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_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_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 && bss->anqp_roaming_consortium == NULL)
 927                 return NULL;
 928
 929         if (wpa_s->conf->cred == NULL)
 930                 return NULL;
 931
 932         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 933                 if (cred->roaming_consortium_len == 0)
 934                         continue;
 935
 936                 if (!roaming_consortium_match(ie, bss->anqp_roaming_consortium,
 937                                               cred->roaming_consortium,
 938                                               cred->roaming_consortium_len))
 939                         continue;
 940
 941                 if (selected == NULL ||
 942                     selected->priority < cred->priority)
 943                         selected = cred;
 944         }
 945
 946         return selected;
 947 }
 948
 949
 950 static int interworking_set_eap_params(struct wpa_ssid *ssid,
 951                                        struct wpa_cred *cred, int ttls)
 952 {
 953         if (cred->eap_method) {
 954                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
 955                         cred->eap_method->method == EAP_TYPE_TTLS;
 956
 957                 os_free(ssid->eap.eap_methods);
 958                 ssid->eap.eap_methods =
 959                         os_malloc(sizeof(struct eap_method_type) * 2);
 960                 if (ssid->eap.eap_methods == NULL)
 961                         return -1;
 962                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
 963                           sizeof(*cred->eap_method));
 964                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
 965                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
 966         }
 967
 968         if (ttls && cred->username && cred->username[0]) {
 969                 const char *pos;
 970                 char *anon;
 971                 /* Use anonymous NAI in Phase 1 */
 972                 pos = os_strchr(cred->username, '@');
 973                 if (pos) {
 974                         size_t buflen = 9 + os_strlen(pos) + 1;
 975                         anon = os_malloc(buflen);
 976                         if (anon == NULL)
 977                                 return -1;
 978                         os_snprintf(anon, buflen, "anonymous%s", pos);
 979                 } else if (cred->realm) {
 980                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
 981                         anon = os_malloc(buflen);
 982                         if (anon == NULL)
 983                                 return -1;
 984                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
 985                 } else {
 986                         anon = os_strdup("anonymous");
 987                         if (anon == NULL)
 988                                 return -1;
 989                 }
 990                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
 991                     0) {
 992                         os_free(anon);
 993                         return -1;
 994                 }
 995                 os_free(anon);
 996         }
 997
 998         if (cred->username && cred->username[0] &&
 999             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1000                 return -1;
1001
1002         if (cred->password && cred->password[0]) {
1003                 if (cred->ext_password &&
1004                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1005                         return -1;
1006                 if (!cred->ext_password &&
1007                     wpa_config_set_quoted(ssid, "password", cred->password) <
1008                     0)
1009                         return -1;
1010         }
1011
1012         if (cred->client_cert && cred->client_cert[0] &&
1013             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1014                 return -1;
1015
1016         if (cred->private_key && cred->private_key[0] &&
1017             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1018                 return -1;
1019
1020         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1021             wpa_config_set_quoted(ssid, "private_key_passwd",
1022                                   cred->private_key_passwd) < 0)
1023                 return -1;
1024
1025         if (cred->phase1) {
1026                 os_free(ssid->eap.phase1);
1027                 ssid->eap.phase1 = os_strdup(cred->phase1);
1028         }
1029         if (cred->phase2) {
1030                 os_free(ssid->eap.phase2);
1031                 ssid->eap.phase2 = os_strdup(cred->phase2);
1032         }
1033
1034         if (cred->ca_cert && cred->ca_cert[0] &&
1035             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1036                 return -1;
1037
1038         return 0;
1039 }
1040
1041
1042 static int interworking_connect_roaming_consortium(
1043         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1044         struct wpa_bss *bss, const u8 *ssid_ie)
1045 {
1046         struct wpa_ssid *ssid;
1047
1048         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1049                    "roaming consortium match", MAC2STR(bss->bssid));
1050
1051         ssid = wpa_config_add_network(wpa_s->conf);
1052         if (ssid == NULL)
1053                 return -1;
1054         wpas_notify_network_added(wpa_s, ssid);
1055         wpa_config_set_network_defaults(ssid);
1056         ssid->priority = cred->priority;
