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 "driver_i.h"
  31 #include "gas_query.h"
  32 #include "hs20_supplicant.h"
  33 #include "interworking.h"
  34
  35
  36 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  37 #define INTERWORKING_3GPP
  38 #else
  39 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  40 #define INTERWORKING_3GPP
  41 #else
  42 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  43 #define INTERWORKING_3GPP
  44 #endif
  45 #endif
  46 #endif
  47
  48 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  49 static struct wpa_cred * interworking_credentials_available_realm(
  50         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
  51         int *excluded);
  52 static struct wpa_cred * interworking_credentials_available_3gpp(
  53         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
  54         int *excluded);
  55
  56
  57 static int cred_prio_cmp(const struct wpa_cred *a, const struct wpa_cred *b)
  58 {
  59         if (a->priority > b->priority)
  60                 return 1;
  61         if (a->priority < b->priority)
  62                 return -1;
  63         if (a->provisioning_sp == NULL || b->provisioning_sp == NULL ||
  64             os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0)
  65                 return 0;
  66         if (a->sp_priority < b->sp_priority)
  67                 return 1;
  68         if (a->sp_priority > b->sp_priority)
  69                 return -1;
  70         return 0;
  71 }
  72
  73
  74 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  75 {
  76         unsigned int tried;
  77
  78         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  79                 wpa_supplicant_cancel_sched_scan(wpa_s);
  80                 wpa_s->own_disconnect_req = 1;
  81                 wpa_supplicant_deauthenticate(wpa_s,
  82                                               WLAN_REASON_DEAUTH_LEAVING);
  83         }
  84         wpa_s->disconnected = 0;
  85         wpa_s->reassociate = 1;
  86         tried = wpa_s->interworking_fast_assoc_tried;
  87         wpa_s->interworking_fast_assoc_tried = 1;
  88
  89         if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0)
  90                 return;
  91
  92         wpa_s->interworking_fast_assoc_tried = 0;
  93         wpa_supplicant_req_scan(wpa_s, 0, 0);
  94 }
  95
  96
  97 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  98                                       struct wpabuf *extra)
  99 {
 100         struct wpabuf *buf;
 101         size_t i;
 102         u8 *len_pos;
 103
 104         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
 105                                          (extra ? wpabuf_len(extra) : 0));
 106         if (buf == NULL)
 107                 return NULL;
 108
 109         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
 110         for (i = 0; i < num_ids; i++)
 111                 wpabuf_put_le16(buf, info_ids[i]);
 112         gas_anqp_set_element_len(buf, len_pos);
 113         if (extra)
 114                 wpabuf_put_buf(buf, extra);
 115
 116         gas_anqp_set_len(buf);
 117
 118         return buf;
 119 }
 120
 121
 122 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
 123                                       u8 dialog_token,
 124                                       enum gas_query_result result,
 125                                       const struct wpabuf *adv_proto,
 126                                       const struct wpabuf *resp,
 127                                       u16 status_code)
 128 {
 129         struct wpa_supplicant *wpa_s = ctx;
 130
 131         wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
 132                    " dialog_token=%u result=%d status_code=%u",
 133                    MAC2STR(dst), dialog_token, result, status_code);
 134         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 135                      status_code);
 136         interworking_next_anqp_fetch(wpa_s);
 137 }
 138
 139
 140 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 141 {
 142         struct wpa_cred *cred;
 143
 144         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 145                 if (cred->roaming_consortium_len)
 146                         return 1;
 147                 if (cred->required_roaming_consortium_len)
 148                         return 1;
 149         }
 150         return 0;
 151 }
 152
 153
 154 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 155 {
 156         struct wpa_cred *cred;
 157
 158         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 159                 if (cred->pcsc || cred->imsi)
 160                         return 1;
 161         }
 162         return 0;
 163 }
 164
 165
 166 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 167 {
 168         struct wpa_cred *cred;
 169
 170         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 171                 if (cred->pcsc || cred->imsi)
 172                         continue;
 173                 if (!cred->eap_method)
 174                         return 1;
 175                 if (cred->realm && cred->roaming_consortium_len == 0)
 176                         return 1;
 177         }
 178         return 0;
 179 }
 180
 181
 182 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 183 {
 184         struct wpa_cred *cred;
 185
 186         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 187                 if (cred->domain || cred->pcsc || cred->imsi ||
 188                     cred->roaming_partner)
 189                         return 1;
 190         }
 191         return 0;
 192 }
 193
 194
 195 #ifdef CONFIG_HS20
 196
 197 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
 198 {
 199         struct wpa_cred *cred;
 200
 201         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 202                 if (cred->min_dl_bandwidth_home ||
 203                     cred->min_ul_bandwidth_home ||
 204                     cred->min_dl_bandwidth_roaming ||
 205                     cred->min_ul_bandwidth_roaming)
 206                         return 1;
 207         }
 208         return 0;
 209 }
 210
 211
 212 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
 213 {
 214         struct wpa_cred *cred;
 215
 216         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 217                 if (cred->num_req_conn_capab)
 218                         return 1;
 219         }
 220         return 0;
 221 }
 222
 223 #endif /* CONFIG_HS20 */
 224
 225
 226 static int additional_roaming_consortiums(struct wpa_bss *bss)
 227 {
 228         const u8 *ie;
 229         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 230         if (ie == NULL || ie[1] == 0)
 231                 return 0;
 232         return ie[2]; /* Number of ANQP OIs */
 233 }
 234
 235
 236 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 237 {
 238         struct wpa_supplicant *wpa_s = eloop_ctx;
 239         interworking_next_anqp_fetch(wpa_s);
 240 }
 241
 242
 243 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 244                                       struct wpa_bss *bss)
 245 {
 246         struct wpabuf *buf;
 247         int ret = 0;
 248         int res;
 249         u16 info_ids[8];
 250         size_t num_info_ids = 0;
 251         struct wpabuf *extra = NULL;
 252         int all = wpa_s->fetch_all_anqp;
 253
 254         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 255                 MAC2STR(bss->bssid));
 256         wpa_s->interworking_gas_bss = bss;
 257
 258         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 259         if (all) {
 260                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 261                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 262         }
 263         if (all || (cred_with_roaming_consortium(wpa_s) &&
 264                     additional_roaming_consortiums(bss)))
 265                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 266         if (all)
 267                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 268         if (all || cred_with_nai_realm(wpa_s))
 269                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 270         if (all || cred_with_3gpp(wpa_s)) {
 271                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 272                 wpa_supplicant_scard_init(wpa_s, NULL);
 273         }
 274         if (all || cred_with_domain(wpa_s))
 275                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 276         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 277                     (u8 *) info_ids, num_info_ids * 2);
 278
 279 #ifdef CONFIG_HS20
 280         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 281                 u8 *len_pos;
 282
 283                 extra = wpabuf_alloc(100);
 284                 if (!extra)
 285                         return -1;
 286
 287                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 288                 wpabuf_put_be24(extra, OUI_WFA);
 289                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 290                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 291                 wpabuf_put_u8(extra, 0); /* Reserved */
 292                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 293                 if (all)
 294                         wpabuf_put_u8(extra,
 295                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 296                 if (all || cred_with_min_backhaul(wpa_s))
 297                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 298                 if (all || cred_with_conn_capab(wpa_s))
 299                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 300                 if (all)
 301                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 302                 if (all)
 303                         wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
 304                 gas_anqp_set_element_len(extra, len_pos);
 305         }
 306 #endif /* CONFIG_HS20 */
 307
 308         buf = anqp_build_req(info_ids, num_info_ids, extra);
 309         wpabuf_free(extra);
 310         if (buf == NULL)
 311                 return -1;
 312
 313         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 314                             interworking_anqp_resp_cb, wpa_s);
 315         if (res < 0) {
 316                 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
 317                 wpabuf_free(buf);
 318                 ret = -1;
 319                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 320                                        NULL);
 321         } else
 322                 wpa_msg(wpa_s, MSG_DEBUG,
 323                         "ANQP: Query started with dialog token %u", res);
 324
 325         return ret;
 326 }
 327
 328
 329 struct nai_realm_eap {
 330         u8 method;
 331         u8 inner_method;
 332         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 333         u8 cred_type;
 334         u8 tunneled_cred_type;
 335 };
 336
 337 struct nai_realm {
 338         u8 encoding;
 339         char *realm;
 340         u8 eap_count;
 341         struct nai_realm_eap *eap;
 342 };
 343
 344
 345 static void nai_realm_free(struct nai_realm *realms, u16 count)
 346 {
 347         u16 i;
 348
 349         if (realms == NULL)
 350                 return;
 351         for (i = 0; i < count; i++) {
 352                 os_free(realms[i].eap);
 353                 os_free(realms[i].realm);
 354         }
 355         os_free(realms);
 356 }
 357
 358
 359 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 360                                       const u8 *end)
 361 {
 362         u8 elen, auth_count, a;
 363         const u8 *e_end;
 364
 365         if (end - pos < 3) {
 366                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 367                 return NULL;
 368         }
 369
 370         elen = *pos++;
 371         if (elen > end - pos || elen < 2) {
 372                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 373                 return NULL;
 374         }
 375         e_end = pos + elen;
 376         e->method = *pos++;
 377         auth_count = *pos++;
 378         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 379                    elen, e->method, auth_count);
 380
 381         for (a = 0; a < auth_count; a++) {
 382                 u8 id, len;
 383
 384                 if (end - pos < 2) {
 385                         wpa_printf(MSG_DEBUG,
 386                                    "No room for Authentication Parameter subfield header");
 387                         return NULL;
 388                 }
 389
 390                 id = *pos++;
 391                 len = *pos++;
 392                 if (len > end - pos) {
 393                         wpa_printf(MSG_DEBUG,
 394                                    "No room for Authentication Parameter subfield");
 395                         return NULL;
 396                 }
 397
 398                 switch (id) {
 399                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 400                         if (len < 1)
 401                                 break;
 402                         e->inner_non_eap = *pos;
 403                         if (e->method != EAP_TYPE_TTLS)
 404                                 break;
 405                         switch (*pos) {
 406                         case NAI_REALM_INNER_NON_EAP_PAP:
 407                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 408                                 break;
 409                         case NAI_REALM_INNER_NON_EAP_CHAP:
 410                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 411                                 break;
 412                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 413                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 414                                 break;
 415                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 416                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 417                                 break;
 418                         }
 419                         break;
 420                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 421                         if (len < 1)
 422                                 break;
 423                         e->inner_method = *pos;
 424                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 425                                    e->inner_method);
 426                         break;
 427                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 428                         if (len < 1)
 429                                 break;
 430                         e->cred_type = *pos;
 431                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 432                                    e->cred_type);
 433                         break;
 434                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 435                         if (len < 1)
 436                                 break;
 437                         e->tunneled_cred_type = *pos;
 438                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 439                                    "Type: %u", e->tunneled_cred_type);
 440                         break;
 441                 default:
 442                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 443                                    "Parameter: id=%u len=%u", id, len);
 444                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 445                                     "Value", pos, len);
 446                         break;
 447                 }
 448
 449                 pos += len;
 450         }
 451
 452         return e_end;
 453 }
 454
 455
 456 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 457                                         const u8 *end)
 458 {
 459         u16 len;
 460         const u8 *f_end;
 461         u8 realm_len, e;
 462
 463         if (end - pos < 4) {
 464                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 465                            "fixed fields");
 466                 return NULL;
 467         }
 468
 469         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 470         pos += 2;
 471         if (len > end - pos || len < 3) {
 472                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 473                            "(len=%u; left=%u)",
 474                            len, (unsigned int) (end - pos));
 475                 return NULL;
 476         }
 477         f_end = pos + len;
 478
 479         r->encoding = *pos++;
 480         realm_len = *pos++;
 481         if (realm_len > f_end - pos) {
 482                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 483                            "(len=%u; left=%u)",
 484                            realm_len, (unsigned int) (f_end - pos));
 485                 return NULL;
 486         }
 487         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 488         r->realm = dup_binstr(pos, realm_len);
 489         if (r->realm == NULL)
 490                 return NULL;
 491         pos += realm_len;
 492
 493         if (f_end - pos < 1) {
 494                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 495                 return NULL;
 496         }
 497         r->eap_count = *pos++;
 498         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 499         if (r->eap_count * 3 > f_end - pos) {
 500                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 501                 return NULL;
 502         }
 503         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 504         if (r->eap == NULL)
 505                 return NULL;
 506
 507         for (e = 0; e < r->eap_count; e++) {
 508                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 509                 if (pos == NULL)
 510                         return NULL;
 511         }
 512
 513         return f_end;
 514 }
 515
 516
 517 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 518 {
 519         struct nai_realm *realm;
 520         const u8 *pos, *end;
 521         u16 i, num;
 522         size_t left;
 523
 524         if (anqp == NULL)
 525                 return NULL;
 526         left = wpabuf_len(anqp);
 527         if (left < 2)
 528                 return NULL;
 529
 530         pos = wpabuf_head_u8(anqp);
 531         end = pos + left;
 532         num = WPA_GET_LE16(pos);
 533         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 534         pos += 2;
 535         left -= 2;
 536
 537         if (num > left / 5) {
 538                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 539                            "enough data (%u octets) for that many realms",
 540                            num, (unsigned int) left);
 541                 return NULL;
 542         }
 543
 544         realm = os_calloc(num, sizeof(struct nai_realm));
 545         if (realm == NULL)
 546                 return NULL;
 547
 548         for (i = 0; i < num; i++) {
 549                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 550                 if (pos == NULL) {
 551                         nai_realm_free(realm, num);
 552                         return NULL;
 553                 }
 554         }
 555
 556         *count = num;
 557         return realm;
 558 }
 559
 560
 561 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 562 {
 563         char *tmp, *pos, *end;
 564         int match = 0;
 565
 566         if (realm->realm == NULL || home_realm == NULL)
 567                 return 0;
 568
 569         if (os_strchr(realm->realm, ';') == NULL)
 570                 return os_strcasecmp(realm->realm, home_realm) == 0;
 571
 572         tmp = os_strdup(realm->realm);
 573         if (tmp == NULL)
 574                 return 0;
 575
 576         pos = tmp;
 577         while (*pos) {
 578                 end = os_strchr(pos, ';');
 579                 if (end)
 580                         *end = '\0';
 581                 if (os_strcasecmp(pos, home_realm) == 0) {
 582                         match = 1;
 583                         break;
 584                 }
 585                 if (end == NULL)
 586                         break;
 587                 pos = end + 1;
 588         }
 589
 590         os_free(tmp);
 591
 592         return match;
 593 }
 594
 595
 596 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
 597                                    struct nai_realm_eap *eap)
 598 {
 599         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
 600                 wpa_msg(wpa_s, MSG_DEBUG,
 601                         "nai-realm-cred-username: EAP method not supported: %d",
 602                         eap->method);
 603                 return 0; /* method not supported */
 604         }
 605
 606         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
 607             eap->method != EAP_TYPE_FAST) {
 608                 /* Only tunneled methods with username/password supported */
 609                 wpa_msg(wpa_s, MSG_DEBUG,
 610                         "nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
 611                         eap->method);
 612                 return 0;
 613         }
 614
 615         if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
 616                 if (eap->inner_method &&
 617                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
 618                         wpa_msg(wpa_s, MSG_DEBUG,
 619                                 "nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
 620                                 eap->inner_method);
 621                         return 0;
 622                 }
 623                 if (!eap->inner_method &&
 624                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
 625                         wpa_msg(wpa_s, MSG_DEBUG,
 626                                 "nai-realm-cred-username: MSCHAPv2 not supported");
 627                         return 0;
 628                 }
 629         }
 630
 631         if (eap->method == EAP_TYPE_TTLS) {
 632                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 633                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 634                 if (eap->inner_method &&
 635                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
 636                         wpa_msg(wpa_s, MSG_DEBUG,
 637                                 "nai-realm-cred-username: TTLS, but inner not supported: %d",
 638                                 eap->inner_method);
 639                         return 0;
 640                 }
 641                 if (eap->inner_non_eap &&
 642                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 643                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 644                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 645                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
 646                         wpa_msg(wpa_s, MSG_DEBUG,
 647                                 "nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
 648                                 eap->inner_non_eap);
 649                         return 0;
 650                 }
 651         }
 652
 653         if (eap->inner_method &&
 654             eap->inner_method != EAP_TYPE_GTC &&
 655             eap->inner_method != EAP_TYPE_MSCHAPV2) {
 656                 wpa_msg(wpa_s, MSG_DEBUG,
 657                         "nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
 658                         eap->inner_method);
 659                 return 0;
 660         }
 661
 662         return 1;
 663 }
 664
 665
 666 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
 667                                struct nai_realm_eap *eap)
 668 {
 669         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
 670                 wpa_msg(wpa_s, MSG_DEBUG,
 671                         "nai-realm-cred-cert: Method not supported: %d",
 672                         eap->method);
 673                 return 0; /* method not supported */
 674         }
 675
 676         if (eap->method != EAP_TYPE_TLS) {
 677                 /* Only EAP-TLS supported for credential authentication */
 678                 wpa_msg(wpa_s, MSG_DEBUG,
 679                         "nai-realm-cred-cert: Method not TLS: %d",
 680                         eap->method);
 681                 return 0;
 682         }
 683
 684         return 1;
 685 }
 686
 687
 688 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
 689                                                  struct wpa_cred *cred,
 690                                                  struct nai_realm *realm)
 691 {
 692         u8 e;
 693
 694         if (cred->username == NULL ||
 695             cred->username[0] == '\0' ||
 696             ((cred->password == NULL ||
 697               cred->password[0] == '\0') &&
 698              (cred->private_key == NULL ||
 699               cred->private_key[0] == '\0'))) {
 700                 wpa_msg(wpa_s, MSG_DEBUG,
 701                         "nai-realm-find-eap: incomplete cred info: username: %s  password: %s private_key: %s",
 702                         cred->username ? cred->username : "NULL",
 703                         cred->password ? cred->password : "NULL",
 704                         cred->private_key ? cred->private_key : "NULL");
 705                 return NULL;
 706         }
 707
 708         for (e = 0; e < realm->eap_count; e++) {
 709                 struct nai_realm_eap *eap = &realm->eap[e];
 710                 if (cred->password && cred->password[0] &&
 711                     nai_realm_cred_username(wpa_s, eap))
 712                         return eap;
 713                 if (cred->private_key && cred->private_key[0] &&
 714                     nai_realm_cred_cert(wpa_s, eap))
 715                         return eap;
 716         }
 717
 718         return NULL;
 719 }
 720
 721
 722 #ifdef INTERWORKING_3GPP
 723
 724 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 725 {
 726         u8 plmn[3], plmn2[3];
 727         const u8 *pos, *end;
 728         u8 udhl;
 729
 730         /*
 731          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 732          * operator is allowed to include only two digits of the MNC, so allow
 733          * matches based on both two and three digit MNC assumptions. Since some
 734          * SIM/USIM cards may not expose MNC length conveniently, we may be
 735          * provided the default MNC length 3 here and as such, checking with MNC
 736          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 737          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 738          * with otherwise matching values would not be good idea in general, so
 739          * this should not result in selecting incorrect networks.
