wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
   4  * Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
   5  *
   6  * This software may be distributed under the terms of the BSD license.
   7  * See README for more details.
   8  */
   9
  10 #include "includes.h"
  11
  12 #include "common.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/gas.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "utils/pcsc_funcs.h"
  17 #include "utils/eloop.h"
  18 #include "drivers/driver.h"
  19 #include "eap_common/eap_defs.h"
  20 #include "eap_peer/eap.h"
  21 #include "eap_peer/eap_methods.h"
  22 #include "eapol_supp/eapol_supp_sm.h"
  23 #include "rsn_supp/wpa.h"
  24 #include "wpa_supplicant_i.h"
  25 #include "config.h"
  26 #include "config_ssid.h"
  27 #include "bss.h"
  28 #include "scan.h"
  29 #include "notify.h"
  30 #include "gas_query.h"
  31 #include "hs20_supplicant.h"
  32 #include "interworking.h"
  33
  34
  35 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  36 #define INTERWORKING_3GPP
  37 #else
  38 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  39 #define INTERWORKING_3GPP
  40 #else
  41 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  42 #define INTERWORKING_3GPP
  43 #endif
  44 #endif
  45 #endif
  46
  47 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  48 static struct wpa_cred * interworking_credentials_available_realm(
  49         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
  50         int *excluded);
  51 static struct wpa_cred * interworking_credentials_available_3gpp(
  52         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
  53         int *excluded);
  54
  55
  56 static int cred_prio_cmp(const struct wpa_cred *a, const struct wpa_cred *b)
  57 {
  58         if (a->priority > b->priority)
  59                 return 1;
  60         if (a->priority < b->priority)
  61                 return -1;
  62         if (a->provisioning_sp == NULL || b->provisioning_sp == NULL ||
  63             os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0)
  64                 return 0;
  65         if (a->sp_priority < b->sp_priority)
  66                 return 1;
  67         if (a->sp_priority > b->sp_priority)
  68                 return -1;
  69         return 0;
  70 }
  71
  72
  73 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  74 {
  75         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  76                 wpa_supplicant_cancel_sched_scan(wpa_s);
  77                 wpa_supplicant_deauthenticate(wpa_s,
  78                                               WLAN_REASON_DEAUTH_LEAVING);
  79         }
  80         wpa_s->disconnected = 0;
  81         wpa_s->reassociate = 1;
  82
  83         if (wpa_supplicant_fast_associate(wpa_s) >= 0)
  84                 return;
  85
  86         wpa_supplicant_req_scan(wpa_s, 0, 0);
  87 }
  88
  89
  90 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  91                                       struct wpabuf *extra)
  92 {
  93         struct wpabuf *buf;
  94         size_t i;
  95         u8 *len_pos;
  96
  97         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  98                                          (extra ? wpabuf_len(extra) : 0));
  99         if (buf == NULL)
 100                 return NULL;
 101
 102         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
 103         for (i = 0; i < num_ids; i++)
 104                 wpabuf_put_le16(buf, info_ids[i]);
 105         gas_anqp_set_element_len(buf, len_pos);
 106         if (extra)
 107                 wpabuf_put_buf(buf, extra);
 108
 109         gas_anqp_set_len(buf);
 110
 111         return buf;
 112 }
 113
 114
 115 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
 116                                       u8 dialog_token,
 117                                       enum gas_query_result result,
 118                                       const struct wpabuf *adv_proto,
 119                                       const struct wpabuf *resp,
 120                                       u16 status_code)
 121 {
 122         struct wpa_supplicant *wpa_s = ctx;
 123
 124         wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
 125                    " dialog_token=%u result=%d status_code=%u",
 126                    MAC2STR(dst), dialog_token, result, status_code);
 127         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 128                      status_code);
 129         interworking_next_anqp_fetch(wpa_s);
 130 }
 131
 132
 133 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 134 {
 135         struct wpa_cred *cred;
 136
 137         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 138                 if (cred->roaming_consortium_len)
 139                         return 1;
 140                 if (cred->required_roaming_consortium_len)
 141                         return 1;
 142         }
 143         return 0;
 144 }
 145
 146
 147 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 148 {
 149         struct wpa_cred *cred;
 150
 151         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 152                 if (cred->pcsc || cred->imsi)
 153                         return 1;
 154         }
 155         return 0;
 156 }
 157
 158
 159 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 160 {
 161         struct wpa_cred *cred;
 162
 163         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 164                 if (cred->pcsc || cred->imsi)
 165                         continue;
 166                 if (!cred->eap_method)
 167                         return 1;
 168                 if (cred->realm && cred->roaming_consortium_len == 0)
 169                         return 1;
 170         }
 171         return 0;
 172 }
 173
 174
 175 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 176 {
 177         struct wpa_cred *cred;
 178
 179         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 180                 if (cred->domain || cred->pcsc || cred->imsi ||
 181                     cred->roaming_partner)
 182                         return 1;
 183         }
 184         return 0;
 185 }
 186
 187
 188 #ifdef CONFIG_HS20
 189
 190 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
 191 {
 192         struct wpa_cred *cred;
 193
 194         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 195                 if (cred->min_dl_bandwidth_home ||
 196                     cred->min_ul_bandwidth_home ||
 197                     cred->min_dl_bandwidth_roaming ||
 198                     cred->min_ul_bandwidth_roaming)
 199                         return 1;
 200         }
 201         return 0;
 202 }
 203
 204
 205 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
 206 {
 207         struct wpa_cred *cred;
 208
 209         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 210                 if (cred->num_req_conn_capab)
 211                         return 1;
 212         }
 213         return 0;
 214 }
 215
 216 #endif /* CONFIG_HS20 */
 217
 218
 219 static int additional_roaming_consortiums(struct wpa_bss *bss)
 220 {
 221         const u8 *ie;
 222         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 223         if (ie == NULL || ie[1] == 0)
 224                 return 0;
 225         return ie[2]; /* Number of ANQP OIs */
 226 }
 227
 228
 229 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 230 {
 231         struct wpa_supplicant *wpa_s = eloop_ctx;
 232         interworking_next_anqp_fetch(wpa_s);
 233 }
 234
 235
 236 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 237                                       struct wpa_bss *bss)
 238 {
 239         struct wpabuf *buf;
 240         int ret = 0;
 241         int res;
 242         u16 info_ids[8];
 243         size_t num_info_ids = 0;
 244         struct wpabuf *extra = NULL;
 245         int all = wpa_s->fetch_all_anqp;
 246
 247         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 248                    MAC2STR(bss->bssid));
 249         wpa_s->interworking_gas_bss = bss;
 250
 251         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 252         if (all) {
 253                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 254                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 255         }
 256         if (all || (cred_with_roaming_consortium(wpa_s) &&
 257                     additional_roaming_consortiums(bss)))
 258                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 259         if (all)
 260                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 261         if (all || cred_with_nai_realm(wpa_s))
 262                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 263         if (all || cred_with_3gpp(wpa_s))
 264                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 265         if (all || cred_with_domain(wpa_s))
 266                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 267         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 268                     (u8 *) info_ids, num_info_ids * 2);
 269
 270 #ifdef CONFIG_HS20
 271         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 272                 u8 *len_pos;
 273
 274                 extra = wpabuf_alloc(100);
 275                 if (!extra)
 276                         return -1;
 277
 278                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 279                 wpabuf_put_be24(extra, OUI_WFA);
 280                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 281                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 282                 wpabuf_put_u8(extra, 0); /* Reserved */
 283                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 284                 if (all)
 285                         wpabuf_put_u8(extra,
 286                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 287                 if (all || cred_with_min_backhaul(wpa_s))
 288                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 289                 if (all || cred_with_conn_capab(wpa_s))
 290                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 291                 if (all)
 292                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 293                 if (all)
 294                         wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
 295                 gas_anqp_set_element_len(extra, len_pos);
 296         }
 297 #endif /* CONFIG_HS20 */
 298
 299         buf = anqp_build_req(info_ids, num_info_ids, extra);
 300         wpabuf_free(extra);
 301         if (buf == NULL)
 302                 return -1;
 303
 304         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 305                             interworking_anqp_resp_cb, wpa_s);
 306         if (res < 0) {
 307                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 308                 wpabuf_free(buf);
 309                 ret = -1;
 310                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 311                                        NULL);
 312         } else
 313                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 314                            "%u", res);
 315
 316         return ret;
 317 }
 318
 319
 320 struct nai_realm_eap {
 321         u8 method;
 322         u8 inner_method;
 323         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 324         u8 cred_type;
 325         u8 tunneled_cred_type;
 326 };
 327
 328 struct nai_realm {
 329         u8 encoding;
 330         char *realm;
 331         u8 eap_count;
 332         struct nai_realm_eap *eap;
 333 };
 334
 335
 336 static void nai_realm_free(struct nai_realm *realms, u16 count)
 337 {
 338         u16 i;
 339
 340         if (realms == NULL)
 341                 return;
 342         for (i = 0; i < count; i++) {
 343                 os_free(realms[i].eap);
 344                 os_free(realms[i].realm);
 345         }
 346         os_free(realms);
 347 }
 348
 349
 350 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 351                                       const u8 *end)
 352 {
 353         u8 elen, auth_count, a;
 354         const u8 *e_end;
 355
 356         if (pos + 3 > end) {
 357                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 358                 return NULL;
 359         }
 360