1057         ssid->temporary = 1;
1058         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1059         if (ssid->ssid == NULL)
1060                 goto fail;
1061         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1062         ssid->ssid_len = ssid_ie[1];
1063
1064         if (interworking_set_hs20_params(ssid) < 0)
1065                 goto fail;
1066
1067         if (cred->eap_method == NULL) {
1068                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1069                            "credential using roaming consortium");
1070                 goto fail;
1071         }
1072
1073         if (interworking_set_eap_params(
1074                     ssid, cred,
1075                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1076                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1077                 goto fail;
1078
1079         wpa_config_update_prio_list(wpa_s->conf);
1080         interworking_reconnect(wpa_s);
1081
1082         return 0;
1083
1084 fail:
1085         wpas_notify_network_removed(wpa_s, ssid);
1086         wpa_config_remove_network(wpa_s->conf, ssid->id);
1087         return -1;
1088 }
1089
1090
1091 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1092 {
1093         struct wpa_cred *cred;
1094         struct wpa_ssid *ssid;
1095         struct nai_realm *realm;
1096         struct nai_realm_eap *eap = NULL;
1097         u16 count, i;
1098         char buf[100];
1099         const u8 *ie;
1100
1101         if (wpa_s->conf->cred == NULL || bss == NULL)
1102                 return -1;
1103         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1104         if (ie == NULL || ie[1] == 0) {
1105                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1106                            MACSTR, MAC2STR(bss->bssid));
1107                 return -1;
1108         }
1109
1110         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1111                 /*
1112                  * We currently support only HS 2.0 networks and those are
1113                  * required to use WPA2-Enterprise.
1114                  */
1115                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1116                            "RSN");
1117                 return -1;
1118         }
1119
1120         cred = interworking_credentials_available_roaming_consortium(wpa_s,
1121                                                                      bss);
1122         if (cred)
1123                 return interworking_connect_roaming_consortium(wpa_s, cred,
1124                                                                bss, ie);
1125
1126         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
1127         if (realm == NULL) {
1128                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1129                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1130                 count = 0;
1131         }
1132
1133         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1134                 for (i = 0; i < count; i++) {
1135                         if (!nai_realm_match(&realm[i], cred->realm))
1136                                 continue;
1137                         eap = nai_realm_find_eap(cred, &realm[i]);
1138                         if (eap)
1139                                 break;
1140                 }
1141                 if (eap)
1142                         break;
1143         }
1144
1145         if (!eap) {
1146                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
1147                         if (realm)
1148                                 nai_realm_free(realm, count);
1149                         return 0;
1150                 }
1151
1152                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1153                            "and EAP method found for " MACSTR,
1154                            MAC2STR(bss->bssid));
1155                 nai_realm_free(realm, count);
1156                 return -1;
1157         }
1158
1159         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1160                    MAC2STR(bss->bssid));
1161
1162         ssid = wpa_config_add_network(wpa_s->conf);
1163         if (ssid == NULL) {
1164                 nai_realm_free(realm, count);
1165                 return -1;
1166         }
1167         wpas_notify_network_added(wpa_s, ssid);
1168         wpa_config_set_network_defaults(ssid);
1169         ssid->priority = cred->priority;
1170         ssid->temporary = 1;
1171         ssid->ssid = os_zalloc(ie[1] + 1);
1172         if (ssid->ssid == NULL)
1173                 goto fail;
1174         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1175         ssid->ssid_len = ie[1];
1176
1177         if (interworking_set_hs20_params(ssid) < 0)
1178                 goto fail;
1179
1180         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1181                                                      eap->method), 0) < 0)
1182                 goto fail;
1183
1184         switch (eap->method) {
1185         case EAP_TYPE_TTLS:
1186                 if (eap->inner_method) {
1187                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1188                                     eap_get_name(EAP_VENDOR_IETF,
1189                                                  eap->inner_method));
1190                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1191                                 goto fail;
1192                         break;
1193                 }
1194                 switch (eap->inner_non_eap) {
1195                 case NAI_REALM_INNER_NON_EAP_PAP:
1196                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1197                             0)
1198                                 goto fail;
1199                         break;
1200                 case NAI_REALM_INNER_NON_EAP_CHAP:
1201                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1202                             < 0)
1203                                 goto fail;
1204                         break;
1205                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1206                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1207                                            0) < 0)
1208                                 goto fail;
1209                         break;
1210                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1211                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1212                                            0) < 0)
1213                                 goto fail;
1214                         break;
1215                 }
1216                 break;
1217         case EAP_TYPE_PEAP:
1218                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1219                             eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
1220                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1221                         goto fail;
1222                 break;
1223         case EAP_TYPE_TLS:
1224                 break;
1225         }
1226
1227         if (interworking_set_eap_params(ssid, cred,
1228                                         eap->method == EAP_TYPE_TTLS) < 0)
1229                 goto fail;
1230
1231         nai_realm_free(realm, count);
1232
1233         wpa_config_update_prio_list(wpa_s->conf);
1234         interworking_reconnect(wpa_s);
1235
1236         return 0;
1237
1238 fail:
1239         wpas_notify_network_removed(wpa_s, ssid);
1240         wpa_config_remove_network(wpa_s->conf, ssid->id);
1241         nai_realm_free(realm, count);
1242         return -1;
1243 }
1244
1245
1246 static struct wpa_cred * interworking_credentials_available_3gpp(
1247         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1248 {
1249         struct wpa_cred *cred, *selected = NULL;
1250         int ret;
1251
1252 #ifdef INTERWORKING_3GPP
1253         if (bss->anqp_3gpp == NULL)
1254                 return NULL;
1255
1256         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1257                 char *sep;
1258                 const char *imsi;
1259                 int mnc_len;
1260
1261 #ifdef PCSC_FUNCS
1262                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1263                     wpa_s->imsi[0]) {
1264                         imsi = wpa_s->imsi;
1265                         mnc_len = wpa_s->mnc_len;
1266                         goto compare;
1267                 }
1268 #endif /* PCSC_FUNCS */
1269
1270                 if (cred->imsi == NULL || !cred->imsi[0] ||
1271                     cred->milenage == NULL || !cred->milenage[0])
1272                         continue;
1273
1274                 sep = os_strchr(cred->imsi, '-');
1275                 if (sep == NULL ||
1276                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1277                         continue;
1278                 mnc_len = sep - cred->imsi - 3;
1279                 imsi = cred->imsi;
1280
1281 #ifdef PCSC_FUNCS
1282         compare:
1283 #endif /* PCSC_FUNCS */
1284                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1285                            MACSTR, MAC2STR(bss->bssid));
1286                 ret = plmn_id_match(bss->anqp_3gpp, imsi, mnc_len);
1287                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1288                 if (ret) {
1289                         if (selected == NULL ||
1290                             selected->priority < cred->priority)
1291                                 selected = cred;
1292                 }
1293         }
1294 #endif /* INTERWORKING_3GPP */
1295         return selected;
1296 }
1297
1298
1299 static struct wpa_cred * interworking_credentials_available_realm(
1300         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1301 {
1302         struct wpa_cred *cred, *selected = NULL;
1303         struct nai_realm *realm;
1304         u16 count, i;
1305
1306         if (bss->anqp_nai_realm == NULL)
1307                 return NULL;
1308
1309         if (wpa_s->conf->cred == NULL)
1310                 return NULL;
1311
1312         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1313                    MACSTR, MAC2STR(bss->bssid));
1314         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
1315         if (realm == NULL) {
1316                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1317                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1318                 return NULL;
1319         }
1320
1321         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1322                 if (cred->realm == NULL)
1323                         continue;
1324
1325                 for (i = 0; i < count; i++) {
1326                         if (!nai_realm_match(&realm[i], cred->realm))
1327                                 continue;
1328                         if (nai_realm_find_eap(cred, &realm[i])) {
1329                                 if (selected == NULL ||
1330                                     selected->priority < cred->priority)
1331                                         selected = cred;
1332                                 break;
1333                         }
1334                 }
1335         }
1336
1337         nai_realm_free(realm, count);
1338