 740          */
 741         /* Match with 3 digit MNC */
 742         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 743         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 744         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 745         /* Match with 2 digit MNC */
 746         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 747         plmn2[1] = (imsi[2] - '0') | 0xf0;
 748         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 749
 750         if (anqp == NULL)
 751                 return 0;
 752         pos = wpabuf_head_u8(anqp);
 753         end = pos + wpabuf_len(anqp);
 754         if (end - pos < 2)
 755                 return 0;
 756         if (*pos != 0) {
 757                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 758                 return 0;
 759         }
 760         pos++;
 761         udhl = *pos++;
 762         if (udhl > end - pos) {
 763                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 764                 return 0;
 765         }
 766         end = pos + udhl;
 767
 768         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 769                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 770                    imsi, mnc_len);
 771
 772         while (end - pos >= 2) {
 773                 u8 iei, len;
 774                 const u8 *l_end;
 775                 iei = *pos++;
 776                 len = *pos++ & 0x7f;
 777                 if (len > end - pos)
 778                         break;
 779                 l_end = pos + len;
 780
 781                 if (iei == 0 && len > 0) {
 782                         /* PLMN List */
 783                         u8 num, i;
 784                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 785                                     pos, len);
 786                         num = *pos++;
 787                         for (i = 0; i < num; i++) {
 788                                 if (l_end - pos < 3)
 789                                         break;
 790                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 791                                     os_memcmp(pos, plmn2, 3) == 0)
 792                                         return 1; /* Found matching PLMN */
 793                                 pos += 3;
 794                         }
 795                 } else {
 796                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 797                                     pos, len);
 798                 }
 799
 800                 pos = l_end;
 801         }
 802
 803         return 0;
 804 }
 805
 806
 807 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 808                           size_t mnc_len, char prefix)
 809 {
 810         const char *sep, *msin;
 811         char *end, *pos;
 812         size_t msin_len, plmn_len;
 813
 814         /*
 815          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 816          * Root NAI:
 817          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 818          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 819          */
 820
 821         if (imsi == NULL || os_strlen(imsi) > 16) {
 822                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 823                 return -1;
 824         }
 825         sep = os_strchr(imsi, '-');
 826         if (sep) {
 827                 plmn_len = sep - imsi;
 828                 msin = sep + 1;
 829         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 830                 plmn_len = 3 + mnc_len;
 831                 msin = imsi + plmn_len;
 832         } else
 833                 return -1;
 834         if (plmn_len != 5 && plmn_len != 6)
 835                 return -1;
 836         msin_len = os_strlen(msin);
 837
 838         pos = nai;
 839         end = nai + nai_len;
 840         if (prefix)
 841                 *pos++ = prefix;
 842         os_memcpy(pos, imsi, plmn_len);
 843         pos += plmn_len;
 844         os_memcpy(pos, msin, msin_len);
 845         pos += msin_len;
 846         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 847         if (plmn_len == 5) {
 848                 *pos++ = '0';
 849                 *pos++ = imsi[3];
 850                 *pos++ = imsi[4];
 851         } else {
 852                 *pos++ = imsi[3];
 853                 *pos++ = imsi[4];
 854                 *pos++ = imsi[5];
 855         }
 856         os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 857                     imsi[0], imsi[1], imsi[2]);
 858
 859         return 0;
 860 }
 861
 862
 863 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 864 {
 865         char nai[100];
 866         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 867                 return -1;
 868         return wpa_config_set_quoted(ssid, "identity", nai);
 869 }
 870
 871 #endif /* INTERWORKING_3GPP */
 872
 873
 874 static int already_connected(struct wpa_supplicant *wpa_s,
 875                              struct wpa_cred *cred, struct wpa_bss *bss)
 876 {
 877         struct wpa_ssid *ssid, *sel_ssid;
 878         struct wpa_bss *selected;
 879
 880         if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
 881                 return 0;
 882
 883         ssid = wpa_s->current_ssid;
 884         if (ssid->parent_cred != cred)
 885                 return 0;
 886
 887         if (ssid->ssid_len != bss->ssid_len ||
 888             os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 889                 return 0;
 890
 891         sel_ssid = NULL;
 892         selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
 893         if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
 894                 return 0; /* higher priority network in scan results */
 895
 896         return 1;
 897 }
 898
 899
 900 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
 901                                      struct wpa_cred *cred,
 902                                      struct wpa_bss *bss)
 903 {
 904         struct wpa_ssid *ssid;
 905
 906         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 907                 if (ssid->parent_cred != cred)
 908                         continue;
 909                 if (ssid->ssid_len != bss->ssid_len ||
 910                     os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 911                         continue;
 912
 913                 break;
 914         }
 915
 916         if (ssid == NULL)
 917                 return;
 918
 919         wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
 920
 921         if (ssid == wpa_s->current_ssid) {
 922                 wpa_sm_set_config(wpa_s->wpa, NULL);
 923                 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 924                 wpa_s->own_disconnect_req = 1;
 925                 wpa_supplicant_deauthenticate(wpa_s,
 926                                               WLAN_REASON_DEAUTH_LEAVING);
 927         }
 928
 929         wpas_notify_network_removed(wpa_s, ssid);
 930         wpa_config_remove_network(wpa_s->conf, ssid->id);
 931 }
 932
 933
 934 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 935                                         struct wpa_ssid *ssid)
 936 {
 937         const char *key_mgmt = NULL;
 938 #ifdef CONFIG_IEEE80211R
 939         int res;
 940         struct wpa_driver_capa capa;
 941
 942         res = wpa_drv_get_capa(wpa_s, &capa);
 943         if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
 944                 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 945                         "WPA-EAP WPA-EAP-SHA256 FT-EAP" :
 946                         "WPA-EAP FT-EAP";
 947         }
 948 #endif /* CONFIG_IEEE80211R */
 949
 950         if (!key_mgmt)
 951                 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 952                         "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
 953         if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0)
 954                 return -1;
 955         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 956                 return -1;
 957         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 958                 return -1;
 959         return 0;
 960 }
 961
 962
 963 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 964                                      struct wpa_cred *cred,
 965                                      struct wpa_bss *bss, int only_add)
 966 {
 967 #ifdef INTERWORKING_3GPP
 968         struct wpa_ssid *ssid;
 969         int eap_type;
 970         int res;
 971         char prefix;
 972
 973         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 974                 return -1;
 975
 976         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
 977                 " (3GPP)", MAC2STR(bss->bssid));
 978
 979         if (already_connected(wpa_s, cred, bss)) {
 980                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
 981                         MAC2STR(bss->bssid));
 982                 return wpa_s->current_ssid->id;
 983         }
 984
 985         remove_duplicate_network(wpa_s, cred, bss);
 986
 987         ssid = wpa_config_add_network(wpa_s->conf);
 988         if (ssid == NULL)
 989                 return -1;
 990         ssid->parent_cred = cred;
 991
 992         wpas_notify_network_added(wpa_s, ssid);
 993         wpa_config_set_network_defaults(ssid);
 994         ssid->priority = cred->priority;
 995         ssid->temporary = 1;
 996         ssid->ssid = os_zalloc(bss->ssid_len + 1);
 997         if (ssid->ssid == NULL)
 998                 goto fail;
 999         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1000         ssid->ssid_len = bss->ssid_len;
1001         ssid->eap.sim_num = cred->sim_num;
1002
1003         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1004                 goto fail;
1005
1006         eap_type = EAP_TYPE_SIM;
1007         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1008                 eap_type = EAP_TYPE_AKA;
1009         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1010                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1011                     cred->eap_method[0].method == EAP_TYPE_AKA ||
1012                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1013                         eap_type = cred->eap_method[0].method;
1014         }
1015
1016         switch (eap_type) {
1017         case EAP_TYPE_SIM:
1018                 prefix = '1';
1019                 res = wpa_config_set(ssid, "eap", "SIM", 0);
1020                 break;
1021         case EAP_TYPE_AKA:
1022                 prefix = '0';
1023                 res = wpa_config_set(ssid, "eap", "AKA", 0);
1024                 break;
1025         case EAP_TYPE_AKA_PRIME:
1026                 prefix = '6';
1027                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
1028                 break;
1029         default:
1030                 res = -1;
1031                 break;
1032         }
1033         if (res < 0) {
1034                 wpa_msg(wpa_s, MSG_DEBUG,
1035                         "Selected EAP method (%d) not supported", eap_type);
1036                 goto fail;
1037         }
1038
1039         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1040                 wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1041                 goto fail;
1042         }
1043
1044         if (cred->milenage && cred->milenage[0]) {
1045                 if (wpa_config_set_quoted(ssid, "password",
1046                                           cred->milenage) < 0)
1047                         goto fail;
1048         } else if (cred->pcsc) {
1049                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1050                         goto fail;
1051                 if (wpa_s->conf->pcsc_pin &&
1052                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1053                     < 0)
1054                         goto fail;
1055         }
1056
1057         wpa_s->next_ssid = ssid;
1058         wpa_config_update_prio_list(wpa_s->conf);
1059         if (!only_add)
1060                 interworking_reconnect(wpa_s);
1061
1062         return ssid->id;
1063
1064 fail:
1065         wpas_notify_network_removed(wpa_s, ssid);
1066         wpa_config_remove_network(wpa_s->conf, ssid->id);
1067 #endif /* INTERWORKING_3GPP */
1068         return -1;
1069 }
1070
1071
1072 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
1073                                             size_t rc_len)
1074 {
1075         const u8 *pos, *end;
1076         u8 lens;
1077
1078         if (ie == NULL)
1079                 return 0;
1080
1081         pos = ie + 2;
1082         end = ie + 2 + ie[1];
1083
1084         /* Roaming Consortium element:
1085          * Number of ANQP OIs
1086          * OI #1 and #2 lengths
1087          * OI #1, [OI #2], [OI #3]
1088          */
1089
1090         if (end - pos < 2)
1091                 return 0;
1092
1093         pos++; /* skip Number of ANQP OIs */
1094         lens = *pos++;
1095         if ((lens & 0x0f) + (lens >> 4) > end - pos)
1096                 return 0;
1097
1098         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1099                 return 1;
1100         pos += lens & 0x0f;
1101
1102         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1103                 return 1;
1104         pos += lens >> 4;
1105
1106         if (pos < end && (size_t) (end - pos) == rc_len &&
1107             os_memcmp(pos, rc_id, rc_len) == 0)
1108                 return 1;
1109
1110         return 0;
1111 }
1112
1113
1114 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1115                                          const u8 *rc_id, size_t rc_len)
1116 {
1117         const u8 *pos, *end;
1118         u8 len;
1119
1120         if (anqp == NULL)
1121                 return 0;
1122
1123         pos = wpabuf_head(anqp);
1124         end = pos + wpabuf_len(anqp);
1125
1126         /* Set of <OI Length, OI> duples */
1127         while (pos < end) {
1128                 len = *pos++;
1129                 if (len > end - pos)
1130                         break;
1131                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1132                         return 1;
1133                 pos += len;
1134         }
1135
1136         return 0;
1137 }
1138
1139
1140 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1141                                     const u8 *rc_id, size_t rc_len)
1142 {
1143         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1144                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1145 }
1146
1147
1148 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1149 {
1150         const u8 *ie;
1151
1152         if (cred->required_roaming_consortium_len == 0)
1153                 return 0;
1154
1155         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1156
1157         if (ie == NULL &&
1158             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1159                 return 1;
1160
1161         return !roaming_consortium_match(ie,
1162                                          bss->anqp ?
1163                                          bss->anqp->roaming_consortium : NULL,
1164                                          cred->required_roaming_consortium,
1165                                          cred->required_roaming_consortium_len);
1166 }
1167
1168
1169 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1170 {
1171         size_t i;
1172
1173         if (!cred->excluded_ssid)
1174                 return 0;
1175
1176         for (i = 0; i < cred->num_excluded_ssid; i++) {
1177                 struct excluded_ssid *e = &cred->excluded_ssid[i];
1178                 if (bss->ssid_len == e->ssid_len &&
1179                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1180                         return 1;
1181         }
1182
1183         return 0;
1184 }
1185
1186
1187 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1188                                    struct wpa_cred *cred, struct wpa_bss *bss)
1189 {
1190 #ifdef CONFIG_HS20
1191         int res;
1192         unsigned int dl_bandwidth, ul_bandwidth;
1193         const u8 *wan;
1194         u8 wan_info, dl_load, ul_load;
1195         u16 lmd;
1196         u32 ul_speed, dl_speed;
1197
1198         if (!cred->min_dl_bandwidth_home &&
1199             !cred->min_ul_bandwidth_home &&
1200             !cred->min_dl_bandwidth_roaming &&
1201             !cred->min_ul_bandwidth_roaming)
1202                 return 0; /* No bandwidth constraint specified */
1203
1204         if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1205                 return 0; /* No WAN Metrics known - ignore constraint */
1206
1207         wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1208         wan_info = wan[0];
1209         if (wan_info & BIT(3))
1210                 return 1; /* WAN link at capacity */
1211         lmd = WPA_GET_LE16(wan + 11);
1212         if (lmd == 0)
1213                 return 0; /* Downlink/Uplink Load was not measured */
1214         dl_speed = WPA_GET_LE32(wan + 1);
1215         ul_speed = WPA_GET_LE32(wan + 5);
1216         dl_load = wan[9];
1217         ul_load = wan[10];
1218
1219         if (dl_speed >= 0xffffff)
1220                 dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1221         else
1222                 dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1223
1224         if (ul_speed >= 0xffffff)
1225                 ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1226         else
1227                 ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1228
1229         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1230                                         bss->anqp->domain_name : NULL);
1231         if (res > 0) {
1232                 if (cred->min_dl_bandwidth_home > dl_bandwidth)
1233                         return 1;
1234                 if (cred->min_ul_bandwidth_home > ul_bandwidth)
1235                         return 1;
1236         } else {
1237                 if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1238                         return 1;
1239                 if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1240                         return 1;
1241         }
1242 #endif /* CONFIG_HS20 */
1243
1244         return 0;
1245 }
1246
1247
1248 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1249                                   struct wpa_cred *cred, struct wpa_bss *bss)
1250 {
1251         const u8 *ie;
1252         int res;
1253
1254         if (!cred->max_bss_load)
1255                 return 0; /* No BSS Load constraint specified */
1256
1257         ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1258         if (ie == NULL || ie[1] < 3)
1259                 return 0; /* No BSS Load advertised */
1260
1261         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1262                                         bss->anqp->domain_name : NULL);
1263         if (res <= 0)
1264                 return 0; /* Not a home network */
1265
1266         return ie[4] > cred->max_bss_load;
1267 }
1268
1269
1270 #ifdef CONFIG_HS20
1271
1272 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1273 {
1274         while (end - pos >= 4) {
1275                 if (pos[0] == proto && pos[3] == 1 /* Open */)
1276                         return 1;
1277                 pos += 4;
1278         }
1279
1280         return 0;
1281 }
1282
1283
1284 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1285                                 u16 port)
1286 {
1287         while (end - pos >= 4) {
1288                 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1289                     pos[3] == 1 /* Open */)
1290                         return 1;
1291                 pos += 4;
1292         }
1293
1294         return 0;
1295 }
1296
1297 #endif /* CONFIG_HS20 */
1298
1299
1300 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1301                                    struct wpa_cred *cred, struct wpa_bss *bss)
1302 {
1303 #ifdef CONFIG_HS20
1304         int res;
1305         const u8 *capab, *end;
1306         unsigned int i, j;
1307         int *ports;
1308
1309         if (!cred->num_req_conn_capab)
1310                 return 0; /* No connection capability constraint specified */
1311
1312         if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1313                 return 0; /* No Connection Capability known - ignore constraint
1314                            */
1315
1316         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1317                                         bss->anqp->domain_name : NULL);
1318         if (res > 0)
1319                 return 0; /* No constraint in home network */
1320
1321         capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1322         end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1323
1324         for (i = 0; i < cred->num_req_conn_capab; i++) {
1325                 ports = cred->req_conn_capab_port[i];
1326                 if (!ports) {
1327                         if (!has_proto_match(capab, end,
1328                                              cred->req_conn_capab_proto[i]))
1329                                 return 1;
1330                 } else {
1331                         for (j = 0; ports[j] > -1; j++) {
1332                                 if (!has_proto_port_match(
1333                                             capab, end,
1334                                             cred->req_conn_capab_proto[i],
1335                                             ports[j]))
1336                                         return 1;
1337                         }
1338                 }
1339         }
1340 #endif /* CONFIG_HS20 */
1341
1342         return 0;
1343 }
1344
1345
1346 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1347         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1348         int *excluded)
1349 {
1350         struct wpa_cred *cred, *selected = NULL;
1351         const u8 *ie;
1352         int is_excluded = 0;
1353
1354         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1355
1356         if (ie == NULL &&
1357             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1358                 return NULL;
1359
1360         if (wpa_s->conf->cred == NULL)
1361                 return NULL;
1362
1363         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1364                 if (cred->roaming_consortium_len == 0)
1365                         continue;
1366
1367                 if (!roaming_consortium_match(ie,
1368                                               bss->anqp ?