 361         elen = *pos++;
 362         if (pos + elen > end || elen < 2) {
 363                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 364                 return NULL;
 365         }
 366         e_end = pos + elen;
 367         e->method = *pos++;
 368         auth_count = *pos++;
 369         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 370                    elen, e->method, auth_count);
 371
 372         for (a = 0; a < auth_count; a++) {
 373                 u8 id, len;
 374
 375                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 376                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 377                                    "Parameter subfield");
 378                         return NULL;
 379                 }
 380
 381                 id = *pos++;
 382                 len = *pos++;
 383
 384                 switch (id) {
 385                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 386                         if (len < 1)
 387                                 break;
 388                         e->inner_non_eap = *pos;
 389                         if (e->method != EAP_TYPE_TTLS)
 390                                 break;
 391                         switch (*pos) {
 392                         case NAI_REALM_INNER_NON_EAP_PAP:
 393                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 394                                 break;
 395                         case NAI_REALM_INNER_NON_EAP_CHAP:
 396                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 397                                 break;
 398                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 399                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 400                                 break;
 401                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 402                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 403                                 break;
 404                         }
 405                         break;
 406                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 407                         if (len < 1)
 408                                 break;
 409                         e->inner_method = *pos;
 410                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 411                                    e->inner_method);
 412                         break;
 413                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 414                         if (len < 1)
 415                                 break;
 416                         e->cred_type = *pos;
 417                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 418                                    e->cred_type);
 419                         break;
 420                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 421                         if (len < 1)
 422                                 break;
 423                         e->tunneled_cred_type = *pos;
 424                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 425                                    "Type: %u", e->tunneled_cred_type);
 426                         break;
 427                 default:
 428                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 429                                    "Parameter: id=%u len=%u", id, len);
 430                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 431                                     "Value", pos, len);
 432                         break;
 433                 }
 434
 435                 pos += len;
 436         }
 437
 438         return e_end;
 439 }
 440
 441
 442 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 443                                         const u8 *end)
 444 {
 445         u16 len;
 446         const u8 *f_end;
 447         u8 realm_len, e;
 448
 449         if (end - pos < 4) {
 450                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 451                            "fixed fields");
 452                 return NULL;
 453         }
 454
 455         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 456         pos += 2;
 457         if (pos + len > end || len < 3) {
 458                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 459                            "(len=%u; left=%u)",
 460                            len, (unsigned int) (end - pos));
 461                 return NULL;
 462         }
 463         f_end = pos + len;
 464
 465         r->encoding = *pos++;
 466         realm_len = *pos++;
 467         if (pos + realm_len > f_end) {
 468                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 469                            "(len=%u; left=%u)",
 470                            realm_len, (unsigned int) (f_end - pos));
 471                 return NULL;
 472         }
 473         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 474         r->realm = dup_binstr(pos, realm_len);
 475         if (r->realm == NULL)
 476                 return NULL;
 477         pos += realm_len;
 478
 479         if (pos + 1 > f_end) {
 480                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 481                 return NULL;
 482         }
 483         r->eap_count = *pos++;
 484         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 485         if (pos + r->eap_count * 3 > f_end) {
 486                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 487                 return NULL;
 488         }
 489         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 490         if (r->eap == NULL)
 491                 return NULL;
 492
 493         for (e = 0; e < r->eap_count; e++) {
 494                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 495                 if (pos == NULL)
 496                         return NULL;
 497         }
 498
 499         return f_end;
 500 }
 501
 502
 503 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 504 {
 505         struct nai_realm *realm;
 506         const u8 *pos, *end;
 507         u16 i, num;
 508
 509         if (anqp == NULL || wpabuf_len(anqp) < 2)
 510                 return NULL;
 511
 512         pos = wpabuf_head_u8(anqp);
 513         end = pos + wpabuf_len(anqp);
 514         num = WPA_GET_LE16(pos);
 515         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 516         pos += 2;
 517
 518         if (num * 5 > end - pos) {
 519                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 520                            "enough data (%u octets) for that many realms",
 521                            num, (unsigned int) (end - pos));
 522                 return NULL;
 523         }
 524
 525         realm = os_calloc(num, sizeof(struct nai_realm));
 526         if (realm == NULL)
 527                 return NULL;
 528
 529         for (i = 0; i < num; i++) {
 530                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 531                 if (pos == NULL) {
 532                         nai_realm_free(realm, num);
 533                         return NULL;
 534                 }
 535         }
 536
 537         *count = num;
 538         return realm;
 539 }
 540
 541
 542 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 543 {
 544         char *tmp, *pos, *end;
 545         int match = 0;
 546
 547         if (realm->realm == NULL || home_realm == NULL)
 548                 return 0;
 549
 550         if (os_strchr(realm->realm, ';') == NULL)
 551                 return os_strcasecmp(realm->realm, home_realm) == 0;
 552
 553         tmp = os_strdup(realm->realm);
 554         if (tmp == NULL)
 555                 return 0;
 556
 557         pos = tmp;
 558         while (*pos) {
 559                 end = os_strchr(pos, ';');
 560                 if (end)
 561                         *end = '\0';
 562                 if (os_strcasecmp(pos, home_realm) == 0) {
 563                         match = 1;
 564                         break;
 565                 }
 566                 if (end == NULL)
 567                         break;
 568                 pos = end + 1;
 569         }
 570
 571         os_free(tmp);
 572
 573         return match;
 574 }
 575
 576
 577 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 578 {
 579         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 580                 return 0; /* method not supported */
 581
 582         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
 583             eap->method != EAP_TYPE_FAST) {
 584                 /* Only tunneled methods with username/password supported */
 585                 return 0;
 586         }
 587
 588         if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
 589                 if (eap->inner_method &&
 590                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 591                         return 0;
 592                 if (!eap->inner_method &&
 593                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
 594                         return 0;
 595         }
 596
 597         if (eap->method == EAP_TYPE_TTLS) {
 598                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 599                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 600                 if (eap->inner_method &&
 601                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 602                         return 0;
 603                 if (eap->inner_non_eap &&
 604                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 605                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 606                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 607                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 608                         return 0;
 609         }
 610
 611         if (eap->inner_method &&
 612             eap->inner_method != EAP_TYPE_GTC &&
 613             eap->inner_method != EAP_TYPE_MSCHAPV2)
 614                 return 0;
 615
 616         return 1;
 617 }
 618
 619
 620 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 621 {
 622         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 623                 return 0; /* method not supported */
 624
 625         if (eap->method != EAP_TYPE_TLS) {
 626                 /* Only EAP-TLS supported for credential authentication */
 627                 return 0;
 628         }
 629
 630         return 1;
 631 }
 632
 633
 634 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 635                                                  struct nai_realm *realm)
 636 {
 637         u8 e;
 638
 639         if (cred == NULL ||
 640             cred->username == NULL ||
 641             cred->username[0] == '\0' ||
 642             ((cred->password == NULL ||
 643               cred->password[0] == '\0') &&
 644              (cred->private_key == NULL ||
 645               cred->private_key[0] == '\0')))
 646                 return NULL;
 647
 648         for (e = 0; e < realm->eap_count; e++) {
 649                 struct nai_realm_eap *eap = &realm->eap[e];
 650                 if (cred->password && cred->password[0] &&
 651                     nai_realm_cred_username(eap))
 652                         return eap;
 653                 if (cred->private_key && cred->private_key[0] &&
 654                     nai_realm_cred_cert(eap))
 655                         return eap;
 656         }
 657
 658         return NULL;
 659 }
 660
 661
 662 #ifdef INTERWORKING_3GPP
 663
 664 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 665 {
 666         u8 plmn[3], plmn2[3];
 667         const u8 *pos, *end;
 668         u8 udhl;
 669
 670         /*
 671          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 672          * operator is allowed to include only two digits of the MNC, so allow
 673          * matches based on both two and three digit MNC assumptions. Since some
 674          * SIM/USIM cards may not expose MNC length conveniently, we may be
 675          * provided the default MNC length 3 here and as such, checking with MNC
 676          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 677          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 678          * with otherwise matching values would not be good idea in general, so
 679          * this should not result in selecting incorrect networks.
