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 "utils/eloop.h"
  17 #include "drivers/driver.h"
  18 #include "eap_common/eap_defs.h"
  19 #include "eap_peer/eap.h"
  20 #include "eap_peer/eap_methods.h"
  21 #include "wpa_supplicant_i.h"
  22 #include "config.h"
  23 #include "config_ssid.h"
  24 #include "bss.h"
  25 #include "scan.h"
  26 #include "notify.h"
  27 #include "gas_query.h"
  28 #include "hs20_supplicant.h"
  29 #include "interworking.h"
  30
  31
  32 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  33 #define INTERWORKING_3GPP
  34 #else
  35 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  36 #define INTERWORKING_3GPP
  37 #else
  38 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  39 #define INTERWORKING_3GPP
  40 #endif
  41 #endif
  42 #endif
  43
  44 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  45 static struct wpa_cred * interworking_credentials_available_realm(
  46         struct wpa_supplicant *wpa_s, struct wpa_bss *bss);
  47 static struct wpa_cred * interworking_credentials_available_3gpp(
  48         struct wpa_supplicant *wpa_s, struct wpa_bss *bss);
  49
  50
  51 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  52 {
  53         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  54                 wpa_supplicant_cancel_sched_scan(wpa_s);
  55                 wpa_supplicant_deauthenticate(wpa_s,
  56                                               WLAN_REASON_DEAUTH_LEAVING);
  57         }
  58         wpa_s->disconnected = 0;
  59         wpa_s->reassociate = 1;
  60
  61         if (wpa_supplicant_fast_associate(wpa_s) >= 0)
  62                 return;
  63
  64         wpa_supplicant_req_scan(wpa_s, 0, 0);
  65 }
  66
  67
  68 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  69                                       struct wpabuf *extra)
  70 {
  71         struct wpabuf *buf;
  72         size_t i;
  73         u8 *len_pos;
  74
  75         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  76                                          (extra ? wpabuf_len(extra) : 0));
  77         if (buf == NULL)
  78                 return NULL;
  79
  80         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  81         for (i = 0; i < num_ids; i++)
  82                 wpabuf_put_le16(buf, info_ids[i]);
  83         gas_anqp_set_element_len(buf, len_pos);
  84         if (extra)
  85                 wpabuf_put_buf(buf, extra);
  86
  87         gas_anqp_set_len(buf);
  88
  89         return buf;
  90 }
  91
  92
  93 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  94                                       u8 dialog_token,
  95                                       enum gas_query_result result,
  96                                       const struct wpabuf *adv_proto,
  97                                       const struct wpabuf *resp,
  98                                       u16 status_code)
  99 {
 100         struct wpa_supplicant *wpa_s = ctx;
 101
 102         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 103                      status_code);
 104         interworking_next_anqp_fetch(wpa_s);
 105 }
 106
 107
 108 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 109 {
 110         struct wpa_cred *cred;
 111
 112         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 113                 if (cred->roaming_consortium_len)
 114                         return 1;
 115         }
 116         return 0;
 117 }
 118
 119
 120 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 121 {
 122         struct wpa_cred *cred;
 123
 124         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 125                 if (cred->pcsc || cred->imsi)
 126                         return 1;
 127         }
 128         return 0;
 129 }
 130
 131
 132 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 133 {
 134         struct wpa_cred *cred;
 135
 136         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 137                 if (cred->pcsc || cred->imsi)
 138                         continue;
 139                 if (!cred->eap_method)
 140                         return 1;
 141                 if (cred->realm && cred->roaming_consortium_len == 0)
 142                         return 1;
 143         }
 144         return 0;
 145 }
 146
 147
 148 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 149 {
 150         struct wpa_cred *cred;
 151
 152         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 153                 if (cred->domain || cred->pcsc || cred->imsi)
 154                         return 1;
 155         }
 156         return 0;
 157 }
 158
 159
 160 static int additional_roaming_consortiums(struct wpa_bss *bss)
 161 {
 162         const u8 *ie;
 163         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 164         if (ie == NULL || ie[1] == 0)
 165                 return 0;
 166         return ie[2]; /* Number of ANQP OIs */
 167 }
 168
 169
 170 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 171 {
 172         struct wpa_supplicant *wpa_s = eloop_ctx;
 173         interworking_next_anqp_fetch(wpa_s);
 174 }
 175
 176
 177 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 178                                       struct wpa_bss *bss)
 179 {
 180         struct wpabuf *buf;
 181         int ret = 0;
 182         int res;
 183         u16 info_ids[8];
 184         size_t num_info_ids = 0;
 185         struct wpabuf *extra = NULL;
 186         int all = wpa_s->fetch_all_anqp;
 187
 188         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 189                    MAC2STR(bss->bssid));
 190         wpa_s->interworking_gas_bss = bss;
 191
 192         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 193         if (all) {
 194                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 195                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 196         }
 197         if (all || (cred_with_roaming_consortium(wpa_s) &&
 198                     additional_roaming_consortiums(bss)))
 199                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 200         if (all)
 201                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 202         if (all || cred_with_nai_realm(wpa_s))
 203                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 204         if (all || cred_with_3gpp(wpa_s))
 205                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 206         if (all || cred_with_domain(wpa_s))
 207                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 208         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 209                     (u8 *) info_ids, num_info_ids * 2);
 210
 211 #ifdef CONFIG_HS20
 212         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 213                 u8 *len_pos;
 214
 215                 extra = wpabuf_alloc(100);
 216                 if (!extra)
 217                         return -1;
 218
 219                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 220                 wpabuf_put_be24(extra, OUI_WFA);
 221                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 222                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 223                 wpabuf_put_u8(extra, 0); /* Reserved */
 224                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 225                 if (all) {
 226                         wpabuf_put_u8(extra,
 227                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 228                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 229                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 230                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 231                 }
 232                 gas_anqp_set_element_len(extra, len_pos);
 233         }
 234 #endif /* CONFIG_HS20 */
 235
 236         buf = anqp_build_req(info_ids, num_info_ids, extra);
 237         wpabuf_free(extra);
 238         if (buf == NULL)
 239                 return -1;
 240
 241         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 242                             interworking_anqp_resp_cb, wpa_s);
 243         if (res < 0) {
 244                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 245                 ret = -1;
 246                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 247                                        NULL);
 248         } else
 249                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 250                            "%u", res);
 251
 252         wpabuf_free(buf);
 253         return ret;
 254 }
 255
 256
 257 struct nai_realm_eap {
 258         u8 method;
 259         u8 inner_method;
 260         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 261         u8 cred_type;
 262         u8 tunneled_cred_type;
 263 };
 264
 265 struct nai_realm {
 266         u8 encoding;
 267         char *realm;
 268         u8 eap_count;
 269         struct nai_realm_eap *eap;
 270 };
 271
 272
 273 static void nai_realm_free(struct nai_realm *realms, u16 count)
 274 {
 275         u16 i;
 276
 277         if (realms == NULL)
 278                 return;
 279         for (i = 0; i < count; i++) {
 280                 os_free(realms[i].eap);
 281                 os_free(realms[i].realm);
 282         }
 283         os_free(realms);
 284 }
 285
 286
 287 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 288                                       const u8 *end)
 289 {
 290         u8 elen, auth_count, a;
 291         const u8 *e_end;
 292
 293         if (pos + 3 > end) {
 294                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 295                 return NULL;
 296         }
 297
 298         elen = *pos++;
 299         if (pos + elen > end || elen < 2) {
 300                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 301                 return NULL;
 302         }
 303         e_end = pos + elen;
