contrib/wpa_supplicant/wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
   4  * Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
   5  *
   6  * This software may be distributed under the terms of the BSD license.
   7  * See README for more details.
   8  */
   9
  10 #include "includes.h"
  11
  12 #include "common.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/gas.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "utils/pcsc_funcs.h"
  17 #include "utils/eloop.h"
  18 #include "drivers/driver.h"
  19 #include "eap_common/eap_defs.h"
  20 #include "eap_peer/eap.h"
  21 #include "eap_peer/eap_methods.h"
  22 #include "eapol_supp/eapol_supp_sm.h"
  23 #include "rsn_supp/wpa.h"
  24 #include "wpa_supplicant_i.h"
  25 #include "config.h"
  26 #include "config_ssid.h"
  27 #include "bss.h"
  28 #include "scan.h"
  29 #include "notify.h"
  30 #include "gas_query.h"
  31 #include "hs20_supplicant.h"
  32 #include "interworking.h"
  33
  34
  35 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  36 #define INTERWORKING_3GPP
  37 #else
  38 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  39 #define INTERWORKING_3GPP
  40 #else
  41 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  42 #define INTERWORKING_3GPP
  43 #endif
  44 #endif
  45 #endif
  46
  47 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  48 static struct wpa_cred * interworking_credentials_available_realm(
  49         struct wpa_supplicant *wpa_s, struct wpa_bss *bss);
  50 static struct wpa_cred * interworking_credentials_available_3gpp(
  51         struct wpa_supplicant *wpa_s, struct wpa_bss *bss);
  52
  53
  54 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  55 {
  56         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  57                 wpa_supplicant_cancel_sched_scan(wpa_s);
  58                 wpa_supplicant_deauthenticate(wpa_s,
  59                                               WLAN_REASON_DEAUTH_LEAVING);
  60         }
  61         wpa_s->disconnected = 0;
  62         wpa_s->reassociate = 1;
  63
  64         if (wpa_supplicant_fast_associate(wpa_s) >= 0)
  65                 return;
  66
  67         wpa_supplicant_req_scan(wpa_s, 0, 0);
  68 }
  69
  70
  71 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  72                                       struct wpabuf *extra)
  73 {
  74         struct wpabuf *buf;
  75         size_t i;
  76         u8 *len_pos;
  77
  78         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  79                                          (extra ? wpabuf_len(extra) : 0));
  80         if (buf == NULL)
  81                 return NULL;
  82
  83         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  84         for (i = 0; i < num_ids; i++)
  85                 wpabuf_put_le16(buf, info_ids[i]);
  86         gas_anqp_set_element_len(buf, len_pos);
  87         if (extra)
  88                 wpabuf_put_buf(buf, extra);
  89
  90         gas_anqp_set_len(buf);
  91
  92         return buf;
  93 }
  94
  95
  96 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  97                                       u8 dialog_token,
  98                                       enum gas_query_result result,
  99                                       const struct wpabuf *adv_proto,
 100                                       const struct wpabuf *resp,
 101                                       u16 status_code)
 102 {
 103         struct wpa_supplicant *wpa_s = ctx;
 104
 105         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 106                      status_code);
 107         interworking_next_anqp_fetch(wpa_s);
 108 }
 109
 110
 111 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 112 {
 113         struct wpa_cred *cred;
 114
 115         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 116                 if (cred->roaming_consortium_len)
 117                         return 1;
 118                 if (cred->required_roaming_consortium_len)
 119                         return 1;
 120         }
 121         return 0;
 122 }
 123
 124
 125 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 126 {
 127         struct wpa_cred *cred;
 128
 129         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 130                 if (cred->pcsc || cred->imsi)
 131                         return 1;
 132         }
 133         return 0;
 134 }
 135
 136
 137 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 138 {
 139         struct wpa_cred *cred;
 140
 141         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 142                 if (cred->pcsc || cred->imsi)
 143                         continue;
 144                 if (!cred->eap_method)
 145                         return 1;
 146                 if (cred->realm && cred->roaming_consortium_len == 0)
 147                         return 1;
 148         }
 149         return 0;
 150 }
 151
 152
 153 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 154 {
 155         struct wpa_cred *cred;
 156
 157         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 158                 if (cred->domain || cred->pcsc || cred->imsi)
 159                         return 1;
 160         }
 161         return 0;
 162 }
 163
 164
 165 static int additional_roaming_consortiums(struct wpa_bss *bss)
 166 {
 167         const u8 *ie;
 168         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 169         if (ie == NULL || ie[1] == 0)
 170                 return 0;
 171         return ie[2]; /* Number of ANQP OIs */
 172 }
 173
 174
 175 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 176 {
 177         struct wpa_supplicant *wpa_s = eloop_ctx;
 178         interworking_next_anqp_fetch(wpa_s);
 179 }
 180
 181
 182 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 183                                       struct wpa_bss *bss)
 184 {
 185         struct wpabuf *buf;
 186         int ret = 0;
 187         int res;
 188         u16 info_ids[8];
 189         size_t num_info_ids = 0;
 190         struct wpabuf *extra = NULL;
 191         int all = wpa_s->fetch_all_anqp;
 192
 193         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 194                    MAC2STR(bss->bssid));
 195         wpa_s->interworking_gas_bss = bss;
 196
 197         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 198         if (all) {
 199                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 200                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 201         }
 202         if (all || (cred_with_roaming_consortium(wpa_s) &&
 203                     additional_roaming_consortiums(bss)))
 204                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 205         if (all)
 206                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 207         if (all || cred_with_nai_realm(wpa_s))
 208                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 209         if (all || cred_with_3gpp(wpa_s))
 210                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 211         if (all || cred_with_domain(wpa_s))
 212                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 213         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 214                     (u8 *) info_ids, num_info_ids * 2);
 215
 216 #ifdef CONFIG_HS20
 217         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 218                 u8 *len_pos;
 219
 220                 extra = wpabuf_alloc(100);
 221                 if (!extra)
 222                         return -1;
 223
 224                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 225                 wpabuf_put_be24(extra, OUI_WFA);
 226                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 227                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 228                 wpabuf_put_u8(extra, 0); /* Reserved */
 229                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 230                 if (all) {
 231                         wpabuf_put_u8(extra,
 232                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 233                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 234                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 235                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 236                 }
 237                 gas_anqp_set_element_len(extra, len_pos);
 238         }
 239 #endif /* CONFIG_HS20 */
 240
 241         buf = anqp_build_req(info_ids, num_info_ids, extra);
 242         wpabuf_free(extra);
 243         if (buf == NULL)
 244                 return -1;
 245
 246         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 247                             interworking_anqp_resp_cb, wpa_s);
 248         if (res < 0) {
 249                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 250                 wpabuf_free(buf);
 251                 ret = -1;
 252                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 253                                        NULL);
 254         } else
 255                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 256                            "%u", res);
 257
 258         return ret;
 259 }
 260
 261
 262 struct nai_realm_eap {
 263         u8 method;
 264         u8 inner_method;
 265         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 266         u8 cred_type;
 267         u8 tunneled_cred_type;
 268 };
 269
 270 struct nai_realm {
 271         u8 encoding;
 272         char *realm;
 273         u8 eap_count;
 274         struct nai_realm_eap *eap;
 275 };
 276
 277
 278 static void nai_realm_free(struct nai_realm *realms, u16 count)
 279 {
 280         u16 i;
 281
 282         if (realms == NULL)
 283                 return;
 284         for (i = 0; i < count; i++) {
 285                 os_free(realms[i].eap);
 286                 os_free(realms[i].realm);
 287         }
 288         os_free(realms);
 289 }
 290
 291
 292 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 293                                       const u8 *end)
 294 {
 295         u8 elen, auth_count, a;
 296         const u8 *e_end;
 297
 298         if (pos + 3 > end) {
 299                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 300                 return NULL;
 301         }
 302
 303         elen = *pos++;
 304         if (pos + elen > end || elen < 2) {
 305                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 306                 return NULL;
 307         }
 308         e_end = pos + elen;
 309         e->method = *pos++;
 310         auth_count = *pos++;
 311         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 312                    elen, e->method, auth_count);
 313
 314         for (a = 0; a < auth_count; a++) {
 315                 u8 id, len;
 316
 317                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 318                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 319                                    "Parameter subfield");
 320                         return NULL;
 321                 }
 322
 323                 id = *pos++;
 324                 len = *pos++;
 325
 326                 switch (id) {
 327                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 328                         if (len < 1)
