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_s->next_ssid = ssid;
 922         wpa_config_update_prio_list(wpa_s->conf);
 923         interworking_reconnect(wpa_s);
 924
 925         return 0;
 926
 927 fail:
 928         wpas_notify_network_removed(wpa_s, ssid);
 929         wpa_config_remove_network(wpa_s->conf, ssid->id);
 930 #endif /* INTERWORKING_3GPP */
 931         return -1;
 932 }
 933
 934
 935 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 936                                             size_t rc_len)
 937 {
 938         const u8 *pos, *end;
 939         u8 lens;
 940
 941         if (ie == NULL)
 942                 return 0;
 943
 944         pos = ie + 2;
 945         end = ie + 2 + ie[1];
 946
 947         /* Roaming Consortium element:
 948          * Number of ANQP OIs
 949          * OI #1 and #2 lengths
 950          * OI #1, [OI #2], [OI #3]
 951          */
 952
 953         if (pos + 2 > end)
 954                 return 0;
 955
 956         pos++; /* skip Number of ANQP OIs */
 957         lens = *pos++;
 958         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 959                 return 0;
 960
 961         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 962                 return 1;
 963         pos += lens & 0x0f;
 964
 965         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 966                 return 1;
 967         pos += lens >> 4;
 968
 969         if (pos < end && (size_t) (end - pos) == rc_len &&
 970             os_memcmp(pos, rc_id, rc_len) == 0)
 971                 return 1;
 972
 973         return 0;
 974 }
 975
 976
 977 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 978                                          const u8 *rc_id, size_t rc_len)
 979 {
 980         const u8 *pos, *end;
 981         u8 len;
 982
 983         if (anqp == NULL)
 984                 return 0;
 985
 986         pos = wpabuf_head(anqp);
 987         end = pos + wpabuf_len(anqp);
 988
 989         /* Set of <OI Length, OI> duples */
 990         while (pos < end) {
 991                 len = *pos++;
 992                 if (pos + len > end)
 993                         break;
 994                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 995                         return 1;
 996                 pos += len;
 997         }
 998
 999         return 0;
1000 }
1001
1002
1003 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1004                                     const u8 *rc_id, size_t rc_len)
1005 {
1006         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1007                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1008 }
1009
1010
1011 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1012 {
1013         const u8 *ie;
1014
1015         if (cred->required_roaming_consortium_len == 0)
1016                 return 0;
1017
1018         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1019
1020         if (ie == NULL &&
1021             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1022                 return 1;
1023
1024         return !roaming_consortium_match(ie,
1025                                          bss->anqp ?
1026                                          bss->anqp->roaming_consortium : NULL,
1027                                          cred->required_roaming_consortium,
1028                                          cred->required_roaming_consortium_len);
1029 }
1030
1031
1032 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1033 {
1034         size_t i;
1035
1036         if (!cred->excluded_ssid)
1037                 return 0;
1038
1039         for (i = 0; i < cred->num_excluded_ssid; i++) {
1040                 struct excluded_ssid *e = &cred->excluded_ssid[i];
1041                 if (bss->ssid_len == e->ssid_len &&
1042                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1043                         return 1;
1044         }
1045
1046         return 0;
1047 }
1048
1049
1050 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1051         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1052 {
1053         struct wpa_cred *cred, *selected = NULL;
1054         const u8 *ie;
1055
1056         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1057
1058         if (ie == NULL &&
1059             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1060                 return NULL;
1061
1062         if (wpa_s->conf->cred == NULL)
1063                 return NULL;
1064
1065         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1066                 if (cred->roaming_consortium_len == 0)
1067                         continue;
1068
1069                 if (!roaming_consortium_match(ie,
1070                                               bss->anqp ?
