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 "eapol_supp/eapol_supp_sm.h"
  22 #include "wpa_supplicant_i.h"
  23 #include "config.h"
  24 #include "config_ssid.h"
  25 #include "bss.h"
  26 #include "scan.h"
  27 #include "notify.h"
  28 #include "gas_query.h"
  29 #include "hs20_supplicant.h"
  30 #include "interworking.h"
  31
  32
  33 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  34 #define INTERWORKING_3GPP
  35 #else
  36 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  37 #define INTERWORKING_3GPP
  38 #else
  39 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  40 #define INTERWORKING_3GPP
  41 #endif
  42 #endif
  43 #endif
  44
  45 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  46 static struct wpa_cred * interworking_credentials_available_realm(
  47         struct wpa_supplicant *wpa_s, struct wpa_bss *bss);
  48 static struct wpa_cred * interworking_credentials_available_3gpp(
  49         struct wpa_supplicant *wpa_s, struct wpa_bss *bss);
  50
  51
  52 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  53 {
  54         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  55                 wpa_supplicant_cancel_sched_scan(wpa_s);
  56                 wpa_supplicant_deauthenticate(wpa_s,
  57                                               WLAN_REASON_DEAUTH_LEAVING);
  58         }
  59         wpa_s->disconnected = 0;
  60         wpa_s->reassociate = 1;
  61
  62         if (wpa_supplicant_fast_associate(wpa_s) >= 0)
  63                 return;
  64
  65         wpa_supplicant_req_scan(wpa_s, 0, 0);
  66 }
  67
  68
  69 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  70                                       struct wpabuf *extra)
  71 {
  72         struct wpabuf *buf;
  73         size_t i;
  74         u8 *len_pos;
  75
  76         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  77                                          (extra ? wpabuf_len(extra) : 0));
  78         if (buf == NULL)
  79                 return NULL;
  80
  81         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  82         for (i = 0; i < num_ids; i++)
  83                 wpabuf_put_le16(buf, info_ids[i]);
  84         gas_anqp_set_element_len(buf, len_pos);
  85         if (extra)
  86                 wpabuf_put_buf(buf, extra);
  87
  88         gas_anqp_set_len(buf);
  89
  90         return buf;
  91 }
  92
  93
  94 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  95                                       u8 dialog_token,
  96                                       enum gas_query_result result,
  97                                       const struct wpabuf *adv_proto,
  98                                       const struct wpabuf *resp,
  99                                       u16 status_code)
 100 {
 101         struct wpa_supplicant *wpa_s = ctx;
 102
 103         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 104                      status_code);
 105         interworking_next_anqp_fetch(wpa_s);
 106 }
 107
 108
 109 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 110 {
 111         struct wpa_cred *cred;
 112
 113         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 114                 if (cred->roaming_consortium_len)
 115                         return 1;
 116                 if (cred->required_roaming_consortium_len)
 117                         return 1;
 118         }
 119         return 0;
 120 }
 121
 122
 123 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 124 {
 125         struct wpa_cred *cred;
 126
 127         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 128                 if (cred->pcsc || cred->imsi)
 129                         return 1;
 130         }
 131         return 0;
 132 }
 133
 134
 135 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 136 {
 137         struct wpa_cred *cred;
 138
 139         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 140                 if (cred->pcsc || cred->imsi)
 141                         continue;
 142                 if (!cred->eap_method)
 143                         return 1;
 144                 if (cred->realm && cred->roaming_consortium_len == 0)
 145                         return 1;
 146         }
 147         return 0;
 148 }
 149
 150
 151 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 152 {
 153         struct wpa_cred *cred;
 154
 155         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 156                 if (cred->domain || cred->pcsc || cred->imsi)
 157                         return 1;
 158         }
 159         return 0;
 160 }
 161
 162
 163 static int additional_roaming_consortiums(struct wpa_bss *bss)
 164 {
 165         const u8 *ie;
 166         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 167         if (ie == NULL || ie[1] == 0)
 168                 return 0;
 169         return ie[2]; /* Number of ANQP OIs */
 170 }
 171
 172
 173 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 174 {
 175         struct wpa_supplicant *wpa_s = eloop_ctx;
 176         interworking_next_anqp_fetch(wpa_s);
 177 }
 178
 179
 180 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 181                                       struct wpa_bss *bss)
 182 {
 183         struct wpabuf *buf;
 184         int ret = 0;
 185         int res;
 186         u16 info_ids[8];
 187         size_t num_info_ids = 0;
 188         struct wpabuf *extra = NULL;
 189         int all = wpa_s->fetch_all_anqp;
 190
 191         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 192                    MAC2STR(bss->bssid));
 193         wpa_s->interworking_gas_bss = bss;
 194
 195         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 196         if (all) {
 197                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 198                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 199         }
 200         if (all || (cred_with_roaming_consortium(wpa_s) &&
 201                     additional_roaming_consortiums(bss)))
 202                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 203         if (all)
 204                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 205         if (all || cred_with_nai_realm(wpa_s))
 206                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 207         if (all || cred_with_3gpp(wpa_s))
 208                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 209         if (all || cred_with_domain(wpa_s))
 210                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 211         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 212                     (u8 *) info_ids, num_info_ids * 2);
 213
 214 #ifdef CONFIG_HS20
 215         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 216                 u8 *len_pos;
 217
 218                 extra = wpabuf_alloc(100);
 219                 if (!extra)
 220                         return -1;
 221
 222                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 223                 wpabuf_put_be24(extra, OUI_WFA);
 224                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 225                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 226                 wpabuf_put_u8(extra, 0); /* Reserved */
 227                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 228                 if (all) {
 229                         wpabuf_put_u8(extra,
 230                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 231                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 232                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 233                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 234                 }
 235                 gas_anqp_set_element_len(extra, len_pos);
 236         }
 237 #endif /* CONFIG_HS20 */
 238
 239         buf = anqp_build_req(info_ids, num_info_ids, extra);
 240         wpabuf_free(extra);
 241         if (buf == NULL)
 242                 return -1;
 243
 244         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 245                             interworking_anqp_resp_cb, wpa_s);
 246         if (res < 0) {
 247                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 248                 wpabuf_free(buf);
 249                 ret = -1;
 250                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 251                                        NULL);
 252         } else
 253                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 254                            "%u", res);
 255
 256         return ret;
 257 }
 258
 259
 260 struct nai_realm_eap {
 261         u8 method;
 262         u8 inner_method;
 263         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 264         u8 cred_type;
 265         u8 tunneled_cred_type;
 266 };
 267
 268 struct nai_realm {
 269         u8 encoding;
 270         char *realm;
 271         u8 eap_count;
 272         struct nai_realm_eap *eap;
 273 };
 274
 275
 276 static void nai_realm_free(struct nai_realm *realms, u16 count)
 277 {
 278         u16 i;
 279
 280         if (realms == NULL)
 281                 return;
 282         for (i = 0; i < count; i++) {
 283                 os_free(realms[i].eap);
 284                 os_free(realms[i].realm);
 285         }
 286         os_free(realms);
 287 }
 288
 289
 290 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 291                                       const u8 *end)
 292 {
 293         u8 elen, auth_count, a;
 294         const u8 *e_end;
 295
 296         if (pos + 3 > end) {
 297                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 298                 return NULL;
 299         }
 300
 301         elen = *pos++;
 302         if (pos + elen > end || elen < 2) {
 303                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 304                 return NULL;
 305         }
 306         e_end = pos + elen;
 307         e->method = *pos++;
 308         auth_count = *pos++;
 309         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 310                    elen, e->method, auth_count);
 311
 312         for (a = 0; a < auth_count; a++) {
 313                 u8 id, len;
 314
 315                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 316                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 317                                    "Parameter subfield");
 318                         return NULL;
 319                 }
 320
 321                 id = *pos++;
 322                 len = *pos++;
 323
 324                 switch (id) {
 325                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 326                         if (len < 1)
 327                                 break;
 328                         e->inner_non_eap = *pos;
 329                         if (e->method != EAP_TYPE_TTLS)
 330                                 break;
 331                         switch (*pos) {
 332                         case NAI_REALM_INNER_NON_EAP_PAP:
