wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "common/ieee802_11_defs.h"
  13 #include "common/gas.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "utils/pcsc_funcs.h"
  16 #include "drivers/driver.h"
  17 #include "eap_common/eap_defs.h"
  18 #include "eap_peer/eap.h"
  19 #include "eap_peer/eap_methods.h"
  20 #include "wpa_supplicant_i.h"
  21 #include "config.h"
  22 #include "config_ssid.h"
  23 #include "bss.h"
  24 #include "scan.h"
  25 #include "notify.h"
  26 #include "gas_query.h"
  27 #include "hs20_supplicant.h"
  28 #include "interworking.h"
  29
  30
  31 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  32 #define INTERWORKING_3GPP
  33 #else
  34 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  35 #define INTERWORKING_3GPP
  36 #else
  37 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  38 #define INTERWORKING_3GPP
  39 #endif
  40 #endif
  41 #endif
  42
  43 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  44
  45
  46 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  47 {
  48         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  49                 wpa_supplicant_cancel_sched_scan(wpa_s);
  50                 wpa_supplicant_deauthenticate(wpa_s,
  51                                               WLAN_REASON_DEAUTH_LEAVING);
  52         }
  53         wpa_s->disconnected = 0;
  54         wpa_s->reassociate = 1;
  55
  56         if (wpa_s->last_scan_res_used > 0) {
  57                 struct os_time now;
  58                 os_get_time(&now);
  59                 if (now.sec - wpa_s->last_scan.sec <= 5) {
  60                         wpa_printf(MSG_DEBUG, "Interworking: Old scan results "
  61                                    "are fresh - connect without new scan");
  62                         if (wpas_select_network_from_last_scan(wpa_s) == 0)
  63                                 return;
  64                 }
  65         }
  66
  67         wpa_supplicant_req_scan(wpa_s, 0, 0);
  68 }
  69
  70
  71 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  72                                       struct wpabuf *extra)
  73 {
  74         struct wpabuf *buf;
  75         size_t i;
  76         u8 *len_pos;
  77
  78         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  79                                          (extra ? wpabuf_len(extra) : 0));
  80         if (buf == NULL)
  81                 return NULL;
  82
  83         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  84         for (i = 0; i < num_ids; i++)
  85                 wpabuf_put_le16(buf, info_ids[i]);
  86         gas_anqp_set_element_len(buf, len_pos);
  87         if (extra)
  88                 wpabuf_put_buf(buf, extra);
  89
  90         gas_anqp_set_len(buf);
  91
  92         return buf;
  93 }
  94
  95
  96 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  97                                       u8 dialog_token,
  98                                       enum gas_query_result result,
  99                                       const struct wpabuf *adv_proto,
 100                                       const struct wpabuf *resp,
 101                                       u16 status_code)
 102 {
 103         struct wpa_supplicant *wpa_s = ctx;
 104
 105         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 106                      status_code);
 107         interworking_next_anqp_fetch(wpa_s);
 108 }
 109
 110
 111 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 112 {
 113         struct wpa_cred *cred;
 114
 115         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 116                 if (cred->roaming_consortium_len)
 117                         return 1;
 118         }
 119         return 0;
 120 }
 121
 122
 123 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 124 {
 125         struct wpa_cred *cred;
 126
 127         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 128                 if (cred->pcsc || cred->imsi)
 129                         return 1;
 130         }
 131         return 0;
 132 }
 133
 134
 135 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 136 {
 137         struct wpa_cred *cred;
 138
 139         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 140                 if (cred->pcsc || cred->imsi)
 141                         continue;
 142                 if (!cred->eap_method)
 143                         return 1;
 144                 if (cred->realm && cred->roaming_consortium_len == 0)
 145                         return 1;
 146         }
 147         return 0;
 148 }
 149
 150
 151 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 152 {
 153         struct wpa_cred *cred;
 154
 155         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 156                 if (cred->domain || cred->pcsc || cred->imsi)
 157                         return 1;
 158         }
 159         return 0;
 160 }
 161
 162
 163 static int additional_roaming_consortiums(struct wpa_bss *bss)
 164 {
 165         const u8 *ie;
 166         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 167         if (ie == NULL || ie[1] == 0)
 168                 return 0;
 169         return ie[2]; /* Number of ANQP OIs */
 170 }
 171
 172
 173 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 174                                       struct wpa_bss *bss)
 175 {
 176         struct wpabuf *buf;
 177         int ret = 0;
 178         int res;
 179         u16 info_ids[8];
 180         size_t num_info_ids = 0;
 181         struct wpabuf *extra = NULL;
 182         int all = wpa_s->fetch_all_anqp;
 183
 184         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 185                    MAC2STR(bss->bssid));
 186
 187         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 188         if (all) {
 189                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 190                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 191         }
 192         if (all || (cred_with_roaming_consortium(wpa_s) &&
 193                     additional_roaming_consortiums(bss)))
 194                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 195         if (all)
 196                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 197         if (all || cred_with_nai_realm(wpa_s))
 198                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 199         if (all || cred_with_3gpp(wpa_s))
 200                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 201         if (all || cred_with_domain(wpa_s))
 202                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 203         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 204                     (u8 *) info_ids, num_info_ids * 2);
 205
 206 #ifdef CONFIG_HS20
 207         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 208                 u8 *len_pos;
 209
 210                 extra = wpabuf_alloc(100);
 211                 if (!extra)
 212                         return -1;
 213
 214                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 215                 wpabuf_put_be24(extra, OUI_WFA);
 216                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 217                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 218                 wpabuf_put_u8(extra, 0); /* Reserved */
 219                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 220                 if (all) {
 221                         wpabuf_put_u8(extra,
 222                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 223                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 224                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 225                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 226                 }
 227                 gas_anqp_set_element_len(extra, len_pos);
 228         }
 229 #endif /* CONFIG_HS20 */
 230
 231         buf = anqp_build_req(info_ids, num_info_ids, extra);
 232         wpabuf_free(extra);
 233         if (buf == NULL)
 234                 return -1;
 235
 236         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 237                             interworking_anqp_resp_cb, wpa_s);
 238         if (res < 0) {
 239                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 240                 ret = -1;
 241         } else
 242                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 243                            "%u", res);
 244
 245         wpabuf_free(buf);
 246         return ret;
 247 }
 248
 249
 250 struct nai_realm_eap {
 251         u8 method;
 252         u8 inner_method;
 253         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 254         u8 cred_type;
 255         u8 tunneled_cred_type;
 256 };
 257
 258 struct nai_realm {
 259         u8 encoding;
 260         char *realm;
 261         u8 eap_count;
 262         struct nai_realm_eap *eap;
 263 };
 264
 265
 266 static void nai_realm_free(struct nai_realm *realms, u16 count)
 267 {
 268         u16 i;
 269
 270         if (realms == NULL)
 271                 return;
 272         for (i = 0; i < count; i++) {
 273                 os_free(realms[i].eap);
