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         int eap_type;
 740         int res;
 741         char prefix;
 742
 743         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 744                 return -1;
 745
 746         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 747                 char *sep;
 748                 const char *imsi;
 749                 int mnc_len;
 750
 751 #ifdef PCSC_FUNCS
 752                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
 753                     wpa_s->imsi[0]) {
 754                         imsi = wpa_s->imsi;
 755                         mnc_len = wpa_s->mnc_len;
 756                         goto compare;
 757                 }
 758 #endif /* PCSC_FUNCS */
 759
 760                 if (cred->imsi == NULL || !cred->imsi[0] ||
 761                     cred->milenage == NULL || !cred->milenage[0])
 762                         continue;
 763
 764                 sep = os_strchr(cred->imsi, '-');
 765                 if (sep == NULL ||
 766                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
 767                         continue;
 768                 mnc_len = sep - cred->imsi - 3;
 769                 imsi = cred->imsi;
 770
 771 #ifdef PCSC_FUNCS
 772         compare:
 773 #endif /* PCSC_FUNCS */
 774                 if (plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len))
 775                         break;
 776         }
 777         if (cred == NULL)
 778                 return -1;
 779
 780         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 781         if (ie == NULL)
 782                 return -1;
 783         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 784                    MAC2STR(bss->bssid));
 785
 786         ssid = wpa_config_add_network(wpa_s->conf);
 787         if (ssid == NULL)
 788                 return -1;
 789
 790         wpas_notify_network_added(wpa_s, ssid);
 791         wpa_config_set_network_defaults(ssid);
 792         ssid->priority = cred->priority;
 793         ssid->temporary = 1;
 794         ssid->ssid = os_zalloc(ie[1] + 1);
 795         if (ssid->ssid == NULL)
 796                 goto fail;
 797         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 798         ssid->ssid_len = ie[1];
 799
 800         if (interworking_set_hs20_params(ssid) < 0)
 801                 goto fail;
 802
 803         eap_type = EAP_TYPE_SIM;
 804         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 805                 eap_type = EAP_TYPE_AKA;
 806         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
 807                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
 808                     cred->eap_method[0].method == EAP_TYPE_AKA ||
 809                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
 810                         eap_type = cred->eap_method[0].method;
 811         }
 812
 813         switch (eap_type) {
 814         case EAP_TYPE_SIM:
 815                 prefix = '1';
 816                 res = wpa_config_set(ssid, "eap", "SIM", 0);
 817                 break;
 818         case EAP_TYPE_AKA:
 819                 prefix = '0';
 820                 res = wpa_config_set(ssid, "eap", "AKA", 0);
 821                 break;
 822         case EAP_TYPE_AKA_PRIME:
 823                 prefix = '6';
 824                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
 825                 break;
 826         default:
 827                 res = -1;
 828                 break;
 829         }
 830         if (res < 0) {
 831                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
 832                            eap_type);
 833                 goto fail;
 834         }
 835
 836         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
 837                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 838                 goto fail;
 839         }
 840
 841         if (cred->milenage && cred->milenage[0]) {
 842                 if (wpa_config_set_quoted(ssid, "password",
 843                                           cred->milenage) < 0)
 844                         goto fail;
 845         } else if (cred->pcsc) {
 846                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 847                         goto fail;
 848                 if (wpa_s->conf->pcsc_pin &&
 849                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 850                     < 0)
 851                         goto fail;
 852         }
 853
 854         if (cred->password && cred->password[0] &&
 855             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 856                 goto fail;
 857
 858         wpa_config_update_prio_list(wpa_s->conf);
 859         interworking_reconnect(wpa_s);
 860
 861         return 0;
 862
 863 fail:
 864         wpas_notify_network_removed(wpa_s, ssid);
 865         wpa_config_remove_network(wpa_s->conf, ssid->id);
 866 #endif /* INTERWORKING_3GPP */
 867         return -1;
 868 }
 869
 870
 871 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 872                                             size_t rc_len)
 873 {
 874         const u8 *pos, *end;
 875         u8 lens;
 876
 877         if (ie == NULL)
 878                 return 0;
 879
 880         pos = ie + 2;
 881         end = ie + 2 + ie[1];
 882
 883         /* Roaming Consortium element:
 884          * Number of ANQP OIs
 885          * OI #1 and #2 lengths
 886          * OI #1, [OI #2], [OI #3]
 887          */
 888
 889         if (pos + 2 > end)
 890                 return 0;
 891
 892         pos++; /* skip Number of ANQP OIs */
 893         lens = *pos++;
 894         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 895                 return 0;
 896
 897         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 898                 return 1;
 899         pos += lens & 0x0f;
 900
 901         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 902                 return 1;
 903         pos += lens >> 4;
 904
 905         if (pos < end && (size_t) (end - pos) == rc_len &&
 906             os_memcmp(pos, rc_id, rc_len) == 0)
 907                 return 1;
 908
 909         return 0;
 910 }
 911
 912
