wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
   4  * Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
   5  *
   6  * This software may be distributed under the terms of the BSD license.
   7  * See README for more details.
   8  */
   9
  10 #include "includes.h"
  11
  12 #include "common.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/gas.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "utils/pcsc_funcs.h"
  17 #include "utils/eloop.h"
  18 #include "drivers/driver.h"
  19 #include "eap_common/eap_defs.h"
  20 #include "eap_peer/eap.h"
  21 #include "eap_peer/eap_methods.h"
  22 #include "eapol_supp/eapol_supp_sm.h"
  23 #include "rsn_supp/wpa.h"
  24 #include "wpa_supplicant_i.h"
  25 #include "config.h"
  26 #include "config_ssid.h"
  27 #include "bss.h"
  28 #include "scan.h"
  29 #include "notify.h"
  30 #include "driver_i.h"
  31 #include "gas_query.h"
  32 #include "hs20_supplicant.h"
  33 #include "interworking.h"
  34
  35
  36 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  37 #define INTERWORKING_3GPP
  38 #else
  39 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  40 #define INTERWORKING_3GPP
  41 #else
  42 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  43 #define INTERWORKING_3GPP
  44 #endif
  45 #endif
  46 #endif
  47
  48 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  49 static struct wpa_cred * interworking_credentials_available_realm(
  50         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
  51         int *excluded);
  52 static struct wpa_cred * interworking_credentials_available_3gpp(
  53         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
  54         int *excluded);
  55
  56
  57 static int cred_prio_cmp(const struct wpa_cred *a, const struct wpa_cred *b)
  58 {
  59         if (a->priority > b->priority)
  60                 return 1;
  61         if (a->priority < b->priority)
  62                 return -1;
  63         if (a->provisioning_sp == NULL || b->provisioning_sp == NULL ||
  64             os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0)
  65                 return 0;
  66         if (a->sp_priority < b->sp_priority)
  67                 return 1;
  68         if (a->sp_priority > b->sp_priority)
  69                 return -1;
  70         return 0;
  71 }
  72
  73
  74 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  75 {
  76         unsigned int tried;
  77
  78         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  79                 wpa_supplicant_cancel_sched_scan(wpa_s);
  80                 wpa_supplicant_deauthenticate(wpa_s,
  81                                               WLAN_REASON_DEAUTH_LEAVING);
  82         }
  83         wpa_s->disconnected = 0;
  84         wpa_s->reassociate = 1;
  85         tried = wpa_s->interworking_fast_assoc_tried;
  86         wpa_s->interworking_fast_assoc_tried = 1;
  87
  88         if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0)
  89                 return;
  90
  91         wpa_s->interworking_fast_assoc_tried = 0;
  92         wpa_supplicant_req_scan(wpa_s, 0, 0);
  93 }
  94
  95
  96 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  97                                       struct wpabuf *extra)
  98 {
  99         struct wpabuf *buf;
 100         size_t i;
 101         u8 *len_pos;
 102
 103         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
 104                                          (extra ? wpabuf_len(extra) : 0));
 105         if (buf == NULL)
 106                 return NULL;
 107
 108         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
 109         for (i = 0; i < num_ids; i++)
 110                 wpabuf_put_le16(buf, info_ids[i]);
 111         gas_anqp_set_element_len(buf, len_pos);
 112         if (extra)
 113                 wpabuf_put_buf(buf, extra);
 114
 115         gas_anqp_set_len(buf);
 116
 117         return buf;
 118 }
 119
 120
 121 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
 122                                       u8 dialog_token,
 123                                       enum gas_query_result result,
 124                                       const struct wpabuf *adv_proto,
 125                                       const struct wpabuf *resp,
 126                                       u16 status_code)
 127 {
 128         struct wpa_supplicant *wpa_s = ctx;
 129
 130         wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
 131                    " dialog_token=%u result=%d status_code=%u",
 132                    MAC2STR(dst), dialog_token, result, status_code);
 133         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 134                      status_code);
 135         interworking_next_anqp_fetch(wpa_s);
 136 }
 137
 138
 139 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 140 {
 141         struct wpa_cred *cred;
 142
 143         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 144                 if (cred->roaming_consortium_len)
 145                         return 1;
 146                 if (cred->required_roaming_consortium_len)
 147                         return 1;
 148         }
 149         return 0;
 150 }
 151
 152
 153 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 154 {
 155         struct wpa_cred *cred;
 156
 157         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 158                 if (cred->pcsc || cred->imsi)
 159                         return 1;
 160         }
 161         return 0;
 162 }
 163
 164
 165 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 166 {
 167         struct wpa_cred *cred;
 168
 169         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 170                 if (cred->pcsc || cred->imsi)
 171                         continue;
 172                 if (!cred->eap_method)
 173                         return 1;
 174                 if (cred->realm && cred->roaming_consortium_len == 0)
 175                         return 1;
 176         }
 177         return 0;
 178 }
 179
 180
