #ifdef CONFIG_HS20
 195
 196 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
 197 {
 198         struct wpa_cred *cred;
 199
 200         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 201                 if (cred->min_dl_bandwidth_home ||
 202                     cred->min_ul_bandwidth_home ||
 203                     cred->min_dl_bandwidth_roaming ||
 204                     cred->min_ul_bandwidth_roaming)
 205                         return 1;
 206         }
 207         return 0;
 208 }
 209
 210
 211 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
 212 {
 213         struct wpa_cred *cred;
 214
 215         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 216                 if (cred->num_req_conn_capab)
 217                         return 1;
 218         }
 219         return 0;
 220 }
 221
 222 #endif /* CONFIG_HS20 */
 223
 224
 225 static int additional_roaming_consortiums(struct wpa_bss *bss)
 226 {
 227         const u8 *ie;
 228         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 229         if (ie == NULL || ie[1] == 0)
 230                 return 0;
 231         return ie[2]; /* Number of ANQP OIs */
 232 }
 233
 234
 235 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 236 {
 237         struct wpa_supplicant *wpa_s = eloop_ctx;
 238         interworking_next_anqp_fetch(wpa_s);
 239 }
 240
 241
 242 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 243                                       struct wpa_bss *bss)
 244 {
 245         struct wpabuf *buf;
 246         int ret = 0;
 247         int res;
 248         u16 info_ids[8];
 249         size_t num_info_ids = 0;
 250         struct wpabuf *extra = NULL;
 251         int all = wpa_s->fetch_all_anqp;
 252
 253         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 254                    MAC2STR(bss->bssid));
 255         wpa_s->interworking_gas_bss = bss;
 256
 257         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 258         if (all) {
 259                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 260                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 261         }
 262         if (all || (cred_with_roaming_consortium(wpa_s) &&
 263                     additional_roaming_consortiums(bss)))
 264                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 265         if (all)
 266                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 267         if (all || cred_with_nai_realm(wpa_s))
 268                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 269         if (all || cred_with_3gpp(wpa_s)) {
 270                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 271                 wpa_supplicant_scard_init(wpa_s, NULL);
 272         }
 273         if (all || cred_with_domain(wpa_s))
 274                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 275         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 276                     (u8 *) info_ids, num_info_ids * 2);
 277
 278 #ifdef CONFIG_HS20
 279         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 280                 u8 *len_pos;
 281
 282                 extra = wpabuf_alloc(100);
 283                 if (!extra)
 284                         return -1;
 285
 286                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 287                 wpabuf_put_be24(extra, OUI_WFA);
 288                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 289                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 290                 wpabuf_put_u8(extra, 0); /* Reserved */
 291                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 292                 if (all)
 293                         wpabuf_put_u8(extra,
 294                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 295                 if (all || cred_with_min_backhaul(wpa_s))
 296                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 297                 if (all || cred_with_conn_capab(wpa_s))
 298                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 299                 if (all)
 300                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 301                 if (all)
 302                         wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
 303                 gas_anqp_set_element_len(extra, len_pos);
 304         }
 305 #endif /* CONFIG_HS20 */
 306
 307         buf = anqp_build_req(info_ids, num_info_ids, extra);
 308         wpabuf_free(extra);
 309         if (buf == NULL)
 310                 return -1;
 311
 312         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 313                             interworking_anqp_resp_cb, wpa_s);
 314         if (res < 0) {
 315                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 316                 wpabuf_free(buf);
 317                 ret = -1;
 318                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 319                                        NULL);
 320         } else
 321                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 322                            "%u", res);
 323
 324         return ret;
 325 }
 326
 327
 328 struct nai_realm_eap {
 329         u8 method;
 330         u8 inner_method;
 331         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 332         u8 cred_type;
 333         u8 tunneled_cred_type;
 334 };
 335
 336 struct nai_realm {
 337         u8 encoding;
 338         char *realm;
 339         u8 eap_count;
 340         struct nai_realm_eap *eap;
 341 };
 342
 343
 344 static void nai_realm_free(struct nai_realm *realms, u16 count)
 345 {
 346         u16 i;
 347
 348         if (realms == NULL)
 349                 return;
 350         for (i = 0; i < count; i++) {
 351                 os_free(realms[i].eap);
 352                 os_free(realms[i].realm);
 353         }
 354         os_free(realms);
 355 }
 356
 357
 358 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 359                                       const u8 *end)
 360 {
 361         u8 elen, auth_count, a;
 362         const u8 *e_end;
 363
 364         if (pos + 3 > end) {
 365                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 366                 return NULL;
 367         }
 368
 369         elen = *pos++;
 370         if (pos + elen > end || elen < 2) {
 371                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 372                 return NULL;
 373         }
 374         e_end = pos + elen;
 375         e->method = *pos++;
 376         auth_count = *pos++;
 377         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 378                    elen, e->method, auth_count);
 379
 380         for (a = 0; a < auth_count; a++) {
 381                 u8 id, len;
 382
 383                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 384                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 385                                    "Parameter subfield");
 386                         return NULL;
 387                 }
 388
 389                 id = *pos++;
 390                 len = *pos++;
 391
 392                 switch (id) {
 393                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 394                         if (len < 1)
 395                                 break;
 396                         e->inner_non_eap = *pos;
 397                         if (e->method != EAP_TYPE_TTLS)
 398                                 break;
 399                         switch (*pos) {
 400                         case NAI_REALM_INNER_NON_EAP_PAP:
 401                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 402                                 break;
 403                         case NAI_REALM_INNER_NON_EAP_CHAP:
 404                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 405                                 break;
 406                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 407                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 408                                 break;
 409                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 410                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 411                                 break;
 412                         }
 413                         break;
 414                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 415                         if (len < 1)
 416                                 break;
 417                         e->inner_method = *pos;
 418                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 419                                    e->inner_method);
 420                         break;
 421                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 422                         if (len < 1)
 423                                 break;
 424                         e->cred_type = *pos;
 425                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 426                                    e->cred_type);
 427                         break;
 428                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 429                         if (len < 1)
 430                                 break;
 431                         e->tunneled_cred_type = *pos;
 432                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 433                                    "Type: %u", e->tunneled_cred_type);
 434                         break;
 435                 default:
 436                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 437                                    "Parameter: id=%u len=%u", id, len);
 438                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 439                                     "Value", pos, len);
 440                         break;
 441                 }
 442
 443                 pos += len;
 444         }
 445
 446         return e_end;
 447 }
 448
 449
 450 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 451                                         const u8 *end)
 452 {
 453         u16 len;
 454         const u8 *f_end;
 455         u8 realm_len, e;
 456
 457         if (end - pos < 4) {
 458                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 459                            "fixed fields");
 460                 return NULL;
 461         }
 462
 463         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 464         pos += 2;
 465         if (pos + len > end || len < 3) {
 466                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 467                            "(len=%u; left=%u)",
 468                            len, (unsigned int) (end - pos));
 469                 return NULL;
 470         }
 471         f_end = pos + len;
 472
 473         r->encoding = *pos++;
 474         realm_len = *pos++;
 475         if (pos + realm_len > f_end) {
 476                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 477                            "(len=%u; left=%u)",
 478                            realm_len, (unsigned int) (f_end - pos));
 479                 return NULL;
 480         }
 481         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 482         r->realm = dup_binstr(pos, realm_len);
 483         if (r->realm == NULL)
 484                 return NULL;
 485         pos += realm_len;
 486
 487         if (pos + 1 > f_end) {
 488                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 489                 return NULL;
 490         }
 491         r->eap_count = *pos++;
 492         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 493         if (pos + r->eap_count * 3 > f_end) {
 494                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 495                 return NULL;
 496         }
 497         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 498         if (r->eap == NULL)
 499                 return NULL;
 500
 501         for (e = 0; e < r->eap_count; e++) {
 502                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 503                 if (pos == NULL)
 504                         return NULL;
 505         }
 506
 507         return f_end;
 508 }
 509
 510
 511 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 512 {
 513         struct nai_realm *realm;
 514         const u8 *pos, *end;
 515         u16 i, num;
 516         size_t left;
 517
 518         if (anqp == NULL)
 519                 return NULL;
 520         left = wpabuf_len(anqp);
 521         if (left < 2)
 522                 return NULL;
 523
 524         pos = wpabuf_head_u8(anqp);
 525         end = pos + left;
 526         num = WPA_GET_LE16(pos);
 527         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 528         pos += 2;
 529         left -= 2;
 530
 531         if (num > left / 5) {
 532                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 533                            "enough data (%u octets) for that many realms",
 534                            num, (unsigned int) left);
 535                 return NULL;
 536         }
 537
 538         realm = os_calloc(num, sizeof(struct nai_realm));
 539         if (realm == NULL)
 540                 return NULL;
 541
 542         for (i = 0; i < num; i++) {
 543                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 544                 if (pos == NULL) {
 545                         nai_realm_free(realm, num);
 546                         return NULL;
 547                 }
 548         }
 549
 550         *count = num;
 551         return realm;
 552 }
 553
 554
 555 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 556 {
 557         char *tmp, *pos, *end;
 558         int match = 0;
 559
 560         if (realm->realm == NULL || home_realm == NULL)
 561                 return 0;
 562
 563         if (os_strchr(realm->realm, ';') == NULL)
 564                 return os_strcasecmp(realm->realm, home_realm) == 0;
 565
 566         tmp = os_strdup(realm->realm);
 567         if (tmp == NULL)
 568                 return 0;
 569
 570         pos = tmp;
 571         while (*pos) {
 572                 end = os_strchr(pos, ';');
 573                 if (end)
 574                         *end = '\0';
 575                 if (os_strcasecmp(pos, home_realm) == 0) {
 576                         match = 1;
 577                         break;
 578                 }
 579                 if (end == NULL)
 580                         break;
