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                 if (eap->inner_method &&
 521                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 522                         return 0;
 523                 if (!eap->inner_method &&
 524                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
 525                         return 0;
 526         }
 527
 528         if (eap->method == EAP_TYPE_TTLS) {
 529                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 530                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 531                 if (eap->inner_method &&
 532                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 533                         return 0;
 534                 if (eap->inner_non_eap &&
 535                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 536                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 537                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 538                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 539                         return 0;
 540         }
 541
 542         if (eap->inner_method &&
 543             eap->inner_method != EAP_TYPE_GTC &&
 544             eap->inner_method != EAP_TYPE_MSCHAPV2)
 545                 return 0;
 546
 547         return 1;
 548 }
 549
 550
 551 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 552 {
 553         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 554                 return 0; /* method not supported */
 555
 556         if (eap->method != EAP_TYPE_TLS) {
 557                 /* Only EAP-TLS supported for credential authentication */
 558                 return 0;
 559         }
 560
 561         return 1;
 562 }
 563
 564
 565 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 566                                                  struct nai_realm *realm)
 567 {
 568         u8 e;
 569
 570         if (cred == NULL ||
 571             cred->username == NULL ||
 572             cred->username[0] == '\0' ||
 573             ((cred->password == NULL ||
 574               cred->password[0] == '\0') &&
 575              (cred->private_key == NULL ||
 576               cred->private_key[0] == '\0')))
 577                 return NULL;
 578
 579         for (e = 0; e < realm->eap_count; e++) {
 580                 struct nai_realm_eap *eap = &realm->eap[e];
 581                 if (cred->password && cred->password[0] &&
 582                     nai_realm_cred_username(eap))
 583                         return eap;
 584                 if (cred->private_key && cred->private_key[0] &&
 585                     nai_realm_cred_cert(eap))
 586                         return eap;
 587         }
 588
 589         return NULL;
 590 }
 591
 592
 593 #ifdef INTERWORKING_3GPP
 594
 595 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 596 {
 597         u8 plmn[3];
 598         const u8 *pos, *end;
 599         u8 udhl;
 600
 601         /* See Annex A of 3GPP TS 24.234 v8.1.0 for description */
 602         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 603         plmn[1] = imsi[2] - '0';
 604         /* default to MNC length 3 if unknown */
 605         if (mnc_len != 2)
 606                 plmn[1] |= (imsi[5] - '0') << 4;
 607         else
 608                 plmn[1] |= 0xf0;
 609         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 610
 611         if (anqp == NULL)
 612                 return 0;
 613         pos = wpabuf_head_u8(anqp);
 614         end = pos + wpabuf_len(anqp);
 615         if (pos + 2 > end)
 616                 return 0;
 617         if (*pos != 0) {
 618                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 619                 return 0;
 620         }
 621         pos++;
 622         udhl = *pos++;
 623         if (pos + udhl > end) {
 624                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 625                 return 0;
 626         }
 627         end = pos + udhl;
 628
 629         while (pos + 2 <= end) {
 630                 u8 iei, len;
 631                 const u8 *l_end;
 632                 iei = *pos++;
 633                 len = *pos++ & 0x7f;
 634                 if (pos + len > end)
 635                         break;
 636                 l_end = pos + len;
 637
 638                 if (iei == 0 && len > 0) {
 639                         /* PLMN List */
 640                         u8 num, i;
 641                         num = *pos++;
 642                         for (i = 0; i < num; i++) {
 643                                 if (pos + 3 > end)
 644                                         break;
 645                                 if (os_memcmp(pos, plmn, 3) == 0)
 646                                         return 1; /* Found matching PLMN */
 647                                 pos += 3;
 648                         }
 649                 }
 650
 651                 pos = l_end;
 652         }
 653
 654         return 0;
 655 }
 656
 657
 658 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 659                           size_t mnc_len, char prefix)
 660 {
 661         const char *sep, *msin;
 662         char *end, *pos;
 663         size_t msin_len, plmn_len;
 664
 665         /*
 666          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 667          * Root NAI:
 668          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 669          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 670          */
 671
 672         if (imsi == NULL || os_strlen(imsi) > 16) {
 673                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 674                 return -1;
 675         }
 676         sep = os_strchr(imsi, '-');
 677         if (sep) {
 678                 plmn_len = sep - imsi;
 679                 msin = sep + 1;
 680         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 681                 plmn_len = 3 + mnc_len;
 682                 msin = imsi + plmn_len;
 683         } else
 684                 return -1;
 685         if (plmn_len != 5 && plmn_len != 6)
 686                 return -1;
 687         msin_len = os_strlen(msin);
 688
 689         pos = nai;
 690         end = nai + nai_len;
 691         if (prefix)
 692                 *pos++ = prefix;
 693         os_memcpy(pos, imsi, plmn_len);
 694         pos += plmn_len;
 695         os_memcpy(pos, msin, msin_len);
 696         pos += msin_len;
 697         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 698         if (plmn_len == 5) {
 699                 *pos++ = '0';
 700                 *pos++ = imsi[3];
 701                 *pos++ = imsi[4];
 702         } else {
 703                 *pos++ = imsi[3];
 704                 *pos++ = imsi[4];
 705                 *pos++ = imsi[5];
 706         }
 707         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 708                            imsi[0], imsi[1], imsi[2]);
 709
 710         return 0;
 711 }
 712
 713
 714 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 715 {
 716         char nai[100];
 717         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 718                 return -1;
 719         return wpa_config_set_quoted(ssid, "identity", nai);
 720 }
 721
 722 #endif /* INTERWORKING_3GPP */
 723
 724
 725 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 726                                         struct wpa_ssid *ssid)
 727 {
 728         if (wpa_config_set(ssid, "key_mgmt",