 329                                 break;
 330                         e->inner_non_eap = *pos;
 331                         if (e->method != EAP_TYPE_TTLS)
 332                                 break;
 333                         switch (*pos) {
 334                         case NAI_REALM_INNER_NON_EAP_PAP:
 335                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 336                                 break;
 337                         case NAI_REALM_INNER_NON_EAP_CHAP:
 338                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 339                                 break;
 340                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 341                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 342                                 break;
 343                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 344                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 345                                 break;
 346                         }
 347                         break;
 348                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 349                         if (len < 1)
 350                                 break;
 351                         e->inner_method = *pos;
 352                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 353                                    e->inner_method);
 354                         break;
 355                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 356                         if (len < 1)
 357                                 break;
 358                         e->cred_type = *pos;
 359                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 360                                    e->cred_type);
 361                         break;
 362                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 363                         if (len < 1)
 364                                 break;
 365                         e->tunneled_cred_type = *pos;
 366                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 367                                    "Type: %u", e->tunneled_cred_type);
 368                         break;
 369                 default:
 370                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 371                                    "Parameter: id=%u len=%u", id, len);
 372                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 373                                     "Value", pos, len);
 374                         break;
 375                 }
 376
 377                 pos += len;
 378         }
 379
 380         return e_end;
 381 }
 382
 383
 384 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 385                                         const u8 *end)
 386 {
 387         u16 len;
 388         const u8 *f_end;
 389         u8 realm_len, e;
 390
 391         if (end - pos < 4) {
 392                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 393                            "fixed fields");
 394                 return NULL;
 395         }
 396
 397         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 398         pos += 2;
 399         if (pos + len > end || len < 3) {
 400                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 401                            "(len=%u; left=%u)",
 402                            len, (unsigned int) (end - pos));
 403                 return NULL;
 404         }
 405         f_end = pos + len;
 406
 407         r->encoding = *pos++;
 408         realm_len = *pos++;
 409         if (pos + realm_len > f_end) {
 410                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 411                            "(len=%u; left=%u)",
 412                            realm_len, (unsigned int) (f_end - pos));
 413                 return NULL;
 414         }
 415         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 416         r->realm = dup_binstr(pos, realm_len);
 417         if (r->realm == NULL)
 418                 return NULL;
 419         pos += realm_len;
 420
 421         if (pos + 1 > f_end) {
 422                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 423                 return NULL;
 424         }
 425         r->eap_count = *pos++;
 426         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 427         if (pos + r->eap_count * 3 > f_end) {
 428                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 429                 return NULL;
 430         }
 431         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 432         if (r->eap == NULL)
 433                 return NULL;
 434
 435         for (e = 0; e < r->eap_count; e++) {
 436                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 437                 if (pos == NULL)
 438                         return NULL;
 439         }
 440
 441         return f_end;
 442 }
 443
 444
 445 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 446 {
 447         struct nai_realm *realm;
 448         const u8 *pos, *end;
 449         u16 i, num;
 450
 451         if (anqp == NULL || wpabuf_len(anqp) < 2)
 452                 return NULL;
 453
 454         pos = wpabuf_head_u8(anqp);
 455         end = pos + wpabuf_len(anqp);
 456         num = WPA_GET_LE16(pos);
 457         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 458         pos += 2;
 459
 460         if (num * 5 > end - pos) {
 461                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 462                            "enough data (%u octets) for that many realms",
 463                            num, (unsigned int) (end - pos));
 464                 return NULL;
 465         }
 466
 467         realm = os_calloc(num, sizeof(struct nai_realm));
 468         if (realm == NULL)
 469                 return NULL;
 470
 471         for (i = 0; i < num; i++) {
 472                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 473                 if (pos == NULL) {
 474                         nai_realm_free(realm, num);
 475                         return NULL;
 476                 }
 477         }
 478
 479         *count = num;
 480         return realm;
 481 }
 482
 483
 484 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 485 {
 486         char *tmp, *pos, *end;
 487         int match = 0;
 488
 489         if (realm->realm == NULL || home_realm == NULL)
 490                 return 0;
 491
 492         if (os_strchr(realm->realm, ';') == NULL)
 493                 return os_strcasecmp(realm->realm, home_realm) == 0;
 494
 495         tmp = os_strdup(realm->realm);
 496         if (tmp == NULL)
 497                 return 0;
 498
 499         pos = tmp;
 500         while (*pos) {
 501                 end = os_strchr(pos, ';');
 502                 if (end)
 503                         *end = '\0';
 504                 if (os_strcasecmp(pos, home_realm) == 0) {
 505                         match = 1;
 506                         break;
 507                 }
 508                 if (end == NULL)
 509                         break;
 510                 pos = end + 1;
 511         }
 512
 513         os_free(tmp);
 514
 515         return match;
 516 }
 517
 518
 519 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 520 {
 521         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 522                 return 0; /* method not supported */
 523
 524         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
 525             eap->method != EAP_TYPE_FAST) {
 526                 /* Only tunneled methods with username/password supported */
 527                 return 0;
 528         }
 529
 530         if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
 531                 if (eap->inner_method &&
 532                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 533                         return 0;
 534                 if (!eap->inner_method &&
 535                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
 536                         return 0;
 537         }
 538
 539         if (eap->method == EAP_TYPE_TTLS) {
 540                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 541                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 542                 if (eap->inner_method &&
 543                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 544                         return 0;
 545                 if (eap->inner_non_eap &&
 546                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 547                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 548                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 549                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 550                         return 0;
 551         }
 552
 553         if (eap->inner_method &&
 554             eap->inner_method != EAP_TYPE_GTC &&
 555             eap->inner_method != EAP_TYPE_MSCHAPV2)
 556                 return 0;
 557
 558         return 1;
 559 }
 560
 561
 562 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 563 {
 564         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 565                 return 0; /* method not supported */
 566
 567         if (eap->method != EAP_TYPE_TLS) {
 568                 /* Only EAP-TLS supported for credential authentication */
 569                 return 0;
 570         }
 571
 572         return 1;
 573 }
 574
 575
 576 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 577                                                  struct nai_realm *realm)
 578 {
 579         u8 e;
 580
 581         if (cred == NULL ||
 582             cred->username == NULL ||
 583             cred->username[0] == '\0' ||
 584             ((cred->password == NULL ||
 585               cred->password[0] == '\0') &&
 586              (cred->private_key == NULL ||
 587               cred->private_key[0] == '\0')))
 588                 return NULL;
 589
 590         for (e = 0; e < realm->eap_count; e++) {
 591                 struct nai_realm_eap *eap = &realm->eap[e];
 592                 if (cred->password && cred->password[0] &&
 593                     nai_realm_cred_username(eap))
 594                         return eap;
 595                 if (cred->private_key && cred->private_key[0] &&
 596                     nai_realm_cred_cert(eap))
 597                         return eap;
 598         }
 599
 600         return NULL;
 601 }
 602
 603
 604 #ifdef INTERWORKING_3GPP
 605
 606 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 607 {
 608         u8 plmn[3], plmn2[3];
 609         const u8 *pos, *end;
 610         u8 udhl;
 611
 612         /*
 613          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 614          * operator is allowed to include only two digits of the MNC, so allow
 615          * matches based on both two and three digit MNC assumptions. Since some
 616          * SIM/USIM cards may not expose MNC length conveniently, we may be
 617          * provided the default MNC length 3 here and as such, checking with MNC
 618          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 619          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 620          * with otherwise matching values would not be good idea in general, so
 621          * this should not result in selecting incorrect networks.
