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         if (cred->private_key && cred->private_key[0] &&
1050             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1051                 return -1;
1052
1053         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1054             wpa_config_set_quoted(ssid, "private_key_passwd",
1055                                   cred->private_key_passwd) < 0)
1056                 return -1;
1057
1058         if (cred->phase1) {
1059                 os_free(ssid->eap.phase1);
1060                 ssid->eap.phase1 = os_strdup(cred->phase1);
1061         }
1062         if (cred->phase2) {
1063                 os_free(ssid->eap.phase2);
1064                 ssid->eap.phase2 = os_strdup(cred->phase2);
1065         }
1066
1067         if (cred->ca_cert && cred->ca_cert[0] &&
1068             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1069                 return -1;
1070
1071         return 0;
1072 }
1073
1074
1075 static int interworking_connect_roaming_consortium(
1076         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1077         struct wpa_bss *bss, const u8 *ssid_ie)
1078 {
1079         struct wpa_ssid *ssid;
1080
1081         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1082                    "roaming consortium match", MAC2STR(bss->bssid));
1083
1084         ssid = wpa_config_add_network(wpa_s->conf);
1085         if (ssid == NULL)
1086                 return -1;
1087         wpas_notify_network_added(wpa_s, ssid);
1088         wpa_config_set_network_defaults(ssid);
1089         ssid->priority = cred->priority;
1090         ssid->temporary = 1;
1091         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1092         if (ssid->ssid == NULL)
1093                 goto fail;
1094         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1095         ssid->ssid_len = ssid_ie[1];
1096
1097         if (interworking_set_hs20_params(ssid) < 0)
1098                 goto fail;
1099
1100         if (cred->eap_method == NULL) {
1101                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1102                            "credential using roaming consortium");
1103                 goto fail;
1104         }
1105
1106         if (interworking_set_eap_params(
1107                     ssid, cred,
1108                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1109                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1110                 goto fail;
1111
1112         wpa_config_update_prio_list(wpa_s->conf);
1113         interworking_reconnect(wpa_s);
1114
1115         return 0;
1116
1117 fail:
1118         wpas_notify_network_removed(wpa_s, ssid);
1119         wpa_config_remove_network(wpa_s->conf, ssid->id);
1120         return -1;
1121 }
1122
1123
1124 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1125 {
1126         struct wpa_cred *cred;
1127         struct wpa_ssid *ssid;
1128         struct nai_realm *realm;
1129         struct nai_realm_eap *eap = NULL;
1130         u16 count, i;
1131         char buf[100];
1132         const u8 *ie;
1133
1134         if (wpa_s->conf->cred == NULL || bss == NULL)
1135                 return -1;
1136         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1137         if (ie == NULL || ie[1] == 0) {
1138                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1139                            MACSTR, MAC2STR(bss->bssid));
1140                 return -1;
1141         }
1142
1143         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1144                 /*
1145                  * We currently support only HS 2.0 networks and those are
1146                  * required to use WPA2-Enterprise.
