wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
   4  * Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
   5  *
   6  * This software may be distributed under the terms of the BSD license.
   7  * See README for more details.
   8  */
   9
  10 #include "includes.h"
  11
  12 #include "common.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/gas.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "utils/pcsc_funcs.h"
  17 #include "utils/eloop.h"
  18 #include "drivers/driver.h"
  19 #include "eap_common/eap_defs.h"
  20 #include "eap_peer/eap.h"
  21 #include "eap_peer/eap_methods.h"
  22 #include "eapol_supp/eapol_supp_sm.h"
  23 #include "rsn_supp/wpa.h"
  24 #include "wpa_supplicant_i.h"
  25 #include "config.h"
  26 #include "config_ssid.h"
  27 #include "bss.h"
  28 #include "scan.h"
  29 #include "notify.h"
  30 #include "driver_i.h"
  31 #include "gas_query.h"
  32 #include "hs20_supplicant.h"
  33 #include "interworking.h"
  34
  35
  36 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  37 #define INTERWORKING_3GPP
  38 #else
  39 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  40 #define INTERWORKING_3GPP
  41 #else
  42 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  43 #define INTERWORKING_3GPP
  44 #endif
  45 #endif
  46 #endif
  47
  48 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  49 static struct wpa_cred * interworking_credentials_available_realm(
  50         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
  51         int *excluded);
  52 static struct wpa_cred * interworking_credentials_available_3gpp(
  53         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
  54         int *excluded);
  55
  56
  57 static int cred_prio_cmp(const struct wpa_cred *a, const struct wpa_cred *b)
  58 {
  59         if (a->priority > b->priority)
  60                 return 1;
  61         if (a->priority < b->priority)
  62                 return -1;
  63         if (a->provisioning_sp == NULL || b->provisioning_sp == NULL ||
  64             os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0)
  65                 return 0;
  66         if (a->sp_priority < b->sp_priority)
  67                 return 1;
  68         if (a->sp_priority > b->sp_priority)
  69                 return -1;
  70         return 0;
  71 }
  72
  73
  74 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  75 {
  76         unsigned int tried;
  77
  78         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  79                 wpa_supplicant_cancel_sched_scan(wpa_s);
  80                 wpa_s->own_disconnect_req = 1;
  81                 wpa_supplicant_deauthenticate(wpa_s,
  82                                               WLAN_REASON_DEAUTH_LEAVING);
  83         }
  84         wpa_s->disconnected = 0;
  85         wpa_s->reassociate = 1;
  86         tried = wpa_s->interworking_fast_assoc_tried;
  87         wpa_s->interworking_fast_assoc_tried = 1;
  88
  89         if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0)
  90                 return;
  91
  92         wpa_s->interworking_fast_assoc_tried = 0;
  93         wpa_supplicant_req_scan(wpa_s, 0, 0);
  94 }
  95
  96
  97 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  98                                       struct wpabuf *extra)
  99 {
 100         struct wpabuf *buf;
 101         size_t i;
 102         u8 *len_pos;
 103
 104         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
 105                                          (extra ? wpabuf_len(extra) : 0));
 106         if (buf == NULL)
 107                 return NULL;
 108
 109         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
 110         for (i = 0; i < num_ids; i++)
 111                 wpabuf_put_le16(buf, info_ids[i]);
 112         gas_anqp_set_element_len(buf, len_pos);
 113         if (extra)
 114                 wpabuf_put_buf(buf, extra);
 115
 116         gas_anqp_set_len(buf);
 117
 118         return buf;
 119 }
 120
 121
 122 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
 123                                       u8 dialog_token,
 124                                       enum gas_query_result result,
 125                                       const struct wpabuf *adv_proto,
 126                                       const struct wpabuf *resp,
 127                                       u16 status_code)
 128 {
 129         struct wpa_supplicant *wpa_s = ctx;
 130
 131         wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
 132                    " dialog_token=%u result=%d status_code=%u",
 133                    MAC2STR(dst), dialog_token, result, status_code);
 134         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 135                      status_code);
 136         interworking_next_anqp_fetch(wpa_s);
 137 }
 138
 139
 140 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 141 {
 142         struct wpa_cred *cred;
 143
 144         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 145                 if (cred->roaming_consortium_len)
 146                         return 1;
 147                 if (cred->required_roaming_consortium_len)
 148                         return 1;
 149         }
 150         return 0;
 151 }
 152
 153
 154 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 155 {
 156         struct wpa_cred *cred;
 157
 158         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 159                 if (cred->pcsc || cred->imsi)
 160                         return 1;
 161         }
 162         return 0;
 163 }
 164
 165
 166 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 167 {
 168         struct wpa_cred *cred;
 169
 170         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 171                 if (cred->pcsc || cred->imsi)
 172                         continue;
 173                 if (!cred->eap_method)
 174                         return 1;
 175                 if (cred->realm && cred->roaming_consortium_len == 0)
 176                         return 1;
 177         }
 178         return 0;
 179 }
 180
 181
 182 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 183 {
 184         struct wpa_cred *cred;
 185
 186         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 187                 if (cred->domain || cred->pcsc || cred->imsi ||
 188                     cred->roaming_partner)
 189                         return 1;
 190         }
 191         return 0;
 192 }
 193
 194
 195 #ifdef CONFIG_HS20
 196
 197 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
 198 {
 199         struct wpa_cred *cred;
 200
 201         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 202                 if (cred->min_dl_bandwidth_home ||
 203                     cred->min_ul_bandwidth_home ||
 204                     cred->min_dl_bandwidth_roaming ||
 205                     cred->min_ul_bandwidth_roaming)
 206                         return 1;
 207         }
 208         return 0;
 209 }
 210
 211
 212 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
 213 {
 214         struct wpa_cred *cred;
 215
 216         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 217                 if (cred->num_req_conn_capab)
 218                         return 1;
 219         }
 220         return 0;
 221 }
 222
 223 #endif /* CONFIG_HS20 */
 224
 225
 226 static int additional_roaming_consortiums(struct wpa_bss *bss)
 227 {
 228         const u8 *ie;
 229         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 230         if (ie == NULL || ie[1] == 0)
 231                 return 0;
 232         return ie[2]; /* Number of ANQP OIs */
 233 }
 234
 235
 236 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 237 {
 238         struct wpa_supplicant *wpa_s = eloop_ctx;
 239         interworking_next_anqp_fetch(wpa_s);
 240 }
 241
 242
 243 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 244                                       struct wpa_bss *bss)
 245 {
 246         struct wpabuf *buf;
 247         int ret = 0;
 248         int res;
 249         u16 info_ids[8];
 250         size_t num_info_ids = 0;
 251         struct wpabuf *extra = NULL;
 252         int all = wpa_s->fetch_all_anqp;
 253
 254         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 255                 MAC2STR(bss->bssid));
 256         wpa_s->interworking_gas_bss = bss;
 257
 258         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 259         if (all) {
 260                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 261                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 262         }
 263         if (all || (cred_with_roaming_consortium(wpa_s) &&
 264                     additional_roaming_consortiums(bss)))
 265                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 266         if (all)
 267                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 268         if (all || cred_with_nai_realm(wpa_s))
 269                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 270         if (all || cred_with_3gpp(wpa_s)) {
 271                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 272                 wpa_supplicant_scard_init(wpa_s, NULL);
 273         }
 274         if (all || cred_with_domain(wpa_s))
 275                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 276         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 277                     (u8 *) info_ids, num_info_ids * 2);
 278
 279 #ifdef CONFIG_HS20
 280         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 281                 u8 *len_pos;
 282
 283                 extra = wpabuf_alloc(100);
 284                 if (!extra)
 285                         return -1;
 286
 287                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 288                 wpabuf_put_be24(extra, OUI_WFA);
 289                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 290                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 291                 wpabuf_put_u8(extra, 0); /* Reserved */
 292                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 293                 if (all)
 294                         wpabuf_put_u8(extra,
 295                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 296                 if (all || cred_with_min_backhaul(wpa_s))
 297                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 298                 if (all || cred_with_conn_capab(wpa_s))
 299                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 300                 if (all)
 301                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 302                 if (all)
 303                         wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
 304                 gas_anqp_set_element_len(extra, len_pos);
 305         }
 306 #endif /* CONFIG_HS20 */
 307
 308         buf = anqp_build_req(info_ids, num_info_ids, extra);
 309         wpabuf_free(extra);
 310         if (buf == NULL)
 311                 return -1;
 312
 313         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 314                             interworking_anqp_resp_cb, wpa_s);
 315         if (res < 0) {
 316                 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
 317                 wpabuf_free(buf);
 318                 ret = -1;
 319                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 320                                        NULL);
 321         } else
 322                 wpa_msg(wpa_s, MSG_DEBUG,
 323                         "ANQP: Query started with dialog token %u", res);
 324
 325         return ret;
 326 }
 327
 328
 329 struct nai_realm_eap {
 330         u8 method;
 331         u8 inner_method;
 332         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 333         u8 cred_type;
 334         u8 tunneled_cred_type;
 335 };
 336
 337 struct nai_realm {
 338         u8 encoding;
 339         char *realm;
 340         u8 eap_count;
 341         struct nai_realm_eap *eap;
 342 };
 343
 344
 345 static void nai_realm_free(struct nai_realm *realms, u16 count)
 346 {
 347         u16 i;
 348
 349         if (realms == NULL)
 350                 return;
 351         for (i = 0; i < count; i++) {
 352                 os_free(realms[i].eap);
 353                 os_free(realms[i].realm);
 354         }
 355         os_free(realms);
 356 }
 357
 358
 359 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 360                                       const u8 *end)
 361 {
 362         u8 elen, auth_count, a;
 363         const u8 *e_end;
 364
 365         if (end - pos < 3) {
 366                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 367                 return NULL;
 368         }
 369
 370         elen = *pos++;
 371         if (elen > end - pos || elen < 2) {
 372                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 373                 return NULL;
 374         }
 375         e_end = pos + elen;
 376         e->method = *pos++;
 377         auth_count = *pos++;
 378         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 379                    elen, e->method, auth_count);
 380
 381         for (a = 0; a < auth_count; a++) {
 382                 u8 id, len;
 383
 384                 if (end - pos < 2) {
 385                         wpa_printf(MSG_DEBUG,
 386                                    "No room for Authentication Parameter subfield header");
 387                         return NULL;
 388                 }
 389
 390                 id = *pos++;
 391                 len = *pos++;
 392                 if (len > end - pos) {
 393                         wpa_printf(MSG_DEBUG,
 394                                    "No room for Authentication Parameter subfield");
 395                         return NULL;
 396                 }
 397
 398                 switch (id) {