 622          */
 623         /* Match with 3 digit MNC */
 624         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 625         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 626         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 627         /* Match with 2 digit MNC */
 628         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 629         plmn2[1] = (imsi[2] - '0') | 0xf0;
 630         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 631
 632         if (anqp == NULL)
 633                 return 0;
 634         pos = wpabuf_head_u8(anqp);
 635         end = pos + wpabuf_len(anqp);
 636         if (pos + 2 > end)
 637                 return 0;
 638         if (*pos != 0) {
 639                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 640                 return 0;
 641         }
 642         pos++;
 643         udhl = *pos++;
 644         if (pos + udhl > end) {
 645                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 646                 return 0;
 647         }
 648         end = pos + udhl;
 649
 650         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 651                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 652                    imsi, mnc_len);
 653
 654         while (pos + 2 <= end) {
 655                 u8 iei, len;
 656                 const u8 *l_end;
 657                 iei = *pos++;
 658                 len = *pos++ & 0x7f;
 659                 if (pos + len > end)
 660                         break;
 661                 l_end = pos + len;
 662
 663                 if (iei == 0 && len > 0) {
 664                         /* PLMN List */
 665                         u8 num, i;
 666                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 667                                     pos, len);
 668                         num = *pos++;
 669                         for (i = 0; i < num; i++) {
 670                                 if (pos + 3 > l_end)
 671                                         break;
 672                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 673                                     os_memcmp(pos, plmn2, 3) == 0)
 674                                         return 1; /* Found matching PLMN */
 675                                 pos += 3;
 676                         }
 677                 } else {
 678                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 679                                     pos, len);
 680                 }
 681
 682                 pos = l_end;
 683         }
 684
 685         return 0;
 686 }
 687
 688
 689 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 690                           size_t mnc_len, char prefix)
 691 {
 692         const char *sep, *msin;
 693         char *end, *pos;
 694         size_t msin_len, plmn_len;
 695
 696         /*
 697          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 698          * Root NAI:
 699          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 700          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 701          */
 702
 703         if (imsi == NULL || os_strlen(imsi) > 16) {
 704                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 705                 return -1;
 706         }
 707         sep = os_strchr(imsi, '-');
 708         if (sep) {
 709                 plmn_len = sep - imsi;
 710                 msin = sep + 1;
 711         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 712                 plmn_len = 3 + mnc_len;
 713                 msin = imsi + plmn_len;
 714         } else
 715                 return -1;
 716         if (plmn_len != 5 && plmn_len != 6)
 717                 return -1;
 718         msin_len = os_strlen(msin);
 719
 720         pos = nai;
 721         end = nai + nai_len;
 722         if (prefix)
 723                 *pos++ = prefix;
 724         os_memcpy(pos, imsi, plmn_len);
 725         pos += plmn_len;
 726         os_memcpy(pos, msin, msin_len);
 727         pos += msin_len;
 728         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 729         if (plmn_len == 5) {
 730                 *pos++ = '0';
 731                 *pos++ = imsi[3];
 732                 *pos++ = imsi[4];
 733         } else {
 734                 *pos++ = imsi[3];
 735                 *pos++ = imsi[4];
 736                 *pos++ = imsi[5];
 737         }
 738         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 739                            imsi[0], imsi[1], imsi[2]);
 740
 741         return 0;
 742 }
 743
 744
 745 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 746 {
 747         char nai[100];
 748         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 749                 return -1;
 750         return wpa_config_set_quoted(ssid, "identity", nai);
 751 }
 752
 753 #endif /* INTERWORKING_3GPP */
 754
 755
 756 static int already_connected(struct wpa_supplicant *wpa_s,
 757                              struct wpa_cred *cred, struct wpa_bss *bss)
 758 {
 759         struct wpa_ssid *ssid;
 760
 761         if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
 762                 return 0;
 763
 764         ssid = wpa_s->current_ssid;
 765         if (ssid->parent_cred != cred)
 766                 return 0;
 767
 768         if (ssid->ssid_len != bss->ssid_len ||
 769             os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 770                 return 0;
 771
 772         return 1;
 773 }
 774
 775
 776 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
 777                                      struct wpa_cred *cred,
 778                                      struct wpa_bss *bss)
 779 {
 780         struct wpa_ssid *ssid;
 781
 782         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 783                 if (ssid->parent_cred != cred)
 784                         continue;
 785                 if (ssid->ssid_len != bss->ssid_len ||
 786                     os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 787                         continue;
 788
 789                 break;
 790         }
 791
 792         if (ssid == NULL)
 793                 return;
 794
 795         wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
 796
 797         if (ssid == wpa_s->current_ssid) {
 798                 wpa_sm_set_config(wpa_s->wpa, NULL);
 799                 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 800                 wpa_supplicant_deauthenticate(wpa_s,
 801                                               WLAN_REASON_DEAUTH_LEAVING);
 802         }
 803
 804         wpas_notify_network_removed(wpa_s, ssid);
 805         wpa_config_remove_network(wpa_s->conf, ssid->id);
 806 }
 807
 808
 809 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 810                                         struct wpa_ssid *ssid)
 811 {
 812         if (wpa_config_set(ssid, "key_mgmt",
 813                            wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 814                            "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0)
 815                 return -1;
 816         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 817                 return -1;
 818         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 819                 return -1;
 820         return 0;
 821 }
 822
 823
 824 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 825                                      struct wpa_cred *cred,
 826                                      struct wpa_bss *bss)
 827 {
 828 #ifdef INTERWORKING_3GPP
 829         struct wpa_ssid *ssid;
 830         int eap_type;
 831         int res;
 832         char prefix;
 833
 834         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 835                 return -1;
 836
 837         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 838                    MAC2STR(bss->bssid));
 839
 840         if (already_connected(wpa_s, cred, bss)) {
 841                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
 842                         MAC2STR(bss->bssid));
 843                 return 0;
 844         }
 845
 846         remove_duplicate_network(wpa_s, cred, bss);
 847
 848         ssid = wpa_config_add_network(wpa_s->conf);
 849         if (ssid == NULL)
 850                 return -1;
 851         ssid->parent_cred = cred;
 852
 853         wpas_notify_network_added(wpa_s, ssid);
 854         wpa_config_set_network_defaults(ssid);
 855         ssid->priority = cred->priority;
 856         ssid->temporary = 1;
 857         ssid->ssid = os_zalloc(bss->ssid_len + 1);
 858         if (ssid->ssid == NULL)
 859                 goto fail;
 860         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 861         ssid->ssid_len = bss->ssid_len;
 862
 863         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 864                 goto fail;
 865
 866         eap_type = EAP_TYPE_SIM;
 867         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 868                 eap_type = EAP_TYPE_AKA;
 869         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
 870                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
 871                     cred->eap_method[0].method == EAP_TYPE_AKA ||
 872                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
 873                         eap_type = cred->eap_method[0].method;
 874         }
 875
 876         switch (eap_type) {
 877         case EAP_TYPE_SIM:
 878                 prefix = '1';
 879                 res = wpa_config_set(ssid, "eap", "SIM", 0);
 880                 break;
 881         case EAP_TYPE_AKA:
 882                 prefix = '0';
 883                 res = wpa_config_set(ssid, "eap", "AKA", 0);
 884                 break;
 885         case EAP_TYPE_AKA_PRIME:
 886                 prefix = '6';
 887                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
 888                 break;
 889         default:
 890                 res = -1;
 891                 break;
 892         }
 893         if (res < 0) {
 894                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
 895                            eap_type);
 896                 goto fail;
 897         }
 898
 899         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
 900                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 901                 goto fail;
 902         }
 903
 904         if (cred->milenage && cred->milenage[0]) {
 905                 if (wpa_config_set_quoted(ssid, "password",
 906                                           cred->milenage) < 0)
 907                         goto fail;
 908         } else if (cred->pcsc) {
 909                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 910                         goto fail;
 911                 if (wpa_s->conf->pcsc_pin &&
 912                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 913                     < 0)
 914                         goto fail;
 915         }
 916
 917         if (cred->password && cred->password[0] &&
 918             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 919                 goto fail;
 920
 921         wpa_config_update_prio_list(wpa_s->conf);
 922         interworking_reconnect(wpa_s);
 923
 924         return 0;
 925
 926 fail:
 927         wpas_notify_network_removed(wpa_s, ssid);
 928         wpa_config_remove_network(wpa_s->conf, ssid->id);
 929 #endif /* INTERWORKING_3GPP */
 930         return -1;
 931 }
 932
 933
 934 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 935                                             size_t rc_len)
 936 {
 937         const u8 *pos, *end;
 938         u8 lens;
 939
 940         if (ie == NULL)
 941                 return 0;
 942
 943         pos = ie + 2;
 944         end = ie + 2 + ie[1];
 945
 946         /* Roaming Consortium element:
 947          * Number of ANQP OIs
 948          * OI #1 and #2 lengths
 949          * OI #1, [OI #2], [OI #3]
 950          */
 951
 952         if (pos + 2 > end)
 953                 return 0;
 954
 955         pos++; /* skip Number of ANQP OIs */
 956         lens = *pos++;
 957         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 958                 return 0;
 959
