wpa_supplicant/interworking.c

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