1339         return selected;
1340 }
1341
1342
1343 static struct wpa_cred * interworking_credentials_available(
1344         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1345 {
1346         struct wpa_cred *cred, *cred2;
1347
1348         cred = interworking_credentials_available_realm(wpa_s, bss);
1349         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1350         if (cred && cred2 && cred2->priority >= cred->priority)
1351                 cred = cred2;
1352         if (!cred)
1353                 cred = cred2;
1354
1355         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1356                                                                       bss);
1357         if (cred && cred2 && cred2->priority >= cred->priority)
1358                 cred = cred2;
1359         if (!cred)
1360                 cred = cred2;
1361
1362         return cred;
1363 }
1364
1365
1366 static int domain_name_list_contains(struct wpabuf *domain_names,
1367                                      const char *domain)
1368 {
1369         const u8 *pos, *end;
1370         size_t len;
1371
1372         len = os_strlen(domain);
1373         pos = wpabuf_head(domain_names);
1374         end = pos + wpabuf_len(domain_names);
1375
1376         while (pos + 1 < end) {
1377                 if (pos + 1 + pos[0] > end)
1378                         break;
1379
1380                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1381                                   pos + 1, pos[0]);
1382                 if (pos[0] == len &&
1383                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1384                         return 1;
1385
1386                 pos += 1 + pos[0];
1387         }
1388
1389         return 0;
1390 }
1391
1392
1393 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1394                                 struct wpabuf *domain_names)
1395 {
1396         struct wpa_cred *cred;
1397 #ifdef INTERWORKING_3GPP
1398         char nai[100], *realm;
1399 #endif /* INTERWORKING_3GPP */
1400
1401         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1402                 return -1;
1403
1404         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1405 #ifdef INTERWORKING_3GPP
1406                 char *imsi = NULL;
1407                 int mnc_len = 0;
1408                 if (cred->imsi)
1409                         imsi = cred->imsi;
1410 #ifdef CONFIG_PCSC
1411                 else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1412                          wpa_s->scard && wpa_s->imsi[0]) {
1413                         imsi = wpa_s->imsi;
1414                         mnc_len = wpa_s->mnc_len;
1415                 }
1416 #endif /* CONFIG_PCSC */
1417                 if (imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0)
1418                     == 0) {
1419                         realm = os_strchr(nai, '@');
1420                         if (realm)
1421                                 realm++;
1422                         wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1423                                    "with SIM/USIM domain %s", realm);
1424                         if (realm &&
1425                             domain_name_list_contains(domain_names, realm))
1426                                 return 1;
1427                 }
1428 #endif /* INTERWORKING_3GPP */
1429
1430                 if (cred->domain == NULL)
1431                         continue;
1432
1433                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1434                            "home SP FQDN %s", cred->domain);
1435                 if (domain_name_list_contains(domain_names, cred->domain))
1436                         return 1;
1437         }
1438
1439         return 0;
1440 }
1441
1442
1443 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1444 {
1445         struct wpa_bss *bss;
1446         struct wpa_ssid *ssid;
1447
1448         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1449                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1450                         if (wpas_network_disabled(wpa_s, ssid) ||
1451                             ssid->mode != WPAS_MODE_INFRA)
1452                                 continue;
1453                         if (ssid->ssid_len != bss->ssid_len ||
1454                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1455                             0)
1456                                 continue;
1457                         /*
1458                          * TODO: Consider more accurate matching of security
1459                          * configuration similarly to what is done in events.c
1460                          */
1461                         return 1;
1462                 }
1463         }
1464
1465         return 0;
1466 }
1467
1468
1469 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1470 {
1471         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1472         int selected_prio = -999999, selected_home_prio = -999999;
1473         unsigned int count = 0;
1474         const char *type;
1475         int res;
1476         struct wpa_cred *cred;
1477
1478         wpa_s->network_select = 0;
1479
1480         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1481                 cred = interworking_credentials_available(wpa_s, bss);
1482                 if (!cred)
1483                         continue;
1484                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1485                         /*
1486                          * We currently support only HS 2.0 networks and those
1487                          * are required to use WPA2-Enterprise.
