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                 if (cred->required_roaming_consortium_len)
 116                         return 1;
 117         }
 118         return 0;
 119 }
 120
 121
 122 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 123 {
 124         struct wpa_cred *cred;
 125
 126         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 127                 if (cred->pcsc || cred->imsi)
 128                         return 1;
 129         }
 130         return 0;
 131 }
 132
 133
 134 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 135 {
 136         struct wpa_cred *cred;
 137
 138         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 139                 if (cred->pcsc || cred->imsi)
 140                         continue;
 141                 if (!cred->eap_method)
 142                         return 1;
 143                 if (cred->realm && cred->roaming_consortium_len == 0)
 144                         return 1;
 145         }
 146         return 0;
 147 }
 148
 149
 150 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 151 {
 152         struct wpa_cred *cred;
 153
 154         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 155                 if (cred->domain || cred->pcsc || cred->imsi)
 156                         return 1;
 157         }
 158         return 0;
 159 }
 160
 161
 162 static int additional_roaming_consortiums(struct wpa_bss *bss)
 163 {
 164         const u8 *ie;
 165         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 166         if (ie == NULL || ie[1] == 0)
 167                 return 0;
 168         return ie[2]; /* Number of ANQP OIs */
 169 }
 170
 171
 172 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 173 {
 174         struct wpa_supplicant *wpa_s = eloop_ctx;
 175         interworking_next_anqp_fetch(wpa_s);
 176 }
 177
 178
 179 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 180                                       struct wpa_bss *bss)
 181 {
 182         struct wpabuf *buf;
 183         int ret = 0;
 184         int res;
 185         u16 info_ids[8];
 186         size_t num_info_ids = 0;
 187         struct wpabuf *extra = NULL;
 188         int all = wpa_s->fetch_all_anqp;
 189
 190         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 191                    MAC2STR(bss->bssid));
 192         wpa_s->interworking_gas_bss = bss;
 193
 194         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 195         if (all) {
 196                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 197                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 198         }
 199         if (all || (cred_with_roaming_consortium(wpa_s) &&
 200                     additional_roaming_consortiums(bss)))
 201                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 202         if (all)
 203                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 204         if (all || cred_with_nai_realm(wpa_s))
 205                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 206         if (all || cred_with_3gpp(wpa_s))
 207                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 208         if (all || cred_with_domain(wpa_s))
 209                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 210         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 211                     (u8 *) info_ids, num_info_ids * 2);
 212
 213 #ifdef CONFIG_HS20
 214         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 215                 u8 *len_pos;
 216
 217                 extra = wpabuf_alloc(100);
 218                 if (!extra)
 219                         return -1;
 220
 221                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 222                 wpabuf_put_be24(extra, OUI_WFA);
 223                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 224                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 225                 wpabuf_put_u8(extra, 0); /* Reserved */
 226                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 227                 if (all) {
 228                         wpabuf_put_u8(extra,
 229                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 230                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 231                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 232                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 233                 }
 234                 gas_anqp_set_element_len(extra, len_pos);
 235         }
 236 #endif /* CONFIG_HS20 */
 237
 238         buf = anqp_build_req(info_ids, num_info_ids, extra);
 239         wpabuf_free(extra);
 240         if (buf == NULL)
 241                 return -1;
 242
 243         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 244                             interworking_anqp_resp_cb, wpa_s);
 245         if (res < 0) {
 246                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 247                 wpabuf_free(buf);
 248                 ret = -1;
 249                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 250                                        NULL);
 251         } else
 252                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 253                            "%u", res);
 254
 255         return ret;
 256 }
 257
 258
 259 struct nai_realm_eap {
 260         u8 method;
 261         u8 inner_method;
 262         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 263         u8 cred_type;
 264         u8 tunneled_cred_type;
 265 };
 266
 267 struct nai_realm {
 268         u8 encoding;
 269         char *realm;
 270         u8 eap_count;
 271         struct nai_realm_eap *eap;
 272 };
 273
 274
 275 static void nai_realm_free(struct nai_realm *realms, u16 count)
 276 {
 277         u16 i;
 278
 279         if (realms == NULL)
 280                 return;
 281         for (i = 0; i < count; i++) {
 282                 os_free(realms[i].eap);
 283                 os_free(realms[i].realm);
 284         }
 285         os_free(realms);
 286 }
 287
 288
 289 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 290                                       const u8 *end)
 291 {
 292         u8 elen, auth_count, a;
 293         const u8 *e_end;
 294
 295         if (pos + 3 > end) {
 296                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 297                 return NULL;
 298         }
 299
 300         elen = *pos++;
 301         if (pos + elen > end || elen < 2) {
 302                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 303                 return NULL;
 304         }
 305         e_end = pos + elen;
 306         e->method = *pos++;
 307         auth_count = *pos++;
 308         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 309                    elen, e->method, auth_count);
 310
 311         for (a = 0; a < auth_count; a++) {
 312                 u8 id, len;
 313
 314                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 315                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 316                                    "Parameter subfield");
 317                         return NULL;
 318                 }
 319
 320                 id = *pos++;
 321                 len = *pos++;
 322
 323                 switch (id) {
 324                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 325                         if (len < 1)
 326                                 break;
 327                         e->inner_non_eap = *pos;
 328                         if (e->method != EAP_TYPE_TTLS)
 329                                 break;
 330                         switch (*pos) {
 331                         case NAI_REALM_INNER_NON_EAP_PAP:
 332                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 333                                 break;
 334                         case NAI_REALM_INNER_NON_EAP_CHAP:
 335                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 336                                 break;
 337                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 338                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 339                                 break;
 340                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 341                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 342                                 break;
 343                         }
 344                         break;
 345                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 346                         if (len < 1)
 347                                 break;
 348                         e->inner_method = *pos;
 349                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 350                                    e->inner_method);
 351                         break;
 352                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 353                         if (len < 1)
 354                                 break;
 355                         e->cred_type = *pos;
 356                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 357                                    e->cred_type);
 358                         break;
 359                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 360                         if (len < 1)