 729                            wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 730                            "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0)
 731                 return -1;
 732         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 733                 return -1;
 734         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 735                 return -1;
 736         return 0;
 737 }
 738
 739
 740 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 741                                      struct wpa_bss *bss)
 742 {
 743 #ifdef INTERWORKING_3GPP
 744         struct wpa_cred *cred;
 745         struct wpa_ssid *ssid;
 746         const u8 *ie;
 747         int eap_type;
 748         int res;
 749         char prefix;
 750
 751         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 752                 return -1;
 753
 754         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 755                 char *sep;
 756                 const char *imsi;
 757                 int mnc_len;
 758
 759 #ifdef PCSC_FUNCS
 760                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
 761                     wpa_s->imsi[0]) {
 762                         imsi = wpa_s->imsi;
 763                         mnc_len = wpa_s->mnc_len;
 764                         goto compare;
 765                 }
 766 #endif /* PCSC_FUNCS */
 767
 768                 if (cred->imsi == NULL || !cred->imsi[0] ||
 769                     cred->milenage == NULL || !cred->milenage[0])
 770                         continue;
 771
 772                 sep = os_strchr(cred->imsi, '-');
 773                 if (sep == NULL ||
 774                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
 775                         continue;
 776                 mnc_len = sep - cred->imsi - 3;
 777                 imsi = cred->imsi;
 778
 779 #ifdef PCSC_FUNCS
 780         compare:
 781 #endif /* PCSC_FUNCS */
 782                 if (plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len))
 783                         break;
 784         }
 785         if (cred == NULL)
 786                 return -1;
 787
 788         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 789         if (ie == NULL)
 790                 return -1;
 791         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 792                    MAC2STR(bss->bssid));
 793
 794         ssid = wpa_config_add_network(wpa_s->conf);
 795         if (ssid == NULL)
 796                 return -1;
 797         ssid->parent_cred = cred;
 798
 799         wpas_notify_network_added(wpa_s, ssid);
 800         wpa_config_set_network_defaults(ssid);
 801         ssid->priority = cred->priority;
 802         ssid->temporary = 1;
 803         ssid->ssid = os_zalloc(ie[1] + 1);
 804         if (ssid->ssid == NULL)
 805                 goto fail;
 806         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 807         ssid->ssid_len = ie[1];
 808
 809         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 810                 goto fail;
 811
 812         eap_type = EAP_TYPE_SIM;
 813         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 814                 eap_type = EAP_TYPE_AKA;
 815         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
 816                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
 817                     cred->eap_method[0].method == EAP_TYPE_AKA ||
 818                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
 819                         eap_type = cred->eap_method[0].method;
 820         }
 821
 822         switch (eap_type) {
 823         case EAP_TYPE_SIM:
 824                 prefix = '1';
 825                 res = wpa_config_set(ssid, "eap", "SIM", 0);
 826                 break;
 827         case EAP_TYPE_AKA:
 828                 prefix = '0';
 829                 res = wpa_config_set(ssid, "eap", "AKA", 0);
 830                 break;
 831         case EAP_TYPE_AKA_PRIME:
 832                 prefix = '6';
 833                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
 834                 break;
 835         default:
 836                 res = -1;
 837                 break;
 838         }
 839         if (res < 0) {
 840                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
 841                            eap_type);
 842                 goto fail;
 843         }
 844
 845         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
 846                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 847                 goto fail;
 848         }
 849
 850         if (cred->milenage && cred->milenage[0]) {
 851                 if (wpa_config_set_quoted(ssid, "password",
 852                                           cred->milenage) < 0)
 853                         goto fail;
 854         } else if (cred->pcsc) {
 855                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 856                         goto fail;
 857                 if (wpa_s->conf->pcsc_pin &&
 858                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 859                     < 0)
 860                         goto fail;
 861         }
 862
 863         if (cred->password && cred->password[0] &&
 864             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 865                 goto fail;
 866
 867         wpa_config_update_prio_list(wpa_s->conf);
 868         interworking_reconnect(wpa_s);
 869
 870         return 0;
 871
 872 fail:
 873         wpas_notify_network_removed(wpa_s, ssid);
 874         wpa_config_remove_network(wpa_s->conf, ssid->id);
 875 #endif /* INTERWORKING_3GPP */
 876         return -1;
 877 }
 878
 879
 880 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 881                                             size_t rc_len)
 882 {
 883         const u8 *pos, *end;
 884         u8 lens;
 885
 886         if (ie == NULL)
 887                 return 0;
 888
 889         pos = ie + 2;
 890         end = ie + 2 + ie[1];
 891
 892         /* Roaming Consortium element:
 893          * Number of ANQP OIs
 894          * OI #1 and #2 lengths
 895          * OI #1, [OI #2], [OI #3]
 896          */
 897
 898         if (pos + 2 > end)
 899                 return 0;
 900
 901         pos++; /* skip Number of ANQP OIs */
 902         lens = *pos++;
 903         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 904                 return 0;
 905
 906         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 907                 return 1;
 908         pos += lens & 0x0f;
 909
 910         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 911                 return 1;
 912         pos += lens >> 4;
 913
 914         if (pos < end && (size_t) (end - pos) == rc_len &&
 915             os_memcmp(pos, rc_id, rc_len) == 0)
 916                 return 1;
 917
 918         return 0;
 919 }
 920
 921
 922 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 923                                          const u8 *rc_id, size_t rc_len)
 924 {
 925         const u8 *pos, *end;
 926         u8 len;
 927
 928         if (anqp == NULL)
 929                 return 0;
 930
 931         pos = wpabuf_head(anqp);
 932         end = pos + wpabuf_len(anqp);
 933
 934         /* Set of <OI Length, OI> duples */
 935         while (pos < end) {
 936                 len = *pos++;
 937                 if (pos + len > end)
 938                         break;
 939                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 940                         return 1;
