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             wpa_config_set(ssid, "proto", "RSN", 0) < 0 ||
 955             wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 956                 return -1;
 957         return 0;
 958 }
 959
 960
 961 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 962                                      struct wpa_cred *cred,
 963                                      struct wpa_bss *bss, int only_add)
 964 {
 965 #ifdef INTERWORKING_3GPP
 966         struct wpa_ssid *ssid;
 967         int eap_type;
 968         int res;
 969         char prefix;
 970
 971         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 972                 return -1;
 973
 974         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
 975                 " (3GPP)", MAC2STR(bss->bssid));
 976
 977         if (already_connected(wpa_s, cred, bss)) {
 978                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
 979                         MAC2STR(bss->bssid));
 980                 return wpa_s->current_ssid->id;
 981         }
 982
 983         remove_duplicate_network(wpa_s, cred, bss);
 984
 985         ssid = wpa_config_add_network(wpa_s->conf);
 986         if (ssid == NULL)
 987                 return -1;
 988         ssid->parent_cred = cred;
 989
 990         wpas_notify_network_added(wpa_s, ssid);
 991         wpa_config_set_network_defaults(ssid);
 992         ssid->priority = cred->priority;
 993         ssid->temporary = 1;
 994         ssid->ssid = os_zalloc(bss->ssid_len + 1);
 995         if (ssid->ssid == NULL)
 996                 goto fail;
 997         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 998         ssid->ssid_len = bss->ssid_len;
 999         ssid->eap.sim_num = cred->sim_num;
1000
1001         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1002                 goto fail;
1003
1004         eap_type = EAP_TYPE_SIM;
1005         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1006                 eap_type = EAP_TYPE_AKA;
1007         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1008                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1009                     cred->eap_method[0].method == EAP_TYPE_AKA ||
1010                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1011                         eap_type = cred->eap_method[0].method;
1012         }
1013
1014         switch (eap_type) {
1015         case EAP_TYPE_SIM:
1016                 prefix = '1';
1017                 res = wpa_config_set(ssid, "eap", "SIM", 0);
1018                 break;
1019         case EAP_TYPE_AKA:
1020                 prefix = '0';
1021                 res = wpa_config_set(ssid, "eap", "AKA", 0);
1022                 break;
1023         case EAP_TYPE_AKA_PRIME:
1024                 prefix = '6';
1025                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
1026                 break;
1027         default:
1028                 res = -1;
1029                 break;
1030         }
1031         if (res < 0) {
1032                 wpa_msg(wpa_s, MSG_DEBUG,
1033                         "Selected EAP method (%d) not supported", eap_type);
1034                 goto fail;
1035         }
1036
1037         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1038                 wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1039                 goto fail;
1040         }
1041
1042         if (cred->milenage && cred->milenage[0]) {
1043                 if (wpa_config_set_quoted(ssid, "password",
1044                                           cred->milenage) < 0)
1045                         goto fail;
1046         } else if (cred->pcsc) {
1047                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1048                         goto fail;
1049                 if (wpa_s->conf->pcsc_pin &&
1050                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1051                     < 0)
1052                         goto fail;
1053         }
1054
1055         wpa_s->next_ssid = ssid;
1056         wpa_config_update_prio_list(wpa_s->conf);
1057         if (!only_add)
1058                 interworking_reconnect(wpa_s);
1059
1060         return ssid->id;
1061
1062 fail:
1063         wpas_notify_network_removed(wpa_s, ssid);
1064         wpa_config_remove_network(wpa_s->conf, ssid->id);
1065 #endif /* INTERWORKING_3GPP */
1066         return -1;
1067 }
1068
1069
1070 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
1071                                             size_t rc_len)
1072 {
1073         const u8 *pos, *end;
1074         u8 lens;
1075
1076         if (ie == NULL)
1077                 return 0;
1078
1079         pos = ie + 2;
1080         end = ie + 2 + ie[1];
1081
1082         /* Roaming Consortium element:
1083          * Number of ANQP OIs
1084          * OI #1 and #2 lengths
1085          * OI #1, [OI #2], [OI #3]
1086          */
1087
1088         if (end - pos < 2)
1089                 return 0;
1090
1091         pos++; /* skip Number of ANQP OIs */
1092         lens = *pos++;
1093         if ((lens & 0x0f) + (lens >> 4) > end - pos)
1094                 return 0;
1095
1096         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1097                 return 1;
1098         pos += lens & 0x0f;
1099
1100         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1101                 return 1;
1102         pos += lens >> 4;
1103
1104         if (pos < end && (size_t) (end - pos) == rc_len &&
1105             os_memcmp(pos, rc_id, rc_len) == 0)
1106                 return 1;
1107
1108         return 0;
1109 }
1110
1111
1112 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1113                                          const u8 *rc_id, size_t rc_len)
1114 {
1115         const u8 *pos, *end;
1116         u8 len;
1117
1118         if (anqp == NULL)
1119                 return 0;
1120
1121         pos = wpabuf_head(anqp);
1122         end = pos + wpabuf_len(anqp);
1123
1124         /* Set of <OI Length, OI> duples */
1125         while (pos < end) {
1126                 len = *pos++;
1127                 if (len > end - pos)
1128                         break;
1129                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1130                         return 1;
1131                 pos += len;
1132         }
1133
1134         return 0;
1135 }
1136
1137
1138 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1139                                     const u8 *rc_id, size_t rc_len)
1140 {
1141         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1142                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1143 }
1144
1145
1146 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1147 {
1148         const u8 *ie;
1149
1150         if (cred->required_roaming_consortium_len == 0)
1151                 return 0;
1152
1153         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1154
1155         if (ie == NULL &&
1156             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1157                 return 1;
1158
1159         return !roaming_consortium_match(ie,
1160                                          bss->anqp ?
1161                                          bss->anqp->roaming_consortium : NULL,
1162                                          cred->required_roaming_consortium,
1163                                          cred->required_roaming_consortium_len);
1164 }
1165
1166
1167 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1168 {
1169         size_t i;
1170
1171         if (!cred->excluded_ssid)
1172                 return 0;
1173
1174         for (i = 0; i < cred->num_excluded_ssid; i++) {
1175                 struct excluded_ssid *e = &cred->excluded_ssid[i];
1176                 if (bss->ssid_len == e->ssid_len &&
1177                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1178                         return 1;
1179         }
1180
1181         return 0;
1182 }
1183
1184
1185 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1186                                    struct wpa_cred *cred, struct wpa_bss *bss)
1187 {
1188 #ifdef CONFIG_HS20
1189         int res;
1190         unsigned int dl_bandwidth, ul_bandwidth;
1191         const u8 *wan;
1192         u8 wan_info, dl_load, ul_load;
1193         u16 lmd;
1194         u32 ul_speed, dl_speed;
1195
1196         if (!cred->min_dl_bandwidth_home &&
1197             !cred->min_ul_bandwidth_home &&
1198             !cred->min_dl_bandwidth_roaming &&
1199             !cred->min_ul_bandwidth_roaming)
1200                 return 0; /* No bandwidth constraint specified */
1201
1202         if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1203                 return 0; /* No WAN Metrics known - ignore constraint */
1204
1205         wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1206         wan_info = wan[0];
1207         if (wan_info & BIT(3))
1208                 return 1; /* WAN link at capacity */
1209         lmd = WPA_GET_LE16(wan + 11);
1210         if (lmd == 0)
1211                 return 0; /* Downlink/Uplink Load was not measured */
1212         dl_speed = WPA_GET_LE32(wan + 1);
1213         ul_speed = WPA_GET_LE32(wan + 5);
1214         dl_load = wan[9];
1215         ul_load = wan[10];
1216
1217         if (dl_speed >= 0xffffff)
1218                 dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1219         else
1220                 dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1221
1222         if (ul_speed >= 0xffffff)
1223                 ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1224         else
1225                 ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1226
1227         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1228                                         bss->anqp->domain_name : NULL);
1229         if (res > 0) {
1230                 if (cred->min_dl_bandwidth_home > dl_bandwidth)
1231                         return 1;
1232                 if (cred->min_ul_bandwidth_home > ul_bandwidth)
1233                         return 1;
1234         } else {
1235                 if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1236                         return 1;
1237                 if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1238                         return 1;
1239         }
1240 #endif /* CONFIG_HS20 */
1241
1242         return 0;
1243 }
1244
1245
1246 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1247                                   struct wpa_cred *cred, struct wpa_bss *bss)
1248 {
1249         const u8 *ie;
1250         int res;
1251
1252         if (!cred->max_bss_load)
1253                 return 0; /* No BSS Load constraint specified */
1254
1255         ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1256         if (ie == NULL || ie[1] < 3)
1257                 return 0; /* No BSS Load advertised */
1258
1259         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1260                                         bss->anqp->domain_name : NULL);
1261         if (res <= 0)
1262                 return 0; /* Not a home network */