1147                  */
1148                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1149                            "RSN");
1150                 return -1;
1151         }
1152
1153         cred = interworking_credentials_available_roaming_consortium(wpa_s,
1154                                                                      bss);
1155         if (cred)
1156                 return interworking_connect_roaming_consortium(wpa_s, cred,
1157                                                                bss, ie);
1158
1159         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1160                                 &count);
1161         if (realm == NULL) {
1162                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1163                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1164                 count = 0;
1165         }
1166
1167         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1168                 for (i = 0; i < count; i++) {
1169                         if (!nai_realm_match(&realm[i], cred->realm))
1170                                 continue;
1171                         eap = nai_realm_find_eap(cred, &realm[i]);
1172                         if (eap)
1173                                 break;
1174                 }
1175                 if (eap)
1176                         break;
1177         }
1178
1179         if (!eap) {
1180                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
1181                         if (realm)
1182                                 nai_realm_free(realm, count);
1183                         return 0;
1184                 }
1185
1186                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1187                            "and EAP method found for " MACSTR,
1188                            MAC2STR(bss->bssid));
1189                 nai_realm_free(realm, count);
1190                 return -1;
1191         }
1192
1193         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1194                    MAC2STR(bss->bssid));
1195
1196         ssid = wpa_config_add_network(wpa_s->conf);
1197         if (ssid == NULL) {
1198                 nai_realm_free(realm, count);
1199                 return -1;
1200         }
1201         wpas_notify_network_added(wpa_s, ssid);
1202         wpa_config_set_network_defaults(ssid);
1203         ssid->priority = cred->priority;
1204         ssid->temporary = 1;
1205         ssid->ssid = os_zalloc(ie[1] + 1);
1206         if (ssid->ssid == NULL)
1207                 goto fail;
1208         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1209         ssid->ssid_len = ie[1];
1210
1211         if (interworking_set_hs20_params(ssid) < 0)
1212                 goto fail;
1213
1214         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1215                                                      eap->method), 0) < 0)
1216                 goto fail;
1217
1218         switch (eap->method) {
1219         case EAP_TYPE_TTLS:
1220                 if (eap->inner_method) {
1221                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1222                                     eap_get_name(EAP_VENDOR_IETF,
1223                                                  eap->inner_method));
1224                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1225                                 goto fail;
1226                         break;
1227                 }
1228                 switch (eap->inner_non_eap) {
1229                 case NAI_REALM_INNER_NON_EAP_PAP:
1230                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1231                             0)
1232                                 goto fail;
1233                         break;
1234                 case NAI_REALM_INNER_NON_EAP_CHAP:
1235                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1236                             < 0)
1237                                 goto fail;
1238                         break;
1239                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1240                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1241                                            0) < 0)
1242                                 goto fail;
1243                         break;
1244                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1245                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1246                                            0) < 0)
1247                                 goto fail;
1248                         break;
1249                 }
1250                 break;
1251         case EAP_TYPE_PEAP:
1252                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1253                             eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
1254                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1255                         goto fail;
1256                 break;
1257         case EAP_TYPE_TLS:
1258                 break;
1259         }
1260
1261         if (interworking_set_eap_params(ssid, cred,
1262                                         eap->method == EAP_TYPE_TTLS) < 0)
1263                 goto fail;
1264
1265         nai_realm_free(realm, count);
1266
1267         wpa_config_update_prio_list(wpa_s->conf);
1268         interworking_reconnect(wpa_s);
1269
1270         return 0;
1271
1272 fail:
1273         wpas_notify_network_removed(wpa_s, ssid);
1274         wpa_config_remove_network(wpa_s->conf, ssid->id);
1275         nai_realm_free(realm, count);
1276         return -1;
1277 }
1278
1279
1280 static struct wpa_cred * interworking_credentials_available_3gpp(
1281         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1282 {