1369                                               bss->anqp->roaming_consortium :
1370                                               NULL,
1371                                               cred->roaming_consortium,
1372                                               cred->roaming_consortium_len))
1373                         continue;
1374
1375                 if (cred_no_required_oi_match(cred, bss))
1376                         continue;
1377                 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1378                         continue;
1379                 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1380                         continue;
1381                 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1382                         continue;
1383                 if (cred_excluded_ssid(cred, bss)) {
1384                         if (excluded == NULL)
1385                                 continue;
1386                         if (selected == NULL) {
1387                                 selected = cred;
1388                                 is_excluded = 1;
1389                         }
1390                 } else {
1391                         if (selected == NULL || is_excluded ||
1392                             cred_prio_cmp(selected, cred) < 0) {
1393                                 selected = cred;
1394                                 is_excluded = 0;
1395                         }
1396                 }
1397         }
1398
1399         if (excluded)
1400                 *excluded = is_excluded;
1401
1402         return selected;
1403 }
1404
1405
1406 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1407                                        struct wpa_cred *cred, int ttls)
1408 {
1409         if (cred->eap_method) {
1410                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1411                         cred->eap_method->method == EAP_TYPE_TTLS;
1412
1413                 os_free(ssid->eap.eap_methods);
1414                 ssid->eap.eap_methods =
1415                         os_malloc(sizeof(struct eap_method_type) * 2);
1416                 if (ssid->eap.eap_methods == NULL)
1417                         return -1;
1418                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1419                           sizeof(*cred->eap_method));
1420                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1421                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1422         }
1423
1424         if (ttls && cred->username && cred->username[0]) {
1425                 const char *pos;
1426                 char *anon;
1427                 /* Use anonymous NAI in Phase 1 */
1428                 pos = os_strchr(cred->username, '@');
1429                 if (pos) {
1430                         size_t buflen = 9 + os_strlen(pos) + 1;
1431                         anon = os_malloc(buflen);
1432                         if (anon == NULL)
1433                                 return -1;
1434                         os_snprintf(anon, buflen, "anonymous%s", pos);
1435                 } else if (cred->realm) {
1436                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1437                         anon = os_malloc(buflen);
1438                         if (anon == NULL)
1439                                 return -1;
1440                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1441                 } else {
1442                         anon = os_strdup("anonymous");
1443                         if (anon == NULL)
1444                                 return -1;
1445                 }
1446                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1447                     0) {
1448                         os_free(anon);
1449                         return -1;
1450                 }
1451                 os_free(anon);
1452         }
1453
1454         if (cred->username && cred->username[0] &&
1455             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1456                 return -1;
1457
1458         if (cred->password && cred->password[0]) {
1459                 if (cred->ext_password &&
1460                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1461                         return -1;
1462                 if (!cred->ext_password &&
1463                     wpa_config_set_quoted(ssid, "password", cred->password) <
1464                     0)
1465                         return -1;
1466         }
1467
1468         if (cred->client_cert && cred->client_cert[0] &&
1469             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1470                 return -1;
1471
1472 #ifdef ANDROID
1473         if (cred->private_key &&
1474             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1475                 /* Use OpenSSL engine configuration for Android keystore */
1476                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1477                     wpa_config_set_quoted(ssid, "key_id",
1478                                           cred->private_key + 11) < 0 ||
1479                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1480                         return -1;
1481         } else
1482 #endif /* ANDROID */
1483         if (cred->private_key && cred->private_key[0] &&
1484             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1485                 return -1;
1486
1487         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1488             wpa_config_set_quoted(ssid, "private_key_passwd",
1489                                   cred->private_key_passwd) < 0)
1490                 return -1;
1491
1492         if (cred->phase1) {
1493                 os_free(ssid->eap.phase1);
1494                 ssid->eap.phase1 = os_strdup(cred->phase1);
1495         }
1496         if (cred->phase2) {
1497                 os_free(ssid->eap.phase2);
1498                 ssid->eap.phase2 = os_strdup(cred->phase2);
1499         }
1500
1501         if (cred->ca_cert && cred->ca_cert[0] &&
1502             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1503                 return -1;
1504
1505         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1506             wpa_config_set_quoted(ssid, "domain_suffix_match",
1507                                   cred->domain_suffix_match) < 0)
1508                 return -1;
1509
1510         ssid->eap.ocsp = cred->ocsp;
1511
1512         return 0;
1513 }
1514
1515
1516 static int interworking_connect_roaming_consortium(
1517         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1518         struct wpa_bss *bss, int only_add)
1519 {
1520         struct wpa_ssid *ssid;
1521
1522         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1523                 " based on roaming consortium match", MAC2STR(bss->bssid));
1524
1525         if (already_connected(wpa_s, cred, bss)) {
1526                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1527                         MAC2STR(bss->bssid));
1528                 return wpa_s->current_ssid->id;
1529         }
1530
1531         remove_duplicate_network(wpa_s, cred, bss);
1532
1533         ssid = wpa_config_add_network(wpa_s->conf);
1534         if (ssid == NULL)
1535                 return -1;
1536         ssid->parent_cred = cred;
1537         wpas_notify_network_added(wpa_s, ssid);
1538         wpa_config_set_network_defaults(ssid);
1539         ssid->priority = cred->priority;
1540         ssid->temporary = 1;
1541         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1542         if (ssid->ssid == NULL)
1543                 goto fail;
1544         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1545         ssid->ssid_len = bss->ssid_len;
1546
1547         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1548                 goto fail;
1549
1550         if (cred->eap_method == NULL) {
1551                 wpa_msg(wpa_s, MSG_DEBUG,
1552                         "Interworking: No EAP method set for credential using roaming consortium");
1553                 goto fail;
1554         }
1555
1556         if (interworking_set_eap_params(
1557                     ssid, cred,
1558                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1559                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1560                 goto fail;
1561
1562         wpa_s->next_ssid = ssid;
1563         wpa_config_update_prio_list(wpa_s->conf);
1564         if (!only_add)
1565                 interworking_reconnect(wpa_s);
1566
1567         return ssid->id;
1568
1569 fail:
1570         wpas_notify_network_removed(wpa_s, ssid);
1571         wpa_config_remove_network(wpa_s->conf, ssid->id);
1572         return -1;
1573 }
1574
1575
1576 static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
1577                                        struct wpa_bss *bss, int allow_excluded,
1578                                        int only_add)
1579 {
1580         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1581         struct wpa_ssid *ssid;
1582         struct nai_realm *realm;
1583         struct nai_realm_eap *eap = NULL;
1584         u16 count, i;
1585         char buf[100];
1586         int excluded = 0, *excl = allow_excluded ? &excluded : NULL;
1587         const char *name;
1588
1589         if (wpa_s->conf->cred == NULL || bss == NULL)
1590                 return -1;
1591         if (disallowed_bssid(wpa_s, bss->bssid) ||
1592             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1593                 wpa_msg(wpa_s, MSG_DEBUG,
1594                         "Interworking: Reject connection to disallowed BSS "
1595                         MACSTR, MAC2STR(bss->bssid));
1596                 return -1;
1597         }
1598
1599         wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1600                    " for connection (allow_excluded=%d)",
1601                    MAC2STR(bss->bssid), allow_excluded);
1602
1603         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1604                 /*
1605                  * We currently support only HS 2.0 networks and those are
1606                  * required to use WPA2-Enterprise.