 913 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 914                                          const u8 *rc_id, size_t rc_len)
 915 {
 916         const u8 *pos, *end;
 917         u8 len;
 918
 919         if (anqp == NULL)
 920                 return 0;
 921
 922         pos = wpabuf_head(anqp);
 923         end = pos + wpabuf_len(anqp);
 924
 925         /* Set of <OI Length, OI> duples */
 926         while (pos < end) {
 927                 len = *pos++;
 928                 if (pos + len > end)
 929                         break;
 930                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 931                         return 1;
 932                 pos += len;
 933         }
 934
 935         return 0;
 936 }
 937
 938
 939 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
 940                                     const u8 *rc_id, size_t rc_len)
 941 {
 942         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
 943                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
 944 }
 945
 946
 947 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 948         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 949 {
 950         struct wpa_cred *cred, *selected = NULL;
 951         const u8 *ie;
 952
 953         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 954
 955         if (ie == NULL &&
 956             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 957                 return NULL;
 958
 959         if (wpa_s->conf->cred == NULL)
 960                 return NULL;
 961
 962         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 963                 if (cred->roaming_consortium_len == 0)
 964                         continue;
 965
 966                 if (!roaming_consortium_match(ie,
 967                                               bss->anqp ?
 968                                               bss->anqp->roaming_consortium :
 969                                               NULL,
 970                                               cred->roaming_consortium,
 971                                               cred->roaming_consortium_len))
 972                         continue;
 973
 974                 if (selected == NULL ||
 975                     selected->priority < cred->priority)
 976                         selected = cred;
 977         }
 978
 979         return selected;
 980 }
 981
 982
 983 static int interworking_set_eap_params(struct wpa_ssid *ssid,
 984                                        struct wpa_cred *cred, int ttls)
 985 {
 986         if (cred->eap_method) {
 987                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
 988                         cred->eap_method->method == EAP_TYPE_TTLS;
 989
 990                 os_free(ssid->eap.eap_methods);
 991                 ssid->eap.eap_methods =
 992                         os_malloc(sizeof(struct eap_method_type) * 2);
 993                 if (ssid->eap.eap_methods == NULL)
 994                         return -1;
 995                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
 996                           sizeof(*cred->eap_method));
 997                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
 998                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
 999         }
1000
1001         if (ttls && cred->username && cred->username[0]) {
1002                 const char *pos;
1003                 char *anon;
1004                 /* Use anonymous NAI in Phase 1 */
1005                 pos = os_strchr(cred->username, '@');
1006                 if (pos) {
1007                         size_t buflen = 9 + os_strlen(pos) + 1;
1008                         anon = os_malloc(buflen);
1009                         if (anon == NULL)
1010                                 return -1;
1011                         os_snprintf(anon, buflen, "anonymous%s", pos);
1012                 } else if (cred->realm) {
1013                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1014                         anon = os_malloc(buflen);
1015                         if (anon == NULL)
1016                                 return -1;
1017                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1018                 } else {
1019                         anon = os_strdup("anonymous");
1020                         if (anon == NULL)
1021                                 return -1;
1022                 }
1023                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1024                     0) {
1025                         os_free(anon);
1026                         return -1;
1027                 }
1028                 os_free(anon);
1029         }
1030
1031         if (cred->username && cred->username[0] &&
1032             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1033                 return -1;
1034
1035         if (cred->password && cred->password[0]) {
1036                 if (cred->ext_password &&
1037                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1038                         return -1;
1039                 if (!cred->ext_password &&
1040                     wpa_config_set_quoted(ssid, "password", cred->password) <
1041                     0)
1042                         return -1;
1043         }
1044
1045         if (cred->client_cert && cred->client_cert[0] &&
1046             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1047                 return -1;
1048
1049 #ifdef ANDROID
1050         if (cred->private_key &&
1051             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1052                 /* Use OpenSSL engine configuration for Android keystore */
1053                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1054                     wpa_config_set_quoted(ssid, "key_id",
1055                                           cred->private_key + 11) < 0 ||
1056                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1057                         return -1;
1058         } else
1059 #endif /* ANDROID */
1060         if (cred->private_key && cred->private_key[0] &&
1061             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1062                 return -1;
1063
1064         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1065             wpa_config_set_quoted(ssid, "private_key_passwd",