 304         e->method = *pos++;
 305         auth_count = *pos++;
 306         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 307                    elen, e->method, auth_count);
 308
 309         for (a = 0; a < auth_count; a++) {
 310                 u8 id, len;
 311
 312                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 313                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 314                                    "Parameter subfield");
 315                         return NULL;
 316                 }
 317
 318                 id = *pos++;
 319                 len = *pos++;
 320
 321                 switch (id) {
 322                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 323                         if (len < 1)
 324                                 break;
 325                         e->inner_non_eap = *pos;
 326                         if (e->method != EAP_TYPE_TTLS)
 327                                 break;
 328                         switch (*pos) {
 329                         case NAI_REALM_INNER_NON_EAP_PAP:
 330                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 331                                 break;
 332                         case NAI_REALM_INNER_NON_EAP_CHAP:
 333                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 334                                 break;
 335                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 336                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 337                                 break;
 338                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 339                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 340                                 break;
 341                         }
 342                         break;
 343                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 344                         if (len < 1)
 345                                 break;
 346                         e->inner_method = *pos;
 347                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 348                                    e->inner_method);
 349                         break;
 350                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 351                         if (len < 1)
 352                                 break;
 353                         e->cred_type = *pos;
 354                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 355                                    e->cred_type);
 356                         break;
 357                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 358                         if (len < 1)
 359                                 break;
 360                         e->tunneled_cred_type = *pos;
 361                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 362                                    "Type: %u", e->tunneled_cred_type);
 363                         break;
 364                 default:
 365                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 366                                    "Parameter: id=%u len=%u", id, len);
 367                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 368                                     "Value", pos, len);
 369                         break;
 370                 }
 371
 372                 pos += len;
 373         }
 374
 375         return e_end;
 376 }
 377
 378
 379 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 380                                         const u8 *end)
 381 {
 382         u16 len;
 383         const u8 *f_end;
 384         u8 realm_len, e;
 385
 386         if (end - pos < 4) {
 387                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 388                            "fixed fields");
 389                 return NULL;
 390         }
 391
 392         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 393         pos += 2;
 394         if (pos + len > end || len < 3) {
 395                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 396                            "(len=%u; left=%u)",
 397                            len, (unsigned int) (end - pos));
 398                 return NULL;
 399         }
 400         f_end = pos + len;
 401
 402         r->encoding = *pos++;
 403         realm_len = *pos++;
 404         if (pos + realm_len > f_end) {
 405                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 406                            "(len=%u; left=%u)",
 407                            realm_len, (unsigned int) (f_end - pos));
 408                 return NULL;
 409         }
 410         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 411         r->realm = dup_binstr(pos, realm_len);
 412         if (r->realm == NULL)
 413                 return NULL;
 414         pos += realm_len;
 415
 416         if (pos + 1 > f_end) {
 417                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 418                 return NULL;
 419         }
 420         r->eap_count = *pos++;
 421         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 422         if (pos + r->eap_count * 3 > f_end) {
 423                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 424                 return NULL;
 425         }
 426         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 427         if (r->eap == NULL)
 428                 return NULL;
 429
 430         for (e = 0; e < r->eap_count; e++) {
 431                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 432                 if (pos == NULL)
 433                         return NULL;
 434         }
 435
 436         return f_end;
 437 }
 438
 439
 440 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 441 {
 442         struct nai_realm *realm;
 443         const u8 *pos, *end;
 444         u16 i, num;
 445
 446         if (anqp == NULL || wpabuf_len(anqp) < 2)
 447                 return NULL;
 448
 449         pos = wpabuf_head_u8(anqp);
 450         end = pos + wpabuf_len(anqp);
 451         num = WPA_GET_LE16(pos);
 452         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 453         pos += 2;
 454
 455         if (num * 5 > end - pos) {
 456                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 457                            "enough data (%u octets) for that many realms",
 458                            num, (unsigned int) (end - pos));
 459                 return NULL;
 460         }
 461
 462         realm = os_calloc(num, sizeof(struct nai_realm));
 463         if (realm == NULL)
 464                 return NULL;
 465
 466         for (i = 0; i < num; i++) {
 467                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 468                 if (pos == NULL) {
 469                         nai_realm_free(realm, num);
 470                         return NULL;
 471                 }
 472         }
 473
 474         *count = num;
 475         return realm;
 476 }
 477
 478
 479 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 480 {
 481         char *tmp, *pos, *end;
 482         int match = 0;
 483
 484         if (realm->realm == NULL || home_realm == NULL)
 485                 return 0;
 486
 487         if (os_strchr(realm->realm, ';') == NULL)
 488                 return os_strcasecmp(realm->realm, home_realm) == 0;
 489
 490         tmp = os_strdup(realm->realm);
 491         if (tmp == NULL)
 492                 return 0;
 493
 494         pos = tmp;
 495         while (*pos) {
 496                 end = os_strchr(pos, ';');
 497                 if (end)
 498                         *end = '\0';
 499                 if (os_strcasecmp(pos, home_realm) == 0) {
 500                         match = 1;
 501                         break;
 502                 }
 503                 if (end == NULL)
 504                         break;
 505                 pos = end + 1;
 506         }
 507
 508         os_free(tmp);
 509
 510         return match;
 511 }
 512
 513
 514 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 515 {
 516         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 517                 return 0; /* method not supported */
 518
 519         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 520                 /* Only tunneled methods with username/password supported */
 521                 return 0;
 522         }
 523
 524         if (eap->method == EAP_TYPE_PEAP) {
 525                 if (eap->inner_method &&
 526                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 527                         return 0;
 528                 if (!eap->inner_method &&
 529                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
 530                         return 0;
 531         }
 532
 533         if (eap->method == EAP_TYPE_TTLS) {
 534                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 535                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 536                 if (eap->inner_method &&
 537                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 538                         return 0;
 539                 if (eap->inner_non_eap &&
 540                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 541                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 542                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 543                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 544                         return 0;
 545         }
 546
 547         if (eap->inner_method &&
 548             eap->inner_method != EAP_TYPE_GTC &&
 549             eap->inner_method != EAP_TYPE_MSCHAPV2)
 550                 return 0;
 551
 552         return 1;
 553 }
 554
 555
 556 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 557 {
 558         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 559                 return 0; /* method not supported */
 560