 361                                 break;
 362                         e->tunneled_cred_type = *pos;
 363                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 364                                    "Type: %u", e->tunneled_cred_type);
 365                         break;
 366                 default:
 367                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 368                                    "Parameter: id=%u len=%u", id, len);
 369                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 370                                     "Value", pos, len);
 371                         break;
 372                 }
 373
 374                 pos += len;
 375         }
 376
 377         return e_end;
 378 }
 379
 380
 381 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 382                                         const u8 *end)
 383 {
 384         u16 len;
 385         const u8 *f_end;
 386         u8 realm_len, e;
 387
 388         if (end - pos < 4) {
 389                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 390                            "fixed fields");
 391                 return NULL;
 392         }
 393
 394         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 395         pos += 2;
 396         if (pos + len > end || len < 3) {
 397                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 398                            "(len=%u; left=%u)",
 399                            len, (unsigned int) (end - pos));
 400                 return NULL;
 401         }
 402         f_end = pos + len;
 403
 404         r->encoding = *pos++;
 405         realm_len = *pos++;
 406         if (pos + realm_len > f_end) {
 407                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 408                            "(len=%u; left=%u)",
 409                            realm_len, (unsigned int) (f_end - pos));
 410                 return NULL;
 411         }
 412         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 413         r->realm = dup_binstr(pos, realm_len);
 414         if (r->realm == NULL)
 415                 return NULL;
 416         pos += realm_len;
 417
 418         if (pos + 1 > f_end) {
 419                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 420                 return NULL;
 421         }
 422         r->eap_count = *pos++;
 423         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 424         if (pos + r->eap_count * 3 > f_end) {
 425                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 426                 return NULL;
 427         }
 428         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 429         if (r->eap == NULL)
 430                 return NULL;
 431
 432         for (e = 0; e < r->eap_count; e++) {
 433                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 434                 if (pos == NULL)
 435                         return NULL;
 436         }
 437
 438         return f_end;
 439 }
 440
 441
 442 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 443 {
 444         struct nai_realm *realm;
 445         const u8 *pos, *end;
 446         u16 i, num;
 447
 448         if (anqp == NULL || wpabuf_len(anqp) < 2)
 449                 return NULL;
 450
 451         pos = wpabuf_head_u8(anqp);
 452         end = pos + wpabuf_len(anqp);
 453         num = WPA_GET_LE16(pos);
 454         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 455         pos += 2;
 456
 457         if (num * 5 > end - pos) {
 458                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 459                            "enough data (%u octets) for that many realms",
 460                            num, (unsigned int) (end - pos));
 461                 return NULL;
 462         }
 463
 464         realm = os_calloc(num, sizeof(struct nai_realm));
 465         if (realm == NULL)
 466                 return NULL;
 467
 468         for (i = 0; i < num; i++) {
 469                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 470                 if (pos == NULL) {
 471                         nai_realm_free(realm, num);
 472                         return NULL;
 473                 }
 474         }
 475
 476         *count = num;
 477         return realm;
 478 }
 479
 480
 481 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 482 {
 483         char *tmp, *pos, *end;
 484         int match = 0;
 485
 486         if (realm->realm == NULL || home_realm == NULL)
 487                 return 0;
 488
 489         if (os_strchr(realm->realm, ';') == NULL)
 490                 return os_strcasecmp(realm->realm, home_realm) == 0;
 491
 492         tmp = os_strdup(realm->realm);
 493         if (tmp == NULL)
 494                 return 0;
 495
 496         pos = tmp;
 497         while (*pos) {
 498                 end = os_strchr(pos, ';');
 499                 if (end)
 500                         *end = '\0';
 501                 if (os_strcasecmp(pos, home_realm) == 0) {
 502                         match = 1;
 503                         break;
 504                 }
 505                 if (end == NULL)
 506                         break;
 507                 pos = end + 1;
 508         }
 509
 510         os_free(tmp);
 511
 512         return match;
 513 }
 514
 515
 516 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 517 {
 518         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 519                 return 0; /* method not supported */
 520
 521         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 522                 /* Only tunneled methods with username/password supported */
 523                 return 0;
 524         }
 525
 526         if (eap->method == EAP_TYPE_PEAP) {
 527                 if (eap->inner_method &&
 528                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 529                         return 0;
 530                 if (!eap->inner_method &&
 531                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
 532                         return 0;
 533         }
 534
 535         if (eap->method == EAP_TYPE_TTLS) {
 536                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 537                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 538                 if (eap->inner_method &&
 539                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 540                         return 0;
 541                 if (eap->inner_non_eap &&
 542                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 543                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 544                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 545                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 546                         return 0;
 547         }
 548
 549         if (eap->inner_method &&
 550             eap->inner_method != EAP_TYPE_GTC &&
 551             eap->inner_method != EAP_TYPE_MSCHAPV2)
 552                 return 0;
 553
 554         return 1;
 555 }
 556
 557
 558 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 559 {
 560         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 561                 return 0; /* method not supported */
 562
 563         if (eap->method != EAP_TYPE_TLS) {
 564                 /* Only EAP-TLS supported for credential authentication */
 565                 return 0;
 566         }
 567
 568         return 1;
 569 }
 570
 571
 572 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 573                                                  struct nai_realm *realm)
 574 {
 575         u8 e;
 576
 577         if (cred == NULL ||
 578             cred->username == NULL ||
 579             cred->username[0] == '\0' ||
 580             ((cred->password == NULL ||
 581               cred->password[0] == '\0') &&
 582              (cred->private_key == NULL ||
 583               cred->private_key[0] == '\0')))
 584                 return NULL;
 585
 586         for (e = 0; e < realm->eap_count; e++) {
 587                 struct nai_realm_eap *eap = &realm->eap[e];
 588                 if (cred->password && cred->password[0] &&
 589                     nai_realm_cred_username(eap))
 590                         return eap;
 591                 if (cred->private_key && cred->private_key[0] &&
 592                     nai_realm_cred_cert(eap))
 593                         return eap;
 594         }
 595
 596         return NULL;
 597 }
 598
 599
 600 #ifdef INTERWORKING_3GPP
 601
 602 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 603 {
 604         u8 plmn[3], plmn2[3];
 605         const u8 *pos, *end;
 606         u8 udhl;
 607
 608         /*
 609          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 610          * operator is allowed to include only two digits of the MNC, so allow
 611          * matches based on both two and three digit MNC assumptions. Since some
 612          * SIM/USIM cards may not expose MNC length conveniently, we may be
 613          * provided the default MNC length 3 here and as such, checking with MNC
 614          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 615          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 616          * with otherwise matching values would not be good idea in general, so
 617          * this should not result in selecting incorrect networks.