1071                                               bss->anqp->roaming_consortium :
1072                                               NULL,
1073                                               cred->roaming_consortium,
1074                                               cred->roaming_consortium_len))
1075                         continue;
1076
1077                 if (cred_excluded_ssid(cred, bss))
1078                         continue;
1079                 if (cred_no_required_oi_match(cred, bss))
1080                         continue;
1081
1082                 if (selected == NULL ||
1083                     selected->priority < cred->priority)
1084                         selected = cred;
1085         }
1086
1087         return selected;
1088 }
1089
1090
1091 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1092                                        struct wpa_cred *cred, int ttls)
1093 {
1094         if (cred->eap_method) {
1095                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1096                         cred->eap_method->method == EAP_TYPE_TTLS;
1097
1098                 os_free(ssid->eap.eap_methods);
1099                 ssid->eap.eap_methods =
1100                         os_malloc(sizeof(struct eap_method_type) * 2);
1101                 if (ssid->eap.eap_methods == NULL)
1102                         return -1;
1103                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1104                           sizeof(*cred->eap_method));
1105                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1106                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1107         }
1108
1109         if (ttls && cred->username && cred->username[0]) {
1110                 const char *pos;
1111                 char *anon;
1112                 /* Use anonymous NAI in Phase 1 */
1113                 pos = os_strchr(cred->username, '@');
1114                 if (pos) {
1115                         size_t buflen = 9 + os_strlen(pos) + 1;
1116                         anon = os_malloc(buflen);
1117                         if (anon == NULL)
1118                                 return -1;
1119                         os_snprintf(anon, buflen, "anonymous%s", pos);
1120                 } else if (cred->realm) {
1121                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1122                         anon = os_malloc(buflen);
1123                         if (anon == NULL)
1124                                 return -1;
1125                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1126                 } else {
1127                         anon = os_strdup("anonymous");
1128                         if (anon == NULL)
1129                                 return -1;
1130                 }
1131                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1132                     0) {
1133                         os_free(anon);
1134                         return -1;
1135                 }
1136                 os_free(anon);
1137         }
1138
1139         if (cred->username && cred->username[0] &&
1140             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1141                 return -1;
1142
1143         if (cred->password && cred->password[0]) {
1144                 if (cred->ext_password &&
1145                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1146                         return -1;
1147                 if (!cred->ext_password &&
1148                     wpa_config_set_quoted(ssid, "password", cred->password) <
1149                     0)
1150                         return -1;
1151         }
1152
1153         if (cred->client_cert && cred->client_cert[0] &&
1154             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1155                 return -1;
1156
1157 #ifdef ANDROID
1158         if (cred->private_key &&
1159             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1160                 /* Use OpenSSL engine configuration for Android keystore */
1161                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1162                     wpa_config_set_quoted(ssid, "key_id",
1163                                           cred->private_key + 11) < 0 ||
1164                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1165                         return -1;
1166         } else
1167 #endif /* ANDROID */
1168         if (cred->private_key && cred->private_key[0] &&
1169             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1170                 return -1;
1171
1172         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1173             wpa_config_set_quoted(ssid, "private_key_passwd",
1174                                   cred->private_key_passwd) < 0)
1175                 return -1;
1176
1177         if (cred->phase1) {
1178                 os_free(ssid->eap.phase1);
1179                 ssid->eap.phase1 = os_strdup(cred->phase1);
1180         }
1181         if (cred->phase2) {
1182                 os_free(ssid->eap.phase2);
1183                 ssid->eap.phase2 = os_strdup(cred->phase2);
1184         }
1185
1186         if (cred->ca_cert && cred->ca_cert[0] &&
1187             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1188                 return -1;
1189
1190         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1191             wpa_config_set_quoted(ssid, "domain_suffix_match",
1192                                   cred->domain_suffix_match) < 0)
1193                 return -1;
1194
1195         return 0;
1196 }
1197
1198
1199 static int interworking_connect_roaming_consortium(
1200         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1201         struct wpa_bss *bss)
1202 {
1203         struct wpa_ssid *ssid;
1204
1205         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1206                    "roaming consortium match", MAC2STR(bss->bssid));
1207
1208         if (already_connected(wpa_s, cred, bss)) {
1209                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1210                         MAC2STR(bss->bssid));
1211                 return 0;
1212         }
1213
1214         remove_duplicate_network(wpa_s, cred, bss);
1215
1216         ssid = wpa_config_add_network(wpa_s->conf);
1217         if (ssid == NULL)
1218                 return -1;
1219         ssid->parent_cred = cred;
1220         wpas_notify_network_added(wpa_s, ssid);
1221         wpa_config_set_network_defaults(ssid);
1222         ssid->priority = cred->priority;
1223         ssid->temporary = 1;
1224         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1225         if (ssid->ssid == NULL)
1226                 goto fail;
1227         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1228         ssid->ssid_len = bss->ssid_len;
1229
1230         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1231                 goto fail;
1232
1233         if (cred->eap_method == NULL) {
1234                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1235                            "credential using roaming consortium");
1236                 goto fail;
1237         }
1238
1239         if (interworking_set_eap_params(
1240                     ssid, cred,
1241                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1242                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1243                 goto fail;
1244
1245         wpa_s->next_ssid = ssid;
1246         wpa_config_update_prio_list(wpa_s->conf);
1247         interworking_reconnect(wpa_s);
1248
1249         return 0;
1250
1251 fail:
1252         wpas_notify_network_removed(wpa_s, ssid);
1253         wpa_config_remove_network(wpa_s->conf, ssid->id);
1254         return -1;
1255 }
1256
1257
1258 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1259 {
1260         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1261         struct wpa_ssid *ssid;
1262         struct nai_realm *realm;
1263         struct nai_realm_eap *eap = NULL;
1264         u16 count, i;
1265         char buf[100];
1266
1267         if (wpa_s->conf->cred == NULL || bss == NULL)
1268                 return -1;
1269         if (disallowed_bssid(wpa_s, bss->bssid) ||
1270             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1271                 wpa_printf(MSG_DEBUG, "Interworking: Reject connection to disallowed BSS "
1272                            MACSTR, MAC2STR(bss->bssid));
1273                 return -1;
1274         }
1275
1276         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1277                 /*
1278                  * We currently support only HS 2.0 networks and those are
1279                  * required to use WPA2-Enterprise.