 561         if (eap->method != EAP_TYPE_TLS) {
 562                 /* Only EAP-TLS supported for credential authentication */
 563                 return 0;
 564         }
 565
 566         return 1;
 567 }
 568
 569
 570 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 571                                                  struct nai_realm *realm)
 572 {
 573         u8 e;
 574
 575         if (cred == NULL ||
 576             cred->username == NULL ||
 577             cred->username[0] == '\0' ||
 578             ((cred->password == NULL ||
 579               cred->password[0] == '\0') &&
 580              (cred->private_key == NULL ||
 581               cred->private_key[0] == '\0')))
 582                 return NULL;
 583
 584         for (e = 0; e < realm->eap_count; e++) {
 585                 struct nai_realm_eap *eap = &realm->eap[e];
 586                 if (cred->password && cred->password[0] &&
 587                     nai_realm_cred_username(eap))
 588                         return eap;
 589                 if (cred->private_key && cred->private_key[0] &&
 590                     nai_realm_cred_cert(eap))
 591                         return eap;
 592         }
 593
 594         return NULL;
 595 }
 596
 597
 598 #ifdef INTERWORKING_3GPP
 599
 600 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 601 {
 602         u8 plmn[3], plmn2[3];
 603         const u8 *pos, *end;
 604         u8 udhl;
 605
 606         /*
 607          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 608          * operator is allowed to include only two digits of the MNC, so allow
 609          * matches based on both two and three digit MNC assumptions. Since some
 610          * SIM/USIM cards may not expose MNC length conveniently, we may be
 611          * provided the default MNC length 3 here and as such, checking with MNC
 612          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 613          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 614          * with otherwise matching values would not be good idea in general, so
 615          * this should not result in selecting incorrect networks.
 616          */
 617         /* Match with 3 digit MNC */
 618         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 619         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 620         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 621         /* Match with 2 digit MNC */
 622         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 623         plmn2[1] = (imsi[2] - '0') | 0xf0;
 624         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 625
 626         if (anqp == NULL)
 627                 return 0;
 628         pos = wpabuf_head_u8(anqp);
 629         end = pos + wpabuf_len(anqp);
 630         if (pos + 2 > end)
 631                 return 0;
 632         if (*pos != 0) {
 633                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 634                 return 0;
 635         }
 636         pos++;
 637         udhl = *pos++;
 638         if (pos + udhl > end) {
 639                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 640                 return 0;
 641         }
 642         end = pos + udhl;
 643
 644         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 645                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 646                    imsi, mnc_len);
 647
 648         while (pos + 2 <= end) {
 649                 u8 iei, len;
 650                 const u8 *l_end;
 651                 iei = *pos++;
 652                 len = *pos++ & 0x7f;
 653                 if (pos + len > end)
 654                         break;
 655                 l_end = pos + len;
 656
 657                 if (iei == 0 && len > 0) {
 658                         /* PLMN List */
 659                         u8 num, i;
 660                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 661                                     pos, len);
 662                         num = *pos++;
 663                         for (i = 0; i < num; i++) {
 664                                 if (pos + 3 > l_end)
 665                                         break;
 666                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 667                                     os_memcmp(pos, plmn2, 3) == 0)
 668                                         return 1; /* Found matching PLMN */
 669                                 pos += 3;
 670                         }
 671                 } else {
 672                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 673                                     pos, len);
 674                 }
 675
 676                 pos = l_end;
 677         }
 678
 679         return 0;
 680 }
 681
 682
 683 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 684                           size_t mnc_len, char prefix)
 685 {
 686         const char *sep, *msin;
 687         char *end, *pos;
 688         size_t msin_len, plmn_len;
 689
 690         /*
 691          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 692          * Root NAI:
 693          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 694          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 695          */
 696
 697         if (imsi == NULL || os_strlen(imsi) > 16) {
 698                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 699                 return -1;
 700         }
 701         sep = os_strchr(imsi, '-');
 702         if (sep) {
 703                 plmn_len = sep - imsi;
 704                 msin = sep + 1;
 705         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 706                 plmn_len = 3 + mnc_len;
 707                 msin = imsi + plmn_len;
 708         } else
 709                 return -1;
 710         if (plmn_len != 5 && plmn_len != 6)
 711                 return -1;
 712         msin_len = os_strlen(msin);
 713
 714         pos = nai;
 715         end = nai + nai_len;
 716         if (prefix)
 717                 *pos++ = prefix;
 718         os_memcpy(pos, imsi, plmn_len);
 719         pos += plmn_len;
 720         os_memcpy(pos, msin, msin_len);
 721         pos += msin_len;
 722         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 723         if (plmn_len == 5) {
 724                 *pos++ = '0';
 725                 *pos++ = imsi[3];
 726                 *pos++ = imsi[4];
 727         } else {
 728                 *pos++ = imsi[3];
 729                 *pos++ = imsi[4];
 730                 *pos++ = imsi[5];
 731         }
 732         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 733                            imsi[0], imsi[1], imsi[2]);
 734
 735         return 0;
 736 }
 737
 738
 739 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 740 {
 741         char nai[100];
 742         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 743                 return -1;
 744         return wpa_config_set_quoted(ssid, "identity", nai);
 745 }
 746
 747 #endif /* INTERWORKING_3GPP */
 748
 749
 750 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 751                                         struct wpa_ssid *ssid)
 752 {
 753         if (wpa_config_set(ssid, "key_mgmt",
 754                            wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 755                            "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0)
 756                 return -1;
 757         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 758                 return -1;
 759         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 760                 return -1;
 761         return 0;
 762 }
 763
 764
 765 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 766                                      struct wpa_cred *cred,
 767                                      struct wpa_bss *bss)
 768 {
 769 #ifdef INTERWORKING_3GPP
 770         struct wpa_ssid *ssid;
 771         const u8 *ie;
 772         int eap_type;
 773         int res;
 774         char prefix;
 775
 776         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 777                 return -1;
 778
 779         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 780         if (ie == NULL)
 781                 return -1;
 782         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 783                    MAC2STR(bss->bssid));
 784
 785         ssid = wpa_config_add_network(wpa_s->conf);
 786         if (ssid == NULL)
 787                 return -1;
 788         ssid->parent_cred = cred;
 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(wpa_s, 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 int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
 948 {
 949         size_t i;
 950
 951         if (!cred->excluded_ssid)
 952                 return 0;
 953
 954         for (i = 0; i < cred->num_excluded_ssid; i++) {
 955                 struct excluded_ssid *e = &cred->excluded_ssid[i];
 956                 if (bss->ssid_len == e->ssid_len &&
 957                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
 958                         return 1;
 959         }
 960
 961         return 0;
 962 }
 963
 964
 965 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 966         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 967 {
 968         struct wpa_cred *cred, *selected = NULL;
 969         const u8 *ie;
 970
 971         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 972
 973         if (ie == NULL &&
 974             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 975                 return NULL;
 976
 977         if (wpa_s->conf->cred == NULL)
 978                 return NULL;
 979
 980         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 981                 if (cred->roaming_consortium_len == 0)
 982                         continue;
 983
 984                 if (!roaming_consortium_match(ie,
 985                                               bss->anqp ?