 581                 pos = end + 1;
 582         }
 583
 584         os_free(tmp);
 585
 586         return match;
 587 }
 588
 589
 590 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
 591                                    struct nai_realm_eap *eap)
 592 {
 593         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
 594                 wpa_msg(wpa_s, MSG_DEBUG,
 595                         "nai-realm-cred-username: EAP method not supported: %d",
 596                         eap->method);
 597                 return 0; /* method not supported */
 598         }
 599
 600         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
 601             eap->method != EAP_TYPE_FAST) {
 602                 /* Only tunneled methods with username/password supported */
 603                 wpa_msg(wpa_s, MSG_DEBUG,
 604                         "nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
 605                         eap->method);
 606                 return 0;
 607         }
 608
 609         if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
 610                 if (eap->inner_method &&
 611                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
 612                         wpa_msg(wpa_s, MSG_DEBUG,
 613                                 "nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
 614                                 eap->inner_method);
 615                         return 0;
 616                 }
 617                 if (!eap->inner_method &&
 618                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
 619                         wpa_msg(wpa_s, MSG_DEBUG,
 620                                 "nai-realm-cred-username: MSCHAPv2 not supported");
 621                         return 0;
 622                 }
 623         }
 624
 625         if (eap->method == EAP_TYPE_TTLS) {
 626                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 627                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 628                 if (eap->inner_method &&
 629                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
 630                         wpa_msg(wpa_s, MSG_DEBUG,
 631                                 "nai-realm-cred-username: TTLS, but inner not supported: %d",
 632                                 eap->inner_method);
 633                         return 0;
 634                 }
 635                 if (eap->inner_non_eap &&
 636                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 637                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 638                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 639                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
 640                         wpa_msg(wpa_s, MSG_DEBUG,
 641                                 "nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
 642                                 eap->inner_non_eap);
 643                         return 0;
 644                 }
 645         }
 646
 647         if (eap->inner_method &&
 648             eap->inner_method != EAP_TYPE_GTC &&
 649             eap->inner_method != EAP_TYPE_MSCHAPV2) {
 650                 wpa_msg(wpa_s, MSG_DEBUG,
 651                         "nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
 652                         eap->inner_method);
 653                 return 0;
 654         }
 655
 656         return 1;
 657 }
 658
 659
 660 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
 661                                struct nai_realm_eap *eap)
 662 {
 663         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
 664                 wpa_msg(wpa_s, MSG_DEBUG,
 665                         "nai-realm-cred-cert: Method not supported: %d",
 666                         eap->method);
 667                 return 0; /* method not supported */
 668         }
 669
 670         if (eap->method != EAP_TYPE_TLS) {
 671                 /* Only EAP-TLS supported for credential authentication */
 672                 wpa_msg(wpa_s, MSG_DEBUG,
 673                         "nai-realm-cred-cert: Method not TLS: %d",
 674                         eap->method);
 675                 return 0;
 676         }
 677
 678         return 1;
 679 }
 680
 681
 682 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
 683                                                  struct wpa_cred *cred,
 684                                                  struct nai_realm *realm)
 685 {
 686         u8 e;
 687
 688         if (cred->username == NULL ||
 689             cred->username[0] == '\0' ||
 690             ((cred->password == NULL ||
 691               cred->password[0] == '\0') &&
 692              (cred->private_key == NULL ||
 693               cred->private_key[0] == '\0'))) {
 694                 wpa_msg(wpa_s, MSG_DEBUG,
 695                         "nai-realm-find-eap: incomplete cred info: username: %s  password: %s private_key: %s",
 696                         cred->username ? cred->username : "NULL",
 697                         cred->password ? cred->password : "NULL",
 698                         cred->private_key ? cred->private_key : "NULL");
 699                 return NULL;
 700         }
 701
 702         for (e = 0; e < realm->eap_count; e++) {
 703                 struct nai_realm_eap *eap = &realm->eap[e];
 704                 if (cred->password && cred->password[0] &&
 705                     nai_realm_cred_username(wpa_s, eap))
 706                         return eap;
 707                 if (cred->private_key && cred->private_key[0] &&
 708                     nai_realm_cred_cert(wpa_s, eap))
 709                         return eap;
 710         }
 711
 712         return NULL;
 713 }
 714
 715
 716 #ifdef INTERWORKING_3GPP
 717
 718 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 719 {
 720         u8 plmn[3], plmn2[3];
 721         const u8 *pos, *end;
 722         u8 udhl;
 723
 724         /*
 725          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 726          * operator is allowed to include only two digits of the MNC, so allow
 727          * matches based on both two and three digit MNC assumptions. Since some
 728          * SIM/USIM cards may not expose MNC length conveniently, we may be
 729          * provided the default MNC length 3 here and as such, checking with MNC
 730          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 731          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 732          * with otherwise matching values would not be good idea in general, so
 733          * this should not result in selecting incorrect networks.
 734          */
 735         /* Match with 3 digit MNC */
 736         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 737         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 738         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 739         /* Match with 2 digit MNC */
 740         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 741         plmn2[1] = (imsi[2] - '0') | 0xf0;
 742         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 743
 744         if (anqp == NULL)
 745                 return 0;
 746         pos = wpabuf_head_u8(anqp);
 747         end = pos + wpabuf_len(anqp);
 748         if (pos + 2 > end)
 749                 return 0;
 750         if (*pos != 0) {
 751                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 752                 return 0;
 753         }
 754         pos++;
 755         udhl = *pos++;
 756         if (pos + udhl > end) {
 757                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 758                 return 0;
 759         }
 760         end = pos + udhl;
 761
 762         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 763                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 764                    imsi, mnc_len);
 765
 766         while (pos + 2 <= end) {
 767                 u8 iei, len;
 768                 const u8 *l_end;
 769                 iei = *pos++;
 770                 len = *pos++ & 0x7f;
 771                 if (pos + len > end)
 772                         break;
 773                 l_end = pos + len;
 774
 775                 if (iei == 0 && len > 0) {
 776                         /* PLMN List */
 777                         u8 num, i;
 778                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 779                                     pos, len);
 780                         num = *pos++;
 781                         for (i = 0; i < num; i++) {
 782                                 if (pos + 3 > l_end)
 783                                         break;
 784                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 785                                     os_memcmp(pos, plmn2, 3) == 0)
 786                                         return 1; /* Found matching PLMN */
 787                                 pos += 3;
 788                         }
 789                 } else {
 790                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 791                                     pos, len);
 792                 }
 793
 794                 pos = l_end;
 795         }
 796
 797         return 0;
 798 }
 799
 800
 801 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 802                           size_t mnc_len, char prefix)
 803 {
 804         const char *sep, *msin;
 805         char *end, *pos;
 806         size_t msin_len, plmn_len;
 807
 808         /*
 809          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 810          * Root NAI:
 811          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 812          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 813          */
 814
 815         if (imsi == NULL || os_strlen(imsi) > 16) {
 816                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 817                 return -1;
 818         }
 819         sep = os_strchr(imsi, '-');
 820         if (sep) {
 821                 plmn_len = sep - imsi;
 822                 msin = sep + 1;
 823         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 824                 plmn_len = 3 + mnc_len;
 825                 msin = imsi + plmn_len;
 826         } else
 827                 return -1;
 828         if (plmn_len != 5 && plmn_len != 6)
 829                 return -1;
 830         msin_len = os_strlen(msin);
 831
 832         pos = nai;
 833         end = nai + nai_len;
 834         if (prefix)
 835                 *pos++ = prefix;
 836         os_memcpy(pos, imsi, plmn_len);
 837         pos += plmn_len;
 838         os_memcpy(pos, msin, msin_len);
 839         pos += msin_len;
 840         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 841         if (plmn_len == 5) {
 842                 *pos++ = '0';
 843                 *pos++ = imsi[3];
 844                 *pos++ = imsi[4];
 845         } else {
 846                 *pos++ = imsi[3];
 847                 *pos++ = imsi[4];
 848                 *pos++ = imsi[5];
 849         }
 850         os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 851                     imsi[0], imsi[1], imsi[2]);
 852
 853         return 0;
 854 }
 855
 856
 857 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 858 {
 859         char nai[100];
 860         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 861                 return -1;
 862         return wpa_config_set_quoted(ssid, "identity", nai);
 863 }
 864
 865 #endif /* INTERWORKING_3GPP */
 866
 867
 868 static int already_connected(struct wpa_supplicant *wpa_s,
 869                              struct wpa_cred *cred, struct wpa_bss *bss)
 870 {
 871         struct wpa_ssid *ssid, *sel_ssid;
 872         struct wpa_bss *selected;
 873
 874         if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
 875                 return 0;
 876
 877         ssid = wpa_s->current_ssid;
 878         if (ssid->parent_cred != cred)
 879                 return 0;
 880
 881         if (ssid->ssid_len != bss->ssid_len ||
 882             os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 883                 return 0;
 884
 885         sel_ssid = NULL;
 886         selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
 887         if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
 888                 return 0; /* higher priority network in scan results */
 889
 890         return 1;
 891 }
 892
 893
 894 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
 895                                      struct wpa_cred *cred,
 896                                      struct wpa_bss *bss)
 897 {
 898         struct wpa_ssid *ssid;
 899
 900         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 901                 if (ssid->parent_cred != cred)
 902                         continue;
 903                 if (ssid->ssid_len != bss->ssid_len ||
 904                     os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 905                         continue;
 906
 907                 break;
 908         }
 909
 910         if (ssid == NULL)
 911                 return;
 912
 913         wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
 914
 915         if (ssid == wpa_s->current_ssid) {
 916                 wpa_sm_set_config(wpa_s->wpa, NULL);
 917                 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 918                 wpa_supplicant_deauthenticate(wpa_s,
 919                                               WLAN_REASON_DEAUTH_LEAVING);
 920         }
 921
 922         wpas_notify_network_removed(wpa_s, ssid);
 923         wpa_config_remove_network(wpa_s->conf, ssid->id);
 924 }
 925
 926
 927 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 928                                         struct wpa_ssid *ssid)
 929 {
 930         const char *key_mgmt = NULL;
 931 #ifdef CONFIG_IEEE80211R
 932         int res;
 933         struct wpa_driver_capa capa;
 934
 935         res = wpa_drv_get_capa(wpa_s, &capa);
 936         if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
 937                 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 938                         "WPA-EAP WPA-EAP-SHA256 FT-EAP" :
 939                         "WPA-EAP FT-EAP";
 940         }
 941 #endif /* CONFIG_IEEE80211R */
 942
 943         if (!key_mgmt)
 944                 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 945                         "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
 946         if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0)