 399                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 400                         if (len < 1)
 401                                 break;
 402                         e->inner_non_eap = *pos;
 403                         if (e->method != EAP_TYPE_TTLS)
 404                                 break;
 405                         switch (*pos) {
 406                         case NAI_REALM_INNER_NON_EAP_PAP:
 407                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 408                                 break;
 409                         case NAI_REALM_INNER_NON_EAP_CHAP:
 410                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 411                                 break;
 412                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 413                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 414                                 break;
 415                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 416                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 417                                 break;
 418                         }
 419                         break;
 420                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 421                         if (len < 1)
 422                                 break;
 423                         e->inner_method = *pos;
 424                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 425                                    e->inner_method);
 426                         break;
 427                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 428                         if (len < 1)
 429                                 break;
 430                         e->cred_type = *pos;
 431                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 432                                    e->cred_type);
 433                         break;
 434                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 435                         if (len < 1)
 436                                 break;
 437                         e->tunneled_cred_type = *pos;
 438                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 439                                    "Type: %u", e->tunneled_cred_type);
 440                         break;
 441                 default:
 442                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 443                                    "Parameter: id=%u len=%u", id, len);
 444                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 445                                     "Value", pos, len);
 446                         break;
 447                 }
 448
 449                 pos += len;
 450         }
 451
 452         return e_end;
 453 }
 454
 455
 456 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 457                                         const u8 *end)
 458 {
 459         u16 len;
 460         const u8 *f_end;
 461         u8 realm_len, e;
 462
 463         if (end - pos < 4) {
 464                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 465                            "fixed fields");
 466                 return NULL;
 467         }
 468
 469         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 470         pos += 2;
 471         if (len > end - pos || len < 3) {
 472                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 473                            "(len=%u; left=%u)",
 474                            len, (unsigned int) (end - pos));
 475                 return NULL;
 476         }
 477         f_end = pos + len;
 478
 479         r->encoding = *pos++;
 480         realm_len = *pos++;
 481         if (realm_len > f_end - pos) {
 482                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 483                            "(len=%u; left=%u)",
 484                            realm_len, (unsigned int) (f_end - pos));
 485                 return NULL;
 486         }
 487         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 488         r->realm = dup_binstr(pos, realm_len);
 489         if (r->realm == NULL)
 490                 return NULL;
 491         pos += realm_len;
 492
 493         if (f_end - pos < 1) {
 494                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 495                 return NULL;
 496         }
 497         r->eap_count = *pos++;
 498         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 499         if (r->eap_count * 3 > f_end - pos) {
 500                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 501                 return NULL;
 502         }
 503         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 504         if (r->eap == NULL)
 505                 return NULL;
 506
 507         for (e = 0; e < r->eap_count; e++) {
 508                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 509                 if (pos == NULL)
 510                         return NULL;
 511         }
 512
 513         return f_end;
 514 }
 515
 516
 517 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 518 {
 519         struct nai_realm *realm;
 520         const u8 *pos, *end;
 521         u16 i, num;
 522         size_t left;
 523
 524         if (anqp == NULL)
 525                 return NULL;
 526         left = wpabuf_len(anqp);
 527         if (left < 2)
 528                 return NULL;
 529
 530         pos = wpabuf_head_u8(anqp);
 531         end = pos + left;
 532         num = WPA_GET_LE16(pos);
 533         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 534         pos += 2;
 535         left -= 2;
 536
 537         if (num > left / 5) {
 538                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 539                            "enough data (%u octets) for that many realms",
 540                            num, (unsigned int) left);
 541                 return NULL;
 542         }
 543
 544         realm = os_calloc(num, sizeof(struct nai_realm));
 545         if (realm == NULL)
 546                 return NULL;
 547
 548         for (i = 0; i < num; i++) {
 549                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 550                 if (pos == NULL) {
 551                         nai_realm_free(realm, num);
 552                         return NULL;
 553                 }
 554         }
 555
 556         *count = num;
 557         return realm;
 558 }
 559
 560
 561 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 562 {
 563         char *tmp, *pos, *end;
 564         int match = 0;
 565
 566         if (realm->realm == NULL || home_realm == NULL)
 567                 return 0;
 568
 569         if (os_strchr(realm->realm, ';') == NULL)
 570                 return os_strcasecmp(realm->realm, home_realm) == 0;
 571
 572         tmp = os_strdup(realm->realm);
 573         if (tmp == NULL)
 574                 return 0;
 575
 576         pos = tmp;
 577         while (*pos) {
 578                 end = os_strchr(pos, ';');
 579                 if (end)
 580                         *end = '\0';
 581                 if (os_strcasecmp(pos, home_realm) == 0) {
 582                         match = 1;
 583                         break;
 584                 }
 585                 if (end == NULL)
 586                         break;
 587                 pos = end + 1;
 588         }
 589
 590         os_free(tmp);
 591
 592         return match;
 593 }
 594
 595
 596 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
 597                                    struct nai_realm_eap *eap)
 598 {
 599         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
 600                 wpa_msg(wpa_s, MSG_DEBUG,
 601                         "nai-realm-cred-username: EAP method not supported: %d",
 602                         eap->method);
 603                 return 0; /* method not supported */
 604         }
 605
 606         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
 607             eap->method != EAP_TYPE_FAST) {
 608                 /* Only tunneled methods with username/password supported */
 609                 wpa_msg(wpa_s, MSG_DEBUG,
 610                         "nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
 611                         eap->method);
 612                 return 0;
 613         }
 614
 615         if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
 616                 if (eap->inner_method &&
 617                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
 618                         wpa_msg(wpa_s, MSG_DEBUG,
 619                                 "nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
 620                                 eap->inner_method);
 621                         return 0;
 622                 }
 623                 if (!eap->inner_method &&
 624                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
 625                         wpa_msg(wpa_s, MSG_DEBUG,
 626                                 "nai-realm-cred-username: MSCHAPv2 not supported");
 627                         return 0;
 628                 }
 629         }
 630
 631         if (eap->method == EAP_TYPE_TTLS) {
 632                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 633                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 634                 if (eap->inner_method &&
 635                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
 636                         wpa_msg(wpa_s, MSG_DEBUG,
 637                                 "nai-realm-cred-username: TTLS, but inner not supported: %d",
 638                                 eap->inner_method);
 639                         return 0;
 640                 }
 641                 if (eap->inner_non_eap &&
 642                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 643                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 644                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 645                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
 646                         wpa_msg(wpa_s, MSG_DEBUG,
 647                                 "nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
 648                                 eap->inner_non_eap);
 649                         return 0;
 650                 }
 651         }
 652
 653         if (eap->inner_method &&
 654             eap->inner_method != EAP_TYPE_GTC &&
 655             eap->inner_method != EAP_TYPE_MSCHAPV2) {
 656                 wpa_msg(wpa_s, MSG_DEBUG,
 657                         "nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
 658                         eap->inner_method);
 659                 return 0;
 660         }
 661
 662         return 1;
 663 }
 664
 665
 666 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
 667                                struct nai_realm_eap *eap)
 668 {
 669         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
 670                 wpa_msg(wpa_s, MSG_DEBUG,
 671                         "nai-realm-cred-cert: Method not supported: %d",
 672                         eap->method);
 673                 return 0; /* method not supported */
 674         }
 675
 676         if (eap->method != EAP_TYPE_TLS) {
 677                 /* Only EAP-TLS supported for credential authentication */
 678                 wpa_msg(wpa_s, MSG_DEBUG,
 679                         "nai-realm-cred-cert: Method not TLS: %d",
 680                         eap->method);
 681                 return 0;
 682         }
 683
 684         return 1;
 685 }
 686
 687
 688 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
 689                                                  struct wpa_cred *cred,
 690                                                  struct nai_realm *realm)
 691 {
 692         u8 e;
 693
 694         if (cred->username == NULL ||
 695             cred->username[0] == '\0' ||
 696             ((cred->password == NULL ||
 697               cred->password[0] == '\0') &&
 698              (cred->private_key == NULL ||
 699               cred->private_key[0] == '\0'))) {
 700                 wpa_msg(wpa_s, MSG_DEBUG,
 701                         "nai-realm-find-eap: incomplete cred info: username: %s  password: %s private_key: %s",
 702                         cred->username ? cred->username : "NULL",
 703                         cred->password ? cred->password : "NULL",
 704                         cred->private_key ? cred->private_key : "NULL");
 705                 return NULL;
 706         }
 707
 708         for (e = 0; e < realm->eap_count; e++) {
 709                 struct nai_realm_eap *eap = &realm->eap[e];
 710                 if (cred->password && cred->password[0] &&
 711                     nai_realm_cred_username(wpa_s, eap))
 712                         return eap;
 713                 if (cred->private_key && cred->private_key[0] &&
 714                     nai_realm_cred_cert(wpa_s, eap))
 715                         return eap;
 716         }
 717
 718         return NULL;
 719 }
 720
 721
 722 #ifdef INTERWORKING_3GPP
 723
 724 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 725 {
 726         u8 plmn[3], plmn2[3];
 727         const u8 *pos, *end;
 728         u8 udhl;
 729
 730         /*
 731          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 732          * operator is allowed to include only two digits of the MNC, so allow
 733          * matches based on both two and three digit MNC assumptions. Since some
 734          * SIM/USIM cards may not expose MNC length conveniently, we may be
 735          * provided the default MNC length 3 here and as such, checking with MNC
 736          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 737          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 738          * with otherwise matching values would not be good idea in general, so
 739          * this should not result in selecting incorrect networks.