1263
1264         return ie[4] > cred->max_bss_load;
1265 }
1266
1267
1268 #ifdef CONFIG_HS20
1269
1270 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1271 {
1272         while (end - pos >= 4) {
1273                 if (pos[0] == proto && pos[3] == 1 /* Open */)
1274                         return 1;
1275                 pos += 4;
1276         }
1277
1278         return 0;
1279 }
1280
1281
1282 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1283                                 u16 port)
1284 {
1285         while (end - pos >= 4) {
1286                 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1287                     pos[3] == 1 /* Open */)
1288                         return 1;
1289                 pos += 4;
1290         }
1291
1292         return 0;
1293 }
1294
1295 #endif /* CONFIG_HS20 */
1296
1297
1298 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1299                                    struct wpa_cred *cred, struct wpa_bss *bss)
1300 {
1301 #ifdef CONFIG_HS20
1302         int res;
1303         const u8 *capab, *end;
1304         unsigned int i, j;
1305         int *ports;
1306
1307         if (!cred->num_req_conn_capab)
1308                 return 0; /* No connection capability constraint specified */
1309
1310         if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1311                 return 0; /* No Connection Capability known - ignore constraint
1312                            */
1313
1314         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1315                                         bss->anqp->domain_name : NULL);
1316         if (res > 0)
1317                 return 0; /* No constraint in home network */
1318
1319         capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1320         end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1321
1322         for (i = 0; i < cred->num_req_conn_capab; i++) {
1323                 ports = cred->req_conn_capab_port[i];
1324                 if (!ports) {
1325                         if (!has_proto_match(capab, end,
1326                                              cred->req_conn_capab_proto[i]))
1327                                 return 1;
1328                 } else {
1329                         for (j = 0; ports[j] > -1; j++) {
1330                                 if (!has_proto_port_match(
1331                                             capab, end,
1332                                             cred->req_conn_capab_proto[i],
1333                                             ports[j]))
1334                                         return 1;
1335                         }
1336                 }
1337         }
1338 #endif /* CONFIG_HS20 */
1339
1340         return 0;
1341 }
1342
1343
1344 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1345         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1346         int *excluded)
1347 {
1348         struct wpa_cred *cred, *selected = NULL;
1349         const u8 *ie;
1350         int is_excluded = 0;
1351
1352         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1353
1354         if (ie == NULL &&
1355             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1356                 return NULL;
1357
1358         if (wpa_s->conf->cred == NULL)
1359                 return NULL;
1360
1361         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1362                 if (cred->roaming_consortium_len == 0)
1363                         continue;
1364
1365                 if (!roaming_consortium_match(ie,
1366                                               bss->anqp ?
1367                                               bss->anqp->roaming_consortium :
1368                                               NULL,
1369                                               cred->roaming_consortium,
1370                                               cred->roaming_consortium_len))
1371                         continue;
1372
1373                 if (cred_no_required_oi_match(cred, bss))
1374                         continue;
1375                 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1376                         continue;
1377                 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1378                         continue;
1379                 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1380                         continue;
1381                 if (cred_excluded_ssid(cred, bss)) {
1382                         if (excluded == NULL)
1383                                 continue;
1384                         if (selected == NULL) {
1385                                 selected = cred;
1386                                 is_excluded = 1;
1387                         }
1388                 } else {
1389                         if (selected == NULL || is_excluded ||
1390                             cred_prio_cmp(selected, cred) < 0) {
1391                                 selected = cred;
1392                                 is_excluded = 0;
1393                         }
1394                 }
1395         }
1396
1397         if (excluded)
1398                 *excluded = is_excluded;
1399
1400         return selected;
1401 }
1402
1403
1404 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1405                                        struct wpa_cred *cred, int ttls)
1406 {
1407         if (cred->eap_method) {
1408                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1409                         cred->eap_method->method == EAP_TYPE_TTLS;
1410
1411                 os_free(ssid->eap.eap_methods);
1412                 ssid->eap.eap_methods =
1413                         os_malloc(sizeof(struct eap_method_type) * 2);
1414                 if (ssid->eap.eap_methods == NULL)
1415                         return -1;
1416                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1417                           sizeof(*cred->eap_method));
1418                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1419                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1420         }
1421
1422         if (ttls && cred->username && cred->username[0]) {
1423                 const char *pos;
1424                 char *anon;
1425                 /* Use anonymous NAI in Phase 1 */
1426                 pos = os_strchr(cred->username, '@');
1427                 if (pos) {
1428                         size_t buflen = 9 + os_strlen(pos) + 1;
1429                         anon = os_malloc(buflen);
1430                         if (anon == NULL)
1431                                 return -1;
1432                         os_snprintf(anon, buflen, "anonymous%s", pos);
1433                 } else if (cred->realm) {
1434                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1435                         anon = os_malloc(buflen);
1436                         if (anon == NULL)
1437                                 return -1;
1438                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1439                 } else {
1440                         anon = os_strdup("anonymous");
1441                         if (anon == NULL)
1442                                 return -1;
1443                 }
1444                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1445                     0) {
1446                         os_free(anon);
1447                         return -1;
1448                 }
1449                 os_free(anon);
1450         }
1451
1452         if (!ttls && cred->username && cred->username[0] && cred->realm &&
1453             !os_strchr(cred->username, '@')) {
1454                 char *id;
1455                 size_t buflen;
1456                 int res;
1457
1458                 buflen = os_strlen(cred->username) + 1 +
1459                         os_strlen(cred->realm) + 1;
1460
1461                 id = os_malloc(buflen);
1462                 if (!id)
1463                         return -1;
1464                 os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm);
1465                 res = wpa_config_set_quoted(ssid, "identity", id);
1466                 os_free(id);
1467                 if (res < 0)
1468                         return -1;
1469         } else if (cred->username && cred->username[0] &&
1470             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1471                 return -1;
1472
1473         if (cred->password && cred->password[0]) {
1474                 if (cred->ext_password &&
1475                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1476                         return -1;
1477                 if (!cred->ext_password &&
1478                     wpa_config_set_quoted(ssid, "password", cred->password) <
1479                     0)
1480                         return -1;
1481         }
1482
1483         if (cred->client_cert && cred->client_cert[0] &&
1484             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1485                 return -1;
1486
1487 #ifdef ANDROID
1488         if (cred->private_key &&
1489             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1490                 /* Use OpenSSL engine configuration for Android keystore */
1491                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1492                     wpa_config_set_quoted(ssid, "key_id",
1493                                           cred->private_key + 11) < 0 ||
1494                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1495                         return -1;
1496         } else
1497 #endif /* ANDROID */
1498         if (cred->private_key && cred->private_key[0] &&
1499             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1500                 return -1;
1501
1502         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1503             wpa_config_set_quoted(ssid, "private_key_passwd",
1504                                   cred->private_key_passwd) < 0)
1505                 return -1;
1506
1507         if (cred->phase1) {
1508                 os_free(ssid->eap.phase1);
1509                 ssid->eap.phase1 = os_strdup(cred->phase1);
1510         }
1511         if (cred->phase2) {
1512                 os_free(ssid->eap.phase2);
1513                 ssid->eap.phase2 = os_strdup(cred->phase2);
1514         }
1515
1516         if (cred->ca_cert && cred->ca_cert[0] &&
1517             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1518                 return -1;
1519
1520         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1521             wpa_config_set_quoted(ssid, "domain_suffix_match",
1522                                   cred->domain_suffix_match) < 0)
1523                 return -1;
1524
1525         ssid->eap.ocsp = cred->ocsp;
1526
1527         return 0;
1528 }
1529
1530
1531 static int interworking_connect_roaming_consortium(
1532         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1533         struct wpa_bss *bss, int only_add)
1534 {
1535         struct wpa_ssid *ssid;
1536
1537         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1538                 " based on roaming consortium match", MAC2STR(bss->bssid));
