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