 740          */
 741         /* Match with 3 digit MNC */
 742         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 743         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 744         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 745         /* Match with 2 digit MNC */
 746         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 747         plmn2[1] = (imsi[2] - '0') | 0xf0;
 748         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 749
 750         if (anqp == NULL)
 751                 return 0;
 752         pos = wpabuf_head_u8(anqp);
 753         end = pos + wpabuf_len(anqp);
 754         if (end - pos < 2)
 755                 return 0;
 756         if (*pos != 0) {
 757                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 758                 return 0;
 759         }
 760         pos++;
 761         udhl = *pos++;
 762         if (udhl > end - pos) {
 763                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 764                 return 0;
 765         }
 766         end = pos + udhl;
 767
 768         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 769                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 770                    imsi, mnc_len);
 771
 772         while (end - pos >= 2) {
 773                 u8 iei, len;
 774                 const u8 *l_end;
 775                 iei = *pos++;
 776                 len = *pos++ & 0x7f;
 777                 if (len > end - pos)
 778                         break;
 779                 l_end = pos + len;
 780
 781                 if (iei == 0 && len > 0) {
 782                         /* PLMN List */
 783                         u8 num, i;
 784                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 785                                     pos, len);
 786                         num = *pos++;
 787                         for (i = 0; i < num; i++) {
 788                                 if (l_end - pos < 3)
 789                                         break;
 790                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 791                                     os_memcmp(pos, plmn2, 3) == 0)
 792                                         return 1; /* Found matching PLMN */
 793                                 pos += 3;
 794                         }
 795                 } else {
 796                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 797                                     pos, len);
 798                 }
 799
 800                 pos = l_end;
 801         }
 802
 803         return 0;
 804 }
 805
 806
 807 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 808                           size_t mnc_len, char prefix)
 809 {
 810         const char *sep, *msin;
 811         char *end, *pos;
 812         size_t msin_len, plmn_len;
 813
 814         /*
 815          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 816          * Root NAI:
 817          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 818          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 819          */
 820
 821         if (imsi == NULL || os_strlen(imsi) > 16) {
 822                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 823                 return -1;
 824         }
 825         sep = os_strchr(imsi, '-');
 826         if (sep) {
 827                 plmn_len = sep - imsi;
 828                 msin = sep + 1;
 829         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 830                 plmn_len = 3 + mnc_len;
 831                 msin = imsi + plmn_len;
 832         } else
 833                 return -1;
 834         if (plmn_len != 5 && plmn_len != 6)
 835                 return -1;
 836         msin_len = os_strlen(msin);
 837
 838         pos = nai;
 839         end = nai + nai_len;
 840         if (prefix)
 841                 *pos++ = prefix;
 842         os_memcpy(pos, imsi, plmn_len);
 843         pos += plmn_len;
 844         os_memcpy(pos, msin, msin_len);
 845         pos += msin_len;
 846         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 847         if (plmn_len == 5) {
 848                 *pos++ = '0';
 849                 *pos++ = imsi[3];
 850                 *pos++ = imsi[4];
 851         } else {
 852                 *pos++ = imsi[3];
 853                 *pos++ = imsi[4];
 854                 *pos++ = imsi[5];
 855         }
 856         os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 857                     imsi[0], imsi[1], imsi[2]);
 858
 859         return 0;
 860 }
 861
 862
 863 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 864 {
 865         char nai[100];
 866         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 867                 return -1;
 868         return wpa_config_set_quoted(ssid, "identity", nai);
 869 }
 870
 871 #endif /* INTERWORKING_3GPP */
 872
 873
 874 static int already_connected(struct wpa_supplicant *wpa_s,
 875                              struct wpa_cred *cred, struct wpa_bss *bss)
 876 {
 877         struct wpa_ssid *ssid, *sel_ssid;
 878         struct wpa_bss *selected;
 879
 880         if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
 881                 return 0;
 882
 883         ssid = wpa_s->current_ssid;
 884         if (ssid->parent_cred != cred)
 885                 return 0;
 886
 887         if (ssid->ssid_len != bss->ssid_len ||
 888             os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 889                 return 0;
 890
 891         sel_ssid = NULL;
 892         selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
 893         if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
 894                 return 0; /* higher priority network in scan results */
 895
 896         return 1;
 897 }
 898
 899
 900 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
 901                                      struct wpa_cred *cred,
 902                                      struct wpa_bss *bss)
 903 {
 904         struct wpa_ssid *ssid;
 905
 906         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 907                 if (ssid->parent_cred != cred)
 908                         continue;
 909                 if (ssid->ssid_len != bss->ssid_len ||
 910                     os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 911                         continue;
 912
 913                 break;
 914         }
 915
 916         if (ssid == NULL)
 917                 return;
 918
 919         wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
 920
 921         if (ssid == wpa_s->current_ssid) {
 922                 wpa_sm_set_config(wpa_s->wpa, NULL);
 923                 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 924                 wpa_s->own_disconnect_req = 1;
 925                 wpa_supplicant_deauthenticate(wpa_s,
 926                                               WLAN_REASON_DEAUTH_LEAVING);
 927         }
 928
 929         wpas_notify_network_removed(wpa_s, ssid);
 930         wpa_config_remove_network(wpa_s->conf, ssid->id);
 931 }
 932
 933
 934 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 935                                         struct wpa_ssid *ssid)
 936 {
 937         const char *key_mgmt = NULL;
 938 #ifdef CONFIG_IEEE80211R
 939         int res;
 940         struct wpa_driver_capa capa;
 941
 942         res = wpa_drv_get_capa(wpa_s, &capa);
 943         if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
 944                 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 945                         "WPA-EAP WPA-EAP-SHA256 FT-EAP" :
 946                         "WPA-EAP FT-EAP";
 947         }
 948 #endif /* CONFIG_IEEE80211R */
 949
 950         if (!key_mgmt)
 951                 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 952                         "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
 953         if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0)
 954                 return -1;
 955         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 956                 return -1;
 957         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 958                 return -1;
 959         return 0;
 960 }
 961
 962
 963 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 964                                      struct wpa_cred *cred,
 965                                      struct wpa_bss *bss, int only_add)
 966 {
 967 #ifdef INTERWORKING_3GPP
 968         struct wpa_ssid *ssid;
 969         int eap_type;
 970         int res;
 971         char prefix;
 972
 973         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 974                 return -1;
 975
 976         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
 977                 " (3GPP)", MAC2STR(bss->bssid));
 978
 979         if (already_connected(wpa_s, cred, bss)) {
 980                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
 981                         MAC2STR(bss->bssid));
 982                 return wpa_s->current_ssid->id;
 983         }
 984
 985         remove_duplicate_network(wpa_s, cred, bss);
 986
 987         ssid = wpa_config_add_network(wpa_s->conf);
 988         if (ssid == NULL)
 989                 return -1;
 990         ssid->parent_cred = cred;
 991
 992         wpas_notify_network_added(wpa_s, ssid);
 993         wpa_config_set_network_defaults(ssid);
 994         ssid->priority = cred->priority;
 995         ssid->temporary = 1;
 996         ssid->ssid = os_zalloc(bss->ssid_len + 1);
 997         if (ssid->ssid == NULL)
 998                 goto fail;
 999         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1000         ssid->ssid_len = bss->ssid_len;
1001         ssid->eap.sim_num = cred->sim_num;
1002
1003         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1004                 goto fail;
1005
1006         eap_type = EAP_TYPE_SIM;
1007         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1008                 eap_type = EAP_TYPE_AKA;
1009         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1010                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1011                     cred->eap_method[0].method == EAP_TYPE_AKA ||
1012                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1013                         eap_type = cred->eap_method[0].method;
1014         }
1015
1016         switch (eap_type) {
1017         case EAP_TYPE_SIM:
1018                 prefix = '1';
1019                 res = wpa_config_set(ssid, "eap", "SIM", 0);
1020                 break;
1021         case EAP_TYPE_AKA:
1022                 prefix = '0';
1023                 res = wpa_config_set(ssid, "eap", "AKA", 0);
1024                 break;
1025         case EAP_TYPE_AKA_PRIME:
1026                 prefix = '6';
1027                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
1028                 break;
1029         default:
1030                 res = -1;
1031                 break;
1032         }
1033         if (res < 0) {
1034                 wpa_msg(wpa_s, MSG_DEBUG,
1035                         "Selected EAP method (%d) not supported", eap_type);
1036                 goto fail;
1037         }
1038
1039         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1040                 wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1041                 goto fail;
1042         }
1043
1044         if (cred->milenage && cred->milenage[0]) {
1045                 if (wpa_config_set_quoted(ssid, "password",
1046                                           cred->milenage) < 0)
1047                         goto fail;
1048         } else if (cred->pcsc) {
1049                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1050                         goto fail;
1051                 if (wpa_s->conf->pcsc_pin &&
1052                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1053                     < 0)
1054                         goto fail;
1055         }
1056
1057         wpa_s->next_ssid = ssid;
1058         wpa_config_update_prio_list(wpa_s->conf);
1059         if (!only_add)
1060                 interworking_reconnect(wpa_s);
1061
1062         return ssid->id;
1063
1064 fail:
1065         wpas_notify_network_removed(wpa_s, ssid);
1066         wpa_config_remove_network(wpa_s->conf, ssid->id);
1067 #endif /* INTERWORKING_3GPP */
1068         return -1;
1069 }
1070
1071
1072 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
1073                                             size_t rc_len)
1074 {
1075         const u8 *pos, *end;
1076         u8 lens;
1077
1078         if (ie == NULL)
1079                 return 0;
1080
1081         pos = ie + 2;
1082         end = ie + 2 + ie[1];
1083
1084         /* Roaming Consortium element:
1085          * Number of ANQP OIs
1086          * OI #1 and #2 lengths
1087          * OI #1, [OI #2], [OI #3]
1088          */
1089
1090         if (end - pos < 2)
1091                 return 0;
1092
1093         pos++; /* skip Number of ANQP OIs */
1094         lens = *pos++;
1095         if ((lens & 0x0f) + (lens >> 4) > end - pos)
1096                 return 0;
1097
1098         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1099                 return 1;
1100         pos += lens & 0x0f;
1101
1102         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1103                 return 1;
1104         pos += lens >> 4;
1105
1106         if (pos < end && (size_t) (end - pos) == rc_len &&
1107             os_memcmp(pos, rc_id, rc_len) == 0)
1108                 return 1;
1109
1110         return 0;
1111 }
1112
1113
1114 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1115                                          const u8 *rc_id, size_t rc_len)
1116 {
1117         const u8 *pos, *end;
1118         u8 len;
1119
1120         if (anqp == NULL)
1121                 return 0;
1122
1123         pos = wpabuf_head(anqp);
1124         end = pos + wpabuf_len(anqp);
1125
1126         /* Set of <OI Length, OI> duples */
1127         while (pos < end) {
1128                 len = *pos++;
1129                 if (len > end - pos)
1130                         break;
1131                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1132                         return 1;
1133                 pos += len;
1134         }
1135
1136         return 0;
1137 }
1138
1139
1140 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1141                                     const u8 *rc_id, size_t rc_len)
1142 {
1143         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1144                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1145 }
1146
1147
1148 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1149 {
1150         const u8 *ie;
1151
1152         if (cred->required_roaming_consortium_len == 0)
1153                 return 0;
1154
1155         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1156
1157         if (ie == NULL &&
1158             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1159                 return 1;
1160
1161         return !roaming_consortium_match(ie,
1162                                          bss->anqp ?