1539
1540         if (already_connected(wpa_s, cred, bss)) {
1541                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1542                         MAC2STR(bss->bssid));
1543                 return wpa_s->current_ssid->id;
1544         }
1545
1546         remove_duplicate_network(wpa_s, cred, bss);
1547
1548         ssid = wpa_config_add_network(wpa_s->conf);
1549         if (ssid == NULL)
1550                 return -1;
1551         ssid->parent_cred = cred;
1552         wpas_notify_network_added(wpa_s, ssid);
1553         wpa_config_set_network_defaults(ssid);
1554         ssid->priority = cred->priority;
1555         ssid->temporary = 1;
1556         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1557         if (ssid->ssid == NULL)
1558                 goto fail;
1559         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1560         ssid->ssid_len = bss->ssid_len;
1561
1562         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1563                 goto fail;
1564
1565         if (cred->eap_method == NULL) {
1566                 wpa_msg(wpa_s, MSG_DEBUG,
1567                         "Interworking: No EAP method set for credential using roaming consortium");
1568                 goto fail;
1569         }
1570
1571         if (interworking_set_eap_params(
1572                     ssid, cred,
1573                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1574                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1575                 goto fail;
1576
1577         wpa_s->next_ssid = ssid;
1578         wpa_config_update_prio_list(wpa_s->conf);
1579         if (!only_add)
1580                 interworking_reconnect(wpa_s);
1581
1582         return ssid->id;
1583
1584 fail:
1585         wpas_notify_network_removed(wpa_s, ssid);
1586         wpa_config_remove_network(wpa_s->conf, ssid->id);
1587         return -1;
1588 }
1589
1590
1591 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1592                          int only_add)
1593 {
1594         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1595         struct wpa_ssid *ssid;
1596         struct nai_realm *realm;
1597         struct nai_realm_eap *eap = NULL;
1598         u16 count, i;
1599         char buf[100];
1600         int excluded = 0, *excl = &excluded;
1601         const char *name;
1602
1603         if (wpa_s->conf->cred == NULL || bss == NULL)
1604                 return -1;
1605         if (disallowed_bssid(wpa_s, bss->bssid) ||
1606             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1607                 wpa_msg(wpa_s, MSG_DEBUG,
1608                         "Interworking: Reject connection to disallowed BSS "
1609                         MACSTR, MAC2STR(bss->bssid));
1610                 return -1;
1611         }
1612
1613         wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1614                    " for connection",
1615                    MAC2STR(bss->bssid));
1616
1617         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1618                 /*
1619                  * We currently support only HS 2.0 networks and those are
1620                  * required to use WPA2-Enterprise.
1621                  */
1622                 wpa_msg(wpa_s, MSG_DEBUG,
1623                         "Interworking: Network does not use RSN");
1624                 return -1;
1625         }
1626
1627         cred_rc = interworking_credentials_available_roaming_consortium(
1628                 wpa_s, bss, 0, excl);
1629         if (cred_rc) {
1630                 wpa_msg(wpa_s, MSG_DEBUG,
1631                         "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1632                         cred_rc->priority, cred_rc->sp_priority);
1633                 if (excl && !(*excl))
1634                         excl = NULL;
1635         }
1636
1637         cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1638         if (cred) {
1639                 wpa_msg(wpa_s, MSG_DEBUG,
1640                         "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1641                         cred->priority, cred->sp_priority);
1642                 if (excl && !(*excl))
1643                         excl = NULL;
1644         }
1645
1646         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1647                                                             excl);
1648         if (cred_3gpp) {
1649                 wpa_msg(wpa_s, MSG_DEBUG,
1650                         "Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1651                         cred_3gpp->priority, cred_3gpp->sp_priority);
1652                 if (excl && !(*excl))
1653                         excl = NULL;
1654         }
1655
1656         if (!cred_rc && !cred && !cred_3gpp) {
1657                 wpa_msg(wpa_s, MSG_DEBUG,
1658                         "Interworking: No full credential matches - consider options without BW(etc.) limits");
1659                 cred_rc = interworking_credentials_available_roaming_consortium(
1660                         wpa_s, bss, 1, excl);
1661                 if (cred_rc) {
1662                         wpa_msg(wpa_s, MSG_DEBUG,
1663                                 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1664                                 cred_rc->priority, cred_rc->sp_priority);
1665                         if (excl && !(*excl))
1666                                 excl = NULL;
1667                 }
1668
1669                 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1670                                                                 excl);
1671                 if (cred) {
1672                         wpa_msg(wpa_s, MSG_DEBUG,
1673                                 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1674                                 cred->priority, cred->sp_priority);
1675                         if (excl && !(*excl))
1676                                 excl = NULL;
1677                 }
1678
1679                 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1680                                                                     1, excl);
1681                 if (cred_3gpp) {
1682                         wpa_msg(wpa_s, MSG_DEBUG,
1683                                 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1684                                 cred_3gpp->priority, cred_3gpp->sp_priority);
1685                         if (excl && !(*excl))
1686                                 excl = NULL;
1687                 }
1688         }
1689
1690         if (cred_rc &&
1691             (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1692             (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1693                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1694                                                                bss, only_add);
1695
1696         if (cred_3gpp &&
1697             (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1698                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1699                                                  only_add);
1700         }
1701
1702         if (cred == NULL) {
1703                 wpa_msg(wpa_s, MSG_DEBUG,
1704                         "Interworking: No matching credentials found for "
1705                         MACSTR, MAC2STR(bss->bssid));
1706                 return -1;
1707         }
1708
1709         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1710                                 &count);
1711         if (realm == NULL) {
1712                 wpa_msg(wpa_s, MSG_DEBUG,
1713                         "Interworking: Could not parse NAI Realm list from "
1714                         MACSTR, MAC2STR(bss->bssid));
1715                 return -1;
1716         }
1717
1718         for (i = 0; i < count; i++) {
1719                 if (!nai_realm_match(&realm[i], cred->realm))
1720                         continue;
1721                 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1722                 if (eap)
1723                         break;
1724         }
1725
1726         if (!eap) {
1727                 wpa_msg(wpa_s, MSG_DEBUG,
1728                         "Interworking: No matching credentials and EAP method found for "
1729                         MACSTR, MAC2STR(bss->bssid));
1730                 nai_realm_free(realm, count);
1731                 return -1;
1732         }
1733
1734         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1735                 MAC2STR(bss->bssid));
1736
1737         if (already_connected(wpa_s, cred, bss)) {
1738                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1739                         MAC2STR(bss->bssid));
1740                 nai_realm_free(realm, count);
1741                 return 0;
1742         }
1743
1744         remove_duplicate_network(wpa_s, cred, bss);
1745
1746         ssid = wpa_config_add_network(wpa_s->conf);
1747         if (ssid == NULL) {
1748                 nai_realm_free(realm, count);
1749                 return -1;
1750         }
1751         ssid->parent_cred = cred;
1752         wpas_notify_network_added(wpa_s, ssid);
1753         wpa_config_set_network_defaults(ssid);
1754         ssid->priority = cred->priority;
1755         ssid->temporary = 1;
1756         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1757         if (ssid->ssid == NULL)
1758                 goto fail;
1759         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1760         ssid->ssid_len = bss->ssid_len;
1761
1762         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1763                 goto fail;
1764
1765         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1766                                                      eap->method), 0) < 0)
1767                 goto fail;
1768
1769         switch (eap->method) {
1770         case EAP_TYPE_TTLS:
1771                 if (eap->inner_method) {
1772                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1773                                     eap_get_name(EAP_VENDOR_IETF,
1774                                                  eap->inner_method));
1775                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1776                                 goto fail;
1777                         break;
1778                 }
1779                 switch (eap->inner_non_eap) {
1780                 case NAI_REALM_INNER_NON_EAP_PAP:
1781                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1782                             0)
1783                                 goto fail;
1784                         break;
1785                 case NAI_REALM_INNER_NON_EAP_CHAP:
1786                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1787                             < 0)
1788                                 goto fail;
1789                         break;
1790                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1791                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1792                                            0) < 0)
1793                                 goto fail;