 680          */
 681         /* Match with 3 digit MNC */
 682         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 683         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 684         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 685         /* Match with 2 digit MNC */
 686         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 687         plmn2[1] = (imsi[2] - '0') | 0xf0;
 688         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 689
 690         if (anqp == NULL)
 691                 return 0;
 692         pos = wpabuf_head_u8(anqp);
 693         end = pos + wpabuf_len(anqp);
 694         if (pos + 2 > end)
 695                 return 0;
 696         if (*pos != 0) {
 697                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 698                 return 0;
 699         }
 700         pos++;
 701         udhl = *pos++;
 702         if (pos + udhl > end) {
 703                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 704                 return 0;
 705         }
 706         end = pos + udhl;
 707
 708         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 709                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 710                    imsi, mnc_len);
 711
 712         while (pos + 2 <= end) {
 713                 u8 iei, len;
 714                 const u8 *l_end;
 715                 iei = *pos++;
 716                 len = *pos++ & 0x7f;
 717                 if (pos + len > end)
 718                         break;
 719                 l_end = pos + len;
 720
 721                 if (iei == 0 && len > 0) {
 722                         /* PLMN List */
 723                         u8 num, i;
 724                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 725                                     pos, len);
 726                         num = *pos++;
 727                         for (i = 0; i < num; i++) {
 728                                 if (pos + 3 > l_end)
 729                                         break;
 730                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 731                                     os_memcmp(pos, plmn2, 3) == 0)
 732                                         return 1; /* Found matching PLMN */
 733                                 pos += 3;
 734                         }
 735                 } else {
 736                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 737                                     pos, len);
 738                 }
 739
 740                 pos = l_end;
 741         }
 742
 743         return 0;
 744 }
 745
 746
 747 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 748                           size_t mnc_len, char prefix)
 749 {
 750         const char *sep, *msin;
 751         char *end, *pos;
 752         size_t msin_len, plmn_len;
 753
 754         /*
 755          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 756          * Root NAI:
 757          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 758          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 759          */
 760
 761         if (imsi == NULL || os_strlen(imsi) > 16) {
 762                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 763                 return -1;
 764         }
 765         sep = os_strchr(imsi, '-');
 766         if (sep) {
 767                 plmn_len = sep - imsi;
 768                 msin = sep + 1;
 769         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 770                 plmn_len = 3 + mnc_len;
 771                 msin = imsi + plmn_len;
 772         } else
 773                 return -1;
 774         if (plmn_len != 5 && plmn_len != 6)
 775                 return -1;
 776         msin_len = os_strlen(msin);
 777
 778         pos = nai;
 779         end = nai + nai_len;
 780         if (prefix)
 781                 *pos++ = prefix;
 782         os_memcpy(pos, imsi, plmn_len);
 783         pos += plmn_len;
 784         os_memcpy(pos, msin, msin_len);
 785         pos += msin_len;
 786         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 787         if (plmn_len == 5) {
 788                 *pos++ = '0';
 789                 *pos++ = imsi[3];
 790                 *pos++ = imsi[4];
 791         } else {
 792                 *pos++ = imsi[3];
 793                 *pos++ = imsi[4];
 794                 *pos++ = imsi[5];
 795         }
 796         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 797                            imsi[0], imsi[1], imsi[2]);
 798
 799         return 0;
 800 }
 801
 802
 803 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 804 {
 805         char nai[100];
 806         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 807                 return -1;
 808         return wpa_config_set_quoted(ssid, "identity", nai);
 809 }
 810
 811 #endif /* INTERWORKING_3GPP */
 812
 813
 814 static int already_connected(struct wpa_supplicant *wpa_s,
 815                              struct wpa_cred *cred, struct wpa_bss *bss)
 816 {
 817         struct wpa_ssid *ssid;
 818
 819         if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
 820                 return 0;
 821
 822         ssid = wpa_s->current_ssid;
 823         if (ssid->parent_cred != cred)
 824                 return 0;
 825
 826         if (ssid->ssid_len != bss->ssid_len ||
 827             os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 828                 return 0;
 829
 830         return 1;
 831 }
 832
 833
 834 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
 835                                      struct wpa_cred *cred,
 836                                      struct wpa_bss *bss)
 837 {
 838         struct wpa_ssid *ssid;
 839
 840         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 841                 if (ssid->parent_cred != cred)
 842                         continue;
 843                 if (ssid->ssid_len != bss->ssid_len ||
 844                     os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 845                         continue;
 846
 847                 break;
 848         }
 849
 850         if (ssid == NULL)
 851                 return;
 852
 853         wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
 854
 855         if (ssid == wpa_s->current_ssid) {
 856                 wpa_sm_set_config(wpa_s->wpa, NULL);
 857                 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 858                 wpa_supplicant_deauthenticate(wpa_s,
 859                                               WLAN_REASON_DEAUTH_LEAVING);
 860         }
 861
 862         wpas_notify_network_removed(wpa_s, ssid);
 863         wpa_config_remove_network(wpa_s->conf, ssid->id);
 864 }
 865
 866
 867 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 868                                         struct wpa_ssid *ssid)
 869 {
 870         if (wpa_config_set(ssid, "key_mgmt",
 871                            wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 872                            "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0)
 873                 return -1;
 874         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 875                 return -1;
 876         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 877                 return -1;
 878         return 0;
 879 }
 880
 881
 882 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 883                                      struct wpa_cred *cred,
 884                                      struct wpa_bss *bss)
 885 {
 886 #ifdef INTERWORKING_3GPP
 887         struct wpa_ssid *ssid;
 888         int eap_type;
 889         int res;
 890         char prefix;
 891
 892         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 893                 return -1;
 894
 895         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 896                    MAC2STR(bss->bssid));
 897
 898         if (already_connected(wpa_s, cred, bss)) {
 899                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
 900                         MAC2STR(bss->bssid));
 901                 return 0;
 902         }
 903
 904         remove_duplicate_network(wpa_s, cred, bss);
 905
 906         ssid = wpa_config_add_network(wpa_s->conf);
 907         if (ssid == NULL)
 908                 return -1;
 909         ssid->parent_cred = cred;
 910
 911         wpas_notify_network_added(wpa_s, ssid);
 912         wpa_config_set_network_defaults(ssid);
 913         ssid->priority = cred->priority;
 914         ssid->temporary = 1;
 915         ssid->ssid = os_zalloc(bss->ssid_len + 1);
 916         if (ssid->ssid == NULL)
 917                 goto fail;
 918         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 919         ssid->ssid_len = bss->ssid_len;
 920
 921         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 922                 goto fail;
 923
 924         eap_type = EAP_TYPE_SIM;
 925         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 926                 eap_type = EAP_TYPE_AKA;
 927         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
 928                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
 929                     cred->eap_method[0].method == EAP_TYPE_AKA ||
 930                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
 931                         eap_type = cred->eap_method[0].method;
 932         }
 933
 934         switch (eap_type) {
 935         case EAP_TYPE_SIM:
 936                 prefix = '1';
 937                 res = wpa_config_set(ssid, "eap", "SIM", 0);
 938                 break;
 939         case EAP_TYPE_AKA:
 940                 prefix = '0';
 941                 res = wpa_config_set(ssid, "eap", "AKA", 0);
 942                 break;
 943         case EAP_TYPE_AKA_PRIME:
 944                 prefix = '6';
 945                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
 946                 break;
 947         default:
 948                 res = -1;
 949                 break;
 950         }
 951         if (res < 0) {
 952                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
 953                            eap_type);
 954                 goto fail;
 955         }
 956
 957         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
 958                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 959                 goto fail;
 960         }
 961
 962         if (cred->milenage && cred->milenage[0]) {
 963                 if (wpa_config_set_quoted(ssid, "password",
 964                                           cred->milenage) < 0)
 965                         goto fail;
 966         } else if (cred->pcsc) {
 967                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 968                         goto fail;
 969                 if (wpa_s->conf->pcsc_pin &&
 970                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 971                     < 0)
 972                         goto fail;
 973         }
 974
 975         if (cred->password && cred->password[0] &&
 976             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 977                 goto fail;
 978
 979         wpa_s->next_ssid = ssid;
 980         wpa_config_update_prio_list(wpa_s->conf);
 981         interworking_reconnect(wpa_s);
 982
 983         return 0;
 984
 985 fail:
 986         wpas_notify_network_removed(wpa_s, ssid);
 987         wpa_config_remove_network(wpa_s->conf, ssid->id);
 988 #endif /* INTERWORKING_3GPP */
 989         return -1;
 990 }
 991
 992
 993 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 994                                             size_t rc_len)
 995 {
 996         const u8 *pos, *end;
 997         u8 lens;
 998
 999         if (ie == NULL)
1000                 return 0;
1001
1002         pos = ie + 2;
1003         end = ie + 2 + ie[1];
1004
1005         /* Roaming Consortium element:
1006          * Number of ANQP OIs
1007          * OI #1 and #2 lengths
1008          * OI #1, [OI #2], [OI #3]
1009          */
1010
1011         if (pos + 2 > end)
1012                 return 0;
1013
1014         pos++; /* skip Number of ANQP OIs */
1015         lens = *pos++;
1016         if (pos + (lens & 0x0f) + (lens >> 4) > end)
1017                 return 0;
1018
1019         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1020                 return 1;
1021         pos += lens & 0x0f;
1022
1023         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1024                 return 1;
1025         pos += lens >> 4;
1026
1027         if (pos < end && (size_t) (end - pos) == rc_len &&
1028             os_memcmp(pos, rc_id, rc_len) == 0)
1029                 return 1;
1030
1031         return 0;
1032 }
1033
1034
1035 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1036                                          const u8 *rc_id, size_t rc_len)
1037 {
1038         const u8 *pos, *end;
1039         u8 len;
1040
1041         if (anqp == NULL)
1042                 return 0;
1043
1044         pos = wpabuf_head(anqp);
1045         end = pos + wpabuf_len(anqp);
1046
1047         /* Set of <OI Length, OI> duples */
1048         while (pos < end) {
1049                 len = *pos++;
1050                 if (pos + len > end)
1051                         break;
1052                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1053                         return 1;
1054                 pos += len;
1055         }
1056
1057         return 0;
1058 }
1059
1060
1061 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1062                                     const u8 *rc_id, size_t rc_len)
1063 {
1064         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1065                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1066 }
1067
1068
1069 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1070 {
1071         const u8 *ie;
1072
1073         if (cred->required_roaming_consortium_len == 0)
1074                 return 0;
1075
1076         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1077
1078         if (ie == NULL &&
1079             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1080                 return 1;
1081
1082         return !roaming_consortium_match(ie,
1083                                          bss->anqp ?