 333                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 334                                 break;
 335                         case NAI_REALM_INNER_NON_EAP_CHAP:
 336                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 337                                 break;
 338                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 339                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 340                                 break;
 341                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 342                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 343                                 break;
 344                         }
 345                         break;
 346                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 347                         if (len < 1)
 348                                 break;
 349                         e->inner_method = *pos;
 350                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 351                                    e->inner_method);
 352                         break;
 353                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 354                         if (len < 1)
 355                                 break;
 356                         e->cred_type = *pos;
 357                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 358                                    e->cred_type);
 359                         break;
 360                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 361                         if (len < 1)
 362                                 break;
 363                         e->tunneled_cred_type = *pos;
 364                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 365                                    "Type: %u", e->tunneled_cred_type);
 366                         break;
 367                 default:
 368                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 369                                    "Parameter: id=%u len=%u", id, len);
 370                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 371                                     "Value", pos, len);
 372                         break;
 373                 }
 374
 375                 pos += len;
 376         }
 377
 378         return e_end;
 379 }
 380
 381
 382 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 383                                         const u8 *end)
 384 {
 385         u16 len;
 386         const u8 *f_end;
 387         u8 realm_len, e;
 388
 389         if (end - pos < 4) {
 390                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 391                            "fixed fields");
 392                 return NULL;
 393         }
 394
 395         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 396         pos += 2;
 397         if (pos + len > end || len < 3) {
 398                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 399                            "(len=%u; left=%u)",
 400                            len, (unsigned int) (end - pos));
 401                 return NULL;
 402         }
 403         f_end = pos + len;
 404
 405         r->encoding = *pos++;
 406         realm_len = *pos++;
 407         if (pos + realm_len > f_end) {
 408                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 409                            "(len=%u; left=%u)",
 410                            realm_len, (unsigned int) (f_end - pos));
 411                 return NULL;
 412         }
 413         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 414         r->realm = dup_binstr(pos, realm_len);
 415         if (r->realm == NULL)
 416                 return NULL;
 417         pos += realm_len;
 418
 419         if (pos + 1 > f_end) {
 420                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 421                 return NULL;
 422         }
 423         r->eap_count = *pos++;
 424         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 425         if (pos + r->eap_count * 3 > f_end) {
 426                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 427                 return NULL;
 428         }
 429         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 430         if (r->eap == NULL)
 431                 return NULL;
 432
 433         for (e = 0; e < r->eap_count; e++) {
 434                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 435                 if (pos == NULL)
 436                         return NULL;
 437         }
 438
 439         return f_end;
 440 }
 441
 442
 443 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 444 {
 445         struct nai_realm *realm;
 446         const u8 *pos, *end;
 447         u16 i, num;
 448
 449         if (anqp == NULL || wpabuf_len(anqp) < 2)
 450                 return NULL;
 451
 452         pos = wpabuf_head_u8(anqp);
 453         end = pos + wpabuf_len(anqp);
 454         num = WPA_GET_LE16(pos);
 455         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 456         pos += 2;
 457
 458         if (num * 5 > end - pos) {
 459                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 460                            "enough data (%u octets) for that many realms",
 461                            num, (unsigned int) (end - pos));
 462                 return NULL;
 463         }
 464
 465         realm = os_calloc(num, sizeof(struct nai_realm));
 466         if (realm == NULL)
 467                 return NULL;
 468
 469         for (i = 0; i < num; i++) {
 470                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 471                 if (pos == NULL) {
 472                         nai_realm_free(realm, num);
 473                         return NULL;
 474                 }
 475         }
 476
 477         *count = num;
 478         return realm;
 479 }
 480
 481
 482 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 483 {
 484         char *tmp, *pos, *end;
 485         int match = 0;
 486
 487         if (realm->realm == NULL || home_realm == NULL)
 488                 return 0;
 489
 490         if (os_strchr(realm->realm, ';') == NULL)
 491                 return os_strcasecmp(realm->realm, home_realm) == 0;
 492
 493         tmp = os_strdup(realm->realm);
 494         if (tmp == NULL)
 495                 return 0;
 496
 497         pos = tmp;
 498         while (*pos) {
 499                 end = os_strchr(pos, ';');
 500                 if (end)
 501                         *end = '\0';
 502                 if (os_strcasecmp(pos, home_realm) == 0) {
 503                         match = 1;
 504                         break;
 505                 }
 506                 if (end == NULL)
 507                         break;
 508                 pos = end + 1;
 509         }
 510
 511         os_free(tmp);
 512
 513         return match;
 514 }
 515
 516
 517 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 518 {
 519         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 520                 return 0; /* method not supported */
 521
 522         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 523                 /* Only tunneled methods with username/password supported */
 524                 return 0;
 525         }
 526
 527         if (eap->method == EAP_TYPE_PEAP) {
 528                 if (eap->inner_method &&
 529                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 530                         return 0;
 531                 if (!eap->inner_method &&
 532                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
 533                         return 0;
 534         }
 535
 536         if (eap->method == EAP_TYPE_TTLS) {
 537                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 538                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 539                 if (eap->inner_method &&
 540                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 541                         return 0;
 542                 if (eap->inner_non_eap &&
 543                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 544                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 545                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 546                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 547                         return 0;
 548         }
 549
 550         if (eap->inner_method &&
 551             eap->inner_method != EAP_TYPE_GTC &&
 552             eap->inner_method != EAP_TYPE_MSCHAPV2)
 553                 return 0;
 554
 555         return 1;
 556 }
 557
 558
 559 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 560 {
 561         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 562                 return 0; /* method not supported */
 563
 564         if (eap->method != EAP_TYPE_TLS) {
 565                 /* Only EAP-TLS supported for credential authentication */
 566                 return 0;
 567         }
 568
 569         return 1;
 570 }
 571
 572
 573 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 574                                                  struct nai_realm *realm)
 575 {
 576         u8 e;
 577
 578         if (cred == NULL ||
 579             cred->username == NULL ||
 580             cred->username[0] == '\0' ||
 581             ((cred->password == NULL ||
 582               cred->password[0] == '\0') &&
 583              (cred->private_key == NULL ||
 584               cred->private_key[0] == '\0')))
 585                 return NULL;
 586
 587         for (e = 0; e < realm->eap_count; e++) {
 588                 struct nai_realm_eap *eap = &realm->eap[e];
 589                 if (cred->password && cred->password[0] &&
 590                     nai_realm_cred_username(eap))
 591                         return eap;
 592                 if (cred->private_key && cred->private_key[0] &&
 593                     nai_realm_cred_cert(eap))
 594                         return eap;
 595         }
 596
 597         return NULL;
 598 }
 599
 600
 601 #ifdef INTERWORKING_3GPP
 602
 603 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 604 {
 605         u8 plmn[3], plmn2[3];
 606         const u8 *pos, *end;
 607         u8 udhl;
 608
 609         /*
 610          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 611          * operator is allowed to include only two digits of the MNC, so allow
 612          * matches based on both two and three digit MNC assumptions. Since some
 613          * SIM/USIM cards may not expose MNC length conveniently, we may be
 614          * provided the default MNC length 3 here and as such, checking with MNC
 615          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 616          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 617          * with otherwise matching values would not be good idea in general, so
 618          * this should not result in selecting incorrect networks.