 941                 pos += len;
 942         }
 943
 944         return 0;
 945 }
 946
 947
 948 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
 949                                     const u8 *rc_id, size_t rc_len)
 950 {
 951         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
 952                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
 953 }
 954
 955
 956 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
 957 {
 958         size_t i;
 959
 960         if (!cred->excluded_ssid)
 961                 return 0;
 962
 963         for (i = 0; i < cred->num_excluded_ssid; i++) {
 964                 struct excluded_ssid *e = &cred->excluded_ssid[i];
 965                 if (bss->ssid_len == e->ssid_len &&
 966                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
 967                         return 1;
 968         }
 969
 970         return 0;
 971 }
 972
 973
 974 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 975         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 976 {
 977         struct wpa_cred *cred, *selected = NULL;
 978         const u8 *ie;
 979
 980         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 981
 982         if (ie == NULL &&
 983             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 984                 return NULL;
 985
 986         if (wpa_s->conf->cred == NULL)
 987                 return NULL;
 988
 989         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 990                 if (cred->roaming_consortium_len == 0)
 991                         continue;
 992
 993                 if (!roaming_consortium_match(ie,
 994                                               bss->anqp ?
 995                                               bss->anqp->roaming_consortium :
 996                                               NULL,
 997                                               cred->roaming_consortium,
 998                                               cred->roaming_consortium_len))
 999                         continue;
1000
1001                 if (cred_excluded_ssid(cred, bss))
1002                         continue;
1003
1004                 if (selected == NULL ||
1005                     selected->priority < cred->priority)
1006                         selected = cred;
1007         }
1008
1009         return selected;
1010 }
1011
1012
1013 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1014                                        struct wpa_cred *cred, int ttls)
1015 {
1016         if (cred->eap_method) {
1017                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1018                         cred->eap_method->method == EAP_TYPE_TTLS;
1019
1020                 os_free(ssid->eap.eap_methods);
1021                 ssid->eap.eap_methods =
1022                         os_malloc(sizeof(struct eap_method_type) * 2);
1023                 if (ssid->eap.eap_methods == NULL)
1024                         return -1;
1025                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1026                           sizeof(*cred->eap_method));
1027                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1028                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1029         }
1030
1031         if (ttls && cred->username && cred->username[0]) {
1032                 const char *pos;
1033                 char *anon;
1034                 /* Use anonymous NAI in Phase 1 */
1035                 pos = os_strchr(cred->username, '@');
1036                 if (pos) {
1037                         size_t buflen = 9 + os_strlen(pos) + 1;
1038                         anon = os_malloc(buflen);
1039                         if (anon == NULL)
1040                                 return -1;
1041                         os_snprintf(anon, buflen, "anonymous%s", pos);
1042                 } else if (cred->realm) {
1043                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1044                         anon = os_malloc(buflen);
1045                         if (anon == NULL)
1046                                 return -1;
1047                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1048                 } else {
1049                         anon = os_strdup("anonymous");
1050                         if (anon == NULL)
1051                                 return -1;
1052                 }
1053                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1054                     0) {
1055                         os_free(anon);
1056                         return -1;
1057                 }
1058                 os_free(anon);
1059         }
1060
1061         if (cred->username && cred->username[0] &&
1062             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1063                 return -1;
1064
1065         if (cred->password && cred->password[0]) {
1066                 if (cred->ext_password &&
1067                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1068                         return -1;
1069                 if (!cred->ext_password &&
1070                     wpa_config_set_quoted(ssid, "password", cred->password) <
1071                     0)
1072                         return -1;
1073         }
1074
1075         if (cred->client_cert && cred->client_cert[0] &&
1076             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1077                 return -1;
1078
1079 #ifdef ANDROID
1080         if (cred->private_key &&
1081             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1082                 /* Use OpenSSL engine configuration for Android keystore */
1083                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1084                     wpa_config_set_quoted(ssid, "key_id",
1085                                           cred->private_key + 11) < 0 ||
1086                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1087                         return -1;
1088         } else
1089 #endif /* ANDROID */
1090         if (cred->private_key && cred->private_key[0] &&
1091             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1092                 return -1;
1093
1094         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1095             wpa_config_set_quoted(ssid, "private_key_passwd",
1096                                   cred->private_key_passwd) < 0)
1097                 return -1;
1098
1099         if (cred->phase1) {
1100                 os_free(ssid->eap.phase1);
1101                 ssid->eap.phase1 = os_strdup(cred->phase1);
1102         }
1103         if (cred->phase2) {
1104                 os_free(ssid->eap.phase2);
1105                 ssid->eap.phase2 = os_strdup(cred->phase2);
1106         }
1107
1108         if (cred->ca_cert && cred->ca_cert[0] &&
1109             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1110                 return -1;
1111
1112         return 0;
1113 }
1114
1115
1116 static int interworking_connect_roaming_consortium(
1117         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1118         struct wpa_bss *bss, const u8 *ssid_ie)
1119 {
1120         struct wpa_ssid *ssid;
1121
1122         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1123                    "roaming consortium match", MAC2STR(bss->bssid));
1124
1125         ssid = wpa_config_add_network(wpa_s->conf);
1126         if (ssid == NULL)
1127                 return -1;
1128         ssid->parent_cred = cred;