1084                                          bss->anqp->roaming_consortium : NULL,
1085                                          cred->required_roaming_consortium,
1086                                          cred->required_roaming_consortium_len);
1087 }
1088
1089
1090 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1091 {
1092         size_t i;
1093
1094         if (!cred->excluded_ssid)
1095                 return 0;
1096
1097         for (i = 0; i < cred->num_excluded_ssid; i++) {
1098                 struct excluded_ssid *e = &cred->excluded_ssid[i];
1099                 if (bss->ssid_len == e->ssid_len &&
1100                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1101                         return 1;
1102         }
1103
1104         return 0;
1105 }
1106
1107
1108 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1109                                    struct wpa_cred *cred, struct wpa_bss *bss)
1110 {
1111         int res;
1112         unsigned int dl_bandwidth, ul_bandwidth;
1113         const u8 *wan;
1114         u8 wan_info, dl_load, ul_load;
1115         u16 lmd;
1116         u32 ul_speed, dl_speed;
1117
1118         if (!cred->min_dl_bandwidth_home &&
1119             !cred->min_ul_bandwidth_home &&
1120             !cred->min_dl_bandwidth_roaming &&
1121             !cred->min_ul_bandwidth_roaming)
1122                 return 0; /* No bandwidth constraint specified */
1123
1124         if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1125                 return 0; /* No WAN Metrics known - ignore constraint */
1126
1127         wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1128         wan_info = wan[0];
1129         if (wan_info & BIT(3))
1130                 return 1; /* WAN link at capacity */
1131         lmd = WPA_GET_LE16(wan + 11);
1132         if (lmd == 0)
1133                 return 0; /* Downlink/Uplink Load was not measured */
1134         dl_speed = WPA_GET_LE32(wan + 1);
1135         ul_speed = WPA_GET_LE32(wan + 5);
1136         dl_load = wan[9];
1137         ul_load = wan[10];
1138
1139         if (dl_speed >= 0xffffff)
1140                 dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1141         else
1142                 dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1143
1144         if (ul_speed >= 0xffffff)
1145                 ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1146         else
1147                 ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1148
1149         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1150                                         bss->anqp->domain_name : NULL);
1151         if (res > 0) {
1152                 if (cred->min_dl_bandwidth_home > dl_bandwidth)
1153                         return 1;
1154                 if (cred->min_ul_bandwidth_home > ul_bandwidth)
1155                         return 1;
1156         } else {
1157                 if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1158                         return 1;
1159                 if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1160                         return 1;
1161         }
1162
1163         return 0;
1164 }
1165
1166
1167 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1168                                   struct wpa_cred *cred, struct wpa_bss *bss)
1169 {
1170         const u8 *ie;
1171         int res;
1172
1173         if (!cred->max_bss_load)
1174                 return 0; /* No BSS Load constraint specified */
1175
1176         ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1177         if (ie == NULL || ie[1] < 3)
1178                 return 0; /* No BSS Load advertised */
1179
1180         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1181                                         bss->anqp->domain_name : NULL);
1182         if (res <= 0)
1183                 return 0; /* Not a home network */
1184
1185         return ie[4] > cred->max_bss_load;
1186 }
1187
1188
1189 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1190 {
1191         while (pos + 4 <= end) {
1192                 if (pos[0] == proto && pos[3] == 1 /* Open */)
1193                         return 1;
1194                 pos += 4;
1195         }
1196
1197         return 0;
1198 }
1199
1200
1201 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1202                                 u16 port)
1203 {
1204         while (pos + 4 <= end) {
1205                 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1206                     pos[3] == 1 /* Open */)
1207                         return 1;
1208                 pos += 4;
1209         }
1210
1211         return 0;
1212 }
1213
1214
1215 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1216                                    struct wpa_cred *cred, struct wpa_bss *bss)
1217 {
1218         int res;
1219         const u8 *capab, *end;
1220         unsigned int i, j;
1221         int *ports;
1222
1223         if (!cred->num_req_conn_capab)
1224                 return 0; /* No connection capability constraint specified */
1225
1226         if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1227                 return 0; /* No Connection Capability known - ignore constraint
1228                            */
1229
1230         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1231                                         bss->anqp->domain_name : NULL);
1232         if (res > 0)
1233                 return 0; /* No constraint in home network */
1234
1235         capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1236         end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1237
1238         for (i = 0; i < cred->num_req_conn_capab; i++) {
1239                 ports = cred->req_conn_capab_port[i];
1240                 if (!ports) {
1241                         if (!has_proto_match(capab, end,
1242                                              cred->req_conn_capab_proto[i]))
1243                                 return 1;
1244                 } else {
1245                         for (j = 0; ports[j] > -1; j++) {
1246                                 if (!has_proto_port_match(
1247                                             capab, end,
1248                                             cred->req_conn_capab_proto[i],
1249                                             ports[j]))
1250                                         return 1;
1251                         }
1252                 }
1253         }
1254
1255         return 0;
1256 }
1257
1258
1259 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1260         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1261         int *excluded)
1262 {
1263         struct wpa_cred *cred, *selected = NULL;
1264         const u8 *ie;
1265         int is_excluded = 0;
1266
1267         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1268
1269         if (ie == NULL &&
1270             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1271                 return NULL;
1272
1273         if (wpa_s->conf->cred == NULL)
1274                 return NULL;
1275
1276         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1277                 if (cred->roaming_consortium_len == 0)
1278                         continue;
1279
1280                 if (!roaming_consortium_match(ie,
1281                                               bss->anqp ?
1282                                               bss->anqp->roaming_consortium :
1283                                               NULL,
1284                                               cred->roaming_consortium,
1285                                               cred->roaming_consortium_len))
1286                         continue;
1287
1288                 if (cred_no_required_oi_match(cred, bss))
1289                         continue;
1290                 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1291                         continue;
1292                 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1293                         continue;
1294                 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1295                         continue;
1296                 if (cred_excluded_ssid(cred, bss)) {
1297                         if (excluded == NULL)
1298                                 continue;
1299                         if (selected == NULL) {
1300                                 selected = cred;
1301                                 is_excluded = 1;
1302                         }
1303                 } else {
1304                         if (selected == NULL || is_excluded ||
1305                             cred_prio_cmp(selected, cred) < 0) {
1306                                 selected = cred;
1307                                 is_excluded = 0;
1308                         }
1309                 }
1310         }
1311
1312         if (excluded)
1313                 *excluded = is_excluded;
1314
1315         return selected;
1316 }
1317
1318
1319 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1320                                        struct wpa_cred *cred, int ttls)
1321 {
1322         if (cred->eap_method) {
1323                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1324                         cred->eap_method->method == EAP_TYPE_TTLS;
1325
1326                 os_free(ssid->eap.eap_methods);
1327                 ssid->eap.eap_methods =
1328                         os_malloc(sizeof(struct eap_method_type) * 2);
1329                 if (ssid->eap.eap_methods == NULL)
1330                         return -1;
1331                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1332                           sizeof(*cred->eap_method));
1333                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1334                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1335         }
1336
1337         if (ttls && cred->username && cred->username[0]) {
1338                 const char *pos;
1339                 char *anon;
1340                 /* Use anonymous NAI in Phase 1 */
1341                 pos = os_strchr(cred->username, '@');
1342                 if (pos) {
1343                         size_t buflen = 9 + os_strlen(pos) + 1;
1344                         anon = os_malloc(buflen);
1345                         if (anon == NULL)
1346                                 return -1;
1347                         os_snprintf(anon, buflen, "anonymous%s", pos);
1348                 } else if (cred->realm) {
1349                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1350                         anon = os_malloc(buflen);
1351                         if (anon == NULL)
1352                                 return -1;
1353                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1354                 } else {
1355                         anon = os_strdup("anonymous");
1356                         if (anon == NULL)
1357                                 return -1;
1358                 }
1359                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1360                     0) {
1361                         os_free(anon);
1362                         return -1;
1363                 }
1364                 os_free(anon);
1365         }
1366
1367         if (cred->username && cred->username[0] &&
1368             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1369                 return -1;
1370
1371         if (cred->password && cred->password[0]) {
1372                 if (cred->ext_password &&
1373                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1374                         return -1;
1375                 if (!cred->ext_password &&
1376                     wpa_config_set_quoted(ssid, "password", cred->password) <
1377                     0)
1378                         return -1;
1379         }
1380
1381         if (cred->client_cert && cred->client_cert[0] &&
1382             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1383                 return -1;
1384
1385 #ifdef ANDROID
1386         if (cred->private_key &&
1387             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1388                 /* Use OpenSSL engine configuration for Android keystore */
1389                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1390                     wpa_config_set_quoted(ssid, "key_id",
1391                                           cred->private_key + 11) < 0 ||
1392                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1393                         return -1;
1394         } else
1395 #endif /* ANDROID */
1396         if (cred->private_key && cred->private_key[0] &&
1397             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1398                 return -1;
1399
1400         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1401             wpa_config_set_quoted(ssid, "private_key_passwd",
1402                                   cred->private_key_passwd) < 0)
1403                 return -1;
1404
1405         if (cred->phase1) {
1406                 os_free(ssid->eap.phase1);
1407                 ssid->eap.phase1 = os_strdup(cred->phase1);
1408         }
1409         if (cred->phase2) {
1410                 os_free(ssid->eap.phase2);
1411                 ssid->eap.phase2 = os_strdup(cred->phase2);
1412         }
1413
1414         if (cred->ca_cert && cred->ca_cert[0] &&
1415             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1416                 return -1;
1417
1418         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1419             wpa_config_set_quoted(ssid, "domain_suffix_match",
1420                                   cred->domain_suffix_match) < 0)
1421                 return -1;
1422
1423         return 0;
1424 }
1425
1426
1427 static int interworking_connect_roaming_consortium(
1428         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1429         struct wpa_bss *bss)
1430 {
1431         struct wpa_ssid *ssid;
1432
1433         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1434                    "roaming consortium match", MAC2STR(bss->bssid));
1435
1436         if (already_connected(wpa_s, cred, bss)) {
1437                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1438                         MAC2STR(bss->bssid));
1439                 return 0;
1440         }
1441
1442         remove_duplicate_network(wpa_s, cred, bss);
1443
1444         ssid = wpa_config_add_network(wpa_s->conf);
1445         if (ssid == NULL)
1446                 return -1;
1447         ssid->parent_cred = cred;
1448         wpas_notify_network_added(wpa_s, ssid);
1449         wpa_config_set_network_defaults(ssid);
1450         ssid->priority = cred->priority;
1451         ssid->temporary = 1;
1452         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1453         if (ssid->ssid == NULL)
1454                 goto fail;
1455         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1456         ssid->ssid_len = bss->ssid_len;
1457
1458         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1459                 goto fail;
1460
1461         if (cred->eap_method == NULL) {
1462                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1463                            "credential using roaming consortium");
1464                 goto fail;
1465         }
1466
1467         if (interworking_set_eap_params(
1468                     ssid, cred,
1469                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1470                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1471                 goto fail;
1472
1473         wpa_s->next_ssid = ssid;
1474         wpa_config_update_prio_list(wpa_s->conf);
1475         interworking_reconnect(wpa_s);
1476
1477         return 0;
1478
1479 fail:
1480         wpas_notify_network_removed(wpa_s, ssid);
1481         wpa_config_remove_network(wpa_s->conf, ssid->id);
1482         return -1;
1483 }
1484
1485
1486 static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
1487                                        struct wpa_bss *bss, int allow_excluded)
1488 {
1489         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1490         struct wpa_ssid *ssid;
1491         struct nai_realm *realm;
1492         struct nai_realm_eap *eap = NULL;
1493         u16 count, i;
1494         char buf[100];
1495         int excluded = 0, *excl = allow_excluded ? &excluded : NULL;
1496
1497         if (wpa_s->conf->cred == NULL || bss == NULL)
1498                 return -1;
1499         if (disallowed_bssid(wpa_s, bss->bssid) ||
1500             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1501                 wpa_printf(MSG_DEBUG, "Interworking: Reject connection to disallowed BSS "
1502                            MACSTR, MAC2STR(bss->bssid));
1503                 return -1;
1504         }
1505
1506         wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1507                    " for connection (allow_excluded=%d)",
1508                    MAC2STR(bss->bssid), allow_excluded);
1509
1510         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1511                 /*
1512                  * We currently support only HS 2.0 networks and those are
1513                  * required to use WPA2-Enterprise.