 618          */
 619         /* Match with 3 digit MNC */
 620         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 621         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 622         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 623         /* Match with 2 digit MNC */
 624         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 625         plmn2[1] = (imsi[2] - '0') | 0xf0;
 626         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 627
 628         if (anqp == NULL)
 629                 return 0;
 630         pos = wpabuf_head_u8(anqp);
 631         end = pos + wpabuf_len(anqp);
 632         if (pos + 2 > end)
 633                 return 0;
 634         if (*pos != 0) {
 635                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 636                 return 0;
 637         }
 638         pos++;
 639         udhl = *pos++;
 640         if (pos + udhl > end) {
 641                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 642                 return 0;
 643         }
 644         end = pos + udhl;
 645
 646         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 647                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 648                    imsi, mnc_len);
 649
 650         while (pos + 2 <= end) {
 651                 u8 iei, len;
 652                 const u8 *l_end;
 653                 iei = *pos++;
 654                 len = *pos++ & 0x7f;
 655                 if (pos + len > end)
 656                         break;
 657                 l_end = pos + len;
 658
 659                 if (iei == 0 && len > 0) {
 660                         /* PLMN List */
 661                         u8 num, i;
 662                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 663                                     pos, len);
 664                         num = *pos++;
 665                         for (i = 0; i < num; i++) {
 666                                 if (pos + 3 > l_end)
 667                                         break;
 668                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 669                                     os_memcmp(pos, plmn2, 3) == 0)
 670                                         return 1; /* Found matching PLMN */
 671                                 pos += 3;
 672                         }
 673                 } else {
 674                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 675                                     pos, len);
 676                 }
 677
 678                 pos = l_end;
 679         }
 680
 681         return 0;
 682 }
 683
 684
 685 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 686                           size_t mnc_len, char prefix)
 687 {
 688         const char *sep, *msin;
 689         char *end, *pos;
 690         size_t msin_len, plmn_len;
 691
 692         /*
 693          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 694          * Root NAI:
 695          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 696          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 697          */
 698
 699         if (imsi == NULL || os_strlen(imsi) > 16) {
 700                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 701                 return -1;
 702         }
 703         sep = os_strchr(imsi, '-');
 704         if (sep) {
 705                 plmn_len = sep - imsi;
 706                 msin = sep + 1;
 707         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 708                 plmn_len = 3 + mnc_len;
 709                 msin = imsi + plmn_len;
 710         } else
 711                 return -1;
 712         if (plmn_len != 5 && plmn_len != 6)
 713                 return -1;
 714         msin_len = os_strlen(msin);
 715
 716         pos = nai;
 717         end = nai + nai_len;
 718         if (prefix)
 719                 *pos++ = prefix;
 720         os_memcpy(pos, imsi, plmn_len);
 721         pos += plmn_len;
 722         os_memcpy(pos, msin, msin_len);
 723         pos += msin_len;
 724         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 725         if (plmn_len == 5) {
 726                 *pos++ = '0';
 727                 *pos++ = imsi[3];
 728                 *pos++ = imsi[4];
 729         } else {
 730                 *pos++ = imsi[3];
 731                 *pos++ = imsi[4];
 732                 *pos++ = imsi[5];
 733         }
 734         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 735                            imsi[0], imsi[1], imsi[2]);
 736
 737         return 0;
 738 }
 739
 740
 741 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 742 {
 743         char nai[100];
 744         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 745                 return -1;
 746         return wpa_config_set_quoted(ssid, "identity", nai);
 747 }
 748
 749 #endif /* INTERWORKING_3GPP */
 750
 751
 752 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 753                                         struct wpa_ssid *ssid)
 754 {
 755         if (wpa_config_set(ssid, "key_mgmt",
 756                            wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 757                            "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0)
 758                 return -1;
 759         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 760                 return -1;
 761         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 762                 return -1;
 763         return 0;
 764 }
 765
 766
 767 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 768                                      struct wpa_cred *cred,
 769                                      struct wpa_bss *bss)
 770 {
 771 #ifdef INTERWORKING_3GPP
 772         struct wpa_ssid *ssid;
 773         const u8 *ie;
 774         int eap_type;
 775         int res;
 776         char prefix;
 777
 778         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 779                 return -1;
 780
 781         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 782         if (ie == NULL)
 783                 return -1;
 784         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 785                    MAC2STR(bss->bssid));
 786
 787         ssid = wpa_config_add_network(wpa_s->conf);
 788         if (ssid == NULL)
 789                 return -1;
 790         ssid->parent_cred = cred;
 791
 792         wpas_notify_network_added(wpa_s, ssid);
 793         wpa_config_set_network_defaults(ssid);
 794         ssid->priority = cred->priority;
 795         ssid->temporary = 1;
 796         ssid->ssid = os_zalloc(ie[1] + 1);
 797         if (ssid->ssid == NULL)
 798                 goto fail;
 799         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 800         ssid->ssid_len = ie[1];
 801
 802         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 803                 goto fail;
 804
 805         eap_type = EAP_TYPE_SIM;
 806         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 807                 eap_type = EAP_TYPE_AKA;
 808         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
 809                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
 810                     cred->eap_method[0].method == EAP_TYPE_AKA ||
 811                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
 812                         eap_type = cred->eap_method[0].method;
 813         }
 814
 815         switch (eap_type) {
 816         case EAP_TYPE_SIM:
 817                 prefix = '1';
 818                 res = wpa_config_set(ssid, "eap", "SIM", 0);
 819                 break;
 820         case EAP_TYPE_AKA:
 821                 prefix = '0';
 822                 res = wpa_config_set(ssid, "eap", "AKA", 0);
 823                 break;
 824         case EAP_TYPE_AKA_PRIME:
 825                 prefix = '6';
 826                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
 827                 break;
 828         default:
 829                 res = -1;
 830                 break;
 831         }
 832         if (res < 0) {
 833                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
 834                            eap_type);
 835                 goto fail;
 836         }
 837
 838         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
 839                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 840                 goto fail;
 841         }
 842
 843         if (cred->milenage && cred->milenage[0]) {
 844                 if (wpa_config_set_quoted(ssid, "password",
 845                                           cred->milenage) < 0)
 846                         goto fail;
 847         } else if (cred->pcsc) {
 848                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 849                         goto fail;
 850                 if (wpa_s->conf->pcsc_pin &&
 851                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 852                     < 0)
 853                         goto fail;
 854         }
 855
 856         if (cred->password && cred->password[0] &&
 857             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 858                 goto fail;
 859
 860         wpa_config_update_prio_list(wpa_s->conf);
 861         interworking_reconnect(wpa_s);
 862
 863         return 0;
 864
 865 fail:
 866         wpas_notify_network_removed(wpa_s, ssid);
 867         wpa_config_remove_network(wpa_s->conf, ssid->id);
 868 #endif /* INTERWORKING_3GPP */
 869         return -1;
 870 }
 871
 872
 873 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 874                                             size_t rc_len)
 875 {
 876         const u8 *pos, *end;
 877         u8 lens;
 878
 879         if (ie == NULL)
 880                 return 0;
 881
 882         pos = ie + 2;
 883         end = ie + 2 + ie[1];
 884
 885         /* Roaming Consortium element:
 886          * Number of ANQP OIs
 887          * OI #1 and #2 lengths
 888          * OI #1, [OI #2], [OI #3]
 889          */
 890
 891         if (pos + 2 > end)
 892                 return 0;
 893
 894         pos++; /* skip Number of ANQP OIs */
 895         lens = *pos++;
 896         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 897                 return 0;
 898
 899         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 900                 return 1;
 901         pos += lens & 0x0f;
 902
 903         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 904                 return 1;
 905         pos += lens >> 4;
 906
 907         if (pos < end && (size_t) (end - pos) == rc_len &&
 908             os_memcmp(pos, rc_id, rc_len) == 0)
 909                 return 1;
 910
 911         return 0;
 912 }
 913
 914
 915 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 916                                          const u8 *rc_id, size_t rc_len)
 917 {
 918         const u8 *pos, *end;
 919         u8 len;
 920
 921         if (anqp == NULL)
 922                 return 0;
 923
 924         pos = wpabuf_head(anqp);
 925         end = pos + wpabuf_len(anqp);
 926
 927         /* Set of <OI Length, OI> duples */
 928         while (pos < end) {
 929                 len = *pos++;
 930                 if (pos + len > end)
 931                         break;
 932                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 933                         return 1;
 934                 pos += len;
 935         }
 936
 937         return 0;
 938 }
 939
 940
 941 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
 942                                     const u8 *rc_id, size_t rc_len)
 943 {
 944         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
 945                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
 946 }
 947
 948
 949 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
 950 {
 951         const u8 *ie;
 952
 953         if (cred->required_roaming_consortium_len == 0)
 954                 return 0;
 955
 956         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 957
 958         if (ie == NULL &&
 959             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 960                 return 1;
 961
 962         return !roaming_consortium_match(ie,
 963                                          bss->anqp ?