 947                 return -1;
 948         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 949                 return -1;
 950         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 951                 return -1;
 952         return 0;
 953 }
 954
 955
 956 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 957                                      struct wpa_cred *cred,
 958                                      struct wpa_bss *bss)
 959 {
 960 #ifdef INTERWORKING_3GPP
 961         struct wpa_ssid *ssid;
 962         int eap_type;
 963         int res;
 964         char prefix;
 965
 966         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 967                 return -1;
 968
 969         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 970                    MAC2STR(bss->bssid));
 971
 972         if (already_connected(wpa_s, cred, bss)) {
 973                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
 974                         MAC2STR(bss->bssid));
 975                 return 0;
 976         }
 977
 978         remove_duplicate_network(wpa_s, cred, bss);
 979
 980         ssid = wpa_config_add_network(wpa_s->conf);
 981         if (ssid == NULL)
 982                 return -1;
 983         ssid->parent_cred = cred;
 984
 985         wpas_notify_network_added(wpa_s, ssid);
 986         wpa_config_set_network_defaults(ssid);
 987         ssid->priority = cred->priority;
 988         ssid->temporary = 1;
 989         ssid->ssid = os_zalloc(bss->ssid_len + 1);
 990         if (ssid->ssid == NULL)
 991                 goto fail;
 992         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 993         ssid->ssid_len = bss->ssid_len;
 994         ssid->eap.sim_num = cred->sim_num;
 995
 996         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 997                 goto fail;
 998
 999         eap_type = EAP_TYPE_SIM;
1000         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1001                 eap_type = EAP_TYPE_AKA;
1002         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1003                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1004                     cred->eap_method[0].method == EAP_TYPE_AKA ||
1005                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1006                         eap_type = cred->eap_method[0].method;
1007         }
1008
1009         switch (eap_type) {
1010         case EAP_TYPE_SIM:
1011                 prefix = '1';
1012                 res = wpa_config_set(ssid, "eap", "SIM", 0);
1013                 break;
1014         case EAP_TYPE_AKA:
1015                 prefix = '0';
1016                 res = wpa_config_set(ssid, "eap", "AKA", 0);
1017                 break;
1018         case EAP_TYPE_AKA_PRIME:
1019                 prefix = '6';
1020                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
1021                 break;
1022         default:
1023                 res = -1;
1024                 break;
1025         }
1026         if (res < 0) {
1027                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
1028                            eap_type);
1029                 goto fail;
1030         }
1031
1032         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1033                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
1034                 goto fail;
1035         }
1036
1037         if (cred->milenage && cred->milenage[0]) {
1038                 if (wpa_config_set_quoted(ssid, "password",
1039                                           cred->milenage) < 0)
1040                         goto fail;
1041         } else if (cred->pcsc) {
1042                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1043                         goto fail;
1044                 if (wpa_s->conf->pcsc_pin &&
1045                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1046                     < 0)
1047                         goto fail;
1048         }
1049
1050         wpa_s->next_ssid = ssid;
1051         wpa_config_update_prio_list(wpa_s->conf);
1052         interworking_reconnect(wpa_s);
1053
1054         return 0;
1055
1056 fail:
1057         wpas_notify_network_removed(wpa_s, ssid);
1058         wpa_config_remove_network(wpa_s->conf, ssid->id);
1059 #endif /* INTERWORKING_3GPP */
1060         return -1;
1061 }
1062
1063
1064 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
1065                                             size_t rc_len)
1066 {
1067         const u8 *pos, *end;
1068         u8 lens;
1069
1070         if (ie == NULL)
1071                 return 0;
1072
1073         pos = ie + 2;
1074         end = ie + 2 + ie[1];
1075
1076         /* Roaming Consortium element:
1077          * Number of ANQP OIs
1078          * OI #1 and #2 lengths
1079          * OI #1, [OI #2], [OI #3]
1080          */
1081
1082         if (pos + 2 > end)
1083                 return 0;
1084
1085         pos++; /* skip Number of ANQP OIs */
1086         lens = *pos++;
1087         if (pos + (lens & 0x0f) + (lens >> 4) > end)
1088                 return 0;
1089
1090         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1091                 return 1;
1092         pos += lens & 0x0f;
1093
1094         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1095                 return 1;
1096         pos += lens >> 4;
1097
1098         if (pos < end && (size_t) (end - pos) == rc_len &&
1099             os_memcmp(pos, rc_id, rc_len) == 0)
1100                 return 1;
1101
1102         return 0;
1103 }
1104
1105
1106 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1107                                          const u8 *rc_id, size_t rc_len)
1108 {
1109         const u8 *pos, *end;
1110         u8 len;
1111
1112         if (anqp == NULL)
1113                 return 0;
1114
1115         pos = wpabuf_head(anqp);
1116         end = pos + wpabuf_len(anqp);
1117
1118         /* Set of <OI Length, OI> duples */
1119         while (pos < end) {
1120                 len = *pos++;
1121                 if (pos + len > end)
1122                         break;
1123                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1124                         return 1;
1125                 pos += len;
1126         }
1127
1128         return 0;
1129 }
1130
1131
1132 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1133                                     const u8 *rc_id, size_t rc_len)
1134 {
1135         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1136                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1137 }
1138
1139
1140 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1141 {
1142         const u8 *ie;
1143
1144         if (cred->required_roaming_consortium_len == 0)
1145                 return 0;
1146
1147         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1148
1149         if (ie == NULL &&
1150             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1151                 return 1;
1152
1153         return !roaming_consortium_match(ie,
1154                                          bss->anqp ?
1155                                          bss->anqp->roaming_consortium : NULL,
1156                                          cred->required_roaming_consortium,
1157                                          cred->required_roaming_consortium_len);
1158 }
1159
1160
1161 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1162 {
1163         size_t i;
1164
1165         if (!cred->excluded_ssid)
1166                 return 0;
1167
1168         for (i = 0; i < cred->num_excluded_ssid; i++) {
1169                 struct excluded_ssid *e = &cred->excluded_ssid[i];
1170                 if (bss->ssid_len == e->ssid_len &&
1171                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1172                         return 1;
1173         }
1174
1175         return 0;
1176 }
1177
1178
1179 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1180                                    struct wpa_cred *cred, struct wpa_bss *bss)
1181 {
1182         int res;
1183         unsigned int dl_bandwidth, ul_bandwidth;
1184         const u8 *wan;
1185         u8 wan_info, dl_load, ul_load;
1186         u16 lmd;
1187         u32 ul_speed, dl_speed;
1188
1189         if (!cred->min_dl_bandwidth_home &&
1190             !cred->min_ul_bandwidth_home &&
1191             !cred->min_dl_bandwidth_roaming &&
1192             !cred->min_ul_bandwidth_roaming)
1193                 return 0; /* No bandwidth constraint specified */
1194
1195         if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1196                 return 0; /* No WAN Metrics known - ignore constraint */
1197
1198         wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1199         wan_info = wan[0];
1200         if (wan_info & BIT(3))
1201                 return 1; /* WAN link at capacity */
1202         lmd = WPA_GET_LE16(wan + 11);
1203         if (lmd == 0)
1204                 return 0; /* Downlink/Uplink Load was not measured */
1205         dl_speed = WPA_GET_LE32(wan + 1);
1206         ul_speed = WPA_GET_LE32(wan + 5);
1207         dl_load = wan[9];
1208         ul_load = wan[10];
1209
1210         if (dl_speed >= 0xffffff)
1211                 dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1212         else
1213                 dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1214
1215         if (ul_speed >= 0xffffff)
1216                 ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1217         else
1218                 ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1219
1220         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1221                                         bss->anqp->domain_name : NULL);
1222         if (res > 0) {
1223                 if (cred->min_dl_bandwidth_home > dl_bandwidth)
1224                         return 1;
1225                 if (cred->min_ul_bandwidth_home > ul_bandwidth)
1226                         return 1;
1227         } else {
1228                 if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1229                         return 1;
1230                 if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1231                         return 1;
1232         }
1233
1234         return 0;
1235 }
1236
1237
1238 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1239                                   struct wpa_cred *cred, struct wpa_bss *bss)
1240 {
1241         const u8 *ie;
1242         int res;
1243
1244         if (!cred->max_bss_load)
1245                 return 0; /* No BSS Load constraint specified */
1246
1247         ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1248         if (ie == NULL || ie[1] < 3)
1249                 return 0; /* No BSS Load advertised */
1250
1251         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1252                                         bss->anqp->domain_name : NULL);
1253         if (res <= 0)
1254                 return 0; /* Not a home network */
1255
1256         return ie[4] > cred->max_bss_load;
1257 }
1258
1259
1260 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1261 {
1262         while (pos + 4 <= end) {
1263                 if (pos[0] == proto && pos[3] == 1 /* Open */)
1264                         return 1;
1265                 pos += 4;
1266         }
1267
1268         return 0;
1269 }
1270
1271
1272 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1273                                 u16 port)
1274 {
1275         while (pos + 4 <= end) {
1276                 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1277                     pos[3] == 1 /* Open */)
1278                         return 1;
1279                 pos += 4;
1280         }
1281
1282         return 0;
1283 }
1284
1285
1286 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1287                                    struct wpa_cred *cred, struct wpa_bss *bss)
1288 {
1289         int res;
1290         const u8 *capab, *end;
1291         unsigned int i, j;
1292         int *ports;
1293
1294         if (!cred->num_req_conn_capab)
1295                 return 0; /* No connection capability constraint specified */
1296
1297         if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1298                 return 0; /* No Connection Capability known - ignore constraint
1299                            */
1300
1301         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1302                                         bss->anqp->domain_name : NULL);
1303         if (res > 0)
1304                 return 0; /* No constraint in home network */
1305
1306         capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1307         end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1308
1309         for (i = 0; i < cred->num_req_conn_capab; i++) {
1310                 ports = cred->req_conn_capab_port[i];
1311                 if (!ports) {
1312                         if (!has_proto_match(capab, end,
1313                                              cred->req_conn_capab_proto[i]))
1314                                 return 1;
1315                 } else {
1316                         for (j = 0; ports[j] > -1; j++) {
1317                                 if (!has_proto_port_match(
1318                                             capab, end,
1319                                             cred->req_conn_capab_proto[i],
1320                                             ports[j]))
1321                                         return 1;
1322                         }
1323                 }
1324         }
1325
1326         return 0;
1327 }
1328
1329
1330 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1331         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1332         int *excluded)
1333 {
1334         struct wpa_cred *cred, *selected = NULL;
1335         const u8 *ie;
1336         int is_excluded = 0;
1337
1338         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1339
1340         if (ie == NULL &&
1341             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1342                 return NULL;
1343
1344         if (wpa_s->conf->cred == NULL)
1345                 return NULL;
1346
1347         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1348                 if (cred->roaming_consortium_len == 0)
1349                         continue;
1350
1351                 if (!roaming_consortium_match(ie,
1352                                               bss->anqp ?