1283         struct wpa_cred *cred, *selected = NULL;
1284         int ret;
1285
1286 #ifdef INTERWORKING_3GPP
1287         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1288                 return NULL;
1289
1290         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1291                 char *sep;
1292                 const char *imsi;
1293                 int mnc_len;
1294
1295 #ifdef PCSC_FUNCS
1296                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1297                     wpa_s->imsi[0]) {
1298                         imsi = wpa_s->imsi;
1299                         mnc_len = wpa_s->mnc_len;
1300                         goto compare;
1301                 }
1302 #endif /* PCSC_FUNCS */
1303
1304                 if (cred->imsi == NULL || !cred->imsi[0] ||
1305                     cred->milenage == NULL || !cred->milenage[0])
1306                         continue;
1307
1308                 sep = os_strchr(cred->imsi, '-');
1309                 if (sep == NULL ||
1310                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1311                         continue;
1312                 mnc_len = sep - cred->imsi - 3;
1313                 imsi = cred->imsi;
1314
1315 #ifdef PCSC_FUNCS
1316         compare:
1317 #endif /* PCSC_FUNCS */
1318                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1319                            MACSTR, MAC2STR(bss->bssid));
1320                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1321                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1322                 if (ret) {
1323                         if (selected == NULL ||
1324                             selected->priority < cred->priority)
1325                                 selected = cred;
1326                 }
1327         }
1328 #endif /* INTERWORKING_3GPP */
1329         return selected;
1330 }
1331
1332
1333 static struct wpa_cred * interworking_credentials_available_realm(
1334         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1335 {
1336         struct wpa_cred *cred, *selected = NULL;
1337         struct nai_realm *realm;
1338         u16 count, i;
1339
1340         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1341                 return NULL;
1342
1343         if (wpa_s->conf->cred == NULL)
1344                 return NULL;
1345
1346         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1347                    MACSTR, MAC2STR(bss->bssid));
1348         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1349         if (realm == NULL) {
1350                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1351                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1352                 return NULL;
1353         }
1354
1355         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1356                 if (cred->realm == NULL)
1357                         continue;
1358
1359                 for (i = 0; i < count; i++) {
1360                         if (!nai_realm_match(&realm[i], cred->realm))
1361                                 continue;
1362                         if (nai_realm_find_eap(cred, &realm[i])) {
1363                                 if (selected == NULL ||
1364                                     selected->priority < cred->priority)
1365                                         selected = cred;
1366                                 break;
1367                         }
1368                 }
1369         }
1370
1371         nai_realm_free(realm, count);
1372
1373         return selected;
1374 }
1375
1376
1377 static struct wpa_cred * interworking_credentials_available(
1378         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1379 {
1380         struct wpa_cred *cred, *cred2;
1381
1382         cred = interworking_credentials_available_realm(wpa_s, bss);
1383         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1384         if (cred && cred2 && cred2->priority >= cred->priority)
1385                 cred = cred2;
1386         if (!cred)
1387                 cred = cred2;
1388
1389         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1390                                                                       bss);
1391         if (cred && cred2 && cred2->priority >= cred->priority)
1392                 cred = cred2;
1393         if (!cred)
1394                 cred = cred2;
1395
1396         return cred;
1397 }
1398
1399
1400 static int domain_name_list_contains(struct wpabuf *domain_names,
1401                                      const char *domain)
1402 {
1403         const u8 *pos, *end;
1404         size_t len;
1405
1406         len = os_strlen(domain);
1407         pos = wpabuf_head(domain_names);
1408         end = pos + wpabuf_len(domain_names);
1409
1410         while (pos + 1 < end) {
1411                 if (pos + 1 + pos[0] > end)
1412                         break;
1413
1414                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1415                                   pos + 1, pos[0]);
1416                 if (pos[0] == len &&
1417                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1418                         return 1;
1419
1420                 pos += 1 + pos[0];
1421         }
1422
1423         return 0;
1424 }
1425
1426
1427 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1428                                 struct wpabuf *domain_names)
1429 {
1430         struct wpa_cred *cred;
1431 #ifdef INTERWORKING_3GPP
1432         char nai[100], *realm;
1433 #endif /* INTERWORKING_3GPP */
1434
1435         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1436                 return -1;
1437