1514                  */
1515                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1516                            "RSN");
1517                 return -1;
1518         }
1519
1520         cred_rc = interworking_credentials_available_roaming_consortium(
1521                 wpa_s, bss, 0, excl);
1522         if (cred_rc) {
1523                 wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1524                            "consortium matching credential priority %d "
1525                            "sp_priority %d",
1526                            cred_rc->priority, cred_rc->sp_priority);
1527                 if (allow_excluded && excl && !(*excl))
1528                         excl = NULL;
1529         }
1530
1531         cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1532         if (cred) {
1533                 wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
1534                            "matching credential priority %d sp_priority %d",
1535                            cred->priority, cred->sp_priority);
1536                 if (allow_excluded && excl && !(*excl))
1537                         excl = NULL;
1538         }
1539
1540         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1541                                                             excl);
1542         if (cred_3gpp) {
1543                 wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
1544                            "credential priority %d sp_priority %d",
1545                            cred_3gpp->priority, cred_3gpp->sp_priority);
1546                 if (allow_excluded && excl && !(*excl))
1547                         excl = NULL;
1548         }
1549
1550         if (!cred_rc && !cred && !cred_3gpp) {
1551                 wpa_printf(MSG_DEBUG, "Interworking: No full credential matches - consider options without BW(etc.) limits");
1552                 cred_rc = interworking_credentials_available_roaming_consortium(
1553                         wpa_s, bss, 1, excl);
1554                 if (cred_rc) {
1555                         wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
1556                                    "consortium matching credential priority %d "
1557                                    "sp_priority %d (ignore BW)",
1558                                    cred_rc->priority, cred_rc->sp_priority);
1559                         if (allow_excluded && excl && !(*excl))
1560                                 excl = NULL;
1561                 }
1562
1563                 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1564                                                                 excl);
1565                 if (cred) {
1566                         wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm "
1567                                    "list matching credential priority %d "
1568                                    "sp_priority %d (ignore BW)",
1569                                    cred->priority, cred->sp_priority);
1570                         if (allow_excluded && excl && !(*excl))
1571                                 excl = NULL;
1572                 }
1573
1574                 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1575                                                                     1, excl);
1576                 if (cred_3gpp) {
1577                         wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP "
1578                                    "matching credential priority %d "
1579                                    "sp_priority %d (ignore BW)",
1580                                    cred_3gpp->priority, cred_3gpp->sp_priority);
1581                         if (allow_excluded && excl && !(*excl))
1582                                 excl = NULL;
1583                 }
1584         }
1585
1586         if (cred_rc &&
1587             (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1588             (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1589                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1590                                                                bss);
1591
1592         if (cred_3gpp &&
1593             (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1594                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
1595         }
1596
1597         if (cred == NULL) {
1598                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1599                            "found for " MACSTR, MAC2STR(bss->bssid));
1600                 return -1;
1601         }
1602
1603         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1604                                 &count);
1605         if (realm == NULL) {
1606                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1607                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1608                 return -1;
1609         }
1610
1611         for (i = 0; i < count; i++) {
1612                 if (!nai_realm_match(&realm[i], cred->realm))
1613                         continue;
1614                 eap = nai_realm_find_eap(cred, &realm[i]);
1615                 if (eap)
1616                         break;
1617         }
1618
1619         if (!eap) {
1620                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1621                            "and EAP method found for " MACSTR,
1622                            MAC2STR(bss->bssid));
1623                 nai_realm_free(realm, count);
1624                 return -1;
1625         }
1626
1627         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1628                    MAC2STR(bss->bssid));
1629
1630         if (already_connected(wpa_s, cred, bss)) {
1631                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1632                         MAC2STR(bss->bssid));
1633                 nai_realm_free(realm, count);
1634                 return 0;
1635         }
1636
1637         remove_duplicate_network(wpa_s, cred, bss);
1638
1639         ssid = wpa_config_add_network(wpa_s->conf);
1640         if (ssid == NULL) {
1641                 nai_realm_free(realm, count);
1642                 return -1;
1643         }
1644         ssid->parent_cred = cred;
1645         wpas_notify_network_added(wpa_s, ssid);
1646         wpa_config_set_network_defaults(ssid);
1647         ssid->priority = cred->priority;
1648         ssid->temporary = 1;
1649         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1650         if (ssid->ssid == NULL)
1651                 goto fail;
1652         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1653         ssid->ssid_len = bss->ssid_len;
1654
1655         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1656                 goto fail;
1657
1658         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1659                                                      eap->method), 0) < 0)
1660                 goto fail;
1661
1662         switch (eap->method) {
1663         case EAP_TYPE_TTLS:
1664                 if (eap->inner_method) {
1665                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1666                                     eap_get_name(EAP_VENDOR_IETF,
1667                                                  eap->inner_method));
1668                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1669                                 goto fail;
1670                         break;
1671                 }
1672                 switch (eap->inner_non_eap) {
1673                 case NAI_REALM_INNER_NON_EAP_PAP:
1674                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1675                             0)
1676                                 goto fail;
1677                         break;
1678                 case NAI_REALM_INNER_NON_EAP_CHAP:
1679                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1680                             < 0)
1681                                 goto fail;
1682                         break;
1683                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1684                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1685                                            0) < 0)
1686                                 goto fail;
1687                         break;
1688                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1689                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1690                                            0) < 0)
1691                                 goto fail;
1692                         break;
1693                 default:
1694                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1695                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1696                                            0) < 0)
1697                                 goto fail;
1698                         break;
1699                 }
1700                 break;
1701         case EAP_TYPE_PEAP:
1702         case EAP_TYPE_FAST:
1703                 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1704                                    0) < 0)
1705                         goto fail;
1706                 if (wpa_config_set(ssid, "pac_file",
1707                                    "\"blob://pac_interworking\"", 0) < 0)
1708                         goto fail;
1709                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1710                             eap_get_name(EAP_VENDOR_IETF,
1711                                          eap->inner_method ?
1712                                          eap->inner_method :
1713                                          EAP_TYPE_MSCHAPV2));
1714                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1715                         goto fail;
1716                 break;
1717         case EAP_TYPE_TLS:
1718                 break;
1719         }
1720
1721         if (interworking_set_eap_params(ssid, cred,
1722                                         eap->method == EAP_TYPE_TTLS) < 0)
1723                 goto fail;
1724
1725         nai_realm_free(realm, count);
1726
1727         wpa_s->next_ssid = ssid;
1728         wpa_config_update_prio_list(wpa_s->conf);
1729         interworking_reconnect(wpa_s);
1730
1731         return 0;
1732
1733 fail:
1734         wpas_notify_network_removed(wpa_s, ssid);
1735         wpa_config_remove_network(wpa_s->conf, ssid->id);
1736         nai_realm_free(realm, count);
1737         return -1;
1738 }
1739
1740
1741 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1742 {
1743         return interworking_connect_helper(wpa_s, bss, 1);
1744 }
1745
1746
1747 static struct wpa_cred * interworking_credentials_available_3gpp(
1748         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1749         int *excluded)
1750 {
1751         struct wpa_cred *selected = NULL;
1752 #ifdef INTERWORKING_3GPP
1753         struct wpa_cred *cred;
1754         int ret;
1755         int is_excluded = 0;
1756
1757         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1758                 return NULL;
1759
1760 #ifdef CONFIG_EAP_PROXY
1761         if (!wpa_s->imsi[0]) {
1762                 size_t len;
1763                 wpa_printf(MSG_DEBUG, "Interworking: IMSI not available - try to read again through eap_proxy");
1764                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1765                                                              wpa_s->imsi,
1766                                                              &len);
1767                 if (wpa_s->mnc_len > 0) {
1768                         wpa_s->imsi[len] = '\0';
1769                         wpa_printf(MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)",
1770                                    wpa_s->imsi, wpa_s->mnc_len);
1771                 } else {
1772                         wpa_printf(MSG_DEBUG, "eap_proxy: IMSI not available");
1773                 }
1774         }
1775 #endif /* CONFIG_EAP_PROXY */
1776
1777         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1778                 char *sep;
1779                 const char *imsi;
1780                 int mnc_len;
1781                 char imsi_buf[16];
1782                 size_t msin_len;
1783
1784 #ifdef PCSC_FUNCS
1785                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1786                     wpa_s->imsi[0]) {
1787                         imsi = wpa_s->imsi;
1788                         mnc_len = wpa_s->mnc_len;
1789                         goto compare;
1790                 }
1791 #endif /* PCSC_FUNCS */
1792 #ifdef CONFIG_EAP_PROXY
1793                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1794                         imsi = wpa_s->imsi;
1795                         mnc_len = wpa_s->mnc_len;
1796                         goto compare;
1797                 }
1798 #endif /* CONFIG_EAP_PROXY */
1799
1800                 if (cred->imsi == NULL || !cred->imsi[0] ||
1801                     (!wpa_s->conf->external_sim &&
1802                      (cred->milenage == NULL || !cred->milenage[0])))
1803                         continue;
1804
1805                 sep = os_strchr(cred->imsi, '-');
1806                 if (sep == NULL ||
1807                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1808                         continue;
1809                 mnc_len = sep - cred->imsi - 3;
1810                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1811                 sep++;
1812                 msin_len = os_strlen(cred->imsi);
1813                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1814                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1815                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1816                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1817                 imsi = imsi_buf;
1818
1819 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1820         compare:
1821 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1822                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1823                            MACSTR, MAC2STR(bss->bssid));