1353                                               bss->anqp->roaming_consortium :
1354                                               NULL,
1355                                               cred->roaming_consortium,
1356                                               cred->roaming_consortium_len))
1357                         continue;
1358
1359                 if (cred_no_required_oi_match(cred, bss))
1360                         continue;
1361                 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1362                         continue;
1363                 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1364                         continue;
1365                 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1366                         continue;
1367                 if (cred_excluded_ssid(cred, bss)) {
1368                         if (excluded == NULL)
1369                                 continue;
1370                         if (selected == NULL) {
1371                                 selected = cred;
1372                                 is_excluded = 1;
1373                         }
1374                 } else {
1375                         if (selected == NULL || is_excluded ||
1376                             cred_prio_cmp(selected, cred) < 0) {
1377                                 selected = cred;
1378                                 is_excluded = 0;
1379                         }
1380                 }
1381         }
1382
1383         if (excluded)
1384                 *excluded = is_excluded;
1385
1386         return selected;
1387 }
1388
1389
1390 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1391                                        struct wpa_cred *cred, int ttls)
1392 {
1393         if (cred->eap_method) {
1394                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1395                         cred->eap_method->method == EAP_TYPE_TTLS;
1396
1397                 os_free(ssid->eap.eap_methods);
1398                 ssid->eap.eap_methods =
1399                         os_malloc(sizeof(struct eap_method_type) * 2);
1400                 if (ssid->eap.eap_methods == NULL)
1401                         return -1;
1402                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1403                           sizeof(*cred->eap_method));
1404                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1405                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1406         }
1407
1408         if (ttls && cred->username && cred->username[0]) {
1409                 const char *pos;
1410                 char *anon;
1411                 /* Use anonymous NAI in Phase 1 */
1412                 pos = os_strchr(cred->username, '@');
1413                 if (pos) {
1414                         size_t buflen = 9 + os_strlen(pos) + 1;
1415                         anon = os_malloc(buflen);
1416                         if (anon == NULL)
1417                                 return -1;
1418                         os_snprintf(anon, buflen, "anonymous%s", pos);
1419                 } else if (cred->realm) {
1420                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1421                         anon = os_malloc(buflen);
1422                         if (anon == NULL)
1423                                 return -1;
1424                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1425                 } else {
1426                         anon = os_strdup("anonymous");
1427                         if (anon == NULL)
1428                                 return -1;
1429                 }
1430                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1431                     0) {
1432                         os_free(anon);
1433                         return -1;
1434                 }
1435                 os_free(anon);
1436         }
1437
1438         if (cred->username && cred->username[0] &&
1439             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1440                 return -1;
1441
1442         if (cred->password && cred->password[0]) {
1443                 if (cred->ext_password &&
1444                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1445                         return -1;
1446                 if (!cred->ext_password &&
1447                     wpa_config_set_quoted(ssid, "password", cred->password) <
1448                     0)
1449                         return -1;
1450         }
1451
1452         if (cred->client_cert && cred->client_cert[0] &&
1453             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1454                 return -1;
1455
1456 #ifdef ANDROID
1457         if (cred->private_key &&
1458             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1459                 /* Use OpenSSL engine configuration for Android keystore */
1460                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1461                     wpa_config_set_quoted(ssid, "key_id",
1462                                           cred->private_key + 11) < 0 ||
1463                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1464                         return -1;
1465         } else
1466 #endif /* ANDROID */
1467         if (cred->private_key && cred->private_key[0] &&
1468             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1469                 return -1;
1470
1471         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1472             wpa_config_set_quoted(ssid, "private_key_passwd",
1473                                   cred->private_key_passwd) < 0)
1474                 return -1;
1475
1476         if (cred->phase1) {
1477                 os_free(ssid->eap.phase1);
1478                 ssid->eap.phase1 = os_strdup(cred->phase1);
1479         }
1480         if (cred->phase2) {
1481                 os_free(ssid->eap.phase2);
1482                 ssid->eap.phase2 = os_strdup(cred->phase2);
1483         }
1484
1485         if (cred->ca_cert && cred->ca_cert[0] &&
1486             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1487                 return -1;
1488
1489         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1490             wpa_config_set_quoted(ssid, "domain_suffix_match",
1491                                   cred->domain_suffix_match) < 0)
1492                 return -1;
1493
1494         ssid->eap.ocsp = cred->ocsp;
1495
1496         return 0;
1497 }
1498
1499
1500 static int interworking_connect_roaming_consortium(
1501         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1502         struct wpa_bss *bss)
1503 {
1504         struct wpa_ssid *ssid;
1505
1506         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1507                    "roaming consortium match", MAC2STR(bss->bssid));
1508
1509         if (already_connected(wpa_s, cred, bss)) {
1510                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1511                         MAC2STR(bss->bssid));
1512                 return 0;
1513         }
1514
1515         remove_duplicate_network(wpa_s, cred, bss);
1516
1517         ssid = wpa_config_add_network(wpa_s->conf);
1518         if (ssid == NULL)
1519                 return -1;
1520         ssid->parent_cred = cred;
1521         wpas_notify_network_added(wpa_s, ssid);
1522         wpa_config_set_network_defaults(ssid);
1523         ssid->priority = cred->priority;
1524         ssid->temporary = 1;
1525         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1526         if (ssid->ssid == NULL)
1527                 goto fail;
1528         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1529         ssid->ssid_len = bss->ssid_len;
1530
1531         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1532                 goto fail;
1533
1534         if (cred->eap_method == NULL) {
1535                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1536                            "credential using roaming consortium");
1537                 goto fail;
1538         }
1539
1540         if (interworking_set_eap_params(
1541                     ssid, cred,
1542                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1543                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1544                 goto fail;
1545
1546         wpa_s->next_ssid = ssid;
1547         wpa_config_update_prio_list(wpa_s->conf);
1548         interworking_reconnect(wpa_s);
1549
1550         return 0;
1551
1552 fail:
1553         wpas_notify_network_removed(wpa_s, ssid);
1554         wpa_config_remove_network(wpa_s->conf, ssid->id);
1555         return -1;
1556 }
1557
1558
1559 static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
1560                                        struct wpa_bss *bss, int allow_excluded)
1561 {
1562         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1563         struct wpa_ssid *ssid;
1564         struct nai_realm *realm;
1565         struct nai_realm_eap *eap = NULL;
1566         u16 count, i;
1567         char buf[100];
1568         int excluded = 0, *excl = allow_excluded ? &excluded : NULL;
1569         const char *name;
1570
1571         if (wpa_s->conf->cred == NULL || bss == NULL)
1572                 return -1;
1573         if (disallowed_bssid(wpa_s, bss->bssid) ||
1574             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1575                 wpa_printf(MSG_DEBUG, "Interworking: Reject connection to disallowed BSS "
1576                            MACSTR, MAC2STR(bss->bssid));
1577                 return -1;
1578         }
1579
1580         wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1581                    " for connection (allow_excluded=%d)",
1582                    MAC2STR(bss->bssid), allow_excluded);
1583
1584         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1585                 /*
1586                  * We currently support only HS 2.0 networks and those are
1587                  * required to use WPA2-Enterprise.