 986                                               bss->anqp->roaming_consortium :
 987                                               NULL,
 988                                               cred->roaming_consortium,
 989                                               cred->roaming_consortium_len))
 990                         continue;
 991
 992                 if (cred_excluded_ssid(cred, bss))
 993                         continue;
 994
 995                 if (selected == NULL ||
 996                     selected->priority < cred->priority)
 997                         selected = cred;
 998         }
 999
1000         return selected;
1001 }
1002
1003
1004 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1005                                        struct wpa_cred *cred, int ttls)
1006 {
1007         if (cred->eap_method) {
1008                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1009                         cred->eap_method->method == EAP_TYPE_TTLS;
1010
1011                 os_free(ssid->eap.eap_methods);
1012                 ssid->eap.eap_methods =
1013                         os_malloc(sizeof(struct eap_method_type) * 2);
1014                 if (ssid->eap.eap_methods == NULL)
1015                         return -1;
1016                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1017                           sizeof(*cred->eap_method));
1018                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1019                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1020         }
1021
1022         if (ttls && cred->username && cred->username[0]) {
1023                 const char *pos;
1024                 char *anon;
1025                 /* Use anonymous NAI in Phase 1 */
1026                 pos = os_strchr(cred->username, '@');
1027                 if (pos) {
1028                         size_t buflen = 9 + os_strlen(pos) + 1;
1029                         anon = os_malloc(buflen);
1030                         if (anon == NULL)
1031                                 return -1;
1032                         os_snprintf(anon, buflen, "anonymous%s", pos);
1033                 } else if (cred->realm) {
1034                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1035                         anon = os_malloc(buflen);
1036                         if (anon == NULL)
1037                                 return -1;
1038                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1039                 } else {
1040                         anon = os_strdup("anonymous");
1041                         if (anon == NULL)
1042                                 return -1;
1043                 }
1044                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1045                     0) {
1046                         os_free(anon);
1047                         return -1;
1048                 }
1049                 os_free(anon);
1050         }
1051
1052         if (cred->username && cred->username[0] &&
1053             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1054                 return -1;
1055
1056         if (cred->password && cred->password[0]) {
1057                 if (cred->ext_password &&
1058                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1059                         return -1;
1060                 if (!cred->ext_password &&
1061                     wpa_config_set_quoted(ssid, "password", cred->password) <
1062                     0)
1063                         return -1;
1064         }
1065
1066         if (cred->client_cert && cred->client_cert[0] &&
1067             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1068                 return -1;
1069
1070 #ifdef ANDROID
1071         if (cred->private_key &&
1072             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1073                 /* Use OpenSSL engine configuration for Android keystore */
1074                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1075                     wpa_config_set_quoted(ssid, "key_id",
1076                                           cred->private_key + 11) < 0 ||
1077                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1078                         return -1;
1079         } else
1080 #endif /* ANDROID */
1081         if (cred->private_key && cred->private_key[0] &&
1082             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1083                 return -1;
1084
1085         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1086             wpa_config_set_quoted(ssid, "private_key_passwd",
1087                                   cred->private_key_passwd) < 0)
1088                 return -1;
1089
1090         if (cred->phase1) {
1091                 os_free(ssid->eap.phase1);
1092                 ssid->eap.phase1 = os_strdup(cred->phase1);
1093         }
1094         if (cred->phase2) {
1095                 os_free(ssid->eap.phase2);
1096                 ssid->eap.phase2 = os_strdup(cred->phase2);
1097         }
1098
1099         if (cred->ca_cert && cred->ca_cert[0] &&
1100             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1101                 return -1;
1102
1103         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1104             wpa_config_set_quoted(ssid, "domain_suffix_match",
1105                                   cred->domain_suffix_match) < 0)
1106                 return -1;
1107
1108         return 0;
1109 }
1110
1111
1112 static int interworking_connect_roaming_consortium(
1113         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1114         struct wpa_bss *bss, const u8 *ssid_ie)
1115 {
1116         struct wpa_ssid *ssid;
1117
1118         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1119                    "roaming consortium match", MAC2STR(bss->bssid));
1120
1121         ssid = wpa_config_add_network(wpa_s->conf);
1122         if (ssid == NULL)
1123                 return -1;
1124         ssid->parent_cred = cred;
1125         wpas_notify_network_added(wpa_s, ssid);
1126         wpa_config_set_network_defaults(ssid);
1127         ssid->priority = cred->priority;
1128         ssid->temporary = 1;
1129         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1130         if (ssid->ssid == NULL)
1131                 goto fail;
1132         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1133         ssid->ssid_len = ssid_ie[1];
1134
1135         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1136                 goto fail;
1137
1138         if (cred->eap_method == NULL) {
1139                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1140                            "credential using roaming consortium");
1141                 goto fail;
1142         }
1143
1144         if (interworking_set_eap_params(
1145                     ssid, cred,
1146                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1147                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1148                 goto fail;
1149
1150         wpa_config_update_prio_list(wpa_s->conf);
1151         interworking_reconnect(wpa_s);
1152
1153         return 0;
1154
1155 fail:
1156         wpas_notify_network_removed(wpa_s, ssid);
1157         wpa_config_remove_network(wpa_s->conf, ssid->id);
1158         return -1;
1159 }
1160
1161
1162 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1163 {
1164         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1165         struct wpa_ssid *ssid;
1166         struct nai_realm *realm;
1167         struct nai_realm_eap *eap = NULL;
1168         u16 count, i;
1169         char buf[100];
1170         const u8 *ie;
1171
1172         if (wpa_s->conf->cred == NULL || bss == NULL)
1173                 return -1;
1174         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1175         if (ie == NULL || ie[1] == 0) {
1176                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1177                            MACSTR, MAC2STR(bss->bssid));
1178                 return -1;
1179         }
1180
1181         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1182                 /*
1183                  * We currently support only HS 2.0 networks and those are
1184                  * required to use WPA2-Enterprise.