 619          */
 620         /* Match with 3 digit MNC */
 621         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 622         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 623         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 624         /* Match with 2 digit MNC */
 625         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 626         plmn2[1] = (imsi[2] - '0') | 0xf0;
 627         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 628
 629         if (anqp == NULL)
 630                 return 0;
 631         pos = wpabuf_head_u8(anqp);
 632         end = pos + wpabuf_len(anqp);
 633         if (pos + 2 > end)
 634                 return 0;
 635         if (*pos != 0) {
 636                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 637                 return 0;
 638         }
 639         pos++;
 640         udhl = *pos++;
 641         if (pos + udhl > end) {
 642                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 643                 return 0;
 644         }
 645         end = pos + udhl;
 646
 647         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 648                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 649                    imsi, mnc_len);
 650
 651         while (pos + 2 <= end) {
 652                 u8 iei, len;
 653                 const u8 *l_end;
 654                 iei = *pos++;
 655                 len = *pos++ & 0x7f;
 656                 if (pos + len > end)
 657                         break;
 658                 l_end = pos + len;
 659
 660                 if (iei == 0 && len > 0) {
 661                         /* PLMN List */
 662                         u8 num, i;
 663                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 664                                     pos, len);
 665                         num = *pos++;
 666                         for (i = 0; i < num; i++) {
 667                                 if (pos + 3 > l_end)
 668                                         break;
 669                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 670                                     os_memcmp(pos, plmn2, 3) == 0)
 671                                         return 1; /* Found matching PLMN */
 672                                 pos += 3;
 673                         }
 674                 } else {
 675                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 676                                     pos, len);
 677                 }
 678
 679                 pos = l_end;
 680         }
 681
 682         return 0;
 683 }
 684
 685
 686 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 687                           size_t mnc_len, char prefix)
 688 {
 689         const char *sep, *msin;
 690         char *end, *pos;
 691         size_t msin_len, plmn_len;
 692
 693         /*
 694          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 695          * Root NAI:
 696          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 697          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 698          */
 699
 700         if (imsi == NULL || os_strlen(imsi) > 16) {
 701                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 702                 return -1;
 703         }
 704         sep = os_strchr(imsi, '-');
 705         if (sep) {
 706                 plmn_len = sep - imsi;
 707                 msin = sep + 1;
 708         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 709                 plmn_len = 3 + mnc_len;
 710                 msin = imsi + plmn_len;
 711         } else
 712                 return -1;
 713         if (plmn_len != 5 && plmn_len != 6)
 714                 return -1;
 715         msin_len = os_strlen(msin);
 716
 717         pos = nai;
 718         end = nai + nai_len;
 719         if (prefix)
 720                 *pos++ = prefix;
 721         os_memcpy(pos, imsi, plmn_len);
 722         pos += plmn_len;
 723         os_memcpy(pos, msin, msin_len);
 724         pos += msin_len;
 725         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 726         if (plmn_len == 5) {
 727                 *pos++ = '0';
 728                 *pos++ = imsi[3];
 729                 *pos++ = imsi[4];
 730         } else {
 731                 *pos++ = imsi[3];
 732                 *pos++ = imsi[4];
 733                 *pos++ = imsi[5];
 734         }
 735         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 736                            imsi[0], imsi[1], imsi[2]);
 737
 738         return 0;
 739 }
 740
 741
 742 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 743 {
 744         char nai[100];
 745         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 746                 return -1;
 747         return wpa_config_set_quoted(ssid, "identity", nai);
 748 }
 749
 750 #endif /* INTERWORKING_3GPP */
 751
 752
 753 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 754                                         struct wpa_ssid *ssid)
 755 {
 756         if (wpa_config_set(ssid, "key_mgmt",
 757                            wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 758                            "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0)
 759                 return -1;
 760         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 761                 return -1;
 762         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 763                 return -1;
 764         return 0;
 765 }
 766
 767
 768 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 769                                      struct wpa_cred *cred,
 770                                      struct wpa_bss *bss)
 771 {
 772 #ifdef INTERWORKING_3GPP
 773         struct wpa_ssid *ssid;
 774         const u8 *ie;
 775         int eap_type;
 776         int res;
 777         char prefix;
 778
 779         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 780                 return -1;
 781
 782         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 783         if (ie == NULL)
 784                 return -1;
 785         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 786                    MAC2STR(bss->bssid));
 787
 788         ssid = wpa_config_add_network(wpa_s->conf);
 789         if (ssid == NULL)
 790                 return -1;
 791         ssid->parent_cred = cred;
 792
 793         wpas_notify_network_added(wpa_s, ssid);
 794         wpa_config_set_network_defaults(ssid);
 795         ssid->priority = cred->priority;
 796         ssid->temporary = 1;
 797         ssid->ssid = os_zalloc(ie[1] + 1);
 798         if (ssid->ssid == NULL)
 799                 goto fail;
 800         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 801         ssid->ssid_len = ie[1];
 802
 803         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 804                 goto fail;
 805
 806         eap_type = EAP_TYPE_SIM;
 807         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 808                 eap_type = EAP_TYPE_AKA;
 809         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
 810                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
 811                     cred->eap_method[0].method == EAP_TYPE_AKA ||
 812                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
 813                         eap_type = cred->eap_method[0].method;
 814         }
 815
 816         switch (eap_type) {
 817         case EAP_TYPE_SIM:
 818                 prefix = '1';
 819                 res = wpa_config_set(ssid, "eap", "SIM", 0);
 820                 break;
 821         case EAP_TYPE_AKA:
 822                 prefix = '0';
 823                 res = wpa_config_set(ssid, "eap", "AKA", 0);
 824                 break;
 825         case EAP_TYPE_AKA_PRIME:
 826                 prefix = '6';
 827                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
 828                 break;
 829         default:
 830                 res = -1;
 831                 break;
 832         }
 833         if (res < 0) {
 834                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
 835                            eap_type);
 836                 goto fail;
 837         }
 838
 839         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
 840                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 841                 goto fail;
 842         }
 843
 844         if (cred->milenage && cred->milenage[0]) {
 845                 if (wpa_config_set_quoted(ssid, "password",
 846                                           cred->milenage) < 0)
 847                         goto fail;
 848         } else if (cred->pcsc) {
 849                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 850                         goto fail;
 851                 if (wpa_s->conf->pcsc_pin &&
 852                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 853                     < 0)
 854                         goto fail;
 855         }
 856
 857         if (cred->password && cred->password[0] &&
 858             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 859                 goto fail;
 860
 861         wpa_config_update_prio_list(wpa_s->conf);
 862         interworking_reconnect(wpa_s);
 863
 864         return 0;
 865
 866 fail:
 867         wpas_notify_network_removed(wpa_s, ssid);
 868         wpa_config_remove_network(wpa_s->conf, ssid->id);
 869 #endif /* INTERWORKING_3GPP */
 870         return -1;
 871 }
 872
 873
 874 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 875                                             size_t rc_len)
 876 {
 877         const u8 *pos, *end;
 878         u8 lens;
 879
 880         if (ie == NULL)
 881                 return 0;
 882
 883         pos = ie + 2;
 884         end = ie + 2 + ie[1];
 885
 886         /* Roaming Consortium element:
 887          * Number of ANQP OIs
 888          * OI #1 and #2 lengths
 889          * OI #1, [OI #2], [OI #3]
 890          */
 891
 892         if (pos + 2 > end)
 893                 return 0;
 894
 895         pos++; /* skip Number of ANQP OIs */
 896         lens = *pos++;
 897         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 898                 return 0;
 899
 900         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 901                 return 1;
 902         pos += lens & 0x0f;
 903
 904         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 905                 return 1;
 906         pos += lens >> 4;
 907
 908         if (pos < end && (size_t) (end - pos) == rc_len &&
 909             os_memcmp(pos, rc_id, rc_len) == 0)
 910                 return 1;
 911
 912         return 0;
 913 }
 914
 915
 916 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 917                                          const u8 *rc_id, size_t rc_len)
 918 {
 919         const u8 *pos, *end;
 920         u8 len;
 921
 922         if (anqp == NULL)
 923                 return 0;
 924
 925         pos = wpabuf_head(anqp);
 926         end = pos + wpabuf_len(anqp);
 927
 928         /* Set of <OI Length, OI> duples */
 929         while (pos < end) {
 930                 len = *pos++;
 931                 if (pos + len > end)
 932                         break;
 933                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 934                         return 1;
 935                 pos += len;
 936         }
 937
 938         return 0;
 939 }
 940
 941
 942 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
 943                                     const u8 *rc_id, size_t rc_len)
 944 {
 945         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
 946                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
 947 }
 948
 949
 950 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
 951 {
 952         const u8 *ie;
 953
 954         if (cred->required_roaming_consortium_len == 0)
 955                 return 0;
 956
 957         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 958
 959         if (ie == NULL &&
 960             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 961                 return 1;
 962
 963         return !roaming_consortium_match(ie,
 964                                          bss->anqp ?