1588                  */
1589                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1590                            "RSN");
1591                 return -1;
1592         }
1593
1594         cred_rc = interworking_credentials_available_roaming_consortium(
1595                 wpa_s, bss, 0, excl);
1596         if (cred_rc) {
1597                 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1598                            "consortium matching credential priority %d "
1599                            "sp_priority %d",
1600                            cred_rc->priority, cred_rc->sp_priority);
1601                 if (allow_excluded && excl && !(*excl))
1602                         excl = NULL;
1603         }
1604
1605         cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1606         if (cred) {
1607                 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
1608                            "matching credential priority %d sp_priority %d",
1609                            cred->priority, cred->sp_priority);
1610                 if (allow_excluded && excl && !(*excl))
1611                         excl = NULL;
1612         }
1613
1614         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1615                                                             excl);
1616         if (cred_3gpp) {
1617                 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
1618                            "credential priority %d sp_priority %d",
1619                            cred_3gpp->priority, cred_3gpp->sp_priority);
1620                 if (allow_excluded && excl && !(*excl))
1621                         excl = NULL;
1622         }
1623
1624         if (!cred_rc && !cred && !cred_3gpp) {
1625                 wpa_printf(MSG_DEBUG, "Interworking: No full credential matches - consider options without BW(etc.) limits");
1626                 cred_rc = interworking_credentials_available_roaming_consortium(
1627                         wpa_s, bss, 1, excl);
1628                 if (cred_rc) {
1629                         wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1630                                    "consortium matching credential priority %d "
1631                                    "sp_priority %d (ignore BW)",
1632                                    cred_rc->priority, cred_rc->sp_priority);
1633                         if (allow_excluded && excl && !(*excl))
1634                                 excl = NULL;
1635                 }
1636
1637                 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1638                                                                 excl);
1639                 if (cred) {
1640                         wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm "
1641                                    "list matching credential priority %d "
1642                                    "sp_priority %d (ignore BW)",
1643                                    cred->priority, cred->sp_priority);
1644                         if (allow_excluded && excl && !(*excl))
1645                                 excl = NULL;
1646                 }
1647
1648                 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1649                                                                     1, excl);
1650                 if (cred_3gpp) {
1651                         wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP "
1652                                    "matching credential priority %d "
1653                                    "sp_priority %d (ignore BW)",
1654                                    cred_3gpp->priority, cred_3gpp->sp_priority);
1655                         if (allow_excluded && excl && !(*excl))
1656                                 excl = NULL;
1657                 }
1658         }
1659
1660         if (cred_rc &&
1661             (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1662             (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1663                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1664                                                                bss);
1665
1666         if (cred_3gpp &&
1667             (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1668                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
1669         }
1670
1671         if (cred == NULL) {
1672                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1673                            "found for " MACSTR, MAC2STR(bss->bssid));
1674                 return -1;
1675         }
1676
1677         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1678                                 &count);
1679         if (realm == NULL) {
1680                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1681                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1682                 return -1;
1683         }
1684
1685         for (i = 0; i < count; i++) {
1686                 if (!nai_realm_match(&realm[i], cred->realm))
1687                         continue;
1688                 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1689                 if (eap)
1690                         break;
1691         }
1692
1693         if (!eap) {
1694                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1695                            "and EAP method found for " MACSTR,
1696                            MAC2STR(bss->bssid));
1697                 nai_realm_free(realm, count);
1698                 return -1;
1699         }
1700
1701         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1702                    MAC2STR(bss->bssid));
1703
1704         if (already_connected(wpa_s, cred, bss)) {
1705                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1706                         MAC2STR(bss->bssid));
1707                 nai_realm_free(realm, count);
1708                 return 0;
1709         }
1710
1711         remove_duplicate_network(wpa_s, cred, bss);
1712
1713         ssid = wpa_config_add_network(wpa_s->conf);
1714         if (ssid == NULL) {
1715                 nai_realm_free(realm, count);
1716                 return -1;
1717         }
1718         ssid->parent_cred = cred;
1719         wpas_notify_network_added(wpa_s, ssid);
1720         wpa_config_set_network_defaults(ssid);
1721         ssid->priority = cred->priority;
1722         ssid->temporary = 1;
1723         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1724         if (ssid->ssid == NULL)
1725                 goto fail;
1726         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1727         ssid->ssid_len = bss->ssid_len;
1728
1729         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1730                 goto fail;
1731
1732         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1733                                                      eap->method), 0) < 0)
1734                 goto fail;
1735
1736         switch (eap->method) {
1737         case EAP_TYPE_TTLS:
1738                 if (eap->inner_method) {
1739                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1740                                     eap_get_name(EAP_VENDOR_IETF,
1741                                                  eap->inner_method));
1742                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1743                                 goto fail;
1744                         break;
1745                 }
1746                 switch (eap->inner_non_eap) {
1747                 case NAI_REALM_INNER_NON_EAP_PAP:
1748                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1749                             0)
1750                                 goto fail;
1751                         break;
1752                 case NAI_REALM_INNER_NON_EAP_CHAP:
1753                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1754                             < 0)
1755                                 goto fail;
1756                         break;
1757                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1758                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1759                                            0) < 0)
1760                                 goto fail;
1761                         break;
1762                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1763                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1764                                            0) < 0)
1765                                 goto fail;
1766                         break;
1767                 default:
1768                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1769                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1770                                            0) < 0)
1771                                 goto fail;
1772                         break;
1773                 }
1774                 break;
1775         case EAP_TYPE_PEAP:
1776         case EAP_TYPE_FAST:
1777                 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1778                                    0) < 0)
1779                         goto fail;
1780                 if (wpa_config_set(ssid, "pac_file",
1781                                    "\"blob://pac_interworking\"", 0) < 0)
1782                         goto fail;
1783                 name = eap_get_name(EAP_VENDOR_IETF,
1784                                     eap->inner_method ? eap->inner_method :
1785                                     EAP_TYPE_MSCHAPV2);
1786                 if (name == NULL)
1787                         goto fail;
1788                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1789                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1790                         goto fail;
1791                 break;
1792         case EAP_TYPE_TLS:
1793                 break;
1794         }
1795
1796         if (interworking_set_eap_params(ssid, cred,
1797                                         eap->method == EAP_TYPE_TTLS) < 0)
1798                 goto fail;
1799
1800         nai_realm_free(realm, count);
1801
1802         wpa_s->next_ssid = ssid;
1803         wpa_config_update_prio_list(wpa_s->conf);
1804         interworking_reconnect(wpa_s);
1805
1806         return 0;
1807
1808 fail:
1809         wpas_notify_network_removed(wpa_s, ssid);
1810         wpa_config_remove_network(wpa_s->conf, ssid->id);
1811         nai_realm_free(realm, count);
1812         return -1;
1813 }
1814
1815
1816 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1817 {
1818         return interworking_connect_helper(wpa_s, bss, 1);
1819 }
1820
1821
1822 #ifdef PCSC_FUNCS
1823 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1824 {
1825         size_t len;
1826
1827         if (wpa_s->imsi[0] && wpa_s->mnc_len)
1828                 return 0;
1829
1830         len = sizeof(wpa_s->imsi) - 1;
1831         if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1832                 scard_deinit(wpa_s->scard);
1833                 wpa_s->scard = NULL;
1834                 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1835                 return -1;
1836         }
1837         wpa_s->imsi[len] = '\0';
1838         wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1839         wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1840                    wpa_s->imsi, wpa_s->mnc_len);
1841
1842         return 0;
1843 }
1844 #endif /* PCSC_FUNCS */
1845
1846
1847 static struct wpa_cred * interworking_credentials_available_3gpp(
1848         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1849         int *excluded)
1850 {
1851         struct wpa_cred *selected = NULL;
1852 #ifdef INTERWORKING_3GPP
1853         struct wpa_cred *cred;
1854         int ret;
1855         int is_excluded = 0;
1856
1857         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1858                 wpa_msg(wpa_s, MSG_DEBUG,
1859                         "interworking-avail-3gpp: not avail, anqp: %p  anqp_3gpp: %p",
1860                         bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1861                 return NULL;
1862         }
1863
1864 #ifdef CONFIG_EAP_PROXY
1865         if (!wpa_s->imsi[0]) {
1866                 size_t len;
1867                 wpa_msg(wpa_s, MSG_DEBUG,
1868                         "Interworking: IMSI not available - try to read again through eap_proxy");
1869                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1870                                                              wpa_s->imsi,
1871                                                              &len);
1872                 if (wpa_s->mnc_len > 0) {
1873                         wpa_s->imsi[len] = '\0';
1874                         wpa_msg(wpa_s, MSG_DEBUG,
1875                                 "eap_proxy: IMSI %s (MNC length %d)",
1876                                 wpa_s->imsi, wpa_s->mnc_len);
1877                 } else {
1878                         wpa_msg(wpa_s, MSG_DEBUG,
1879                                 "eap_proxy: IMSI not available");
1880                 }
1881         }
1882 #endif /* CONFIG_EAP_PROXY */
1883
1884         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1885                 char *sep;
1886                 const char *imsi;
1887                 int mnc_len;
1888                 char imsi_buf[16];
1889                 size_t msin_len;
1890
1891 #ifdef PCSC_FUNCS
1892                 if (cred->pcsc && wpa_s->scard) {
1893                         if (interworking_pcsc_read_imsi(wpa_s) < 0)
1894                                 continue;
1895                         imsi = wpa_s->imsi;
1896                         mnc_len = wpa_s->mnc_len;
1897                         goto compare;
1898                 }
1899 #endif /* PCSC_FUNCS */
1900 #ifdef CONFIG_EAP_PROXY
1901                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1902                         imsi = wpa_s->imsi;
1903                         mnc_len = wpa_s->mnc_len;
1904                         goto compare;
1905                 }
1906 #endif /* CONFIG_EAP_PROXY */
1907
1908                 if (cred->imsi == NULL || !cred->imsi[0] ||
1909                     (!wpa_s->conf->external_sim &&
1910                      (cred->milenage == NULL || !cred->milenage[0])))
1911                         continue;
1912
1913                 sep = os_strchr(cred->imsi, '-');
1914                 if (sep == NULL ||
1915                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1916                         continue;
1917                 mnc_len = sep - cred->imsi - 3;
1918                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1919                 sep++;
1920                 msin_len = os_strlen(cred->imsi);
1921                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1922                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1923                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1924                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1925                 imsi = imsi_buf;
1926
1927 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1928         compare:
1929 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1930                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1931                            MACSTR, MAC2STR(bss->bssid));
1932                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1933                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1934                 if (ret) {
1935                         if (cred_no_required_oi_match(cred, bss))
1936                                 continue;
1937                         if (!ignore_bw &&
1938                             cred_below_min_backhaul(wpa_s, cred, bss))
1939                                 continue;
1940                         if (!ignore_bw &&
1941                             cred_over_max_bss_load(wpa_s, cred, bss))
1942                                 continue;
1943                         if (!ignore_bw &&
1944                             cred_conn_capab_missing(wpa_s, cred, bss))
1945                                 continue;
1946                         if (cred_excluded_ssid(cred, bss)) {
1947                                 if (excluded == NULL)
1948                                         continue;
1949                                 if (selected == NULL) {
1950                                         selected = cred;
1951                                         is_excluded = 1;
1952                                 }
1953                         } else {
1954                                 if (selected == NULL || is_excluded ||
1955                                     cred_prio_cmp(selected, cred) < 0) {
1956                                         selected = cred;