1438         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1439 #ifdef INTERWORKING_3GPP
1440                 char *imsi = NULL;
1441                 int mnc_len = 0;
1442                 if (cred->imsi)
1443                         imsi = cred->imsi;
1444 #ifdef CONFIG_PCSC
1445                 else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1446                          wpa_s->scard && wpa_s->imsi[0]) {
1447                         imsi = wpa_s->imsi;
1448                         mnc_len = wpa_s->mnc_len;
1449                 }
1450 #endif /* CONFIG_PCSC */
1451                 if (imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0)
1452                     == 0) {
1453                         realm = os_strchr(nai, '@');
1454                         if (realm)
1455                                 realm++;
1456                         wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1457                                    "with SIM/USIM domain %s", realm);
1458                         if (realm &&
1459                             domain_name_list_contains(domain_names, realm))
1460                                 return 1;
1461                 }
1462 #endif /* INTERWORKING_3GPP */
1463
1464                 if (cred->domain == NULL)
1465                         continue;
1466
1467                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1468                            "home SP FQDN %s", cred->domain);
1469                 if (domain_name_list_contains(domain_names, cred->domain))
1470                         return 1;
1471         }
1472
1473         return 0;
1474 }
1475
1476
1477 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1478 {
1479         struct wpa_bss *bss;
1480         struct wpa_ssid *ssid;
1481
1482         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1483                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1484                         if (wpas_network_disabled(wpa_s, ssid) ||
1485                             ssid->mode != WPAS_MODE_INFRA)
1486                                 continue;
1487                         if (ssid->ssid_len != bss->ssid_len ||
1488                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1489                             0)
1490                                 continue;
1491                         /*
1492                          * TODO: Consider more accurate matching of security
1493                          * configuration similarly to what is done in events.c
1494                          */
1495                         return 1;
1496                 }
1497         }
1498
1499         return 0;
1500 }
1501
1502
1503 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1504 {
1505         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1506         int selected_prio = -999999, selected_home_prio = -999999;
1507         unsigned int count = 0;
1508         const char *type;
1509         int res;
1510         struct wpa_cred *cred;
1511
1512         wpa_s->network_select = 0;
1513
1514         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1515                 cred = interworking_credentials_available(wpa_s, bss);
1516                 if (!cred)
1517                         continue;
1518                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1519                         /*
1520                          * We currently support only HS 2.0 networks and those
1521                          * are required to use WPA2-Enterprise.
1522                          */
1523                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1524                                    "with " MACSTR " but network does not use "
1525                                    "RSN", MAC2STR(bss->bssid));
1526                         continue;
1527                 }
1528                 count++;
1529                 res = interworking_home_sp(wpa_s, bss->anqp ?
1530                                            bss->anqp->domain_name : NULL);
1531                 if (res > 0)
1532                         type = "home";
1533                 else if (res == 0)
1534                         type = "roaming";
1535                 else
1536                         type = "unknown";
1537                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1538                         MAC2STR(bss->bssid), type);
1539                 if (wpa_s->auto_select ||
1540                     (wpa_s->conf->auto_interworking &&
1541                      wpa_s->auto_network_select)) {
1542                         if (selected == NULL ||
1543                             cred->priority > selected_prio) {
1544                                 selected = bss;
1545                                 selected_prio = cred->priority;
1546                         }
1547                         if (res > 0 &&
1548                             (selected_home == NULL ||
1549                              cred->priority > selected_home_prio)) {
1550                                 selected_home = bss;
1551                                 selected_home_prio = cred->priority;
1552                         }
1553                 }
1554         }
1555
1556         if (selected_home && selected_home != selected &&
1557             selected_home_prio >= selected_prio) {
1558                 /* Prefer network operated by the Home SP */
1559                 selected = selected_home;
1560         }
1561
1562         if (count == 0) {
1563                 /*
1564                  * No matching network was found based on configured
1565                  * credentials. Check whether any of the enabled network blocks
1566                  * have matching APs.