 274                 os_free(realms[i].realm);
 275         }
 276         os_free(realms);
 277 }
 278
 279
 280 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 281                                       const u8 *end)
 282 {
 283         u8 elen, auth_count, a;
 284         const u8 *e_end;
 285
 286         if (pos + 3 > end) {
 287                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 288                 return NULL;
 289         }
 290
 291         elen = *pos++;
 292         if (pos + elen > end || elen < 2) {
 293                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 294                 return NULL;
 295         }
 296         e_end = pos + elen;
 297         e->method = *pos++;
 298         auth_count = *pos++;
 299         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 300                    elen, e->method, auth_count);
 301
 302         for (a = 0; a < auth_count; a++) {
 303                 u8 id, len;
 304
 305                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 306                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 307                                    "Parameter subfield");
 308                         return NULL;
 309                 }
 310
 311                 id = *pos++;
 312                 len = *pos++;
 313
 314                 switch (id) {
 315                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 316                         if (len < 1)
 317                                 break;
 318                         e->inner_non_eap = *pos;
 319                         if (e->method != EAP_TYPE_TTLS)
 320                                 break;
 321                         switch (*pos) {
 322                         case NAI_REALM_INNER_NON_EAP_PAP:
 323                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 324                                 break;
 325                         case NAI_REALM_INNER_NON_EAP_CHAP:
 326                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 327                                 break;
 328                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 329                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 330                                 break;
 331                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 332                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 333                                 break;
 334                         }
 335                         break;
 336                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 337                         if (len < 1)
 338                                 break;
 339                         e->inner_method = *pos;
 340                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 341                                    e->inner_method);
 342                         break;
 343                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 344                         if (len < 1)
 345                                 break;
 346                         e->cred_type = *pos;
 347                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 348                                    e->cred_type);
 349                         break;
 350                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 351                         if (len < 1)
 352                                 break;
 353                         e->tunneled_cred_type = *pos;
 354                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 355                                    "Type: %u", e->tunneled_cred_type);
 356                         break;
 357                 default:
 358                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 359                                    "Parameter: id=%u len=%u", id, len);
 360                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 361                                     "Value", pos, len);
 362                         break;
 363                 }
 364
 365                 pos += len;
 366         }
 367
 368         return e_end;
 369 }
 370
 371
 372 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 373                                         const u8 *end)
 374 {
 375         u16 len;
 376         const u8 *f_end;
 377         u8 realm_len, e;
 378
 379         if (end - pos < 4) {
 380                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 381                            "fixed fields");
 382                 return NULL;
 383         }
 384
 385         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 386         pos += 2;
 387         if (pos + len > end || len < 3) {
 388                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 389                            "(len=%u; left=%u)",
 390                            len, (unsigned int) (end - pos));
 391                 return NULL;
 392         }
 393         f_end = pos + len;
 394
 395         r->encoding = *pos++;
 396         realm_len = *pos++;
 397         if (pos + realm_len > f_end) {
 398                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 399                            "(len=%u; left=%u)",
 400                            realm_len, (unsigned int) (f_end - pos));
 401                 return NULL;
 402         }
 403         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 404         r->realm = os_malloc(realm_len + 1);
 405         if (r->realm == NULL)
 406                 return NULL;
 407         os_memcpy(r->realm, pos, realm_len);
 408         r->realm[realm_len] = '\0';
 409         pos += realm_len;
 410
 411         if (pos + 1 > f_end) {
 412                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 413                 return NULL;
 414         }
 415         r->eap_count = *pos++;
 416         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 417         if (pos + r->eap_count * 3 > f_end) {
 418                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 419                 return NULL;
 420         }
 421         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 422         if (r->eap == NULL)
 423                 return NULL;
 424
 425         for (e = 0; e < r->eap_count; e++) {
 426                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 427                 if (pos == NULL)
 428                         return NULL;
 429         }
 430
 431         return f_end;
 432 }
 433
 434
 435 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 436 {
 437         struct nai_realm *realm;
 438         const u8 *pos, *end;
 439         u16 i, num;
 440
 441         if (anqp == NULL || wpabuf_len(anqp) < 2)
 442                 return NULL;
 443
 444         pos = wpabuf_head_u8(anqp);
 445         end = pos + wpabuf_len(anqp);
 446         num = WPA_GET_LE16(pos);
 447         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 448         pos += 2;
 449
 450         if (num * 5 > end - pos) {
 451                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 452                            "enough data (%u octets) for that many realms",
 453                            num, (unsigned int) (end - pos));
 454                 return NULL;
 455         }
 456
 457         realm = os_calloc(num, sizeof(struct nai_realm));
 458         if (realm == NULL)
 459                 return NULL;
 460
 461         for (i = 0; i < num; i++) {
 462                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 463                 if (pos == NULL) {
 464                         nai_realm_free(realm, num);
 465                         return NULL;
 466                 }
 467         }
 468
 469         *count = num;
 470         return realm;
 471 }
 472
 473
 474 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 475 {
 476         char *tmp, *pos, *end;
 477         int match = 0;
 478
 479         if (realm->realm == NULL || home_realm == NULL)
 480                 return 0;
 481
 482         if (os_strchr(realm->realm, ';') == NULL)
 483                 return os_strcasecmp(realm->realm, home_realm) == 0;
 484
 485         tmp = os_strdup(realm->realm);
 486         if (tmp == NULL)
 487                 return 0;
 488
 489         pos = tmp;
 490         while (*pos) {
 491                 end = os_strchr(pos, ';');
 492                 if (end)
 493                         *end = '\0';
 494                 if (os_strcasecmp(pos, home_realm) == 0) {
 495                         match = 1;
 496                         break;
 497                 }
 498                 if (end == NULL)
 499                         break;
 500                 pos = end + 1;
 501         }
 502
 503         os_free(tmp);
 504
 505         return match;
 506 }
 507
 508
 509 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 510 {
 511         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 512                 return 0; /* method not supported */
 513
 514         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 515                 /* Only tunneled methods with username/password supported */
 516                 return 0;
 517         }
 518
 519         if (eap->method == EAP_TYPE_PEAP &&