1824                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1825                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1826                 if (ret) {
1827                         if (cred_no_required_oi_match(cred, bss))
1828                                 continue;
1829                         if (!ignore_bw &&
1830                             cred_below_min_backhaul(wpa_s, cred, bss))
1831                                 continue;
1832                         if (!ignore_bw &&
1833                             cred_over_max_bss_load(wpa_s, cred, bss))
1834                                 continue;
1835                         if (!ignore_bw &&
1836                             cred_conn_capab_missing(wpa_s, cred, bss))
1837                                 continue;
1838                         if (cred_excluded_ssid(cred, bss)) {
1839                                 if (excluded == NULL)
1840                                         continue;
1841                                 if (selected == NULL) {
1842                                         selected = cred;
1843                                         is_excluded = 1;
1844                                 }
1845                         } else {
1846                                 if (selected == NULL || is_excluded ||
1847                                     cred_prio_cmp(selected, cred) < 0) {
1848                                         selected = cred;
1849                                         is_excluded = 0;
1850                                 }
1851                         }
1852                 }
1853         }
1854
1855         if (excluded)
1856                 *excluded = is_excluded;
1857 #endif /* INTERWORKING_3GPP */
1858         return selected;
1859 }
1860
1861
1862 static struct wpa_cred * interworking_credentials_available_realm(
1863         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1864         int *excluded)
1865 {
1866         struct wpa_cred *cred, *selected = NULL;
1867         struct nai_realm *realm;
1868         u16 count, i;
1869         int is_excluded = 0;
1870
1871         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1872                 return NULL;
1873
1874         if (wpa_s->conf->cred == NULL)
1875                 return NULL;
1876
1877         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1878                    MACSTR, MAC2STR(bss->bssid));
1879         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1880         if (realm == NULL) {
1881                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1882                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1883                 return NULL;
1884         }
1885
1886         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1887                 if (cred->realm == NULL)
1888                         continue;
1889
1890                 for (i = 0; i < count; i++) {
1891                         if (!nai_realm_match(&realm[i], cred->realm))
1892                                 continue;
1893                         if (nai_realm_find_eap(cred, &realm[i])) {
1894                                 if (cred_no_required_oi_match(cred, bss))
1895                                         continue;
1896                                 if (!ignore_bw &&
1897                                     cred_below_min_backhaul(wpa_s, cred, bss))
1898                                         continue;
1899                                 if (!ignore_bw &&
1900                                     cred_over_max_bss_load(wpa_s, cred, bss))
1901                                         continue;
1902                                 if (!ignore_bw &&
1903                                     cred_conn_capab_missing(wpa_s, cred, bss))
1904                                         continue;
1905                                 if (cred_excluded_ssid(cred, bss)) {
1906                                         if (excluded == NULL)
1907                                                 continue;
1908                                         if (selected == NULL) {
1909                                                 selected = cred;
1910                                                 is_excluded = 1;
1911                                         }
1912                                 } else {
1913                                         if (selected == NULL || is_excluded ||
1914                                             cred_prio_cmp(selected, cred) < 0)
1915                                         {
1916                                                 selected = cred;
1917                                                 is_excluded = 0;
1918                                         }
1919                                 }
1920                                 break;
1921                         }
1922                 }
1923         }
1924
1925         nai_realm_free(realm, count);
1926
1927         if (excluded)
1928                 *excluded = is_excluded;
1929
1930         return selected;
1931 }
1932
1933
1934 static struct wpa_cred * interworking_credentials_available_helper(
1935         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1936         int *excluded)
1937 {
1938         struct wpa_cred *cred, *cred2;
1939         int excluded1, excluded2;
1940
1941         if (disallowed_bssid(wpa_s, bss->bssid) ||
1942             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1943                 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
1944                            MACSTR, MAC2STR(bss->bssid));
1945                 return NULL;
1946         }
1947
1948         cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
1949                                                         &excluded1);
1950         cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
1951                                                         &excluded2);
1952         if (cred && cred2 &&
1953             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
1954                 cred = cred2;
1955                 excluded1 = excluded2;
1956         }
1957         if (!cred) {
1958                 cred = cred2;
1959                 excluded1 = excluded2;
1960         }
1961
1962         cred2 = interworking_credentials_available_roaming_consortium(
1963                 wpa_s, bss, ignore_bw, &excluded2);
1964         if (cred && cred2 &&
1965             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
1966                 cred = cred2;
1967                 excluded1 = excluded2;
1968         }
1969         if (!cred) {
1970                 cred = cred2;
1971                 excluded1 = excluded2;
1972         }
1973
1974         if (excluded)
1975                 *excluded = excluded1;
1976         return cred;
1977 }
1978
1979
1980 static struct wpa_cred * interworking_credentials_available(
1981         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
1982 {
1983         struct wpa_cred *cred;
1984
1985         if (excluded)
1986                 *excluded = 0;
1987         cred = interworking_credentials_available_helper(wpa_s, bss, 0,
1988                                                          excluded);
1989         if (cred)
1990                 return cred;
1991         return interworking_credentials_available_helper(wpa_s, bss, 1,
1992                                                          excluded);
1993 }
1994
1995
1996 int domain_name_list_contains(struct wpabuf *domain_names,
1997                               const char *domain, int exact_match)
1998 {
1999         const u8 *pos, *end;
2000         size_t len;
2001
2002         len = os_strlen(domain);
2003         pos = wpabuf_head(domain_names);
2004         end = pos + wpabuf_len(domain_names);
2005
2006         while (pos + 1 < end) {
2007                 if (pos + 1 + pos[0] > end)
2008                         break;
2009
2010                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2011                                   pos + 1, pos[0]);
2012                 if (pos[0] == len &&
2013                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
2014                         return 1;
2015                 if (!exact_match && pos[0] > len && pos[pos[0] - len] == '.') {
2016                         const char *ap = (const char *) (pos + 1);
2017                         int offset = pos[0] - len;
2018                         if (os_strncasecmp(domain, ap + offset, len) == 0)
2019                                 return 1;
2020                 }
2021
2022                 pos += 1 + pos[0];
2023         }
2024
2025         return 0;
2026 }
2027
2028
2029 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2030                               struct wpa_cred *cred,
2031                               struct wpabuf *domain_names)
2032 {
2033         size_t i;
2034         int ret = -1;
2035 #ifdef INTERWORKING_3GPP
2036         char nai[100], *realm;
2037
2038         char *imsi = NULL;
2039         int mnc_len = 0;
2040         if (cred->imsi)
2041                 imsi = cred->imsi;
2042 #ifdef CONFIG_PCSC
2043         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
2044                  wpa_s->scard && wpa_s->imsi[0]) {
2045                 imsi = wpa_s->imsi;
2046                 mnc_len = wpa_s->mnc_len;
2047         }
2048 #endif /* CONFIG_PCSC */
2049 #ifdef CONFIG_EAP_PROXY
2050         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2051                 imsi = wpa_s->imsi;
2052                 mnc_len = wpa_s->mnc_len;
2053         }
2054 #endif /* CONFIG_EAP_PROXY */
2055         if (domain_names &&
2056             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2057                 realm = os_strchr(nai, '@');
2058                 if (realm)
2059                         realm++;
2060                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
2061                            "with SIM/USIM domain %s", realm);
2062                 if (realm &&
2063                     domain_name_list_contains(domain_names, realm, 1))
2064                         return 1;
2065                 if (realm)
2066                         ret = 0;
2067         }
2068 #endif /* INTERWORKING_3GPP */
2069
2070         if (domain_names == NULL || cred->domain == NULL)
2071                 return ret;
2072
2073         for (i = 0; i < cred->num_domain; i++) {
2074                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
2075                            "home SP FQDN %s", cred->domain[i]);
2076                 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2077                         return 1;
2078         }
2079
2080         return 0;
2081 }
2082
2083
2084 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2085                                 struct wpabuf *domain_names)
2086 {
2087         struct wpa_cred *cred;
2088
2089         if (domain_names == NULL || wpa_s->conf->cred == NULL)
2090                 return -1;
2091
2092         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2093                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2094                 if (res)
2095                         return res;
2096         }
2097
2098         return 0;
2099 }
2100
2101
2102 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2103 {
2104         struct wpa_bss *bss;
2105         struct wpa_ssid *ssid;
2106
2107         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2108                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2109                         if (wpas_network_disabled(wpa_s, ssid) ||
2110                             ssid->mode != WPAS_MODE_INFRA)
2111                                 continue;
2112                         if (ssid->ssid_len != bss->ssid_len ||
2113                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2114                             0)
2115                                 continue;
2116                         /*
2117                          * TODO: Consider more accurate matching of security
2118                          * configuration similarly to what is done in events.c
2119                          */
2120                         return 1;
2121                 }
2122         }
2123
2124         return 0;
2125 }
2126
2127
2128 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2129                                  struct roaming_partner *partner,
2130                                  struct wpabuf *domain_names)
2131 {
2132         if (!domain_name_list_contains(domain_names, partner->fqdn,
2133                                        partner->exact_match))
2134                 return 0;
2135         /* TODO: match Country */
2136         return 1;
2137 }
2138
2139
2140 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2141                        struct wpa_bss *bss)
2142 {
2143         size_t i;
2144
2145         if (bss->anqp == NULL || bss->anqp->domain_name == NULL)
2146                 return 128; /* cannot check preference with domain name */
2147
2148         if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2149                 return 0; /* max preference for home SP network */
2150
2151         for (i = 0; i < cred->num_roaming_partner; i++) {
2152                 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2153                                           bss->anqp->domain_name))
2154                         return cred->roaming_partner[i].priority;
2155         }
2156
2157         return 128;
2158 }
2159
2160
2161 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2162                                                   struct wpa_bss *selected,
2163                                                   struct wpa_cred *cred)
2164 {
2165         struct wpa_bss *bss;
2166         u8 best_prio, prio;
2167         struct wpa_cred *cred2;
2168
2169         /*
2170          * Check if any other BSS is operated by a more preferred roaming
2171          * partner.