1129         wpas_notify_network_added(wpa_s, ssid);
1130         wpa_config_set_network_defaults(ssid);
1131         ssid->priority = cred->priority;
1132         ssid->temporary = 1;
1133         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1134         if (ssid->ssid == NULL)
1135                 goto fail;
1136         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1137         ssid->ssid_len = ssid_ie[1];
1138
1139         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1140                 goto fail;
1141
1142         if (cred->eap_method == NULL) {
1143                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1144                            "credential using roaming consortium");
1145                 goto fail;
1146         }
1147
1148         if (interworking_set_eap_params(
1149                     ssid, cred,
1150                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1151                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1152                 goto fail;
1153
1154         wpa_config_update_prio_list(wpa_s->conf);
1155         interworking_reconnect(wpa_s);
1156
1157         return 0;
1158
1159 fail:
1160         wpas_notify_network_removed(wpa_s, ssid);
1161         wpa_config_remove_network(wpa_s->conf, ssid->id);
1162         return -1;
1163 }
1164
1165
1166 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1167 {
1168         struct wpa_cred *cred;
1169         struct wpa_ssid *ssid;
1170         struct nai_realm *realm;
1171         struct nai_realm_eap *eap = NULL;
1172         u16 count, i;
1173         char buf[100];
1174         const u8 *ie;
1175
1176         if (wpa_s->conf->cred == NULL || bss == NULL)
1177                 return -1;
1178         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1179         if (ie == NULL || ie[1] == 0) {
1180                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1181                            MACSTR, MAC2STR(bss->bssid));
1182                 return -1;
1183         }
1184
1185         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1186                 /*
1187                  * We currently support only HS 2.0 networks and those are
1188                  * required to use WPA2-Enterprise.
1189                  */
1190                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1191                            "RSN");
1192                 return -1;
1193         }
1194
1195         cred = interworking_credentials_available_roaming_consortium(wpa_s,
1196                                                                      bss);
1197         if (cred)
1198                 return interworking_connect_roaming_consortium(wpa_s, cred,
1199                                                                bss, ie);
1200
1201         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1202                                 &count);
1203         if (realm == NULL) {
1204                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1205                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1206                 count = 0;
1207         }
1208
1209         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1210                 for (i = 0; i < count; i++) {
1211                         if (!nai_realm_match(&realm[i], cred->realm))
1212                                 continue;
1213                         eap = nai_realm_find_eap(cred, &realm[i]);
1214                         if (eap)
1215                                 break;
1216                 }
1217                 if (eap)
1218                         break;
1219         }
1220
1221         if (!eap) {
1222                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
1223                         if (realm)
1224                                 nai_realm_free(realm, count);
1225                         return 0;
1226                 }
1227
1228                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1229                            "and EAP method found for " MACSTR,
1230                            MAC2STR(bss->bssid));
1231                 nai_realm_free(realm, count);
1232                 return -1;
1233         }
1234
1235         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1236                    MAC2STR(bss->bssid));
1237
1238         ssid = wpa_config_add_network(wpa_s->conf);
1239         if (ssid == NULL) {
1240                 nai_realm_free(realm, count);
1241                 return -1;
1242         }
1243         ssid->parent_cred = cred;
1244         wpas_notify_network_added(wpa_s, ssid);
1245         wpa_config_set_network_defaults(ssid);
1246         ssid->priority = cred->priority;
1247         ssid->temporary = 1;
1248         ssid->ssid = os_zalloc(ie[1] + 1);
1249         if (ssid->ssid == NULL)
1250                 goto fail;
1251         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1252         ssid->ssid_len = ie[1];
1253
1254         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1255                 goto fail;
1256
1257         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1258                                                      eap->method), 0) < 0)
1259                 goto fail;
1260
1261         switch (eap->method) {
1262         case EAP_TYPE_TTLS:
1263                 if (eap->inner_method) {
1264                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1265                                     eap_get_name(EAP_VENDOR_IETF,
1266                                                  eap->inner_method));
1267                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1268                                 goto fail;
1269                         break;
1270                 }
1271                 switch (eap->inner_non_eap) {
1272                 case NAI_REALM_INNER_NON_EAP_PAP:
1273                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1274                             0)
1275                                 goto fail;
1276                         break;
1277                 case NAI_REALM_INNER_NON_EAP_CHAP:
1278                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1279                             < 0)
1280                                 goto fail;
1281                         break;
1282                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1283                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1284                                            0) < 0)
1285                                 goto fail;
1286                         break;
1287                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1288                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1289                                            0) < 0)
1290                                 goto fail;
1291                         break;
1292                 default:
1293                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1294                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1295                                            0) < 0)
1296                                 goto fail;
1297                         break;
1298                 }
1299                 break;
1300         case EAP_TYPE_PEAP:
1301                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1302                             eap_get_name(EAP_VENDOR_IETF,
1303                                          eap->inner_method ?