1163                                          bss->anqp->roaming_consortium : NULL,
1164                                          cred->required_roaming_consortium,
1165                                          cred->required_roaming_consortium_len);
1166 }
1167
1168
1169 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1170 {
1171         size_t i;
1172
1173         if (!cred->excluded_ssid)
1174                 return 0;
1175
1176         for (i = 0; i < cred->num_excluded_ssid; i++) {
1177                 struct excluded_ssid *e = &cred->excluded_ssid[i];
1178                 if (bss->ssid_len == e->ssid_len &&
1179                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1180                         return 1;
1181         }
1182
1183         return 0;
1184 }
1185
1186
1187 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1188                                    struct wpa_cred *cred, struct wpa_bss *bss)
1189 {
1190 #ifdef CONFIG_HS20
1191         int res;
1192         unsigned int dl_bandwidth, ul_bandwidth;
1193         const u8 *wan;
1194         u8 wan_info, dl_load, ul_load;
1195         u16 lmd;
1196         u32 ul_speed, dl_speed;
1197
1198         if (!cred->min_dl_bandwidth_home &&
1199             !cred->min_ul_bandwidth_home &&
1200             !cred->min_dl_bandwidth_roaming &&
1201             !cred->min_ul_bandwidth_roaming)
1202                 return 0; /* No bandwidth constraint specified */
1203
1204         if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1205                 return 0; /* No WAN Metrics known - ignore constraint */
1206
1207         wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1208         wan_info = wan[0];
1209         if (wan_info & BIT(3))
1210                 return 1; /* WAN link at capacity */
1211         lmd = WPA_GET_LE16(wan + 11);
1212         if (lmd == 0)
1213                 return 0; /* Downlink/Uplink Load was not measured */
1214         dl_speed = WPA_GET_LE32(wan + 1);
1215         ul_speed = WPA_GET_LE32(wan + 5);
1216         dl_load = wan[9];
1217         ul_load = wan[10];
1218
1219         if (dl_speed >= 0xffffff)
1220                 dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1221         else
1222                 dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1223
1224         if (ul_speed >= 0xffffff)
1225                 ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1226         else
1227                 ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1228
1229         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1230                                         bss->anqp->domain_name : NULL);
1231         if (res > 0) {
1232                 if (cred->min_dl_bandwidth_home > dl_bandwidth)
1233                         return 1;
1234                 if (cred->min_ul_bandwidth_home > ul_bandwidth)
1235                         return 1;
1236         } else {
1237                 if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1238                         return 1;
1239                 if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1240                         return 1;
1241         }
1242 #endif /* CONFIG_HS20 */
1243
1244         return 0;
1245 }
1246
1247
1248 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1249                                   struct wpa_cred *cred, struct wpa_bss *bss)
1250 {
1251         const u8 *ie;
1252         int res;
1253
1254         if (!cred->max_bss_load)
1255                 return 0; /* No BSS Load constraint specified */
1256
1257         ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1258         if (ie == NULL || ie[1] < 3)
1259                 return 0; /* No BSS Load advertised */
1260
1261         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1262                                         bss->anqp->domain_name : NULL);
1263         if (res <= 0)
1264                 return 0; /* Not a home network */
1265
1266         return ie[4] > cred->max_bss_load;
1267 }
1268
1269
1270 #ifdef CONFIG_HS20
1271
1272 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1273 {
1274         while (end - pos >= 4) {
1275                 if (pos[0] == proto && pos[3] == 1 /* Open */)
1276                         return 1;
1277                 pos += 4;
1278         }
1279
1280         return 0;
1281 }
1282
1283
1284 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1285                                 u16 port)
1286 {
1287         while (end - pos >= 4) {
1288                 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1289                     pos[3] == 1 /* Open */)
1290                         return 1;
1291                 pos += 4;
1292         }
1293
1294         return 0;
1295 }
1296
1297 #endif /* CONFIG_HS20 */
1298
1299
1300 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1301                                    struct wpa_cred *cred, struct wpa_bss *bss)
1302 {
1303 #ifdef CONFIG_HS20
1304         int res;
1305         const u8 *capab, *end;
1306         unsigned int i, j;
1307         int *ports;
1308
1309         if (!cred->num_req_conn_capab)
1310                 return 0; /* No connection capability constraint specified */
1311
1312         if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1313                 return 0; /* No Connection Capability known - ignore constraint
1314                            */
1315
1316         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1317                                         bss->anqp->domain_name : NULL);
1318         if (res > 0)
1319                 return 0; /* No constraint in home network */
1320
1321         capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1322         end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1323
1324         for (i = 0; i < cred->num_req_conn_capab; i++) {
1325                 ports = cred->req_conn_capab_port[i];
1326                 if (!ports) {
1327                         if (!has_proto_match(capab, end,
1328                                              cred->req_conn_capab_proto[i]))
1329                                 return 1;
1330                 } else {
1331                         for (j = 0; ports[j] > -1; j++) {
1332                                 if (!has_proto_port_match(
1333                                             capab, end,
1334                                             cred->req_conn_capab_proto[i],
1335                                             ports[j]))
1336                                         return 1;
1337                         }
1338                 }
1339         }
1340 #endif /* CONFIG_HS20 */
1341
1342         return 0;
1343 }
1344
1345
1346 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1347         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1348         int *excluded)
1349 {
1350         struct wpa_cred *cred, *selected = NULL;
1351         const u8 *ie;
1352         int is_excluded = 0;
1353
1354         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1355
1356         if (ie == NULL &&
1357             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1358                 return NULL;
1359
1360         if (wpa_s->conf->cred == NULL)
1361                 return NULL;
1362
1363         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1364                 if (cred->roaming_consortium_len == 0)
1365                         continue;
1366
1367                 if (!roaming_consortium_match(ie,
1368                                               bss->anqp ?
1369                                               bss->anqp->roaming_consortium :
1370                                               NULL,
1371                                               cred->roaming_consortium,
1372                                               cred->roaming_consortium_len))
1373                         continue;
1374
1375                 if (cred_no_required_oi_match(cred, bss))
1376                         continue;
1377                 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1378                         continue;
1379                 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1380                         continue;
1381                 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1382                         continue;
1383                 if (cred_excluded_ssid(cred, bss)) {
1384                         if (excluded == NULL)
1385                                 continue;
1386                         if (selected == NULL) {
1387                                 selected = cred;
1388                                 is_excluded = 1;
1389                         }
1390                 } else {
1391                         if (selected == NULL || is_excluded ||
1392                             cred_prio_cmp(selected, cred) < 0) {
1393                                 selected = cred;
1394                                 is_excluded = 0;
1395                         }
1396                 }
1397         }
1398
1399         if (excluded)
1400                 *excluded = is_excluded;
1401
1402         return selected;
1403 }
1404
1405
1406 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1407                                        struct wpa_cred *cred, int ttls)
1408 {
1409         if (cred->eap_method) {
1410                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1411                         cred->eap_method->method == EAP_TYPE_TTLS;
1412
1413                 os_free(ssid->eap.eap_methods);
1414                 ssid->eap.eap_methods =
1415                         os_malloc(sizeof(struct eap_method_type) * 2);
1416                 if (ssid->eap.eap_methods == NULL)
1417                         return -1;
1418                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1419                           sizeof(*cred->eap_method));
1420                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1421                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1422         }
1423
1424         if (ttls && cred->username && cred->username[0]) {
1425                 const char *pos;
1426                 char *anon;
1427                 /* Use anonymous NAI in Phase 1 */
1428                 pos = os_strchr(cred->username, '@');
1429                 if (pos) {
1430                         size_t buflen = 9 + os_strlen(pos) + 1;
1431                         anon = os_malloc(buflen);
1432                         if (anon == NULL)
1433                                 return -1;
1434                         os_snprintf(anon, buflen, "anonymous%s", pos);
1435                 } else if (cred->realm) {
1436                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1437                         anon = os_malloc(buflen);
1438                         if (anon == NULL)
1439                                 return -1;
1440                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1441                 } else {
1442                         anon = os_strdup("anonymous");
1443                         if (anon == NULL)
1444                                 return -1;
1445                 }
1446                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1447                     0) {
1448                         os_free(anon);
1449                         return -1;
1450                 }
1451                 os_free(anon);
1452         }
1453
1454         if (!ttls && cred->username && cred->username[0] && cred->realm &&
1455             !os_strchr(cred->username, '@')) {
1456                 char *id;
1457                 size_t buflen;
1458                 int res;
1459
1460                 buflen = os_strlen(cred->username) + 1 +
1461                         os_strlen(cred->realm) + 1;
1462
1463                 id = os_malloc(buflen);
1464                 if (!id)
1465                         return -1;
1466                 os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm);
1467                 res = wpa_config_set_quoted(ssid, "identity", id);
1468                 os_free(id);
1469                 if (res < 0)
1470                         return -1;
1471         } else if (cred->username && cred->username[0] &&
1472             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1473                 return -1;
1474
1475         if (cred->password && cred->password[0]) {
1476                 if (cred->ext_password &&
1477                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1478                         return -1;
1479                 if (!cred->ext_password &&
1480                     wpa_config_set_quoted(ssid, "password", cred->password) <
1481                     0)
1482                         return -1;
1483         }
1484
1485         if (cred->client_cert && cred->client_cert[0] &&
1486             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1487                 return -1;
1488
1489 #ifdef ANDROID
1490         if (cred->private_key &&
1491             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1492                 /* Use OpenSSL engine configuration for Android keystore */
1493                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1494                     wpa_config_set_quoted(ssid, "key_id",
1495                                           cred->private_key + 11) < 0 ||
1496                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1497                         return -1;
1498         } else
1499 #endif /* ANDROID */
1500         if (cred->private_key && cred->private_key[0] &&
1501             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1502                 return -1;
1503
1504         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1505             wpa_config_set_quoted(ssid, "private_key_passwd",
1506                                   cred->private_key_passwd) < 0)
1507                 return -1;
1508
1509         if (cred->phase1) {
1510                 os_free(ssid->eap.phase1);
1511                 ssid->eap.phase1 = os_strdup(cred->phase1);
1512         }
1513         if (cred->phase2) {
1514                 os_free(ssid->eap.phase2);
1515                 ssid->eap.phase2 = os_strdup(cred->phase2);
1516         }
1517
1518         if (cred->ca_cert && cred->ca_cert[0] &&
1519             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1520                 return -1;
1521
1522         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1523             wpa_config_set_quoted(ssid, "domain_suffix_match",
1524                                   cred->domain_suffix_match) < 0)
1525                 return -1;
1526
1527         ssid->eap.ocsp = cred->ocsp;
1528
1529         return 0;
1530 }
1531
1532
1533 static int interworking_connect_roaming_consortium(
1534         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1535         struct wpa_bss *bss, int only_add)
1536 {
1537         struct wpa_ssid *ssid;
1538
1539         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1540                 " based on roaming consortium match", MAC2STR(bss->bssid));
1541
1542         if (already_connected(wpa_s, cred, bss)) {
1543                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1544                         MAC2STR(bss->bssid));
1545                 return wpa_s->current_ssid->id;
1546         }
1547
1548         remove_duplicate_network(wpa_s, cred, bss);
1549
1550         ssid = wpa_config_add_network(wpa_s->conf);
1551         if (ssid == NULL)
1552                 return -1;
1553         ssid->parent_cred = cred;
1554         wpas_notify_network_added(wpa_s, ssid);
1555         wpa_config_set_network_defaults(ssid);
1556         ssid->priority = cred->priority;
1557         ssid->temporary = 1;
1558         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1559         if (ssid->ssid == NULL)
1560                 goto fail;
1561         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1562         ssid->ssid_len = bss->ssid_len;
1563
1564         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1565                 goto fail;
1566
1567         if (cred->eap_method == NULL) {
1568                 wpa_msg(wpa_s, MSG_DEBUG,
1569                         "Interworking: No EAP method set for credential using roaming consortium");
1570                 goto fail;
1571         }
1572
1573         if (interworking_set_eap_params(
1574                     ssid, cred,
1575                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1576                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1577                 goto fail;
1578
1579         wpa_s->next_ssid = ssid;
1580         wpa_config_update_prio_list(wpa_s->conf);
1581         if (!only_add)
1582                 interworking_reconnect(wpa_s);
1583
1584         return ssid->id;
1585
1586 fail:
1587         wpas_notify_network_removed(wpa_s, ssid);
1588         wpa_config_remove_network(wpa_s->conf, ssid->id);
1589         return -1;
1590 }
1591
1592
1593 static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
1594                                        struct wpa_bss *bss, int allow_excluded,
1595                                        int only_add)
1596 {
1597         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1598         struct wpa_ssid *ssid;
1599         struct nai_realm *realm;
1600         struct nai_realm_eap *eap = NULL;
1601         u16 count, i;
1602         char buf[100];
1603         int excluded = 0, *excl = allow_excluded ? &excluded : NULL;
1604         const char *name;
1605
1606         if (wpa_s->conf->cred == NULL || bss == NULL)
1607                 return -1;
1608         if (disallowed_bssid(wpa_s, bss->bssid) ||
1609             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1610                 wpa_msg(wpa_s, MSG_DEBUG,
1611                         "Interworking: Reject connection to disallowed BSS "
1612                         MACSTR, MAC2STR(bss->bssid));
1613                 return -1;
1614         }
1615
1616         wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1617                    " for connection (allow_excluded=%d)",
1618                    MAC2STR(bss->bssid), allow_excluded);
1619
1620         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1621                 /*
1622                  * We currently support only HS 2.0 networks and those are
1623                  * required to use WPA2-Enterprise.