2172          */
2173
2174         best_prio = roaming_prio(wpa_s, cred, selected);
2175         wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2176                    MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2177                    cred->id);
2178
2179         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2180                 if (bss == selected)
2181                         continue;
2182                 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2183                 if (!cred2)
2184                         continue;
2185                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2186                         continue;
2187                 prio = roaming_prio(wpa_s, cred2, bss);
2188                 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2189                            MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2190                            cred2->id);
2191                 if (prio < best_prio) {
2192                         int bh1, bh2, load1, load2, conn1, conn2;
2193                         bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2194                         load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2195                         conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2196                         bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2197                         load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2198                         conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2199                         wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d  new: %d %d %d",
2200                                    bh1, load1, conn1, bh2, load2, conn2);
2201                         if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2202                                 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2203                                 best_prio = prio;
2204                                 selected = bss;
2205                         }
2206                 }
2207         }
2208
2209         return selected;
2210 }
2211
2212
2213 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2214 {
2215         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2216         struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2217         unsigned int count = 0;
2218         const char *type;
2219         int res;
2220         struct wpa_cred *cred, *selected_cred = NULL;
2221         struct wpa_cred *selected_home_cred = NULL;
2222         struct wpa_cred *selected2_cred = NULL;
2223         struct wpa_cred *selected2_home_cred = NULL;
2224
2225         wpa_s->network_select = 0;
2226
2227         wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2228                    wpa_s->auto_select);
2229         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2230                 int excluded = 0;
2231                 int bh, bss_load, conn_capab;
2232                 cred = interworking_credentials_available(wpa_s, bss,
2233                                                           &excluded);
2234                 if (!cred)
2235                         continue;
2236                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2237                         /*
2238                          * We currently support only HS 2.0 networks and those
2239                          * are required to use WPA2-Enterprise.
2240                          */
2241                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
2242                                    "with " MACSTR " but network does not use "
2243                                    "RSN", MAC2STR(bss->bssid));
2244                         continue;
2245                 }
2246                 if (!excluded)
2247                         count++;
2248                 res = interworking_home_sp(wpa_s, bss->anqp ?
2249                                            bss->anqp->domain_name : NULL);
2250                 if (res > 0)
2251                         type = "home";
2252                 else if (res == 0)
2253                         type = "roaming";
2254                 else
2255                         type = "unknown";
2256                 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2257                 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2258                 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2259                 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2260                         excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2261                         MAC2STR(bss->bssid), type,
2262                         bh ? " below_min_backhaul=1" : "",
2263                         bss_load ? " over_max_bss_load=1" : "",
2264                         conn_capab ? " conn_capab_missing=1" : "",
2265                         cred->id, cred->priority, cred->sp_priority);
2266                 if (excluded)
2267                         continue;
2268                 if (wpa_s->auto_select ||
2269                     (wpa_s->conf->auto_interworking &&
2270                      wpa_s->auto_network_select)) {
2271                         if (bh || bss_load || conn_capab) {
2272                                 if (selected2_cred == NULL ||
2273                                     cred_prio_cmp(cred, selected2_cred) > 0) {
2274                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2275                                         selected2 = bss;
2276                                         selected2_cred = cred;
2277                                 }
2278                                 if (res > 0 &&
2279                                     (selected2_home_cred == NULL ||
2280                                      cred_prio_cmp(cred, selected2_home_cred) >
2281                                      0)) {
2282                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2283                                         selected2_home = bss;
2284                                         selected2_home_cred = cred;
2285                                 }
2286                         } else {
2287                                 if (selected_cred == NULL ||
2288                                     cred_prio_cmp(cred, selected_cred) > 0) {
2289                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2290                                         selected = bss;
2291                                         selected_cred = cred;
2292                                 }
2293                                 if (res > 0 &&
2294                                     (selected_home_cred == NULL ||
2295                                      cred_prio_cmp(cred, selected_home_cred) >
2296                                      0)) {
2297                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2298                                         selected_home = bss;
2299                                         selected_home_cred = cred;
2300                                 }
2301                         }
2302                 }
2303         }
2304
2305         if (selected_home && selected_home != selected &&
2306             selected_home_cred &&
2307             (selected_cred == NULL ||
2308              cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2309                 /* Prefer network operated by the Home SP */
2310                 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2311                 selected = selected_home;
2312                 selected_cred = selected_home_cred;
2313         }
2314
2315         if (!selected) {
2316                 if (selected2_home) {
2317                         wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2318                         selected = selected2_home;
2319                         selected_cred = selected2_home_cred;
2320                 } else if (selected2) {
2321                         wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2322                         selected = selected2;
2323                         selected_cred = selected2_cred;
2324                 }
2325         }
2326
2327         if (count == 0) {
2328                 /*
2329                  * No matching network was found based on configured
2330                  * credentials. Check whether any of the enabled network blocks
2331                  * have matching APs.
2332                  */
2333                 if (interworking_find_network_match(wpa_s)) {
2334                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
2335                                    "match for enabled network configurations");
2336                         if (wpa_s->auto_select)
2337                                 interworking_reconnect(wpa_s);
2338                         return;
2339                 }
2340
2341                 if (wpa_s->auto_network_select) {
2342                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
2343                                    "scanning after ANQP fetch");
2344                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2345                                                 0);
2346                         return;
2347                 }
2348
2349                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2350                         "with matching credentials found");
2351         }
2352
2353         if (selected) {
2354                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2355                            MAC2STR(selected->bssid));
2356                 selected = pick_best_roaming_partner(wpa_s, selected,
2357                                                      selected_cred);
2358                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2359                            " (after best roaming partner selection)",
2360                            MAC2STR(selected->bssid));
2361                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2362                         MAC2STR(selected->bssid));
2363                 interworking_connect(wpa_s, selected);
2364         }
2365 }
2366
2367
2368 static struct wpa_bss_anqp *
2369 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2370 {
2371         struct wpa_bss *other;
2372
2373         if (is_zero_ether_addr(bss->hessid))
2374                 return NULL; /* Cannot be in the same homegenous ESS */
2375
2376         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2377                 if (other == bss)
2378                         continue;
2379                 if (other->anqp == NULL)
2380                         continue;
2381                 if (other->anqp->roaming_consortium == NULL &&
2382                     other->anqp->nai_realm == NULL &&
2383                     other->anqp->anqp_3gpp == NULL &&
2384                     other->anqp->domain_name == NULL)
2385                         continue;
2386                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2387                         continue;
2388                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2389                         continue;
2390                 if (bss->ssid_len != other->ssid_len ||
2391                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2392                         continue;
2393
2394                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
2395                            "already fetched BSSID " MACSTR " and " MACSTR,
2396                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
2397                 other->anqp->users++;
2398                 return other->anqp;
2399         }
2400
2401         return NULL;
2402 }
2403
2404
2405 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2406 {
2407         struct wpa_bss *bss;
2408         int found = 0;
2409         const u8 *ie;
2410
2411         wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2412                    "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2413                    wpa_s->fetch_anqp_in_progress,
2414                    wpa_s->fetch_osu_icon_in_progress);
2415
2416         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2417                 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2418                 return;
2419         }
2420
2421         if (wpa_s->fetch_osu_icon_in_progress) {
2422                 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2423                 hs20_next_osu_icon(wpa_s);
2424                 return;
2425         }
2426
2427         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2428                 if (!(bss->caps & IEEE80211_CAP_ESS))
2429                         continue;
2430                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2431                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2432                         continue; /* AP does not support Interworking */
2433                 if (disallowed_bssid(wpa_s, bss->bssid) ||
2434                     disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2435                         continue; /* Disallowed BSS */
2436
2437                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2438                         if (bss->anqp == NULL) {
2439                                 bss->anqp = interworking_match_anqp_info(wpa_s,
2440                                                                          bss);
2441                                 if (bss->anqp) {
2442                                         /* Shared data already fetched */
2443                                         continue;
2444                                 }
2445                                 bss->anqp = wpa_bss_anqp_alloc();
2446                                 if (bss->anqp == NULL)
2447                                         break;
2448                         }
2449                         found++;
2450                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2451                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2452                                 MACSTR, MAC2STR(bss->bssid));
2453                         interworking_anqp_send_req(wpa_s, bss);
2454                         break;
2455                 }
2456         }
2457
2458         if (found == 0) {
2459                 if (wpa_s->fetch_osu_info) {
2460                         wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2461                         hs20_osu_icon_fetch(wpa_s);
2462                         return;
2463                 }
2464                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2465                 wpa_s->fetch_anqp_in_progress = 0;
2466                 if (wpa_s->network_select)
2467                         interworking_select_network(wpa_s);
2468         }
2469 }
2470
2471
2472 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2473 {
2474         struct wpa_bss *bss;
2475
2476         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2477                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2478
2479         wpa_s->fetch_anqp_in_progress = 1;
2480         interworking_next_anqp_fetch(wpa_s);
2481 }
2482
2483
2484 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2485 {