1607                  */
1608                 wpa_msg(wpa_s, MSG_DEBUG,
1609                         "Interworking: Network does not use RSN");
1610                 return -1;
1611         }
1612
1613         cred_rc = interworking_credentials_available_roaming_consortium(
1614                 wpa_s, bss, 0, excl);
1615         if (cred_rc) {
1616                 wpa_msg(wpa_s, MSG_DEBUG,
1617                         "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1618                         cred_rc->priority, cred_rc->sp_priority);
1619                 if (allow_excluded && excl && !(*excl))
1620                         excl = NULL;
1621         }
1622
1623         cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1624         if (cred) {
1625                 wpa_msg(wpa_s, MSG_DEBUG,
1626                         "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1627                         cred->priority, cred->sp_priority);
1628                 if (allow_excluded && excl && !(*excl))
1629                         excl = NULL;
1630         }
1631
1632         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1633                                                             excl);
1634         if (cred_3gpp) {
1635                 wpa_msg(wpa_s, MSG_DEBUG,
1636                         "Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1637                         cred_3gpp->priority, cred_3gpp->sp_priority);
1638                 if (allow_excluded && excl && !(*excl))
1639                         excl = NULL;
1640         }
1641
1642         if (!cred_rc && !cred && !cred_3gpp) {
1643                 wpa_msg(wpa_s, MSG_DEBUG,
1644                         "Interworking: No full credential matches - consider options without BW(etc.) limits");
1645                 cred_rc = interworking_credentials_available_roaming_consortium(
1646                         wpa_s, bss, 1, excl);
1647                 if (cred_rc) {
1648                         wpa_msg(wpa_s, MSG_DEBUG,
1649                                 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1650                                 cred_rc->priority, cred_rc->sp_priority);
1651                         if (allow_excluded && excl && !(*excl))
1652                                 excl = NULL;
1653                 }
1654
1655                 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1656                                                                 excl);
1657                 if (cred) {
1658                         wpa_msg(wpa_s, MSG_DEBUG,
1659                                 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1660                                 cred->priority, cred->sp_priority);
1661                         if (allow_excluded && excl && !(*excl))
1662                                 excl = NULL;
1663                 }
1664
1665                 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1666                                                                     1, excl);
1667                 if (cred_3gpp) {
1668                         wpa_msg(wpa_s, MSG_DEBUG,
1669                                 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1670                                 cred_3gpp->priority, cred_3gpp->sp_priority);
1671                         if (allow_excluded && excl && !(*excl))
1672                                 excl = NULL;
1673                 }
1674         }
1675
1676         if (cred_rc &&
1677             (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1678             (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1679                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1680                                                                bss, only_add);
1681
1682         if (cred_3gpp &&
1683             (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1684                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1685                                                  only_add);
1686         }
1687
1688         if (cred == NULL) {
1689                 wpa_msg(wpa_s, MSG_DEBUG,
1690                         "Interworking: No matching credentials found for "
1691                         MACSTR, MAC2STR(bss->bssid));
1692                 return -1;
1693         }
1694
1695         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1696                                 &count);
1697         if (realm == NULL) {
1698                 wpa_msg(wpa_s, MSG_DEBUG,
1699                         "Interworking: Could not parse NAI Realm list from "
1700                         MACSTR, MAC2STR(bss->bssid));
1701                 return -1;
1702         }
1703
1704         for (i = 0; i < count; i++) {
1705                 if (!nai_realm_match(&realm[i], cred->realm))
1706                         continue;
1707                 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1708                 if (eap)
1709                         break;
1710         }
1711
1712         if (!eap) {
1713                 wpa_msg(wpa_s, MSG_DEBUG,
1714                         "Interworking: No matching credentials and EAP method found for "
1715                         MACSTR, MAC2STR(bss->bssid));
1716                 nai_realm_free(realm, count);
1717                 return -1;
1718         }
1719
1720         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1721                 MAC2STR(bss->bssid));
1722
1723         if (already_connected(wpa_s, cred, bss)) {
1724                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1725                         MAC2STR(bss->bssid));
1726                 nai_realm_free(realm, count);
1727                 return 0;
1728         }
1729
1730         remove_duplicate_network(wpa_s, cred, bss);
1731
1732         ssid = wpa_config_add_network(wpa_s->conf);
1733         if (ssid == NULL) {
1734                 nai_realm_free(realm, count);
1735                 return -1;
1736         }
1737         ssid->parent_cred = cred;
1738         wpas_notify_network_added(wpa_s, ssid);
1739         wpa_config_set_network_defaults(ssid);
1740         ssid->priority = cred->priority;
1741         ssid->temporary = 1;
1742         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1743         if (ssid->ssid == NULL)
1744                 goto fail;
1745         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1746         ssid->ssid_len = bss->ssid_len;
1747
1748         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1749                 goto fail;
1750
1751         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1752                                                      eap->method), 0) < 0)
1753                 goto fail;
1754
1755         switch (eap->method) {
1756         case EAP_TYPE_TTLS:
1757                 if (eap->inner_method) {
1758                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1759                                     eap_get_name(EAP_VENDOR_IETF,
1760                                                  eap->inner_method));
1761                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1762                                 goto fail;
1763                         break;
1764                 }
1765                 switch (eap->inner_non_eap) {
1766                 case NAI_REALM_INNER_NON_EAP_PAP:
1767                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1768                             0)
1769                                 goto fail;
1770                         break;
1771                 case NAI_REALM_INNER_NON_EAP_CHAP:
1772                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1773                             < 0)
1774                                 goto fail;
1775                         break;
1776                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1777                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1778                                            0) < 0)
1779                                 goto fail;
1780                         break;
1781                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1782                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1783                                            0) < 0)
1784                                 goto fail;
1785                         break;
1786                 default:
1787                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1788                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1789                                            0) < 0)
1790                                 goto fail;
1791                         break;
1792                 }
1793                 break;
1794         case EAP_TYPE_PEAP:
1795         case EAP_TYPE_FAST:
1796                 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1797                                    0) < 0)
1798                         goto fail;
1799                 if (wpa_config_set(ssid, "pac_file",
1800                                    "\"blob://pac_interworking\"", 0) < 0)
1801                         goto fail;
1802                 name = eap_get_name(EAP_VENDOR_IETF,
1803                                     eap->inner_method ? eap->inner_method :
1804                                     EAP_TYPE_MSCHAPV2);
1805                 if (name == NULL)
1806                         goto fail;
1807                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1808                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1809                         goto fail;
1810                 break;
1811         case EAP_TYPE_TLS:
1812                 break;
1813         }
1814
1815         if (interworking_set_eap_params(ssid, cred,
1816                                         eap->method == EAP_TYPE_TTLS) < 0)
1817                 goto fail;
1818
1819         nai_realm_free(realm, count);
1820
1821         wpa_s->next_ssid = ssid;
1822         wpa_config_update_prio_list(wpa_s->conf);
1823         if (!only_add)
1824                 interworking_reconnect(wpa_s);
1825
1826         return ssid->id;
1827
1828 fail:
1829         wpas_notify_network_removed(wpa_s, ssid);
1830         wpa_config_remove_network(wpa_s->conf, ssid->id);
1831         nai_realm_free(realm, count);
1832         return -1;
1833 }
1834
1835
1836 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1837                          int only_add)
1838 {
1839         return interworking_connect_helper(wpa_s, bss, 1, only_add);
1840 }
1841
1842
1843 #ifdef PCSC_FUNCS
1844 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1845 {
1846         size_t len;
1847
1848         if (wpa_s->imsi[0] && wpa_s->mnc_len)
1849                 return 0;
1850
1851         len = sizeof(wpa_s->imsi) - 1;
1852         if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1853                 scard_deinit(wpa_s->scard);
1854                 wpa_s->scard = NULL;
1855                 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1856                 return -1;
1857         }
1858         wpa_s->imsi[len] = '\0';
1859         wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1860         wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1861                    wpa_s->imsi, wpa_s->mnc_len);
1862
1863         return 0;
1864 }
1865 #endif /* PCSC_FUNCS */
1866
1867
1868 static struct wpa_cred * interworking_credentials_available_3gpp(
1869         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1870         int *excluded)
1871 {
1872         struct wpa_cred *selected = NULL;
1873 #ifdef INTERWORKING_3GPP
1874         struct wpa_cred *cred;
1875         int ret;
1876         int is_excluded = 0;
1877
1878         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1879                 wpa_msg(wpa_s, MSG_DEBUG,
1880                         "interworking-avail-3gpp: not avail, anqp: %p  anqp_3gpp: %p",
1881                         bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1882                 return NULL;
1883         }
1884
1885 #ifdef CONFIG_EAP_PROXY
1886         if (!wpa_s->imsi[0]) {
1887                 size_t len;
1888                 wpa_msg(wpa_s, MSG_DEBUG,
1889                         "Interworking: IMSI not available - try to read again through eap_proxy");
1890                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1891                                                              wpa_s->imsi,
1892                                                              &len);
1893                 if (wpa_s->mnc_len > 0) {
1894                         wpa_s->imsi[len] = '\0';
1895                         wpa_msg(wpa_s, MSG_DEBUG,
1896                                 "eap_proxy: IMSI %s (MNC length %d)",
1897                                 wpa_s->imsi, wpa_s->mnc_len);
1898                 } else {
1899                         wpa_msg(wpa_s, MSG_DEBUG,
1900                                 "eap_proxy: IMSI not available");
1901                 }
1902         }
1903 #endif /* CONFIG_EAP_PROXY */
1904
1905         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1906                 char *sep;
1907                 const char *imsi;
1908                 int mnc_len;
1909                 char imsi_buf[16];
1910                 size_t msin_len;
1911
1912 #ifdef PCSC_FUNCS
1913                 if (cred->pcsc && wpa_s->scard) {
1914                         if (interworking_pcsc_read_imsi(wpa_s) < 0)
1915                                 continue;
1916                         imsi = wpa_s->imsi;
1917                         mnc_len = wpa_s->mnc_len;
1918                         goto compare;
1919                 }
1920 #endif /* PCSC_FUNCS */
1921 #ifdef CONFIG_EAP_PROXY
1922                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1923                         imsi = wpa_s->imsi;
1924                         mnc_len = wpa_s->mnc_len;
1925                         goto compare;
1926                 }
1927 #endif /* CONFIG_EAP_PROXY */
1928
1929                 if (cred->imsi == NULL || !cred->imsi[0] ||
1930                     (!wpa_s->conf->external_sim &&
1931                      (cred->milenage == NULL || !cred->milenage[0])))
1932                         continue;
1933
1934                 sep = os_strchr(cred->imsi, '-');
1935                 if (sep == NULL ||
1936                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1937                         continue;
1938                 mnc_len = sep - cred->imsi - 3;
1939                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1940                 sep++;
1941                 msin_len = os_strlen(cred->imsi);
1942                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1943                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1944                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1945                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1946                 imsi = imsi_buf;
1947
1948 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1949         compare:
1950 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1951                 wpa_msg(wpa_s, MSG_DEBUG,
1952                         "Interworking: Parsing 3GPP info from " MACSTR,
1953                         MAC2STR(bss->bssid));
1954                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1955                 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
1956                         ret ? "" : "not ");
1957                 if (ret) {
1958                         if (cred_no_required_oi_match(cred, bss))
1959                                 continue;
1960                         if (!ignore_bw &&
1961                             cred_below_min_backhaul(wpa_s, cred, bss))
1962                                 continue;
1963                         if (!ignore_bw &&
1964                             cred_over_max_bss_load(wpa_s, cred, bss))
1965                                 continue;
1966                         if (!ignore_bw &&
1967                             cred_conn_capab_missing(wpa_s, cred, bss))
1968                                 continue;
1969                         if (cred_excluded_ssid(cred, bss)) {
1970                                 if (excluded == NULL)
1971                                         continue;
1972                                 if (selected == NULL) {
1973                                         selected = cred;
1974                                         is_excluded = 1;
1975                                 }
1976                         } else {
1977                                 if (selected == NULL || is_excluded ||
1978                                     cred_prio_cmp(selected, cred) < 0) {
1979                                         selected = cred;
1980                                         is_excluded = 0;
1981                                 }
1982                         }
1983                 }
1984         }
1985
1986         if (excluded)
1987                 *excluded = is_excluded;
1988 #endif /* INTERWORKING_3GPP */
1989         return selected;
1990 }
1991
1992
1993 static struct wpa_cred * interworking_credentials_available_realm(