 964                                          bss->anqp->roaming_consortium : NULL,
 965                                          cred->required_roaming_consortium,
 966                                          cred->required_roaming_consortium_len);
 967 }
 968
 969
 970 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
 971 {
 972         size_t i;
 973
 974         if (!cred->excluded_ssid)
 975                 return 0;
 976
 977         for (i = 0; i < cred->num_excluded_ssid; i++) {
 978                 struct excluded_ssid *e = &cred->excluded_ssid[i];
 979                 if (bss->ssid_len == e->ssid_len &&
 980                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
 981                         return 1;
 982         }
 983
 984         return 0;
 985 }
 986
 987
 988 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 989         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 990 {
 991         struct wpa_cred *cred, *selected = NULL;
 992         const u8 *ie;
 993
 994         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 995
 996         if (ie == NULL &&
 997             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 998                 return NULL;
 999
1000         if (wpa_s->conf->cred == NULL)
1001                 return NULL;
1002
1003         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1004                 if (cred->roaming_consortium_len == 0)
1005                         continue;
1006
1007                 if (!roaming_consortium_match(ie,
1008                                               bss->anqp ?
1009                                               bss->anqp->roaming_consortium :
1010                                               NULL,
1011                                               cred->roaming_consortium,
1012                                               cred->roaming_consortium_len))
1013                         continue;
1014
1015                 if (cred_excluded_ssid(cred, bss))
1016                         continue;
1017                 if (cred_no_required_oi_match(cred, bss))
1018                         continue;
1019
1020                 if (selected == NULL ||
1021                     selected->priority < cred->priority)
1022                         selected = cred;
1023         }
1024
1025         return selected;
1026 }
1027
1028
1029 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1030                                        struct wpa_cred *cred, int ttls)
1031 {
1032         if (cred->eap_method) {
1033                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1034                         cred->eap_method->method == EAP_TYPE_TTLS;
1035
1036                 os_free(ssid->eap.eap_methods);
1037                 ssid->eap.eap_methods =
1038                         os_malloc(sizeof(struct eap_method_type) * 2);
1039                 if (ssid->eap.eap_methods == NULL)
1040                         return -1;
1041                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1042                           sizeof(*cred->eap_method));
1043                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1044                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1045         }
1046
1047         if (ttls && cred->username && cred->username[0]) {
1048                 const char *pos;
1049                 char *anon;
1050                 /* Use anonymous NAI in Phase 1 */
1051                 pos = os_strchr(cred->username, '@');
1052                 if (pos) {
1053                         size_t buflen = 9 + os_strlen(pos) + 1;
1054                         anon = os_malloc(buflen);
1055                         if (anon == NULL)
1056                                 return -1;
1057                         os_snprintf(anon, buflen, "anonymous%s", pos);
1058                 } else if (cred->realm) {
1059                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1060                         anon = os_malloc(buflen);
1061                         if (anon == NULL)
1062                                 return -1;
1063                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1064                 } else {
1065                         anon = os_strdup("anonymous");
1066                         if (anon == NULL)
1067                                 return -1;
1068                 }
1069                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1070                     0) {
1071                         os_free(anon);
1072                         return -1;
1073                 }
1074                 os_free(anon);
1075         }
1076
1077         if (cred->username && cred->username[0] &&
1078             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1079                 return -1;
1080
1081         if (cred->password && cred->password[0]) {
1082                 if (cred->ext_password &&
1083                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1084                         return -1;
1085                 if (!cred->ext_password &&
1086                     wpa_config_set_quoted(ssid, "password", cred->password) <
1087                     0)
1088                         return -1;
1089         }
1090
1091         if (cred->client_cert && cred->client_cert[0] &&
1092             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1093                 return -1;
1094
1095 #ifdef ANDROID
1096         if (cred->private_key &&
1097             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1098                 /* Use OpenSSL engine configuration for Android keystore */
1099                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1100                     wpa_config_set_quoted(ssid, "key_id",
1101                                           cred->private_key + 11) < 0 ||
1102                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1103                         return -1;
1104         } else
1105 #endif /* ANDROID */
1106         if (cred->private_key && cred->private_key[0] &&
1107             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1108                 return -1;
1109
1110         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1111             wpa_config_set_quoted(ssid, "private_key_passwd",
1112                                   cred->private_key_passwd) < 0)
1113                 return -1;
1114
1115         if (cred->phase1) {
1116                 os_free(ssid->eap.phase1);
1117                 ssid->eap.phase1 = os_strdup(cred->phase1);
1118         }
1119         if (cred->phase2) {
1120                 os_free(ssid->eap.phase2);
1121                 ssid->eap.phase2 = os_strdup(cred->phase2);
1122         }
1123
1124         if (cred->ca_cert && cred->ca_cert[0] &&
1125             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1126                 return -1;
1127
1128         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1129             wpa_config_set_quoted(ssid, "domain_suffix_match",
1130                                   cred->domain_suffix_match) < 0)
1131                 return -1;
1132
1133         return 0;
1134 }
1135
1136
1137 static int interworking_connect_roaming_consortium(
1138         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1139         struct wpa_bss *bss, const u8 *ssid_ie)
1140 {
1141         struct wpa_ssid *ssid;
1142
1143         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1144                    "roaming consortium match", MAC2STR(bss->bssid));
1145
1146         ssid = wpa_config_add_network(wpa_s->conf);
1147         if (ssid == NULL)
1148                 return -1;
1149         ssid->parent_cred = cred;
1150         wpas_notify_network_added(wpa_s, ssid);
1151         wpa_config_set_network_defaults(ssid);
1152         ssid->priority = cred->priority;
1153         ssid->temporary = 1;
1154         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1155         if (ssid->ssid == NULL)
1156                 goto fail;
1157         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1158         ssid->ssid_len = ssid_ie[1];
1159
1160         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1161                 goto fail;
1162
1163         if (cred->eap_method == NULL) {
1164                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1165                            "credential using roaming consortium");
1166                 goto fail;
1167         }
1168
1169         if (interworking_set_eap_params(
1170                     ssid, cred,
1171                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1172                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1173                 goto fail;
1174
1175         wpa_config_update_prio_list(wpa_s->conf);
1176         interworking_reconnect(wpa_s);
1177
1178         return 0;
1179
1180 fail:
1181         wpas_notify_network_removed(wpa_s, ssid);
1182         wpa_config_remove_network(wpa_s->conf, ssid->id);
1183         return -1;
1184 }
1185
1186
1187 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1188 {
1189         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1190         struct wpa_ssid *ssid;
1191         struct nai_realm *realm;
1192         struct nai_realm_eap *eap = NULL;
1193         u16 count, i;
1194         char buf[100];
1195         const u8 *ie;
1196
1197         if (wpa_s->conf->cred == NULL || bss == NULL)
1198                 return -1;
1199         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1200         if (ie == NULL || ie[1] == 0) {
1201                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1202                            MACSTR, MAC2STR(bss->bssid));
1203                 return -1;
1204         }
1205
1206         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1207                 /*
1208                  * We currently support only HS 2.0 networks and those are
1209                  * required to use WPA2-Enterprise.