1957                                         is_excluded = 0;
1958                                 }
1959                         }
1960                 }
1961         }
1962
1963         if (excluded)
1964                 *excluded = is_excluded;
1965 #endif /* INTERWORKING_3GPP */
1966         return selected;
1967 }
1968
1969
1970 static struct wpa_cred * interworking_credentials_available_realm(
1971         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1972         int *excluded)
1973 {
1974         struct wpa_cred *cred, *selected = NULL;
1975         struct nai_realm *realm;
1976         u16 count, i;
1977         int is_excluded = 0;
1978
1979         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1980                 return NULL;
1981
1982         if (wpa_s->conf->cred == NULL)
1983                 return NULL;
1984
1985         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1986                    MACSTR, MAC2STR(bss->bssid));
1987         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1988         if (realm == NULL) {
1989                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1990                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1991                 return NULL;
1992         }
1993
1994         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1995                 if (cred->realm == NULL)
1996                         continue;
1997
1998                 for (i = 0; i < count; i++) {
1999                         if (!nai_realm_match(&realm[i], cred->realm))
2000                                 continue;
2001                         if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2002                                 if (cred_no_required_oi_match(cred, bss))
2003                                         continue;
2004                                 if (!ignore_bw &&
2005                                     cred_below_min_backhaul(wpa_s, cred, bss))
2006                                         continue;
2007                                 if (!ignore_bw &&
2008                                     cred_over_max_bss_load(wpa_s, cred, bss))
2009                                         continue;
2010                                 if (!ignore_bw &&
2011                                     cred_conn_capab_missing(wpa_s, cred, bss))
2012                                         continue;
2013                                 if (cred_excluded_ssid(cred, bss)) {
2014                                         if (excluded == NULL)
2015                                                 continue;
2016                                         if (selected == NULL) {
2017                                                 selected = cred;
2018                                                 is_excluded = 1;
2019                                         }
2020                                 } else {
2021                                         if (selected == NULL || is_excluded ||
2022                                             cred_prio_cmp(selected, cred) < 0)
2023                                         {
2024                                                 selected = cred;
2025                                                 is_excluded = 0;
2026                                         }
2027                                 }
2028                                 break;
2029                         }
2030                 }
2031         }
2032
2033         nai_realm_free(realm, count);
2034
2035         if (excluded)
2036                 *excluded = is_excluded;
2037
2038         return selected;
2039 }
2040
2041
2042 static struct wpa_cred * interworking_credentials_available_helper(
2043         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2044         int *excluded)
2045 {
2046         struct wpa_cred *cred, *cred2;
2047         int excluded1, excluded2;
2048
2049         if (disallowed_bssid(wpa_s, bss->bssid) ||
2050             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2051                 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2052                            MACSTR, MAC2STR(bss->bssid));
2053                 return NULL;
2054         }
2055
2056         cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2057                                                         &excluded1);
2058         cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2059                                                         &excluded2);
2060         if (cred && cred2 &&
2061             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2062                 cred = cred2;
2063                 excluded1 = excluded2;
2064         }
2065         if (!cred) {
2066                 cred = cred2;
2067                 excluded1 = excluded2;
2068         }
2069
2070         cred2 = interworking_credentials_available_roaming_consortium(
2071                 wpa_s, bss, ignore_bw, &excluded2);
2072         if (cred && cred2 &&
2073             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2074                 cred = cred2;
2075                 excluded1 = excluded2;
2076         }
2077         if (!cred) {
2078                 cred = cred2;
2079                 excluded1 = excluded2;
2080         }
2081
2082         if (excluded)
2083                 *excluded = excluded1;
2084         return cred;
2085 }
2086
2087
2088 static struct wpa_cred * interworking_credentials_available(
2089         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2090 {
2091         struct wpa_cred *cred;
2092
2093         if (excluded)
2094                 *excluded = 0;
2095         cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2096                                                          excluded);
2097         if (cred)
2098                 return cred;
2099         return interworking_credentials_available_helper(wpa_s, bss, 1,
2100                                                          excluded);
2101 }
2102
2103
2104 int domain_name_list_contains(struct wpabuf *domain_names,
2105                               const char *domain, int exact_match)
2106 {
2107         const u8 *pos, *end;
2108         size_t len;
2109
2110         len = os_strlen(domain);
2111         pos = wpabuf_head(domain_names);
2112         end = pos + wpabuf_len(domain_names);
2113
2114         while (pos + 1 < end) {
2115                 if (pos + 1 + pos[0] > end)
2116                         break;
2117
2118                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2119                                   pos + 1, pos[0]);
2120                 if (pos[0] == len &&
2121                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
2122                         return 1;
2123                 if (!exact_match && pos[0] > len && pos[pos[0] - len] == '.') {
2124                         const char *ap = (const char *) (pos + 1);
2125                         int offset = pos[0] - len;
2126                         if (os_strncasecmp(domain, ap + offset, len) == 0)
2127                                 return 1;
2128                 }
2129
2130                 pos += 1 + pos[0];
2131         }
2132
2133         return 0;
2134 }
2135
2136
2137 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2138                               struct wpa_cred *cred,
2139                               struct wpabuf *domain_names)
2140 {
2141         size_t i;
2142         int ret = -1;
2143 #ifdef INTERWORKING_3GPP
2144         char nai[100], *realm;
2145
2146         char *imsi = NULL;
2147         int mnc_len = 0;
2148         if (cred->imsi)
2149                 imsi = cred->imsi;
2150 #ifdef PCSC_FUNCS
2151         else if (cred->pcsc && wpa_s->scard) {
2152                 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2153                         return -1;
2154                 imsi = wpa_s->imsi;
2155                 mnc_len = wpa_s->mnc_len;
2156         }
2157 #endif /* PCSC_FUNCS */
2158 #ifdef CONFIG_EAP_PROXY
2159         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2160                 imsi = wpa_s->imsi;
2161                 mnc_len = wpa_s->mnc_len;
2162         }
2163 #endif /* CONFIG_EAP_PROXY */
2164         if (domain_names &&
2165             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2166                 realm = os_strchr(nai, '@');
2167                 if (realm)
2168                         realm++;
2169                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
2170                            "with SIM/USIM domain %s", realm);
2171                 if (realm &&
2172                     domain_name_list_contains(domain_names, realm, 1))
2173                         return 1;
2174                 if (realm)
2175                         ret = 0;
2176         }
2177 #endif /* INTERWORKING_3GPP */
2178
2179         if (domain_names == NULL || cred->domain == NULL)
2180                 return ret;
2181
2182         for (i = 0; i < cred->num_domain; i++) {
2183                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
2184                            "home SP FQDN %s", cred->domain[i]);
2185                 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2186                         return 1;
2187         }
2188
2189         return 0;
2190 }
2191
2192
2193 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2194                                 struct wpabuf *domain_names)
2195 {
2196         struct wpa_cred *cred;
2197
2198         if (domain_names == NULL || wpa_s->conf->cred == NULL)
2199                 return -1;
2200
2201         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2202                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2203                 if (res)
2204                         return res;
2205         }
2206
2207         return 0;
2208 }
2209
2210
2211 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2212 {
2213         struct wpa_bss *bss;
2214         struct wpa_ssid *ssid;
2215
2216         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2217                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2218                         if (wpas_network_disabled(wpa_s, ssid) ||
2219                             ssid->mode != WPAS_MODE_INFRA)
2220                                 continue;
2221                         if (ssid->ssid_len != bss->ssid_len ||
2222                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2223                             0)
2224                                 continue;
2225                         /*
2226                          * TODO: Consider more accurate matching of security
2227                          * configuration similarly to what is done in events.c
2228                          */
2229                         return 1;
2230                 }
2231         }
2232
2233         return 0;
2234 }
2235
2236
2237 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2238                                  struct roaming_partner *partner,
2239                                  struct wpabuf *domain_names)
2240 {
2241         wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2242                    partner->fqdn, partner->exact_match, partner->priority,
2243                    partner->country);
2244         wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2245                           wpabuf_head(domain_names),
2246                           wpabuf_len(domain_names));
2247         if (!domain_name_list_contains(domain_names, partner->fqdn,
2248                                        partner->exact_match))
2249                 return 0;
2250         /* TODO: match Country */
2251         return 1;
2252 }
2253
2254
2255 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2256                        struct wpa_bss *bss)
2257 {
2258         size_t i;
2259
2260         if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2261                 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2262                 return 128; /* cannot check preference with domain name */
2263         }
2264
2265         if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2266         {
2267                 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2268                 return 0; /* max preference for home SP network */
2269         }
2270
2271         for (i = 0; i < cred->num_roaming_partner; i++) {
2272                 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2273                                           bss->anqp->domain_name)) {
2274                         wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2275                                    cred->roaming_partner[i].priority);
2276                         return cred->roaming_partner[i].priority;
2277                 }
2278         }
2279
2280         wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2281         return 128;
2282 }
2283
2284
2285 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2286                                                   struct wpa_bss *selected,
2287                                                   struct wpa_cred *cred)
2288 {
2289         struct wpa_bss *bss;
2290         u8 best_prio, prio;
2291         struct wpa_cred *cred2;
2292
2293         /*
2294          * Check if any other BSS is operated by a more preferred roaming
2295          * partner.
2296          */
2297
2298         best_prio = roaming_prio(wpa_s, cred, selected);
2299         wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2300                    MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2301                    cred->id);
2302
2303         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2304                 if (bss == selected)
2305                         continue;
2306                 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2307                 if (!cred2)
2308                         continue;
2309                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2310                         continue;
2311                 prio = roaming_prio(wpa_s, cred2, bss);
2312                 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2313                            MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2314                            cred2->id);
2315                 if (prio < best_prio) {
2316                         int bh1, bh2, load1, load2, conn1, conn2;
2317                         bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2318                         load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2319                         conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2320                         bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2321                         load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2322                         conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2323                         wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d  new: %d %d %d",
2324                                    bh1, load1, conn1, bh2, load2, conn2);
2325                         if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2326                                 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2327                                 best_prio = prio;
2328                                 selected = bss;
2329                         }
2330                 }
2331         }
2332
2333         return selected;
2334 }
2335
2336
2337 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2338 {
2339         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2340         struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2341         unsigned int count = 0;
2342         const char *type;
2343         int res;
2344         struct wpa_cred *cred, *selected_cred = NULL;
2345         struct wpa_cred *selected_home_cred = NULL;
2346         struct wpa_cred *selected2_cred = NULL;
2347         struct wpa_cred *selected2_home_cred = NULL;
2348
2349         wpa_s->network_select = 0;
2350
2351         wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2352                    wpa_s->auto_select);
2353         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2354                 int excluded = 0;
2355                 int bh, bss_load, conn_capab;
2356                 cred = interworking_credentials_available(wpa_s, bss,
2357                                                           &excluded);
2358                 if (!cred)
2359                         continue;
2360                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2361                         /*
2362                          * We currently support only HS 2.0 networks and those
2363                          * are required to use WPA2-Enterprise.