 965                                          bss->anqp->roaming_consortium : NULL,
 966                                          cred->required_roaming_consortium,
 967                                          cred->required_roaming_consortium_len);
 968 }
 969
 970
 971 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
 972 {
 973         size_t i;
 974
 975         if (!cred->excluded_ssid)
 976                 return 0;
 977
 978         for (i = 0; i < cred->num_excluded_ssid; i++) {
 979                 struct excluded_ssid *e = &cred->excluded_ssid[i];
 980                 if (bss->ssid_len == e->ssid_len &&
 981                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
 982                         return 1;
 983         }
 984
 985         return 0;
 986 }
 987
 988
 989 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 990         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 991 {
 992         struct wpa_cred *cred, *selected = NULL;
 993         const u8 *ie;
 994
 995         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 996
 997         if (ie == NULL &&
 998             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 999                 return NULL;
1000
1001         if (wpa_s->conf->cred == NULL)
1002                 return NULL;
1003
1004         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1005                 if (cred->roaming_consortium_len == 0)
1006                         continue;
1007
1008                 if (!roaming_consortium_match(ie,
1009                                               bss->anqp ?
1010                                               bss->anqp->roaming_consortium :
1011                                               NULL,
1012                                               cred->roaming_consortium,
1013                                               cred->roaming_consortium_len))
1014                         continue;
1015
1016                 if (cred_excluded_ssid(cred, bss))
1017                         continue;
1018                 if (cred_no_required_oi_match(cred, bss))
1019                         continue;
1020
1021                 if (selected == NULL ||
1022                     selected->priority < cred->priority)
1023                         selected = cred;
1024         }
1025
1026         return selected;
1027 }
1028
1029
1030 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1031                                        struct wpa_cred *cred, int ttls)
1032 {
1033         if (cred->eap_method) {
1034                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1035                         cred->eap_method->method == EAP_TYPE_TTLS;
1036
1037                 os_free(ssid->eap.eap_methods);
1038                 ssid->eap.eap_methods =
1039                         os_malloc(sizeof(struct eap_method_type) * 2);
1040                 if (ssid->eap.eap_methods == NULL)
1041                         return -1;
1042                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1043                           sizeof(*cred->eap_method));
1044                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1045                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1046         }
1047
1048         if (ttls && cred->username && cred->username[0]) {
1049                 const char *pos;
1050                 char *anon;
1051                 /* Use anonymous NAI in Phase 1 */
1052                 pos = os_strchr(cred->username, '@');
1053                 if (pos) {
1054                         size_t buflen = 9 + os_strlen(pos) + 1;
1055                         anon = os_malloc(buflen);
1056                         if (anon == NULL)
1057                                 return -1;
1058                         os_snprintf(anon, buflen, "anonymous%s", pos);
1059                 } else if (cred->realm) {
1060                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1061                         anon = os_malloc(buflen);
1062                         if (anon == NULL)
1063                                 return -1;
1064                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1065                 } else {
1066                         anon = os_strdup("anonymous");
1067                         if (anon == NULL)
1068                                 return -1;
1069                 }
1070                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1071                     0) {
1072                         os_free(anon);
1073                         return -1;
1074                 }
1075                 os_free(anon);
1076         }
1077
1078         if (cred->username && cred->username[0] &&
1079             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1080                 return -1;
1081
1082         if (cred->password && cred->password[0]) {
1083                 if (cred->ext_password &&
1084                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1085                         return -1;
1086                 if (!cred->ext_password &&
1087                     wpa_config_set_quoted(ssid, "password", cred->password) <
1088                     0)
1089                         return -1;
1090         }
1091
1092         if (cred->client_cert && cred->client_cert[0] &&
1093             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1094                 return -1;
1095
1096 #ifdef ANDROID
1097         if (cred->private_key &&
1098             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1099                 /* Use OpenSSL engine configuration for Android keystore */
1100                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1101                     wpa_config_set_quoted(ssid, "key_id",
1102                                           cred->private_key + 11) < 0 ||
1103                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1104                         return -1;
1105         } else
1106 #endif /* ANDROID */
1107         if (cred->private_key && cred->private_key[0] &&
1108             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1109                 return -1;
1110
1111         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1112             wpa_config_set_quoted(ssid, "private_key_passwd",
1113                                   cred->private_key_passwd) < 0)
1114                 return -1;
1115
1116         if (cred->phase1) {
1117                 os_free(ssid->eap.phase1);
1118                 ssid->eap.phase1 = os_strdup(cred->phase1);
1119         }
1120         if (cred->phase2) {
1121                 os_free(ssid->eap.phase2);
1122                 ssid->eap.phase2 = os_strdup(cred->phase2);
1123         }
1124
1125         if (cred->ca_cert && cred->ca_cert[0] &&
1126             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1127                 return -1;
1128
1129         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1130             wpa_config_set_quoted(ssid, "domain_suffix_match",
1131                                   cred->domain_suffix_match) < 0)
1132                 return -1;
1133
1134         return 0;
1135 }
1136
1137
1138 static int interworking_connect_roaming_consortium(
1139         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1140         struct wpa_bss *bss, const u8 *ssid_ie)
1141 {
1142         struct wpa_ssid *ssid;
1143
1144         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1145                    "roaming consortium match", MAC2STR(bss->bssid));
1146
1147         ssid = wpa_config_add_network(wpa_s->conf);
1148         if (ssid == NULL)
1149                 return -1;
1150         ssid->parent_cred = cred;
1151         wpas_notify_network_added(wpa_s, ssid);
1152         wpa_config_set_network_defaults(ssid);
1153         ssid->priority = cred->priority;
1154         ssid->temporary = 1;
1155         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1156         if (ssid->ssid == NULL)
1157                 goto fail;
1158         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1159         ssid->ssid_len = ssid_ie[1];
1160
1161         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1162                 goto fail;
1163
1164         if (cred->eap_method == NULL) {
1165                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1166                            "credential using roaming consortium");
1167                 goto fail;
1168         }
1169
1170         if (interworking_set_eap_params(
1171                     ssid, cred,
1172                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1173                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1174                 goto fail;
1175
1176         wpa_config_update_prio_list(wpa_s->conf);
1177         interworking_reconnect(wpa_s);
1178
1179         return 0;
1180
1181 fail:
1182         wpas_notify_network_removed(wpa_s, ssid);
1183         wpa_config_remove_network(wpa_s->conf, ssid->id);
1184         return -1;
1185 }
1186
1187
1188 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1189 {
1190         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1191         struct wpa_ssid *ssid;
1192         struct nai_realm *realm;
1193         struct nai_realm_eap *eap = NULL;
1194         u16 count, i;
1195         char buf[100];
1196         const u8 *ie;
1197
1198         if (wpa_s->conf->cred == NULL || bss == NULL)
1199                 return -1;
1200         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1201         if (ie == NULL || ie[1] == 0) {
1202                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1203                            MACSTR, MAC2STR(bss->bssid));
1204                 return -1;
1205         }
1206
1207         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1208                 /*
1209                  * We currently support only HS 2.0 networks and those are
1210                  * required to use WPA2-Enterprise.