1185                  */
1186                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1187                            "RSN");
1188                 return -1;
1189         }
1190
1191         cred_rc = interworking_credentials_available_roaming_consortium(wpa_s,
1192                                                                         bss);
1193         if (cred_rc) {
1194                 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1195                            "consortium matching credential priority %d",
1196                            cred_rc->priority);
1197         }
1198
1199         cred = interworking_credentials_available_realm(wpa_s, bss);
1200         if (cred) {
1201                 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
1202                            "matching credential priority %d",
1203                            cred->priority);
1204         }
1205
1206         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss);
1207         if (cred_3gpp) {
1208                 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
1209                            "credential priority %d", cred_3gpp->priority);
1210         }
1211
1212         if (cred_rc &&
1213             (cred == NULL || cred_rc->priority >= cred->priority) &&
1214             (cred_3gpp == NULL || cred_rc->priority >= cred_3gpp->priority))
1215                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1216                                                                bss, ie);
1217
1218         if (cred_3gpp &&
1219             (cred == NULL || cred_3gpp->priority >= cred->priority)) {
1220                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
1221         }
1222
1223         if (cred == NULL) {
1224                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1225                            "found for " MACSTR, MAC2STR(bss->bssid));
1226                 return -1;
1227         }
1228
1229         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1230                                 &count);
1231         if (realm == NULL) {
1232                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1233                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1234                 return -1;
1235         }
1236
1237         for (i = 0; i < count; i++) {
1238                 if (!nai_realm_match(&realm[i], cred->realm))
1239                         continue;
1240                 eap = nai_realm_find_eap(cred, &realm[i]);
1241                 if (eap)
1242                         break;
1243         }
1244
1245         if (!eap) {
1246                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1247                            "and EAP method found for " MACSTR,
1248                            MAC2STR(bss->bssid));
1249                 nai_realm_free(realm, count);
1250                 return -1;
1251         }
1252
1253         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1254                    MAC2STR(bss->bssid));
1255
1256         ssid = wpa_config_add_network(wpa_s->conf);
1257         if (ssid == NULL) {
1258                 nai_realm_free(realm, count);
1259                 return -1;
1260         }
1261         ssid->parent_cred = cred;
1262         wpas_notify_network_added(wpa_s, ssid);
1263         wpa_config_set_network_defaults(ssid);
1264         ssid->priority = cred->priority;
1265         ssid->temporary = 1;
1266         ssid->ssid = os_zalloc(ie[1] + 1);
1267         if (ssid->ssid == NULL)
1268                 goto fail;
1269         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1270         ssid->ssid_len = ie[1];
1271
1272         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1273                 goto fail;
1274
1275         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1276                                                      eap->method), 0) < 0)
1277                 goto fail;
1278
1279         switch (eap->method) {
1280         case EAP_TYPE_TTLS:
1281                 if (eap->inner_method) {
1282                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1283                                     eap_get_name(EAP_VENDOR_IETF,
1284                                                  eap->inner_method));
1285                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1286                                 goto fail;
1287                         break;
1288                 }
1289                 switch (eap->inner_non_eap) {
1290                 case NAI_REALM_INNER_NON_EAP_PAP:
1291                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1292                             0)
1293                                 goto fail;
1294                         break;
1295                 case NAI_REALM_INNER_NON_EAP_CHAP:
1296                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1297                             < 0)
1298                                 goto fail;
1299                         break;
1300                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1301                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1302                                            0) < 0)
1303                                 goto fail;
1304                         break;
1305                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1306                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1307                                            0) < 0)
1308                                 goto fail;
1309                         break;
1310                 default:
1311                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1312                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1313                                            0) < 0)
1314                                 goto fail;
1315                         break;
1316                 }
1317                 break;
1318         case EAP_TYPE_PEAP:
1319                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1320                             eap_get_name(EAP_VENDOR_IETF,
1321                                          eap->inner_method ?
1322                                          eap->inner_method :
1323                                          EAP_TYPE_MSCHAPV2));
1324                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1325                         goto fail;
1326                 break;
1327         case EAP_TYPE_TLS:
1328                 break;
1329         }
1330
1331         if (interworking_set_eap_params(ssid, cred,
1332                                         eap->method == EAP_TYPE_TTLS) < 0)
1333                 goto fail;
1334
1335         nai_realm_free(realm, count);
1336
1337         wpa_config_update_prio_list(wpa_s->conf);
1338         interworking_reconnect(wpa_s);
1339
1340         return 0;
1341
1342 fail:
1343         wpas_notify_network_removed(wpa_s, ssid);
1344         wpa_config_remove_network(wpa_s->conf, ssid->id);
1345         nai_realm_free(realm, count);
1346         return -1;
1347 }
1348
1349
1350 static struct wpa_cred * interworking_credentials_available_3gpp(
1351         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1352 {
1353         struct wpa_cred *selected = NULL;
1354 #ifdef INTERWORKING_3GPP
1355         struct wpa_cred *cred;
1356         int ret;
1357
1358         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1359                 return NULL;
1360
1361         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1362                 char *sep;
1363                 const char *imsi;
1364                 int mnc_len;
1365                 char imsi_buf[16];
1366                 size_t msin_len;
1367
1368 #ifdef PCSC_FUNCS
1369                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1370                     wpa_s->imsi[0]) {
1371                         imsi = wpa_s->imsi;
1372                         mnc_len = wpa_s->mnc_len;
1373                         goto compare;
1374                 }
1375 #endif /* PCSC_FUNCS */
1376 #ifdef CONFIG_EAP_PROXY
1377                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1378                         imsi = wpa_s->imsi;
1379                         mnc_len = wpa_s->mnc_len;
1380                         goto compare;
1381                 }
1382 #endif /* CONFIG_EAP_PROXY */
1383
1384                 if (cred->imsi == NULL || !cred->imsi[0] ||
1385                     cred->milenage == NULL || !cred->milenage[0])
1386                         continue;
1387
1388                 sep = os_strchr(cred->imsi, '-');
1389                 if (sep == NULL ||
1390                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1391                         continue;
1392                 mnc_len = sep - cred->imsi - 3;
1393                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1394                 sep++;
1395                 msin_len = os_strlen(cred->imsi);
1396                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1397                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1398                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1399                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1400                 imsi = imsi_buf;
1401
1402 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1403         compare:
1404 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1405                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1406                            MACSTR, MAC2STR(bss->bssid));
1407                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1408                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1409                 if (ret) {
1410                         if (cred_excluded_ssid(cred, bss))
1411                                 continue;
1412                         if (selected == NULL ||
1413                             selected->priority < cred->priority)