1624                  */
1625                 wpa_msg(wpa_s, MSG_DEBUG,
1626                         "Interworking: Network does not use RSN");
1627                 return -1;
1628         }
1629
1630         cred_rc = interworking_credentials_available_roaming_consortium(
1631                 wpa_s, bss, 0, excl);
1632         if (cred_rc) {
1633                 wpa_msg(wpa_s, MSG_DEBUG,
1634                         "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1635                         cred_rc->priority, cred_rc->sp_priority);
1636                 if (allow_excluded && excl && !(*excl))
1637                         excl = NULL;
1638         }
1639
1640         cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1641         if (cred) {
1642                 wpa_msg(wpa_s, MSG_DEBUG,
1643                         "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1644                         cred->priority, cred->sp_priority);
1645                 if (allow_excluded && excl && !(*excl))
1646                         excl = NULL;
1647         }
1648
1649         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1650                                                             excl);
1651         if (cred_3gpp) {
1652                 wpa_msg(wpa_s, MSG_DEBUG,
1653                         "Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1654                         cred_3gpp->priority, cred_3gpp->sp_priority);
1655                 if (allow_excluded && excl && !(*excl))
1656                         excl = NULL;
1657         }
1658
1659         if (!cred_rc && !cred && !cred_3gpp) {
1660                 wpa_msg(wpa_s, MSG_DEBUG,
1661                         "Interworking: No full credential matches - consider options without BW(etc.) limits");
1662                 cred_rc = interworking_credentials_available_roaming_consortium(
1663                         wpa_s, bss, 1, excl);
1664                 if (cred_rc) {
1665                         wpa_msg(wpa_s, MSG_DEBUG,
1666                                 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1667                                 cred_rc->priority, cred_rc->sp_priority);
1668                         if (allow_excluded && excl && !(*excl))
1669                                 excl = NULL;
1670                 }
1671
1672                 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1673                                                                 excl);
1674                 if (cred) {
1675                         wpa_msg(wpa_s, MSG_DEBUG,
1676                                 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1677                                 cred->priority, cred->sp_priority);
1678                         if (allow_excluded && excl && !(*excl))
1679                                 excl = NULL;
1680                 }
1681
1682                 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1683                                                                     1, excl);
1684                 if (cred_3gpp) {
1685                         wpa_msg(wpa_s, MSG_DEBUG,
1686                                 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1687                                 cred_3gpp->priority, cred_3gpp->sp_priority);
1688                         if (allow_excluded && excl && !(*excl))
1689                                 excl = NULL;
1690                 }
1691         }
1692
1693         if (cred_rc &&
1694             (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1695             (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1696                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1697                                                                bss, only_add);
1698
1699         if (cred_3gpp &&
1700             (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1701                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1702                                                  only_add);
1703         }
1704
1705         if (cred == NULL) {
1706                 wpa_msg(wpa_s, MSG_DEBUG,
1707                         "Interworking: No matching credentials found for "
1708                         MACSTR, MAC2STR(bss->bssid));
1709                 return -1;
1710         }
1711
1712         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1713                                 &count);
1714         if (realm == NULL) {
1715                 wpa_msg(wpa_s, MSG_DEBUG,
1716                         "Interworking: Could not parse NAI Realm list from "
1717                         MACSTR, MAC2STR(bss->bssid));
1718                 return -1;
1719         }
1720
1721         for (i = 0; i < count; i++) {
1722                 if (!nai_realm_match(&realm[i], cred->realm))
1723                         continue;
1724                 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1725                 if (eap)
1726                         break;
1727         }
1728
1729         if (!eap) {
1730                 wpa_msg(wpa_s, MSG_DEBUG,
1731                         "Interworking: No matching credentials and EAP method found for "
1732                         MACSTR, MAC2STR(bss->bssid));
1733                 nai_realm_free(realm, count);
1734                 return -1;
1735         }
1736
1737         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1738                 MAC2STR(bss->bssid));
1739
1740         if (already_connected(wpa_s, cred, bss)) {
1741                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1742                         MAC2STR(bss->bssid));
1743                 nai_realm_free(realm, count);
1744                 return 0;
1745         }
1746
1747         remove_duplicate_network(wpa_s, cred, bss);
1748
1749         ssid = wpa_config_add_network(wpa_s->conf);
1750         if (ssid == NULL) {
1751                 nai_realm_free(realm, count);
1752                 return -1;
1753         }
1754         ssid->parent_cred = cred;
1755         wpas_notify_network_added(wpa_s, ssid);
1756         wpa_config_set_network_defaults(ssid);
1757         ssid->priority = cred->priority;
1758         ssid->temporary = 1;
1759         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1760         if (ssid->ssid == NULL)
1761                 goto fail;
1762         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1763         ssid->ssid_len = bss->ssid_len;
1764
1765         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1766                 goto fail;
1767
1768         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1769                                                      eap->method), 0) < 0)
1770                 goto fail;
1771
1772         switch (eap->method) {
1773         case EAP_TYPE_TTLS:
1774                 if (eap->inner_method) {
1775                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1776                                     eap_get_name(EAP_VENDOR_IETF,
1777                                                  eap->inner_method));
1778                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1779                                 goto fail;
1780                         break;
1781                 }
1782                 switch (eap->inner_non_eap) {
1783                 case NAI_REALM_INNER_NON_EAP_PAP:
1784                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1785                             0)
1786                                 goto fail;
1787                         break;
1788                 case NAI_REALM_INNER_NON_EAP_CHAP:
1789                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1790                             < 0)
1791                                 goto fail;
1792                         break;
1793                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1794                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1795                                            0) < 0)
1796                                 goto fail;
1797                         break;
1798                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1799                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1800                                            0) < 0)
1801                                 goto fail;
1802                         break;
1803                 default:
1804                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1805                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1806                                            0) < 0)
1807                                 goto fail;
1808                         break;
1809                 }
1810                 break;
1811         case EAP_TYPE_PEAP:
1812         case EAP_TYPE_FAST:
1813                 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1814                                    0) < 0)
1815                         goto fail;
1816                 if (wpa_config_set(ssid, "pac_file",
1817                                    "\"blob://pac_interworking\"", 0) < 0)
1818                         goto fail;
1819                 name = eap_get_name(EAP_VENDOR_IETF,
1820                                     eap->inner_method ? eap->inner_method :
1821                                     EAP_TYPE_MSCHAPV2);
1822                 if (name == NULL)
1823                         goto fail;
1824                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1825                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1826                         goto fail;
1827                 break;
1828         case EAP_TYPE_TLS:
1829                 break;
1830         }
1831
1832         if (interworking_set_eap_params(ssid, cred,
1833                                         eap->method == EAP_TYPE_TTLS) < 0)
1834                 goto fail;
1835
1836         nai_realm_free(realm, count);
1837
1838         wpa_s->next_ssid = ssid;
1839         wpa_config_update_prio_list(wpa_s->conf);
1840         if (!only_add)
1841                 interworking_reconnect(wpa_s);
1842
1843         return ssid->id;
1844
1845 fail:
1846         wpas_notify_network_removed(wpa_s, ssid);
1847         wpa_config_remove_network(wpa_s->conf, ssid->id);
1848         nai_realm_free(realm, count);
1849         return -1;
1850 }
1851
1852
1853 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1854                          int only_add)
1855 {
1856         return interworking_connect_helper(wpa_s, bss, 1, only_add);
1857 }
1858
1859
1860 #ifdef PCSC_FUNCS
1861 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1862 {
1863         size_t len;
1864
1865         if (wpa_s->imsi[0] && wpa_s->mnc_len)
1866                 return 0;
1867
1868         len = sizeof(wpa_s->imsi) - 1;
1869         if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1870                 scard_deinit(wpa_s->scard);
1871                 wpa_s->scard = NULL;
1872                 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1873                 return -1;
1874         }
1875         wpa_s->imsi[len] = '\0';
1876         wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1877         wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1878                    wpa_s->imsi, wpa_s->mnc_len);
1879
1880         return 0;
1881 }
1882 #endif /* PCSC_FUNCS */
1883
1884
1885 static struct wpa_cred * interworking_credentials_available_3gpp(
1886         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1887         int *excluded)
1888 {
1889         struct wpa_cred *selected = NULL;
1890 #ifdef INTERWORKING_3GPP
1891         struct wpa_cred *cred;
1892         int ret;
1893         int is_excluded = 0;
1894
1895         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1896                 wpa_msg(wpa_s, MSG_DEBUG,
1897                         "interworking-avail-3gpp: not avail, anqp: %p  anqp_3gpp: %p",
1898                         bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1899                 return NULL;
1900         }
1901
1902 #ifdef CONFIG_EAP_PROXY
1903         if (!wpa_s->imsi[0]) {
1904                 size_t len;
1905                 wpa_msg(wpa_s, MSG_DEBUG,
1906                         "Interworking: IMSI not available - try to read again through eap_proxy");
1907                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1908                                                              wpa_s->imsi,
1909                                                              &len);
1910                 if (wpa_s->mnc_len > 0) {
1911                         wpa_s->imsi[len] = '\0';
1912                         wpa_msg(wpa_s, MSG_DEBUG,
1913                                 "eap_proxy: IMSI %s (MNC length %d)",
1914                                 wpa_s->imsi, wpa_s->mnc_len);
1915                 } else {
1916                         wpa_msg(wpa_s, MSG_DEBUG,
1917                                 "eap_proxy: IMSI not available");
1918                 }
1919         }
1920 #endif /* CONFIG_EAP_PROXY */
1921
1922         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1923                 char *sep;
1924                 const char *imsi;
1925                 int mnc_len;
1926                 char imsi_buf[16];
1927                 size_t msin_len;
1928
1929 #ifdef PCSC_FUNCS
1930                 if (cred->pcsc && wpa_s->scard) {
1931                         if (interworking_pcsc_read_imsi(wpa_s) < 0)
1932                                 continue;
1933                         imsi = wpa_s->imsi;
1934                         mnc_len = wpa_s->mnc_len;
1935                         goto compare;
1936                 }
1937 #endif /* PCSC_FUNCS */
1938 #ifdef CONFIG_EAP_PROXY
1939                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1940                         imsi = wpa_s->imsi;
1941                         mnc_len = wpa_s->mnc_len;
1942                         goto compare;
1943                 }
1944 #endif /* CONFIG_EAP_PROXY */
1945
1946                 if (cred->imsi == NULL || !cred->imsi[0] ||
1947                     (!wpa_s->conf->external_sim &&
1948                      (cred->milenage == NULL || !cred->milenage[0])))
1949                         continue;
1950
1951                 sep = os_strchr(cred->imsi, '-');
1952                 if (sep == NULL ||
1953                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1954                         continue;
1955                 mnc_len = sep - cred->imsi - 3;
1956                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1957                 sep++;
1958                 msin_len = os_strlen(cred->imsi);
1959                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1960                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1961                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1962                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1963                 imsi = imsi_buf;
1964
1965 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1966         compare:
1967 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1968                 wpa_msg(wpa_s, MSG_DEBUG,
1969                         "Interworking: Parsing 3GPP info from " MACSTR,
1970                         MAC2STR(bss->bssid));
1971                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1972                 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
1973                         ret ? "" : "not ");
1974                 if (ret) {
1975                         if (cred_no_required_oi_match(cred, bss))
1976                                 continue;
1977                         if (!ignore_bw &&
1978                             cred_below_min_backhaul(wpa_s, cred, bss))
1979                                 continue;
1980                         if (!ignore_bw &&
1981                             cred_over_max_bss_load(wpa_s, cred, bss))
1982                                 continue;
1983                         if (!ignore_bw &&
1984                             cred_conn_capab_missing(wpa_s, cred, bss))
1985                                 continue;
1986                         if (cred_excluded_ssid(cred, bss)) {
1987                                 if (excluded == NULL)
1988                                         continue;
1989                                 if (selected == NULL) {
1990                                         selected = cred;
1991                                         is_excluded = 1;
1992                                 }
1993                         } else {
1994                                 if (selected == NULL || is_excluded ||
1995                                     cred_prio_cmp(selected, cred) < 0) {
1996                                         selected = cred;
1997                                         is_excluded = 0;
1998                                 }
1999                         }
2000                 }
2001         }