 181 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 182 {
 183         struct wpa_cred *cred;
 184
 185         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 186                 if (cred->domain || cred->pcsc || cred->imsi ||
 187                     cred->roaming_partner)
 188                         return 1;
 189         }
 190         return 0;
 191 }
 192
 193
 194 #ifdef CONFIG_HS20
 195
 196 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
 197 {
 198         struct wpa_cred *cred;
 199
 200         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 201                 if (cred->min_dl_bandwidth_home ||
 202                     cred->min_ul_bandwidth_home ||
 203                     cred->min_dl_bandwidth_roaming ||
 204                     cred->min_ul_bandwidth_roaming)
 205                         return 1;
 206         }
 207         return 0;
 208 }
 209
 210
 211 static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
 212 {
 213         struct wpa_cred *cred;
 214
 215         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 216                 if (cred->num_req_conn_capab)
 217                         return 1;
 218         }
 219         return 0;
 220 }
 221
 222 #endif /* CONFIG_HS20 */
 223
 224
 225 static int additional_roaming_consortiums(struct wpa_bss *bss)
 226 {
 227         const u8 *ie;
 228         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 229         if (ie == NULL || ie[1] == 0)
 230                 return 0;
 231         return ie[2]; /* Number of ANQP OIs */
 232 }
 233
 234
 235 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 236 {
 237         struct wpa_supplicant *wpa_s = eloop_ctx;
 238         interworking_next_anqp_fetch(wpa_s);
 239 }
 240
 241
 242 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 243                                       struct wpa_bss *bss)
 244 {
 245         struct wpabuf *buf;
 246         int ret = 0;
 247         int res;
 248         u16 info_ids[8];
 249         size_t num_info_ids = 0;
 250         struct wpabuf *extra = NULL;
 251         int all = wpa_s->fetch_all_anqp;
 252
 253         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 254                 MAC2STR(bss->bssid));
 255         wpa_s->interworking_gas_bss = bss;
 256
 257         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 258         if (all) {
 259                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 260                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 261         }
 262         if (all || (cred_with_roaming_consortium(wpa_s) &&
 263                     additional_roaming_consortiums(bss)))
 264                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 265         if (all)
 266                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 267         if (all || cred_with_nai_realm(wpa_s))
 268                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 269         if (all || cred_with_3gpp(wpa_s)) {
 270                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 271                 wpa_supplicant_scard_init(wpa_s, NULL);
 272         }
 273         if (all || cred_with_domain(wpa_s))
 274                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 275         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 276                     (u8 *) info_ids, num_info_ids * 2);
 277
 278 #ifdef CONFIG_HS20
 279         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 280                 u8 *len_pos;
 281
 282                 extra = wpabuf_alloc(100);
 283                 if (!extra)
 284                         return -1;
 285
 286                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 287                 wpabuf_put_be24(extra, OUI_WFA);
 288                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 289                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 290                 wpabuf_put_u8(extra, 0); /* Reserved */
 291                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 292                 if (all)
 293                         wpabuf_put_u8(extra,
 294                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 295                 if (all || cred_with_min_backhaul(wpa_s))
 296                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 297                 if (all || cred_with_conn_capab(wpa_s))
 298                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 299                 if (all)
 300                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 301                 if (all)
 302                         wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
 303                 gas_anqp_set_element_len(extra, len_pos);
 304         }
 305 #endif /* CONFIG_HS20 */
 306
 307         buf = anqp_build_req(info_ids, num_info_ids, extra);
 308         wpabuf_free(extra);
 309         if (buf == NULL)
 310                 return -1;
 311
 312         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 313                             interworking_anqp_resp_cb, wpa_s);
 314         if (res < 0) {
 315                 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
 316                 wpabuf_free(buf);
 317                 ret = -1;
 318                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 319                                        NULL);
 320         } else
 321                 wpa_msg(wpa_s, MSG_DEBUG,
 322                         "ANQP: Query started with dialog token %u", res);
 323
 324         return ret;
 325 }
 326
 327
 328 struct nai_realm_eap {
 329         u8 method;
 330         u8 inner_method;
 331         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 332         u8 cred_type;
 333         u8 tunneled_cred_type;
 334 };
 335
 336 struct nai_realm {
 337         u8 encoding;
 338         char *realm;
 339         u8 eap_count;
 340         struct nai_realm_eap *eap;
 341 };
 342
 343
 344 static void nai_realm_free(struct nai_realm *realms, u16 count)
 345 {