1304                                          eap->inner_method :
1305                                          EAP_TYPE_MSCHAPV2));
1306                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1307                         goto fail;
1308                 break;
1309         case EAP_TYPE_TLS:
1310                 break;
1311         }
1312
1313         if (interworking_set_eap_params(ssid, cred,
1314                                         eap->method == EAP_TYPE_TTLS) < 0)
1315                 goto fail;
1316
1317         nai_realm_free(realm, count);
1318
1319         wpa_config_update_prio_list(wpa_s->conf);
1320         interworking_reconnect(wpa_s);
1321
1322         return 0;
1323
1324 fail:
1325         wpas_notify_network_removed(wpa_s, ssid);
1326         wpa_config_remove_network(wpa_s->conf, ssid->id);
1327         nai_realm_free(realm, count);
1328         return -1;
1329 }
1330
1331
1332 static struct wpa_cred * interworking_credentials_available_3gpp(
1333         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1334 {
1335         struct wpa_cred *cred, *selected = NULL;
1336         int ret;
1337
1338 #ifdef INTERWORKING_3GPP
1339         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1340                 return NULL;
1341
1342         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1343                 char *sep;
1344                 const char *imsi;
1345                 int mnc_len;
1346
1347 #ifdef PCSC_FUNCS
1348                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1349                     wpa_s->imsi[0]) {
1350                         imsi = wpa_s->imsi;
1351                         mnc_len = wpa_s->mnc_len;
1352                         goto compare;
1353                 }
1354 #endif /* PCSC_FUNCS */
1355
1356                 if (cred->imsi == NULL || !cred->imsi[0] ||
1357                     cred->milenage == NULL || !cred->milenage[0])
1358                         continue;
1359
1360                 sep = os_strchr(cred->imsi, '-');
1361                 if (sep == NULL ||
1362                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1363                         continue;
1364                 mnc_len = sep - cred->imsi - 3;
1365                 imsi = cred->imsi;
1366
1367 #ifdef PCSC_FUNCS
1368         compare:
1369 #endif /* PCSC_FUNCS */
1370                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1371                            MACSTR, MAC2STR(bss->bssid));
1372                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1373                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1374                 if (ret) {
1375                         if (cred_excluded_ssid(cred, bss))
1376                                 continue;
1377                         if (selected == NULL ||
1378                             selected->priority < cred->priority)
1379                                 selected = cred;
1380                 }
1381         }
1382 #endif /* INTERWORKING_3GPP */
1383         return selected;
1384 }
1385
1386
1387 static struct wpa_cred * interworking_credentials_available_realm(
1388         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1389 {
1390         struct wpa_cred *cred, *selected = NULL;
1391         struct nai_realm *realm;
1392         u16 count, i;
1393
1394         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1395                 return NULL;
1396
1397         if (wpa_s->conf->cred == NULL)
1398                 return NULL;
1399
1400         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1401                    MACSTR, MAC2STR(bss->bssid));
1402         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1403         if (realm == NULL) {
1404                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1405                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1406                 return NULL;
1407         }
1408
1409         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1410                 if (cred->realm == NULL)
1411                         continue;
1412
1413                 for (i = 0; i < count; i++) {
1414                         if (!nai_realm_match(&realm[i], cred->realm))
1415                                 continue;
1416                         if (nai_realm_find_eap(cred, &realm[i])) {
1417                                 if (cred_excluded_ssid(cred, bss))
1418                                         continue;
1419                                 if (selected == NULL ||
1420                                     selected->priority < cred->priority)
1421                                         selected = cred;
1422                                 break;
1423                         }
1424                 }
1425         }
1426
1427         nai_realm_free(realm, count);
1428
1429         return selected;
1430 }
1431
1432
1433 static struct wpa_cred * interworking_credentials_available(
1434         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1435 {
1436         struct wpa_cred *cred, *cred2;
1437
1438         cred = interworking_credentials_available_realm(wpa_s, bss);
1439         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1440         if (cred && cred2 && cred2->priority >= cred->priority)
1441                 cred = cred2;
1442         if (!cred)
1443                 cred = cred2;
1444
1445         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1446                                                                       bss);
1447         if (cred && cred2 && cred2->priority >= cred->priority)
1448                 cred = cred2;
1449         if (!cred)
1450                 cred = cred2;
1451
1452         return cred;
1453 }
1454
1455
1456 static int domain_name_list_contains(struct wpabuf *domain_names,
1457                                      const char *domain)
1458 {
1459         const u8 *pos, *end;
1460         size_t len;
1461
1462         len = os_strlen(domain);
1463         pos = wpabuf_head(domain_names);
1464         end = pos + wpabuf_len(domain_names);
1465
1466         while (pos + 1 < end) {
1467                 if (pos + 1 + pos[0] > end)
1468                         break;
1469
1470                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1471                                   pos + 1, pos[0]);
1472                 if (pos[0] == len &&
1473                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1474                         return 1;
1475
1476                 pos += 1 + pos[0];
1477         }
1478
1479         return 0;
1480 }
1481
1482
1483 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
1484                               struct wpa_cred *cred,
1485                               struct wpabuf *domain_names)
1486 {
1487 #ifdef INTERWORKING_3GPP
1488         char nai[100], *realm;
1489
1490         char *imsi = NULL;
1491         int mnc_len = 0;
1492         if (cred->imsi)
1493                 imsi = cred->imsi;
1494 #ifdef CONFIG_PCSC
1495         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1496                  wpa_s->scard && wpa_s->imsi[0]) {
1497                 imsi = wpa_s->imsi;
1498                 mnc_len = wpa_s->mnc_len;
1499         }
1500 #endif /* CONFIG_PCSC */
1501         if (domain_names &&
1502             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
1503                 realm = os_strchr(nai, '@');
1504                 if (realm)
1505                         realm++;
1506                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1507                            "with SIM/USIM domain %s", realm);
1508                 if (realm &&
1509                     domain_name_list_contains(domain_names, realm))
1510                         return 1;