2002
2003         if (excluded)
2004                 *excluded = is_excluded;
2005 #endif /* INTERWORKING_3GPP */
2006         return selected;
2007 }
2008
2009
2010 static struct wpa_cred * interworking_credentials_available_realm(
2011         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2012         int *excluded)
2013 {
2014         struct wpa_cred *cred, *selected = NULL;
2015         struct nai_realm *realm;
2016         u16 count, i;
2017         int is_excluded = 0;
2018
2019         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2020                 return NULL;
2021
2022         if (wpa_s->conf->cred == NULL)
2023                 return NULL;
2024
2025         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2026                 MACSTR, MAC2STR(bss->bssid));
2027         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2028         if (realm == NULL) {
2029                 wpa_msg(wpa_s, MSG_DEBUG,
2030                         "Interworking: Could not parse NAI Realm list from "
2031                         MACSTR, MAC2STR(bss->bssid));
2032                 return NULL;
2033         }
2034
2035         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2036                 if (cred->realm == NULL)
2037                         continue;
2038
2039                 for (i = 0; i < count; i++) {
2040                         if (!nai_realm_match(&realm[i], cred->realm))
2041                                 continue;
2042                         if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2043                                 if (cred_no_required_oi_match(cred, bss))
2044                                         continue;
2045                                 if (!ignore_bw &&
2046                                     cred_below_min_backhaul(wpa_s, cred, bss))
2047                                         continue;
2048                                 if (!ignore_bw &&
2049                                     cred_over_max_bss_load(wpa_s, cred, bss))
2050                                         continue;
2051                                 if (!ignore_bw &&
2052                                     cred_conn_capab_missing(wpa_s, cred, bss))
2053                                         continue;
2054                                 if (cred_excluded_ssid(cred, bss)) {
2055                                         if (excluded == NULL)
2056                                                 continue;
2057                                         if (selected == NULL) {
2058                                                 selected = cred;
2059                                                 is_excluded = 1;
2060                                         }
2061                                 } else {
2062                                         if (selected == NULL || is_excluded ||
2063                                             cred_prio_cmp(selected, cred) < 0)
2064                                         {
2065                                                 selected = cred;
2066                                                 is_excluded = 0;
2067                                         }
2068                                 }
2069                                 break;
2070                         } else {
2071                                 wpa_msg(wpa_s, MSG_DEBUG,
2072                                         "Interworking: realm-find-eap returned false");
2073                         }
2074                 }
2075         }
2076
2077         nai_realm_free(realm, count);
2078
2079         if (excluded)
2080                 *excluded = is_excluded;
2081
2082         return selected;
2083 }
2084
2085
2086 static struct wpa_cred * interworking_credentials_available_helper(
2087         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2088         int *excluded)
2089 {
2090         struct wpa_cred *cred, *cred2;
2091         int excluded1, excluded2 = 0;
2092
2093         if (disallowed_bssid(wpa_s, bss->bssid) ||
2094             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2095                 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2096                            MACSTR, MAC2STR(bss->bssid));
2097                 return NULL;
2098         }
2099
2100         cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2101                                                         &excluded1);
2102         cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2103                                                         &excluded2);
2104         if (cred && cred2 &&
2105             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2106                 cred = cred2;
2107                 excluded1 = excluded2;
2108         }
2109         if (!cred) {
2110                 cred = cred2;
2111                 excluded1 = excluded2;
2112         }
2113
2114         cred2 = interworking_credentials_available_roaming_consortium(
2115                 wpa_s, bss, ignore_bw, &excluded2);
2116         if (cred && cred2 &&
2117             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2118                 cred = cred2;
2119                 excluded1 = excluded2;
2120         }
2121         if (!cred) {
2122                 cred = cred2;
2123                 excluded1 = excluded2;
2124         }
2125
2126         if (excluded)
2127                 *excluded = excluded1;
2128         return cred;
2129 }
2130
2131
2132 static struct wpa_cred * interworking_credentials_available(
2133         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2134 {
2135         struct wpa_cred *cred;
2136
2137         if (excluded)
2138                 *excluded = 0;
2139         cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2140                                                          excluded);
2141         if (cred)
2142                 return cred;
2143         return interworking_credentials_available_helper(wpa_s, bss, 1,
2144                                                          excluded);
2145 }
2146
2147
2148 int domain_name_list_contains(struct wpabuf *domain_names,
2149                               const char *domain, int exact_match)
2150 {
2151         const u8 *pos, *end;
2152         size_t len;
2153
2154         len = os_strlen(domain);
2155         pos = wpabuf_head(domain_names);
2156         end = pos + wpabuf_len(domain_names);
2157
2158         while (end - pos > 1) {
2159                 u8 elen;
2160
2161                 elen = *pos++;
2162                 if (elen > end - pos)
2163                         break;
2164
2165                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2166                                   pos, elen);
2167                 if (elen == len &&
2168                     os_strncasecmp(domain, (const char *) pos, len) == 0)
2169                         return 1;
2170                 if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2171                         const char *ap = (const char *) pos;
2172                         int offset = elen - len;
2173
2174                         if (os_strncasecmp(domain, ap + offset, len) == 0)
2175                                 return 1;
2176                 }
2177
2178                 pos += elen;
2179         }
2180
2181         return 0;
2182 }
2183
2184
2185 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2186                               struct wpa_cred *cred,
2187                               struct wpabuf *domain_names)
2188 {
2189         size_t i;
2190         int ret = -1;
2191 #ifdef INTERWORKING_3GPP
2192         char nai[100], *realm;
2193
2194         char *imsi = NULL;
2195         int mnc_len = 0;
2196         if (cred->imsi)
2197                 imsi = cred->imsi;
2198 #ifdef PCSC_FUNCS
2199         else if (cred->pcsc && wpa_s->scard) {
2200                 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2201                         return -1;
2202                 imsi = wpa_s->imsi;
2203                 mnc_len = wpa_s->mnc_len;
2204         }
2205 #endif /* PCSC_FUNCS */
2206 #ifdef CONFIG_EAP_PROXY
2207         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2208                 imsi = wpa_s->imsi;
2209                 mnc_len = wpa_s->mnc_len;
2210         }
2211 #endif /* CONFIG_EAP_PROXY */
2212         if (domain_names &&
2213             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2214                 realm = os_strchr(nai, '@');
2215                 if (realm)
2216                         realm++;
2217                 wpa_msg(wpa_s, MSG_DEBUG,
2218                         "Interworking: Search for match with SIM/USIM domain %s",
2219                         realm);
2220                 if (realm &&
2221                     domain_name_list_contains(domain_names, realm, 1))
2222                         return 1;
2223                 if (realm)
2224                         ret = 0;
2225         }
2226 #endif /* INTERWORKING_3GPP */
2227
2228         if (domain_names == NULL || cred->domain == NULL)
2229                 return ret;
2230
2231         for (i = 0; i < cred->num_domain; i++) {
2232                 wpa_msg(wpa_s, MSG_DEBUG,
2233                         "Interworking: Search for match with home SP FQDN %s",
2234                         cred->domain[i]);
2235                 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2236                         return 1;
2237         }
2238
2239         return 0;
2240 }
2241
2242
2243 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2244                                 struct wpabuf *domain_names)
2245 {
2246         struct wpa_cred *cred;
2247
2248         if (domain_names == NULL || wpa_s->conf->cred == NULL)
2249                 return -1;
2250
2251         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2252                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2253                 if (res)
2254                         return res;
2255         }
2256
2257         return 0;
2258 }
2259
2260
2261 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2262 {
2263         struct wpa_bss *bss;
2264         struct wpa_ssid *ssid;
2265
2266         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2267                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2268                         if (wpas_network_disabled(wpa_s, ssid) ||
2269                             ssid->mode != WPAS_MODE_INFRA)
2270                                 continue;
2271                         if (ssid->ssid_len != bss->ssid_len ||
2272                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2273                             0)
2274                                 continue;
2275                         /*
2276                          * TODO: Consider more accurate matching of security
2277                          * configuration similarly to what is done in events.c
2278                          */
2279                         return 1;
2280                 }
2281         }
2282
2283         return 0;
2284 }
2285
2286
2287 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2288                                  struct roaming_partner *partner,
2289                                  struct wpabuf *domain_names)
2290 {
2291         wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2292                    partner->fqdn, partner->exact_match, partner->priority,
2293                    partner->country);
2294         wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2295                           wpabuf_head(domain_names),
2296                           wpabuf_len(domain_names));
2297         if (!domain_name_list_contains(domain_names, partner->fqdn,
2298                                        partner->exact_match))
2299                 return 0;
2300         /* TODO: match Country */
2301         return 1;
2302 }
2303
2304
2305 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2306                        struct wpa_bss *bss)
2307 {
2308         size_t i;
2309
2310         if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2311                 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2312                 return 128; /* cannot check preference with domain name */
2313         }
2314
2315         if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2316         {
2317                 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2318                 return 0; /* max preference for home SP network */
2319         }
2320
2321         for (i = 0; i < cred->num_roaming_partner; i++) {
2322                 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2323                                           bss->anqp->domain_name)) {
2324                         wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2325                                    cred->roaming_partner[i].priority);
2326                         return cred->roaming_partner[i].priority;
2327                 }
2328         }
2329
2330         wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2331         return 128;
2332 }
2333
2334
2335 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2336                                                   struct wpa_bss *selected,
2337                                                   struct wpa_cred *cred)
2338 {
2339         struct wpa_bss *bss;
2340         u8 best_prio, prio;
2341         struct wpa_cred *cred2;
2342
2343         /*
2344          * Check if any other BSS is operated by a more preferred roaming
2345          * partner.
2346          */
2347
2348         best_prio = roaming_prio(wpa_s, cred, selected);
2349         wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2350                    MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2351                    cred->id);
2352
2353         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2354                 if (bss == selected)
2355                         continue;
2356                 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2357                 if (!cred2)
2358                         continue;
2359                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2360                         continue;
2361                 prio = roaming_prio(wpa_s, cred2, bss);
2362                 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2363                            MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2364                            cred2->id);
2365                 if (prio < best_prio) {
2366                         int bh1, bh2, load1, load2, conn1, conn2;
2367                         bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2368                         load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2369                         conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2370                         bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2371                         load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2372                         conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2373                         wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d  new: %d %d %d",
2374                                    bh1, load1, conn1, bh2, load2, conn2);
2375                         if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2376                                 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2377                                 best_prio = prio;
2378                                 selected = bss;
2379                         }
2380                 }
2381         }
2382
2383         return selected;
2384 }
2385
2386
2387 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2388 {
2389         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2390         struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2391         unsigned int count = 0;
2392         const char *type;
2393         int res;
2394         struct wpa_cred *cred, *selected_cred = NULL;
2395         struct wpa_cred *selected_home_cred = NULL;
2396         struct wpa_cred *selected2_cred = NULL;
2397         struct wpa_cred *selected2_home_cred = NULL;
2398
2399         wpa_s->network_select = 0;
2400
2401         wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2402                    wpa_s->auto_select);
2403         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2404                 int excluded = 0;
2405                 int bh, bss_load, conn_capab;
2406                 cred = interworking_credentials_available(wpa_s, bss,
2407                                                           &excluded);
2408                 if (!cred)
2409                         continue;
2410
2411                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2412                         /*
2413                          * We currently support only HS 2.0 networks and those
2414                          * are required to use WPA2-Enterprise.