 960         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 961                 return 1;
 962         pos += lens & 0x0f;
 963
 964         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 965                 return 1;
 966         pos += lens >> 4;
 967
 968         if (pos < end && (size_t) (end - pos) == rc_len &&
 969             os_memcmp(pos, rc_id, rc_len) == 0)
 970                 return 1;
 971
 972         return 0;
 973 }
 974
 975
 976 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 977                                          const u8 *rc_id, size_t rc_len)
 978 {
 979         const u8 *pos, *end;
 980         u8 len;
 981
 982         if (anqp == NULL)
 983                 return 0;
 984
 985         pos = wpabuf_head(anqp);
 986         end = pos + wpabuf_len(anqp);
 987
 988         /* Set of <OI Length, OI> duples */
 989         while (pos < end) {
 990                 len = *pos++;
 991                 if (pos + len > end)
 992                         break;
 993                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 994                         return 1;
 995                 pos += len;
 996         }
 997
 998         return 0;
 999 }
1000
1001
1002 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1003                                     const u8 *rc_id, size_t rc_len)
1004 {
1005         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1006                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1007 }
1008
1009
1010 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1011 {
1012         const u8 *ie;
1013
1014         if (cred->required_roaming_consortium_len == 0)
1015                 return 0;
1016
1017         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1018
1019         if (ie == NULL &&
1020             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1021                 return 1;
1022
1023         return !roaming_consortium_match(ie,
1024                                          bss->anqp ?
1025                                          bss->anqp->roaming_consortium : NULL,
1026                                          cred->required_roaming_consortium,
1027                                          cred->required_roaming_consortium_len);
1028 }
1029
1030
1031 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1032 {
1033         size_t i;
1034
1035         if (!cred->excluded_ssid)
1036                 return 0;
1037
1038         for (i = 0; i < cred->num_excluded_ssid; i++) {
1039                 struct excluded_ssid *e = &cred->excluded_ssid[i];
1040                 if (bss->ssid_len == e->ssid_len &&
1041                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1042                         return 1;
1043         }
1044
1045         return 0;
1046 }
1047
1048
1049 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1050         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1051 {
1052         struct wpa_cred *cred, *selected = NULL;
1053         const u8 *ie;
1054
1055         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1056
1057         if (ie == NULL &&
1058             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1059                 return NULL;
1060
1061         if (wpa_s->conf->cred == NULL)
1062                 return NULL;
1063
1064         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1065                 if (cred->roaming_consortium_len == 0)
1066                         continue;
1067
1068                 if (!roaming_consortium_match(ie,
1069                                               bss->anqp ?
1070                                               bss->anqp->roaming_consortium :
1071                                               NULL,
1072                                               cred->roaming_consortium,
1073                                               cred->roaming_consortium_len))
1074                         continue;
1075
1076                 if (cred_excluded_ssid(cred, bss))
1077                         continue;
1078                 if (cred_no_required_oi_match(cred, bss))
1079                         continue;
1080
1081                 if (selected == NULL ||
1082                     selected->priority < cred->priority)
1083                         selected = cred;
1084         }
1085
1086         return selected;
1087 }
1088
1089
1090 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1091                                        struct wpa_cred *cred, int ttls)
1092 {
1093         if (cred->eap_method) {
1094                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1095                         cred->eap_method->method == EAP_TYPE_TTLS;
1096
1097                 os_free(ssid->eap.eap_methods);
1098                 ssid->eap.eap_methods =
1099                         os_malloc(sizeof(struct eap_method_type) * 2);
1100                 if (ssid->eap.eap_methods == NULL)
1101                         return -1;
1102                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1103                           sizeof(*cred->eap_method));
1104                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1105                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1106         }
1107
1108         if (ttls && cred->username && cred->username[0]) {
1109                 const char *pos;
1110                 char *anon;
1111                 /* Use anonymous NAI in Phase 1 */
1112                 pos = os_strchr(cred->username, '@');
1113                 if (pos) {
1114                         size_t buflen = 9 + os_strlen(pos) + 1;
1115                         anon = os_malloc(buflen);
1116                         if (anon == NULL)
1117                                 return -1;
1118                         os_snprintf(anon, buflen, "anonymous%s", pos);
1119                 } else if (cred->realm) {
1120                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1121                         anon = os_malloc(buflen);
1122                         if (anon == NULL)
1123                                 return -1;
1124                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1125                 } else {
1126                         anon = os_strdup("anonymous");
1127                         if (anon == NULL)
1128                                 return -1;
1129                 }
1130                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1131                     0) {
1132                         os_free(anon);
1133                         return -1;
1134                 }
1135                 os_free(anon);
1136         }
1137
1138         if (cred->username && cred->username[0] &&
1139             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1140                 return -1;
1141
1142         if (cred->password && cred->password[0]) {
1143                 if (cred->ext_password &&
1144                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1145                         return -1;
1146                 if (!cred->ext_password &&
1147                     wpa_config_set_quoted(ssid, "password", cred->password) <
1148                     0)
1149                         return -1;
1150         }
1151
1152         if (cred->client_cert && cred->client_cert[0] &&
1153             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1154                 return -1;
1155
1156 #ifdef ANDROID
1157         if (cred->private_key &&
1158             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1159                 /* Use OpenSSL engine configuration for Android keystore */
1160                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1161                     wpa_config_set_quoted(ssid, "key_id",
1162                                           cred->private_key + 11) < 0 ||
1163                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1164                         return -1;
1165         } else
1166 #endif /* ANDROID */
1167         if (cred->private_key && cred->private_key[0] &&
1168             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1169                 return -1;
1170
1171         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1172             wpa_config_set_quoted(ssid, "private_key_passwd",
1173                                   cred->private_key_passwd) < 0)
1174                 return -1;
1175
1176         if (cred->phase1) {
1177                 os_free(ssid->eap.phase1);
1178                 ssid->eap.phase1 = os_strdup(cred->phase1);
1179         }
1180         if (cred->phase2) {
1181                 os_free(ssid->eap.phase2);
1182                 ssid->eap.phase2 = os_strdup(cred->phase2);
1183         }
1184
1185         if (cred->ca_cert && cred->ca_cert[0] &&
1186             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1187                 return -1;
1188
1189         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1190             wpa_config_set_quoted(ssid, "domain_suffix_match",
1191                                   cred->domain_suffix_match) < 0)
1192                 return -1;
1193
1194         return 0;
1195 }
1196
1197
1198 static int interworking_connect_roaming_consortium(
1199         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1200         struct wpa_bss *bss)
1201 {
1202         struct wpa_ssid *ssid;
1203
1204         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1205                    "roaming consortium match", MAC2STR(bss->bssid));
1206
1207         if (already_connected(wpa_s, cred, bss)) {
1208                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1209                         MAC2STR(bss->bssid));
1210                 return 0;
1211         }
1212
1213         remove_duplicate_network(wpa_s, cred, bss);
1214
1215         ssid = wpa_config_add_network(wpa_s->conf);
1216         if (ssid == NULL)
1217                 return -1;
1218         ssid->parent_cred = cred;
1219         wpas_notify_network_added(wpa_s, ssid);
1220         wpa_config_set_network_defaults(ssid);
1221         ssid->priority = cred->priority;
1222         ssid->temporary = 1;
1223         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1224         if (ssid->ssid == NULL)
1225                 goto fail;
1226         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1227         ssid->ssid_len = bss->ssid_len;
1228
1229         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1230                 goto fail;
1231
1232         if (cred->eap_method == NULL) {
1233                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1234                            "credential using roaming consortium");
1235                 goto fail;
1236         }
1237
1238         if (interworking_set_eap_params(
1239                     ssid, cred,
1240                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1241                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1242                 goto fail;
1243
1244         wpa_config_update_prio_list(wpa_s->conf);
1245         interworking_reconnect(wpa_s);
1246
1247         return 0;
1248
1249 fail:
1250         wpas_notify_network_removed(wpa_s, ssid);
1251         wpa_config_remove_network(wpa_s->conf, ssid->id);
1252         return -1;
1253 }
1254
1255
1256 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1257 {
1258         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1259         struct wpa_ssid *ssid;
1260         struct nai_realm *realm;
1261         struct nai_realm_eap *eap = NULL;
1262         u16 count, i;
1263         char buf[100];
1264
1265         if (wpa_s->conf->cred == NULL || bss == NULL)
1266                 return -1;
1267         if (disallowed_bssid(wpa_s, bss->bssid) ||
1268             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1269                 wpa_printf(MSG_DEBUG, "Interworking: Reject connection to disallowed BSS "
1270                            MACSTR, MAC2STR(bss->bssid));
1271                 return -1;
1272         }
1273
1274         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1275                 /*
1276                  * We currently support only HS 2.0 networks and those are
1277                  * required to use WPA2-Enterprise.