1994         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1995         int *excluded)
1996 {
1997         struct wpa_cred *cred, *selected = NULL;
1998         struct nai_realm *realm;
1999         u16 count, i;
2000         int is_excluded = 0;
2001
2002         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
2003                 return NULL;
2004
2005         if (wpa_s->conf->cred == NULL)
2006                 return NULL;
2007
2008         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
2009                 MACSTR, MAC2STR(bss->bssid));
2010         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
2011         if (realm == NULL) {
2012                 wpa_msg(wpa_s, MSG_DEBUG,
2013                         "Interworking: Could not parse NAI Realm list from "
2014                         MACSTR, MAC2STR(bss->bssid));
2015                 return NULL;
2016         }
2017
2018         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2019                 if (cred->realm == NULL)
2020                         continue;
2021
2022                 for (i = 0; i < count; i++) {
2023                         if (!nai_realm_match(&realm[i], cred->realm))
2024                                 continue;
2025                         if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2026                                 if (cred_no_required_oi_match(cred, bss))
2027                                         continue;
2028                                 if (!ignore_bw &&
2029                                     cred_below_min_backhaul(wpa_s, cred, bss))
2030                                         continue;
2031                                 if (!ignore_bw &&
2032                                     cred_over_max_bss_load(wpa_s, cred, bss))
2033                                         continue;
2034                                 if (!ignore_bw &&
2035                                     cred_conn_capab_missing(wpa_s, cred, bss))
2036                                         continue;
2037                                 if (cred_excluded_ssid(cred, bss)) {
2038                                         if (excluded == NULL)
2039                                                 continue;
2040                                         if (selected == NULL) {
2041                                                 selected = cred;
2042                                                 is_excluded = 1;
2043                                         }
2044                                 } else {
2045                                         if (selected == NULL || is_excluded ||
2046                                             cred_prio_cmp(selected, cred) < 0)
2047                                         {
2048                                                 selected = cred;
2049                                                 is_excluded = 0;
2050                                         }
2051                                 }
2052                                 break;
2053                         } else {
2054                                 wpa_msg(wpa_s, MSG_DEBUG,
2055                                         "Interworking: realm-find-eap returned false");
2056                         }
2057                 }
2058         }
2059
2060         nai_realm_free(realm, count);
2061
2062         if (excluded)
2063                 *excluded = is_excluded;
2064
2065         return selected;
2066 }
2067
2068
2069 static struct wpa_cred * interworking_credentials_available_helper(
2070         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2071         int *excluded)
2072 {
2073         struct wpa_cred *cred, *cred2;
2074         int excluded1, excluded2 = 0;
2075
2076         if (disallowed_bssid(wpa_s, bss->bssid) ||
2077             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2078                 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2079                            MACSTR, MAC2STR(bss->bssid));
2080                 return NULL;
2081         }
2082
2083         cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2084                                                         &excluded1);
2085         cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2086                                                         &excluded2);
2087         if (cred && cred2 &&
2088             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2089                 cred = cred2;
2090                 excluded1 = excluded2;
2091         }
2092         if (!cred) {
2093                 cred = cred2;
2094                 excluded1 = excluded2;
2095         }
2096
2097         cred2 = interworking_credentials_available_roaming_consortium(
2098                 wpa_s, bss, ignore_bw, &excluded2);
2099         if (cred && cred2 &&
2100             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2101                 cred = cred2;
2102                 excluded1 = excluded2;
2103         }
2104         if (!cred) {
2105                 cred = cred2;
2106                 excluded1 = excluded2;
2107         }
2108
2109         if (excluded)
2110                 *excluded = excluded1;
2111         return cred;
2112 }
2113
2114
2115 static struct wpa_cred * interworking_credentials_available(
2116         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2117 {
2118         struct wpa_cred *cred;
2119
2120         if (excluded)
2121                 *excluded = 0;
2122         cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2123                                                          excluded);
2124         if (cred)
2125                 return cred;
2126         return interworking_credentials_available_helper(wpa_s, bss, 1,
2127                                                          excluded);
2128 }
2129
2130
2131 int domain_name_list_contains(struct wpabuf *domain_names,
2132                               const char *domain, int exact_match)
2133 {
2134         const u8 *pos, *end;
2135         size_t len;
2136
2137         len = os_strlen(domain);
2138         pos = wpabuf_head(domain_names);
2139         end = pos + wpabuf_len(domain_names);
2140
2141         while (end - pos > 1) {
2142                 u8 elen;
2143
2144                 elen = *pos++;
2145                 if (elen > end - pos)
2146                         break;
2147
2148                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2149                                   pos, elen);
2150                 if (elen == len &&
2151                     os_strncasecmp(domain, (const char *) pos, len) == 0)
2152                         return 1;
2153                 if (!exact_match && elen > len && pos[elen - len - 1] == '.') {
2154                         const char *ap = (const char *) pos;
2155                         int offset = elen - len;
2156
2157                         if (os_strncasecmp(domain, ap + offset, len) == 0)
2158                                 return 1;
2159                 }
2160
2161                 pos += elen;
2162         }
2163
2164         return 0;
2165 }
2166
2167
2168 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2169                               struct wpa_cred *cred,
2170                               struct wpabuf *domain_names)
2171 {
2172         size_t i;
2173         int ret = -1;
2174 #ifdef INTERWORKING_3GPP
2175         char nai[100], *realm;
2176
2177         char *imsi = NULL;
2178         int mnc_len = 0;
2179         if (cred->imsi)
2180                 imsi = cred->imsi;
2181 #ifdef PCSC_FUNCS
2182         else if (cred->pcsc && wpa_s->scard) {
2183                 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2184                         return -1;
2185                 imsi = wpa_s->imsi;
2186                 mnc_len = wpa_s->mnc_len;
2187         }
2188 #endif /* PCSC_FUNCS */
2189 #ifdef CONFIG_EAP_PROXY
2190         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2191                 imsi = wpa_s->imsi;
2192                 mnc_len = wpa_s->mnc_len;
2193         }
2194 #endif /* CONFIG_EAP_PROXY */
2195         if (domain_names &&
2196             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2197                 realm = os_strchr(nai, '@');
2198                 if (realm)
2199                         realm++;
2200                 wpa_msg(wpa_s, MSG_DEBUG,
2201                         "Interworking: Search for match with SIM/USIM domain %s",
2202                         realm);
2203                 if (realm &&
2204                     domain_name_list_contains(domain_names, realm, 1))
2205                         return 1;
2206                 if (realm)
2207                         ret = 0;
2208         }
2209 #endif /* INTERWORKING_3GPP */
2210
2211         if (domain_names == NULL || cred->domain == NULL)
2212                 return ret;
2213
2214         for (i = 0; i < cred->num_domain; i++) {
2215                 wpa_msg(wpa_s, MSG_DEBUG,
2216                         "Interworking: Search for match with home SP FQDN %s",
2217                         cred->domain[i]);
2218                 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2219                         return 1;
2220         }
2221
2222         return 0;
2223 }
2224
2225
2226 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2227                                 struct wpabuf *domain_names)
2228 {
2229         struct wpa_cred *cred;
2230
2231         if (domain_names == NULL || wpa_s->conf->cred == NULL)
2232                 return -1;
2233
2234         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2235                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2236                 if (res)
2237                         return res;
2238         }
2239
2240         return 0;
2241 }
2242
2243
2244 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2245 {
2246         struct wpa_bss *bss;
2247         struct wpa_ssid *ssid;
2248
2249         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2250                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2251                         if (wpas_network_disabled(wpa_s, ssid) ||
2252                             ssid->mode != WPAS_MODE_INFRA)
2253                                 continue;
2254                         if (ssid->ssid_len != bss->ssid_len ||
2255                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2256                             0)
2257                                 continue;
2258                         /*
2259                          * TODO: Consider more accurate matching of security
2260                          * configuration similarly to what is done in events.c
2261                          */
2262                         return 1;
2263                 }
2264         }
2265
2266         return 0;
2267 }
2268
2269
2270 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2271                                  struct roaming_partner *partner,
2272                                  struct wpabuf *domain_names)
2273 {
2274         wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2275                    partner->fqdn, partner->exact_match, partner->priority,
2276                    partner->country);
2277         wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2278                           wpabuf_head(domain_names),
2279                           wpabuf_len(domain_names));
2280         if (!domain_name_list_contains(domain_names, partner->fqdn,
2281                                        partner->exact_match))
2282                 return 0;
2283         /* TODO: match Country */
2284         return 1;
2285 }
2286
2287
2288 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2289                        struct wpa_bss *bss)
2290 {
2291         size_t i;
2292
2293         if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2294                 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2295                 return 128; /* cannot check preference with domain name */
2296         }
2297
2298         if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2299         {
2300                 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2301                 return 0; /* max preference for home SP network */
2302         }
2303
2304         for (i = 0; i < cred->num_roaming_partner; i++) {
2305                 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2306                                           bss->anqp->domain_name)) {
2307                         wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2308                                    cred->roaming_partner[i].priority);
2309                         return cred->roaming_partner[i].priority;
2310                 }
2311         }
2312
2313         wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2314         return 128;
2315 }
2316
2317
2318 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2319                                                   struct wpa_bss *selected,
2320                                                   struct wpa_cred *cred)
2321 {
2322         struct wpa_bss *bss;
2323         u8 best_prio, prio;
2324         struct wpa_cred *cred2;
2325
2326         /*
2327          * Check if any other BSS is operated by a more preferred roaming
2328          * partner.
2329          */
2330
2331         best_prio = roaming_prio(wpa_s, cred, selected);
2332         wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2333                    MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2334                    cred->id);
2335
2336         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2337                 if (bss == selected)
2338                         continue;
2339                 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2340                 if (!cred2)
2341                         continue;
2342                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2343                         continue;
2344                 prio = roaming_prio(wpa_s, cred2, bss);
2345                 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2346                            MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2347                            cred2->id);
2348                 if (prio < best_prio) {
2349                         int bh1, bh2, load1, load2, conn1, conn2;
2350                         bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2351                         load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2352                         conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2353                         bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2354                         load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2355                         conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2356                         wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d  new: %d %d %d",
2357                                    bh1, load1, conn1, bh2, load2, conn2);
2358                         if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2359                                 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2360                                 best_prio = prio;
2361                                 selected = bss;
2362                         }
2363                 }
2364         }
2365
2366         return selected;
2367 }
2368
2369
2370 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2371 {
2372         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2373         struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2374         unsigned int count = 0;
2375         const char *type;
2376         int res;
2377         struct wpa_cred *cred, *selected_cred = NULL;
2378         struct wpa_cred *selected_home_cred = NULL;
2379         struct wpa_cred *selected2_cred = NULL;
2380         struct wpa_cred *selected2_home_cred = NULL;
2381
2382         wpa_s->network_select = 0;
2383
2384         wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2385                    wpa_s->auto_select);
2386         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2387                 int excluded = 0;
2388                 int bh, bss_load, conn_capab;
2389                 cred = interworking_credentials_available(wpa_s, bss,
2390                                                           &excluded);
2391                 if (!cred)
2392                         continue;
2393
2394                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2395                         /*
2396                          * We currently support only HS 2.0 networks and those
2397                          * are required to use WPA2-Enterprise.
2398                          */
2399                         wpa_msg(wpa_s, MSG_DEBUG,
2400                                 "Interworking: Credential match with " MACSTR
2401                                 " but network does not use RSN",
2402                                 MAC2STR(bss->bssid));
2403                         continue;
2404                 }
2405                 if (!excluded)
2406                         count++;
2407                 res = interworking_home_sp(wpa_s, bss->anqp ?