2415                          */
2416                         wpa_msg(wpa_s, MSG_DEBUG,
2417                                 "Interworking: Credential match with " MACSTR
2418                                 " but network does not use RSN",
2419                                 MAC2STR(bss->bssid));
2420                         continue;
2421                 }
2422                 if (!excluded)
2423                         count++;
2424                 res = interworking_home_sp(wpa_s, bss->anqp ?
2425                                            bss->anqp->domain_name : NULL);
2426                 if (res > 0)
2427                         type = "home";
2428                 else if (res == 0)
2429                         type = "roaming";
2430                 else
2431                         type = "unknown";
2432                 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2433                 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2434                 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2435                 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2436                         excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2437                         MAC2STR(bss->bssid), type,
2438                         bh ? " below_min_backhaul=1" : "",
2439                         bss_load ? " over_max_bss_load=1" : "",
2440                         conn_capab ? " conn_capab_missing=1" : "",
2441                         cred->id, cred->priority, cred->sp_priority);
2442                 if (excluded)
2443                         continue;
2444                 if (wpa_s->auto_select ||
2445                     (wpa_s->conf->auto_interworking &&
2446                      wpa_s->auto_network_select)) {
2447                         if (bh || bss_load || conn_capab) {
2448                                 if (selected2_cred == NULL ||
2449                                     cred_prio_cmp(cred, selected2_cred) > 0) {
2450                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2451                                         selected2 = bss;
2452                                         selected2_cred = cred;
2453                                 }
2454                                 if (res > 0 &&
2455                                     (selected2_home_cred == NULL ||
2456                                      cred_prio_cmp(cred, selected2_home_cred) >
2457                                      0)) {
2458                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2459                                         selected2_home = bss;
2460                                         selected2_home_cred = cred;
2461                                 }
2462                         } else {
2463                                 if (selected_cred == NULL ||
2464                                     cred_prio_cmp(cred, selected_cred) > 0) {
2465                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2466                                         selected = bss;
2467                                         selected_cred = cred;
2468                                 }
2469                                 if (res > 0 &&
2470                                     (selected_home_cred == NULL ||
2471                                      cred_prio_cmp(cred, selected_home_cred) >
2472                                      0)) {
2473                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2474                                         selected_home = bss;
2475                                         selected_home_cred = cred;
2476                                 }
2477                         }
2478                 }
2479         }
2480
2481         if (selected_home && selected_home != selected &&
2482             selected_home_cred &&
2483             (selected_cred == NULL ||
2484              cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2485                 /* Prefer network operated by the Home SP */
2486                 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2487                 selected = selected_home;
2488                 selected_cred = selected_home_cred;
2489         }
2490
2491         if (!selected) {
2492                 if (selected2_home) {
2493                         wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2494                         selected = selected2_home;
2495                         selected_cred = selected2_home_cred;
2496                 } else if (selected2) {
2497                         wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2498                         selected = selected2;
2499                         selected_cred = selected2_cred;
2500                 }
2501         }
2502
2503         if (count == 0) {
2504                 /*
2505                  * No matching network was found based on configured
2506                  * credentials. Check whether any of the enabled network blocks
2507                  * have matching APs.
2508                  */
2509                 if (interworking_find_network_match(wpa_s)) {
2510                         wpa_msg(wpa_s, MSG_DEBUG,
2511                                 "Interworking: Possible BSS match for enabled network configurations");
2512                         if (wpa_s->auto_select) {
2513                                 interworking_reconnect(wpa_s);
2514                                 return;
2515                         }
2516                 }
2517
2518                 if (wpa_s->auto_network_select) {
2519                         wpa_msg(wpa_s, MSG_DEBUG,
2520                                 "Interworking: Continue scanning after ANQP fetch");
2521                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2522                                                 0);
2523                         return;
2524                 }
2525
2526                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2527                         "with matching credentials found");
2528                 if (wpa_s->wpa_state == WPA_SCANNING)
2529                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2530         }
2531
2532         if (selected) {
2533                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2534                            MAC2STR(selected->bssid));
2535                 selected = pick_best_roaming_partner(wpa_s, selected,
2536                                                      selected_cred);
2537                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2538                            " (after best roaming partner selection)",
2539                            MAC2STR(selected->bssid));
2540                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2541                         MAC2STR(selected->bssid));
2542                 interworking_connect(wpa_s, selected, 0);
2543         }
2544 }
2545
2546
2547 static struct wpa_bss_anqp *
2548 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2549 {
2550         struct wpa_bss *other;
2551
2552         if (is_zero_ether_addr(bss->hessid))
2553                 return NULL; /* Cannot be in the same homegenous ESS */
2554
2555         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2556                 if (other == bss)
2557                         continue;
2558                 if (other->anqp == NULL)
2559                         continue;
2560                 if (other->anqp->roaming_consortium == NULL &&
2561                     other->anqp->nai_realm == NULL &&
2562                     other->anqp->anqp_3gpp == NULL &&
2563                     other->anqp->domain_name == NULL)
2564                         continue;
2565                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2566                         continue;
2567                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2568                         continue;
2569                 if (bss->ssid_len != other->ssid_len ||
2570                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2571                         continue;
2572
2573                 wpa_msg(wpa_s, MSG_DEBUG,
2574                         "Interworking: Share ANQP data with already fetched BSSID "
2575                         MACSTR " and " MACSTR,
2576                         MAC2STR(other->bssid), MAC2STR(bss->bssid));
2577                 other->anqp->users++;
2578                 return other->anqp;
2579         }
2580
2581         return NULL;
2582 }
2583
2584
2585 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2586 {
2587         struct wpa_bss *bss;
2588         int found = 0;
2589         const u8 *ie;
2590
2591         wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2592                    "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2593                    wpa_s->fetch_anqp_in_progress,
2594                    wpa_s->fetch_osu_icon_in_progress);
2595
2596         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2597                 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2598                 return;
2599         }
2600
2601 #ifdef CONFIG_HS20
2602         if (wpa_s->fetch_osu_icon_in_progress) {
2603                 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2604                 hs20_next_osu_icon(wpa_s);
2605                 return;
2606         }
2607 #endif /* CONFIG_HS20 */
2608
2609         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2610                 if (!(bss->caps & IEEE80211_CAP_ESS))
2611                         continue;
2612                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2613                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2614                         continue; /* AP does not support Interworking */
2615                 if (disallowed_bssid(wpa_s, bss->bssid) ||
2616                     disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2617                         continue; /* Disallowed BSS */
2618
2619                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2620                         if (bss->anqp == NULL) {
2621                                 bss->anqp = interworking_match_anqp_info(wpa_s,
2622                                                                          bss);
2623                                 if (bss->anqp) {
2624                                         /* Shared data already fetched */
2625                                         continue;
2626                                 }
2627                                 bss->anqp = wpa_bss_anqp_alloc();
2628                                 if (bss->anqp == NULL)
2629                                         break;
2630                         }
2631                         found++;
2632                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2633                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2634                                 MACSTR, MAC2STR(bss->bssid));
2635                         interworking_anqp_send_req(wpa_s, bss);
2636                         break;
2637                 }
2638         }
2639
2640         if (found == 0) {
2641 #ifdef CONFIG_HS20
2642                 if (wpa_s->fetch_osu_info) {
2643                         if (wpa_s->num_prov_found == 0 &&
2644                             wpa_s->fetch_osu_waiting_scan &&
2645                             wpa_s->num_osu_scans < 3) {
2646                                 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2647                                 hs20_start_osu_scan(wpa_s);
2648                                 return;
2649                         }
2650                         wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2651                         hs20_osu_icon_fetch(wpa_s);
2652                         return;
2653                 }
2654 #endif /* CONFIG_HS20 */
2655                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2656                 wpa_s->fetch_anqp_in_progress = 0;
2657                 if (wpa_s->network_select)
2658                         interworking_select_network(wpa_s);
2659         }
2660 }
2661
2662
2663 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2664 {
2665         struct wpa_bss *bss;
2666
2667         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2668                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2669
2670         wpa_s->fetch_anqp_in_progress = 1;
2671
2672         /*
2673          * Start actual ANQP operation from eloop call to make sure the loop
2674          * does not end up using excessive recursion.