 520             eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 521                 return 0;
 522
 523         if (eap->method == EAP_TYPE_TTLS) {
 524                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 525                         return 0;
 526                 if (eap->inner_method &&
 527                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 528                         return 0;
 529                 if (eap->inner_non_eap &&
 530                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 531                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 532                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 533                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 534                         return 0;
 535         }
 536
 537         if (eap->inner_method &&
 538             eap->inner_method != EAP_TYPE_GTC &&
 539             eap->inner_method != EAP_TYPE_MSCHAPV2)
 540                 return 0;
 541
 542         return 1;
 543 }
 544
 545
 546 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 547 {
 548         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 549                 return 0; /* method not supported */
 550
 551         if (eap->method != EAP_TYPE_TLS) {
 552                 /* Only EAP-TLS supported for credential authentication */
 553                 return 0;
 554         }
 555
 556         return 1;
 557 }
 558
 559
 560 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 561                                                  struct nai_realm *realm)
 562 {
 563         u8 e;
 564
 565         if (cred == NULL ||
 566             cred->username == NULL ||
 567             cred->username[0] == '\0' ||
 568             ((cred->password == NULL ||
 569               cred->password[0] == '\0') &&
 570              (cred->private_key == NULL ||
 571               cred->private_key[0] == '\0')))
 572                 return NULL;
 573
 574         for (e = 0; e < realm->eap_count; e++) {
 575                 struct nai_realm_eap *eap = &realm->eap[e];
 576                 if (cred->password && cred->password[0] &&
 577                     nai_realm_cred_username(eap))
 578                         return eap;
 579                 if (cred->private_key && cred->private_key[0] &&
 580                     nai_realm_cred_cert(eap))
 581                         return eap;
 582         }
 583
 584         return NULL;
 585 }
 586
 587
 588 #ifdef INTERWORKING_3GPP
 589
 590 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 591 {
 592         u8 plmn[3];
 593         const u8 *pos, *end;
 594         u8 udhl;
 595
 596         /* See Annex A of 3GPP TS 24.234 v8.1.0 for description */
 597         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 598         plmn[1] = imsi[2] - '0';
 599         /* default to MNC length 3 if unknown */
 600         if (mnc_len != 2)
 601                 plmn[1] |= (imsi[5] - '0') << 4;
 602         else
 603                 plmn[1] |= 0xf0;
 604         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 605
 606         if (anqp == NULL)
 607                 return 0;
 608         pos = wpabuf_head_u8(anqp);
 609         end = pos + wpabuf_len(anqp);
 610         if (pos + 2 > end)
 611                 return 0;
 612         if (*pos != 0) {
 613                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 614                 return 0;
 615         }
 616         pos++;
 617         udhl = *pos++;
 618         if (pos + udhl > end) {
 619                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 620                 return 0;
 621         }
 622         end = pos + udhl;
 623
 624         while (pos + 2 <= end) {
 625                 u8 iei, len;
 626                 const u8 *l_end;
 627                 iei = *pos++;
 628                 len = *pos++ & 0x7f;
 629                 if (pos + len > end)
 630                         break;
 631                 l_end = pos + len;
 632
 633                 if (iei == 0 && len > 0) {
 634                         /* PLMN List */
 635                         u8 num, i;
 636                         num = *pos++;
 637                         for (i = 0; i < num; i++) {
 638                                 if (pos + 3 > end)
 639                                         break;
 640                                 if (os_memcmp(pos, plmn, 3) == 0)
 641                                         return 1; /* Found matching PLMN */
 642                                 pos += 3;
 643                         }
 644                 }
 645
 646                 pos = l_end;
 647         }
 648
 649         return 0;
 650 }
 651
 652
 653 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 654                           size_t mnc_len, char prefix)
 655 {
 656         const char *sep, *msin;
 657         char *end, *pos;
 658         size_t msin_len, plmn_len;
 659
 660         /*
 661          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 662          * Root NAI:
 663          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 664          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 665          */
 666
 667         if (imsi == NULL || os_strlen(imsi) > 16) {
 668                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 669                 return -1;
 670         }
 671         sep = os_strchr(imsi, '-');
 672         if (sep) {
 673                 plmn_len = sep - imsi;
 674                 msin = sep + 1;
 675         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 676                 plmn_len = 3 + mnc_len;
 677                 msin = imsi + plmn_len;
 678         } else
 679                 return -1;
 680         if (plmn_len != 5 && plmn_len != 6)
 681                 return -1;
 682         msin_len = os_strlen(msin);
 683
 684         pos = nai;
 685         end = nai + nai_len;
 686         if (prefix)
 687                 *pos++ = prefix;
 688         os_memcpy(pos, imsi, plmn_len);
 689         pos += plmn_len;
 690         os_memcpy(pos, msin, msin_len);
 691         pos += msin_len;
 692         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 693         if (plmn_len == 5) {
 694                 *pos++ = '0';
 695                 *pos++ = imsi[3];
 696                 *pos++ = imsi[4];
 697         } else {
 698                 *pos++ = imsi[3];
 699                 *pos++ = imsi[4];
 700                 *pos++ = imsi[5];
 701         }
 702         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 703                            imsi[0], imsi[1], imsi[2]);
 704
 705         return 0;
 706 }
 707
 708
 709 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 710 {
 711         char nai[100];
 712         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 713                 return -1;
 714         return wpa_config_set_quoted(ssid, "identity", nai);
 715 }
 716
 717 #endif /* INTERWORKING_3GPP */
 718
 719
 720 static int interworking_set_hs20_params(struct wpa_ssid *ssid)
 721 {
 722         if (wpa_config_set(ssid, "key_mgmt", "WPA-EAP", 0) < 0)
 723                 return -1;
 724         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 725                 return -1;
 726         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 727                 return -1;
 728         return 0;
 729 }
 730
 731
 732 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 733                                      struct wpa_bss *bss)
 734 {
 735 #ifdef INTERWORKING_3GPP
 736         struct wpa_cred *cred;
 737         struct wpa_ssid *ssid;
 738         const u8 *ie;
 739
 740         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 741                 return -1;
 742
 743         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 744                 char *sep;
 745                 const char *imsi;
 746                 int mnc_len;
 747
 748 #ifdef PCSC_FUNCS
 749                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
 750                     wpa_s->imsi[0]) {
 751                         imsi = wpa_s->imsi;
 752                         mnc_len = wpa_s->mnc_len;
 753                         goto compare;
 754                 }
 755 #endif /* PCSC_FUNCS */
 756
 757                 if (cred->imsi == NULL || !cred->imsi[0] ||
 758                     cred->milenage == NULL || !cred->milenage[0])
 759                         continue;
 760
 761                 sep = os_strchr(cred->imsi, '-');
 762                 if (sep == NULL ||
 763                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
 764                         continue;
 765                 mnc_len = sep - cred->imsi - 3;
 766                 imsi = cred->imsi;
 767
 768 #ifdef PCSC_FUNCS
 769         compare:
 770 #endif /* PCSC_FUNCS */
 771                 if (plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len))
 772                         break;
 773         }
 774         if (cred == NULL)
 775                 return -1;
 776
 777         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 778         if (ie == NULL)
 779                 return -1;
 780         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 781                    MAC2STR(bss->bssid));