1414                                 selected = cred;
1415                 }
1416         }
1417 #endif /* INTERWORKING_3GPP */
1418         return selected;
1419 }
1420
1421
1422 static struct wpa_cred * interworking_credentials_available_realm(
1423         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1424 {
1425         struct wpa_cred *cred, *selected = NULL;
1426         struct nai_realm *realm;
1427         u16 count, i;
1428
1429         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1430                 return NULL;
1431
1432         if (wpa_s->conf->cred == NULL)
1433                 return NULL;
1434
1435         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1436                    MACSTR, MAC2STR(bss->bssid));
1437         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1438         if (realm == NULL) {
1439                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1440                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1441                 return NULL;
1442         }
1443
1444         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1445                 if (cred->realm == NULL)
1446                         continue;
1447
1448                 for (i = 0; i < count; i++) {
1449                         if (!nai_realm_match(&realm[i], cred->realm))
1450                                 continue;
1451                         if (nai_realm_find_eap(cred, &realm[i])) {
1452                                 if (cred_excluded_ssid(cred, bss))
1453                                         continue;
1454                                 if (selected == NULL ||
1455                                     selected->priority < cred->priority)
1456                                         selected = cred;
1457                                 break;
1458                         }
1459                 }
1460         }
1461
1462         nai_realm_free(realm, count);
1463
1464         return selected;
1465 }
1466
1467
1468 static struct wpa_cred * interworking_credentials_available(
1469         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1470 {
1471         struct wpa_cred *cred, *cred2;
1472
1473         cred = interworking_credentials_available_realm(wpa_s, bss);
1474         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1475         if (cred && cred2 && cred2->priority >= cred->priority)
1476                 cred = cred2;
1477         if (!cred)
1478                 cred = cred2;
1479
1480         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1481                                                                       bss);
1482         if (cred && cred2 && cred2->priority >= cred->priority)
1483                 cred = cred2;
1484         if (!cred)
1485                 cred = cred2;
1486
1487         return cred;
1488 }
1489
1490
1491 static int domain_name_list_contains(struct wpabuf *domain_names,
1492                                      const char *domain)
1493 {
1494         const u8 *pos, *end;
1495         size_t len;
1496
1497         len = os_strlen(domain);
1498         pos = wpabuf_head(domain_names);
1499         end = pos + wpabuf_len(domain_names);
1500
1501         while (pos + 1 < end) {
1502                 if (pos + 1 + pos[0] > end)
1503                         break;
1504
1505                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1506                                   pos + 1, pos[0]);
1507                 if (pos[0] == len &&
1508                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1509                         return 1;
1510
1511                 pos += 1 + pos[0];
1512         }
1513
1514         return 0;
1515 }
1516
1517
1518 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
1519                               struct wpa_cred *cred,
1520                               struct wpabuf *domain_names)
1521 {
1522         size_t i;
1523 #ifdef INTERWORKING_3GPP
1524         char nai[100], *realm;
1525
1526         char *imsi = NULL;
1527         int mnc_len = 0;
1528         if (cred->imsi)
1529                 imsi = cred->imsi;
1530 #ifdef CONFIG_PCSC
1531         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1532                  wpa_s->scard && wpa_s->imsi[0]) {
1533                 imsi = wpa_s->imsi;
1534                 mnc_len = wpa_s->mnc_len;
1535         }
1536 #endif /* CONFIG_PCSC */
1537         if (domain_names &&
1538             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
1539                 realm = os_strchr(nai, '@');
1540                 if (realm)
1541                         realm++;
1542                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1543                            "with SIM/USIM domain %s", realm);
1544                 if (realm &&
1545                     domain_name_list_contains(domain_names, realm))
1546                         return 1;
1547         }
1548 #endif /* INTERWORKING_3GPP */
1549
1550         if (domain_names == NULL || cred->domain == NULL)
1551                 return 0;
1552
1553         for (i = 0; i < cred->num_domain; i++) {
1554                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1555                            "home SP FQDN %s", cred->domain[i]);
1556                 if (domain_name_list_contains(domain_names, cred->domain[i]))
1557                         return 1;
1558         }
1559
1560         return 0;
1561 }
1562
1563
1564 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1565                                 struct wpabuf *domain_names)
1566 {
1567         struct wpa_cred *cred;
1568
1569         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1570                 return -1;
1571
1572         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1573                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
1574                 if (res)
1575                         return res;
1576         }
1577
1578         return 0;
1579 }
1580
1581
1582 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1583 {
1584         struct wpa_bss *bss;
1585         struct wpa_ssid *ssid;
1586
1587         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1588                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1589                         if (wpas_network_disabled(wpa_s, ssid) ||
1590                             ssid->mode != WPAS_MODE_INFRA)
1591                                 continue;
1592                         if (ssid->ssid_len != bss->ssid_len ||
1593                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1594                             0)
1595                                 continue;
1596                         /*
1597                          * TODO: Consider more accurate matching of security
1598                          * configuration similarly to what is done in events.c
1599                          */
1600                         return 1;
1601                 }
1602         }
1603
1604         return 0;
1605 }
1606
1607
1608 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1609 {
1610         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1611         int selected_prio = -999999, selected_home_prio = -999999;
1612         unsigned int count = 0;
1613         const char *type;
1614         int res;
1615         struct wpa_cred *cred;
1616
1617         wpa_s->network_select = 0;
1618
1619         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1620                 cred = interworking_credentials_available(wpa_s, bss);
1621                 if (!cred)
1622                         continue;
1623                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1624                         /*
1625                          * We currently support only HS 2.0 networks and those
1626                          * are required to use WPA2-Enterprise.
1627                          */
1628                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1629                                    "with " MACSTR " but network does not use "
1630                                    "RSN", MAC2STR(bss->bssid));
1631                         continue;
1632                 }
1633                 count++;
1634                 res = interworking_home_sp(wpa_s, bss->anqp ?
1635                                            bss->anqp->domain_name : NULL);
1636                 if (res > 0)
1637                         type = "home";
1638                 else if (res == 0)
1639                         type = "roaming";
1640                 else
1641                         type = "unknown";
1642                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1643                         MAC2STR(bss->bssid), type);
1644                 if (wpa_s->auto_select ||
1645                     (wpa_s->conf->auto_interworking &&
1646                      wpa_s->auto_network_select)) {
1647                         if (selected == NULL ||
1648                             cred->priority > selected_prio) {
1649                                 selected = bss;
1650                                 selected_prio = cred->priority;
1651                         }
1652                         if (res > 0 &&
1653                             (selected_home == NULL ||
1654                              cred->priority > selected_home_prio)) {
1655                                 selected_home = bss;
1656                                 selected_home_prio = cred->priority;
1657                         }
1658                 }
1659         }
1660
1661         if (selected_home && selected_home != selected &&
1662             selected_home_prio >= selected_prio) {
1663                 /* Prefer network operated by the Home SP */
1664                 selected = selected_home;
1665         }
1666
1667         if (count == 0) {
1668                 /*
1669                  * No matching network was found based on configured
1670                  * credentials. Check whether any of the enabled network blocks
1671                  * have matching APs.