1066                                   cred->private_key_passwd) < 0)
1067                 return -1;
1068
1069         if (cred->phase1) {
1070                 os_free(ssid->eap.phase1);
1071                 ssid->eap.phase1 = os_strdup(cred->phase1);
1072         }
1073         if (cred->phase2) {
1074                 os_free(ssid->eap.phase2);
1075                 ssid->eap.phase2 = os_strdup(cred->phase2);
1076         }
1077
1078         if (cred->ca_cert && cred->ca_cert[0] &&
1079             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1080                 return -1;
1081
1082         return 0;
1083 }
1084
1085
1086 static int interworking_connect_roaming_consortium(
1087         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1088         struct wpa_bss *bss, const u8 *ssid_ie)
1089 {
1090         struct wpa_ssid *ssid;
1091
1092         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1093                    "roaming consortium match", MAC2STR(bss->bssid));
1094
1095         ssid = wpa_config_add_network(wpa_s->conf);
1096         if (ssid == NULL)
1097                 return -1;
1098         wpas_notify_network_added(wpa_s, ssid);
1099         wpa_config_set_network_defaults(ssid);
1100         ssid->priority = cred->priority;
1101         ssid->temporary = 1;
1102         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1103         if (ssid->ssid == NULL)
1104                 goto fail;
1105         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1106         ssid->ssid_len = ssid_ie[1];
1107
1108         if (interworking_set_hs20_params(ssid) < 0)
1109                 goto fail;
1110
1111         if (cred->eap_method == NULL) {
1112                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1113                            "credential using roaming consortium");
1114                 goto fail;
1115         }
1116
1117         if (interworking_set_eap_params(
1118                     ssid, cred,
1119                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1120                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1121                 goto fail;
1122
1123         wpa_config_update_prio_list(wpa_s->conf);
1124         interworking_reconnect(wpa_s);
1125
1126         return 0;
1127
1128 fail:
1129         wpas_notify_network_removed(wpa_s, ssid);
1130         wpa_config_remove_network(wpa_s->conf, ssid->id);
1131         return -1;
1132 }
1133
1134
1135 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1136 {
1137         struct wpa_cred *cred;
1138         struct wpa_ssid *ssid;
1139         struct nai_realm *realm;
1140         struct nai_realm_eap *eap = NULL;
1141         u16 count, i;
1142         char buf[100];
1143         const u8 *ie;
1144
1145         if (wpa_s->conf->cred == NULL || bss == NULL)
1146                 return -1;
1147         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1148         if (ie == NULL || ie[1] == 0) {
1149                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1150                            MACSTR, MAC2STR(bss->bssid));
1151                 return -1;
1152         }
1153
1154         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1155                 /*
1156                  * We currently support only HS 2.0 networks and those are
1157                  * required to use WPA2-Enterprise.
1158                  */
1159                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1160                            "RSN");
1161                 return -1;
1162         }
1163
1164         cred = interworking_credentials_available_roaming_consortium(wpa_s,
1165                                                                      bss);
1166         if (cred)
1167                 return interworking_connect_roaming_consortium(wpa_s, cred,
1168                                                                bss, ie);
1169
1170         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1171                                 &count);
1172         if (realm == NULL) {
1173                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1174                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1175                 count = 0;
1176         }
1177
1178         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1179                 for (i = 0; i < count; i++) {
1180                         if (!nai_realm_match(&realm[i], cred->realm))
1181                                 continue;
1182                         eap = nai_realm_find_eap(cred, &realm[i]);
1183                         if (eap)
1184                                 break;
1185                 }
1186                 if (eap)
1187                         break;
1188         }
1189
1190         if (!eap) {
1191                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
1192                         if (realm)
1193                                 nai_realm_free(realm, count);
1194                         return 0;
1195                 }
1196
1197                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1198                            "and EAP method found for " MACSTR,
1199                            MAC2STR(bss->bssid));
1200                 nai_realm_free(realm, count);
1201                 return -1;
1202         }
1203
1204         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1205                    MAC2STR(bss->bssid));
1206
1207         ssid = wpa_config_add_network(wpa_s->conf);
1208         if (ssid == NULL) {
1209                 nai_realm_free(realm, count);
1210                 return -1;
1211         }
1212         wpas_notify_network_added(wpa_s, ssid);
1213         wpa_config_set_network_defaults(ssid);
1214         ssid->priority = cred->priority;
1215         ssid->temporary = 1;
1216         ssid->ssid = os_zalloc(ie[1] + 1);
1217         if (ssid->ssid == NULL)
1218                 goto fail;
1219         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1220         ssid->ssid_len = ie[1];
1221
1222         if (interworking_set_hs20_params(ssid) < 0)
1223                 goto fail;
1224
1225         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1226                                                      eap->method), 0) < 0)