1280                  */
1281                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1282                            "RSN");
1283                 return -1;
1284         }
1285
1286         cred_rc = interworking_credentials_available_roaming_consortium(wpa_s,
1287                                                                         bss);
1288         if (cred_rc) {
1289                 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1290                            "consortium matching credential priority %d",
1291                            cred_rc->priority);
1292         }
1293
1294         cred = interworking_credentials_available_realm(wpa_s, bss);
1295         if (cred) {
1296                 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
1297                            "matching credential priority %d",
1298                            cred->priority);
1299         }
1300
1301         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss);
1302         if (cred_3gpp) {
1303                 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
1304                            "credential priority %d", cred_3gpp->priority);
1305         }
1306
1307         if (cred_rc &&
1308             (cred == NULL || cred_rc->priority >= cred->priority) &&
1309             (cred_3gpp == NULL || cred_rc->priority >= cred_3gpp->priority))
1310                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1311                                                                bss);
1312
1313         if (cred_3gpp &&
1314             (cred == NULL || cred_3gpp->priority >= cred->priority)) {
1315                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
1316         }
1317
1318         if (cred == NULL) {
1319                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1320                            "found for " MACSTR, MAC2STR(bss->bssid));
1321                 return -1;
1322         }
1323
1324         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1325                                 &count);
1326         if (realm == NULL) {
1327                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1328                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1329                 return -1;
1330         }
1331
1332         for (i = 0; i < count; i++) {
1333                 if (!nai_realm_match(&realm[i], cred->realm))
1334                         continue;
1335                 eap = nai_realm_find_eap(cred, &realm[i]);
1336                 if (eap)
1337                         break;
1338         }
1339
1340         if (!eap) {
1341                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1342                            "and EAP method found for " MACSTR,
1343                            MAC2STR(bss->bssid));
1344                 nai_realm_free(realm, count);
1345                 return -1;
1346         }
1347
1348         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1349                    MAC2STR(bss->bssid));
1350
1351         if (already_connected(wpa_s, cred, bss)) {
1352                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1353                         MAC2STR(bss->bssid));
1354                 nai_realm_free(realm, count);
1355                 return 0;
1356         }
1357
1358         remove_duplicate_network(wpa_s, cred, bss);
1359
1360         ssid = wpa_config_add_network(wpa_s->conf);
1361         if (ssid == NULL) {
1362                 nai_realm_free(realm, count);
1363                 return -1;
1364         }
1365         ssid->parent_cred = cred;
1366         wpas_notify_network_added(wpa_s, ssid);
1367         wpa_config_set_network_defaults(ssid);
1368         ssid->priority = cred->priority;
1369         ssid->temporary = 1;
1370         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1371         if (ssid->ssid == NULL)
1372                 goto fail;
1373         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1374         ssid->ssid_len = bss->ssid_len;
1375
1376         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1377                 goto fail;
1378
1379         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1380                                                      eap->method), 0) < 0)
1381                 goto fail;
1382
1383         switch (eap->method) {
1384         case EAP_TYPE_TTLS:
1385                 if (eap->inner_method) {
1386                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1387                                     eap_get_name(EAP_VENDOR_IETF,
1388                                                  eap->inner_method));
1389                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1390                                 goto fail;
1391                         break;
1392                 }
1393                 switch (eap->inner_non_eap) {
1394                 case NAI_REALM_INNER_NON_EAP_PAP:
1395                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1396                             0)
1397                                 goto fail;
1398                         break;
1399                 case NAI_REALM_INNER_NON_EAP_CHAP:
1400                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1401                             < 0)
1402                                 goto fail;
1403                         break;
1404                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1405                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1406                                            0) < 0)
1407                                 goto fail;
1408                         break;
1409                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1410                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1411                                            0) < 0)
1412                                 goto fail;
1413                         break;
1414                 default:
1415                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1416                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1417                                            0) < 0)
1418                                 goto fail;
1419                         break;
1420                 }
1421                 break;
1422         case EAP_TYPE_PEAP:
1423         case EAP_TYPE_FAST:
1424                 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1425                                    0) < 0)
1426                         goto fail;
1427                 if (wpa_config_set(ssid, "pac_file",
1428                                    "\"blob://pac_interworking\"", 0) < 0)
1429                         goto fail;
1430                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1431                             eap_get_name(EAP_VENDOR_IETF,
1432                                          eap->inner_method ?