 346         u16 i;
 347
 348         if (realms == NULL)
 349                 return;
 350         for (i = 0; i < count; i++) {
 351                 os_free(realms[i].eap);
 352                 os_free(realms[i].realm);
 353         }
 354         os_free(realms);
 355 }
 356
 357
 358 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 359                                       const u8 *end)
 360 {
 361         u8 elen, auth_count, a;
 362         const u8 *e_end;
 363
 364         if (pos + 3 > end) {
 365                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 366                 return NULL;
 367         }
 368
 369         elen = *pos++;
 370         if (pos + elen > end || elen < 2) {
 371                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 372                 return NULL;
 373         }
 374         e_end = pos + elen;
 375         e->method = *pos++;
 376         auth_count = *pos++;
 377         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 378                    elen, e->method, auth_count);
 379
 380         for (a = 0; a < auth_count; a++) {
 381                 u8 id, len;
 382
 383                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 384                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 385                                    "Parameter subfield");
 386                         return NULL;
 387                 }
 388
 389                 id = *pos++;
 390                 len = *pos++;
 391
 392                 switch (id) {
 393                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 394                         if (len < 1)
 395                                 break;
 396                         e->inner_non_eap = *pos;
 397                         if (e->method != EAP_TYPE_TTLS)
 398                                 break;
 399                         switch (*pos) {
 400                         case NAI_REALM_INNER_NON_EAP_PAP:
 401                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 402                                 break;
 403                         case NAI_REALM_INNER_NON_EAP_CHAP:
 404                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 405                                 break;
 406                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 407                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 408                                 break;
 409                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 410                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 411                                 break;
 412                         }
 413                         break;
 414                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 415                         if (len < 1)
 416                                 break;
 417                         e->inner_method = *pos;
 418                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 419                                    e->inner_method);
 420                         break;
 421                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 422                         if (len < 1)
 423                                 break;
 424                         e->cred_type = *pos;
 425                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 426                                    e->cred_type);
 427                         break;
 428                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 429                         if (len < 1)
 430                                 break;
 431                         e->tunneled_cred_type = *pos;
 432                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 433                                    "Type: %u", e->tunneled_cred_type);
 434                         break;
 435                 default:
 436                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 437                                    "Parameter: id=%u len=%u", id, len);
 438                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 439                                     "Value", pos, len);
 440                         break;
 441                 }
 442
 443                 pos += len;
 444         }
 445
 446         return e_end;
 447 }
 448
 449
 450 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 451                                         const u8 *end)
 452 {
 453         u16 len;
 454         const u8 *f_end;
 455         u8 realm_len, e;
 456
 457         if (end - pos < 4) {
 458                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 459                            "fixed fields");
 460                 return NULL;
 461         }
 462
 463         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 464         pos += 2;
 465         if (pos + len > end || len < 3) {
 466                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 467                            "(len=%u; left=%u)",
 468                            len, (unsigned int) (end - pos));
 469                 return NULL;
 470         }
 471         f_end = pos + len;
 472
 473         r->encoding = *pos++;
 474         realm_len = *pos++;
 475         if (pos + realm_len > f_end) {
 476                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 477                            "(len=%u; left=%u)",
 478                            realm_len, (unsigned int) (f_end - pos));
 479                 return NULL;
 480         }
 481         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 482         r->realm = dup_binstr(pos, realm_len);
 483         if (r->realm == NULL)
 484                 return NULL;
 485         pos += realm_len;
 486
 487         if (pos + 1 > f_end) {
 488                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 489                 return NULL;
 490         }
 491         r->eap_count = *pos++;
 492         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 493         if (pos + r->eap_count * 3 > f_end) {