1567                  */
1568                 if (interworking_find_network_match(wpa_s)) {
1569                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1570                                    "match for enabled network configurations");
1571                         if (wpa_s->auto_select)
1572                                 interworking_reconnect(wpa_s);
1573                         return;
1574                 }
1575
1576                 if (wpa_s->auto_network_select) {
1577                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1578                                    "scanning after ANQP fetch");
1579                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1580                                                 0);
1581                         return;
1582                 }
1583
1584                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1585                         "with matching credentials found");
1586         }
1587
1588         if (selected)
1589                 interworking_connect(wpa_s, selected);
1590 }
1591
1592
1593 static struct wpa_bss_anqp *
1594 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1595 {
1596         struct wpa_bss *other;
1597
1598         if (is_zero_ether_addr(bss->hessid))
1599                 return NULL; /* Cannot be in the same homegenous ESS */
1600
1601         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1602                 if (other == bss)
1603                         continue;
1604                 if (other->anqp == NULL)
1605                         continue;
1606                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1607                         continue;
1608                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1609                         continue;
1610                 if (bss->ssid_len != other->ssid_len ||
1611                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1612                         continue;
1613
1614                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1615                            "already fetched BSSID " MACSTR " and " MACSTR,
1616                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1617                 other->anqp->users++;
1618                 return other->anqp;
1619         }
1620
1621         return NULL;
1622 }
1623
1624
1625 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1626 {
1627         struct wpa_bss *bss;
1628         int found = 0;
1629         const u8 *ie;
1630
1631         if (!wpa_s->fetch_anqp_in_progress)
1632                 return;
1633
1634         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1635                 if (!(bss->caps & IEEE80211_CAP_ESS))
1636                         continue;
1637                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1638                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1639                         continue; /* AP does not support Interworking */
1640
1641                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1642                         if (bss->anqp == NULL) {
1643                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1644                                                                          bss);
1645                                 if (bss->anqp) {
1646                                         /* Shared data already fetched */
1647                                         continue;
1648                                 }
1649                                 bss->anqp = wpa_bss_anqp_alloc();
1650                                 if (bss->anqp == NULL)
1651                                         break;
1652                         }
1653                         found++;
1654                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1655                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1656                                 MACSTR, MAC2STR(bss->bssid));
1657                         interworking_anqp_send_req(wpa_s, bss);
1658                         break;
1659                 }
1660         }
1661
1662         if (found == 0) {
1663                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1664                 wpa_s->fetch_anqp_in_progress = 0;
1665                 if (wpa_s->network_select)
1666                         interworking_select_network(wpa_s);
1667         }
1668 }
1669
1670
1671 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1672 {
1673         struct wpa_bss *bss;
1674
1675         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1676                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1677
1678         wpa_s->fetch_anqp_in_progress = 1;
1679         interworking_next_anqp_fetch(wpa_s);
1680 }
1681
1682
1683 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1684 {
1685         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1686                 return 0;
1687
1688         wpa_s->network_select = 0;
1689         wpa_s->fetch_all_anqp = 1;
1690
1691         interworking_start_fetch_anqp(wpa_s);
1692
1693         return 0;
1694 }
1695
1696
1697 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1698 {
1699         if (!wpa_s->fetch_anqp_in_progress)
1700                 return;
1701
1702         wpa_s->fetch_anqp_in_progress = 0;
1703 }
1704
1705
1706 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1707                   u16 info_ids[], size_t num_ids)
1708 {
1709         struct wpabuf *buf;
1710         int ret = 0;
1711         int freq;
1712         struct wpa_bss *bss;
1713         int res;
1714
1715         freq = wpa_s->assoc_freq;
1716         bss = wpa_bss_get_bssid(wpa_s, dst);
1717         if (bss)
1718                 freq = bss->freq;
1719         if (freq <= 0)
1720                 return -1;
1721
1722         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1723                    MAC2STR(dst), (unsigned int) num_ids);
1724
1725         buf = anqp_build_req(info_ids, num_ids, NULL);
1726         if (buf == NULL)
1727                 return -1;