1278                  */
1279                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1280                            "RSN");
1281                 return -1;
1282         }
1283
1284         cred_rc = interworking_credentials_available_roaming_consortium(wpa_s,
1285                                                                         bss);
1286         if (cred_rc) {
1287                 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1288                            "consortium matching credential priority %d",
1289                            cred_rc->priority);
1290         }
1291
1292         cred = interworking_credentials_available_realm(wpa_s, bss);
1293         if (cred) {
1294                 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
1295                            "matching credential priority %d",
1296                            cred->priority);
1297         }
1298
1299         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss);
1300         if (cred_3gpp) {
1301                 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
1302                            "credential priority %d", cred_3gpp->priority);
1303         }
1304
1305         if (cred_rc &&
1306             (cred == NULL || cred_rc->priority >= cred->priority) &&
1307             (cred_3gpp == NULL || cred_rc->priority >= cred_3gpp->priority))
1308                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1309                                                                bss);
1310
1311         if (cred_3gpp &&
1312             (cred == NULL || cred_3gpp->priority >= cred->priority)) {
1313                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
1314         }
1315
1316         if (cred == NULL) {
1317                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1318                            "found for " MACSTR, MAC2STR(bss->bssid));
1319                 return -1;
1320         }
1321
1322         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1323                                 &count);
1324         if (realm == NULL) {
1325                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1326                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1327                 return -1;
1328         }
1329
1330         for (i = 0; i < count; i++) {
1331                 if (!nai_realm_match(&realm[i], cred->realm))
1332                         continue;
1333                 eap = nai_realm_find_eap(cred, &realm[i]);
1334                 if (eap)
1335                         break;
1336         }
1337
1338         if (!eap) {
1339                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1340                            "and EAP method found for " MACSTR,
1341                            MAC2STR(bss->bssid));
1342                 nai_realm_free(realm, count);
1343                 return -1;
1344         }
1345
1346         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1347                    MAC2STR(bss->bssid));
1348
1349         if (already_connected(wpa_s, cred, bss)) {
1350                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1351                         MAC2STR(bss->bssid));
1352                 nai_realm_free(realm, count);
1353                 return 0;
1354         }
1355
1356         remove_duplicate_network(wpa_s, cred, bss);
1357
1358         ssid = wpa_config_add_network(wpa_s->conf);
1359         if (ssid == NULL) {
1360                 nai_realm_free(realm, count);
1361                 return -1;
1362         }
1363         ssid->parent_cred = cred;
1364         wpas_notify_network_added(wpa_s, ssid);
1365         wpa_config_set_network_defaults(ssid);
1366         ssid->priority = cred->priority;
1367         ssid->temporary = 1;
1368         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1369         if (ssid->ssid == NULL)
1370                 goto fail;
1371         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1372         ssid->ssid_len = bss->ssid_len;
1373
1374         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1375                 goto fail;
1376
1377         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1378                                                      eap->method), 0) < 0)
1379                 goto fail;
1380
1381         switch (eap->method) {
1382         case EAP_TYPE_TTLS:
1383                 if (eap->inner_method) {
1384                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1385                                     eap_get_name(EAP_VENDOR_IETF,
1386                                                  eap->inner_method));
1387                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1388                                 goto fail;
1389                         break;
1390                 }
1391                 switch (eap->inner_non_eap) {
1392                 case NAI_REALM_INNER_NON_EAP_PAP:
1393                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1394                             0)
1395                                 goto fail;
1396                         break;
1397                 case NAI_REALM_INNER_NON_EAP_CHAP:
1398                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1399                             < 0)
1400                                 goto fail;
1401                         break;
1402                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1403                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1404                                            0) < 0)
1405                                 goto fail;
1406                         break;
1407                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1408                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1409                                            0) < 0)
1410                                 goto fail;
1411                         break;
1412                 default:
1413                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1414                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1415                                            0) < 0)
1416                                 goto fail;
1417                         break;
1418                 }
1419                 break;
1420         case EAP_TYPE_PEAP:
1421         case EAP_TYPE_FAST:
1422                 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1423                                    0) < 0)
1424                         goto fail;
1425                 if (wpa_config_set(ssid, "pac_file",
1426                                    "\"blob://pac_interworking\"", 0) < 0)
1427                         goto fail;
1428                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1429                             eap_get_name(EAP_VENDOR_IETF,
1430                                          eap->inner_method ?