1433                                          eap->inner_method :
1434                                          EAP_TYPE_MSCHAPV2));
1435                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1436                         goto fail;
1437                 break;
1438         case EAP_TYPE_TLS:
1439                 break;
1440         }
1441
1442         if (interworking_set_eap_params(ssid, cred,
1443                                         eap->method == EAP_TYPE_TTLS) < 0)
1444                 goto fail;
1445
1446         nai_realm_free(realm, count);
1447
1448         wpa_s->next_ssid = ssid;
1449         wpa_config_update_prio_list(wpa_s->conf);
1450         interworking_reconnect(wpa_s);
1451
1452         return 0;
1453
1454 fail:
1455         wpas_notify_network_removed(wpa_s, ssid);
1456         wpa_config_remove_network(wpa_s->conf, ssid->id);
1457         nai_realm_free(realm, count);
1458         return -1;
1459 }
1460
1461
1462 static struct wpa_cred * interworking_credentials_available_3gpp(
1463         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1464 {
1465         struct wpa_cred *selected = NULL;
1466 #ifdef INTERWORKING_3GPP
1467         struct wpa_cred *cred;
1468         int ret;
1469
1470         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1471                 return NULL;
1472
1473 #ifdef CONFIG_EAP_PROXY
1474         if (!wpa_s->imsi[0]) {
1475                 size_t len;
1476                 wpa_printf(MSG_DEBUG, "Interworking: IMSI not available - try to read again through eap_proxy");
1477                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1478                                                              wpa_s->imsi,
1479                                                              &len);
1480                 if (wpa_s->mnc_len > 0) {
1481                         wpa_s->imsi[len] = '\0';
1482                         wpa_printf(MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)",
1483                                    wpa_s->imsi, wpa_s->mnc_len);
1484                 } else {
1485                         wpa_printf(MSG_DEBUG, "eap_proxy: IMSI not available");
1486                 }
1487         }
1488 #endif /* CONFIG_EAP_PROXY */
1489
1490         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1491                 char *sep;
1492                 const char *imsi;
1493                 int mnc_len;
1494                 char imsi_buf[16];
1495                 size_t msin_len;
1496
1497 #ifdef PCSC_FUNCS
1498                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1499                     wpa_s->imsi[0]) {
1500                         imsi = wpa_s->imsi;
1501                         mnc_len = wpa_s->mnc_len;
1502                         goto compare;
1503                 }
1504 #endif /* PCSC_FUNCS */
1505 #ifdef CONFIG_EAP_PROXY
1506                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1507                         imsi = wpa_s->imsi;
1508                         mnc_len = wpa_s->mnc_len;
1509                         goto compare;
1510                 }
1511 #endif /* CONFIG_EAP_PROXY */
1512
1513                 if (cred->imsi == NULL || !cred->imsi[0] ||
1514                     (!wpa_s->conf->external_sim &&
1515                      (cred->milenage == NULL || !cred->milenage[0])))
1516                         continue;
1517
1518                 sep = os_strchr(cred->imsi, '-');
1519                 if (sep == NULL ||
1520                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1521                         continue;
1522                 mnc_len = sep - cred->imsi - 3;
1523                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1524                 sep++;
1525                 msin_len = os_strlen(cred->imsi);
1526                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1527                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1528                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1529                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1530                 imsi = imsi_buf;
1531
1532 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1533         compare:
1534 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1535                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1536                            MACSTR, MAC2STR(bss->bssid));
1537                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1538                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1539                 if (ret) {
1540                         if (cred_excluded_ssid(cred, bss))
1541                                 continue;
1542                         if (cred_no_required_oi_match(cred, bss))
1543                                 continue;
1544                         if (selected == NULL ||
1545                             selected->priority < cred->priority)
1546                                 selected = cred;
1547                 }
1548         }
1549 #endif /* INTERWORKING_3GPP */
1550         return selected;
1551 }
1552
1553
1554 static struct wpa_cred * interworking_credentials_available_realm(
1555         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1556 {
1557         struct wpa_cred *cred, *selected = NULL;
1558         struct nai_realm *realm;
1559         u16 count, i;
1560
1561         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1562                 return NULL;
1563
1564         if (wpa_s->conf->cred == NULL)
1565                 return NULL;
1566
1567         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1568                    MACSTR, MAC2STR(bss->bssid));
1569         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1570         if (realm == NULL) {
1571                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1572                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1573                 return NULL;
1574         }
1575
1576         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1577                 if (cred->realm == NULL)
1578                         continue;
1579
1580                 for (i = 0; i < count; i++) {
1581                         if (!nai_realm_match(&realm[i], cred->realm))
1582                                 continue;
1583                         if (nai_realm_find_eap(cred, &realm[i])) {
1584                                 if (cred_excluded_ssid(cred, bss))
1585                                         continue;
1586                                 if (cred_no_required_oi_match(cred, bss))
1587                                         continue;
1588                                 if (selected == NULL ||
1589                                     selected->priority < cred->priority)
1590                                         selected = cred;
1591                                 break;
1592                         }
1593                 }
1594         }
1595
1596         nai_realm_free(realm, count);