1227                 goto fail;
1228
1229         switch (eap->method) {
1230         case EAP_TYPE_TTLS:
1231                 if (eap->inner_method) {
1232                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1233                                     eap_get_name(EAP_VENDOR_IETF,
1234                                                  eap->inner_method));
1235                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1236                                 goto fail;
1237                         break;
1238                 }
1239                 switch (eap->inner_non_eap) {
1240                 case NAI_REALM_INNER_NON_EAP_PAP:
1241                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1242                             0)
1243                                 goto fail;
1244                         break;
1245                 case NAI_REALM_INNER_NON_EAP_CHAP:
1246                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1247                             < 0)
1248                                 goto fail;
1249                         break;
1250                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1251                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1252                                            0) < 0)
1253                                 goto fail;
1254                         break;
1255                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1256                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1257                                            0) < 0)
1258                                 goto fail;
1259                         break;
1260                 }
1261                 break;
1262         case EAP_TYPE_PEAP:
1263                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1264                             eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
1265                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1266                         goto fail;
1267                 break;
1268         case EAP_TYPE_TLS:
1269                 break;
1270         }
1271
1272         if (interworking_set_eap_params(ssid, cred,
1273                                         eap->method == EAP_TYPE_TTLS) < 0)
1274                 goto fail;
1275
1276         nai_realm_free(realm, count);
1277
1278         wpa_config_update_prio_list(wpa_s->conf);
1279         interworking_reconnect(wpa_s);
1280
1281         return 0;
1282
1283 fail:
1284         wpas_notify_network_removed(wpa_s, ssid);
1285         wpa_config_remove_network(wpa_s->conf, ssid->id);
1286         nai_realm_free(realm, count);
1287         return -1;
1288 }
1289
1290
1291 static struct wpa_cred * interworking_credentials_available_3gpp(
1292         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1293 {
1294         struct wpa_cred *cred, *selected = NULL;
1295         int ret;
1296
1297 #ifdef INTERWORKING_3GPP
1298         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1299                 return NULL;
1300
1301         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1302                 char *sep;
1303                 const char *imsi;
1304                 int mnc_len;
1305
1306 #ifdef PCSC_FUNCS
1307                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1308                     wpa_s->imsi[0]) {
1309                         imsi = wpa_s->imsi;
1310                         mnc_len = wpa_s->mnc_len;
1311                         goto compare;
1312                 }
1313 #endif /* PCSC_FUNCS */
1314
1315                 if (cred->imsi == NULL || !cred->imsi[0] ||
1316                     cred->milenage == NULL || !cred->milenage[0])
1317                         continue;
1318
1319                 sep = os_strchr(cred->imsi, '-');
1320                 if (sep == NULL ||
1321                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1322                         continue;
1323                 mnc_len = sep - cred->imsi - 3;
1324                 imsi = cred->imsi;
1325
1326 #ifdef PCSC_FUNCS
1327         compare:
1328 #endif /* PCSC_FUNCS */
1329                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1330                            MACSTR, MAC2STR(bss->bssid));
1331                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1332                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1333                 if (ret) {
1334                         if (selected == NULL ||
1335                             selected->priority < cred->priority)
1336                                 selected = cred;
1337                 }
1338         }
1339 #endif /* INTERWORKING_3GPP */
1340         return selected;
1341 }
1342
1343
1344 static struct wpa_cred * interworking_credentials_available_realm(
1345         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1346 {
1347         struct wpa_cred *cred, *selected = NULL;
1348         struct nai_realm *realm;
1349         u16 count, i;
1350
1351         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1352                 return NULL;
1353
1354         if (wpa_s->conf->cred == NULL)
1355                 return NULL;
1356
1357         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1358                    MACSTR, MAC2STR(bss->bssid));
1359         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1360         if (realm == NULL) {
1361                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1362                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1363                 return NULL;
1364         }
1365
1366         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1367                 if (cred->realm == NULL)
1368                         continue;
1369
1370                 for (i = 0; i < count; i++) {
1371                         if (!nai_realm_match(&realm[i], cred->realm))
1372                                 continue;
1373                         if (nai_realm_find_eap(cred, &realm[i])) {
1374                                 if (selected == NULL ||
1375                                     selected->priority < cred->priority)
1376                                         selected = cred;