1488                          */
1489                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1490                                    "with " MACSTR " but network does not use "
1491                                    "RSN", MAC2STR(bss->bssid));
1492                         continue;
1493                 }
1494                 count++;
1495                 res = interworking_home_sp(wpa_s, bss->anqp_domain_name);
1496                 if (res > 0)
1497                         type = "home";
1498                 else if (res == 0)
1499                         type = "roaming";
1500                 else
1501                         type = "unknown";
1502                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1503                         MAC2STR(bss->bssid), type);
1504                 if (wpa_s->auto_select ||
1505                     (wpa_s->conf->auto_interworking &&
1506                      wpa_s->auto_network_select)) {
1507                         if (selected == NULL ||
1508                             cred->priority > selected_prio) {
1509                                 selected = bss;
1510                                 selected_prio = cred->priority;
1511                         }
1512                         if (res > 0 &&
1513                             (selected_home == NULL ||
1514                              cred->priority > selected_home_prio)) {
1515                                 selected_home = bss;
1516                                 selected_home_prio = cred->priority;
1517                         }
1518                 }
1519         }
1520
1521         if (selected_home && selected_home != selected &&
1522             selected_home_prio >= selected_prio) {
1523                 /* Prefer network operated by the Home SP */
1524                 selected = selected_home;
1525         }
1526
1527         if (count == 0) {
1528                 /*
1529                  * No matching network was found based on configured
1530                  * credentials. Check whether any of the enabled network blocks
1531                  * have matching APs.
1532                  */
1533                 if (interworking_find_network_match(wpa_s)) {
1534                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1535                                    "match for enabled network configurations");
1536                         if (wpa_s->auto_select)
1537                                 interworking_reconnect(wpa_s);
1538                         return;
1539                 }
1540
1541                 if (wpa_s->auto_network_select) {
1542                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1543                                    "scanning after ANQP fetch");
1544                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1545                                                 0);
1546                         return;
1547                 }
1548
1549                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1550                         "with matching credentials found");
1551         }
1552
1553         if (selected)
1554                 interworking_connect(wpa_s, selected);
1555 }
1556
1557
1558 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1559 {
1560         struct wpa_bss *bss;
1561         int found = 0;
1562         const u8 *ie;
1563
1564         if (!wpa_s->fetch_anqp_in_progress)
1565                 return;
1566
1567         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1568                 if (!(bss->caps & IEEE80211_CAP_ESS))
1569                         continue;
1570                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1571                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1572                         continue; /* AP does not support Interworking */
1573
1574                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1575                         found++;
1576                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1577                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1578                                 MACSTR, MAC2STR(bss->bssid));
1579                         interworking_anqp_send_req(wpa_s, bss);
1580                         break;
1581                 }
1582         }
1583
1584         if (found == 0) {
1585                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1586                 wpa_s->fetch_anqp_in_progress = 0;
1587                 if (wpa_s->network_select)
1588                         interworking_select_network(wpa_s);
1589         }
1590 }
1591
1592
1593 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1594 {
1595         struct wpa_bss *bss;
1596
1597         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1598                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1599
1600         wpa_s->fetch_anqp_in_progress = 1;
1601         interworking_next_anqp_fetch(wpa_s);
1602 }
1603
1604
1605 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1606 {
1607         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1608                 return 0;
1609
1610         wpa_s->network_select = 0;
1611         wpa_s->fetch_all_anqp = 1;
1612
1613         interworking_start_fetch_anqp(wpa_s);
1614
1615         return 0;
1616 }
1617
1618
1619 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1620 {
1621         if (!wpa_s->fetch_anqp_in_progress)
1622                 return;
1623
1624         wpa_s->fetch_anqp_in_progress = 0;
1625 }
1626
1627
1628 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1629                   u16 info_ids[], size_t num_ids)
1630 {
1631         struct wpabuf *buf;
1632         int ret = 0;
1633         int freq;
1634         struct wpa_bss *bss;
1635         int res;
1636
1637         freq = wpa_s->assoc_freq;
1638         bss = wpa_bss_get_bssid(wpa_s, dst);
1639         if (bss)
1640                 freq = bss->freq;
1641         if (freq <= 0)
1642                 return -1;
1643
1644         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1645                    MAC2STR(dst), (unsigned int) num_ids);
1646