 782
 783         ssid = wpa_config_add_network(wpa_s->conf);
 784         if (ssid == NULL)
 785                 return -1;
 786
 787         wpas_notify_network_added(wpa_s, ssid);
 788         wpa_config_set_network_defaults(ssid);
 789         ssid->priority = cred->priority;
 790         ssid->temporary = 1;
 791         ssid->ssid = os_zalloc(ie[1] + 1);
 792         if (ssid->ssid == NULL)
 793                 goto fail;
 794         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 795         ssid->ssid_len = ie[1];
 796
 797         if (interworking_set_hs20_params(ssid) < 0)
 798                 goto fail;
 799
 800         /* TODO: figure out whether to use EAP-SIM, EAP-AKA, or EAP-AKA' */
 801         if (wpa_config_set(ssid, "eap", "SIM", 0) < 0) {
 802                 wpa_printf(MSG_DEBUG, "EAP-SIM not supported");
 803                 goto fail;
 804         }
 805         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 806                 wpa_config_set(ssid, "eap", "AKA", 0);
 807         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, '1') < 0) {
 808                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 809                 goto fail;
 810         }
 811
 812         if (cred->milenage && cred->milenage[0]) {
 813                 if (wpa_config_set_quoted(ssid, "password",
 814                                           cred->milenage) < 0)
 815                         goto fail;
 816         } else if (cred->pcsc) {
 817                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 818                         goto fail;
 819                 if (wpa_s->conf->pcsc_pin &&
 820                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 821                     < 0)
 822                         goto fail;
 823         }
 824
 825         if (cred->password && cred->password[0] &&
 826             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 827                 goto fail;
 828
 829         wpa_config_update_prio_list(wpa_s->conf);
 830         interworking_reconnect(wpa_s);
 831
 832         return 0;
 833
 834 fail:
 835         wpas_notify_network_removed(wpa_s, ssid);
 836         wpa_config_remove_network(wpa_s->conf, ssid->id);
 837 #endif /* INTERWORKING_3GPP */
 838         return -1;
 839 }
 840
 841
 842 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 843                                             size_t rc_len)
 844 {
 845         const u8 *pos, *end;
 846         u8 lens;
 847
 848         if (ie == NULL)
 849                 return 0;
 850
 851         pos = ie + 2;
 852         end = ie + 2 + ie[1];
 853
 854         /* Roaming Consortium element:
 855          * Number of ANQP OIs
 856          * OI #1 and #2 lengths
 857          * OI #1, [OI #2], [OI #3]
 858          */
 859
 860         if (pos + 2 > end)
 861                 return 0;
 862
 863         pos++; /* skip Number of ANQP OIs */
 864         lens = *pos++;
 865         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 866                 return 0;
 867
 868         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 869                 return 1;
 870         pos += lens & 0x0f;
 871
 872         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 873                 return 1;
 874         pos += lens >> 4;
 875
 876         if (pos < end && (size_t) (end - pos) == rc_len &&
 877             os_memcmp(pos, rc_id, rc_len) == 0)
 878                 return 1;
 879
 880         return 0;
 881 }
 882
 883
 884 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 885                                          const u8 *rc_id, size_t rc_len)
 886 {
 887         const u8 *pos, *end;
 888         u8 len;
 889
 890         if (anqp == NULL)
 891                 return 0;
 892
 893         pos = wpabuf_head(anqp);
 894         end = pos + wpabuf_len(anqp);
 895
 896         /* Set of <OI Length, OI> duples */
 897         while (pos < end) {
 898                 len = *pos++;
 899                 if (pos + len > end)
 900                         break;
 901                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 902                         return 1;
 903                 pos += len;
 904         }
 905
 906         return 0;
 907 }
 908
 909
 910 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
 911                                     const u8 *rc_id, size_t rc_len)
 912 {
 913         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
 914                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
 915 }
 916
 917
 918 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 919         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 920 {
 921         struct wpa_cred *cred, *selected = NULL;
 922         const u8 *ie;
 923
 924         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 925
 926         if (ie == NULL &&
 927             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 928                 return NULL;
 929
 930         if (wpa_s->conf->cred == NULL)
 931                 return NULL;
 932
 933         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 934                 if (cred->roaming_consortium_len == 0)
 935                         continue;
 936
 937                 if (!roaming_consortium_match(ie,
 938                                               bss->anqp ?
 939                                               bss->anqp->roaming_consortium :
 940                                               NULL,
 941                                               cred->roaming_consortium,
 942                                               cred->roaming_consortium_len))
 943                         continue;
 944
 945                 if (selected == NULL ||
 946                     selected->priority < cred->priority)
 947                         selected = cred;
 948         }
 949
 950         return selected;
 951 }
 952
 953
 954 static int interworking_set_eap_params(struct wpa_ssid *ssid,
 955                                        struct wpa_cred *cred, int ttls)
 956 {
 957         if (cred->eap_method) {
 958                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
 959                         cred->eap_method->method == EAP_TYPE_TTLS;
 960
 961                 os_free(ssid->eap.eap_methods);
 962                 ssid->eap.eap_methods =
 963                         os_malloc(sizeof(struct eap_method_type) * 2);
 964                 if (ssid->eap.eap_methods == NULL)
 965                         return -1;
 966                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
 967                           sizeof(*cred->eap_method));
 968                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
 969                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
 970         }
 971
 972         if (ttls && cred->username && cred->username[0]) {
 973                 const char *pos;
 974                 char *anon;
 975                 /* Use anonymous NAI in Phase 1 */
 976                 pos = os_strchr(cred->username, '@');
 977                 if (pos) {
 978                         size_t buflen = 9 + os_strlen(pos) + 1;
 979                         anon = os_malloc(buflen);
 980                         if (anon == NULL)
 981                                 return -1;
 982                         os_snprintf(anon, buflen, "anonymous%s", pos);
 983                 } else if (cred->realm) {
 984                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
 985                         anon = os_malloc(buflen);
 986                         if (anon == NULL)
 987                                 return -1;
 988                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
 989                 } else {
 990                         anon = os_strdup("anonymous");
 991                         if (anon == NULL)
 992                                 return -1;
 993                 }
 994                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
 995                     0) {
 996                         os_free(anon);
 997                         return -1;
 998                 }
 999                 os_free(anon);
1000         }
1001
1002         if (cred->username && cred->username[0] &&
1003             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1004                 return -1;
1005
1006         if (cred->password && cred->password[0]) {
1007                 if (cred->ext_password &&
1008                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1009                         return -1;
1010                 if (!cred->ext_password &&
1011                     wpa_config_set_quoted(ssid, "password", cred->password) <
1012                     0)
1013                         return -1;
1014         }
1015
1016         if (cred->client_cert && cred->client_cert[0] &&
1017             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1018                 return -1;
1019
1020         if (cred->private_key && cred->private_key[0] &&
1021             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1022                 return -1;
1023
