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