1728
1729         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1730         if (res < 0) {
1731                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1732                 ret = -1;
1733         } else
1734                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1735                            "%u", res);
1736
1737         wpabuf_free(buf);
1738         return ret;
1739 }
1740
1741
1742 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1743                                             const u8 *sa, u16 info_id,
1744                                             const u8 *data, size_t slen)
1745 {
1746         const u8 *pos = data;
1747         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1748         struct wpa_bss_anqp *anqp = NULL;
1749 #ifdef CONFIG_HS20
1750         u8 type;
1751 #endif /* CONFIG_HS20 */
1752
1753         if (bss)
1754                 anqp = bss->anqp;
1755
1756         switch (info_id) {
1757         case ANQP_CAPABILITY_LIST:
1758                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1759                         " ANQP Capability list", MAC2STR(sa));
1760                 break;
1761         case ANQP_VENUE_NAME:
1762                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1763                         " Venue Name", MAC2STR(sa));
1764                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1765                 if (anqp) {
1766                         wpabuf_free(anqp->venue_name);
1767                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1768                 }
1769                 break;
1770         case ANQP_NETWORK_AUTH_TYPE:
1771                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1772                         " Network Authentication Type information",
1773                         MAC2STR(sa));
1774                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1775                                   "Type", pos, slen);
1776                 if (anqp) {
1777                         wpabuf_free(anqp->network_auth_type);
1778                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1779                 }
1780                 break;
1781         case ANQP_ROAMING_CONSORTIUM:
1782                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1783                         " Roaming Consortium list", MAC2STR(sa));
1784                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1785                                   pos, slen);
1786                 if (anqp) {
1787                         wpabuf_free(anqp->roaming_consortium);
1788                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1789                 }
1790                 break;
1791         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1792                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1793                         " IP Address Type Availability information",
1794                         MAC2STR(sa));
1795                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1796                             pos, slen);
1797                 if (anqp) {
1798                         wpabuf_free(anqp->ip_addr_type_availability);
1799                         anqp->ip_addr_type_availability =
1800                                 wpabuf_alloc_copy(pos, slen);
1801                 }
1802                 break;
1803         case ANQP_NAI_REALM:
1804                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1805                         " NAI Realm list", MAC2STR(sa));
1806                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1807                 if (anqp) {
1808                         wpabuf_free(anqp->nai_realm);
1809                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1810                 }
1811                 break;
1812         case ANQP_3GPP_CELLULAR_NETWORK:
1813                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1814                         " 3GPP Cellular Network information", MAC2STR(sa));
1815                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1816                                   pos, slen);
1817                 if (anqp) {
1818                         wpabuf_free(anqp->anqp_3gpp);
1819                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1820                 }
1821                 break;
1822         case ANQP_DOMAIN_NAME:
1823                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1824                         " Domain Name list", MAC2STR(sa));
1825                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1826                 if (anqp) {
1827                         wpabuf_free(anqp->domain_name);
1828                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1829                 }
1830                 break;
1831         case ANQP_VENDOR_SPECIFIC:
1832                 if (slen < 3)
1833                         return;
1834
1835                 switch (WPA_GET_BE24(pos)) {
1836 #ifdef CONFIG_HS20
1837                 case OUI_WFA:
1838                         pos += 3;
1839                         slen -= 3;
1840
1841                         if (slen < 1)
1842                                 return;
1843                         type = *pos++;
1844                         slen--;
1845
1846                         switch (type) {
1847                         case HS20_ANQP_OUI_TYPE:
1848                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1849                                                              slen);
1850                                 break;
1851                         default:
1852                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1853                                            "vendor type %u", type);
1854                                 break;
1855                         }
1856                         break;
1857 #endif /* CONFIG_HS20 */
1858                 default:
1859                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1860                                    "vendor-specific ANQP OUI %06x",