1597
1598         return selected;
1599 }
1600
1601
1602 static struct wpa_cred * interworking_credentials_available(
1603         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1604 {
1605         struct wpa_cred *cred, *cred2;
1606
1607         if (disallowed_bssid(wpa_s, bss->bssid) ||
1608             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1609                 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
1610                            MACSTR, MAC2STR(bss->bssid));
1611                 return NULL;
1612         }
1613
1614         cred = interworking_credentials_available_realm(wpa_s, bss);
1615         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1616         if (cred && cred2 && cred2->priority >= cred->priority)
1617                 cred = cred2;
1618         if (!cred)
1619                 cred = cred2;
1620
1621         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1622                                                                       bss);
1623         if (cred && cred2 && cred2->priority >= cred->priority)
1624                 cred = cred2;
1625         if (!cred)
1626                 cred = cred2;
1627
1628         return cred;
1629 }
1630
1631
1632 static int domain_name_list_contains(struct wpabuf *domain_names,
1633                                      const char *domain)
1634 {
1635         const u8 *pos, *end;
1636         size_t len;
1637
1638         len = os_strlen(domain);
1639         pos = wpabuf_head(domain_names);
1640         end = pos + wpabuf_len(domain_names);
1641
1642         while (pos + 1 < end) {
1643                 if (pos + 1 + pos[0] > end)
1644                         break;
1645
1646                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1647                                   pos + 1, pos[0]);
1648                 if (pos[0] == len &&
1649                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1650                         return 1;
1651
1652                 pos += 1 + pos[0];
1653         }
1654
1655         return 0;
1656 }
1657
1658
1659 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
1660                               struct wpa_cred *cred,
1661                               struct wpabuf *domain_names)
1662 {
1663         size_t i;
1664         int ret = -1;
1665 #ifdef INTERWORKING_3GPP
1666         char nai[100], *realm;
1667
1668         char *imsi = NULL;
1669         int mnc_len = 0;
1670         if (cred->imsi)
1671                 imsi = cred->imsi;
1672 #ifdef CONFIG_PCSC
1673         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1674                  wpa_s->scard && wpa_s->imsi[0]) {
1675                 imsi = wpa_s->imsi;
1676                 mnc_len = wpa_s->mnc_len;
1677         }
1678 #endif /* CONFIG_PCSC */
1679 #ifdef CONFIG_EAP_PROXY
1680         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1681                 imsi = wpa_s->imsi;
1682                 mnc_len = wpa_s->mnc_len;
1683         }
1684 #endif /* CONFIG_EAP_PROXY */
1685         if (domain_names &&
1686             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
1687                 realm = os_strchr(nai, '@');
1688                 if (realm)
1689                         realm++;
1690                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1691                            "with SIM/USIM domain %s", realm);
1692                 if (realm &&
1693                     domain_name_list_contains(domain_names, realm))
1694                         return 1;
1695                 if (realm)
1696                         ret = 0;
1697         }
1698 #endif /* INTERWORKING_3GPP */
1699
1700         if (domain_names == NULL || cred->domain == NULL)
1701                 return ret;
1702
1703         for (i = 0; i < cred->num_domain; i++) {
1704                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1705                            "home SP FQDN %s", cred->domain[i]);
1706                 if (domain_name_list_contains(domain_names, cred->domain[i]))
1707                         return 1;
1708         }
1709
1710         return 0;
1711 }
1712
1713
1714 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1715                                 struct wpabuf *domain_names)
1716 {
1717         struct wpa_cred *cred;
1718
1719         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1720                 return -1;
1721
1722         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1723                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
1724                 if (res)
1725                         return res;
1726         }
1727
1728         return 0;
1729 }
1730
1731
1732 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1733 {
1734         struct wpa_bss *bss;
1735         struct wpa_ssid *ssid;
1736
1737         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1738                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1739                         if (wpas_network_disabled(wpa_s, ssid) ||
1740                             ssid->mode != WPAS_MODE_INFRA)
1741                                 continue;
1742                         if (ssid->ssid_len != bss->ssid_len ||
1743                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1744                             0)
1745                                 continue;
1746                         /*
1747                          * TODO: Consider more accurate matching of security
1748                          * configuration similarly to what is done in events.c
1749                          */
1750                         return 1;
1751                 }
1752         }
1753
1754         return 0;
1755 }
1756
1757
1758 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1759 {
1760         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1761         int selected_prio = -999999, selected_home_prio = -999999;
1762         unsigned int count = 0;
1763         const char *type;
1764         int res;
1765         struct wpa_cred *cred;
1766
1767         wpa_s->network_select = 0;
1768
1769         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1770                 cred = interworking_credentials_available(wpa_s, bss);
1771                 if (!cred)
1772                         continue;
1773                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1774                         /*
1775                          * We currently support only HS 2.0 networks and those
1776                          * are required to use WPA2-Enterprise.
1777                          */
1778                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1779                                    "with " MACSTR " but network does not use "
1780                                    "RSN", MAC2STR(bss->bssid));
1781                         continue;
1782                 }
1783                 count++;
1784                 res = interworking_home_sp(wpa_s, bss->anqp ?