2408                                            bss->anqp->domain_name : NULL);
2409                 if (res > 0)
2410                         type = "home";
2411                 else if (res == 0)
2412                         type = "roaming";
2413                 else
2414                         type = "unknown";
2415                 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2416                 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2417                 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2418                 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2419                         excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2420                         MAC2STR(bss->bssid), type,
2421                         bh ? " below_min_backhaul=1" : "",
2422                         bss_load ? " over_max_bss_load=1" : "",
2423                         conn_capab ? " conn_capab_missing=1" : "",
2424                         cred->id, cred->priority, cred->sp_priority);
2425                 if (excluded)
2426                         continue;
2427                 if (wpa_s->auto_select ||
2428                     (wpa_s->conf->auto_interworking &&
2429                      wpa_s->auto_network_select)) {
2430                         if (bh || bss_load || conn_capab) {
2431                                 if (selected2_cred == NULL ||
2432                                     cred_prio_cmp(cred, selected2_cred) > 0) {
2433                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2434                                         selected2 = bss;
2435                                         selected2_cred = cred;
2436                                 }
2437                                 if (res > 0 &&
2438                                     (selected2_home_cred == NULL ||
2439                                      cred_prio_cmp(cred, selected2_home_cred) >
2440                                      0)) {
2441                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2442                                         selected2_home = bss;
2443                                         selected2_home_cred = cred;
2444                                 }
2445                         } else {
2446                                 if (selected_cred == NULL ||
2447                                     cred_prio_cmp(cred, selected_cred) > 0) {
2448                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2449                                         selected = bss;
2450                                         selected_cred = cred;
2451                                 }
2452                                 if (res > 0 &&
2453                                     (selected_home_cred == NULL ||
2454                                      cred_prio_cmp(cred, selected_home_cred) >
2455                                      0)) {
2456                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2457                                         selected_home = bss;
2458                                         selected_home_cred = cred;
2459                                 }
2460                         }
2461                 }
2462         }
2463
2464         if (selected_home && selected_home != selected &&
2465             selected_home_cred &&
2466             (selected_cred == NULL ||
2467              cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2468                 /* Prefer network operated by the Home SP */
2469                 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2470                 selected = selected_home;
2471                 selected_cred = selected_home_cred;
2472         }
2473
2474         if (!selected) {
2475                 if (selected2_home) {
2476                         wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2477                         selected = selected2_home;
2478                         selected_cred = selected2_home_cred;
2479                 } else if (selected2) {
2480                         wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2481                         selected = selected2;
2482                         selected_cred = selected2_cred;
2483                 }
2484         }
2485
2486         if (count == 0) {
2487                 /*
2488                  * No matching network was found based on configured
2489                  * credentials. Check whether any of the enabled network blocks
2490                  * have matching APs.
2491                  */
2492                 if (interworking_find_network_match(wpa_s)) {
2493                         wpa_msg(wpa_s, MSG_DEBUG,
2494                                 "Interworking: Possible BSS match for enabled network configurations");
2495                         if (wpa_s->auto_select) {
2496                                 interworking_reconnect(wpa_s);
2497                                 return;
2498                         }
2499                 }
2500
2501                 if (wpa_s->auto_network_select) {
2502                         wpa_msg(wpa_s, MSG_DEBUG,
2503                                 "Interworking: Continue scanning after ANQP fetch");
2504                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2505                                                 0);
2506                         return;
2507                 }
2508
2509                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2510                         "with matching credentials found");
2511                 if (wpa_s->wpa_state == WPA_SCANNING)
2512                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2513         }
2514
2515         if (selected) {
2516                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2517                            MAC2STR(selected->bssid));
2518                 selected = pick_best_roaming_partner(wpa_s, selected,
2519                                                      selected_cred);
2520                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2521                            " (after best roaming partner selection)",
2522                            MAC2STR(selected->bssid));
2523                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2524                         MAC2STR(selected->bssid));
2525                 interworking_connect(wpa_s, selected, 0);
2526         }
2527 }
2528
2529
2530 static struct wpa_bss_anqp *
2531 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2532 {
2533         struct wpa_bss *other;
2534
2535         if (is_zero_ether_addr(bss->hessid))
2536                 return NULL; /* Cannot be in the same homegenous ESS */
2537
2538         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2539                 if (other == bss)
2540                         continue;
2541                 if (other->anqp == NULL)
2542                         continue;
2543                 if (other->anqp->roaming_consortium == NULL &&
2544                     other->anqp->nai_realm == NULL &&
2545                     other->anqp->anqp_3gpp == NULL &&
2546                     other->anqp->domain_name == NULL)
2547                         continue;
2548                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2549                         continue;
2550                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2551                         continue;
2552                 if (bss->ssid_len != other->ssid_len ||
2553                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2554                         continue;
2555
2556                 wpa_msg(wpa_s, MSG_DEBUG,
2557                         "Interworking: Share ANQP data with already fetched BSSID "
2558                         MACSTR " and " MACSTR,
2559                         MAC2STR(other->bssid), MAC2STR(bss->bssid));
2560                 other->anqp->users++;
2561                 return other->anqp;
2562         }
2563
2564         return NULL;
2565 }
2566
2567
2568 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2569 {
2570         struct wpa_bss *bss;
2571         int found = 0;
2572         const u8 *ie;
2573
2574         wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2575                    "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2576                    wpa_s->fetch_anqp_in_progress,
2577                    wpa_s->fetch_osu_icon_in_progress);
2578
2579         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2580                 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2581                 return;
2582         }
2583
2584 #ifdef CONFIG_HS20
2585         if (wpa_s->fetch_osu_icon_in_progress) {
2586                 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2587                 hs20_next_osu_icon(wpa_s);
2588                 return;
2589         }
2590 #endif /* CONFIG_HS20 */
2591
2592         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2593                 if (!(bss->caps & IEEE80211_CAP_ESS))
2594                         continue;
2595                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2596                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2597                         continue; /* AP does not support Interworking */
2598                 if (disallowed_bssid(wpa_s, bss->bssid) ||
2599                     disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2600                         continue; /* Disallowed BSS */
2601
2602                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2603                         if (bss->anqp == NULL) {
2604                                 bss->anqp = interworking_match_anqp_info(wpa_s,
2605                                                                          bss);
2606                                 if (bss->anqp) {
2607                                         /* Shared data already fetched */
2608                                         continue;
2609                                 }
2610                                 bss->anqp = wpa_bss_anqp_alloc();
2611                                 if (bss->anqp == NULL)
2612                                         break;
2613                         }
2614                         found++;
2615                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2616                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2617                                 MACSTR, MAC2STR(bss->bssid));
2618                         interworking_anqp_send_req(wpa_s, bss);
2619                         break;
2620                 }
2621         }
2622
2623         if (found == 0) {
2624 #ifdef CONFIG_HS20
2625                 if (wpa_s->fetch_osu_info) {
2626                         if (wpa_s->num_prov_found == 0 &&
2627                             wpa_s->fetch_osu_waiting_scan &&
2628                             wpa_s->num_osu_scans < 3) {
2629                                 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2630                                 hs20_start_osu_scan(wpa_s);
2631                                 return;
2632                         }
2633                         wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2634                         hs20_osu_icon_fetch(wpa_s);
2635                         return;
2636                 }
2637 #endif /* CONFIG_HS20 */
2638                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2639                 wpa_s->fetch_anqp_in_progress = 0;
2640                 if (wpa_s->network_select)
2641                         interworking_select_network(wpa_s);
2642         }
2643 }
2644
2645
2646 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2647 {
2648         struct wpa_bss *bss;
2649
2650         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2651                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2652
2653         wpa_s->fetch_anqp_in_progress = 1;
2654
2655         /*
2656          * Start actual ANQP operation from eloop call to make sure the loop
2657          * does not end up using excessive recursion.
2658          */
2659         eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2660 }
2661
2662
2663 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2664 {
2665         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2666                 return 0;
2667
2668         wpa_s->network_select = 0;
2669         wpa_s->fetch_all_anqp = 1;
2670         wpa_s->fetch_osu_info = 0;
2671
2672         interworking_start_fetch_anqp(wpa_s);
2673
2674         return 0;
2675 }
2676
2677
2678 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2679 {
2680         if (!wpa_s->fetch_anqp_in_progress)
2681                 return;
2682
2683         wpa_s->fetch_anqp_in_progress = 0;
2684 }
2685
2686
2687 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2688                   u16 info_ids[], size_t num_ids, u32 subtypes)
2689 {
2690         struct wpabuf *buf;
2691         struct wpabuf *hs20_buf = NULL;
2692         int ret = 0;
2693         int freq;
2694         struct wpa_bss *bss;
2695         int res;
2696
2697         bss = wpa_bss_get_bssid(wpa_s, dst);
2698         if (!bss) {
2699                 wpa_printf(MSG_WARNING,
2700                            "ANQP: Cannot send query to unknown BSS "
2701                            MACSTR, MAC2STR(dst));
2702                 return -1;
2703         }
2704
2705         wpa_bss_anqp_unshare_alloc(bss);
2706         freq = bss->freq;
2707
2708         wpa_msg(wpa_s, MSG_DEBUG,
2709                 "ANQP: Query Request to " MACSTR " for %u id(s)",
2710                 MAC2STR(dst), (unsigned int) num_ids);
2711
2712 #ifdef CONFIG_HS20
2713         if (subtypes != 0) {
2714                 hs20_buf = wpabuf_alloc(100);
2715                 if (hs20_buf == NULL)
2716                         return -1;
2717                 hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf);
2718         }
2719 #endif /* CONFIG_HS20 */
2720
2721         buf = anqp_build_req(info_ids, num_ids, hs20_buf);
2722         wpabuf_free(hs20_buf);
2723         if (buf == NULL)
2724                 return -1;
2725
2726         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2727         if (res < 0) {
2728                 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2729                 wpabuf_free(buf);
2730                 ret = -1;
2731         } else {
2732                 wpa_msg(wpa_s, MSG_DEBUG,
2733                         "ANQP: Query started with dialog token %u", res);
2734         }
2735
2736         return ret;
2737 }
2738
2739
2740 static void anqp_add_extra(struct wpa_supplicant *wpa_s,
2741                            struct wpa_bss_anqp *anqp, u16 info_id,
2742                            const u8 *data, size_t slen)
2743 {
2744         struct wpa_bss_anqp_elem *tmp, *elem = NULL;
2745
2746         if (!anqp)
2747                 return;
2748
2749         dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem,
2750                          list) {
2751                 if (tmp->infoid == info_id) {
2752                         elem = tmp;
2753                         break;
2754                 }
2755         }
2756