1024         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1025             wpa_config_set_quoted(ssid, "private_key_passwd",
1026                                   cred->private_key_passwd) < 0)
1027                 return -1;
1028
1029         if (cred->phase1) {
1030                 os_free(ssid->eap.phase1);
1031                 ssid->eap.phase1 = os_strdup(cred->phase1);
1032         }
1033         if (cred->phase2) {
1034                 os_free(ssid->eap.phase2);
1035                 ssid->eap.phase2 = os_strdup(cred->phase2);
1036         }
1037
1038         if (cred->ca_cert && cred->ca_cert[0] &&
1039             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1040                 return -1;
1041
1042         return 0;
1043 }
1044
1045
1046 static int interworking_connect_roaming_consortium(
1047         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1048         struct wpa_bss *bss, const u8 *ssid_ie)
1049 {
1050         struct wpa_ssid *ssid;
1051
1052         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1053                    "roaming consortium match", MAC2STR(bss->bssid));
1054
1055         ssid = wpa_config_add_network(wpa_s->conf);
1056         if (ssid == NULL)
1057                 return -1;
1058         wpas_notify_network_added(wpa_s, ssid);
1059         wpa_config_set_network_defaults(ssid);
1060         ssid->priority = cred->priority;
1061         ssid->temporary = 1;
1062         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1063         if (ssid->ssid == NULL)
1064                 goto fail;
1065         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1066         ssid->ssid_len = ssid_ie[1];
1067
1068         if (interworking_set_hs20_params(ssid) < 0)
1069                 goto fail;
1070
1071         if (cred->eap_method == NULL) {
1072                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1073                            "credential using roaming consortium");
1074                 goto fail;
1075         }
1076
1077         if (interworking_set_eap_params(
1078                     ssid, cred,
1079                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1080                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1081                 goto fail;
1082
1083         wpa_config_update_prio_list(wpa_s->conf);
1084         interworking_reconnect(wpa_s);
1085
1086         return 0;
1087
1088 fail:
1089         wpas_notify_network_removed(wpa_s, ssid);
1090         wpa_config_remove_network(wpa_s->conf, ssid->id);
1091         return -1;
1092 }
1093
1094
1095 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1096 {
1097         struct wpa_cred *cred;
1098         struct wpa_ssid *ssid;
1099         struct nai_realm *realm;
1100         struct nai_realm_eap *eap = NULL;
1101         u16 count, i;
1102         char buf[100];
1103         const u8 *ie;
1104
1105         if (wpa_s->conf->cred == NULL || bss == NULL)
1106                 return -1;
1107         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1108         if (ie == NULL || ie[1] == 0) {
1109                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1110                            MACSTR, MAC2STR(bss->bssid));
1111                 return -1;
1112         }
1113
1114         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1115                 /*
1116                  * We currently support only HS 2.0 networks and those are
1117                  * required to use WPA2-Enterprise.
1118                  */
1119                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1120                            "RSN");
1121                 return -1;
1122         }
1123
1124         cred = interworking_credentials_available_roaming_consortium(wpa_s,
1125                                                                      bss);
1126         if (cred)
1127                 return interworking_connect_roaming_consortium(wpa_s, cred,
1128                                                                bss, ie);
1129
1130         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1131                                 &count);
1132         if (realm == NULL) {
1133                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1134                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1135                 count = 0;
1136         }
1137
1138         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1139                 for (i = 0; i < count; i++) {
1140                         if (!nai_realm_match(&realm[i], cred->realm))
1141                                 continue;
1142                         eap = nai_realm_find_eap(cred, &realm[i]);
1143                         if (eap)
1144                                 break;
1145                 }
1146                 if (eap)
1147                         break;
1148         }
1149
1150         if (!eap) {
1151                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
1152                         if (realm)
1153                                 nai_realm_free(realm, count);
1154                         return 0;
1155                 }
1156
1157                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1158                            "and EAP method found for " MACSTR,
1159                            MAC2STR(bss->bssid));
1160                 nai_realm_free(realm, count);
1161                 return -1;
1162         }
1163
1164         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1165                    MAC2STR(bss->bssid));
1166
1167         ssid = wpa_config_add_network(wpa_s->conf);
1168         if (ssid == NULL) {
1169                 nai_realm_free(realm, count);
1170                 return -1;
1171         }
1172         wpas_notify_network_added(wpa_s, ssid);
1173         wpa_config_set_network_defaults(ssid);
1174         ssid->priority = cred->priority;
1175         ssid->temporary = 1;
1176         ssid->ssid = os_zalloc(ie[1] + 1);
1177         if (ssid->ssid == NULL)
1178                 goto fail;
1179         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1180         ssid->ssid_len = ie[1];
1181
1182         if (interworking_set_hs20_params(ssid) < 0)
1183                 goto fail;
1184
1185         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1186                                                      eap->method), 0) < 0)
1187                 goto fail;
1188
1189         switch (eap->method) {
1190         case EAP_TYPE_TTLS:
1191                 if (eap->inner_method) {
1192                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1193                                     eap_get_name(EAP_VENDOR_IETF,
1194                                                  eap->inner_method));
1195                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1196                                 goto fail;
1197                         break;
1198                 }
1199                 switch (eap->inner_non_eap) {
1200                 case NAI_REALM_INNER_NON_EAP_PAP:
1201                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1202                             0)
1203                                 goto fail;
1204                         break;
1205                 case NAI_REALM_INNER_NON_EAP_CHAP:
1206                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1207                             < 0)
1208                                 goto fail;
1209                         break;
1210                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1211                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1212                                            0) < 0)
1213                                 goto fail;
1214                         break;
1215                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1216                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1217                                            0) < 0)
1218                                 goto fail;
1219                         break;
1220                 }
1221                 break;
1222         case EAP_TYPE_PEAP:
1223                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1224                             eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
1225                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1226                         goto fail;
1227                 break;
1228         case EAP_TYPE_TLS:
1229                 break;
1230         }
1231
1232         if (interworking_set_eap_params(ssid, cred,
1233                                         eap->method == EAP_TYPE_TTLS) < 0)
1234                 goto fail;
1235
1236         nai_realm_free(realm, count);
1237
1238         wpa_config_update_prio_list(wpa_s->conf);
1239         interworking_reconnect(wpa_s);
1240
1241         return 0;
1242
1243 fail:
1244         wpas_notify_network_removed(wpa_s, ssid);
1245         wpa_config_remove_network(wpa_s->conf, ssid->id);
1246         nai_realm_free(realm, count);
1247         return -1;
1248 }
1249
1250
1251 static struct wpa_cred * interworking_credentials_available_3gpp(
1252         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1253 {