1785                                            bss->anqp->domain_name : NULL);
1786                 if (res > 0)
1787                         type = "home";
1788                 else if (res == 0)
1789                         type = "roaming";
1790                 else
1791                         type = "unknown";
1792                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1793                         MAC2STR(bss->bssid), type);
1794                 if (wpa_s->auto_select ||
1795                     (wpa_s->conf->auto_interworking &&
1796                      wpa_s->auto_network_select)) {
1797                         if (selected == NULL ||
1798                             cred->priority > selected_prio) {
1799                                 selected = bss;
1800                                 selected_prio = cred->priority;
1801                         }
1802                         if (res > 0 &&
1803                             (selected_home == NULL ||
1804                              cred->priority > selected_home_prio)) {
1805                                 selected_home = bss;
1806                                 selected_home_prio = cred->priority;
1807                         }
1808                 }
1809         }
1810
1811         if (selected_home && selected_home != selected &&
1812             selected_home_prio >= selected_prio) {
1813                 /* Prefer network operated by the Home SP */
1814                 selected = selected_home;
1815         }
1816
1817         if (count == 0) {
1818                 /*
1819                  * No matching network was found based on configured
1820                  * credentials. Check whether any of the enabled network blocks
1821                  * have matching APs.
1822                  */
1823                 if (interworking_find_network_match(wpa_s)) {
1824                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1825                                    "match for enabled network configurations");
1826                         if (wpa_s->auto_select)
1827                                 interworking_reconnect(wpa_s);
1828                         return;
1829                 }
1830
1831                 if (wpa_s->auto_network_select) {
1832                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1833                                    "scanning after ANQP fetch");
1834                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1835                                                 0);
1836                         return;
1837                 }
1838
1839                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1840                         "with matching credentials found");
1841         }
1842
1843         if (selected)
1844                 interworking_connect(wpa_s, selected);
1845 }
1846
1847
1848 static struct wpa_bss_anqp *
1849 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1850 {
1851         struct wpa_bss *other;
1852
1853         if (is_zero_ether_addr(bss->hessid))
1854                 return NULL; /* Cannot be in the same homegenous ESS */
1855
1856         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1857                 if (other == bss)
1858                         continue;
1859                 if (other->anqp == NULL)
1860                         continue;
1861                 if (other->anqp->roaming_consortium == NULL &&
1862                     other->anqp->nai_realm == NULL &&
1863                     other->anqp->anqp_3gpp == NULL &&
1864                     other->anqp->domain_name == NULL)
1865                         continue;
1866                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1867                         continue;
1868                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1869                         continue;
1870                 if (bss->ssid_len != other->ssid_len ||
1871                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1872                         continue;
1873
1874                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1875                            "already fetched BSSID " MACSTR " and " MACSTR,
1876                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1877                 other->anqp->users++;
1878                 return other->anqp;
1879         }
1880
1881         return NULL;
1882 }
1883
1884
1885 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1886 {
1887         struct wpa_bss *bss;
1888         int found = 0;
1889         const u8 *ie;
1890
1891         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress)
1892                 return;
1893
1894         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1895                 if (!(bss->caps & IEEE80211_CAP_ESS))
1896                         continue;
1897                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1898                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1899                         continue; /* AP does not support Interworking */
1900                 if (disallowed_bssid(wpa_s, bss->bssid) ||
1901                     disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
1902                         continue; /* Disallowed BSS */
1903
1904                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1905                         if (bss->anqp == NULL) {
1906                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1907                                                                          bss);
1908                                 if (bss->anqp) {
1909                                         /* Shared data already fetched */
1910                                         continue;
1911                                 }
1912                                 bss->anqp = wpa_bss_anqp_alloc();
1913                                 if (bss->anqp == NULL)
1914                                         break;
1915                         }
1916                         found++;
1917                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1918                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1919                                 MACSTR, MAC2STR(bss->bssid));
1920                         interworking_anqp_send_req(wpa_s, bss);
1921                         break;
1922                 }
1923         }
1924
1925         if (found == 0) {
1926                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1927                 wpa_s->fetch_anqp_in_progress = 0;
1928                 if (wpa_s->network_select)
1929                         interworking_select_network(wpa_s);
1930         }
1931 }
1932
1933
1934 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1935 {
1936         struct wpa_bss *bss;
1937
1938         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1939                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1940
1941         wpa_s->fetch_anqp_in_progress = 1;
1942         interworking_next_anqp_fetch(wpa_s);
1943 }
1944
1945
1946 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1947 {
1948         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1949                 return 0;
1950
1951         wpa_s->network_select = 0;
1952         wpa_s->fetch_all_anqp = 1;
1953
1954         interworking_start_fetch_anqp(wpa_s);
1955
1956         return 0;
1957 }
1958
1959
1960 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1961 {
1962         if (!wpa_s->fetch_anqp_in_progress)
1963                 return;
1964
1965         wpa_s->fetch_anqp_in_progress = 0;
1966 }
1967
1968
1969 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1970                   u16 info_ids[], size_t num_ids)
1971 {
1972         struct wpabuf *buf;
1973         int ret = 0;
1974         int freq;
1975         struct wpa_bss *bss;
1976         int res;
1977
1978         freq = wpa_s->assoc_freq;
1979         bss = wpa_bss_get_bssid(wpa_s, dst);
1980         if (bss) {