2364                          */
2365                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
2366                                    "with " MACSTR " but network does not use "
2367                                    "RSN", MAC2STR(bss->bssid));
2368                         continue;
2369                 }
2370                 if (!excluded)
2371                         count++;
2372                 res = interworking_home_sp(wpa_s, bss->anqp ?
2373                                            bss->anqp->domain_name : NULL);
2374                 if (res > 0)
2375                         type = "home";
2376                 else if (res == 0)
2377                         type = "roaming";
2378                 else
2379                         type = "unknown";
2380                 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2381                 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2382                 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2383                 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2384                         excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2385                         MAC2STR(bss->bssid), type,
2386                         bh ? " below_min_backhaul=1" : "",
2387                         bss_load ? " over_max_bss_load=1" : "",
2388                         conn_capab ? " conn_capab_missing=1" : "",
2389                         cred->id, cred->priority, cred->sp_priority);
2390                 if (excluded)
2391                         continue;
2392                 if (wpa_s->auto_select ||
2393                     (wpa_s->conf->auto_interworking &&
2394                      wpa_s->auto_network_select)) {
2395                         if (bh || bss_load || conn_capab) {
2396                                 if (selected2_cred == NULL ||
2397                                     cred_prio_cmp(cred, selected2_cred) > 0) {
2398                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2399                                         selected2 = bss;
2400                                         selected2_cred = cred;
2401                                 }
2402                                 if (res > 0 &&
2403                                     (selected2_home_cred == NULL ||
2404                                      cred_prio_cmp(cred, selected2_home_cred) >
2405                                      0)) {
2406                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2407                                         selected2_home = bss;
2408                                         selected2_home_cred = cred;
2409                                 }
2410                         } else {
2411                                 if (selected_cred == NULL ||
2412                                     cred_prio_cmp(cred, selected_cred) > 0) {
2413                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2414                                         selected = bss;
2415                                         selected_cred = cred;
2416                                 }
2417                                 if (res > 0 &&
2418                                     (selected_home_cred == NULL ||
2419                                      cred_prio_cmp(cred, selected_home_cred) >
2420                                      0)) {
2421                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2422                                         selected_home = bss;
2423                                         selected_home_cred = cred;
2424                                 }
2425                         }
2426                 }
2427         }
2428
2429         if (selected_home && selected_home != selected &&
2430             selected_home_cred &&
2431             (selected_cred == NULL ||
2432              cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2433                 /* Prefer network operated by the Home SP */
2434                 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2435                 selected = selected_home;
2436                 selected_cred = selected_home_cred;
2437         }
2438
2439         if (!selected) {
2440                 if (selected2_home) {
2441                         wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2442                         selected = selected2_home;
2443                         selected_cred = selected2_home_cred;
2444                 } else if (selected2) {
2445                         wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2446                         selected = selected2;
2447                         selected_cred = selected2_cred;
2448                 }
2449         }
2450
2451         if (count == 0) {
2452                 /*
2453                  * No matching network was found based on configured
2454                  * credentials. Check whether any of the enabled network blocks
2455                  * have matching APs.
2456                  */
2457                 if (interworking_find_network_match(wpa_s)) {
2458                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
2459                                    "match for enabled network configurations");
2460                         if (wpa_s->auto_select) {
2461                                 interworking_reconnect(wpa_s);
2462                                 return;
2463                         }
2464                 }
2465
2466                 if (wpa_s->auto_network_select) {
2467                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
2468                                    "scanning after ANQP fetch");
2469                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2470                                                 0);
2471                         return;
2472                 }
2473
2474                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2475                         "with matching credentials found");
2476         }
2477
2478         if (selected) {
2479                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2480                            MAC2STR(selected->bssid));
2481                 selected = pick_best_roaming_partner(wpa_s, selected,
2482                                                      selected_cred);
2483                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2484                            " (after best roaming partner selection)",
2485                            MAC2STR(selected->bssid));
2486                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2487                         MAC2STR(selected->bssid));
2488                 interworking_connect(wpa_s, selected);
2489         }
2490 }
2491
2492
2493 static struct wpa_bss_anqp *
2494 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2495 {
2496         struct wpa_bss *other;
2497
2498         if (is_zero_ether_addr(bss->hessid))
2499                 return NULL; /* Cannot be in the same homegenous ESS */
2500
2501         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2502                 if (other == bss)
2503                         continue;
2504                 if (other->anqp == NULL)
2505                         continue;
2506                 if (other->anqp->roaming_consortium == NULL &&
2507                     other->anqp->nai_realm == NULL &&
2508                     other->anqp->anqp_3gpp == NULL &&
2509                     other->anqp->domain_name == NULL)
2510                         continue;
2511                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2512                         continue;
2513                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2514                         continue;
2515                 if (bss->ssid_len != other->ssid_len ||
2516                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2517                         continue;
2518
2519                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
2520                            "already fetched BSSID " MACSTR " and " MACSTR,
2521                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
2522                 other->anqp->users++;
2523                 return other->anqp;
2524         }
2525
2526         return NULL;
2527 }
2528
2529
2530 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2531 {
2532         struct wpa_bss *bss;
2533         int found = 0;
2534         const u8 *ie;
2535
2536         wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2537                    "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2538                    wpa_s->fetch_anqp_in_progress,
2539                    wpa_s->fetch_osu_icon_in_progress);
2540
2541         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2542                 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2543                 return;
2544         }
2545
2546         if (wpa_s->fetch_osu_icon_in_progress) {
2547                 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2548                 hs20_next_osu_icon(wpa_s);
2549                 return;
2550         }
2551
2552         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2553                 if (!(bss->caps & IEEE80211_CAP_ESS))
2554                         continue;
2555                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2556                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2557                         continue; /* AP does not support Interworking */
2558                 if (disallowed_bssid(wpa_s, bss->bssid) ||
2559                     disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2560                         continue; /* Disallowed BSS */
2561
2562                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2563                         if (bss->anqp == NULL) {
2564                                 bss->anqp = interworking_match_anqp_info(wpa_s,
2565                                                                          bss);
2566                                 if (bss->anqp) {
2567                                         /* Shared data already fetched */
2568                                         continue;
2569                                 }
2570                                 bss->anqp = wpa_bss_anqp_alloc();
2571                                 if (bss->anqp == NULL)
2572                                         break;
2573                         }
2574                         found++;
2575                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2576                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2577                                 MACSTR, MAC2STR(bss->bssid));
2578                         interworking_anqp_send_req(wpa_s, bss);
2579                         break;
2580                 }
2581         }
2582
2583         if (found == 0) {
2584                 if (wpa_s->fetch_osu_info) {
2585                         if (wpa_s->num_prov_found == 0 &&
2586                             wpa_s->fetch_osu_waiting_scan &&
2587                             wpa_s->num_osu_scans < 3) {
2588                                 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2589                                 hs20_start_osu_scan(wpa_s);
2590                                 return;
2591                         }
2592                         wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2593                         hs20_osu_icon_fetch(wpa_s);
2594                         return;
2595                 }
2596                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2597                 wpa_s->fetch_anqp_in_progress = 0;
2598                 if (wpa_s->network_select)
2599                         interworking_select_network(wpa_s);
2600         }
2601 }
2602
2603
2604 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2605 {
2606         struct wpa_bss *bss;
2607
2608         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2609                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2610
2611         wpa_s->fetch_anqp_in_progress = 1;
2612
2613         /*
2614          * Start actual ANQP operation from eloop call to make sure the loop
2615          * does not end up using excessive recursion.