1511         }
1512 #endif /* INTERWORKING_3GPP */
1513
1514         if (domain_names == NULL || cred->domain == NULL)
1515                 return 0;
1516
1517         wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1518                    "home SP FQDN %s", cred->domain);
1519         if (domain_name_list_contains(domain_names, cred->domain))
1520                 return 1;
1521
1522         return 0;
1523 }
1524
1525
1526 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1527                                 struct wpabuf *domain_names)
1528 {
1529         struct wpa_cred *cred;
1530
1531         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1532                 return -1;
1533
1534         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1535                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
1536                 if (res)
1537                         return res;
1538         }
1539
1540         return 0;
1541 }
1542
1543
1544 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1545 {
1546         struct wpa_bss *bss;
1547         struct wpa_ssid *ssid;
1548
1549         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1550                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1551                         if (wpas_network_disabled(wpa_s, ssid) ||
1552                             ssid->mode != WPAS_MODE_INFRA)
1553                                 continue;
1554                         if (ssid->ssid_len != bss->ssid_len ||
1555                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1556                             0)
1557                                 continue;
1558                         /*
1559                          * TODO: Consider more accurate matching of security
1560                          * configuration similarly to what is done in events.c
1561                          */
1562                         return 1;
1563                 }
1564         }
1565
1566         return 0;
1567 }
1568
1569
1570 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1571 {
1572         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1573         int selected_prio = -999999, selected_home_prio = -999999;
1574         unsigned int count = 0;
1575         const char *type;
1576         int res;
1577         struct wpa_cred *cred;
1578
1579         wpa_s->network_select = 0;
1580
1581         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1582                 cred = interworking_credentials_available(wpa_s, bss);
1583                 if (!cred)
1584                         continue;
1585                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1586                         /*
1587                          * We currently support only HS 2.0 networks and those
1588                          * are required to use WPA2-Enterprise.
1589                          */
1590                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1591                                    "with " MACSTR " but network does not use "
1592                                    "RSN", MAC2STR(bss->bssid));
1593                         continue;
1594                 }
1595                 count++;
1596                 res = interworking_home_sp(wpa_s, bss->anqp ?
1597                                            bss->anqp->domain_name : NULL);
1598                 if (res > 0)
1599                         type = "home";
1600                 else if (res == 0)
1601                         type = "roaming";
1602                 else
1603                         type = "unknown";
1604                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1605                         MAC2STR(bss->bssid), type);
1606                 if (wpa_s->auto_select ||
1607                     (wpa_s->conf->auto_interworking &&
1608                      wpa_s->auto_network_select)) {
1609                         if (selected == NULL ||
1610                             cred->priority > selected_prio) {
1611                                 selected = bss;
1612                                 selected_prio = cred->priority;
1613                         }
1614                         if (res > 0 &&
1615                             (selected_home == NULL ||
1616                              cred->priority > selected_home_prio)) {
1617                                 selected_home = bss;
1618                                 selected_home_prio = cred->priority;
1619                         }
1620                 }
1621         }
1622
1623         if (selected_home && selected_home != selected &&
1624             selected_home_prio >= selected_prio) {
1625                 /* Prefer network operated by the Home SP */
1626                 selected = selected_home;
1627         }
1628
1629         if (count == 0) {
1630                 /*
1631                  * No matching network was found based on configured
1632                  * credentials. Check whether any of the enabled network blocks
1633                  * have matching APs.
1634                  */
1635                 if (interworking_find_network_match(wpa_s)) {
1636                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1637                                    "match for enabled network configurations");
1638                         if (wpa_s->auto_select)
1639                                 interworking_reconnect(wpa_s);
1640                         return;
1641                 }
1642
1643                 if (wpa_s->auto_network_select) {
1644                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1645                                    "scanning after ANQP fetch");
1646                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1647                                                 0);
1648                         return;
1649                 }
1650
1651                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1652                         "with matching credentials found");
1653         }
1654
1655         if (selected)
1656                 interworking_connect(wpa_s, selected);
1657 }
1658
1659
1660 static struct wpa_bss_anqp *
1661 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1662 {
1663         struct wpa_bss *other;
1664
1665         if (is_zero_ether_addr(bss->hessid))
1666                 return NULL; /* Cannot be in the same homegenous ESS */
1667
1668         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1669                 if (other == bss)
1670                         continue;
1671                 if (other->anqp == NULL)
1672                         continue;
1673                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1674                         continue;
1675                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1676                         continue;
1677                 if (bss->ssid_len != other->ssid_len ||
1678                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1679                         continue;
1680
1681                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1682                            "already fetched BSSID " MACSTR " and " MACSTR,
1683                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1684                 other->anqp->users++;
1685                 return other->anqp;
1686         }
1687
1688         return NULL;
1689 }
1690
1691
1692 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1693 {
1694         struct wpa_bss *bss;
1695         int found = 0;
1696         const u8 *ie;
1697
1698         if (!wpa_s->fetch_anqp_in_progress)
1699                 return;
1700
1701         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1702                 if (!(bss->caps & IEEE80211_CAP_ESS))