1794                         break;
1795                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1796                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1797                                            0) < 0)
1798                                 goto fail;
1799                         break;
1800                 default:
1801                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1802                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1803                                            0) < 0)
1804                                 goto fail;
1805                         break;
1806                 }
1807                 break;
1808         case EAP_TYPE_PEAP:
1809         case EAP_TYPE_FAST:
1810                 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1811                                    0) < 0)
1812                         goto fail;
1813                 if (wpa_config_set(ssid, "pac_file",
1814                                    "\"blob://pac_interworking\"", 0) < 0)
1815                         goto fail;
1816                 name = eap_get_name(EAP_VENDOR_IETF,
1817                                     eap->inner_method ? eap->inner_method :
1818                                     EAP_TYPE_MSCHAPV2);
1819                 if (name == NULL)
1820                         goto fail;
1821                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1822                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1823                         goto fail;
1824                 break;
1825         case EAP_TYPE_TLS:
1826                 break;
1827         }
1828
1829         if (interworking_set_eap_params(ssid, cred,
1830                                         eap->method == EAP_TYPE_TTLS) < 0)
1831                 goto fail;
1832
1833         nai_realm_free(realm, count);
1834
1835         wpa_s->next_ssid = ssid;
1836         wpa_config_update_prio_list(wpa_s->conf);
1837         if (!only_add)
1838                 interworking_reconnect(wpa_s);
1839
1840         return ssid->id;
1841
1842 fail:
1843         wpas_notify_network_removed(wpa_s, ssid);
1844         wpa_config_remove_network(wpa_s->conf, ssid->id);
1845         nai_realm_free(realm, count);
1846         return -1;
1847 }
1848
1849
1850 #ifdef PCSC_FUNCS
1851 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1852 {
1853         size_t len;
1854
1855         if (wpa_s->imsi[0] && wpa_s->mnc_len)
1856                 return 0;
1857
1858         len = sizeof(wpa_s->imsi) - 1;
1859         if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1860                 scard_deinit(wpa_s->scard);
1861                 wpa_s->scard = NULL;
1862                 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1863                 return -1;
1864         }
1865         wpa_s->imsi[len] = '\0';
1866         wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1867         wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1868                    wpa_s->imsi, wpa_s->mnc_len);
1869
1870         return 0;
1871 }
1872 #endif /* PCSC_FUNCS */
1873
1874
1875 static struct wpa_cred * interworking_credentials_available_3gpp(
1876         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1877         int *excluded)
1878 {
1879         struct wpa_cred *selected = NULL;
1880 #ifdef INTERWORKING_3GPP
1881         struct wpa_cred *cred;
1882         int ret;
1883         int is_excluded = 0;
1884
1885         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1886                 wpa_msg(wpa_s, MSG_DEBUG,
1887                         "interworking-avail-3gpp: not avail, anqp: %p  anqp_3gpp: %p",
1888                         bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1889                 return NULL;
1890         }
1891
1892 #ifdef CONFIG_EAP_PROXY
1893         if (!wpa_s->imsi[0]) {
1894                 size_t len;
1895                 wpa_msg(wpa_s, MSG_DEBUG,
1896                         "Interworking: IMSI not available - try to read again through eap_proxy");
1897                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1898                                                              wpa_s->imsi,
1899                                                              &len);
1900                 if (wpa_s->mnc_len > 0) {
1901                         wpa_s->imsi[len] = '\0';
1902                         wpa_msg(wpa_s, MSG_DEBUG,
1903                                 "eap_proxy: IMSI %s (MNC length %d)",
1904                                 wpa_s->imsi, wpa_s->mnc_len);
1905                 } else {
1906                         wpa_msg(wpa_s, MSG_DEBUG,
1907                                 "eap_proxy: IMSI not available");
1908                 }
1909         }
1910 #endif /* CONFIG_EAP_PROXY */
1911
1912         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1913                 char *sep;
1914                 const char *imsi;
1915                 int mnc_len;
1916                 char imsi_buf[16];
1917                 size_t msin_len;
1918
1919 #ifdef PCSC_FUNCS
1920                 if (cred->pcsc && wpa_s->scard) {
1921                         if (interworking_pcsc_read_imsi(wpa_s) < 0)
1922                                 continue;
1923                         imsi = wpa_s->imsi;
1924                         mnc_len = wpa_s->mnc_len;
1925                         goto compare;
1926                 }
1927 #endif /* PCSC_FUNCS */
1928 #ifdef CONFIG_EAP_PROXY
1929                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1930                         imsi = wpa_s->imsi;
1931                         mnc_len = wpa_s->mnc_len;
1932                         goto compare;
1933                 }
1934 #endif /* CONFIG_EAP_PROXY */
1935
1936                 if (cred->imsi == NULL || !cred->imsi[0] ||
1937                     (!wpa_s->conf->external_sim &&
1938                      (cred->milenage == NULL || !cred->milenage[0])))
1939                         continue;
1940
1941                 sep = os_strchr(cred->imsi, '-');
1942                 if (sep == NULL ||
1943                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1944                         continue;
1945                 mnc_len = sep - cred->imsi - 3;
1946                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1947                 sep++;
1948                 msin_len = os_strlen(cred->imsi);
1949                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1950                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1951                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1952                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1953                 imsi = imsi_buf;
1954
1955 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1956         compare:
1957 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1958                 wpa_msg(wpa_s, MSG_DEBUG,
1959                         "Interworking: Parsing 3GPP info from " MACSTR,
1960                         MAC2STR(bss->bssid));
1961                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1962                 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
1963                         ret ? "" : "not ");
1964                 if (ret) {
1965                         if (cred_no_required_oi_match(cred, bss))
1966                                 continue;
1967                         if (!ignore_bw &&
1968                             cred_below_min_backhaul(wpa_s, cred, bss))
1969                                 continue;
1970                         if (!ignore_bw &&
1971                             cred_over_max_bss_load(wpa_s, cred, bss))
1972                                 continue;
1973                         if (!ignore_bw &&
1974                             cred_conn_capab_missing(wpa_s, cred, bss))
1975                                 continue;
1976                         if (cred_excluded_ssid(cred, bss)) {
1977                                 if (excluded == NULL)
1978                                         continue;
1979                                 if (selected == NULL) {
1980                                         selected = cred;
1981                                         is_excluded = 1;
1982                                 }
1983                         } else {
1984                                 if (selected == NULL || is_excluded ||
1985                                     cred_prio_cmp(selected, cred) < 0) {
1986                                         selected = cred;
1987                                         is_excluded = 0;
1988                                 }
1989                         }
1990                 }
1991         }
1992
1993         if (excluded)
1994                 *excluded = is_excluded;
1995 #endif /* INTERWORKING_3GPP */
1996         return selected;
1997 }
1998
1999
2000 static struct wpa_cred * interworking_credentials_available_realm(
2001         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2002         int *excluded)
2003 {
2004         struct wpa_cred *cred, *selected = NULL;
2005         struct nai_realm *realm;
2006         u16 count, i;
2007         int is_excluded = 0;
2008
2009         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2010                 return NULL;
2011
2012         if (wpa_s->conf->cred == NULL)
2013                 return NULL;
2014
2015         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2016                 MACSTR, MAC2STR(bss->bssid));
2017         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2018         if (realm == NULL) {
2019                 wpa_msg(wpa_s, MSG_DEBUG,
2020                         "Interworking: Could not parse NAI Realm list from "
2021                         MACSTR, MAC2STR(bss->bssid));
2022                 return NULL;
2023         }
2024
2025         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2026                 if (cred->realm == NULL)
2027                         continue;
2028
2029                 for (i = 0; i < count; i++) {
2030                         if (!nai_realm_match(&realm[i], cred->realm))
2031                                 continue;
2032                         if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2033                                 if (cred_no_required_oi_match(cred, bss))
2034                                         continue;
2035                                 if (!ignore_bw &&
2036                                     cred_below_min_backhaul(wpa_s, cred, bss))
2037                                         continue;
2038                                 if (!ignore_bw &&
2039                                     cred_over_max_bss_load(wpa_s, cred, bss))
2040                                         continue;
2041                                 if (!ignore_bw &&
2042                                     cred_conn_capab_missing(wpa_s, cred, bss))
2043                                         continue;
2044                                 if (cred_excluded_ssid(cred, bss)) {
2045                                         if (excluded == NULL)