2616          */
2617         eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2618 }
2619
2620
2621 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2622 {
2623         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2624                 return 0;
2625
2626         wpa_s->network_select = 0;
2627         wpa_s->fetch_all_anqp = 1;
2628         wpa_s->fetch_osu_info = 0;
2629
2630         interworking_start_fetch_anqp(wpa_s);
2631
2632         return 0;
2633 }
2634
2635
2636 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2637 {
2638         if (!wpa_s->fetch_anqp_in_progress)
2639                 return;
2640
2641         wpa_s->fetch_anqp_in_progress = 0;
2642 }
2643
2644
2645 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2646                   u16 info_ids[], size_t num_ids, u32 subtypes)
2647 {
2648         struct wpabuf *buf;
2649         struct wpabuf *hs20_buf = NULL;
2650         int ret = 0;
2651         int freq;
2652         struct wpa_bss *bss;
2653         int res;
2654
2655         freq = wpa_s->assoc_freq;
2656         bss = wpa_bss_get_bssid(wpa_s, dst);
2657         if (bss) {
2658                 wpa_bss_anqp_unshare_alloc(bss);
2659                 freq = bss->freq;
2660         }
2661         if (freq <= 0)
2662                 return -1;
2663
2664         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
2665                    MAC2STR(dst), (unsigned int) num_ids);
2666
2667 #ifdef CONFIG_HS20
2668         if (subtypes != 0) {
2669                 hs20_buf = wpabuf_alloc(100);
2670                 if (hs20_buf == NULL)
2671                         return -1;
2672                 hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf);
2673         }
2674 #endif /* CONFIG_HS20 */
2675
2676         buf = anqp_build_req(info_ids, num_ids, hs20_buf);
2677         wpabuf_free(hs20_buf);
2678         if (buf == NULL)
2679                 return -1;
2680
2681         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2682         if (res < 0) {
2683                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
2684                 wpabuf_free(buf);
2685                 ret = -1;
2686         } else
2687                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
2688                            "%u", res);
2689
2690         return ret;
2691 }
2692
2693
2694 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2695                                             struct wpa_bss *bss, const u8 *sa,
2696                                             u16 info_id,
2697                                             const u8 *data, size_t slen)
2698 {
2699         const u8 *pos = data;
2700         struct wpa_bss_anqp *anqp = NULL;
2701 #ifdef CONFIG_HS20
2702         u8 type;
2703 #endif /* CONFIG_HS20 */
2704
2705         if (bss)
2706                 anqp = bss->anqp;
2707
2708         switch (info_id) {
2709         case ANQP_CAPABILITY_LIST:
2710                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2711                         " ANQP Capability list", MAC2STR(sa));
2712                 break;
2713         case ANQP_VENUE_NAME:
2714                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2715                         " Venue Name", MAC2STR(sa));
2716                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2717                 if (anqp) {
2718                         wpabuf_free(anqp->venue_name);
2719                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2720                 }
2721                 break;
2722         case ANQP_NETWORK_AUTH_TYPE:
2723                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2724                         " Network Authentication Type information",
2725                         MAC2STR(sa));
2726                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2727                                   "Type", pos, slen);
2728                 if (anqp) {
2729                         wpabuf_free(anqp->network_auth_type);
2730                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2731                 }
2732                 break;
2733         case ANQP_ROAMING_CONSORTIUM:
2734                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2735                         " Roaming Consortium list", MAC2STR(sa));
2736                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2737                                   pos, slen);
2738                 if (anqp) {
2739                         wpabuf_free(anqp->roaming_consortium);
2740                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2741                 }
2742                 break;
2743         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2744                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2745                         " IP Address Type Availability information",
2746                         MAC2STR(sa));
2747                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2748                             pos, slen);
2749                 if (anqp) {
2750                         wpabuf_free(anqp->ip_addr_type_availability);
2751                         anqp->ip_addr_type_availability =
2752                                 wpabuf_alloc_copy(pos, slen);
2753                 }
2754                 break;
2755         case ANQP_NAI_REALM:
2756                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2757                         " NAI Realm list", MAC2STR(sa));
2758                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2759                 if (anqp) {
2760                         wpabuf_free(anqp->nai_realm);
2761                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2762                 }
2763                 break;
2764         case ANQP_3GPP_CELLULAR_NETWORK:
2765                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2766                         " 3GPP Cellular Network information", MAC2STR(sa));
2767                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2768                                   pos, slen);
2769                 if (anqp) {
2770                         wpabuf_free(anqp->anqp_3gpp);
2771                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2772                 }
2773                 break;
2774         case ANQP_DOMAIN_NAME:
2775                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2776                         " Domain Name list", MAC2STR(sa));
2777                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2778                 if (anqp) {
2779                         wpabuf_free(anqp->domain_name);
2780                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2781                 }
2782                 break;
2783         case ANQP_VENDOR_SPECIFIC:
2784                 if (slen < 3)
2785                         return;
2786
2787                 switch (WPA_GET_BE24(pos)) {
2788 #ifdef CONFIG_HS20
2789                 case OUI_WFA:
2790                         pos += 3;
2791                         slen -= 3;
2792
2793                         if (slen < 1)
2794                                 return;
2795                         type = *pos++;
2796                         slen--;
2797
2798                         switch (type) {
2799                         case HS20_ANQP_OUI_TYPE:
2800                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2801                                                              pos, slen);
2802                                 break;
2803                         default:
2804                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
2805                                            "vendor type %u", type);
2806                                 break;
2807                         }
2808                         break;
2809 #endif /* CONFIG_HS20 */
2810                 default:
2811                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
2812                                    "vendor-specific ANQP OUI %06x",
2813                                    WPA_GET_BE24(pos));
2814                         return;
2815                 }
2816                 break;
2817         default:
2818                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
2819                            "%u", info_id);
2820                 break;
2821         }
2822 }
2823
2824
2825 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2826                   enum gas_query_result result,
2827                   const struct wpabuf *adv_proto,
2828                   const struct wpabuf *resp, u16 status_code)
2829 {
2830         struct wpa_supplicant *wpa_s = ctx;
2831         const u8 *pos;
2832         const u8 *end;
2833         u16 info_id;
2834         u16 slen;
2835         struct wpa_bss *bss = NULL, *tmp;
2836         const char *anqp_result = "SUCCESS";
2837
2838         wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2839                    " dialog_token=%u result=%d status_code=%u",
2840                    MAC2STR(dst), dialog_token, result, status_code);
2841         if (result != GAS_QUERY_SUCCESS) {
2842                 if (wpa_s->fetch_osu_icon_in_progress)
2843                         hs20_icon_fetch_failed(wpa_s);
2844                 anqp_result = "FAILURE";
2845                 goto out;
2846         }
2847
2848         pos = wpabuf_head(adv_proto);
2849         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2850             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2851                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
2852                            "Protocol in response");
2853                 if (wpa_s->fetch_osu_icon_in_progress)
2854                         hs20_icon_fetch_failed(wpa_s);
2855                 anqp_result = "INVALID_FRAME";
2856                 goto out;
2857         }
2858
2859         /*
2860          * If possible, select the BSS entry based on which BSS entry was used
2861          * for the request. This can help in cases where multiple BSS entries
2862          * may exist for the same AP.
2863          */
2864         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2865                 if (tmp == wpa_s->interworking_gas_bss &&
2866                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2867                         bss = tmp;
2868                         break;
2869                 }
2870         }
2871         if (bss == NULL)
2872                 bss = wpa_bss_get_bssid(wpa_s, dst);
2873
2874         pos = wpabuf_head(resp);
2875         end = pos + wpabuf_len(resp);
2876
2877         while (pos < end) {
2878                 unsigned int left = end - pos;
2879
2880                 if (left < 4) {
2881                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
2882                         anqp_result = "INVALID_FRAME";
2883                         goto out_parse_done;
2884                 }
2885                 info_id = WPA_GET_LE16(pos);
2886                 pos += 2;
2887                 slen = WPA_GET_LE16(pos);
2888                 pos += 2;
2889                 left -= 4;
2890                 if (left < slen) {
2891                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
2892                                    "for Info ID %u", info_id);
2893                         anqp_result = "INVALID_FRAME";
2894                         goto out_parse_done;
2895                 }
2896                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2897                                                 slen);
2898                 pos += slen;
2899         }
2900
2901 out_parse_done:
2902         hs20_notify_parse_done(wpa_s);
2903 out:
2904         wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
2905                 MAC2STR(dst), anqp_result);
2906 }
2907
2908
2909 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2910                                           struct wpa_scan_results *scan_res)
2911 {
2912         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2913                    "ANQP fetch");
2914         interworking_start_fetch_anqp(wpa_s);
2915 }
2916
2917
2918 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
2919                         int *freqs)
2920 {
2921         interworking_stop_fetch_anqp(wpa_s);
2922         wpa_s->network_select = 1;
2923         wpa_s->auto_network_select = 0;
2924         wpa_s->auto_select = !!auto_select;
2925         wpa_s->fetch_all_anqp = 0;
2926         wpa_s->fetch_osu_info = 0;
2927         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2928                    "selection");
2929         wpa_s->scan_res_handler = interworking_scan_res_handler;
2930         wpa_s->normal_scans = 0;
2931         wpa_s->scan_req = MANUAL_SCAN_REQ;
2932         os_free(wpa_s->manual_scan_freqs);
2933         wpa_s->manual_scan_freqs = freqs;
2934         wpa_s->after_wps = 0;
2935         wpa_s->known_wps_freq = 0;
2936         wpa_supplicant_req_scan(wpa_s, 0, 0);
2937
2938         return 0;
2939 }
2940
2941
2942 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2943                         enum gas_query_result result,
2944                         const struct wpabuf *adv_proto,
2945                         const struct wpabuf *resp, u16 status_code)
2946 {
2947         struct wpa_supplicant *wpa_s = ctx;
2948         struct wpabuf *n;
2949
2950         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2951                 " dialog_token=%d status_code=%d resp_len=%d",
2952                 MAC2STR(addr), dialog_token, status_code,
2953                 resp ? (int) wpabuf_len(resp) : -1);
2954         if (!resp)
2955                 return;
2956
2957         n = wpabuf_dup(resp);
2958         if (n == NULL)
2959                 return;
2960         wpabuf_free(wpa_s->prev_gas_resp);
2961         wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
2962         os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
2963         wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
2964         wpa_s->last_gas_resp = n;
2965         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2966         wpa_s->last_gas_dialog_token = dialog_token;
2967 }
2968
2969
2970 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2971                      const struct wpabuf *adv_proto,
2972                      const struct wpabuf *query)
2973 {
2974         struct wpabuf *buf;
2975         int ret = 0;
2976         int freq;
2977         struct wpa_bss *bss;
2978         int res;
2979         size_t len;
2980         u8 query_resp_len_limit = 0;
2981
2982         freq = wpa_s->assoc_freq;
2983         bss = wpa_bss_get_bssid(wpa_s, dst);
2984         if (bss)
2985                 freq = bss->freq;
2986         if (freq <= 0)
2987                 return -1;
2988
2989         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2990                    MAC2STR(dst), freq);
2991         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2992         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2993
2994         len = 3 + wpabuf_len(adv_proto) + 2;
2995         if (query)
2996                 len += wpabuf_len(query);
2997         buf = gas_build_initial_req(0, len);
2998         if (buf == NULL)
2999                 return -1;
3000
3001         /* Advertisement Protocol IE */
3002         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3003         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3004         wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3005         wpabuf_put_buf(buf, adv_proto);
3006
3007         /* GAS Query */
3008         if (query) {
3009                 wpabuf_put_le16(buf, wpabuf_len(query));
3010                 wpabuf_put_buf(buf, query);
3011         } else
3012                 wpabuf_put_le16(buf, 0);
3013
3014         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3015         if (res < 0) {
3016                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
3017                 wpabuf_free(buf);
3018                 ret = -1;
3019         } else
3020                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
3021                            "%u", res);
3022
3023         return ret;
3024 }