1211                  */
1212                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1213                            "RSN");
1214                 return -1;
1215         }
1216
1217         cred_rc = interworking_credentials_available_roaming_consortium(wpa_s,
1218                                                                         bss);
1219         if (cred_rc) {
1220                 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1221                            "consortium matching credential priority %d",
1222                            cred_rc->priority);
1223         }
1224
1225         cred = interworking_credentials_available_realm(wpa_s, bss);
1226         if (cred) {
1227                 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
1228                            "matching credential priority %d",
1229                            cred->priority);
1230         }
1231
1232         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss);
1233         if (cred_3gpp) {
1234                 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
1235                            "credential priority %d", cred_3gpp->priority);
1236         }
1237
1238         if (cred_rc &&
1239             (cred == NULL || cred_rc->priority >= cred->priority) &&
1240             (cred_3gpp == NULL || cred_rc->priority >= cred_3gpp->priority))
1241                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1242                                                                bss, ie);
1243
1244         if (cred_3gpp &&
1245             (cred == NULL || cred_3gpp->priority >= cred->priority)) {
1246                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
1247         }
1248
1249         if (cred == NULL) {
1250                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1251                            "found for " MACSTR, MAC2STR(bss->bssid));
1252                 return -1;
1253         }
1254
1255         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1256                                 &count);
1257         if (realm == NULL) {
1258                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1259                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1260                 return -1;
1261         }
1262
1263         for (i = 0; i < count; i++) {
1264                 if (!nai_realm_match(&realm[i], cred->realm))
1265                         continue;
1266                 eap = nai_realm_find_eap(cred, &realm[i]);
1267                 if (eap)
1268                         break;
1269         }
1270
1271         if (!eap) {
1272                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1273                            "and EAP method found for " MACSTR,
1274                            MAC2STR(bss->bssid));
1275                 nai_realm_free(realm, count);
1276                 return -1;
1277         }
1278
1279         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1280                    MAC2STR(bss->bssid));
1281
1282         ssid = wpa_config_add_network(wpa_s->conf);
1283         if (ssid == NULL) {
1284                 nai_realm_free(realm, count);
1285                 return -1;
1286         }
1287         ssid->parent_cred = cred;
1288         wpas_notify_network_added(wpa_s, ssid);
1289         wpa_config_set_network_defaults(ssid);
1290         ssid->priority = cred->priority;
1291         ssid->temporary = 1;
1292         ssid->ssid = os_zalloc(ie[1] + 1);
1293         if (ssid->ssid == NULL)
1294                 goto fail;
1295         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1296         ssid->ssid_len = ie[1];
1297
1298         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1299                 goto fail;
1300
1301         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1302                                                      eap->method), 0) < 0)
1303                 goto fail;
1304
1305         switch (eap->method) {
1306         case EAP_TYPE_TTLS:
1307                 if (eap->inner_method) {
1308                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1309                                     eap_get_name(EAP_VENDOR_IETF,
1310                                                  eap->inner_method));
1311                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1312                                 goto fail;
1313                         break;
1314                 }
1315                 switch (eap->inner_non_eap) {
1316                 case NAI_REALM_INNER_NON_EAP_PAP:
1317                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1318                             0)
1319                                 goto fail;
1320                         break;
1321                 case NAI_REALM_INNER_NON_EAP_CHAP:
1322                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1323                             < 0)
1324                                 goto fail;
1325                         break;
1326                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1327                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1328                                            0) < 0)
1329                                 goto fail;
1330                         break;
1331                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1332                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1333                                            0) < 0)
1334                                 goto fail;
1335                         break;
1336                 default:
1337                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1338                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1339                                            0) < 0)
1340                                 goto fail;
1341                         break;
1342                 }
1343                 break;
1344         case EAP_TYPE_PEAP:
1345                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1346                             eap_get_name(EAP_VENDOR_IETF,
1347                                          eap->inner_method ?