1703                         continue;
1704                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1705                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1706                         continue; /* AP does not support Interworking */
1707
1708                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1709                         if (bss->anqp == NULL) {
1710                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1711                                                                          bss);
1712                                 if (bss->anqp) {
1713                                         /* Shared data already fetched */
1714                                         continue;
1715                                 }
1716                                 bss->anqp = wpa_bss_anqp_alloc();
1717                                 if (bss->anqp == NULL)
1718                                         break;
1719                         }
1720                         found++;
1721                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1722                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1723                                 MACSTR, MAC2STR(bss->bssid));
1724                         interworking_anqp_send_req(wpa_s, bss);
1725                         break;
1726                 }
1727         }
1728
1729         if (found == 0) {
1730                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1731                 wpa_s->fetch_anqp_in_progress = 0;
1732                 if (wpa_s->network_select)
1733                         interworking_select_network(wpa_s);
1734         }
1735 }
1736
1737
1738 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1739 {
1740         struct wpa_bss *bss;
1741
1742         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1743                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1744
1745         wpa_s->fetch_anqp_in_progress = 1;
1746         interworking_next_anqp_fetch(wpa_s);
1747 }
1748
1749
1750 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1751 {
1752         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1753                 return 0;
1754
1755         wpa_s->network_select = 0;
1756         wpa_s->fetch_all_anqp = 1;
1757
1758         interworking_start_fetch_anqp(wpa_s);
1759
1760         return 0;
1761 }
1762
1763
1764 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1765 {
1766         if (!wpa_s->fetch_anqp_in_progress)
1767                 return;
1768
1769         wpa_s->fetch_anqp_in_progress = 0;
1770 }
1771
1772
1773 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1774                   u16 info_ids[], size_t num_ids)
1775 {
1776         struct wpabuf *buf;
1777         int ret = 0;
1778         int freq;
1779         struct wpa_bss *bss;
1780         int res;
1781
1782         freq = wpa_s->assoc_freq;
1783         bss = wpa_bss_get_bssid(wpa_s, dst);
1784         if (bss) {
1785                 wpa_bss_anqp_unshare_alloc(bss);
1786                 freq = bss->freq;
1787         }
1788         if (freq <= 0)
1789                 return -1;
1790
1791         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1792                    MAC2STR(dst), (unsigned int) num_ids);
1793
1794         buf = anqp_build_req(info_ids, num_ids, NULL);
1795         if (buf == NULL)
1796                 return -1;
1797
1798         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1799         if (res < 0) {
1800                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1801                 ret = -1;
1802         } else
1803                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1804                            "%u", res);
1805
1806         wpabuf_free(buf);
1807         return ret;
1808 }
1809
1810
1811 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1812                                             const u8 *sa, u16 info_id,
1813                                             const u8 *data, size_t slen)
1814 {
1815         const u8 *pos = data;
1816         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1817         struct wpa_bss_anqp *anqp = NULL;
1818 #ifdef CONFIG_HS20
1819         u8 type;
1820 #endif /* CONFIG_HS20 */
1821
1822         if (bss)
1823                 anqp = bss->anqp;
1824
1825         switch (info_id) {
1826         case ANQP_CAPABILITY_LIST:
1827                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1828                         " ANQP Capability list", MAC2STR(sa));
1829                 break;
1830         case ANQP_VENUE_NAME:
1831                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1832                         " Venue Name", MAC2STR(sa));
1833                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1834                 if (anqp) {
1835                         wpabuf_free(anqp->venue_name);
1836                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1837                 }
1838                 break;
1839         case ANQP_NETWORK_AUTH_TYPE:
1840                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1841                         " Network Authentication Type information",
1842                         MAC2STR(sa));
1843                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1844                                   "Type", pos, slen);
1845                 if (anqp) {
1846                         wpabuf_free(anqp->network_auth_type);
1847                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1848                 }
1849                 break;
1850         case ANQP_ROAMING_CONSORTIUM:
1851                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1852                         " Roaming Consortium list", MAC2STR(sa));
1853                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1854                                   pos, slen);
1855                 if (anqp) {
1856                         wpabuf_free(anqp->roaming_consortium);
1857                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1858                 }
1859                 break;
1860         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1861                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1862                         " IP Address Type Availability information",
1863                         MAC2STR(sa));
1864                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1865                             pos, slen);
1866                 if (anqp) {
1867                         wpabuf_free(anqp->ip_addr_type_availability);
1868                         anqp->ip_addr_type_availability =
1869                                 wpabuf_alloc_copy(pos, slen);
1870                 }
1871                 break;
1872         case ANQP_NAI_REALM:
1873                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1874                         " NAI Realm list", MAC2STR(sa));
1875                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1876                 if (anqp) {
1877                         wpabuf_free(anqp->nai_realm);
1878                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1879                 }
1880                 break;
1881         case ANQP_3GPP_CELLULAR_NETWORK:
1882                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1883                         " 3GPP Cellular Network information", MAC2STR(sa));
1884                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1885                                   pos, slen);
1886                 if (anqp) {
1887                         wpabuf_free(anqp->anqp_3gpp);
1888                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1889                 }