1254         struct wpa_cred *cred, *selected = NULL;
1255         int ret;
1256
1257 #ifdef INTERWORKING_3GPP
1258         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1259                 return NULL;
1260
1261         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1262                 char *sep;
1263                 const char *imsi;
1264                 int mnc_len;
1265
1266 #ifdef PCSC_FUNCS
1267                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1268                     wpa_s->imsi[0]) {
1269                         imsi = wpa_s->imsi;
1270                         mnc_len = wpa_s->mnc_len;
1271                         goto compare;
1272                 }
1273 #endif /* PCSC_FUNCS */
1274
1275                 if (cred->imsi == NULL || !cred->imsi[0] ||
1276                     cred->milenage == NULL || !cred->milenage[0])
1277                         continue;
1278
1279                 sep = os_strchr(cred->imsi, '-');
1280                 if (sep == NULL ||
1281                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1282                         continue;
1283                 mnc_len = sep - cred->imsi - 3;
1284                 imsi = cred->imsi;
1285
1286 #ifdef PCSC_FUNCS
1287         compare:
1288 #endif /* PCSC_FUNCS */
1289                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1290                            MACSTR, MAC2STR(bss->bssid));
1291                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1292                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1293                 if (ret) {
1294                         if (selected == NULL ||
1295                             selected->priority < cred->priority)
1296                                 selected = cred;
1297                 }
1298         }
1299 #endif /* INTERWORKING_3GPP */
1300         return selected;
1301 }
1302
1303
1304 static struct wpa_cred * interworking_credentials_available_realm(
1305         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1306 {
1307         struct wpa_cred *cred, *selected = NULL;
1308         struct nai_realm *realm;
1309         u16 count, i;
1310
1311         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1312                 return NULL;
1313
1314         if (wpa_s->conf->cred == NULL)
1315                 return NULL;
1316
1317         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1318                    MACSTR, MAC2STR(bss->bssid));
1319         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1320         if (realm == NULL) {
1321                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1322                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1323                 return NULL;
1324         }
1325
1326         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1327                 if (cred->realm == NULL)
1328                         continue;
1329
1330                 for (i = 0; i < count; i++) {
1331                         if (!nai_realm_match(&realm[i], cred->realm))
1332                                 continue;
1333                         if (nai_realm_find_eap(cred, &realm[i])) {
1334                                 if (selected == NULL ||
1335                                     selected->priority < cred->priority)
1336                                         selected = cred;
1337                                 break;
1338                         }
1339                 }
1340         }
1341
1342         nai_realm_free(realm, count);
1343
1344         return selected;
1345 }
1346
1347
1348 static struct wpa_cred * interworking_credentials_available(
1349         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1350 {
1351         struct wpa_cred *cred, *cred2;
1352
1353         cred = interworking_credentials_available_realm(wpa_s, bss);
1354         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1355         if (cred && cred2 && cred2->priority >= cred->priority)
1356                 cred = cred2;
1357         if (!cred)
1358                 cred = cred2;
1359
1360         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1361                                                                       bss);
1362         if (cred && cred2 && cred2->priority >= cred->priority)
1363                 cred = cred2;
1364         if (!cred)
1365                 cred = cred2;
1366
1367         return cred;
1368 }
1369
1370
1371 static int domain_name_list_contains(struct wpabuf *domain_names,
1372                                      const char *domain)
1373 {
1374         const u8 *pos, *end;
1375         size_t len;
1376
1377         len = os_strlen(domain);
1378         pos = wpabuf_head(domain_names);
1379         end = pos + wpabuf_len(domain_names);
1380
1381         while (pos + 1 < end) {
1382                 if (pos + 1 + pos[0] > end)
1383                         break;
1384
1385                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1386                                   pos + 1, pos[0]);
1387                 if (pos[0] == len &&
1388                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1389                         return 1;
1390
1391                 pos += 1 + pos[0];
1392         }
1393
1394         return 0;
1395 }
1396
1397
1398 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1399                                 struct wpabuf *domain_names)
1400 {
1401         struct wpa_cred *cred;
1402 #ifdef INTERWORKING_3GPP
1403         char nai[100], *realm;
1404 #endif /* INTERWORKING_3GPP */
1405
1406         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1407                 return -1;
1408
1409         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1410 #ifdef INTERWORKING_3GPP
1411                 char *imsi = NULL;
1412                 int mnc_len = 0;
1413                 if (cred->imsi)
1414                         imsi = cred->imsi;
1415 #ifdef CONFIG_PCSC
1416                 else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1417                          wpa_s->scard && wpa_s->imsi[0]) {
1418                         imsi = wpa_s->imsi;
1419                         mnc_len = wpa_s->mnc_len;
1420                 }
1421 #endif /* CONFIG_PCSC */
1422                 if (imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0)
1423                     == 0) {
1424                         realm = os_strchr(nai, '@');
1425                         if (realm)
1426                                 realm++;
1427                         wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1428                                    "with SIM/USIM domain %s", realm);
1429                         if (realm &&
1430                             domain_name_list_contains(domain_names, realm))
1431                                 return 1;
1432                 }
1433 #endif /* INTERWORKING_3GPP */
1434
1435                 if (cred->domain == NULL)
1436                         continue;
1437
1438                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1439                            "home SP FQDN %s", cred->domain);
1440                 if (domain_name_list_contains(domain_names, cred->domain))
1441                         return 1;
1442         }
1443
1444         return 0;
1445 }
1446
1447
1448 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1449 {
1450         struct wpa_bss *bss;
1451         struct wpa_ssid *ssid;
1452
1453         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1454                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1455                         if (wpas_network_disabled(wpa_s, ssid) ||
1456                             ssid->mode != WPAS_MODE_INFRA)
1457                                 continue;
1458                         if (ssid->ssid_len != bss->ssid_len ||
1459                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1460                             0)
1461                                 continue;
1462                         /*
1463                          * TODO: Consider more accurate matching of security
1464                          * configuration similarly to what is done in events.c
1465                          */
1466                         return 1;
1467                 }
1468         }
1469
1470         return 0;
1471 }
1472
1473
1474 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1475 {
1476         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1477         int selected_prio = -999999, selected_home_prio = -999999;
1478         unsigned int count = 0;
1479         const char *type;
1480         int res;
1481         struct wpa_cred *cred;
1482
1483         wpa_s->network_select = 0;
1484
1485         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1486                 cred = interworking_credentials_available(wpa_s, bss);
1487                 if (!cred)
1488                         continue;
1489                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1490                         /*
1491                          * We currently support only HS 2.0 networks and those
1492                          * are required to use WPA2-Enterprise.