1377                                 break;
1378                         }
1379                 }
1380         }
1381
1382         nai_realm_free(realm, count);
1383
1384         return selected;
1385 }
1386
1387
1388 static struct wpa_cred * interworking_credentials_available(
1389         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1390 {
1391         struct wpa_cred *cred, *cred2;
1392
1393         cred = interworking_credentials_available_realm(wpa_s, bss);
1394         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1395         if (cred && cred2 && cred2->priority >= cred->priority)
1396                 cred = cred2;
1397         if (!cred)
1398                 cred = cred2;
1399
1400         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1401                                                                       bss);
1402         if (cred && cred2 && cred2->priority >= cred->priority)
1403                 cred = cred2;
1404         if (!cred)
1405                 cred = cred2;
1406
1407         return cred;
1408 }
1409
1410
1411 static int domain_name_list_contains(struct wpabuf *domain_names,
1412                                      const char *domain)
1413 {
1414         const u8 *pos, *end;
1415         size_t len;
1416
1417         len = os_strlen(domain);
1418         pos = wpabuf_head(domain_names);
1419         end = pos + wpabuf_len(domain_names);
1420
1421         while (pos + 1 < end) {
1422                 if (pos + 1 + pos[0] > end)
1423                         break;
1424
1425                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1426                                   pos + 1, pos[0]);
1427                 if (pos[0] == len &&
1428                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1429                         return 1;
1430
1431                 pos += 1 + pos[0];
1432         }
1433
1434         return 0;
1435 }
1436
1437
1438 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1439                                 struct wpabuf *domain_names)
1440 {
1441         struct wpa_cred *cred;
1442 #ifdef INTERWORKING_3GPP
1443         char nai[100], *realm;
1444 #endif /* INTERWORKING_3GPP */
1445
1446         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1447                 return -1;
1448
1449         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1450 #ifdef INTERWORKING_3GPP
1451                 char *imsi = NULL;
1452                 int mnc_len = 0;
1453                 if (cred->imsi)
1454                         imsi = cred->imsi;
1455 #ifdef CONFIG_PCSC
1456                 else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1457                          wpa_s->scard && wpa_s->imsi[0]) {
1458                         imsi = wpa_s->imsi;
1459                         mnc_len = wpa_s->mnc_len;
1460                 }
1461 #endif /* CONFIG_PCSC */
1462                 if (imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0)
1463                     == 0) {
1464                         realm = os_strchr(nai, '@');
1465                         if (realm)
1466                                 realm++;
1467                         wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1468                                    "with SIM/USIM domain %s", realm);
1469                         if (realm &&
1470                             domain_name_list_contains(domain_names, realm))
1471                                 return 1;
1472                 }
1473 #endif /* INTERWORKING_3GPP */
1474
1475                 if (cred->domain == NULL)
1476                         continue;
1477
1478                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1479                            "home SP FQDN %s", cred->domain);
1480                 if (domain_name_list_contains(domain_names, cred->domain))
1481                         return 1;
1482         }
1483
1484         return 0;
1485 }
1486
1487
1488 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1489 {
1490         struct wpa_bss *bss;
1491         struct wpa_ssid *ssid;
1492
1493         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1494                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1495                         if (wpas_network_disabled(wpa_s, ssid) ||
1496                             ssid->mode != WPAS_MODE_INFRA)
1497                                 continue;
1498                         if (ssid->ssid_len != bss->ssid_len ||
1499                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1500                             0)
1501                                 continue;
1502                         /*
1503                          * TODO: Consider more accurate matching of security
1504                          * configuration similarly to what is done in events.c
1505                          */
1506                         return 1;
1507                 }
1508         }
1509
1510         return 0;
1511 }
1512
1513
1514 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1515 {
1516         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1517         int selected_prio = -999999, selected_home_prio = -999999;
1518         unsigned int count = 0;
1519         const char *type;
1520         int res;
1521         struct wpa_cred *cred;
1522
1523         wpa_s->network_select = 0;
1524
1525         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1526                 cred = interworking_credentials_available(wpa_s, bss);
1527                 if (!cred)
1528                         continue;
1529                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1530                         /*
1531                          * We currently support only HS 2.0 networks and those
1532                          * are required to use WPA2-Enterprise.
1533                          */
1534                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1535                                    "with " MACSTR " but network does not use "
1536                                    "RSN", MAC2STR(bss->bssid));
1537                         continue;
1538                 }
1539                 count++;
1540                 res = interworking_home_sp(wpa_s, bss->anqp ?