1890                 break;
1891         case ANQP_DOMAIN_NAME:
1892                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1893                         " Domain Name list", MAC2STR(sa));
1894                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1895                 if (anqp) {
1896                         wpabuf_free(anqp->domain_name);
1897                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1898                 }
1899                 break;
1900         case ANQP_VENDOR_SPECIFIC:
1901                 if (slen < 3)
1902                         return;
1903
1904                 switch (WPA_GET_BE24(pos)) {
1905 #ifdef CONFIG_HS20
1906                 case OUI_WFA:
1907                         pos += 3;
1908                         slen -= 3;
1909
1910                         if (slen < 1)
1911                                 return;
1912                         type = *pos++;
1913                         slen--;
1914
1915                         switch (type) {
1916                         case HS20_ANQP_OUI_TYPE:
1917                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1918                                                              slen);
1919                                 break;
1920                         default:
1921                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1922                                            "vendor type %u", type);
1923                                 break;
1924                         }
1925                         break;
1926 #endif /* CONFIG_HS20 */
1927                 default:
1928                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1929                                    "vendor-specific ANQP OUI %06x",
1930                                    WPA_GET_BE24(pos));
1931                         return;
1932                 }
1933                 break;
1934         default:
1935                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1936                            "%u", info_id);
1937                 break;
1938         }
1939 }
1940
1941
1942 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1943                   enum gas_query_result result,
1944                   const struct wpabuf *adv_proto,
1945                   const struct wpabuf *resp, u16 status_code)
1946 {
1947         struct wpa_supplicant *wpa_s = ctx;
1948         const u8 *pos;
1949         const u8 *end;
1950         u16 info_id;
1951         u16 slen;
1952
1953         if (result != GAS_QUERY_SUCCESS)
1954                 return;
1955
1956         pos = wpabuf_head(adv_proto);
1957         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1958             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1959                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1960                            "Protocol in response");
1961                 return;
1962         }
1963
1964         pos = wpabuf_head(resp);
1965         end = pos + wpabuf_len(resp);
1966
1967         while (pos < end) {
1968                 if (pos + 4 > end) {
1969                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1970                         break;
1971                 }
1972                 info_id = WPA_GET_LE16(pos);
1973                 pos += 2;
1974                 slen = WPA_GET_LE16(pos);
1975                 pos += 2;
1976                 if (pos + slen > end) {
1977                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1978                                    "for Info ID %u", info_id);
1979                         break;
1980                 }
1981                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1982                                                 slen);
1983                 pos += slen;
1984         }
1985 }
1986
1987
1988 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1989                                           struct wpa_scan_results *scan_res)
1990 {
1991         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1992                    "ANQP fetch");
1993         interworking_start_fetch_anqp(wpa_s);
1994 }
1995
1996
1997 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1998 {
1999         interworking_stop_fetch_anqp(wpa_s);
2000         wpa_s->network_select = 1;
2001         wpa_s->auto_network_select = 0;
2002         wpa_s->auto_select = !!auto_select;
2003         wpa_s->fetch_all_anqp = 0;
2004         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2005                    "selection");
2006         wpa_s->scan_res_handler = interworking_scan_res_handler;
2007         wpa_s->scan_req = MANUAL_SCAN_REQ;
2008         wpa_supplicant_req_scan(wpa_s, 0, 0);
2009
2010         return 0;
2011 }
2012
2013
2014 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2015                         enum gas_query_result result,
2016                         const struct wpabuf *adv_proto,
2017                         const struct wpabuf *resp, u16 status_code)
2018 {
2019         struct wpa_supplicant *wpa_s = ctx;
2020
2021         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2022                 " dialog_token=%d status_code=%d resp_len=%d",
2023                 MAC2STR(addr), dialog_token, status_code,
2024                 resp ? (int) wpabuf_len(resp) : -1);
2025         if (!resp)
2026                 return;
2027
2028         wpabuf_free(wpa_s->last_gas_resp);
2029         wpa_s->last_gas_resp = wpabuf_dup(resp);
2030         if (wpa_s->last_gas_resp == NULL)
2031                 return;
2032         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2033         wpa_s->last_gas_dialog_token = dialog_token;
2034 }
2035
2036
2037 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2038                      const struct wpabuf *adv_proto,
2039                      const struct wpabuf *query)
2040 {
2041         struct wpabuf *buf;
2042         int ret = 0;
2043         int freq;
2044         struct wpa_bss *bss;
2045         int res;
2046         size_t len;
2047         u8 query_resp_len_limit = 0, pame_bi = 0;
2048
2049         freq = wpa_s->assoc_freq;
2050         bss = wpa_bss_get_bssid(wpa_s, dst);
2051         if (bss)
2052                 freq = bss->freq;
2053         if (freq <= 0)
2054                 return -1;
2055
2056         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2057                    MAC2STR(dst), freq);
2058         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2059         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2060
2061         len = 3 + wpabuf_len(adv_proto) + 2;
2062         if (query)
2063                 len += wpabuf_len(query);
2064         buf = gas_build_initial_req(0, len);
2065         if (buf == NULL)
2066                 return -1;
2067
2068         /* Advertisement Protocol IE */
2069         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2070         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2071         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2072                       (pame_bi ? 0x80 : 0));
2073         wpabuf_put_buf(buf, adv_proto);
2074
2075         /* GAS Query */
2076         if (query) {
2077                 wpabuf_put_le16(buf, wpabuf_len(query));
2078                 wpabuf_put_buf(buf, query);
2079         } else
2080                 wpabuf_put_le16(buf, 0);
2081
2082         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2083         if (res < 0) {
2084                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2085                 ret = -1;
2086         } else
2087                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2088                            "%u", res);
2089
2090         wpabuf_free(buf);
2091         return ret;
2092 }