2757         if (!elem) {
2758                 elem = os_zalloc(sizeof(*elem));
2759                 if (!elem)
2760                         return;
2761                 elem->infoid = info_id;
2762                 dl_list_add(&anqp->anqp_elems, &elem->list);
2763         } else {
2764                 wpabuf_free(elem->payload);
2765         }
2766
2767         elem->payload = wpabuf_alloc_copy(data, slen);
2768         if (!elem->payload) {
2769                 dl_list_del(&elem->list);
2770                 os_free(elem);
2771         }
2772 }
2773
2774
2775 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2776                                             struct wpa_bss *bss, const u8 *sa,
2777                                             u16 info_id,
2778                                             const u8 *data, size_t slen)
2779 {
2780         const u8 *pos = data;
2781         struct wpa_bss_anqp *anqp = NULL;
2782 #ifdef CONFIG_HS20
2783         u8 type;
2784 #endif /* CONFIG_HS20 */
2785
2786         if (bss)
2787                 anqp = bss->anqp;
2788
2789         switch (info_id) {
2790         case ANQP_CAPABILITY_LIST:
2791                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2792                         " ANQP Capability list", MAC2STR(sa));
2793                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list",
2794                                   pos, slen);
2795                 if (anqp) {
2796                         wpabuf_free(anqp->capability_list);
2797                         anqp->capability_list = wpabuf_alloc_copy(pos, slen);
2798                 }
2799                 break;
2800         case ANQP_VENUE_NAME:
2801                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2802                         " Venue Name", MAC2STR(sa));
2803                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2804                 if (anqp) {
2805                         wpabuf_free(anqp->venue_name);
2806                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2807                 }
2808                 break;
2809         case ANQP_NETWORK_AUTH_TYPE:
2810                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2811                         " Network Authentication Type information",
2812                         MAC2STR(sa));
2813                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2814                                   "Type", pos, slen);
2815                 if (anqp) {
2816                         wpabuf_free(anqp->network_auth_type);
2817                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2818                 }
2819                 break;
2820         case ANQP_ROAMING_CONSORTIUM:
2821                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2822                         " Roaming Consortium list", MAC2STR(sa));
2823                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2824                                   pos, slen);
2825                 if (anqp) {
2826                         wpabuf_free(anqp->roaming_consortium);
2827                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2828                 }
2829                 break;
2830         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2831                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2832                         " IP Address Type Availability information",
2833                         MAC2STR(sa));
2834                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2835                             pos, slen);
2836                 if (anqp) {
2837                         wpabuf_free(anqp->ip_addr_type_availability);
2838                         anqp->ip_addr_type_availability =
2839                                 wpabuf_alloc_copy(pos, slen);
2840                 }
2841                 break;
2842         case ANQP_NAI_REALM:
2843                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2844                         " NAI Realm list", MAC2STR(sa));
2845                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2846                 if (anqp) {
2847                         wpabuf_free(anqp->nai_realm);
2848                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2849                 }
2850                 break;
2851         case ANQP_3GPP_CELLULAR_NETWORK:
2852                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2853                         " 3GPP Cellular Network information", MAC2STR(sa));
2854                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2855                                   pos, slen);
2856                 if (anqp) {
2857                         wpabuf_free(anqp->anqp_3gpp);
2858                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2859                 }
2860                 break;
2861         case ANQP_DOMAIN_NAME:
2862                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2863                         " Domain Name list", MAC2STR(sa));
2864                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2865                 if (anqp) {
2866                         wpabuf_free(anqp->domain_name);
2867                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2868                 }
2869                 break;
2870         case ANQP_VENDOR_SPECIFIC:
2871                 if (slen < 3)
2872                         return;
2873
2874                 switch (WPA_GET_BE24(pos)) {
2875 #ifdef CONFIG_HS20
2876                 case OUI_WFA:
2877                         pos += 3;
2878                         slen -= 3;
2879
2880                         if (slen < 1)
2881                                 return;
2882                         type = *pos++;
2883                         slen--;
2884
2885                         switch (type) {
2886                         case HS20_ANQP_OUI_TYPE:
2887                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2888                                                              pos, slen);
2889                                 break;
2890                         default:
2891                                 wpa_msg(wpa_s, MSG_DEBUG,
2892                                         "HS20: Unsupported ANQP vendor type %u",
2893                                         type);
2894                                 break;
2895                         }
2896                         break;
2897 #endif /* CONFIG_HS20 */
2898                 default:
2899                         wpa_msg(wpa_s, MSG_DEBUG,
2900                                 "Interworking: Unsupported vendor-specific ANQP OUI %06x",
2901                                 WPA_GET_BE24(pos));
2902                         return;
2903                 }
2904                 break;
2905         default:
2906                 wpa_msg(wpa_s, MSG_DEBUG,
2907                         "Interworking: Unsupported ANQP Info ID %u", info_id);
2908                 anqp_add_extra(wpa_s, anqp, info_id, data, slen);
2909                 break;
2910         }
2911 }
2912
2913
2914 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2915                   enum gas_query_result result,
2916                   const struct wpabuf *adv_proto,
2917                   const struct wpabuf *resp, u16 status_code)
2918 {
2919         struct wpa_supplicant *wpa_s = ctx;
2920         const u8 *pos;
2921         const u8 *end;
2922         u16 info_id;
2923         u16 slen;
2924         struct wpa_bss *bss = NULL, *tmp;
2925         const char *anqp_result = "SUCCESS";
2926
2927         wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2928                    " dialog_token=%u result=%d status_code=%u",
2929                    MAC2STR(dst), dialog_token, result, status_code);
2930         if (result != GAS_QUERY_SUCCESS) {
2931 #ifdef CONFIG_HS20
2932                 if (wpa_s->fetch_osu_icon_in_progress)
2933                         hs20_icon_fetch_failed(wpa_s);
2934 #endif /* CONFIG_HS20 */
2935                 anqp_result = "FAILURE";
2936                 goto out;
2937         }
2938
2939         pos = wpabuf_head(adv_proto);
2940         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2941             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2942                 wpa_msg(wpa_s, MSG_DEBUG,
2943                         "ANQP: Unexpected Advertisement Protocol in response");
2944 #ifdef CONFIG_HS20
2945                 if (wpa_s->fetch_osu_icon_in_progress)
2946                         hs20_icon_fetch_failed(wpa_s);
2947 #endif /* CONFIG_HS20 */
2948                 anqp_result = "INVALID_FRAME";
2949                 goto out;
2950         }
2951
2952         /*
2953          * If possible, select the BSS entry based on which BSS entry was used
2954          * for the request. This can help in cases where multiple BSS entries
2955          * may exist for the same AP.
2956          */
2957         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2958                 if (tmp == wpa_s->interworking_gas_bss &&
2959                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2960                         bss = tmp;
2961                         break;
2962                 }
2963         }
2964         if (bss == NULL)
2965                 bss = wpa_bss_get_bssid(wpa_s, dst);
2966
2967         pos = wpabuf_head(resp);
2968         end = pos + wpabuf_len(resp);
2969
2970         while (pos < end) {
2971                 unsigned int left = end - pos;
2972
2973                 if (left < 4) {
2974                         wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
2975                         anqp_result = "INVALID_FRAME";
2976                         goto out_parse_done;
2977                 }
2978                 info_id = WPA_GET_LE16(pos);
2979                 pos += 2;
2980                 slen = WPA_GET_LE16(pos);
2981                 pos += 2;
2982                 left -= 4;
2983                 if (left < slen) {
2984                         wpa_msg(wpa_s, MSG_DEBUG,
2985                                 "ANQP: Invalid element length for Info ID %u",
2986                                 info_id);
2987                         anqp_result = "INVALID_FRAME";
2988                         goto out_parse_done;
2989                 }
2990                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2991                                                 slen);
2992                 pos += slen;
2993         }
2994
2995 out_parse_done:
2996 #ifdef CONFIG_HS20
2997         hs20_notify_parse_done(wpa_s);
2998 #endif /* CONFIG_HS20 */
2999 out:
3000         wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
3001                 MAC2STR(dst), anqp_result);
3002 }
3003
3004
3005 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
3006                                           struct wpa_scan_results *scan_res)
3007 {
3008         wpa_msg(wpa_s, MSG_DEBUG,
3009                 "Interworking: Scan results available - start ANQP fetch");
3010         interworking_start_fetch_anqp(wpa_s);
3011 }
3012
3013
3014 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
3015                         int *freqs)
3016 {
3017         interworking_stop_fetch_anqp(wpa_s);
3018         wpa_s->network_select = 1;
3019         wpa_s->auto_network_select = 0;
3020         wpa_s->auto_select = !!auto_select;
3021         wpa_s->fetch_all_anqp = 0;
3022         wpa_s->fetch_osu_info = 0;
3023         wpa_msg(wpa_s, MSG_DEBUG,
3024                 "Interworking: Start scan for network selection");
3025         wpa_s->scan_res_handler = interworking_scan_res_handler;
3026         wpa_s->normal_scans = 0;
3027         wpa_s->scan_req = MANUAL_SCAN_REQ;
3028         os_free(wpa_s->manual_scan_freqs);
3029         wpa_s->manual_scan_freqs = freqs;
3030         wpa_s->after_wps = 0;
3031         wpa_s->known_wps_freq = 0;
3032         wpa_supplicant_req_scan(wpa_s, 0, 0);
3033
3034         return 0;
3035 }
3036
3037
3038 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
3039                         enum gas_query_result result,
3040                         const struct wpabuf *adv_proto,
3041                         const struct wpabuf *resp, u16 status_code)
3042 {
3043         struct wpa_supplicant *wpa_s = ctx;
3044         struct wpabuf *n;
3045
3046         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
3047                 " dialog_token=%d status_code=%d resp_len=%d",
3048                 MAC2STR(addr), dialog_token, status_code,
3049                 resp ? (int) wpabuf_len(resp) : -1);
3050         if (!resp)
3051                 return;
3052
3053         n = wpabuf_dup(resp);
3054         if (n == NULL)
3055                 return;
3056         wpabuf_free(wpa_s->prev_gas_resp);
3057         wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
3058         os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
3059         wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
3060         wpa_s->last_gas_resp = n;
3061         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
3062         wpa_s->last_gas_dialog_token = dialog_token;
3063 }
3064
3065
3066 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
3067                      const struct wpabuf *adv_proto,
3068                      const struct wpabuf *query)
3069 {
3070         struct wpabuf *buf;
3071         int ret = 0;
3072         int freq;
3073         struct wpa_bss *bss;
3074         int res;
3075         size_t len;
3076         u8 query_resp_len_limit = 0;
3077
3078         freq = wpa_s->assoc_freq;
3079         bss = wpa_bss_get_bssid(wpa_s, dst);
3080         if (bss)
3081                 freq = bss->freq;
3082         if (freq <= 0)
3083                 return -1;
3084
3085         wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3086                 MAC2STR(dst), freq);
3087         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3088         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3089
3090         len = 3 + wpabuf_len(adv_proto) + 2;
3091         if (query)
3092                 len += wpabuf_len(query);
3093         buf = gas_build_initial_req(0, len);
3094         if (buf == NULL)
3095                 return -1;
3096
3097         /* Advertisement Protocol IE */
3098         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3099         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3100         wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3101         wpabuf_put_buf(buf, adv_proto);
3102
3103         /* GAS Query */
3104         if (query) {
3105                 wpabuf_put_le16(buf, wpabuf_len(query));
3106                 wpabuf_put_buf(buf, query);
3107         } else
3108                 wpabuf_put_le16(buf, 0);
3109
3110         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3111         if (res < 0) {
3112                 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3113                 wpabuf_free(buf);
3114                 ret = -1;
3115         } else
3116                 wpa_msg(wpa_s, MSG_DEBUG,
3117                         "GAS: Query started with dialog token %u", res);
3118
3119         return ret;
3120 }