1348                                          eap->inner_method :
1349                                          EAP_TYPE_MSCHAPV2));
1350                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1351                         goto fail;
1352                 break;
1353         case EAP_TYPE_TLS:
1354                 break;
1355         }
1356
1357         if (interworking_set_eap_params(ssid, cred,
1358                                         eap->method == EAP_TYPE_TTLS) < 0)
1359                 goto fail;
1360
1361         nai_realm_free(realm, count);
1362
1363         wpa_config_update_prio_list(wpa_s->conf);
1364         interworking_reconnect(wpa_s);
1365
1366         return 0;
1367
1368 fail:
1369         wpas_notify_network_removed(wpa_s, ssid);
1370         wpa_config_remove_network(wpa_s->conf, ssid->id);
1371         nai_realm_free(realm, count);
1372         return -1;
1373 }
1374
1375
1376 static struct wpa_cred * interworking_credentials_available_3gpp(
1377         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1378 {
1379         struct wpa_cred *selected = NULL;
1380 #ifdef INTERWORKING_3GPP
1381         struct wpa_cred *cred;
1382         int ret;
1383
1384         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1385                 return NULL;
1386
1387 #ifdef CONFIG_EAP_PROXY
1388         if (!wpa_s->imsi[0]) {
1389                 size_t len;
1390                 wpa_printf(MSG_DEBUG, "Interworking: IMSI not available - try to read again through eap_proxy");
1391                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1392                                                              wpa_s->imsi,
1393                                                              &len);
1394                 if (wpa_s->mnc_len > 0) {
1395                         wpa_s->imsi[len] = '\0';
1396                         wpa_printf(MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)",
1397                                    wpa_s->imsi, wpa_s->mnc_len);
1398                 } else {
1399                         wpa_printf(MSG_DEBUG, "eap_proxy: IMSI not available");
1400                 }
1401         }
1402 #endif /* CONFIG_EAP_PROXY */
1403
1404         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1405                 char *sep;
1406                 const char *imsi;
1407                 int mnc_len;
1408                 char imsi_buf[16];
1409                 size_t msin_len;
1410
1411 #ifdef PCSC_FUNCS
1412                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1413                     wpa_s->imsi[0]) {
1414                         imsi = wpa_s->imsi;
1415                         mnc_len = wpa_s->mnc_len;
1416                         goto compare;
1417                 }
1418 #endif /* PCSC_FUNCS */
1419 #ifdef CONFIG_EAP_PROXY
1420                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1421                         imsi = wpa_s->imsi;
1422                         mnc_len = wpa_s->mnc_len;
1423                         goto compare;
1424                 }
1425 #endif /* CONFIG_EAP_PROXY */
1426
1427                 if (cred->imsi == NULL || !cred->imsi[0] ||
1428                     (!wpa_s->conf->external_sim &&
1429                      (cred->milenage == NULL || !cred->milenage[0])))
1430                         continue;
1431
1432                 sep = os_strchr(cred->imsi, '-');
1433                 if (sep == NULL ||
1434                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1435                         continue;
1436                 mnc_len = sep - cred->imsi - 3;
1437                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1438                 sep++;
1439                 msin_len = os_strlen(cred->imsi);
1440                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1441                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1442                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1443                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1444                 imsi = imsi_buf;
1445
1446 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1447         compare:
1448 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1449                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1450                            MACSTR, MAC2STR(bss->bssid));
1451                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1452                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1453                 if (ret) {
1454                         if (cred_excluded_ssid(cred, bss))
1455                                 continue;
1456                         if (cred_no_required_oi_match(cred, bss))
1457                                 continue;
1458                         if (selected == NULL ||
1459                             selected->priority < cred->priority)
1460                                 selected = cred;
1461                 }
1462         }
1463 #endif /* INTERWORKING_3GPP */
1464         return selected;
1465 }
1466
1467
1468 static struct wpa_cred * interworking_credentials_available_realm(
1469         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1470 {
1471         struct wpa_cred *cred, *selected = NULL;
1472         struct nai_realm *realm;
1473         u16 count, i;
1474
1475         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1476                 return NULL;
1477
1478         if (wpa_s->conf->cred == NULL)
1479                 return NULL;
1480
1481         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1482                    MACSTR, MAC2STR(bss->bssid));
1483         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1484         if (realm == NULL) {
1485                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1486                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1487                 return NULL;
1488         }
1489
1490         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1491                 if (cred->realm == NULL)
1492                         continue;
1493
1494                 for (i = 0; i < count; i++) {
1495                         if (!nai_realm_match(&realm[i], cred->realm))
1496                                 continue;
1497                         if (nai_realm_find_eap(cred, &realm[i])) {
1498                                 if (cred_excluded_ssid(cred, bss))
1499                                         continue;
1500                                 if (cred_no_required_oi_match(cred, bss))
1501                                         continue;
1502                                 if (selected == NULL ||
1503                                     selected->priority < cred->priority)
1504                                         selected = cred;
1505                                 break;
1506                         }
1507                 }
1508         }
1509
1510         nai_realm_free(realm, count);
1511
1512         return selected;
1513 }
1514
1515
1516 static struct wpa_cred * interworking_credentials_available(
1517         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1518 {
1519         struct wpa_cred *cred, *cred2;
1520
1521         cred = interworking_credentials_available_realm(wpa_s, bss);
1522         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1523         if (cred && cred2 && cred2->priority >= cred->priority)
1524                 cred = cred2;
1525         if (!cred)
1526                 cred = cred2;
1527
1528         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1529                                                                       bss);
1530         if (cred && cred2 && cred2->priority >= cred->priority)
1531                 cred = cred2;
1532         if (!cred)
1533                 cred = cred2;
1534
1535         return cred;
1536 }
1537
1538
1539 static int domain_name_list_contains(struct wpabuf *domain_names,
1540                                      const char *domain)
1541 {
1542         const u8 *pos, *end;
1543         size_t len;
1544
1545         len = os_strlen(domain);
1546         pos = wpabuf_head(domain_names);
1547         end = pos + wpabuf_len(domain_names);
1548
1549         while (pos + 1 < end) {
1550                 if (pos + 1 + pos[0] > end)
1551                         break;
1552
1553                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1554                                   pos + 1, pos[0]);
1555                 if (pos[0] == len &&
1556                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1557                         return 1;
1558
1559                 pos += 1 + pos[0];
1560         }
1561
1562         return 0;
1563 }
1564
1565
1566 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
1567                               struct wpa_cred *cred,
1568                               struct wpabuf *domain_names)
1569 {
1570         size_t i;
1571         int ret = -1;
1572 #ifdef INTERWORKING_3GPP
1573         char nai[100], *realm;
1574
1575         char *imsi = NULL;
1576         int mnc_len = 0;
1577         if (cred->imsi)
1578                 imsi = cred->imsi;
1579 #ifdef CONFIG_PCSC
1580         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1581                  wpa_s->scard && wpa_s->imsi[0]) {
1582                 imsi = wpa_s->imsi;
1583                 mnc_len = wpa_s->mnc_len;
1584         }
1585 #endif /* CONFIG_PCSC */
1586 #ifdef CONFIG_EAP_PROXY
1587         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1588                 imsi = wpa_s->imsi;
1589                 mnc_len = wpa_s->mnc_len;
1590         }
1591 #endif /* CONFIG_EAP_PROXY */
1592         if (domain_names &&
1593             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
1594                 realm = os_strchr(nai, '@');
1595                 if (realm)
1596                         realm++;
1597                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1598                            "with SIM/USIM domain %s", realm);
1599                 if (realm &&
1600                     domain_name_list_contains(domain_names, realm))
1601                         return 1;
1602                 if (realm)
1603                         ret = 0;
1604         }
1605 #endif /* INTERWORKING_3GPP */
1606
1607         if (domain_names == NULL || cred->domain == NULL)
1608                 return ret;
1609
1610         for (i = 0; i < cred->num_domain; i++) {
1611                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1612                            "home SP FQDN %s", cred->domain[i]);
1613                 if (domain_name_list_contains(domain_names, cred->domain[i]))
1614                         return 1;
1615         }
1616
1617         return 0;
1618 }
1619
1620
1621 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1622                                 struct wpabuf *domain_names)
1623 {
1624         struct wpa_cred *cred;
1625
1626         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1627                 return -1;
1628
1629         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1630                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
1631                 if (res)
1632                         return res;
1633         }
1634
1635         return 0;
1636 }
1637
1638
1639 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1640 {
1641         struct wpa_bss *bss;
1642         struct wpa_ssid *ssid;
1643
1644         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1645                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1646                         if (wpas_network_disabled(wpa_s, ssid) ||
1647                             ssid->mode != WPAS_MODE_INFRA)
1648                                 continue;
1649                         if (ssid->ssid_len != bss->ssid_len ||
1650                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1651                             0)
1652                                 continue;
1653                         /*
1654                          * TODO: Consider more accurate matching of security
1655                          * configuration similarly to what is done in events.c
1656                          */
1657                         return 1;
1658                 }
1659         }
1660
1661         return 0;
1662 }
1663
1664
1665 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1666 {
1667         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1668         int selected_prio = -999999, selected_home_prio = -999999;
1669         unsigned int count = 0;
1670         const char *type;
1671         int res;
1672         struct wpa_cred *cred;
1673
1674         wpa_s->network_select = 0;
1675
1676         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1677                 cred = interworking_credentials_available(wpa_s, bss);
1678                 if (!cred)
1679                         continue;
1680                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1681                         /*
1682                          * We currently support only HS 2.0 networks and those
1683                          * are required to use WPA2-Enterprise.