 494                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 495                 return NULL;
 496         }
 497         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 498         if (r->eap == NULL)
 499                 return NULL;
 500
 501         for (e = 0; e < r->eap_count; e++) {
 502                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 503                 if (pos == NULL)
 504                         return NULL;
 505         }
 506
 507         return f_end;
 508 }
 509
 510
 511 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 512 {
 513         struct nai_realm *realm;
 514         const u8 *pos, *end;
 515         u16 i, num;
 516         size_t left;
 517
 518         if (anqp == NULL)
 519                 return NULL;
 520         left = wpabuf_len(anqp);
 521         if (left < 2)
 522                 return NULL;
 523
 524         pos = wpabuf_head_u8(anqp);
 525         end = pos + left;
 526         num = WPA_GET_LE16(pos);
 527         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 528         pos += 2;
 529         left -= 2;
 530
 531         if (num > left / 5) {
 532                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 533                            "enough data (%u octets) for that many realms",
 534                            num, (unsigned int) left);
 535                 return NULL;
 536         }
 537
 538         realm = os_calloc(num, sizeof(struct nai_realm));
 539         if (realm == NULL)
 540                 return NULL;
 541
 542         for (i = 0; i < num; i++) {
 543                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 544                 if (pos == NULL) {
 545                         nai_realm_free(realm, num);
 546                         return NULL;
 547                 }
 548         }
 549
 550         *count = num;
 551         return realm;
 552 }
 553
 554
 555 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 556 {
 557         char *tmp, *pos, *end;
 558         int match = 0;
 559
 560         if (realm->realm == NULL || home_realm == NULL)
 561                 return 0;
 562
 563         if (os_strchr(realm->realm, ';') == NULL)
 564                 return os_strcasecmp(realm->realm, home_realm) == 0;
 565
 566         tmp = os_strdup(realm->realm);
 567         if (tmp == NULL)
 568                 return 0;
 569
 570         pos = tmp;
 571         while (*pos) {
 572                 end = os_strchr(pos, ';');
 573                 if (end)
 574                         *end = '\0';
 575                 if (os_strcasecmp(pos, home_realm) == 0) {
 576                         match = 1;
 577                         break;
 578                 }
 579                 if (end == NULL)
 580                         break;
 581                 pos = end + 1;
 582         }
 583
 584         os_free(tmp);
 585
 586         return match;
 587 }
 588
 589
 590 static int nai_realm_cred_username(struct wpa_supplicant *wpa_s,
 591                                    struct nai_realm_eap *eap)
 592 {
 593         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
 594                 wpa_msg(wpa_s, MSG_DEBUG,
 595                         "nai-realm-cred-username: EAP method not supported: %d",
 596                         eap->method);
 597                 return 0; /* method not supported */
 598         }
 599
 600         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
 601             eap->method != EAP_TYPE_FAST) {
 602                 /* Only tunneled methods with username/password supported */
 603                 wpa_msg(wpa_s, MSG_DEBUG,
 604                         "nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST",
 605                         eap->method);
 606                 return 0;
 607         }
 608
 609         if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
 610                 if (eap->inner_method &&
 611                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
 612                         wpa_msg(wpa_s, MSG_DEBUG,
 613                                 "nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d",
 614                                 eap->inner_method);
 615                         return 0;
 616                 }
 617                 if (!eap->inner_method &&
 618                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) {
 619                         wpa_msg(wpa_s, MSG_DEBUG,
 620                                 "nai-realm-cred-username: MSCHAPv2 not supported");
 621                         return 0;
 622                 }
 623         }
 624
 625         if (eap->method == EAP_TYPE_TTLS) {
 626                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 627                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 628                 if (eap->inner_method &&
 629                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) {
 630                         wpa_msg(wpa_s, MSG_DEBUG,
 631                                 "nai-realm-cred-username: TTLS, but inner not supported: %d",
 632                                 eap->inner_method);
 633                         return 0;
 634                 }
 635                 if (eap->inner_non_eap &&
 636                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 637                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 638                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 639                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) {
 640                         wpa_msg(wpa_s, MSG_DEBUG,
 641                                 "nai-realm-cred-username: TTLS, inner-non-eap not supported: %d",
 642                                 eap->inner_non_eap);
 643                         return 0;
 644                 }
 645         }
 646
 647         if (eap->inner_method &&
 648             eap->inner_method != EAP_TYPE_GTC &&
 649             eap->inner_method != EAP_TYPE_MSCHAPV2) {
 650                 wpa_msg(wpa_s, MSG_DEBUG,