1861                                    WPA_GET_BE24(pos));
1862                         return;
1863                 }
1864                 break;
1865         default:
1866                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1867                            "%u", info_id);
1868                 break;
1869         }
1870 }
1871
1872
1873 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1874                   enum gas_query_result result,
1875                   const struct wpabuf *adv_proto,
1876                   const struct wpabuf *resp, u16 status_code)
1877 {
1878         struct wpa_supplicant *wpa_s = ctx;
1879         const u8 *pos;
1880         const u8 *end;
1881         u16 info_id;
1882         u16 slen;
1883
1884         if (result != GAS_QUERY_SUCCESS)
1885                 return;
1886
1887         pos = wpabuf_head(adv_proto);
1888         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1889             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1890                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1891                            "Protocol in response");
1892                 return;
1893         }
1894
1895         pos = wpabuf_head(resp);
1896         end = pos + wpabuf_len(resp);
1897
1898         while (pos < end) {
1899                 if (pos + 4 > end) {
1900                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1901                         break;
1902                 }
1903                 info_id = WPA_GET_LE16(pos);
1904                 pos += 2;
1905                 slen = WPA_GET_LE16(pos);
1906                 pos += 2;
1907                 if (pos + slen > end) {
1908                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1909                                    "for Info ID %u", info_id);
1910                         break;
1911                 }
1912                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1913                                                 slen);
1914                 pos += slen;
1915         }
1916 }
1917
1918
1919 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1920                                           struct wpa_scan_results *scan_res)
1921 {
1922         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1923                    "ANQP fetch");
1924         interworking_start_fetch_anqp(wpa_s);
1925 }
1926
1927
1928 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1929 {
1930         interworking_stop_fetch_anqp(wpa_s);
1931         wpa_s->network_select = 1;
1932         wpa_s->auto_network_select = 0;
1933         wpa_s->auto_select = !!auto_select;
1934         wpa_s->fetch_all_anqp = 0;
1935         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
1936                    "selection");
1937         wpa_s->scan_res_handler = interworking_scan_res_handler;
1938         wpa_s->scan_req = 2;
1939         wpa_supplicant_req_scan(wpa_s, 0, 0);
1940
1941         return 0;
1942 }
1943
1944
1945 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
1946                         enum gas_query_result result,
1947                         const struct wpabuf *adv_proto,
1948                         const struct wpabuf *resp, u16 status_code)
1949 {
1950         struct wpa_supplicant *wpa_s = ctx;
1951
1952         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
1953                 " dialog_token=%d status_code=%d resp_len=%d",
1954                 MAC2STR(addr), dialog_token, status_code,
1955                 resp ? (int) wpabuf_len(resp) : -1);
1956         if (!resp)
1957                 return;
1958
1959         wpabuf_free(wpa_s->last_gas_resp);
1960         wpa_s->last_gas_resp = wpabuf_dup(resp);
1961         if (wpa_s->last_gas_resp == NULL)
1962                 return;
1963         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
1964         wpa_s->last_gas_dialog_token = dialog_token;
1965 }
1966
1967
1968 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
1969                      const struct wpabuf *adv_proto,
1970                      const struct wpabuf *query)
1971 {
1972         struct wpabuf *buf;
1973         int ret = 0;
1974         int freq;
1975         struct wpa_bss *bss;
1976         int res;
1977         size_t len;
1978         u8 query_resp_len_limit = 0, pame_bi = 0;
1979
1980         freq = wpa_s->assoc_freq;
1981         bss = wpa_bss_get_bssid(wpa_s, dst);
1982         if (bss)
1983                 freq = bss->freq;
1984         if (freq <= 0)
1985                 return -1;
1986
1987         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
1988                    MAC2STR(dst), freq);
1989         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
1990         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
1991
1992         len = 3 + wpabuf_len(adv_proto) + 2;
1993         if (query)
1994                 len += wpabuf_len(query);
1995         buf = gas_build_initial_req(0, len);
1996         if (buf == NULL)
1997                 return -1;
1998
1999         /* Advertisement Protocol IE */
2000         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2001         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2002         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2003                       (pame_bi ? 0x80 : 0));
2004         wpabuf_put_buf(buf, adv_proto);
2005
2006         /* GAS Query */
2007         if (query) {
2008                 wpabuf_put_le16(buf, wpabuf_len(query));
2009                 wpabuf_put_buf(buf, query);
2010         } else
2011                 wpabuf_put_le16(buf, 0);
2012
2013         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2014         if (res < 0) {
2015                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2016                 ret = -1;
2017         } else
2018                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2019                            "%u", res);
2020
2021         wpabuf_free(buf);
2022         return ret;
2023 }