1493                          */
1494                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1495                                    "with " MACSTR " but network does not use "
1496                                    "RSN", MAC2STR(bss->bssid));
1497                         continue;
1498                 }
1499                 count++;
1500                 res = interworking_home_sp(wpa_s, bss->anqp ?
1501                                            bss->anqp->domain_name : NULL);
1502                 if (res > 0)
1503                         type = "home";
1504                 else if (res == 0)
1505                         type = "roaming";
1506                 else
1507                         type = "unknown";
1508                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1509                         MAC2STR(bss->bssid), type);
1510                 if (wpa_s->auto_select ||
1511                     (wpa_s->conf->auto_interworking &&
1512                      wpa_s->auto_network_select)) {
1513                         if (selected == NULL ||
1514                             cred->priority > selected_prio) {
1515                                 selected = bss;
1516                                 selected_prio = cred->priority;
1517                         }
1518                         if (res > 0 &&
1519                             (selected_home == NULL ||
1520                              cred->priority > selected_home_prio)) {
1521                                 selected_home = bss;
1522                                 selected_home_prio = cred->priority;
1523                         }
1524                 }
1525         }
1526
1527         if (selected_home && selected_home != selected &&
1528             selected_home_prio >= selected_prio) {
1529                 /* Prefer network operated by the Home SP */
1530                 selected = selected_home;
1531         }
1532
1533         if (count == 0) {
1534                 /*
1535                  * No matching network was found based on configured
1536                  * credentials. Check whether any of the enabled network blocks
1537                  * have matching APs.
1538                  */
1539                 if (interworking_find_network_match(wpa_s)) {
1540                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1541                                    "match for enabled network configurations");
1542                         if (wpa_s->auto_select)
1543                                 interworking_reconnect(wpa_s);
1544                         return;
1545                 }
1546
1547                 if (wpa_s->auto_network_select) {
1548                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1549                                    "scanning after ANQP fetch");
1550                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1551                                                 0);
1552                         return;
1553                 }
1554
1555                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1556                         "with matching credentials found");
1557         }
1558
1559         if (selected)
1560                 interworking_connect(wpa_s, selected);
1561 }
1562
1563
1564 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1565 {
1566         struct wpa_bss *bss;
1567         int found = 0;
1568         const u8 *ie;
1569
1570         if (!wpa_s->fetch_anqp_in_progress)
1571                 return;
1572
1573         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1574                 if (!(bss->caps & IEEE80211_CAP_ESS))
1575                         continue;
1576                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1577                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1578                         continue; /* AP does not support Interworking */
1579
1580                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1581                         if (bss->anqp == NULL) {
1582                                 bss->anqp = wpa_bss_anqp_alloc();
1583                                 if (bss->anqp == NULL)
1584                                         break;
1585                         }
1586                         found++;
1587                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1588                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1589                                 MACSTR, MAC2STR(bss->bssid));
1590                         interworking_anqp_send_req(wpa_s, bss);
1591                         break;
1592                 }
1593         }
1594
1595         if (found == 0) {
1596                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1597                 wpa_s->fetch_anqp_in_progress = 0;
1598                 if (wpa_s->network_select)
1599                         interworking_select_network(wpa_s);
1600         }
1601 }
1602
1603
1604 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1605 {
1606         struct wpa_bss *bss;
1607
1608         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1609                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1610
1611         wpa_s->fetch_anqp_in_progress = 1;
1612         interworking_next_anqp_fetch(wpa_s);
1613 }
1614
1615
1616 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1617 {
1618         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1619                 return 0;
1620
1621         wpa_s->network_select = 0;
1622         wpa_s->fetch_all_anqp = 1;
1623
1624         interworking_start_fetch_anqp(wpa_s);
1625
1626         return 0;
1627 }
1628
1629
1630 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1631 {
1632         if (!wpa_s->fetch_anqp_in_progress)
1633                 return;
1634
1635         wpa_s->fetch_anqp_in_progress = 0;
1636 }
1637
1638
1639 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1640                   u16 info_ids[], size_t num_ids)
1641 {
1642         struct wpabuf *buf;
1643         int ret = 0;
1644         int freq;
1645         struct wpa_bss *bss;
1646         int res;
1647
1648         freq = wpa_s->assoc_freq;
1649         bss = wpa_bss_get_bssid(wpa_s, dst);
1650         if (bss)
1651                 freq = bss->freq;
1652         if (freq <= 0)
1653                 return -1;
1654
1655         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1656                    MAC2STR(dst), (unsigned int) num_ids);
1657
1658         buf = anqp_build_req(info_ids, num_ids, NULL);
1659         if (buf == NULL)
1660                 return -1;
1661
1662         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1663         if (res < 0) {
1664                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1665                 ret = -1;
1666         } else
1667                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1668                            "%u", res);
1669
1670         wpabuf_free(buf);
1671         return ret;
1672 }
1673
1674
1675 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1676                                             const u8 *sa, u16 info_id,
1677                                             const u8 *data, size_t slen)
1678 {
1679         const u8 *pos = data;
1680         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1681         struct wpa_bss_anqp *anqp = NULL;
1682 #ifdef CONFIG_HS20
1683         u8 type;
1684 #endif /* CONFIG_HS20 */
1685
1686         if (bss)
1687                 anqp = bss->anqp;
1688
1689         switch (info_id) {
1690         case ANQP_CAPABILITY_LIST:
1691                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1692                         " ANQP Capability list", MAC2STR(sa));
1693                 break;
1694         case ANQP_VENUE_NAME:
1695                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1696                         " Venue Name", MAC2STR(sa));
1697                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1698                 if (anqp) {
1699                         wpabuf_free(anqp->venue_name);
1700                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1701                 }
1702                 break;
1703         case ANQP_NETWORK_AUTH_TYPE:
1704                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1705                         " Network Authentication Type information",
1706                         MAC2STR(sa));
1707                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1708                                   "Type", pos, slen);
1709                 if (anqp) {
1710                         wpabuf_free(anqp->network_auth_type);
1711                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1712                 }
1713                 break;
1714         case ANQP_ROAMING_CONSORTIUM:
1715                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1716                         " Roaming Consortium list", MAC2STR(sa));
1717                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1718                                   pos, slen);
1719                 if (anqp) {
1720                         wpabuf_free(anqp->roaming_consortium);
1721                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1722                 }
1723                 break;