1684                          */
1685                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1686                                    "with " MACSTR " but network does not use "
1687                                    "RSN", MAC2STR(bss->bssid));
1688                         continue;
1689                 }
1690                 count++;
1691                 res = interworking_home_sp(wpa_s, bss->anqp ?
1692                                            bss->anqp->domain_name : NULL);
1693                 if (res > 0)
1694                         type = "home";
1695                 else if (res == 0)
1696                         type = "roaming";
1697                 else
1698                         type = "unknown";
1699                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1700                         MAC2STR(bss->bssid), type);
1701                 if (wpa_s->auto_select ||
1702                     (wpa_s->conf->auto_interworking &&
1703                      wpa_s->auto_network_select)) {
1704                         if (selected == NULL ||
1705                             cred->priority > selected_prio) {
1706                                 selected = bss;
1707                                 selected_prio = cred->priority;
1708                         }
1709                         if (res > 0 &&
1710                             (selected_home == NULL ||
1711                              cred->priority > selected_home_prio)) {
1712                                 selected_home = bss;
1713                                 selected_home_prio = cred->priority;
1714                         }
1715                 }
1716         }
1717
1718         if (selected_home && selected_home != selected &&
1719             selected_home_prio >= selected_prio) {
1720                 /* Prefer network operated by the Home SP */
1721                 selected = selected_home;
1722         }
1723
1724         if (count == 0) {
1725                 /*
1726                  * No matching network was found based on configured
1727                  * credentials. Check whether any of the enabled network blocks
1728                  * have matching APs.
1729                  */
1730                 if (interworking_find_network_match(wpa_s)) {
1731                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1732                                    "match for enabled network configurations");
1733                         if (wpa_s->auto_select)
1734                                 interworking_reconnect(wpa_s);
1735                         return;
1736                 }
1737
1738                 if (wpa_s->auto_network_select) {
1739                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1740                                    "scanning after ANQP fetch");
1741                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1742                                                 0);
1743                         return;
1744                 }
1745
1746                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1747                         "with matching credentials found");
1748         }
1749
1750         if (selected)
1751                 interworking_connect(wpa_s, selected);
1752 }
1753
1754
1755 static struct wpa_bss_anqp *
1756 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1757 {
1758         struct wpa_bss *other;
1759
1760         if (is_zero_ether_addr(bss->hessid))
1761                 return NULL; /* Cannot be in the same homegenous ESS */
1762
1763         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1764                 if (other == bss)
1765                         continue;
1766                 if (other->anqp == NULL)
1767                         continue;
1768                 if (other->anqp->roaming_consortium == NULL &&
1769                     other->anqp->nai_realm == NULL &&
1770                     other->anqp->anqp_3gpp == NULL &&
1771                     other->anqp->domain_name == NULL)
1772                         continue;
1773                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1774                         continue;
1775                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1776                         continue;
1777                 if (bss->ssid_len != other->ssid_len ||
1778                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1779                         continue;
1780
1781                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1782                            "already fetched BSSID " MACSTR " and " MACSTR,
1783                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1784                 other->anqp->users++;
1785                 return other->anqp;
1786         }
1787
1788         return NULL;
1789 }
1790
1791
1792 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1793 {
1794         struct wpa_bss *bss;
1795         int found = 0;
1796         const u8 *ie;
1797
1798         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress)
1799                 return;
1800
1801         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1802                 if (!(bss->caps & IEEE80211_CAP_ESS))
1803                         continue;
1804                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1805                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1806                         continue; /* AP does not support Interworking */
1807
1808                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1809                         if (bss->anqp == NULL) {
1810                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1811                                                                          bss);
1812                                 if (bss->anqp) {
1813                                         /* Shared data already fetched */
1814                                         continue;
1815                                 }
1816                                 bss->anqp = wpa_bss_anqp_alloc();
1817                                 if (bss->anqp == NULL)
1818                                         break;
1819                         }
1820                         found++;
1821                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1822                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1823                                 MACSTR, MAC2STR(bss->bssid));
1824                         interworking_anqp_send_req(wpa_s, bss);
1825                         break;
1826                 }
1827         }
1828
1829         if (found == 0) {
1830                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1831                 wpa_s->fetch_anqp_in_progress = 0;
1832                 if (wpa_s->network_select)
1833                         interworking_select_network(wpa_s);
1834         }
1835 }
1836
1837
1838 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1839 {
1840         struct wpa_bss *bss;
1841
1842         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1843                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1844
1845         wpa_s->fetch_anqp_in_progress = 1;
1846         interworking_next_anqp_fetch(wpa_s);
1847 }
1848
1849
1850 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1851 {
1852         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1853                 return 0;
1854
1855         wpa_s->network_select = 0;
1856         wpa_s->fetch_all_anqp = 1;
1857
1858         interworking_start_fetch_anqp(wpa_s);
1859
1860         return 0;
1861 }
1862
1863
1864 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1865 {
1866         if (!wpa_s->fetch_anqp_in_progress)
1867                 return;
1868
1869         wpa_s->fetch_anqp_in_progress = 0;
1870 }
1871
1872
1873 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1874                   u16 info_ids[], size_t num_ids)
1875 {
1876         struct wpabuf *buf;
1877         int ret = 0;
1878         int freq;
1879         struct wpa_bss *bss;
1880         int res;
1881
1882         freq = wpa_s->assoc_freq;
1883         bss = wpa_bss_get_bssid(wpa_s, dst);
1884         if (bss) {
1885                 wpa_bss_anqp_unshare_alloc(bss);
1886                 freq = bss->freq;
1887         }
1888         if (freq <= 0)
1889                 return -1;
1890
1891         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1892                    MAC2STR(dst), (unsigned int) num_ids);
1893
1894         buf = anqp_build_req(info_ids, num_ids, NULL);
1895         if (buf == NULL)
1896                 return -1;
1897
1898         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1899         if (res < 0) {
1900                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1901                 wpabuf_free(buf);
1902                 ret = -1;
1903         } else
1904                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1905                            "%u", res);
1906
1907         return ret;
1908 }
1909
1910
1911 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1912                                             struct wpa_bss *bss, const u8 *sa,
1913                                             u16 info_id,
1914                                             const u8 *data, size_t slen)
1915 {
1916         const u8 *pos = data;
1917         struct wpa_bss_anqp *anqp = NULL;
1918 #ifdef CONFIG_HS20
1919         u8 type;
1920 #endif /* CONFIG_HS20 */
1921
1922         if (bss)
1923                 anqp = bss->anqp;
1924
1925         switch (info_id) {
1926         case ANQP_CAPABILITY_LIST:
1927                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1928                         " ANQP Capability list", MAC2STR(sa));
1929                 break;
1930         case ANQP_VENUE_NAME:
1931                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1932                         " Venue Name", MAC2STR(sa));
1933                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1934                 if (anqp) {
1935                         wpabuf_free(anqp->venue_name);
1936                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1937                 }
1938                 break;
1939         case ANQP_NETWORK_AUTH_TYPE:
1940                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1941                         " Network Authentication Type information",
1942                         MAC2STR(sa));
1943                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1944                                   "Type", pos, slen);
1945                 if (anqp) {
1946                         wpabuf_free(anqp->network_auth_type);
1947                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1948                 }