1431                                          eap->inner_method :
1432                                          EAP_TYPE_MSCHAPV2));
1433                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1434                         goto fail;
1435                 break;
1436         case EAP_TYPE_TLS:
1437                 break;
1438         }
1439
1440         if (interworking_set_eap_params(ssid, cred,
1441                                         eap->method == EAP_TYPE_TTLS) < 0)
1442                 goto fail;
1443
1444         nai_realm_free(realm, count);
1445
1446         wpa_config_update_prio_list(wpa_s->conf);
1447         interworking_reconnect(wpa_s);
1448
1449         return 0;
1450
1451 fail:
1452         wpas_notify_network_removed(wpa_s, ssid);
1453         wpa_config_remove_network(wpa_s->conf, ssid->id);
1454         nai_realm_free(realm, count);
1455         return -1;
1456 }
1457
1458
1459 static struct wpa_cred * interworking_credentials_available_3gpp(
1460         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1461 {
1462         struct wpa_cred *selected = NULL;
1463 #ifdef INTERWORKING_3GPP
1464         struct wpa_cred *cred;
1465         int ret;
1466
1467         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1468                 return NULL;
1469
1470 #ifdef CONFIG_EAP_PROXY
1471         if (!wpa_s->imsi[0]) {
1472                 size_t len;
1473                 wpa_printf(MSG_DEBUG, "Interworking: IMSI not available - try to read again through eap_proxy");
1474                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1475                                                              wpa_s->imsi,
1476                                                              &len);
1477                 if (wpa_s->mnc_len > 0) {
1478                         wpa_s->imsi[len] = '\0';
1479                         wpa_printf(MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)",
1480                                    wpa_s->imsi, wpa_s->mnc_len);
1481                 } else {
1482                         wpa_printf(MSG_DEBUG, "eap_proxy: IMSI not available");
1483                 }
1484         }
1485 #endif /* CONFIG_EAP_PROXY */
1486
1487         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1488                 char *sep;
1489                 const char *imsi;
1490                 int mnc_len;
1491                 char imsi_buf[16];
1492                 size_t msin_len;
1493
1494 #ifdef PCSC_FUNCS
1495                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1496                     wpa_s->imsi[0]) {
1497                         imsi = wpa_s->imsi;
1498                         mnc_len = wpa_s->mnc_len;
1499                         goto compare;
1500                 }
1501 #endif /* PCSC_FUNCS */
1502 #ifdef CONFIG_EAP_PROXY
1503                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1504                         imsi = wpa_s->imsi;
1505                         mnc_len = wpa_s->mnc_len;
1506                         goto compare;
1507                 }
1508 #endif /* CONFIG_EAP_PROXY */
1509
1510                 if (cred->imsi == NULL || !cred->imsi[0] ||
1511                     (!wpa_s->conf->external_sim &&
1512                      (cred->milenage == NULL || !cred->milenage[0])))
1513                         continue;
1514
1515                 sep = os_strchr(cred->imsi, '-');
1516                 if (sep == NULL ||
1517                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1518                         continue;
1519                 mnc_len = sep - cred->imsi - 3;
1520                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1521                 sep++;
1522                 msin_len = os_strlen(cred->imsi);
1523                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1524                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1525                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1526                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1527                 imsi = imsi_buf;
1528
1529 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1530         compare:
1531 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1532                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1533                            MACSTR, MAC2STR(bss->bssid));
1534                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1535                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1536                 if (ret) {
1537                         if (cred_excluded_ssid(cred, bss))
1538                                 continue;
1539                         if (cred_no_required_oi_match(cred, bss))
1540                                 continue;
1541                         if (selected == NULL ||
1542                             selected->priority < cred->priority)
1543                                 selected = cred;
1544                 }
1545         }
1546 #endif /* INTERWORKING_3GPP */
1547         return selected;
1548 }
1549
1550
1551 static struct wpa_cred * interworking_credentials_available_realm(
1552         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1553 {
1554         struct wpa_cred *cred, *selected = NULL;
1555         struct nai_realm *realm;
1556         u16 count, i;
1557
1558         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1559                 return NULL;
1560
1561         if (wpa_s->conf->cred == NULL)
1562                 return NULL;
1563
1564         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1565                    MACSTR, MAC2STR(bss->bssid));
1566         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1567         if (realm == NULL) {
1568                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1569                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1570                 return NULL;
1571         }
1572
1573         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1574                 if (cred->realm == NULL)
1575                         continue;
1576
1577                 for (i = 0; i < count; i++) {
1578                         if (!nai_realm_match(&realm[i], cred->realm))
1579                                 continue;
1580                         if (nai_realm_find_eap(cred, &realm[i])) {
1581                                 if (cred_excluded_ssid(cred, bss))
1582                                         continue;
1583                                 if (cred_no_required_oi_match(cred, bss))
1584                                         continue;
1585                                 if (selected == NULL ||
1586                                     selected->priority < cred->priority)
1587                                         selected = cred;
1588                                 break;
1589                         }
1590                 }
1591         }
1592
1593         nai_realm_free(realm, count);
1594
1595         return selected;
1596 }
1597
1598
1599 static struct wpa_cred * interworking_credentials_available(
1600         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1601 {
1602         struct wpa_cred *cred, *cred2;
1603
1604         if (disallowed_bssid(wpa_s, bss->bssid) ||
1605             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1606                 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
1607                            MACSTR, MAC2STR(bss->bssid));
1608                 return NULL;
1609         }
1610
1611         cred = interworking_credentials_available_realm(wpa_s, bss);
1612         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1613         if (cred && cred2 && cred2->priority >= cred->priority)
1614                 cred = cred2;
1615         if (!cred)
1616                 cred = cred2;
1617
1618         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1619                                                                       bss);
1620         if (cred && cred2 && cred2->priority >= cred->priority)
1621                 cred = cred2;
1622         if (!cred)
1623                 cred = cred2;
1624
1625         return cred;
1626 }
1627
1628
1629 static int domain_name_list_contains(struct wpabuf *domain_names,
1630                                      const char *domain)
1631 {
1632         const u8 *pos, *end;
1633         size_t len;
1634
1635         len = os_strlen(domain);
1636         pos = wpabuf_head(domain_names);
1637         end = pos + wpabuf_len(domain_names);
1638
1639         while (pos + 1 < end) {
1640                 if (pos + 1 + pos[0] > end)
1641                         break;
1642
1643                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1644                                   pos + 1, pos[0]);
1645                 if (pos[0] == len &&
1646                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1647                         return 1;
1648
1649                 pos += 1 + pos[0];
1650         }
1651
1652         return 0;
1653 }
1654
1655
1656 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
1657                               struct wpa_cred *cred,
1658                               struct wpabuf *domain_names)
1659 {
1660         size_t i;
1661         int ret = -1;
1662 #ifdef INTERWORKING_3GPP
1663         char nai[100], *realm;
1664
1665         char *imsi = NULL;
1666         int mnc_len = 0;
1667         if (cred->imsi)
1668                 imsi = cred->imsi;
1669 #ifdef CONFIG_PCSC
1670         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1671                  wpa_s->scard && wpa_s->imsi[0]) {
1672                 imsi = wpa_s->imsi;
1673                 mnc_len = wpa_s->mnc_len;
1674         }
1675 #endif /* CONFIG_PCSC */
1676 #ifdef CONFIG_EAP_PROXY
1677         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1678                 imsi = wpa_s->imsi;
1679                 mnc_len = wpa_s->mnc_len;
1680         }
1681 #endif /* CONFIG_EAP_PROXY */
1682         if (domain_names &&
1683             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
1684                 realm = os_strchr(nai, '@');
1685                 if (realm)
1686                         realm++;
1687                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1688                            "with SIM/USIM domain %s", realm);
1689                 if (realm &&
1690                     domain_name_list_contains(domain_names, realm))
1691                         return 1;
1692                 if (realm)
1693                         ret = 0;
1694         }
1695 #endif /* INTERWORKING_3GPP */
1696
1697         if (domain_names == NULL || cred->domain == NULL)
1698                 return ret;
1699
1700         for (i = 0; i < cred->num_domain; i++) {
1701                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1702                            "home SP FQDN %s", cred->domain[i]);
1703                 if (domain_name_list_contains(domain_names, cred->domain[i]))
1704                         return 1;
1705         }
1706
1707         return 0;
1708 }
1709
1710
1711 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1712                                 struct wpabuf *domain_names)
1713 {
1714         struct wpa_cred *cred;
1715
1716         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1717                 return -1;
1718
1719         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1720                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
1721                 if (res)
1722                         return res;
1723         }
1724
1725         return 0;
1726 }
1727
1728
1729 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1730 {
1731         struct wpa_bss *bss;
1732         struct wpa_ssid *ssid;
1733
1734         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1735                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1736                         if (wpas_network_disabled(wpa_s, ssid) ||
1737                             ssid->mode != WPAS_MODE_INFRA)
1738                                 continue;
1739                         if (ssid->ssid_len != bss->ssid_len ||
1740                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1741                             0)
1742                                 continue;
1743                         /*
1744                          * TODO: Consider more accurate matching of security
1745                          * configuration similarly to what is done in events.c
1746                          */
1747                         return 1;
1748                 }
1749         }
1750
1751         return 0;
1752 }
1753
1754
1755 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1756 {
1757         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1758         int selected_prio = -999999, selected_home_prio = -999999;
1759         unsigned int count = 0;
1760         const char *type;
1761         int res;
1762         struct wpa_cred *cred;
1763
1764         wpa_s->network_select = 0;
1765
1766         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1767                 cred = interworking_credentials_available(wpa_s, bss);
1768                 if (!cred)
1769                         continue;
1770                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1771                         /*
1772                          * We currently support only HS 2.0 networks and those
1773                          * are required to use WPA2-Enterprise.