 651                         "nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d",
 652                         eap->inner_method);
 653                 return 0;
 654         }
 655
 656         return 1;
 657 }
 658
 659
 660 static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s,
 661                                struct nai_realm_eap *eap)
 662 {
 663         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) {
 664                 wpa_msg(wpa_s, MSG_DEBUG,
 665                         "nai-realm-cred-cert: Method not supported: %d",
 666                         eap->method);
 667                 return 0; /* method not supported */
 668         }
 669
 670         if (eap->method != EAP_TYPE_TLS) {
 671                 /* Only EAP-TLS supported for credential authentication */
 672                 wpa_msg(wpa_s, MSG_DEBUG,
 673                         "nai-realm-cred-cert: Method not TLS: %d",
 674                         eap->method);
 675                 return 0;
 676         }
 677
 678         return 1;
 679 }
 680
 681
 682 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
 683                                                  struct wpa_cred *cred,
 684                                                  struct nai_realm *realm)
 685 {
 686         u8 e;
 687
 688         if (cred->username == NULL ||
 689             cred->username[0] == '\0' ||
 690             ((cred->password == NULL ||
 691               cred->password[0] == '\0') &&
 692              (cred->private_key == NULL ||
 693               cred->private_key[0] == '\0'))) {
 694                 wpa_msg(wpa_s, MSG_DEBUG,
 695                         "nai-realm-find-eap: incomplete cred info: username: %s  password: %s private_key: %s",
 696                         cred->username ? cred->username : "NULL",
 697                         cred->password ? cred->password : "NULL",
 698                         cred->private_key ? cred->private_key : "NULL");
 699                 return NULL;
 700         }
 701
 702         for (e = 0; e < realm->eap_count; e++) {
 703                 struct nai_realm_eap *eap = &realm->eap[e];
 704                 if (cred->password && cred->password[0] &&
 705                     nai_realm_cred_username(wpa_s, eap))
 706                         return eap;
 707                 if (cred->private_key && cred->private_key[0] &&
 708                     nai_realm_cred_cert(wpa_s, eap))
 709                         return eap;
 710         }
 711
 712         return NULL;
 713 }
 714
 715
 716 #ifdef INTERWORKING_3GPP
 717
 718 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 719 {
 720         u8 plmn[3], plmn2[3];
 721         const u8 *pos, *end;
 722         u8 udhl;
 723
 724         /*
 725          * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
 726          * operator is allowed to include only two digits of the MNC, so allow
 727          * matches based on both two and three digit MNC assumptions. Since some
 728          * SIM/USIM cards may not expose MNC length conveniently, we may be
 729          * provided the default MNC length 3 here and as such, checking with MNC
 730          * length 2 is justifiable even though 3GPP TS 24.234 does not mention
 731          * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
 732          * with otherwise matching values would not be good idea in general, so
 733          * this should not result in selecting incorrect networks.
 734          */
 735         /* Match with 3 digit MNC */
 736         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 737         plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
 738         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 739         /* Match with 2 digit MNC */
 740         plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 741         plmn2[1] = (imsi[2] - '0') | 0xf0;
 742         plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 743
 744         if (anqp == NULL)
 745                 return 0;
 746         pos = wpabuf_head_u8(anqp);
 747         end = pos + wpabuf_len(anqp);
 748         if (pos + 2 > end)
 749                 return 0;
 750         if (*pos != 0) {
 751                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 752                 return 0;
 753         }
 754         pos++;
 755         udhl = *pos++;
 756         if (pos + udhl > end) {
 757                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 758                 return 0;
 759         }
 760         end = pos + udhl;
 761
 762         wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
 763                    plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
 764                    imsi, mnc_len);
 765
 766         while (pos + 2 <= end) {
 767                 u8 iei, len;
 768                 const u8 *l_end;
 769                 iei = *pos++;
 770                 len = *pos++ & 0x7f;
 771                 if (pos + len > end)
 772                         break;
 773                 l_end = pos + len;
 774
 775                 if (iei == 0 && len > 0) {
 776                         /* PLMN List */
 777                         u8 num, i;
 778                         wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
 779                                     pos, len);
 780                         num = *pos++;
 781                         for (i = 0; i < num; i++) {
 782                                 if (pos + 3 > l_end)
 783                                         break;
 784                                 if (os_memcmp(pos, plmn, 3) == 0 ||
 785                                     os_memcmp(pos, plmn2, 3) == 0)
 786                                         return 1; /* Found matching PLMN */
 787                                 pos += 3;
 788                         }
 789                 } else {
 790                         wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
 791                                     pos, len);
 792                 }
 793
 794                 pos = l_end;