2046                                                 continue;
2047                                         if (selected == NULL) {
2048                                                 selected = cred;
2049                                                 is_excluded = 1;
2050                                         }
2051                                 } else {
2052                                         if (selected == NULL || is_excluded ||
2053                                             cred_prio_cmp(selected, cred) < 0)
2054                                         {
2055                                                 selected = cred;
2056                                                 is_excluded = 0;
2057                                         }
2058                                 }
2059                                 break;
2060                         } else {
2061                                 wpa_msg(wpa_s, MSG_DEBUG,
2062                                         "Interworking: realm-find-eap returned false");
2063                         }
2064                 }
2065         }
2066
2067         nai_realm_free(realm, count);
2068
2069         if (excluded)
2070                 *excluded = is_excluded;
2071
2072         return selected;
2073 }
2074
2075
2076 static struct wpa_cred * interworking_credentials_available_helper(
2077         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2078         int *excluded)
2079 {
2080         struct wpa_cred *cred, *cred2;
2081         int excluded1, excluded2 = 0;
2082
2083         if (disallowed_bssid(wpa_s, bss->bssid) ||
2084             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2085                 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2086                            MACSTR, MAC2STR(bss->bssid));
2087                 return NULL;
2088         }
2089
2090         cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2091                                                         &excluded1);
2092         cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2093                                                         &excluded2);
2094         if (cred && cred2 &&
2095             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2096                 cred = cred2;
2097                 excluded1 = excluded2;
2098         }
2099         if (!cred) {
2100                 cred = cred2;
2101                 excluded1 = excluded2;
2102         }
2103
2104         cred2 = interworking_credentials_available_roaming_consortium(
2105                 wpa_s, bss, ignore_bw, &excluded2);
2106         if (cred && cred2 &&
2107             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2108                 cred = cred2;
2109                 excluded1 = excluded2;
2110         }
2111         if (!cred) {
2112                 cred = cred2;
2113                 excluded1 = excluded2;
2114         }
2115
2116         if (excluded)
2117                 *excluded = excluded1;
2118         return cred;
2119 }
2120
2121
2122 static struct wpa_cred * interworking_credentials_available(
2123         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2124 {
2125         struct wpa_cred *cred;
2126
2127         if (excluded)
2128                 *excluded = 0;
2129         cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2130                                                          excluded);
2131         if (cred)
2132                 return cred;
2133         return interworking_credentials_available_helper(wpa_s, bss, 1,
2134                                                          excluded);
2135 }
2136
2137
2138 int domain_name_list_contains(struct wpabuf *domain_names,
2139                               const char *domain, int exact_match)
2140 {
2141         const u8 *pos, *end;
2142         size_t len;
2143
2144         len = os_strlen(domain);
2145         pos = wpabuf_head(domain_names);
2146         end = pos + wpabuf_len(domain_names);
2147
2148         while (end - pos > 1) {
2149                 u8 elen;
2150
2151                 elen = *pos++;
2152                 if (elen > end - pos)
2153                         break;
2154
2155                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2156                                   pos, elen);
2157                 if (elen == len &&
2158                     os_strncasecmp(domain, (const char *) pos, len) == 0)
2159                         return 1;
2160                 if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2161                         const char *ap = (const char *) pos;
2162                         int offset = elen - len;
2163
2164                         if (os_strncasecmp(domain, ap + offset, len) == 0)
2165                                 return 1;
2166                 }
2167
2168                 pos += elen;
2169         }
2170
2171         return 0;
2172 }
2173
2174
2175 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2176                               struct wpa_cred *cred,
2177                               struct wpabuf *domain_names)
2178 {
2179         size_t i;
2180         int ret = -1;
2181 #ifdef INTERWORKING_3GPP
2182         char nai[100], *realm;
2183
2184         char *imsi = NULL;
2185         int mnc_len = 0;
2186         if (cred->imsi)
2187                 imsi = cred->imsi;
2188 #ifdef PCSC_FUNCS
2189         else if (cred->pcsc && wpa_s->scard) {
2190                 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2191                         return -1;
2192                 imsi = wpa_s->imsi;
2193                 mnc_len = wpa_s->mnc_len;
2194         }
2195 #endif /* PCSC_FUNCS */
2196 #ifdef CONFIG_EAP_PROXY
2197         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2198                 imsi = wpa_s->imsi;
2199                 mnc_len = wpa_s->mnc_len;
2200         }
2201 #endif /* CONFIG_EAP_PROXY */
2202         if (domain_names &&
2203             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2204                 realm = os_strchr(nai, '@');
2205                 if (realm)
2206                         realm++;
2207                 wpa_msg(wpa_s, MSG_DEBUG,
2208                         "Interworking: Search for match with SIM/USIM domain %s",
2209                         realm);
2210                 if (realm &&
2211                     domain_name_list_contains(domain_names, realm, 1))
2212                         return 1;
2213                 if (realm)
2214                         ret = 0;
2215         }
2216 #endif /* INTERWORKING_3GPP */
2217
2218         if (domain_names == NULL || cred->domain == NULL)
2219                 return ret;
2220
2221         for (i = 0; i < cred->num_domain; i++) {
2222                 wpa_msg(wpa_s, MSG_DEBUG,
2223                         "Interworking: Search for match with home SP FQDN %s",
2224                         cred->domain[i]);
2225                 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2226                         return 1;
2227         }
2228
2229         return 0;
2230 }
2231
2232
2233 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2234                                 struct wpabuf *domain_names)
2235 {
2236         struct wpa_cred *cred;
2237
2238         if (domain_names == NULL || wpa_s->conf->cred == NULL)
2239                 return -1;
2240
2241         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2242                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2243                 if (res)
2244                         return res;
2245         }
2246
2247         return 0;
2248 }
2249
2250
2251 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2252 {
2253         struct wpa_bss *bss;
2254         struct wpa_ssid *ssid;
2255
2256         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2257                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2258                         if (wpas_network_disabled(wpa_s, ssid) ||
2259                             ssid->mode != WPAS_MODE_INFRA)
2260                                 continue;
2261                         if (ssid->ssid_len != bss->ssid_len ||
2262                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2263                             0)
2264                                 continue;
2265                         /*
2266                          * TODO: Consider more accurate matching of security
2267                          * configuration similarly to what is done in events.c
2268                          */
2269                         return 1;
2270                 }
2271         }
2272
2273         return 0;
2274 }
2275
2276
2277 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2278                                  struct roaming_partner *partner,
2279                                  struct wpabuf *domain_names)
2280 {
2281         wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2282                    partner->fqdn, partner->exact_match, partner->priority,
2283                    partner->country);
2284         wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2285                           wpabuf_head(domain_names),
2286                           wpabuf_len(domain_names));
2287         if (!domain_name_list_contains(domain_names, partner->fqdn,
2288                                        partner->exact_match))
2289                 return 0;
2290         /* TODO: match Country */
2291         return 1;
2292 }
2293
2294
2295 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2296                        struct wpa_bss *bss)
2297 {
2298         size_t i;
2299
2300         if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2301                 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2302                 return 128; /* cannot check preference with domain name */
2303         }
2304
2305         if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2306         {
2307                 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2308                 return 0; /* max preference for home SP network */
2309         }
2310
2311         for (i = 0; i < cred->num_roaming_partner; i++) {
2312                 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2313                                           bss->anqp->domain_name)) {
2314                         wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2315                                    cred->roaming_partner[i].priority);
2316                         return cred->roaming_partner[i].priority;
2317                 }
2318         }
2319
2320         wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2321         return 128;
2322 }
2323
2324
2325 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2326                                                   struct wpa_bss *selected,
2327                                                   struct wpa_cred *cred)
2328 {
2329         struct wpa_bss *bss;
2330         u8 best_prio, prio;
2331         struct wpa_cred *cred2;
2332
2333         /*
2334          * Check if any other BSS is operated by a more preferred roaming
2335          * partner.