1210                  */
1211                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1212                            "RSN");
1213                 return -1;
1214         }
1215
1216         cred_rc = interworking_credentials_available_roaming_consortium(wpa_s,
1217                                                                         bss);
1218         if (cred_rc) {
1219                 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1220                            "consortium matching credential priority %d",
1221                            cred_rc->priority);
1222         }
1223
1224         cred = interworking_credentials_available_realm(wpa_s, bss);
1225         if (cred) {
1226                 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
1227                            "matching credential priority %d",
1228                            cred->priority);
1229         }
1230
1231         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss);
1232         if (cred_3gpp) {
1233                 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
1234                            "credential priority %d", cred_3gpp->priority);
1235         }
1236
1237         if (cred_rc &&
1238             (cred == NULL || cred_rc->priority >= cred->priority) &&
1239             (cred_3gpp == NULL || cred_rc->priority >= cred_3gpp->priority))
1240                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1241                                                                bss, ie);
1242
1243         if (cred_3gpp &&
1244             (cred == NULL || cred_3gpp->priority >= cred->priority)) {
1245                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
1246         }
1247
1248         if (cred == NULL) {
1249                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1250                            "found for " MACSTR, MAC2STR(bss->bssid));
1251                 return -1;
1252         }
1253
1254         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1255                                 &count);
1256         if (realm == NULL) {
1257                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1258                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1259                 return -1;
1260         }
1261
1262         for (i = 0; i < count; i++) {
1263                 if (!nai_realm_match(&realm[i], cred->realm))
1264                         continue;
1265                 eap = nai_realm_find_eap(cred, &realm[i]);
1266                 if (eap)
1267                         break;
1268         }
1269
1270         if (!eap) {
1271                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1272                            "and EAP method found for " MACSTR,
1273                            MAC2STR(bss->bssid));
1274                 nai_realm_free(realm, count);
1275                 return -1;
1276         }
1277
1278         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1279                    MAC2STR(bss->bssid));
1280
1281         ssid = wpa_config_add_network(wpa_s->conf);
1282         if (ssid == NULL) {
1283                 nai_realm_free(realm, count);
1284                 return -1;
1285         }
1286         ssid->parent_cred = cred;
1287         wpas_notify_network_added(wpa_s, ssid);
1288         wpa_config_set_network_defaults(ssid);
1289         ssid->priority = cred->priority;
1290         ssid->temporary = 1;
1291         ssid->ssid = os_zalloc(ie[1] + 1);
1292         if (ssid->ssid == NULL)
1293                 goto fail;
1294         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1295         ssid->ssid_len = ie[1];
1296
1297         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1298                 goto fail;
1299
1300         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1301                                                      eap->method), 0) < 0)
1302                 goto fail;
1303
1304         switch (eap->method) {
1305         case EAP_TYPE_TTLS:
1306                 if (eap->inner_method) {
1307                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1308                                     eap_get_name(EAP_VENDOR_IETF,
1309                                                  eap->inner_method));
1310                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1311                                 goto fail;
1312                         break;
1313                 }
1314                 switch (eap->inner_non_eap) {
1315                 case NAI_REALM_INNER_NON_EAP_PAP:
1316                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1317                             0)
1318                                 goto fail;
1319                         break;
1320                 case NAI_REALM_INNER_NON_EAP_CHAP:
1321                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1322                             < 0)
1323                                 goto fail;
1324                         break;
1325                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1326                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1327                                            0) < 0)
1328                                 goto fail;
1329                         break;
1330                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1331                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1332                                            0) < 0)
1333                                 goto fail;
1334                         break;
1335                 default:
1336                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1337                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1338                                            0) < 0)
1339                                 goto fail;
1340                         break;
1341                 }
1342                 break;
1343         case EAP_TYPE_PEAP:
1344                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1345                             eap_get_name(EAP_VENDOR_IETF,
1346                                          eap->inner_method ?
1347                                          eap->inner_method :
1348                                          EAP_TYPE_MSCHAPV2));
1349                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1350                         goto fail;
1351                 break;
1352         case EAP_TYPE_TLS:
1353                 break;
1354         }
1355
1356         if (interworking_set_eap_params(ssid, cred,
1357                                         eap->method == EAP_TYPE_TTLS) < 0)
1358                 goto fail;
1359
1360         nai_realm_free(realm, count);
1361
1362         wpa_config_update_prio_list(wpa_s->conf);
1363         interworking_reconnect(wpa_s);
1364
1365         return 0;
1366
1367 fail:
1368         wpas_notify_network_removed(wpa_s, ssid);
1369         wpa_config_remove_network(wpa_s->conf, ssid->id);
1370         nai_realm_free(realm, count);
1371         return -1;
1372 }
1373
1374
1375 static struct wpa_cred * interworking_credentials_available_3gpp(
1376         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1377 {
1378         struct wpa_cred *selected = NULL;
1379 #ifdef INTERWORKING_3GPP
1380         struct wpa_cred *cred;
1381         int ret;
1382
1383         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1384                 return NULL;
1385
1386         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1387                 char *sep;
1388                 const char *imsi;
1389                 int mnc_len;
1390                 char imsi_buf[16];
1391                 size_t msin_len;
1392
1393 #ifdef PCSC_FUNCS
1394                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1395                     wpa_s->imsi[0]) {
1396                         imsi = wpa_s->imsi;
1397                         mnc_len = wpa_s->mnc_len;
1398                         goto compare;
1399                 }
1400 #endif /* PCSC_FUNCS */
1401 #ifdef CONFIG_EAP_PROXY
1402                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1403                         imsi = wpa_s->imsi;
1404                         mnc_len = wpa_s->mnc_len;
1405                         goto compare;
1406                 }
1407 #endif /* CONFIG_EAP_PROXY */
1408
1409                 if (cred->imsi == NULL || !cred->imsi[0] ||
1410                     (!wpa_s->conf->external_sim &&
1411                      (cred->milenage == NULL || !cred->milenage[0])))
1412                         continue;
1413
1414                 sep = os_strchr(cred->imsi, '-');
1415                 if (sep == NULL ||
1416                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1417                         continue;
1418                 mnc_len = sep - cred->imsi - 3;
1419                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1420                 sep++;
1421                 msin_len = os_strlen(cred->imsi);
1422                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1423                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1424                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1425                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1426                 imsi = imsi_buf;
1427
1428 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1429         compare:
1430 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1431                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1432                            MACSTR, MAC2STR(bss->bssid));
1433                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1434                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1435                 if (ret) {
1436                         if (cred_excluded_ssid(cred, bss))
1437                                 continue;
1438                         if (cred_no_required_oi_match(cred, bss))
1439                                 continue;
1440                         if (selected == NULL ||
1441                             selected->priority < cred->priority)
1442                                 selected = cred;
1443                 }
1444         }
1445 #endif /* INTERWORKING_3GPP */
1446         return selected;
1447 }
1448
1449
1450 static struct wpa_cred * interworking_credentials_available_realm(
1451         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1452 {
1453         struct wpa_cred *cred, *selected = NULL;
1454         struct nai_realm *realm;
1455         u16 count, i;
1456
1457         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1458                 return NULL;
1459
1460         if (wpa_s->conf->cred == NULL)
1461                 return NULL;
1462
1463         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1464                    MACSTR, MAC2STR(bss->bssid));
1465         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1466         if (realm == NULL) {
1467                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1468                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1469                 return NULL;
1470         }
1471
1472         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1473                 if (cred->realm == NULL)
1474                         continue;
1475
1476                 for (i = 0; i < count; i++) {
1477                         if (!nai_realm_match(&realm[i], cred->realm))
1478                                 continue;
1479                         if (nai_realm_find_eap(cred, &realm[i])) {
1480                                 if (cred_excluded_ssid(cred, bss))
1481                                         continue;
1482                                 if (cred_no_required_oi_match(cred, bss))
1483                                         continue;
1484                                 if (selected == NULL ||
1485                                     selected->priority < cred->priority)
1486                                         selected = cred;
1487                                 break;
1488                         }
1489                 }
1490         }
1491
1492         nai_realm_free(realm, count);
1493
1494         return selected;
1495 }
1496
1497
1498 static struct wpa_cred * interworking_credentials_available(
1499         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1500 {
1501         struct wpa_cred *cred, *cred2;
1502
1503         cred = interworking_credentials_available_realm(wpa_s, bss);
1504         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1505         if (cred && cred2 && cred2->priority >= cred->priority)
1506                 cred = cred2;
1507         if (!cred)
1508                 cred = cred2;
1509
1510         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1511                                                                       bss);
1512         if (cred && cred2 && cred2->priority >= cred->priority)
1513                 cred = cred2;
1514         if (!cred)
1515                 cred = cred2;
1516
1517         return cred;
1518 }
1519
1520
1521 static int domain_name_list_contains(struct wpabuf *domain_names,
1522                                      const char *domain)
1523 {
1524         const u8 *pos, *end;
1525         size_t len;
1526
1527         len = os_strlen(domain);
1528         pos = wpabuf_head(domain_names);
1529         end = pos + wpabuf_len(domain_names);
1530
1531         while (pos + 1 < end) {
1532                 if (pos + 1 + pos[0] > end)
1533                         break;
1534
1535                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1536                                   pos + 1, pos[0]);
1537                 if (pos[0] == len &&
1538                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1539                         return 1;
1540
1541                 pos += 1 + pos[0];
1542         }
1543
1544         return 0;
1545 }
1546
1547
1548 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
1549                               struct wpa_cred *cred,
1550                               struct wpabuf *domain_names)
1551 {
1552         size_t i;
1553         int ret = -1;
1554 #ifdef INTERWORKING_3GPP
1555         char nai[100], *realm;
1556
1557         char *imsi = NULL;
1558         int mnc_len = 0;
1559         if (cred->imsi)
1560                 imsi = cred->imsi;
1561 #ifdef CONFIG_PCSC
1562         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1563                  wpa_s->scard && wpa_s->imsi[0]) {
1564                 imsi = wpa_s->imsi;
1565                 mnc_len = wpa_s->mnc_len;
1566         }
1567 #endif /* CONFIG_PCSC */
1568 #ifdef CONFIG_EAP_PROXY
1569         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1570                 imsi = wpa_s->imsi;
1571                 mnc_len = wpa_s->mnc_len;
1572         }
1573 #endif /* CONFIG_EAP_PROXY */
1574         if (domain_names &&
1575             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
1576                 realm = os_strchr(nai, '@');
1577                 if (realm)
1578                         realm++;
1579                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1580                            "with SIM/USIM domain %s", realm);
1581                 if (realm &&
1582                     domain_name_list_contains(domain_names, realm))
1583                         return 1;
1584                 if (realm)
1585                         ret = 0;
1586         }
1587 #endif /* INTERWORKING_3GPP */
1588
1589         if (domain_names == NULL || cred->domain == NULL)
1590                 return ret;
1591
1592         for (i = 0; i < cred->num_domain; i++) {
1593                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1594                            "home SP FQDN %s", cred->domain[i]);
1595                 if (domain_name_list_contains(domain_names, cred->domain[i]))
1596                         return 1;
1597         }
1598
1599         return 0;
1600 }
1601
1602
1603 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1604                                 struct wpabuf *domain_names)
1605 {
1606         struct wpa_cred *cred;
1607
1608         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1609                 return -1;
1610
1611         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1612                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
1613                 if (res)
1614                         return res;
1615         }
1616
1617         return 0;
1618 }
1619
1620
1621 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1622 {
1623         struct wpa_bss *bss;
1624         struct wpa_ssid *ssid;
1625
1626         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1627                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1628                         if (wpas_network_disabled(wpa_s, ssid) ||
1629                             ssid->mode != WPAS_MODE_INFRA)
1630                                 continue;
1631                         if (ssid->ssid_len != bss->ssid_len ||
1632                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1633                             0)
1634                                 continue;
1635                         /*
1636                          * TODO: Consider more accurate matching of security
1637                          * configuration similarly to what is done in events.c
1638                          */
1639                         return 1;
1640                 }
1641         }
1642
1643         return 0;
1644 }
1645
1646
1647 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1648 {
1649         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1650         int selected_prio = -999999, selected_home_prio = -999999;
1651         unsigned int count = 0;
1652         const char *type;
1653         int res;
1654         struct wpa_cred *cred;
1655
1656         wpa_s->network_select = 0;
1657
1658         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1659                 cred = interworking_credentials_available(wpa_s, bss);
1660                 if (!cred)
1661                         continue;
1662                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1663                         /*
1664                          * We currently support only HS 2.0 networks and those
1665                          * are required to use WPA2-Enterprise.
1666                          */
1667                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1668                                    "with " MACSTR " but network does not use "
1669                                    "RSN", MAC2STR(bss->bssid));
1670                         continue;
1671                 }
1672                 count++;
1673                 res = interworking_home_sp(wpa_s, bss->anqp ?