1541                                            bss->anqp->domain_name : NULL);
1542                 if (res > 0)
1543                         type = "home";
1544                 else if (res == 0)
1545                         type = "roaming";
1546                 else
1547                         type = "unknown";
1548                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1549                         MAC2STR(bss->bssid), type);
1550                 if (wpa_s->auto_select ||
1551                     (wpa_s->conf->auto_interworking &&
1552                      wpa_s->auto_network_select)) {
1553                         if (selected == NULL ||
1554                             cred->priority > selected_prio) {
1555                                 selected = bss;
1556                                 selected_prio = cred->priority;
1557                         }
1558                         if (res > 0 &&
1559                             (selected_home == NULL ||
1560                              cred->priority > selected_home_prio)) {
1561                                 selected_home = bss;
1562                                 selected_home_prio = cred->priority;
1563                         }
1564                 }
1565         }
1566
1567         if (selected_home && selected_home != selected &&
1568             selected_home_prio >= selected_prio) {
1569                 /* Prefer network operated by the Home SP */
1570                 selected = selected_home;
1571         }
1572
1573         if (count == 0) {
1574                 /*
1575                  * No matching network was found based on configured
1576                  * credentials. Check whether any of the enabled network blocks
1577                  * have matching APs.
1578                  */
1579                 if (interworking_find_network_match(wpa_s)) {
1580                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1581                                    "match for enabled network configurations");
1582                         if (wpa_s->auto_select)
1583                                 interworking_reconnect(wpa_s);
1584                         return;
1585                 }
1586
1587                 if (wpa_s->auto_network_select) {
1588                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1589                                    "scanning after ANQP fetch");
1590                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1591                                                 0);
1592                         return;
1593                 }
1594
1595                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1596                         "with matching credentials found");
1597         }
1598
1599         if (selected)
1600                 interworking_connect(wpa_s, selected);
1601 }
1602
1603
1604 static struct wpa_bss_anqp *
1605 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1606 {
1607         struct wpa_bss *other;
1608
1609         if (is_zero_ether_addr(bss->hessid))
1610                 return NULL; /* Cannot be in the same homegenous ESS */
1611
1612         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1613                 if (other == bss)
1614                         continue;
1615                 if (other->anqp == NULL)
1616                         continue;
1617                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1618                         continue;
1619                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1620                         continue;
1621                 if (bss->ssid_len != other->ssid_len ||
1622                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1623                         continue;
1624
1625                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1626                            "already fetched BSSID " MACSTR " and " MACSTR,
1627                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1628                 other->anqp->users++;
1629                 return other->anqp;
1630         }
1631
1632         return NULL;
1633 }
1634
1635
1636 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1637 {
1638         struct wpa_bss *bss;
1639         int found = 0;
1640         const u8 *ie;
1641
1642         if (!wpa_s->fetch_anqp_in_progress)
1643                 return;
1644
1645         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1646                 if (!(bss->caps & IEEE80211_CAP_ESS))
1647                         continue;
1648                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1649                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1650                         continue; /* AP does not support Interworking */
1651
1652                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1653                         if (bss->anqp == NULL) {
1654                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1655                                                                          bss);
1656                                 if (bss->anqp) {
1657                                         /* Shared data already fetched */
1658                                         continue;
1659                                 }
1660                                 bss->anqp = wpa_bss_anqp_alloc();
1661                                 if (bss->anqp == NULL)
1662                                         break;
1663                         }
1664                         found++;
1665                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1666                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1667                                 MACSTR, MAC2STR(bss->bssid));
1668                         interworking_anqp_send_req(wpa_s, bss);
1669                         break;
1670                 }
1671         }
1672
1673         if (found == 0) {
1674                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1675                 wpa_s->fetch_anqp_in_progress = 0;
1676                 if (wpa_s->network_select)
1677                         interworking_select_network(wpa_s);
1678         }
1679 }
1680
1681
1682 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1683 {
1684         struct wpa_bss *bss;
1685
1686         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1687                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1688
1689         wpa_s->fetch_anqp_in_progress = 1;
1690         interworking_next_anqp_fetch(wpa_s);
1691 }
1692
1693
1694 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1695 {
1696         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1697                 return 0;