1672                  */
1673                 if (interworking_find_network_match(wpa_s)) {
1674                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1675                                    "match for enabled network configurations");
1676                         if (wpa_s->auto_select)
1677                                 interworking_reconnect(wpa_s);
1678                         return;
1679                 }
1680
1681                 if (wpa_s->auto_network_select) {
1682                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1683                                    "scanning after ANQP fetch");
1684                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1685                                                 0);
1686                         return;
1687                 }
1688
1689                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1690                         "with matching credentials found");
1691         }
1692
1693         if (selected)
1694                 interworking_connect(wpa_s, selected);
1695 }
1696
1697
1698 static struct wpa_bss_anqp *
1699 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1700 {
1701         struct wpa_bss *other;
1702
1703         if (is_zero_ether_addr(bss->hessid))
1704                 return NULL; /* Cannot be in the same homegenous ESS */
1705
1706         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1707                 if (other == bss)
1708                         continue;
1709                 if (other->anqp == NULL)
1710                         continue;
1711                 if (other->anqp->roaming_consortium == NULL &&
1712                     other->anqp->nai_realm == NULL &&
1713                     other->anqp->anqp_3gpp == NULL &&
1714                     other->anqp->domain_name == NULL)
1715                         continue;
1716                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1717                         continue;
1718                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1719                         continue;
1720                 if (bss->ssid_len != other->ssid_len ||
1721                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1722                         continue;
1723
1724                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1725                            "already fetched BSSID " MACSTR " and " MACSTR,
1726                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1727                 other->anqp->users++;
1728                 return other->anqp;
1729         }
1730
1731         return NULL;
1732 }
1733
1734
1735 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1736 {
1737         struct wpa_bss *bss;
1738         int found = 0;
1739         const u8 *ie;
1740
1741         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress)
1742                 return;
1743
1744         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1745                 if (!(bss->caps & IEEE80211_CAP_ESS))
1746                         continue;
1747                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1748                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1749                         continue; /* AP does not support Interworking */
1750
1751                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1752                         if (bss->anqp == NULL) {
1753                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1754                                                                          bss);
1755                                 if (bss->anqp) {
1756                                         /* Shared data already fetched */
1757                                         continue;
1758                                 }
1759                                 bss->anqp = wpa_bss_anqp_alloc();
1760                                 if (bss->anqp == NULL)
1761                                         break;
1762                         }
1763                         found++;
1764                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1765                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1766                                 MACSTR, MAC2STR(bss->bssid));
1767                         interworking_anqp_send_req(wpa_s, bss);
1768                         break;
1769                 }
1770         }
1771
1772         if (found == 0) {
1773                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1774                 wpa_s->fetch_anqp_in_progress = 0;
1775                 if (wpa_s->network_select)
1776                         interworking_select_network(wpa_s);
1777         }
1778 }
1779
1780
1781 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1782 {
1783         struct wpa_bss *bss;
1784
1785         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1786                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1787
1788         wpa_s->fetch_anqp_in_progress = 1;
1789         interworking_next_anqp_fetch(wpa_s);
1790 }
1791
1792
1793 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1794 {
1795         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1796                 return 0;
1797
1798         wpa_s->network_select = 0;
1799         wpa_s->fetch_all_anqp = 1;
1800
1801         interworking_start_fetch_anqp(wpa_s);
1802
1803         return 0;
1804 }
1805
1806
1807 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1808 {
1809         if (!wpa_s->fetch_anqp_in_progress)
1810                 return;
1811
1812         wpa_s->fetch_anqp_in_progress = 0;
1813 }
1814
1815
1816 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1817                   u16 info_ids[], size_t num_ids)
1818 {
1819         struct wpabuf *buf;
1820         int ret = 0;
1821         int freq;
1822         struct wpa_bss *bss;
1823         int res;
1824
1825         freq = wpa_s->assoc_freq;
1826         bss = wpa_bss_get_bssid(wpa_s, dst);
1827         if (bss) {
1828                 wpa_bss_anqp_unshare_alloc(bss);
1829                 freq = bss->freq;
1830         }
1831         if (freq <= 0)
1832                 return -1;
1833
1834         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1835                    MAC2STR(dst), (unsigned int) num_ids);
1836
1837         buf = anqp_build_req(info_ids, num_ids, NULL);
1838         if (buf == NULL)
1839                 return -1;
1840
1841         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1842         if (res < 0) {
1843                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1844                 ret = -1;
1845         } else
1846                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1847                            "%u", res);
1848
1849         wpabuf_free(buf);
1850         return ret;
1851 }
1852
1853
1854 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1855                                             struct wpa_bss *bss, const u8 *sa,
1856                                             u16 info_id,
1857                                             const u8 *data, size_t slen)
1858 {
1859         const u8 *pos = data;
1860         struct wpa_bss_anqp *anqp = NULL;
1861 #ifdef CONFIG_HS20
1862         u8 type;
1863 #endif /* CONFIG_HS20 */
1864
1865         if (bss)
1866                 anqp = bss->anqp;
1867
1868         switch (info_id) {
1869         case ANQP_CAPABILITY_LIST:
1870                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1871                         " ANQP Capability list", MAC2STR(sa));
1872                 break;
1873         case ANQP_VENUE_NAME:
1874                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1875                         " Venue Name", MAC2STR(sa));
1876                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1877                 if (anqp) {
1878                         wpabuf_free(anqp->venue_name);
1879                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1880                 }
1881                 break;
1882         case ANQP_NETWORK_AUTH_TYPE:
1883                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1884                         " Network Authentication Type information",
1885                         MAC2STR(sa));
1886                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1887                                   "Type", pos, slen);
1888                 if (anqp) {
1889                         wpabuf_free(anqp->network_auth_type);
1890                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1891                 }
1892                 break;
1893         case ANQP_ROAMING_CONSORTIUM:
1894                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1895                         " Roaming Consortium list", MAC2STR(sa));
1896                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1897                                   pos, slen);
1898                 if (anqp) {
1899                         wpabuf_free(anqp->roaming_consortium);
1900                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1901                 }
1902                 break;
1903         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1904                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1905                         " IP Address Type Availability information",
1906                         MAC2STR(sa));
1907                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1908                             pos, slen);
1909                 if (anqp) {
1910                         wpabuf_free(anqp->ip_addr_type_availability);