1674                                            bss->anqp->domain_name : NULL);
1675                 if (res > 0)
1676                         type = "home";
1677                 else if (res == 0)
1678                         type = "roaming";
1679                 else
1680                         type = "unknown";
1681                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1682                         MAC2STR(bss->bssid), type);
1683                 if (wpa_s->auto_select ||
1684                     (wpa_s->conf->auto_interworking &&
1685                      wpa_s->auto_network_select)) {
1686                         if (selected == NULL ||
1687                             cred->priority > selected_prio) {
1688                                 selected = bss;
1689                                 selected_prio = cred->priority;
1690                         }
1691                         if (res > 0 &&
1692                             (selected_home == NULL ||
1693                              cred->priority > selected_home_prio)) {
1694                                 selected_home = bss;
1695                                 selected_home_prio = cred->priority;
1696                         }
1697                 }
1698         }
1699
1700         if (selected_home && selected_home != selected &&
1701             selected_home_prio >= selected_prio) {
1702                 /* Prefer network operated by the Home SP */
1703                 selected = selected_home;
1704         }
1705
1706         if (count == 0) {
1707                 /*
1708                  * No matching network was found based on configured
1709                  * credentials. Check whether any of the enabled network blocks
1710                  * have matching APs.
1711                  */
1712                 if (interworking_find_network_match(wpa_s)) {
1713                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1714                                    "match for enabled network configurations");
1715                         if (wpa_s->auto_select)
1716                                 interworking_reconnect(wpa_s);
1717                         return;
1718                 }
1719
1720                 if (wpa_s->auto_network_select) {
1721                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1722                                    "scanning after ANQP fetch");
1723                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1724                                                 0);
1725                         return;
1726                 }
1727
1728                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1729                         "with matching credentials found");
1730         }
1731
1732         if (selected)
1733                 interworking_connect(wpa_s, selected);
1734 }
1735
1736
1737 static struct wpa_bss_anqp *
1738 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1739 {
1740         struct wpa_bss *other;
1741
1742         if (is_zero_ether_addr(bss->hessid))
1743                 return NULL; /* Cannot be in the same homegenous ESS */
1744
1745         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1746                 if (other == bss)
1747                         continue;
1748                 if (other->anqp == NULL)
1749                         continue;
1750                 if (other->anqp->roaming_consortium == NULL &&
1751                     other->anqp->nai_realm == NULL &&
1752                     other->anqp->anqp_3gpp == NULL &&
1753                     other->anqp->domain_name == NULL)
1754                         continue;
1755                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1756                         continue;
1757                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1758                         continue;
1759                 if (bss->ssid_len != other->ssid_len ||
1760                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1761                         continue;
1762
1763                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1764                            "already fetched BSSID " MACSTR " and " MACSTR,
1765                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1766                 other->anqp->users++;
1767                 return other->anqp;
1768         }
1769
1770         return NULL;
1771 }
1772
1773
1774 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1775 {
1776         struct wpa_bss *bss;
1777         int found = 0;
1778         const u8 *ie;
1779
1780         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress)
1781                 return;
1782
1783         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1784                 if (!(bss->caps & IEEE80211_CAP_ESS))
1785                         continue;
1786                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1787                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1788                         continue; /* AP does not support Interworking */
1789
1790                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1791                         if (bss->anqp == NULL) {
1792                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1793                                                                          bss);
1794                                 if (bss->anqp) {
1795                                         /* Shared data already fetched */
1796                                         continue;
1797                                 }
1798                                 bss->anqp = wpa_bss_anqp_alloc();
1799                                 if (bss->anqp == NULL)
1800                                         break;
1801                         }
1802                         found++;
1803                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1804                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1805                                 MACSTR, MAC2STR(bss->bssid));
1806                         interworking_anqp_send_req(wpa_s, bss);
1807                         break;
1808                 }
1809         }
1810
1811         if (found == 0) {
1812                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1813                 wpa_s->fetch_anqp_in_progress = 0;
1814                 if (wpa_s->network_select)
1815                         interworking_select_network(wpa_s);
1816         }
1817 }
1818
1819
1820 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1821 {
1822         struct wpa_bss *bss;
1823
1824         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1825                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1826
1827         wpa_s->fetch_anqp_in_progress = 1;
1828         interworking_next_anqp_fetch(wpa_s);
1829 }
1830
1831
1832 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1833 {
1834         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1835                 return 0;
1836
1837         wpa_s->network_select = 0;
1838         wpa_s->fetch_all_anqp = 1;
1839
1840         interworking_start_fetch_anqp(wpa_s);
1841
1842         return 0;
1843 }
1844
1845
1846 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1847 {
1848         if (!wpa_s->fetch_anqp_in_progress)
1849                 return;
1850
1851         wpa_s->fetch_anqp_in_progress = 0;
1852 }
1853
1854
1855 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1856                   u16 info_ids[], size_t num_ids)
1857 {
1858         struct wpabuf *buf;
1859         int ret = 0;
1860         int freq;
1861         struct wpa_bss *bss;
1862         int res;
1863
1864         freq = wpa_s->assoc_freq;
1865         bss = wpa_bss_get_bssid(wpa_s, dst);
1866         if (bss) {
1867                 wpa_bss_anqp_unshare_alloc(bss);
1868                 freq = bss->freq;
1869         }
1870         if (freq <= 0)
1871                 return -1;
1872
1873         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1874                    MAC2STR(dst), (unsigned int) num_ids);
1875
1876         buf = anqp_build_req(info_ids, num_ids, NULL);
1877         if (buf == NULL)
1878                 return -1;
1879
1880         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1881         if (res < 0) {
1882                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1883                 wpabuf_free(buf);
1884                 ret = -1;
1885         } else
1886                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1887                            "%u", res);
1888
1889         return ret;
1890 }
1891
1892
1893 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1894                                             struct wpa_bss *bss, const u8 *sa,
1895                                             u16 info_id,
1896                                             const u8 *data, size_t slen)
1897 {
1898         const u8 *pos = data;
1899         struct wpa_bss_anqp *anqp = NULL;
1900 #ifdef CONFIG_HS20
1901         u8 type;
1902 #endif /* CONFIG_HS20 */
1903
1904         if (bss)
1905                 anqp = bss->anqp;
1906
1907         switch (info_id) {
1908         case ANQP_CAPABILITY_LIST:
1909                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1910                         " ANQP Capability list", MAC2STR(sa));
1911                 break;
1912         case ANQP_VENUE_NAME:
1913                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1914                         " Venue Name", MAC2STR(sa));
1915                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1916                 if (anqp) {
1917                         wpabuf_free(anqp->venue_name);
1918                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1919                 }
1920                 break;
1921         case ANQP_NETWORK_AUTH_TYPE:
1922                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1923                         " Network Authentication Type information",
1924                         MAC2STR(sa));
1925                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1926                                   "Type", pos, slen);
1927                 if (anqp) {
1928                         wpabuf_free(anqp->network_auth_type);
1929                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1930                 }
1931                 break;
1932         case ANQP_ROAMING_CONSORTIUM:
1933                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1934                         " Roaming Consortium list", MAC2STR(sa));
