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