1981                 wpa_bss_anqp_unshare_alloc(bss);
1982                 freq = bss->freq;
1983         }
1984         if (freq <= 0)
1985                 return -1;
1986
1987         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1988                    MAC2STR(dst), (unsigned int) num_ids);
1989
1990         buf = anqp_build_req(info_ids, num_ids, NULL);
1991         if (buf == NULL)
1992                 return -1;
1993
1994         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1995         if (res < 0) {
1996                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1997                 wpabuf_free(buf);
1998                 ret = -1;
1999         } else
2000                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
2001                            "%u", res);
2002
2003         return ret;
2004 }
2005
2006
2007 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2008                                             struct wpa_bss *bss, const u8 *sa,
2009                                             u16 info_id,
2010                                             const u8 *data, size_t slen)
2011 {
2012         const u8 *pos = data;
2013         struct wpa_bss_anqp *anqp = NULL;
2014 #ifdef CONFIG_HS20
2015         u8 type;
2016 #endif /* CONFIG_HS20 */
2017
2018         if (bss)
2019                 anqp = bss->anqp;
2020
2021         switch (info_id) {
2022         case ANQP_CAPABILITY_LIST:
2023                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2024                         " ANQP Capability list", MAC2STR(sa));
2025                 break;
2026         case ANQP_VENUE_NAME:
2027                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2028                         " Venue Name", MAC2STR(sa));
2029                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2030                 if (anqp) {
2031                         wpabuf_free(anqp->venue_name);
2032                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2033                 }
2034                 break;
2035         case ANQP_NETWORK_AUTH_TYPE:
2036                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2037                         " Network Authentication Type information",
2038                         MAC2STR(sa));
2039                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2040                                   "Type", pos, slen);
2041                 if (anqp) {
2042                         wpabuf_free(anqp->network_auth_type);
2043                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2044                 }
2045                 break;
2046         case ANQP_ROAMING_CONSORTIUM:
2047                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2048                         " Roaming Consortium list", MAC2STR(sa));
2049                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2050                                   pos, slen);
2051                 if (anqp) {
2052                         wpabuf_free(anqp->roaming_consortium);
2053                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2054                 }
2055                 break;
2056         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2057                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2058                         " IP Address Type Availability information",
2059                         MAC2STR(sa));
2060                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2061                             pos, slen);
2062                 if (anqp) {
2063                         wpabuf_free(anqp->ip_addr_type_availability);
2064                         anqp->ip_addr_type_availability =
2065                                 wpabuf_alloc_copy(pos, slen);
2066                 }
2067                 break;
2068         case ANQP_NAI_REALM:
2069                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2070                         " NAI Realm list", MAC2STR(sa));
2071                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2072                 if (anqp) {
2073                         wpabuf_free(anqp->nai_realm);
2074                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2075                 }
2076                 break;
2077         case ANQP_3GPP_CELLULAR_NETWORK:
2078                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2079                         " 3GPP Cellular Network information", MAC2STR(sa));
2080                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2081                                   pos, slen);
2082                 if (anqp) {
2083                         wpabuf_free(anqp->anqp_3gpp);
2084                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2085                 }
2086                 break;
2087         case ANQP_DOMAIN_NAME:
2088                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2089                         " Domain Name list", MAC2STR(sa));
2090                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2091                 if (anqp) {
2092                         wpabuf_free(anqp->domain_name);
2093                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2094                 }
2095                 break;
2096         case ANQP_VENDOR_SPECIFIC:
2097                 if (slen < 3)
2098                         return;
2099
2100                 switch (WPA_GET_BE24(pos)) {
2101 #ifdef CONFIG_HS20
2102                 case OUI_WFA:
2103                         pos += 3;
2104                         slen -= 3;
2105
2106                         if (slen < 1)
2107                                 return;
2108                         type = *pos++;
2109                         slen--;
2110
2111                         switch (type) {
2112                         case HS20_ANQP_OUI_TYPE:
2113                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
2114                                                              slen);
2115                                 break;
2116                         default:
2117                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
2118                                            "vendor type %u", type);
2119                                 break;
2120                         }
2121                         break;
2122 #endif /* CONFIG_HS20 */
2123                 default:
2124                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
2125                                    "vendor-specific ANQP OUI %06x",
2126                                    WPA_GET_BE24(pos));
2127                         return;
2128                 }
2129                 break;
2130         default:
2131                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
2132                            "%u", info_id);
2133                 break;
2134         }
2135 }
2136
2137
2138 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2139                   enum gas_query_result result,
2140                   const struct wpabuf *adv_proto,
2141                   const struct wpabuf *resp, u16 status_code)
2142 {
2143         struct wpa_supplicant *wpa_s = ctx;
2144         const u8 *pos;
2145         const u8 *end;
2146         u16 info_id;
2147         u16 slen;
2148         struct wpa_bss *bss = NULL, *tmp;
2149
2150         if (result != GAS_QUERY_SUCCESS)
2151                 return;
2152
2153         pos = wpabuf_head(adv_proto);
2154         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2155             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2156                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
2157                            "Protocol in response");
2158                 return;
2159         }
2160
2161         /*
2162          * If possible, select the BSS entry based on which BSS entry was used
2163          * for the request. This can help in cases where multiple BSS entries
2164          * may exist for the same AP.