1647         buf = anqp_build_req(info_ids, num_ids, NULL);
1648         if (buf == NULL)
1649                 return -1;
1650
1651         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1652         if (res < 0) {
1653                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1654                 ret = -1;
1655         } else
1656                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1657                            "%u", res);
1658
1659         wpabuf_free(buf);
1660         return ret;
1661 }
1662
1663
1664 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1665                                             const u8 *sa, u16 info_id,
1666                                             const u8 *data, size_t slen)
1667 {
1668         const u8 *pos = data;
1669         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1670 #ifdef CONFIG_HS20
1671         u8 type;
1672 #endif /* CONFIG_HS20 */
1673
1674         switch (info_id) {
1675         case ANQP_CAPABILITY_LIST:
1676                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1677                         " ANQP Capability list", MAC2STR(sa));
1678                 break;
1679         case ANQP_VENUE_NAME:
1680                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1681                         " Venue Name", MAC2STR(sa));
1682                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1683                 if (bss) {
1684                         wpabuf_free(bss->anqp_venue_name);
1685                         bss->anqp_venue_name = wpabuf_alloc_copy(pos, slen);
1686                 }
1687                 break;
1688         case ANQP_NETWORK_AUTH_TYPE:
1689                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1690                         " Network Authentication Type information",
1691                         MAC2STR(sa));
1692                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1693                                   "Type", pos, slen);
1694                 if (bss) {
1695                         wpabuf_free(bss->anqp_network_auth_type);
1696                         bss->anqp_network_auth_type =
1697                                 wpabuf_alloc_copy(pos, slen);
1698                 }
1699                 break;
1700         case ANQP_ROAMING_CONSORTIUM:
1701                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1702                         " Roaming Consortium list", MAC2STR(sa));
1703                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1704                                   pos, slen);
1705                 if (bss) {
1706                         wpabuf_free(bss->anqp_roaming_consortium);
1707                         bss->anqp_roaming_consortium =
1708                                 wpabuf_alloc_copy(pos, slen);
1709                 }
1710                 break;
1711         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1712                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1713                         " IP Address Type Availability information",
1714                         MAC2STR(sa));
1715                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1716                             pos, slen);
1717                 if (bss) {
1718                         wpabuf_free(bss->anqp_ip_addr_type_availability);
1719                         bss->anqp_ip_addr_type_availability =
1720                                 wpabuf_alloc_copy(pos, slen);
1721                 }
1722                 break;
1723         case ANQP_NAI_REALM:
1724                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1725                         " NAI Realm list", MAC2STR(sa));
1726                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1727                 if (bss) {
1728                         wpabuf_free(bss->anqp_nai_realm);
1729                         bss->anqp_nai_realm = wpabuf_alloc_copy(pos, slen);
1730                 }
1731                 break;
1732         case ANQP_3GPP_CELLULAR_NETWORK:
1733                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1734                         " 3GPP Cellular Network information", MAC2STR(sa));
1735                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1736                                   pos, slen);
1737                 if (bss) {
1738                         wpabuf_free(bss->anqp_3gpp);
1739                         bss->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1740                 }
1741                 break;
1742         case ANQP_DOMAIN_NAME:
1743                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1744                         " Domain Name list", MAC2STR(sa));
1745                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1746                 if (bss) {
1747                         wpabuf_free(bss->anqp_domain_name);
1748                         bss->anqp_domain_name = wpabuf_alloc_copy(pos, slen);
1749                 }
1750                 break;
1751         case ANQP_VENDOR_SPECIFIC:
1752                 if (slen < 3)
1753                         return;
1754
1755                 switch (WPA_GET_BE24(pos)) {
1756 #ifdef CONFIG_HS20
1757                 case OUI_WFA:
1758                         pos += 3;
1759                         slen -= 3;
1760
1761                         if (slen < 1)
1762                                 return;
1763                         type = *pos++;
1764                         slen--;
1765
1766                         switch (type) {
1767                         case HS20_ANQP_OUI_TYPE:
1768                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1769                                                              slen);
1770                                 break;
1771                         default:
1772                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1773                                            "vendor type %u", type);
1774                                 break;
1775                         }
1776                         break;
1777 #endif /* CONFIG_HS20 */
1778                 default:
1779                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1780                                    "vendor-specific ANQP OUI %06x",
1781                                    WPA_GET_BE24(pos));
1782                         return;
1783                 }
1784                 break;
1785         default:
1786                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1787                            "%u", info_id);
1788                 break;
1789         }
1790 }
1791
1792
1793 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1794                   enum gas_query_result result,
1795                   const struct wpabuf *adv_proto,
1796                   const struct wpabuf *resp, u16 status_code)
1797 {
1798         struct wpa_supplicant *wpa_s = ctx;
1799         const u8 *pos;
1800         const u8 *end;
1801         u16 info_id;
1802         u16 slen;
1803
1804         if (result != GAS_QUERY_SUCCESS)
1805                 return;
1806
1807         pos = wpabuf_head(adv_proto);
1808         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1809             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1810                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1811                            "Protocol in response");
1812                 return;
1813         }
1814
1815         pos = wpabuf_head(resp);
1816         end = pos + wpabuf_len(resp);
1817
1818         while (pos < end) {
1819                 if (pos + 4 > end) {
1820                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1821                         break;
1822                 }
1823                 info_id = WPA_GET_LE16(pos);
1824                 pos += 2;
1825                 slen = WPA_GET_LE16(pos);
1826                 pos += 2;
1827                 if (pos + slen > end) {
1828                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1829                                    "for Info ID %u", info_id);
1830                         break;
1831                 }
1832                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1833                                                 slen);
1834                 pos += slen;
1835         }
1836 }
1837
1838
1839 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1840                                           struct wpa_scan_results *scan_res)
1841 {
1842         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1843                    "ANQP fetch");
1844         interworking_start_fetch_anqp(wpa_s);
1845 }
1846
1847
1848 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1849 {
1850         interworking_stop_fetch_anqp(wpa_s);
1851         wpa_s->network_select = 1;
1852         wpa_s->auto_network_select = 0;
1853         wpa_s->auto_select = !!auto_select;
1854         wpa_s->fetch_all_anqp = 0;
1855         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
1856                    "selection");
1857         wpa_s->scan_res_handler = interworking_scan_res_handler;
1858         wpa_s->scan_req = 2;
1859         wpa_supplicant_req_scan(wpa_s, 0, 0);
1860
1861         return 0;
1862 }
1863
1864
1865 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
1866                         enum gas_query_result result,
1867                         const struct wpabuf *adv_proto,
1868                         const struct wpabuf *resp, u16 status_code)
1869 {
1870         struct wpa_supplicant *wpa_s = ctx;
1871
1872         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
1873                 " dialog_token=%d status_code=%d resp_len=%d",
1874                 MAC2STR(addr), dialog_token, status_code,
1875                 resp ? (int) wpabuf_len(resp) : -1);
1876         if (!resp)
1877                 return;
1878
1879         wpabuf_free(wpa_s->last_gas_resp);
1880         wpa_s->last_gas_resp = wpabuf_dup(resp);
1881         if (wpa_s->last_gas_resp == NULL)
1882                 return;
1883         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
1884         wpa_s->last_gas_dialog_token = dialog_token;
1885 }
1886
1887
1888 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
1889                      const struct wpabuf *adv_proto,
1890                      const struct wpabuf *query)
1891 {
1892         struct wpabuf *buf;
1893         int ret = 0;
1894         int freq;
1895         struct wpa_bss *bss;
1896         int res;
1897         size_t len;
1898         u8 query_resp_len_limit = 0, pame_bi = 0;
1899
1900         freq = wpa_s->assoc_freq;
1901         bss = wpa_bss_get_bssid(wpa_s, dst);
1902         if (bss)
1903                 freq = bss->freq;
1904         if (freq <= 0)
1905                 return -1;
1906
1907         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
1908                    MAC2STR(dst), freq);
1909         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
1910         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
1911
1912         len = 3 + wpabuf_len(adv_proto) + 2;
1913         if (query)
1914                 len += wpabuf_len(query);
1915         buf = gas_build_initial_req(0, len);
1916         if (buf == NULL)
1917                 return -1;
1918
1919         /* Advertisement Protocol IE */
1920         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
1921         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
1922         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
1923                       (pame_bi ? 0x80 : 0));
1924         wpabuf_put_buf(buf, adv_proto);
1925
1926         /* GAS Query */
1927         if (query) {
1928                 wpabuf_put_le16(buf, wpabuf_len(query));
1929                 wpabuf_put_buf(buf, query);
1930         } else
1931                 wpabuf_put_le16(buf, 0);
1932
1933         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
1934         if (res < 0) {
1935                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
1936                 ret = -1;
1937         } else
1938                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
1939                            "%u", res);
1940
1941         wpabuf_free(buf);
1942         return ret;
1943 }