1724         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1725                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1726                         " IP Address Type Availability information",
1727                         MAC2STR(sa));
1728                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1729                             pos, slen);
1730                 if (anqp) {
1731                         wpabuf_free(anqp->ip_addr_type_availability);
1732                         anqp->ip_addr_type_availability =
1733                                 wpabuf_alloc_copy(pos, slen);
1734                 }
1735                 break;
1736         case ANQP_NAI_REALM:
1737                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1738                         " NAI Realm list", MAC2STR(sa));
1739                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1740                 if (anqp) {
1741                         wpabuf_free(anqp->nai_realm);
1742                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1743                 }
1744                 break;
1745         case ANQP_3GPP_CELLULAR_NETWORK:
1746                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1747                         " 3GPP Cellular Network information", MAC2STR(sa));
1748                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1749                                   pos, slen);
1750                 if (anqp) {
1751                         wpabuf_free(anqp->anqp_3gpp);
1752                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1753                 }
1754                 break;
1755         case ANQP_DOMAIN_NAME:
1756                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1757                         " Domain Name list", MAC2STR(sa));
1758                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1759                 if (anqp) {
1760                         wpabuf_free(anqp->domain_name);
1761                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1762                 }
1763                 break;
1764         case ANQP_VENDOR_SPECIFIC:
1765                 if (slen < 3)
1766                         return;
1767
1768                 switch (WPA_GET_BE24(pos)) {
1769 #ifdef CONFIG_HS20
1770                 case OUI_WFA:
1771                         pos += 3;
1772                         slen -= 3;
1773
1774                         if (slen < 1)
1775                                 return;
1776                         type = *pos++;
1777                         slen--;
1778
1779                         switch (type) {
1780                         case HS20_ANQP_OUI_TYPE:
1781                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1782                                                              slen);
1783                                 break;
1784                         default:
1785                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1786                                            "vendor type %u", type);
1787                                 break;
1788                         }
1789                         break;
1790 #endif /* CONFIG_HS20 */
1791                 default:
1792                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1793                                    "vendor-specific ANQP OUI %06x",
1794                                    WPA_GET_BE24(pos));
1795                         return;
1796                 }
1797                 break;
1798         default:
1799                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1800                            "%u", info_id);
1801                 break;
1802         }
1803 }
1804
1805
1806 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1807                   enum gas_query_result result,
1808                   const struct wpabuf *adv_proto,
1809                   const struct wpabuf *resp, u16 status_code)
1810 {
1811         struct wpa_supplicant *wpa_s = ctx;
1812         const u8 *pos;
1813         const u8 *end;
1814         u16 info_id;
1815         u16 slen;
1816
1817         if (result != GAS_QUERY_SUCCESS)
1818                 return;
1819
1820         pos = wpabuf_head(adv_proto);
1821         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1822             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1823                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1824                            "Protocol in response");
1825                 return;
1826         }
1827
1828         pos = wpabuf_head(resp);
1829         end = pos + wpabuf_len(resp);
1830
1831         while (pos < end) {
1832                 if (pos + 4 > end) {
1833                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1834                         break;
1835                 }
1836                 info_id = WPA_GET_LE16(pos);
1837                 pos += 2;
1838                 slen = WPA_GET_LE16(pos);
1839                 pos += 2;
1840                 if (pos + slen > end) {
1841                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1842                                    "for Info ID %u", info_id);
1843                         break;
1844                 }
1845                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1846                                                 slen);
1847                 pos += slen;
1848         }
1849 }
1850
1851
1852 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1853                                           struct wpa_scan_results *scan_res)
1854 {
1855         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1856                    "ANQP fetch");
1857         interworking_start_fetch_anqp(wpa_s);
1858 }
1859
1860
1861 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1862 {
1863         interworking_stop_fetch_anqp(wpa_s);
1864         wpa_s->network_select = 1;
1865         wpa_s->auto_network_select = 0;
1866         wpa_s->auto_select = !!auto_select;
1867         wpa_s->fetch_all_anqp = 0;
1868         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
1869                    "selection");
1870         wpa_s->scan_res_handler = interworking_scan_res_handler;
1871         wpa_s->scan_req = 2;
1872         wpa_supplicant_req_scan(wpa_s, 0, 0);
1873
1874         return 0;
1875 }
1876
1877
1878 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
1879                         enum gas_query_result result,
1880                         const struct wpabuf *adv_proto,
1881                         const struct wpabuf *resp, u16 status_code)
1882 {
1883         struct wpa_supplicant *wpa_s = ctx;
1884
1885         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
1886                 " dialog_token=%d status_code=%d resp_len=%d",
1887                 MAC2STR(addr), dialog_token, status_code,
1888                 resp ? (int) wpabuf_len(resp) : -1);
1889         if (!resp)
1890                 return;
1891
1892         wpabuf_free(wpa_s->last_gas_resp);
1893         wpa_s->last_gas_resp = wpabuf_dup(resp);
1894         if (wpa_s->last_gas_resp == NULL)
1895                 return;
1896         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
1897         wpa_s->last_gas_dialog_token = dialog_token;
1898 }
1899
1900
1901 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
1902                      const struct wpabuf *adv_proto,
1903                      const struct wpabuf *query)
1904 {
1905         struct wpabuf *buf;
1906         int ret = 0;
1907         int freq;
1908         struct wpa_bss *bss;
1909         int res;
1910         size_t len;
1911         u8 query_resp_len_limit = 0, pame_bi = 0;
1912
1913         freq = wpa_s->assoc_freq;
1914         bss = wpa_bss_get_bssid(wpa_s, dst);
1915         if (bss)
1916                 freq = bss->freq;
1917         if (freq <= 0)
1918                 return -1;
1919
1920         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
1921                    MAC2STR(dst), freq);
1922         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
1923         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
1924
1925         len = 3 + wpabuf_len(adv_proto) + 2;
1926         if (query)
1927                 len += wpabuf_len(query);
1928         buf = gas_build_initial_req(0, len);
1929         if (buf == NULL)
1930                 return -1;
1931
1932         /* Advertisement Protocol IE */
1933         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
1934         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
1935         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
1936                       (pame_bi ? 0x80 : 0));
1937         wpabuf_put_buf(buf, adv_proto);
1938
1939         /* GAS Query */
1940         if (query) {
1941                 wpabuf_put_le16(buf, wpabuf_len(query));
1942                 wpabuf_put_buf(buf, query);
1943         } else
1944                 wpabuf_put_le16(buf, 0);
1945
1946         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
1947         if (res < 0) {
1948                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
1949                 ret = -1;
1950         } else
1951                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
1952                            "%u", res);
1953
1954         wpabuf_free(buf);
1955         return ret;
1956 }