2675          */
2676         eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2677 }
2678
2679
2680 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2681 {
2682         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2683                 return 0;
2684
2685         wpa_s->network_select = 0;
2686         wpa_s->fetch_all_anqp = 1;
2687         wpa_s->fetch_osu_info = 0;
2688
2689         interworking_start_fetch_anqp(wpa_s);
2690
2691         return 0;
2692 }
2693
2694
2695 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2696 {
2697         if (!wpa_s->fetch_anqp_in_progress)
2698                 return;
2699
2700         wpa_s->fetch_anqp_in_progress = 0;
2701 }
2702
2703
2704 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2705                   u16 info_ids[], size_t num_ids, u32 subtypes)
2706 {
2707         struct wpabuf *buf;
2708         struct wpabuf *hs20_buf = NULL;
2709         int ret = 0;
2710         int freq;
2711         struct wpa_bss *bss;
2712         int res;
2713
2714         bss = wpa_bss_get_bssid(wpa_s, dst);
2715         if (!bss) {
2716                 wpa_printf(MSG_WARNING,
2717                            "ANQP: Cannot send query to unknown BSS "
2718                            MACSTR, MAC2STR(dst));
2719                 return -1;
2720         }
2721
2722         wpa_bss_anqp_unshare_alloc(bss);
2723         freq = bss->freq;
2724
2725         wpa_msg(wpa_s, MSG_DEBUG,
2726                 "ANQP: Query Request to " MACSTR " for %u id(s)",
2727                 MAC2STR(dst), (unsigned int) num_ids);
2728
2729 #ifdef CONFIG_HS20
2730         if (subtypes != 0) {
2731                 hs20_buf = wpabuf_alloc(100);
2732                 if (hs20_buf == NULL)
2733                         return -1;
2734                 hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf);
2735         }
2736 #endif /* CONFIG_HS20 */
2737
2738         buf = anqp_build_req(info_ids, num_ids, hs20_buf);
2739         wpabuf_free(hs20_buf);
2740         if (buf == NULL)
2741                 return -1;
2742
2743         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2744         if (res < 0) {
2745                 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2746                 wpabuf_free(buf);
2747                 ret = -1;
2748         } else {
2749                 wpa_msg(wpa_s, MSG_DEBUG,
2750                         "ANQP: Query started with dialog token %u", res);
2751         }
2752
2753         return ret;
2754 }
2755
2756
2757 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2758                            struct wpa_bss_anqp *anqp, u16 info_id,
2759                            const u8 *data, size_t slen)
2760 {
2761         struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2762
2763         if (!anqp)
2764                 return;
2765
2766         dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2767                          list) {
2768                 if (tmp->infoid == info_id) {
2769                         elem = tmp;
2770                         break;
2771                 }
2772         }
2773
2774         if (!elem) {
2775                 elem = os_zalloc(sizeof(*elem));
2776                 if (!elem)
2777                         return;
2778                 elem->infoid = info_id;
2779                 dl_list_add(&anqp->anqp_elems, &elem->list);
2780         } else {
2781                 wpabuf_free(elem->payload);
2782         }
2783
2784         elem->payload = wpabuf_alloc_copy(data, slen);
2785         if (!elem->payload) {
2786                 dl_list_del(&elem->list);
2787                 os_free(elem);
2788         }
2789 }
2790
2791
2792 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2793                                             struct wpa_bss *bss, const u8 *sa,
2794                                             u16 info_id,
2795                                             const u8 *data, size_t slen,
2796                                             u8 dialog_token)
2797 {
2798         const u8 *pos = data;
2799         struct wpa_bss_anqp *anqp = NULL;
2800 #ifdef CONFIG_HS20
2801         u8 type;
2802 #endif /* CONFIG_HS20 */
2803
2804         if (bss)
2805                 anqp = bss->anqp;
2806
2807         switch (info_id) {
2808         case ANQP_CAPABILITY_LIST:
2809                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2810                         " ANQP Capability list", MAC2STR(sa));
2811                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2812                                   pos, slen);
2813                 if (anqp) {
2814                         wpabuf_free(anqp->capability_list);
2815                         anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2816                 }
2817                 break;
2818         case ANQP_VENUE_NAME:
2819                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2820                         " Venue Name", MAC2STR(sa));
2821                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2822                 if (anqp) {
2823                         wpabuf_free(anqp->venue_name);
2824                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2825                 }
2826                 break;
2827         case ANQP_NETWORK_AUTH_TYPE:
2828                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2829                         " Network Authentication Type information",
2830                         MAC2STR(sa));
2831                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2832                                   "Type", pos, slen);
2833                 if (anqp) {
2834                         wpabuf_free(anqp->network_auth_type);
2835                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2836                 }
2837                 break;
2838         case ANQP_ROAMING_CONSORTIUM:
2839                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2840                         " Roaming Consortium list", MAC2STR(sa));
2841                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2842                                   pos, slen);
2843                 if (anqp) {
2844                         wpabuf_free(anqp->roaming_consortium);
2845                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2846                 }
2847                 break;
2848         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2849                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2850                         " IP Address Type Availability information",
2851                         MAC2STR(sa));
2852                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2853                             pos, slen);
2854                 if (anqp) {
2855                         wpabuf_free(anqp->ip_addr_type_availability);
2856                         anqp->ip_addr_type_availability =
2857                                 wpabuf_alloc_copy(pos, slen);
2858                 }
2859                 break;
2860         case ANQP_NAI_REALM:
2861                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2862                         " NAI Realm list", MAC2STR(sa));
2863                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2864                 if (anqp) {
2865                         wpabuf_free(anqp->nai_realm);
2866                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2867                 }
2868                 break;
2869         case ANQP_3GPP_CELLULAR_NETWORK:
2870                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2871                         " 3GPP Cellular Network information", MAC2STR(sa));
2872                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2873                                   pos, slen);
2874                 if (anqp) {
2875                         wpabuf_free(anqp->anqp_3gpp);
2876                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2877                 }
2878                 break;
2879         case ANQP_DOMAIN_NAME:
2880                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2881                         " Domain Name list", MAC2STR(sa));
2882                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2883                 if (anqp) {
2884                         wpabuf_free(anqp->domain_name);
2885                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2886                 }
2887                 break;
2888         case ANQP_VENDOR_SPECIFIC:
2889                 if (slen < 3)
2890                         return;
2891
2892                 switch (WPA_GET_BE24(pos)) {
2893 #ifdef CONFIG_HS20
2894                 case OUI_WFA:
2895                         pos += 3;
2896                         slen -= 3;
2897
2898                         if (slen < 1)
2899                                 return;
2900                         type = *pos++;
2901                         slen--;
2902
2903                         switch (type) {
2904                         case HS20_ANQP_OUI_TYPE:
2905                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2906                                                              pos, slen,
2907                                                              dialog_token);
2908                                 break;
2909                         default:
2910                                 wpa_msg(wpa_s, MSG_DEBUG,
2911                                         "HS20: Unsupported ANQP vendor type %u",
2912                                         type);
2913                                 break;
2914                         }
2915                         break;
2916 #endif /* CONFIG_HS20 */
2917                 default:
2918                         wpa_msg(wpa_s, MSG_DEBUG,
2919                                 "Interworking: Unsupported vendor-specific ANQP OUI %06x",
2920                                 WPA_GET_BE24(pos));
2921                         return;
2922                 }
2923                 break;
2924         default:
2925                 wpa_msg(wpa_s, MSG_DEBUG,
2926                         "Interworking: Unsupported ANQP Info ID %u", info_id);
2927                 anqp_add_extra(wpa_s, anqp, info_id, data, slen);
2928                 break;
2929         }
2930 }
2931
2932
2933 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2934                   enum gas_query_result result,
2935                   const struct wpabuf *adv_proto,
2936                   const struct wpabuf *resp, u16 status_code)
2937 {
2938         struct wpa_supplicant *wpa_s = ctx;
2939         const u8 *pos;
2940         const u8 *end;
2941         u16 info_id;
2942         u16 slen;
2943         struct wpa_bss *bss = NULL, *tmp;
2944         const char *anqp_result = "SUCCESS";
2945
2946         wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2947                    " dialog_token=%u result=%d status_code=%u",
2948                    MAC2STR(dst), dialog_token, result, status_code);
2949         if (result != GAS_QUERY_SUCCESS) {
2950 #ifdef CONFIG_HS20
2951                 if (wpa_s->fetch_osu_icon_in_progress)
2952                         hs20_icon_fetch_failed(wpa_s);
2953 #endif /* CONFIG_HS20 */
2954                 anqp_result = "FAILURE";
2955                 goto out;
2956         }
2957
2958         pos = wpabuf_head(adv_proto);
2959         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2960             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2961                 wpa_msg(wpa_s, MSG_DEBUG,
2962                         "ANQP: Unexpected Advertisement Protocol in response");
2963 #ifdef CONFIG_HS20
2964                 if (wpa_s->fetch_osu_icon_in_progress)
2965                         hs20_icon_fetch_failed(wpa_s);
2966 #endif /* CONFIG_HS20 */
2967                 anqp_result = "INVALID_FRAME";
2968                 goto out;
2969         }
2970
2971         /*
2972          * If possible, select the BSS entry based on which BSS entry was used
2973          * for the request. This can help in cases where multiple BSS entries
2974          * may exist for the same AP.
2975          */
2976         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2977                 if (tmp == wpa_s->interworking_gas_bss &&
2978                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2979                         bss = tmp;
2980                         break;
2981                 }
2982         }
2983         if (bss == NULL)
2984                 bss = wpa_bss_get_bssid(wpa_s, dst);
2985
2986         pos = wpabuf_head(resp);
2987         end = pos + wpabuf_len(resp);
2988
2989         while (pos < end) {
2990                 unsigned int left = end - pos;
2991
2992                 if (left < 4) {
2993                         wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
2994                         anqp_result = "INVALID_FRAME";
2995                         goto out_parse_done;
2996                 }
2997                 info_id = WPA_GET_LE16(pos);
2998                 pos += 2;
2999                 slen = WPA_GET_LE16(pos);
3000                 pos += 2;
3001                 left -= 4;
3002                 if (left < slen) {
3003                         wpa_msg(wpa_s, MSG_DEBUG,
3004                                 "ANQP: Invalid element length for Info ID %u",
3005                                 info_id);
3006                         anqp_result = "INVALID_FRAME";
3007                         goto out_parse_done;
3008                 }
3009                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
3010                                                 slen, dialog_token);
3011                 pos += slen;
3012         }
3013
3014 out_parse_done:
3015 #ifdef CONFIG_HS20
3016         hs20_notify_parse_done(wpa_s);
3017 #endif /* CONFIG_HS20 */
3018 out:
3019         wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3020                 MAC2STR(dst), anqp_result);
3021 }
3022
3023
3024 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3025                                           struct wpa_scan_results *scan_res)
3026 {
3027         wpa_msg(wpa_s, MSG_DEBUG,
3028                 "Interworking: Scan results available - start ANQP fetch");
3029         interworking_start_fetch_anqp(wpa_s);
3030 }
3031
3032
3033 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3034                         int *freqs)
3035 {
3036         interworking_stop_fetch_anqp(wpa_s);
3037         wpa_s->network_select = 1;
3038         wpa_s->auto_network_select = 0;
3039         wpa_s->auto_select = !!auto_select;
3040         wpa_s->fetch_all_anqp = 0;
3041         wpa_s->fetch_osu_info = 0;
3042         wpa_msg(wpa_s, MSG_DEBUG,
3043                 "Interworking: Start scan for network selection");
3044         wpa_s->scan_res_handler = interworking_scan_res_handler;
3045         wpa_s->normal_scans = 0;
3046         wpa_s->scan_req = MANUAL_SCAN_REQ;
3047         os_free(wpa_s->manual_scan_freqs);
3048         wpa_s->manual_scan_freqs = freqs;
3049         wpa_s->after_wps = 0;
3050         wpa_s->known_wps_freq = 0;
3051         wpa_supplicant_req_scan(wpa_s, 0, 0);
3052
3053         return 0;
3054 }
3055
3056
3057 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3058                         enum gas_query_result result,
3059                         const struct wpabuf *adv_proto,
3060                         const struct wpabuf *resp, u16 status_code)
3061 {
3062         struct wpa_supplicant *wpa_s = ctx;
3063         struct wpabuf *n;
3064
3065         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3066                 " dialog_token=%d status_code=%d resp_len=%d",
3067                 MAC2STR(addr), dialog_token, status_code,
3068                 resp ? (int) wpabuf_len(resp) : -1);
3069         if (!resp)
3070                 return;
3071
3072         n = wpabuf_dup(resp);
3073         if (n == NULL)
3074                 return;
3075         wpabuf_free(wpa_s->prev_gas_resp);
3076         wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3077         os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3078         wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3079         wpa_s->last_gas_resp = n;
3080         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3081         wpa_s->last_gas_dialog_token = dialog_token;
3082 }
3083
3084
3085 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3086                      const struct wpabuf *adv_proto,
3087                      const struct wpabuf *query)
3088 {
3089         struct wpabuf *buf;
3090         int ret = 0;
3091         int freq;
3092         struct wpa_bss *bss;
3093         int res;
3094         size_t len;
3095         u8 query_resp_len_limit = 0;
3096
3097         freq = wpa_s->assoc_freq;
3098         bss = wpa_bss_get_bssid(wpa_s, dst);
3099         if (bss)
3100                 freq = bss->freq;
3101         if (freq <= 0)
3102                 return -1;
3103
3104         wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3105                 MAC2STR(dst), freq);
3106         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3107         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3108
3109         len = 3 + wpabuf_len(adv_proto) + 2;
3110         if (query)
3111                 len += wpabuf_len(query);
3112         buf = gas_build_initial_req(0, len);
3113         if (buf == NULL)
3114                 return -1;
3115
3116         /* Advertisement Protocol IE */
3117         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3118         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3119         wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3120         wpabuf_put_buf(buf, adv_proto);
3121
3122         /* GAS Query */
3123         if (query) {
3124                 wpabuf_put_le16(buf, wpabuf_len(query));
3125                 wpabuf_put_buf(buf, query);
3126         } else
3127                 wpabuf_put_le16(buf, 0);
3128
3129         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3130         if (res < 0) {
3131                 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3132                 wpabuf_free(buf);
3133                 ret = -1;
3134         } else
3135                 wpa_msg(wpa_s, MSG_DEBUG,
3136                         "GAS: Query started with dialog token %u", res);
3137
3138         return ret;
3139 }