1935                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1936                                   pos, slen);
1937                 if (anqp) {
1938                         wpabuf_free(anqp->roaming_consortium);
1939                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1940                 }
1941                 break;
1942         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1943                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1944                         " IP Address Type Availability information",
1945                         MAC2STR(sa));
1946                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1947                             pos, slen);
1948                 if (anqp) {
1949                         wpabuf_free(anqp->ip_addr_type_availability);
1950                         anqp->ip_addr_type_availability =
1951                                 wpabuf_alloc_copy(pos, slen);
1952                 }
1953                 break;
1954         case ANQP_NAI_REALM:
1955                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1956                         " NAI Realm list", MAC2STR(sa));
1957                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1958                 if (anqp) {
1959                         wpabuf_free(anqp->nai_realm);
1960                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1961                 }
1962                 break;
1963         case ANQP_3GPP_CELLULAR_NETWORK:
1964                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1965                         " 3GPP Cellular Network information", MAC2STR(sa));
1966                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1967                                   pos, slen);
1968                 if (anqp) {
1969                         wpabuf_free(anqp->anqp_3gpp);
1970                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1971                 }
1972                 break;
1973         case ANQP_DOMAIN_NAME:
1974                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1975                         " Domain Name list", MAC2STR(sa));
1976                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1977                 if (anqp) {
1978                         wpabuf_free(anqp->domain_name);
1979                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1980                 }
1981                 break;
1982         case ANQP_VENDOR_SPECIFIC:
1983                 if (slen < 3)
1984                         return;
1985
1986                 switch (WPA_GET_BE24(pos)) {
1987 #ifdef CONFIG_HS20
1988                 case OUI_WFA:
1989                         pos += 3;
1990                         slen -= 3;
1991
1992                         if (slen < 1)
1993                                 return;
1994                         type = *pos++;
1995                         slen--;
1996
1997                         switch (type) {
1998                         case HS20_ANQP_OUI_TYPE:
1999                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
2000                                                              slen);
2001                                 break;
2002                         default:
2003                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
2004                                            "vendor type %u", type);
2005                                 break;
2006                         }
2007                         break;
2008 #endif /* CONFIG_HS20 */
2009                 default:
2010                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
2011                                    "vendor-specific ANQP OUI %06x",
2012                                    WPA_GET_BE24(pos));
2013                         return;
2014                 }
2015                 break;
2016         default:
2017                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
2018                            "%u", info_id);
2019                 break;
2020         }
2021 }
2022
2023
2024 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2025                   enum gas_query_result result,
2026                   const struct wpabuf *adv_proto,
2027                   const struct wpabuf *resp, u16 status_code)
2028 {
2029         struct wpa_supplicant *wpa_s = ctx;
2030         const u8 *pos;
2031         const u8 *end;
2032         u16 info_id;
2033         u16 slen;
2034         struct wpa_bss *bss = NULL, *tmp;
2035
2036         if (result != GAS_QUERY_SUCCESS)
2037                 return;
2038
2039         pos = wpabuf_head(adv_proto);
2040         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2041             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2042                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
2043                            "Protocol in response");
2044                 return;
2045         }
2046
2047         /*
2048          * If possible, select the BSS entry based on which BSS entry was used
2049          * for the request. This can help in cases where multiple BSS entries
2050          * may exist for the same AP.
2051          */
2052         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2053                 if (tmp == wpa_s->interworking_gas_bss &&
2054                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2055                         bss = tmp;
2056                         break;
2057                 }
2058         }
2059         if (bss == NULL)
2060                 bss = wpa_bss_get_bssid(wpa_s, dst);
2061
2062         pos = wpabuf_head(resp);
2063         end = pos + wpabuf_len(resp);
2064
2065         while (pos < end) {
2066                 if (pos + 4 > end) {
2067                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
2068                         break;
2069                 }
2070                 info_id = WPA_GET_LE16(pos);
2071                 pos += 2;
2072                 slen = WPA_GET_LE16(pos);
2073                 pos += 2;
2074                 if (pos + slen > end) {
2075                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
2076                                    "for Info ID %u", info_id);
2077                         break;
2078                 }
2079                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2080                                                 slen);
2081                 pos += slen;
2082         }
2083 }
2084
2085
2086 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2087                                           struct wpa_scan_results *scan_res)
2088 {
2089         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2090                    "ANQP fetch");
2091         interworking_start_fetch_anqp(wpa_s);
2092 }
2093
2094
2095 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
2096 {
2097         interworking_stop_fetch_anqp(wpa_s);
2098         wpa_s->network_select = 1;
2099         wpa_s->auto_network_select = 0;
2100         wpa_s->auto_select = !!auto_select;
2101         wpa_s->fetch_all_anqp = 0;
2102         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2103                    "selection");
2104         wpa_s->scan_res_handler = interworking_scan_res_handler;
2105         wpa_s->normal_scans = 0;
2106         wpa_s->scan_req = MANUAL_SCAN_REQ;
2107         wpa_s->after_wps = 0;
2108         wpa_s->known_wps_freq = 0;
2109         wpa_supplicant_req_scan(wpa_s, 0, 0);
2110
2111         return 0;
2112 }
2113
2114
2115 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2116                         enum gas_query_result result,
2117                         const struct wpabuf *adv_proto,
2118                         const struct wpabuf *resp, u16 status_code)
2119 {
2120         struct wpa_supplicant *wpa_s = ctx;
2121
2122         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2123                 " dialog_token=%d status_code=%d resp_len=%d",
2124                 MAC2STR(addr), dialog_token, status_code,
2125                 resp ? (int) wpabuf_len(resp) : -1);
2126         if (!resp)
2127                 return;
2128
2129         wpabuf_free(wpa_s->last_gas_resp);
2130         wpa_s->last_gas_resp = wpabuf_dup(resp);
2131         if (wpa_s->last_gas_resp == NULL)
2132                 return;
2133         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2134         wpa_s->last_gas_dialog_token = dialog_token;
2135 }
2136
2137
2138 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2139                      const struct wpabuf *adv_proto,
2140                      const struct wpabuf *query)
2141 {
2142         struct wpabuf *buf;
2143         int ret = 0;
2144         int freq;
2145         struct wpa_bss *bss;
2146         int res;
2147         size_t len;
2148         u8 query_resp_len_limit = 0, pame_bi = 0;
2149
2150         freq = wpa_s->assoc_freq;
2151         bss = wpa_bss_get_bssid(wpa_s, dst);
2152         if (bss)
2153                 freq = bss->freq;
2154         if (freq <= 0)
2155                 return -1;
2156
2157         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2158                    MAC2STR(dst), freq);
2159         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2160         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2161
2162         len = 3 + wpabuf_len(adv_proto) + 2;
2163         if (query)
2164                 len += wpabuf_len(query);
2165         buf = gas_build_initial_req(0, len);
2166         if (buf == NULL)
2167                 return -1;
2168
2169         /* Advertisement Protocol IE */
2170         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2171         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2172         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2173                       (pame_bi ? 0x80 : 0));
2174         wpabuf_put_buf(buf, adv_proto);
2175
2176         /* GAS Query */
2177         if (query) {
2178                 wpabuf_put_le16(buf, wpabuf_len(query));
2179                 wpabuf_put_buf(buf, query);
2180         } else
2181                 wpabuf_put_le16(buf, 0);
2182
2183         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2184         if (res < 0) {
2185                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2186                 wpabuf_free(buf);
2187                 ret = -1;
2188         } else
2189                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2190                            "%u", res);
2191
2192         return ret;
2193 }