2336          */
2337
2338         best_prio = roaming_prio(wpa_s, cred, selected);
2339         wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2340                    MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2341                    cred->id);
2342
2343         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2344                 if (bss == selected)
2345                         continue;
2346                 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2347                 if (!cred2)
2348                         continue;
2349                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2350                         continue;
2351                 prio = roaming_prio(wpa_s, cred2, bss);
2352                 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2353                            MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2354                            cred2->id);
2355                 if (prio < best_prio) {
2356                         int bh1, bh2, load1, load2, conn1, conn2;
2357                         bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2358                         load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2359                         conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2360                         bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2361                         load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2362                         conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2363                         wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d  new: %d %d %d",
2364                                    bh1, load1, conn1, bh2, load2, conn2);
2365                         if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2366                                 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2367                                 best_prio = prio;
2368                                 selected = bss;
2369                         }
2370                 }
2371         }
2372
2373         return selected;
2374 }
2375
2376
2377 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2378 {
2379         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2380         struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2381         unsigned int count = 0;
2382         const char *type;
2383         int res;
2384         struct wpa_cred *cred, *selected_cred = NULL;
2385         struct wpa_cred *selected_home_cred = NULL;
2386         struct wpa_cred *selected2_cred = NULL;
2387         struct wpa_cred *selected2_home_cred = NULL;
2388
2389         wpa_s->network_select = 0;
2390
2391         wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2392                    wpa_s->auto_select);
2393         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2394                 int excluded = 0;
2395                 int bh, bss_load, conn_capab;
2396                 cred = interworking_credentials_available(wpa_s, bss,
2397                                                           &excluded);
2398                 if (!cred)
2399                         continue;
2400
2401                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2402                         /*
2403                          * We currently support only HS 2.0 networks and those
2404                          * are required to use WPA2-Enterprise.
2405                          */
2406                         wpa_msg(wpa_s, MSG_DEBUG,
2407                                 "Interworking: Credential match with " MACSTR
2408                                 " but network does not use RSN",
2409                                 MAC2STR(bss->bssid));
2410                         continue;
2411                 }
2412                 if (!excluded)
2413                         count++;
2414                 res = interworking_home_sp(wpa_s, bss->anqp ?
2415                                            bss->anqp->domain_name : NULL);
2416                 if (res > 0)
2417                         type = "home";
2418                 else if (res == 0)
2419                         type = "roaming";
2420                 else
2421                         type = "unknown";
2422                 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2423                 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2424                 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2425                 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2426                         excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2427                         MAC2STR(bss->bssid), type,
2428                         bh ? " below_min_backhaul=1" : "",
2429                         bss_load ? " over_max_bss_load=1" : "",
2430                         conn_capab ? " conn_capab_missing=1" : "",
2431                         cred->id, cred->priority, cred->sp_priority);
2432                 if (excluded)
2433                         continue;
2434                 if (wpa_s->auto_select ||
2435                     (wpa_s->conf->auto_interworking &&
2436                      wpa_s->auto_network_select)) {
2437                         if (bh || bss_load || conn_capab) {
2438                                 if (selected2_cred == NULL ||
2439                                     cred_prio_cmp(cred, selected2_cred) > 0) {
2440                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2441                                         selected2 = bss;
2442                                         selected2_cred = cred;
2443                                 }
2444                                 if (res > 0 &&
2445                                     (selected2_home_cred == NULL ||
2446                                      cred_prio_cmp(cred, selected2_home_cred) >
2447                                      0)) {
2448                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2449                                         selected2_home = bss;
2450                                         selected2_home_cred = cred;
2451                                 }
2452                         } else {
2453                                 if (selected_cred == NULL ||
2454                                     cred_prio_cmp(cred, selected_cred) > 0) {
2455                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2456                                         selected = bss;
2457                                         selected_cred = cred;
2458                                 }
2459                                 if (res > 0 &&
2460                                     (selected_home_cred == NULL ||
2461                                      cred_prio_cmp(cred, selected_home_cred) >
2462                                      0)) {
2463                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2464                                         selected_home = bss;
2465                                         selected_home_cred = cred;
2466                                 }
2467                         }
2468                 }
2469         }
2470
2471         if (selected_home && selected_home != selected &&
2472             selected_home_cred &&
2473             (selected_cred == NULL ||
2474              cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2475                 /* Prefer network operated by the Home SP */
2476                 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2477                 selected = selected_home;
2478                 selected_cred = selected_home_cred;
2479         }
2480
2481         if (!selected) {
2482                 if (selected2_home) {
2483                         wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2484                         selected = selected2_home;
2485                         selected_cred = selected2_home_cred;
2486                 } else if (selected2) {
2487                         wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2488                         selected = selected2;
2489                         selected_cred = selected2_cred;
2490                 }
2491         }
2492
2493         if (count == 0) {
2494                 /*
2495                  * No matching network was found based on configured
2496                  * credentials. Check whether any of the enabled network blocks
2497                  * have matching APs.
2498                  */
2499                 if (interworking_find_network_match(wpa_s)) {
2500                         wpa_msg(wpa_s, MSG_DEBUG,
2501                                 "Interworking: Possible BSS match for enabled network configurations");
2502                         if (wpa_s->auto_select) {
2503                                 interworking_reconnect(wpa_s);
2504                                 return;
2505                         }
2506                 }
2507
2508                 if (wpa_s->auto_network_select) {
2509                         wpa_msg(wpa_s, MSG_DEBUG,
2510                                 "Interworking: Continue scanning after ANQP fetch");
2511                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2512                                                 0);
2513                         return;
2514                 }
2515
2516                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2517                         "with matching credentials found");
2518                 if (wpa_s->wpa_state == WPA_SCANNING)
2519                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2520         }
2521
2522         if (selected) {
2523                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2524                            MAC2STR(selected->bssid));
2525                 selected = pick_best_roaming_partner(wpa_s, selected,
2526                                                      selected_cred);
2527                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2528                            " (after best roaming partner selection)",
2529                            MAC2STR(selected->bssid));
2530                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2531                         MAC2STR(selected->bssid));
2532                 interworking_connect(wpa_s, selected, 0);
2533         }
2534 }
2535
2536
2537 static struct wpa_bss_anqp *
2538 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2539 {
2540         struct wpa_bss *other;
2541
2542         if (is_zero_ether_addr(bss->hessid))
2543                 return NULL; /* Cannot be in the same homegenous ESS */
2544
2545         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2546                 if (other == bss)
2547                         continue;
2548                 if (other->anqp == NULL)
2549                         continue;
2550                 if (other->anqp->roaming_consortium == NULL &&
2551                     other->anqp->nai_realm == NULL &&
2552                     other->anqp->anqp_3gpp == NULL &&
2553                     other->anqp->domain_name == NULL)
2554                         continue;
2555                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2556                         continue;
2557                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2558                         continue;
2559                 if (bss->ssid_len != other->ssid_len ||
2560                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2561                         continue;
2562
2563                 wpa_msg(wpa_s, MSG_DEBUG,
2564                         "Interworking: Share ANQP data with already fetched BSSID "
2565                         MACSTR " and " MACSTR,
2566                         MAC2STR(other->bssid), MAC2STR(bss->bssid));
2567                 other->anqp->users++;
2568                 return other->anqp;
2569         }
2570
2571         return NULL;
2572 }
2573
2574
2575 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2576 {
2577         struct wpa_bss *bss;
2578         int found = 0;
2579         const u8 *ie;
2580
2581         wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2582                    "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2583                    wpa_s->fetch_anqp_in_progress,
2584                    wpa_s->fetch_osu_icon_in_progress);
2585
2586         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2587                 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2588                 return;
2589         }
2590
2591 #ifdef CONFIG_HS20
2592         if (wpa_s->fetch_osu_icon_in_progress) {
2593                 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2594                 hs20_next_osu_icon(wpa_s);
2595                 return;
2596         }
2597 #endif /* CONFIG_HS20 */
2598
2599         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2600                 if (!(bss->caps & IEEE80211_CAP_ESS))
2601                         continue;
2602                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2603                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2604                         continue; /* AP does not support Interworking */
2605                 if (disallowed_bssid(wpa_s, bss->bssid) ||
2606                     disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2607                         continue; /* Disallowed BSS */
2608
2609                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2610                         if (bss->anqp == NULL) {
2611                                 bss->anqp = interworking_match_anqp_info(wpa_s,
2612                                                                          bss);
2613                                 if (bss->anqp) {
2614                                         /* Shared data already fetched */
2615                                         continue;
2616                                 }
2617                                 bss->anqp = wpa_bss_anqp_alloc();
2618                                 if (bss->anqp == NULL)
2619                                         break;
2620                         }
2621                         found++;
2622                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2623                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2624                                 MACSTR, MAC2STR(bss->bssid));
2625                         interworking_anqp_send_req(wpa_s, bss);
2626                         break;
2627                 }
2628         }
2629
2630         if (found == 0) {
2631 #ifdef CONFIG_HS20
2632                 if (wpa_s->fetch_osu_info) {
2633                         if (wpa_s->num_prov_found == 0 &&
2634                             wpa_s->fetch_osu_waiting_scan &&
2635                             wpa_s->num_osu_scans < 3) {
2636                                 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2637                                 hs20_start_osu_scan(wpa_s);
2638                                 return;
2639                         }
2640                         wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2641                         hs20_osu_icon_fetch(wpa_s);
2642                         return;
2643                 }
2644 #endif /* CONFIG_HS20 */
2645                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2646                 wpa_s->fetch_anqp_in_progress = 0;
2647                 if (wpa_s->network_select)
2648                         interworking_select_network(wpa_s);
2649         }
2650 }
2651
2652
2653 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2654 {
2655         struct wpa_bss *bss;
2656
2657         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2658                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2659
2660         wpa_s->fetch_anqp_in_progress = 1;
2661
2662         /*
2663          * Start actual ANQP operation from eloop call to make sure the loop
2664          * does not end up using excessive recursion.