1774                          */
1775                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1776                                    "with " MACSTR " but network does not use "
1777                                    "RSN", MAC2STR(bss->bssid));
1778                         continue;
1779                 }
1780                 count++;
1781                 res = interworking_home_sp(wpa_s, bss->anqp ?
1782                                            bss->anqp->domain_name : NULL);
1783                 if (res > 0)
1784                         type = "home";
1785                 else if (res == 0)
1786                         type = "roaming";
1787                 else
1788                         type = "unknown";
1789                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1790                         MAC2STR(bss->bssid), type);
1791                 if (wpa_s->auto_select ||
1792                     (wpa_s->conf->auto_interworking &&
1793                      wpa_s->auto_network_select)) {
1794                         if (selected == NULL ||
1795                             cred->priority > selected_prio) {
1796                                 selected = bss;
1797                                 selected_prio = cred->priority;
1798                         }
1799                         if (res > 0 &&
1800                             (selected_home == NULL ||
1801                              cred->priority > selected_home_prio)) {
1802                                 selected_home = bss;
1803                                 selected_home_prio = cred->priority;
1804                         }
1805                 }
1806         }
1807
1808         if (selected_home && selected_home != selected &&
1809             selected_home_prio >= selected_prio) {
1810                 /* Prefer network operated by the Home SP */
1811                 selected = selected_home;
1812         }
1813
1814         if (count == 0) {
1815                 /*
1816                  * No matching network was found based on configured
1817                  * credentials. Check whether any of the enabled network blocks
1818                  * have matching APs.
1819                  */
1820                 if (interworking_find_network_match(wpa_s)) {
1821                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1822                                    "match for enabled network configurations");
1823                         if (wpa_s->auto_select)
1824                                 interworking_reconnect(wpa_s);
1825                         return;
1826                 }
1827
1828                 if (wpa_s->auto_network_select) {
1829                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1830                                    "scanning after ANQP fetch");
1831                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1832                                                 0);
1833                         return;
1834                 }
1835
1836                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1837                         "with matching credentials found");
1838         }
1839
1840         if (selected)
1841                 interworking_connect(wpa_s, selected);
1842 }
1843
1844
1845 static struct wpa_bss_anqp *
1846 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1847 {
1848         struct wpa_bss *other;
1849
1850         if (is_zero_ether_addr(bss->hessid))
1851                 return NULL; /* Cannot be in the same homegenous ESS */
1852
1853         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1854                 if (other == bss)
1855                         continue;
1856                 if (other->anqp == NULL)
1857                         continue;
1858                 if (other->anqp->roaming_consortium == NULL &&
1859                     other->anqp->nai_realm == NULL &&
1860                     other->anqp->anqp_3gpp == NULL &&
1861                     other->anqp->domain_name == NULL)
1862                         continue;
1863                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1864                         continue;
1865                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1866                         continue;
1867                 if (bss->ssid_len != other->ssid_len ||
1868                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1869                         continue;
1870
1871                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1872                            "already fetched BSSID " MACSTR " and " MACSTR,
1873                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1874                 other->anqp->users++;
1875                 return other->anqp;
1876         }
1877
1878         return NULL;
1879 }
1880
1881
1882 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1883 {
1884         struct wpa_bss *bss;
1885         int found = 0;
1886         const u8 *ie;
1887
1888         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress)
1889                 return;
1890
1891         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1892                 if (!(bss->caps & IEEE80211_CAP_ESS))
1893                         continue;
1894                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1895                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1896                         continue; /* AP does not support Interworking */
1897                 if (disallowed_bssid(wpa_s, bss->bssid) ||
1898                     disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
1899                         continue; /* Disallowed BSS */
1900
1901                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1902                         if (bss->anqp == NULL) {
1903                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1904                                                                          bss);
1905                                 if (bss->anqp) {
1906                                         /* Shared data already fetched */
1907                                         continue;
1908                                 }
1909                                 bss->anqp = wpa_bss_anqp_alloc();
1910                                 if (bss->anqp == NULL)
1911                                         break;
1912                         }
1913                         found++;
1914                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1915                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1916                                 MACSTR, MAC2STR(bss->bssid));
1917                         interworking_anqp_send_req(wpa_s, bss);
1918                         break;
1919                 }
1920         }
1921
1922         if (found == 0) {
1923                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1924                 wpa_s->fetch_anqp_in_progress = 0;
1925                 if (wpa_s->network_select)
1926                         interworking_select_network(wpa_s);
1927         }
1928 }
1929
1930
1931 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1932 {
1933         struct wpa_bss *bss;
1934
1935         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1936                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1937
1938         wpa_s->fetch_anqp_in_progress = 1;
1939         interworking_next_anqp_fetch(wpa_s);
1940 }
1941
1942
1943 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1944 {
1945         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1946                 return 0;
1947
1948         wpa_s->network_select = 0;
1949         wpa_s->fetch_all_anqp = 1;
1950
1951         interworking_start_fetch_anqp(wpa_s);
1952
1953         return 0;
1954 }
1955
1956
1957 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1958 {
1959         if (!wpa_s->fetch_anqp_in_progress)
1960                 return;
1961
1962         wpa_s->fetch_anqp_in_progress = 0;
1963 }
1964
1965
1966 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1967                   u16 info_ids[], size_t num_ids)
1968 {
1969         struct wpabuf *buf;
1970         int ret = 0;
1971         int freq;
1972         struct wpa_bss *bss;
1973         int res;
1974
1975         freq = wpa_s->assoc_freq;
1976         bss = wpa_bss_get_bssid(wpa_s, dst);
1977         if (bss) {
1978                 wpa_bss_anqp_unshare_alloc(bss);
1979                 freq = bss->freq;
1980         }
1981         if (freq <= 0)
1982                 return -1;
1983
1984         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1985                    MAC2STR(dst), (unsigned int) num_ids);
1986
1987         buf = anqp_build_req(info_ids, num_ids, NULL);
1988         if (buf == NULL)
1989                 return -1;
1990
1991         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1992         if (res < 0) {
1993                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1994                 wpabuf_free(buf);
1995                 ret = -1;
1996         } else
1997                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1998                            "%u", res);
1999
2000         return ret;
2001 }
2002
2003
2004 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2005                                             struct wpa_bss *bss, const u8 *sa,
2006                                             u16 info_id,
2007                                             const u8 *data, size_t slen)
2008 {
2009         const u8 *pos = data;
2010         struct wpa_bss_anqp *anqp = NULL;
2011 #ifdef CONFIG_HS20
2012         u8 type;
2013 #endif /* CONFIG_HS20 */
2014
2015         if (bss)
2016                 anqp = bss->anqp;
2017
2018         switch (info_id) {
2019         case ANQP_CAPABILITY_LIST:
2020                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2021                         " ANQP Capability list", MAC2STR(sa));
2022                 break;
2023         case ANQP_VENUE_NAME:
2024                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2025                         " Venue Name", MAC2STR(sa));
2026                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2027                 if (anqp) {
2028                         wpabuf_free(anqp->venue_name);
2029                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2030                 }
2031                 break;
2032         case ANQP_NETWORK_AUTH_TYPE:
2033                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2034                         " Network Authentication Type information",
2035                         MAC2STR(sa));
2036                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2037                                   "Type", pos, slen);
2038                 if (anqp) {
2039                         wpabuf_free(anqp->network_auth_type);
2040                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2041                 }
2042                 break;
2043         case ANQP_ROAMING_CONSORTIUM:
2044                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2045                         " Roaming Consortium list", MAC2STR(sa));
2046                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2047                                   pos, slen);
2048                 if (anqp) {
2049                         wpabuf_free(anqp->roaming_consortium);
2050                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2051                 }
2052                 break;
2053         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2054                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2055                         " IP Address Type Availability information",
2056                         MAC2STR(sa));
2057                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2058                             pos, slen);
2059                 if (anqp) {
2060                         wpabuf_free(anqp->ip_addr_type_availability);
2061                         anqp->ip_addr_type_availability =
2062                                 wpabuf_alloc_copy(pos, slen);
2063                 }
2064                 break;
2065         case ANQP_NAI_REALM:
2066                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2067                         " NAI Realm list", MAC2STR(sa));
2068                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2069                 if (anqp) {
2070                         wpabuf_free(anqp->nai_realm);
2071                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2072                 }
2073                 break;
2074         case ANQP_3GPP_CELLULAR_NETWORK:
2075                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2076                         " 3GPP Cellular Network information", MAC2STR(sa));
2077                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2078                                   pos, slen);
2079                 if (anqp) {
2080                         wpabuf_free(anqp->anqp_3gpp);
2081                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2082                 }
2083                 break;
2084         case ANQP_DOMAIN_NAME:
2085                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2086                         " Domain Name list", MAC2STR(sa));
2087                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2088                 if (anqp) {
2089                         wpabuf_free(anqp->domain_name);
2090                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2091                 }
2092                 break;
2093         case ANQP_VENDOR_SPECIFIC:
2094                 if (slen < 3)
2095                         return;
2096
2097                 switch (WPA_GET_BE24(pos)) {
2098 #ifdef CONFIG_HS20
2099                 case OUI_WFA:
2100                         pos += 3;
2101                         slen -= 3;
2102
2103                         if (slen < 1)
2104                                 return;
2105                         type = *pos++;
2106                         slen--;
2107
2108                         switch (type) {
2109                         case HS20_ANQP_OUI_TYPE:
2110                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
2111                                                              slen);
2112                                 break;
2113                         default:
2114                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
2115                                            "vendor type %u", type);
2116                                 break;
2117                         }
2118                         break;
2119 #endif /* CONFIG_HS20 */
2120                 default:
2121                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
2122                                    "vendor-specific ANQP OUI %06x",
2123                                    WPA_GET_BE24(pos));
2124                         return;
2125                 }
2126                 break;
2127         default:
2128                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
2129                            "%u", info_id);
2130                 break;
2131         }
2132 }
2133
2134
2135 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2136                   enum gas_query_result result,
2137                   const struct wpabuf *adv_proto,
2138                   const struct wpabuf *resp, u16 status_code)
2139 {
2140         struct wpa_supplicant *wpa_s = ctx;
2141         const u8 *pos;
2142         const u8 *end;
2143         u16 info_id;
2144         u16 slen;
2145         struct wpa_bss *bss = NULL, *tmp;
2146
2147         if (result != GAS_QUERY_SUCCESS)
2148                 return;
2149
2150         pos = wpabuf_head(adv_proto);
2151         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2152             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2153                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
2154                            "Protocol in response");
2155                 return;
2156         }
2157
2158         /*
2159          * If possible, select the BSS entry based on which BSS entry was used
2160          * for the request. This can help in cases where multiple BSS entries
2161          * may exist for the same AP.
2162          */
2163         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2164                 if (tmp == wpa_s->interworking_gas_bss &&
2165                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2166                         bss = tmp;
2167                         break;
2168                 }
2169         }
2170         if (bss == NULL)
2171                 bss = wpa_bss_get_bssid(wpa_s, dst);
2172
2173         pos = wpabuf_head(resp);
2174         end = pos + wpabuf_len(resp);
2175
2176         while (pos < end) {
2177                 if (pos + 4 > end) {
2178                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
2179                         break;
2180                 }
2181                 info_id = WPA_GET_LE16(pos);
2182                 pos += 2;
2183                 slen = WPA_GET_LE16(pos);
2184                 pos += 2;
2185                 if (pos + slen > end) {
2186                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
2187                                    "for Info ID %u", info_id);
2188                         break;
2189                 }
2190                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2191                                                 slen);
2192                 pos += slen;
2193         }
2194 }
2195
2196
2197 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2198                                           struct wpa_scan_results *scan_res)
2199 {
2200         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2201                    "ANQP fetch");
2202         interworking_start_fetch_anqp(wpa_s);
2203 }
2204
2205
2206 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
2207                         int *freqs)
2208 {
2209         interworking_stop_fetch_anqp(wpa_s);
2210         wpa_s->network_select = 1;
2211         wpa_s->auto_network_select = 0;
2212         wpa_s->auto_select = !!auto_select;
2213         wpa_s->fetch_all_anqp = 0;
2214         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2215                    "selection");
2216         wpa_s->scan_res_handler = interworking_scan_res_handler;
2217         wpa_s->normal_scans = 0;
2218         wpa_s->scan_req = MANUAL_SCAN_REQ;
2219         os_free(wpa_s->manual_scan_freqs);
2220         wpa_s->manual_scan_freqs = freqs;
2221         wpa_s->after_wps = 0;
2222         wpa_s->known_wps_freq = 0;
2223         wpa_supplicant_req_scan(wpa_s, 0, 0);
2224
2225         return 0;
2226 }
2227
2228
2229 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2230                         enum gas_query_result result,
2231                         const struct wpabuf *adv_proto,
2232                         const struct wpabuf *resp, u16 status_code)
2233 {
2234         struct wpa_supplicant *wpa_s = ctx;
2235         struct wpabuf *n;
2236
2237         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2238                 " dialog_token=%d status_code=%d resp_len=%d",
2239                 MAC2STR(addr), dialog_token, status_code,
2240                 resp ? (int) wpabuf_len(resp) : -1);
2241         if (!resp)
2242                 return;
2243
2244         n = wpabuf_dup(resp);
2245         if (n == NULL)
2246                 return;
2247         wpabuf_free(wpa_s->prev_gas_resp);
2248         wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
2249         os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
2250         wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
2251         wpa_s->last_gas_resp = n;
2252         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2253         wpa_s->last_gas_dialog_token = dialog_token;
2254 }
2255
2256
2257 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2258                      const struct wpabuf *adv_proto,
2259                      const struct wpabuf *query)
2260 {
2261         struct wpabuf *buf;
2262         int ret = 0;
2263         int freq;
2264         struct wpa_bss *bss;
2265         int res;
2266         size_t len;
2267         u8 query_resp_len_limit = 0, pame_bi = 0;
2268
2269         freq = wpa_s->assoc_freq;
2270         bss = wpa_bss_get_bssid(wpa_s, dst);
2271         if (bss)
2272                 freq = bss->freq;
2273         if (freq <= 0)
2274                 return -1;
2275
2276         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2277                    MAC2STR(dst), freq);
2278         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2279         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2280
2281         len = 3 + wpabuf_len(adv_proto) + 2;
2282         if (query)
2283                 len += wpabuf_len(query);
2284         buf = gas_build_initial_req(0, len);
2285         if (buf == NULL)
2286                 return -1;
2287
2288         /* Advertisement Protocol IE */
2289         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2290         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2291         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2292                       (pame_bi ? 0x80 : 0));
2293         wpabuf_put_buf(buf, adv_proto);
2294
2295         /* GAS Query */
2296         if (query) {
2297                 wpabuf_put_le16(buf, wpabuf_len(query));
2298                 wpabuf_put_buf(buf, query);
2299         } else
2300                 wpabuf_put_le16(buf, 0);
2301
2302         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2303         if (res < 0) {
2304                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2305                 wpabuf_free(buf);
2306                 ret = -1;
2307         } else
2308                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2309                            "%u", res);
2310
2311         return ret;
2312 }