1698
1699         wpa_s->network_select = 0;
1700         wpa_s->fetch_all_anqp = 1;
1701
1702         interworking_start_fetch_anqp(wpa_s);
1703
1704         return 0;
1705 }
1706
1707
1708 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1709 {
1710         if (!wpa_s->fetch_anqp_in_progress)
1711                 return;
1712
1713         wpa_s->fetch_anqp_in_progress = 0;
1714 }
1715
1716
1717 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1718                   u16 info_ids[], size_t num_ids)
1719 {
1720         struct wpabuf *buf;
1721         int ret = 0;
1722         int freq;
1723         struct wpa_bss *bss;
1724         int res;
1725
1726         freq = wpa_s->assoc_freq;
1727         bss = wpa_bss_get_bssid(wpa_s, dst);
1728         if (bss) {
1729                 wpa_bss_anqp_unshare_alloc(bss);
1730                 freq = bss->freq;
1731         }
1732         if (freq <= 0)
1733                 return -1;
1734
1735         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1736                    MAC2STR(dst), (unsigned int) num_ids);
1737
1738         buf = anqp_build_req(info_ids, num_ids, NULL);
1739         if (buf == NULL)
1740                 return -1;
1741
1742         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1743         if (res < 0) {
1744                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1745                 ret = -1;
1746         } else
1747                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1748                            "%u", res);
1749
1750         wpabuf_free(buf);
1751         return ret;
1752 }
1753
1754
1755 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1756                                             const u8 *sa, u16 info_id,
1757                                             const u8 *data, size_t slen)
1758 {
1759         const u8 *pos = data;
1760         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1761         struct wpa_bss_anqp *anqp = NULL;
1762 #ifdef CONFIG_HS20
1763         u8 type;
1764 #endif /* CONFIG_HS20 */
1765
1766         if (bss)
1767                 anqp = bss->anqp;
1768
1769         switch (info_id) {
1770         case ANQP_CAPABILITY_LIST:
1771                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1772                         " ANQP Capability list", MAC2STR(sa));
1773                 break;
1774         case ANQP_VENUE_NAME:
1775                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1776                         " Venue Name", MAC2STR(sa));
1777                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1778                 if (anqp) {
1779                         wpabuf_free(anqp->venue_name);
1780                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1781                 }
1782                 break;
1783         case ANQP_NETWORK_AUTH_TYPE:
1784                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1785                         " Network Authentication Type information",
1786                         MAC2STR(sa));
1787                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1788                                   "Type", pos, slen);
1789                 if (anqp) {
1790                         wpabuf_free(anqp->network_auth_type);
1791                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1792                 }
1793                 break;
1794         case ANQP_ROAMING_CONSORTIUM:
1795                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1796                         " Roaming Consortium list", MAC2STR(sa));
1797                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1798                                   pos, slen);
1799                 if (anqp) {
1800                         wpabuf_free(anqp->roaming_consortium);
1801                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1802                 }
1803                 break;
1804         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1805                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1806                         " IP Address Type Availability information",
1807                         MAC2STR(sa));
1808                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1809                             pos, slen);
1810                 if (anqp) {
1811                         wpabuf_free(anqp->ip_addr_type_availability);
1812                         anqp->ip_addr_type_availability =
1813                                 wpabuf_alloc_copy(pos, slen);
1814                 }
1815                 break;
1816         case ANQP_NAI_REALM:
1817                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1818                         " NAI Realm list", MAC2STR(sa));
1819                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1820                 if (anqp) {
1821                         wpabuf_free(anqp->nai_realm);
1822                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1823                 }
1824                 break;
1825         case ANQP_3GPP_CELLULAR_NETWORK:
1826                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1827                         " 3GPP Cellular Network information", MAC2STR(sa));
1828                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1829                                   pos, slen);
1830                 if (anqp) {
1831                         wpabuf_free(anqp->anqp_3gpp);
1832                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1833                 }
1834                 break;
1835         case ANQP_DOMAIN_NAME:
1836                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1837                         " Domain Name list", MAC2STR(sa));
1838                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1839                 if (anqp) {
1840                         wpabuf_free(anqp->domain_name);
1841                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1842                 }
1843                 break;
1844         case ANQP_VENDOR_SPECIFIC:
1845                 if (slen < 3)
1846                         return;
1847
1848                 switch (WPA_GET_BE24(pos)) {
1849 #ifdef CONFIG_HS20
1850                 case OUI_WFA:
1851                         pos += 3;
1852                         slen -= 3;
1853
1854                         if (slen < 1)
1855                                 return;
1856                         type = *pos++;
1857                         slen--;
1858
1859                         switch (type) {
1860                         case HS20_ANQP_OUI_TYPE:
1861                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1862                                                              slen);
1863                                 break;
1864                         default:
1865                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1866                                            "vendor type %u", type);
1867                                 break;
1868                         }
1869                         break;
1870 #endif /* CONFIG_HS20 */
1871                 default:
1872                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1873                                    "vendor-specific ANQP OUI %06x",
1874                                    WPA_GET_BE24(pos));
1875                         return;
1876                 }
1877                 break;
1878         default:
1879                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1880                            "%u", info_id);
1881                 break;
1882         }
1883 }
1884
1885
1886 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1887                   enum gas_query_result result,
1888                   const struct wpabuf *adv_proto,
1889                   const struct wpabuf *resp, u16 status_code)
1890 {
1891         struct wpa_supplicant *wpa_s = ctx;
1892         const u8 *pos;
1893         const u8 *end;
1894         u16 info_id;
1895         u16 slen;
1896
1897         if (result != GAS_QUERY_SUCCESS)
1898                 return;
1899
1900         pos = wpabuf_head(adv_proto);
1901         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1902             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1903                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1904                            "Protocol in response");
1905                 return;
1906         }
1907
1908         pos = wpabuf_head(resp);
1909         end = pos + wpabuf_len(resp);
1910
1911         while (pos < end) {
1912                 if (pos + 4 > end) {
1913                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1914                         break;
1915                 }
1916                 info_id = WPA_GET_LE16(pos);
1917                 pos += 2;
1918                 slen = WPA_GET_LE16(pos);
1919                 pos += 2;
1920                 if (pos + slen > end) {
1921                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1922                                    "for Info ID %u", info_id);
1923                         break;
1924                 }
1925                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1926                                                 slen);
1927                 pos += slen;
1928         }
1929 }
1930
1931
1932 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1933                                           struct wpa_scan_results *scan_res)
1934 {
1935         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1936                    "ANQP fetch");
1937         interworking_start_fetch_anqp(wpa_s);
1938 }
1939
1940
1941 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1942 {
1943         interworking_stop_fetch_anqp(wpa_s);
1944         wpa_s->network_select = 1;
1945         wpa_s->auto_network_select = 0;
1946         wpa_s->auto_select = !!auto_select;
1947         wpa_s->fetch_all_anqp = 0;
1948         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
1949                    "selection");
1950         wpa_s->scan_res_handler = interworking_scan_res_handler;
1951         wpa_s->scan_req = 2;
1952         wpa_supplicant_req_scan(wpa_s, 0, 0);
1953
1954         return 0;
1955 }
1956
1957
1958 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
1959                         enum gas_query_result result,
1960                         const struct wpabuf *adv_proto,
1961                         const struct wpabuf *resp, u16 status_code)
1962 {
1963         struct wpa_supplicant *wpa_s = ctx;
1964
1965         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
1966                 " dialog_token=%d status_code=%d resp_len=%d",
1967                 MAC2STR(addr), dialog_token, status_code,
1968                 resp ? (int) wpabuf_len(resp) : -1);
1969         if (!resp)
1970                 return;
1971
1972         wpabuf_free(wpa_s->last_gas_resp);
1973         wpa_s->last_gas_resp = wpabuf_dup(resp);
1974         if (wpa_s->last_gas_resp == NULL)
1975                 return;
1976         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
1977         wpa_s->last_gas_dialog_token = dialog_token;
1978 }
1979
1980
1981 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
1982                      const struct wpabuf *adv_proto,
1983                      const struct wpabuf *query)
1984 {
1985         struct wpabuf *buf;
1986         int ret = 0;
1987         int freq;
1988         struct wpa_bss *bss;
1989         int res;
1990         size_t len;
1991         u8 query_resp_len_limit = 0, pame_bi = 0;
1992
1993         freq = wpa_s->assoc_freq;
1994         bss = wpa_bss_get_bssid(wpa_s, dst);
1995         if (bss)
1996                 freq = bss->freq;
1997         if (freq <= 0)
1998                 return -1;
1999
2000         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2001                    MAC2STR(dst), freq);
2002         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2003         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2004
2005         len = 3 + wpabuf_len(adv_proto) + 2;
2006         if (query)
2007                 len += wpabuf_len(query);
2008         buf = gas_build_initial_req(0, len);
2009         if (buf == NULL)
2010                 return -1;
2011
2012         /* Advertisement Protocol IE */
2013         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2014         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2015         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2016                       (pame_bi ? 0x80 : 0));
2017         wpabuf_put_buf(buf, adv_proto);
2018
2019         /* GAS Query */
2020         if (query) {
2021                 wpabuf_put_le16(buf, wpabuf_len(query));
2022                 wpabuf_put_buf(buf, query);
2023         } else
2024                 wpabuf_put_le16(buf, 0);
2025
2026         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2027         if (res < 0) {
2028                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2029                 ret = -1;
2030         } else
2031                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2032                            "%u", res);
2033
2034         wpabuf_free(buf);
2035         return ret;
2036 }