2486         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2487                 return 0;
2488
2489         wpa_s->network_select = 0;
2490         wpa_s->fetch_all_anqp = 1;
2491         wpa_s->fetch_osu_info = 0;
2492
2493         interworking_start_fetch_anqp(wpa_s);
2494
2495         return 0;
2496 }
2497
2498
2499 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2500 {
2501         if (!wpa_s->fetch_anqp_in_progress)
2502                 return;
2503
2504         wpa_s->fetch_anqp_in_progress = 0;
2505 }
2506
2507
2508 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2509                   u16 info_ids[], size_t num_ids)
2510 {
2511         struct wpabuf *buf;
2512         int ret = 0;
2513         int freq;
2514         struct wpa_bss *bss;
2515         int res;
2516
2517         freq = wpa_s->assoc_freq;
2518         bss = wpa_bss_get_bssid(wpa_s, dst);
2519         if (bss) {
2520                 wpa_bss_anqp_unshare_alloc(bss);
2521                 freq = bss->freq;
2522         }
2523         if (freq <= 0)
2524                 return -1;
2525
2526         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
2527                    MAC2STR(dst), (unsigned int) num_ids);
2528
2529         buf = anqp_build_req(info_ids, num_ids, NULL);
2530         if (buf == NULL)
2531                 return -1;
2532
2533         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2534         if (res < 0) {
2535                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
2536                 wpabuf_free(buf);
2537                 ret = -1;
2538         } else
2539                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
2540                            "%u", res);
2541
2542         return ret;
2543 }
2544
2545
2546 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2547                                             struct wpa_bss *bss, const u8 *sa,
2548                                             u16 info_id,
2549                                             const u8 *data, size_t slen)
2550 {
2551         const u8 *pos = data;
2552         struct wpa_bss_anqp *anqp = NULL;
2553 #ifdef CONFIG_HS20
2554         u8 type;
2555 #endif /* CONFIG_HS20 */
2556
2557         if (bss)
2558                 anqp = bss->anqp;
2559
2560         switch (info_id) {
2561         case ANQP_CAPABILITY_LIST:
2562                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2563                         " ANQP Capability list", MAC2STR(sa));
2564                 break;
2565         case ANQP_VENUE_NAME:
2566                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2567                         " Venue Name", MAC2STR(sa));
2568                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2569                 if (anqp) {
2570                         wpabuf_free(anqp->venue_name);
2571                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2572                 }
2573                 break;
2574         case ANQP_NETWORK_AUTH_TYPE:
2575                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2576                         " Network Authentication Type information",
2577                         MAC2STR(sa));
2578                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2579                                   "Type", pos, slen);
2580                 if (anqp) {
2581                         wpabuf_free(anqp->network_auth_type);
2582                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2583                 }
2584                 break;
2585         case ANQP_ROAMING_CONSORTIUM:
2586                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2587                         " Roaming Consortium list", MAC2STR(sa));
2588                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2589                                   pos, slen);
2590                 if (anqp) {
2591                         wpabuf_free(anqp->roaming_consortium);
2592                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2593                 }
2594                 break;
2595         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2596                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2597                         " IP Address Type Availability information",
2598                         MAC2STR(sa));
2599                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2600                             pos, slen);
2601                 if (anqp) {
2602                         wpabuf_free(anqp->ip_addr_type_availability);
2603                         anqp->ip_addr_type_availability =
2604                                 wpabuf_alloc_copy(pos, slen);
2605                 }
2606                 break;
2607         case ANQP_NAI_REALM:
2608                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2609                         " NAI Realm list", MAC2STR(sa));
2610                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2611                 if (anqp) {
2612                         wpabuf_free(anqp->nai_realm);
2613                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2614                 }
2615                 break;
2616         case ANQP_3GPP_CELLULAR_NETWORK:
2617                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2618                         " 3GPP Cellular Network information", MAC2STR(sa));
2619                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2620                                   pos, slen);
2621                 if (anqp) {
2622                         wpabuf_free(anqp->anqp_3gpp);
2623                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2624                 }
2625                 break;
2626         case ANQP_DOMAIN_NAME:
2627                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2628                         " Domain Name list", MAC2STR(sa));
2629                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2630                 if (anqp) {
2631                         wpabuf_free(anqp->domain_name);
2632                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2633                 }
2634                 break;
2635         case ANQP_VENDOR_SPECIFIC:
2636                 if (slen < 3)
2637                         return;
2638
2639                 switch (WPA_GET_BE24(pos)) {
2640 #ifdef CONFIG_HS20
2641                 case OUI_WFA:
2642                         pos += 3;
2643                         slen -= 3;
2644
2645                         if (slen < 1)
2646                                 return;
2647                         type = *pos++;
2648                         slen--;
2649
2650                         switch (type) {
2651                         case HS20_ANQP_OUI_TYPE:
2652                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
2653                                                              slen);
2654                                 break;
2655                         default:
2656                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
2657                                            "vendor type %u", type);
2658                                 break;
2659                         }
2660                         break;
2661 #endif /* CONFIG_HS20 */
2662                 default:
2663                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
2664                                    "vendor-specific ANQP OUI %06x",
2665                                    WPA_GET_BE24(pos));
2666                         return;
2667                 }
2668                 break;
2669         default:
2670                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
2671                            "%u", info_id);
2672                 break;
2673         }
2674 }
2675
2676
2677 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2678                   enum gas_query_result result,
2679                   const struct wpabuf *adv_proto,
2680                   const struct wpabuf *resp, u16 status_code)
2681 {
2682         struct wpa_supplicant *wpa_s = ctx;
2683         const u8 *pos;
2684         const u8 *end;
2685         u16 info_id;
2686         u16 slen;
2687         struct wpa_bss *bss = NULL, *tmp;
2688
2689         wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2690                    " dialog_token=%u result=%d status_code=%u",
2691                    MAC2STR(dst), dialog_token, result, status_code);
2692         if (result != GAS_QUERY_SUCCESS) {
2693                 if (wpa_s->fetch_osu_icon_in_progress)
2694                         hs20_icon_fetch_failed(wpa_s);
2695                 return;
2696         }
2697
2698         pos = wpabuf_head(adv_proto);
2699         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2700             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2701                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
2702                            "Protocol in response");
2703                 if (wpa_s->fetch_osu_icon_in_progress)
2704                         hs20_icon_fetch_failed(wpa_s);
2705                 return;
2706         }
2707
2708         /*
2709          * If possible, select the BSS entry based on which BSS entry was used
2710          * for the request. This can help in cases where multiple BSS entries
2711          * may exist for the same AP.
2712          */
2713         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2714                 if (tmp == wpa_s->interworking_gas_bss &&
2715                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2716                         bss = tmp;
2717                         break;
2718                 }
2719         }
2720         if (bss == NULL)
2721                 bss = wpa_bss_get_bssid(wpa_s, dst);
2722
2723         pos = wpabuf_head(resp);
2724         end = pos + wpabuf_len(resp);
2725
2726         while (pos < end) {
2727                 if (pos + 4 > end) {
2728                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
2729                         break;
2730                 }
2731                 info_id = WPA_GET_LE16(pos);
2732                 pos += 2;
2733                 slen = WPA_GET_LE16(pos);
2734                 pos += 2;
2735                 if (pos + slen > end) {
2736                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
2737                                    "for Info ID %u", info_id);
2738                         break;
2739                 }
2740                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2741                                                 slen);
2742                 pos += slen;
2743         }
2744
2745         hs20_notify_parse_done(wpa_s);
2746 }
2747
2748
2749 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2750                                           struct wpa_scan_results *scan_res)
2751 {
2752         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2753                    "ANQP fetch");
2754         interworking_start_fetch_anqp(wpa_s);
2755 }
2756
2757
2758 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
2759                         int *freqs)
2760 {
2761         interworking_stop_fetch_anqp(wpa_s);
2762         wpa_s->network_select = 1;
2763         wpa_s->auto_network_select = 0;
2764         wpa_s->auto_select = !!auto_select;
2765         wpa_s->fetch_all_anqp = 0;
2766         wpa_s->fetch_osu_info = 0;
2767         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2768                    "selection");
2769         wpa_s->scan_res_handler = interworking_scan_res_handler;
2770         wpa_s->normal_scans = 0;
2771         wpa_s->scan_req = MANUAL_SCAN_REQ;
2772         os_free(wpa_s->manual_scan_freqs);
2773         wpa_s->manual_scan_freqs = freqs;
2774         wpa_s->after_wps = 0;
2775         wpa_s->known_wps_freq = 0;
2776         wpa_supplicant_req_scan(wpa_s, 0, 0);
2777
2778         return 0;
2779 }
2780
2781
2782 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2783                         enum gas_query_result result,
2784                         const struct wpabuf *adv_proto,
2785                         const struct wpabuf *resp, u16 status_code)
2786 {
2787         struct wpa_supplicant *wpa_s = ctx;
2788         struct wpabuf *n;
2789
2790         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2791                 " dialog_token=%d status_code=%d resp_len=%d",
2792                 MAC2STR(addr), dialog_token, status_code,
2793                 resp ? (int) wpabuf_len(resp) : -1);
2794         if (!resp)
2795                 return;
2796
2797         n = wpabuf_dup(resp);
2798         if (n == NULL)
2799                 return;
2800         wpabuf_free(wpa_s->prev_gas_resp);
2801         wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
2802         os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
2803         wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
2804         wpa_s->last_gas_resp = n;
2805         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2806         wpa_s->last_gas_dialog_token = dialog_token;
2807 }
2808
2809
2810 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2811                      const struct wpabuf *adv_proto,
2812                      const struct wpabuf *query)
2813 {
2814         struct wpabuf *buf;
2815         int ret = 0;
2816         int freq;
2817         struct wpa_bss *bss;
2818         int res;
2819         size_t len;
2820         u8 query_resp_len_limit = 0, pame_bi = 0;
2821
2822         freq = wpa_s->assoc_freq;
2823         bss = wpa_bss_get_bssid(wpa_s, dst);
2824         if (bss)
2825                 freq = bss->freq;
2826         if (freq <= 0)
2827                 return -1;
2828
2829         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2830                    MAC2STR(dst), freq);
2831         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2832         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2833
2834         len = 3 + wpabuf_len(adv_proto) + 2;
2835         if (query)
2836                 len += wpabuf_len(query);
2837         buf = gas_build_initial_req(0, len);
2838         if (buf == NULL)
2839                 return -1;
2840
2841         /* Advertisement Protocol IE */
2842         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2843         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2844         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2845                       (pame_bi ? 0x80 : 0));
2846         wpabuf_put_buf(buf, adv_proto);
2847
2848         /* GAS Query */
2849         if (query) {
2850                 wpabuf_put_le16(buf, wpabuf_len(query));
2851                 wpabuf_put_buf(buf, query);
2852         } else
2853                 wpabuf_put_le16(buf, 0);
2854
2855         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2856         if (res < 0) {
2857                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2858                 wpabuf_free(buf);
2859                 ret = -1;
2860         } else
2861                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2862                            "%u", res);
2863
2864         return ret;
2865 }