2665          */
2666         eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2667 }
2668
2669
2670 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2671 {
2672         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2673                 return 0;
2674
2675         wpa_s->network_select = 0;
2676         wpa_s->fetch_all_anqp = 1;
2677         wpa_s->fetch_osu_info = 0;
2678
2679         interworking_start_fetch_anqp(wpa_s);
2680
2681         return 0;
2682 }
2683
2684
2685 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2686 {
2687         if (!wpa_s->fetch_anqp_in_progress)
2688                 return;
2689
2690         wpa_s->fetch_anqp_in_progress = 0;
2691 }
2692
2693
2694 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2695                   u16 info_ids[], size_t num_ids, u32 subtypes)
2696 {
2697         struct wpabuf *buf;
2698         struct wpabuf *hs20_buf = NULL;
2699         int ret = 0;
2700         int freq;
2701         struct wpa_bss *bss;
2702         int res;
2703
2704         bss = wpa_bss_get_bssid(wpa_s, dst);
2705         if (!bss) {
2706                 wpa_printf(MSG_WARNING,
2707                            "ANQP: Cannot send query to unknown BSS "
2708                            MACSTR, MAC2STR(dst));
2709                 return -1;
2710         }
2711
2712         wpa_bss_anqp_unshare_alloc(bss);
2713         freq = bss->freq;
2714
2715         wpa_msg(wpa_s, MSG_DEBUG,
2716                 "ANQP: Query Request to " MACSTR " for %u id(s)",
2717                 MAC2STR(dst), (unsigned int) num_ids);
2718
2719 #ifdef CONFIG_HS20
2720         if (subtypes != 0) {
2721                 hs20_buf = wpabuf_alloc(100);
2722                 if (hs20_buf == NULL)
2723                         return -1;
2724                 hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf);
2725         }
2726 #endif /* CONFIG_HS20 */
2727
2728         buf = anqp_build_req(info_ids, num_ids, hs20_buf);
2729         wpabuf_free(hs20_buf);
2730         if (buf == NULL)
2731                 return -1;
2732
2733         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2734         if (res < 0) {
2735                 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2736                 wpabuf_free(buf);
2737                 ret = -1;
2738         } else {
2739                 wpa_msg(wpa_s, MSG_DEBUG,
2740                         "ANQP: Query started with dialog token %u", res);
2741         }
2742
2743         return ret;
2744 }
2745
2746
2747 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2748                            struct wpa_bss_anqp *anqp, u16 info_id,
2749                            const u8 *data, size_t slen)
2750 {
2751         struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2752
2753         if (!anqp)
2754                 return;
2755
2756         dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2757                          list) {
2758                 if (tmp->infoid == info_id) {
2759                         elem = tmp;
2760                         break;
2761                 }
2762         }
2763
2764         if (!elem) {
2765                 elem = os_zalloc(sizeof(*elem));
2766                 if (!elem)
2767                         return;
2768                 elem->infoid = info_id;
2769                 dl_list_add(&anqp->anqp_elems, &elem->list);
2770         } else {
2771                 wpabuf_free(elem->payload);
2772         }
2773
2774         elem->payload = wpabuf_alloc_copy(data, slen);
2775         if (!elem->payload) {
2776                 dl_list_del(&elem->list);
2777                 os_free(elem);
2778         }
2779 }
2780
2781
2782 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2783                                             struct wpa_bss *bss, const u8 *sa,
2784                                             u16 info_id,
2785                                             const u8 *data, size_t slen,
2786                                             u8 dialog_token)
2787 {
2788         const u8 *pos = data;
2789         struct wpa_bss_anqp *anqp = NULL;
2790 #ifdef CONFIG_HS20
2791         u8 type;
2792 #endif /* CONFIG_HS20 */
2793
2794         if (bss)
2795                 anqp = bss->anqp;
2796
2797         switch (info_id) {
2798         case ANQP_CAPABILITY_LIST:
2799                 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2800                         " ANQP Capability list", MAC2STR(sa));
2801                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2802                                   pos, slen);
2803                 if (anqp) {
2804                         wpabuf_free(anqp->capability_list);
2805                         anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2806                 }
2807                 break;
2808         case ANQP_VENUE_NAME:
2809                 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2810                         " Venue Name", MAC2STR(sa));
2811                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2812                 if (anqp) {
2813                         wpabuf_free(anqp->venue_name);
2814                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2815                 }
2816                 break;
2817         case ANQP_NETWORK_AUTH_TYPE:
2818                 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2819                         " Network Authentication Type information",
2820                         MAC2STR(sa));
2821                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2822                                   "Type", pos, slen);
2823                 if (anqp) {
2824                         wpabuf_free(anqp->network_auth_type);
2825                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2826                 }
2827                 break;
2828         case ANQP_ROAMING_CONSORTIUM:
2829                 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2830                         " Roaming Consortium list", MAC2STR(sa));
2831                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2832                                   pos, slen);
2833                 if (anqp) {
2834                         wpabuf_free(anqp->roaming_consortium);
2835                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2836                 }
2837                 break;
2838         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2839                 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2840                         " IP Address Type Availability information",
2841                         MAC2STR(sa));
2842                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2843                             pos, slen);
2844                 if (anqp) {
2845                         wpabuf_free(anqp->ip_addr_type_availability);
2846                         anqp->ip_addr_type_availability =
2847                                 wpabuf_alloc_copy(pos, slen);
2848                 }
2849                 break;
2850         case ANQP_NAI_REALM:
2851                 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2852                         " NAI Realm list", MAC2STR(sa));
2853                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2854                 if (anqp) {
2855                         wpabuf_free(anqp->nai_realm);
2856                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2857                 }
2858                 break;
2859         case ANQP_3GPP_CELLULAR_NETWORK:
2860                 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2861                         " 3GPP Cellular Network information", MAC2STR(sa));
2862                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2863                                   pos, slen);
2864                 if (anqp) {
2865                         wpabuf_free(anqp->anqp_3gpp);
2866                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2867                 }
2868                 break;
2869         case ANQP_DOMAIN_NAME:
2870                 wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR
2871                         " Domain Name list", MAC2STR(sa));
2872                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2873                 if (anqp) {
2874                         wpabuf_free(anqp->domain_name);
2875                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2876                 }
2877                 break;
2878         case ANQP_VENDOR_SPECIFIC:
2879                 if (slen < 3)
2880                         return;
2881
2882                 switch (WPA_GET_BE24(pos)) {
2883 #ifdef CONFIG_HS20
2884                 case OUI_WFA:
2885                         pos += 3;
2886                         slen -= 3;
2887
2888                         if (slen < 1)
2889                                 return;
2890                         type = *pos++;
2891                         slen--;
2892
2893                         switch (type) {
2894                         case HS20_ANQP_OUI_TYPE:
2895                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2896                                                              pos, slen,