1949                 break;
1950         case ANQP_ROAMING_CONSORTIUM:
1951                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1952                         " Roaming Consortium list", MAC2STR(sa));
1953                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1954                                   pos, slen);
1955                 if (anqp) {
1956                         wpabuf_free(anqp->roaming_consortium);
1957                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1958                 }
1959                 break;
1960         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1961                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1962                         " IP Address Type Availability information",
1963                         MAC2STR(sa));
1964                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1965                             pos, slen);
1966                 if (anqp) {
1967                         wpabuf_free(anqp->ip_addr_type_availability);
1968                         anqp->ip_addr_type_availability =
1969                                 wpabuf_alloc_copy(pos, slen);
1970                 }
1971                 break;
1972         case ANQP_NAI_REALM:
1973                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1974                         " NAI Realm list", MAC2STR(sa));
1975                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1976                 if (anqp) {
1977                         wpabuf_free(anqp->nai_realm);
1978                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1979                 }
1980                 break;
1981         case ANQP_3GPP_CELLULAR_NETWORK:
1982                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1983                         " 3GPP Cellular Network information", MAC2STR(sa));
1984                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1985                                   pos, slen);
1986                 if (anqp) {
1987                         wpabuf_free(anqp->anqp_3gpp);
1988                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1989                 }
1990                 break;
1991         case ANQP_DOMAIN_NAME:
1992                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1993                         " Domain Name list", MAC2STR(sa));
1994                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1995                 if (anqp) {
1996                         wpabuf_free(anqp->domain_name);
1997                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1998                 }
1999                 break;
2000         case ANQP_VENDOR_SPECIFIC:
2001                 if (slen < 3)
2002                         return;
2003
2004                 switch (WPA_GET_BE24(pos)) {
2005 #ifdef CONFIG_HS20
2006                 case OUI_WFA:
2007                         pos += 3;
2008                         slen -= 3;
2009
2010                         if (slen < 1)
2011                                 return;
2012                         type = *pos++;
2013                         slen--;
2014
2015                         switch (type) {
2016                         case HS20_ANQP_OUI_TYPE:
2017                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
2018                                                              slen);
2019                                 break;
2020                         default:
2021                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
2022                                            "vendor type %u", type);
2023                                 break;
2024                         }
2025                         break;
2026 #endif /* CONFIG_HS20 */
2027                 default:
2028                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
2029                                    "vendor-specific ANQP OUI %06x",
2030                                    WPA_GET_BE24(pos));
2031                         return;
2032                 }
2033                 break;
2034         default:
2035                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
2036                            "%u", info_id);
2037                 break;
2038         }
2039 }
2040
2041
2042 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2043                   enum gas_query_result result,
2044                   const struct wpabuf *adv_proto,
2045                   const struct wpabuf *resp, u16 status_code)
2046 {
2047         struct wpa_supplicant *wpa_s = ctx;
2048         const u8 *pos;
2049         const u8 *end;
2050         u16 info_id;
2051         u16 slen;
2052         struct wpa_bss *bss = NULL, *tmp;
2053
2054         if (result != GAS_QUERY_SUCCESS)
2055                 return;
2056
2057         pos = wpabuf_head(adv_proto);
2058         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2059             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2060                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
2061                            "Protocol in response");
2062                 return;
2063         }
2064
2065         /*
2066          * If possible, select the BSS entry based on which BSS entry was used
2067          * for the request. This can help in cases where multiple BSS entries
2068          * may exist for the same AP.
2069          */
2070         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2071                 if (tmp == wpa_s->interworking_gas_bss &&
2072                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2073                         bss = tmp;
2074                         break;
2075                 }
2076         }
2077         if (bss == NULL)
2078                 bss = wpa_bss_get_bssid(wpa_s, dst);
2079
2080         pos = wpabuf_head(resp);
2081         end = pos + wpabuf_len(resp);
2082
2083         while (pos < end) {
2084                 if (pos + 4 > end) {
2085                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
2086                         break;
2087                 }
2088                 info_id = WPA_GET_LE16(pos);
2089                 pos += 2;
2090                 slen = WPA_GET_LE16(pos);
2091                 pos += 2;
2092                 if (pos + slen > end) {
2093                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
2094                                    "for Info ID %u", info_id);
2095                         break;
2096                 }
2097                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2098                                                 slen);
2099                 pos += slen;
2100         }
2101 }
2102
2103
2104 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2105                                           struct wpa_scan_results *scan_res)
2106 {
2107         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2108                    "ANQP fetch");
2109         interworking_start_fetch_anqp(wpa_s);
2110 }
2111
2112
2113 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
2114 {
2115         interworking_stop_fetch_anqp(wpa_s);
2116         wpa_s->network_select = 1;
2117         wpa_s->auto_network_select = 0;
2118         wpa_s->auto_select = !!auto_select;
2119         wpa_s->fetch_all_anqp = 0;
2120         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2121                    "selection");
2122         wpa_s->scan_res_handler = interworking_scan_res_handler;
2123         wpa_s->normal_scans = 0;
2124         wpa_s->scan_req = MANUAL_SCAN_REQ;
2125         wpa_s->after_wps = 0;
2126         wpa_s->known_wps_freq = 0;
2127         wpa_supplicant_req_scan(wpa_s, 0, 0);
2128
2129         return 0;
2130 }
2131
2132
2133 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2134                         enum gas_query_result result,
2135                         const struct wpabuf *adv_proto,
2136                         const struct wpabuf *resp, u16 status_code)
2137 {
2138         struct wpa_supplicant *wpa_s = ctx;
2139
2140         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2141                 " dialog_token=%d status_code=%d resp_len=%d",
2142                 MAC2STR(addr), dialog_token, status_code,
2143                 resp ? (int) wpabuf_len(resp) : -1);
2144         if (!resp)
2145                 return;
2146
2147         wpabuf_free(wpa_s->last_gas_resp);
2148         wpa_s->last_gas_resp = wpabuf_dup(resp);
2149         if (wpa_s->last_gas_resp == NULL)
2150                 return;
2151         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2152         wpa_s->last_gas_dialog_token = dialog_token;
2153 }
2154
2155
2156 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2157                      const struct wpabuf *adv_proto,
2158                      const struct wpabuf *query)
2159 {
2160         struct wpabuf *buf;
2161         int ret = 0;
2162         int freq;
2163         struct wpa_bss *bss;
2164         int res;
2165         size_t len;
2166         u8 query_resp_len_limit = 0, pame_bi = 0;
2167
2168         freq = wpa_s->assoc_freq;
2169         bss = wpa_bss_get_bssid(wpa_s, dst);
2170         if (bss)
2171                 freq = bss->freq;
2172         if (freq <= 0)
2173                 return -1;
2174
2175         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2176                    MAC2STR(dst), freq);
2177         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2178         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2179
2180         len = 3 + wpabuf_len(adv_proto) + 2;
2181         if (query)
2182                 len += wpabuf_len(query);
2183         buf = gas_build_initial_req(0, len);
2184         if (buf == NULL)
2185                 return -1;
2186
2187         /* Advertisement Protocol IE */
2188         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2189         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2190         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2191                       (pame_bi ? 0x80 : 0));
2192         wpabuf_put_buf(buf, adv_proto);
2193
2194         /* GAS Query */
2195         if (query) {
2196                 wpabuf_put_le16(buf, wpabuf_len(query));
2197                 wpabuf_put_buf(buf, query);
2198         } else
2199                 wpabuf_put_le16(buf, 0);
2200
2201         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2202         if (res < 0) {
2203                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2204                 wpabuf_free(buf);
2205                 ret = -1;
2206         } else
2207                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2208                            "%u", res);
2209
2210         return ret;
2211 }