2165          */
2166         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2167                 if (tmp == wpa_s->interworking_gas_bss &&
2168                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2169                         bss = tmp;
2170                         break;
2171                 }
2172         }
2173         if (bss == NULL)
2174                 bss = wpa_bss_get_bssid(wpa_s, dst);
2175
2176         pos = wpabuf_head(resp);
2177         end = pos + wpabuf_len(resp);
2178
2179         while (pos < end) {
2180                 if (pos + 4 > end) {
2181                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
2182                         break;
2183                 }
2184                 info_id = WPA_GET_LE16(pos);
2185                 pos += 2;
2186                 slen = WPA_GET_LE16(pos);
2187                 pos += 2;
2188                 if (pos + slen > end) {
2189                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
2190                                    "for Info ID %u", info_id);
2191                         break;
2192                 }
2193                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2194                                                 slen);
2195                 pos += slen;
2196         }
2197 }
2198
2199
2200 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2201                                           struct wpa_scan_results *scan_res)
2202 {
2203         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2204                    "ANQP fetch");
2205         interworking_start_fetch_anqp(wpa_s);
2206 }
2207
2208
2209 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
2210                         int *freqs)
2211 {
2212         interworking_stop_fetch_anqp(wpa_s);
2213         wpa_s->network_select = 1;
2214         wpa_s->auto_network_select = 0;
2215         wpa_s->auto_select = !!auto_select;
2216         wpa_s->fetch_all_anqp = 0;
2217         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2218                    "selection");
2219         wpa_s->scan_res_handler = interworking_scan_res_handler;
2220         wpa_s->normal_scans = 0;
2221         wpa_s->scan_req = MANUAL_SCAN_REQ;
2222         os_free(wpa_s->manual_scan_freqs);
2223         wpa_s->manual_scan_freqs = freqs;
2224         wpa_s->after_wps = 0;
2225         wpa_s->known_wps_freq = 0;
2226         wpa_supplicant_req_scan(wpa_s, 0, 0);
2227
2228         return 0;
2229 }
2230
2231
2232 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2233                         enum gas_query_result result,
2234                         const struct wpabuf *adv_proto,
2235                         const struct wpabuf *resp, u16 status_code)
2236 {
2237         struct wpa_supplicant *wpa_s = ctx;
2238         struct wpabuf *n;
2239
2240         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2241                 " dialog_token=%d status_code=%d resp_len=%d",
2242                 MAC2STR(addr), dialog_token, status_code,
2243                 resp ? (int) wpabuf_len(resp) : -1);
2244         if (!resp)
2245                 return;
2246
2247         n = wpabuf_dup(resp);
2248         if (n == NULL)
2249                 return;
2250         wpabuf_free(wpa_s->prev_gas_resp);
2251         wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
2252         os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
2253         wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
2254         wpa_s->last_gas_resp = n;
2255         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2256         wpa_s->last_gas_dialog_token = dialog_token;
2257 }
2258
2259
2260 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2261                      const struct wpabuf *adv_proto,
2262                      const struct wpabuf *query)
2263 {
2264         struct wpabuf *buf;
2265         int ret = 0;
2266         int freq;
2267         struct wpa_bss *bss;
2268         int res;
2269         size_t len;
2270         u8 query_resp_len_limit = 0, pame_bi = 0;
2271
2272         freq = wpa_s->assoc_freq;
2273         bss = wpa_bss_get_bssid(wpa_s, dst);
2274         if (bss)
2275                 freq = bss->freq;
2276         if (freq <= 0)
2277                 return -1;
2278
2279         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2280                    MAC2STR(dst), freq);
2281         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2282         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2283
2284         len = 3 + wpabuf_len(adv_proto) + 2;
2285         if (query)
2286                 len += wpabuf_len(query);
2287         buf = gas_build_initial_req(0, len);
2288         if (buf == NULL)
2289                 return -1;
2290
2291         /* Advertisement Protocol IE */
2292         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2293         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2294         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2295                       (pame_bi ? 0x80 : 0));
2296         wpabuf_put_buf(buf, adv_proto);
2297
2298         /* GAS Query */
2299         if (query) {
2300                 wpabuf_put_le16(buf, wpabuf_len(query));
2301                 wpabuf_put_buf(buf, query);
2302         } else
2303                 wpabuf_put_le16(buf, 0);
2304
2305         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2306         if (res < 0) {
2307                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2308                 wpabuf_free(buf);
2309                 ret = -1;
2310         } else
2311                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2312                            "%u", res);
2313
2314         return ret;
2315 }