2897                                                              dialog_token);
2898                                 break;
2899                         default:
2900                                 wpa_msg(wpa_s, MSG_DEBUG,
2901                                         "HS20: Unsupported ANQP vendor type %u",
2902                                         type);
2903                                 break;
2904                         }
2905                         break;
2906 #endif /* CONFIG_HS20 */
2907                 default:
2908                         wpa_msg(wpa_s, MSG_DEBUG,
2909                                 "Interworking: Unsupported vendor-specific ANQP OUI %06x",
2910                                 WPA_GET_BE24(pos));
2911                         return;
2912                 }
2913                 break;
2914         default:
2915                 wpa_msg(wpa_s, MSG_DEBUG,
2916                         "Interworking: Unsupported ANQP Info ID %u", info_id);
2917                 anqp_add_extra(wpa_s, anqp, info_id, data, slen);
2918                 break;
2919         }
2920 }
2921
2922
2923 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2924                   enum gas_query_result result,
2925                   const struct wpabuf *adv_proto,
2926                   const struct wpabuf *resp, u16 status_code)
2927 {
2928         struct wpa_supplicant *wpa_s = ctx;
2929         const u8 *pos;
2930         const u8 *end;
2931         u16 info_id;
2932         u16 slen;
2933         struct wpa_bss *bss = NULL, *tmp;
2934         const char *anqp_result = "SUCCESS";
2935
2936         wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2937                    " dialog_token=%u result=%d status_code=%u",
2938                    MAC2STR(dst), dialog_token, result, status_code);
2939         if (result != GAS_QUERY_SUCCESS) {
2940 #ifdef CONFIG_HS20
2941                 if (wpa_s->fetch_osu_icon_in_progress)
2942                         hs20_icon_fetch_failed(wpa_s);
2943 #endif /* CONFIG_HS20 */
2944                 anqp_result = "FAILURE";
2945                 goto out;
2946         }
2947
2948         pos = wpabuf_head(adv_proto);
2949         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2950             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2951                 wpa_msg(wpa_s, MSG_DEBUG,
2952                         "ANQP: Unexpected Advertisement Protocol in response");
2953 #ifdef CONFIG_HS20
2954                 if (wpa_s->fetch_osu_icon_in_progress)
2955                         hs20_icon_fetch_failed(wpa_s);
2956 #endif /* CONFIG_HS20 */
2957                 anqp_result = "INVALID_FRAME";
2958                 goto out;
2959         }
2960
2961         /*
2962          * If possible, select the BSS entry based on which BSS entry was used
2963          * for the request. This can help in cases where multiple BSS entries
2964          * may exist for the same AP.
2965          */
2966         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2967                 if (tmp == wpa_s->interworking_gas_bss &&
2968                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2969                         bss = tmp;
2970                         break;
2971                 }
2972         }
2973         if (bss == NULL)
2974                 bss = wpa_bss_get_bssid(wpa_s, dst);
2975
2976         pos = wpabuf_head(resp);
2977         end = pos + wpabuf_len(resp);
2978
2979         while (pos < end) {
2980                 unsigned int left = end - pos;
2981
2982                 if (left < 4) {
2983                         wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
2984                         anqp_result = "INVALID_FRAME";
2985                         goto out_parse_done;
2986                 }
2987                 info_id = WPA_GET_LE16(pos);
2988                 pos += 2;
2989                 slen = WPA_GET_LE16(pos);
2990                 pos += 2;
2991                 left -= 4;
2992                 if (left < slen) {
2993                         wpa_msg(wpa_s, MSG_DEBUG,
2994                                 "ANQP: Invalid element length for Info ID %u",
2995                                 info_id);
2996                         anqp_result = "INVALID_FRAME";
2997                         goto out_parse_done;
2998                 }
2999                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
3000                                                 slen, dialog_token);
3001                 pos += slen;
3002         }
3003
3004 out_parse_done:
3005 #ifdef CONFIG_HS20
3006         hs20_notify_parse_done(wpa_s);
3007 #endif /* CONFIG_HS20 */
3008 out:
3009         wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3010                 MAC2STR(dst), anqp_result);
3011 }
3012
3013
3014 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3015                                           struct wpa_scan_results *scan_res)
3016 {
3017         wpa_msg(wpa_s, MSG_DEBUG,
3018                 "Interworking: Scan results available - start ANQP fetch");
3019         interworking_start_fetch_anqp(wpa_s);
3020 }
3021
3022
3023 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3024                         int *freqs)
3025 {
3026         interworking_stop_fetch_anqp(wpa_s);
3027         wpa_s->network_select = 1;
3028         wpa_s->auto_network_select = 0;
3029         wpa_s->auto_select = !!auto_select;
3030         wpa_s->fetch_all_anqp = 0;
3031         wpa_s->fetch_osu_info = 0;
3032         wpa_msg(wpa_s, MSG_DEBUG,
3033                 "Interworking: Start scan for network selection");
3034         wpa_s->scan_res_handler = interworking_scan_res_handler;
3035         wpa_s->normal_scans = 0;
3036         wpa_s->scan_req = MANUAL_SCAN_REQ;
3037         os_free(wpa_s->manual_scan_freqs);
3038         wpa_s->manual_scan_freqs = freqs;
3039         wpa_s->after_wps = 0;
3040         wpa_s->known_wps_freq = 0;
3041         wpa_supplicant_req_scan(wpa_s, 0, 0);
3042
3043         return 0;
3044 }
3045
3046
3047 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3048                         enum gas_query_result result,
3049                         const struct wpabuf *adv_proto,
3050                         const struct wpabuf *resp, u16 status_code)
3051 {
3052         struct wpa_supplicant *wpa_s = ctx;
3053         struct wpabuf *n;
3054
3055         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3056                 " dialog_token=%d status_code=%d resp_len=%d",
3057                 MAC2STR(addr), dialog_token, status_code,
3058                 resp ? (int) wpabuf_len(resp) : -1);
3059         if (!resp)
3060                 return;
3061
3062         n = wpabuf_dup(resp);
3063         if (n == NULL)
3064                 return;
3065         wpabuf_free(wpa_s->prev_gas_resp);
3066         wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3067         os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3068         wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3069         wpa_s->last_gas_resp = n;
3070         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3071         wpa_s->last_gas_dialog_token = dialog_token;
3072 }
3073
3074
3075 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3076                      const struct wpabuf *adv_proto,
3077                      const struct wpabuf *query)
3078 {
3079         struct wpabuf *buf;
3080         int ret = 0;
3081         int freq;
3082         struct wpa_bss *bss;
3083         int res;
3084         size_t len;
3085         u8 query_resp_len_limit = 0;
3086
3087         freq = wpa_s->assoc_freq;
3088         bss = wpa_bss_get_bssid(wpa_s, dst);
3089         if (bss)
3090                 freq = bss->freq;
3091         if (freq <= 0)
3092                 return -1;
3093
3094         wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3095                 MAC2STR(dst), freq);
3096         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3097         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3098
3099         len = 3 + wpabuf_len(adv_proto) + 2;
3100         if (query)
3101                 len += wpabuf_len(query);
3102         buf = gas_build_initial_req(0, len);
3103         if (buf == NULL)
3104                 return -1;
3105
3106         /* Advertisement Protocol IE */
3107         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3108         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3109         wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3110         wpabuf_put_buf(buf, adv_proto);
3111
3112         /* GAS Query */
3113         if (query) {
3114                 wpabuf_put_le16(buf, wpabuf_len(query));
3115                 wpabuf_put_buf(buf, query);
3116         } else
3117                 wpabuf_put_le16(buf, 0);
3118
3119         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3120         if (res < 0) {
3121                 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3122                 wpabuf_free(buf);
3123                 ret = -1;
3124         } else
3125                 wpa_msg(wpa_s, MSG_DEBUG,
3126                         "GAS: Query started with dialog token %u", res);
3127
3128         return ret;
3129 }