1911                         anqp->ip_addr_type_availability =
1912                                 wpabuf_alloc_copy(pos, slen);
1913                 }
1914                 break;
1915         case ANQP_NAI_REALM:
1916                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1917                         " NAI Realm list", MAC2STR(sa));
1918                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1919                 if (anqp) {
1920                         wpabuf_free(anqp->nai_realm);
1921                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1922                 }
1923                 break;
1924         case ANQP_3GPP_CELLULAR_NETWORK:
1925                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1926                         " 3GPP Cellular Network information", MAC2STR(sa));
1927                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1928                                   pos, slen);
1929                 if (anqp) {
1930                         wpabuf_free(anqp->anqp_3gpp);
1931                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1932                 }
1933                 break;
1934         case ANQP_DOMAIN_NAME:
1935                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1936                         " Domain Name list", MAC2STR(sa));
1937                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1938                 if (anqp) {
1939                         wpabuf_free(anqp->domain_name);
1940                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1941                 }
1942                 break;
1943         case ANQP_VENDOR_SPECIFIC:
1944                 if (slen < 3)
1945                         return;
1946
1947                 switch (WPA_GET_BE24(pos)) {
1948 #ifdef CONFIG_HS20
1949                 case OUI_WFA:
1950                         pos += 3;
1951                         slen -= 3;
1952
1953                         if (slen < 1)
1954                                 return;
1955                         type = *pos++;
1956                         slen--;
1957
1958                         switch (type) {
1959                         case HS20_ANQP_OUI_TYPE:
1960                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1961                                                              slen);
1962                                 break;
1963                         default:
1964                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1965                                            "vendor type %u", type);
1966                                 break;
1967                         }
1968                         break;
1969 #endif /* CONFIG_HS20 */
1970                 default:
1971                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1972                                    "vendor-specific ANQP OUI %06x",
1973                                    WPA_GET_BE24(pos));
1974                         return;
1975                 }
1976                 break;
1977         default:
1978                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1979                            "%u", info_id);
1980                 break;
1981         }
1982 }
1983
1984
1985 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1986                   enum gas_query_result result,
1987                   const struct wpabuf *adv_proto,
1988                   const struct wpabuf *resp, u16 status_code)
1989 {
1990         struct wpa_supplicant *wpa_s = ctx;
1991         const u8 *pos;
1992         const u8 *end;
1993         u16 info_id;
1994         u16 slen;
1995         struct wpa_bss *bss = NULL, *tmp;
1996
1997         if (result != GAS_QUERY_SUCCESS)
1998                 return;
1999
2000         pos = wpabuf_head(adv_proto);
2001         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2002             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2003                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
2004                            "Protocol in response");
2005                 return;
2006         }
2007
2008         /*
2009          * If possible, select the BSS entry based on which BSS entry was used
2010          * for the request. This can help in cases where multiple BSS entries
2011          * may exist for the same AP.
2012          */
2013         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2014                 if (tmp == wpa_s->interworking_gas_bss &&
2015                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2016                         bss = tmp;
2017                         break;
2018                 }
2019         }
2020         if (bss == NULL)
2021                 bss = wpa_bss_get_bssid(wpa_s, dst);
2022
2023         pos = wpabuf_head(resp);
2024         end = pos + wpabuf_len(resp);
2025
2026         while (pos < end) {
2027                 if (pos + 4 > end) {
2028                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
2029                         break;
2030                 }
2031                 info_id = WPA_GET_LE16(pos);
2032                 pos += 2;
2033                 slen = WPA_GET_LE16(pos);
2034                 pos += 2;
2035                 if (pos + slen > end) {
2036                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
2037                                    "for Info ID %u", info_id);
2038                         break;
2039                 }
2040                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2041                                                 slen);
2042                 pos += slen;
2043         }
2044 }
2045
2046
2047 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2048                                           struct wpa_scan_results *scan_res)
2049 {
2050         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2051                    "ANQP fetch");
2052         interworking_start_fetch_anqp(wpa_s);
2053 }
2054
2055
2056 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
2057 {
2058         interworking_stop_fetch_anqp(wpa_s);
2059         wpa_s->network_select = 1;
2060         wpa_s->auto_network_select = 0;
2061         wpa_s->auto_select = !!auto_select;
2062         wpa_s->fetch_all_anqp = 0;
2063         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2064                    "selection");
2065         wpa_s->scan_res_handler = interworking_scan_res_handler;
2066         wpa_s->scan_req = MANUAL_SCAN_REQ;
2067         wpa_supplicant_req_scan(wpa_s, 0, 0);
2068
2069         return 0;
2070 }
2071
2072
2073 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2074                         enum gas_query_result result,
2075                         const struct wpabuf *adv_proto,
2076                         const struct wpabuf *resp, u16 status_code)
2077 {
2078         struct wpa_supplicant *wpa_s = ctx;
2079
2080         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2081                 " dialog_token=%d status_code=%d resp_len=%d",
2082                 MAC2STR(addr), dialog_token, status_code,
2083                 resp ? (int) wpabuf_len(resp) : -1);
2084         if (!resp)
2085                 return;
2086
2087         wpabuf_free(wpa_s->last_gas_resp);
2088         wpa_s->last_gas_resp = wpabuf_dup(resp);
2089         if (wpa_s->last_gas_resp == NULL)
2090                 return;
2091         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2092         wpa_s->last_gas_dialog_token = dialog_token;
2093 }
2094
2095
2096 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2097                      const struct wpabuf *adv_proto,
2098                      const struct wpabuf *query)
2099 {
2100         struct wpabuf *buf;
2101         int ret = 0;
2102         int freq;
2103         struct wpa_bss *bss;
2104         int res;
2105         size_t len;
2106         u8 query_resp_len_limit = 0, pame_bi = 0;
2107
2108         freq = wpa_s->assoc_freq;
2109         bss = wpa_bss_get_bssid(wpa_s, dst);
2110         if (bss)
2111                 freq = bss->freq;
2112         if (freq <= 0)
2113                 return -1;
2114
2115         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2116                    MAC2STR(dst), freq);
2117         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2118         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2119
2120         len = 3 + wpabuf_len(adv_proto) + 2;
2121         if (query)
2122                 len += wpabuf_len(query);
2123         buf = gas_build_initial_req(0, len);
2124         if (buf == NULL)
2125                 return -1;
2126
2127         /* Advertisement Protocol IE */
2128         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2129         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2130         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2131                       (pame_bi ? 0x80 : 0));
2132         wpabuf_put_buf(buf, adv_proto);
2133
2134         /* GAS Query */
2135         if (query) {
2136                 wpabuf_put_le16(buf, wpabuf_len(query));
2137                 wpabuf_put_buf(buf, query);
2138         } else
2139                 wpabuf_put_le16(buf, 0);
2140
2141         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2142         if (res < 0) {
2143                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2144                 ret = -1;
2145         } else
2146                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2147                            "%u", res);
2148
2149         wpabuf_free(buf);
2150         return ret;
2151 }