 795         }
 796
 797         return 0;
 798 }
 799
 800
 801 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 802                           size_t mnc_len, char prefix)
 803 {
 804         const char *sep, *msin;
 805         char *end, *pos;
 806         size_t msin_len, plmn_len;
 807
 808         /*
 809          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 810          * Root NAI:
 811          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 812          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 813          */
 814
 815         if (imsi == NULL || os_strlen(imsi) > 16) {
 816                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 817                 return -1;
 818         }
 819         sep = os_strchr(imsi, '-');
 820         if (sep) {
 821                 plmn_len = sep - imsi;
 822                 msin = sep + 1;
 823         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 824                 plmn_len = 3 + mnc_len;
 825                 msin = imsi + plmn_len;
 826         } else
 827                 return -1;
 828         if (plmn_len != 5 && plmn_len != 6)
 829                 return -1;
 830         msin_len = os_strlen(msin);
 831
 832         pos = nai;
 833         end = nai + nai_len;
 834         if (prefix)
 835                 *pos++ = prefix;
 836         os_memcpy(pos, imsi, plmn_len);
 837         pos += plmn_len;
 838         os_memcpy(pos, msin, msin_len);
 839         pos += msin_len;
 840         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 841         if (plmn_len == 5) {
 842                 *pos++ = '0';
 843                 *pos++ = imsi[3];
 844                 *pos++ = imsi[4];
 845         } else {
 846                 *pos++ = imsi[3];
 847                 *pos++ = imsi[4];
 848                 *pos++ = imsi[5];
 849         }
 850         os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 851                     imsi[0], imsi[1], imsi[2]);
 852
 853         return 0;
 854 }
 855
 856
 857 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 858 {
 859         char nai[100];
 860         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 861                 return -1;
 862         return wpa_config_set_quoted(ssid, "identity", nai);
 863 }
 864
 865 #endif /* INTERWORKING_3GPP */
 866
 867
 868 static int already_connected(struct wpa_supplicant *wpa_s,
 869                              struct wpa_cred *cred, struct wpa_bss *bss)
 870 {
 871         struct wpa_ssid *ssid, *sel_ssid;
 872         struct wpa_bss *selected;
 873
 874         if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
 875                 return 0;
 876
 877         ssid = wpa_s->current_ssid;
 878         if (ssid->parent_cred != cred)
 879                 return 0;
 880
 881         if (ssid->ssid_len != bss->ssid_len ||
 882             os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 883                 return 0;
 884
 885         sel_ssid = NULL;
 886         selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
 887         if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
 888                 return 0; /* higher priority network in scan results */
 889
 890         return 1;
 891 }
 892
 893
 894 static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
 895                                      struct wpa_cred *cred,
 896                                      struct wpa_bss *bss)
 897 {
 898         struct wpa_ssid *ssid;
 899
 900         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 901                 if (ssid->parent_cred != cred)
 902                         continue;
 903                 if (ssid->ssid_len != bss->ssid_len ||
 904                     os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
 905                         continue;
 906
 907                 break;
 908         }
 909
 910         if (ssid == NULL)
 911                 return;
 912
 913         wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
 914
 915         if (ssid == wpa_s->current_ssid) {
 916                 wpa_sm_set_config(wpa_s->wpa, NULL);
 917                 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 918                 wpa_supplicant_deauthenticate(wpa_s,
 919                                               WLAN_REASON_DEAUTH_LEAVING);
 920         }
 921
 922         wpas_notify_network_removed(wpa_s, ssid);
 923         wpa_config_remove_network(wpa_s->conf, ssid->id);
 924 }
 925
 926
 927 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 928                                         struct wpa_ssid *ssid)
 929 {
 930         const char *key_mgmt = NULL;
 931 #ifdef CONFIG_IEEE80211R
 932         int res;
 933         struct wpa_driver_capa capa;
 934
 935         res = wpa_drv_get_capa(wpa_s, &capa);
 936         if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
 937                 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 938                         "WPA-EAP WPA-EAP-SHA256 FT-EAP" :
 939                         "WPA-EAP FT-EAP";
 940         }
 941 #endif /* CONFIG_IEEE80211R */
 942
 943         if (!key_mgmt)
 944                 key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 945                         "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
 946         if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0)
 947                 return -1;
 948         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 949                 return -1;
 950         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 951                 return -1;
 952         return 0;
 953 }
 954
 955
 956 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 957                                      struct wpa_cred *cred,
 958                                      struct wpa_bss *bss, int only_add)
 959 {
 960 #ifdef INTERWORKING_3GPP
 961         struct wpa_ssid *ssid;
 962         int eap_type;
 963         int res;
 964         char prefix;
 965
 966         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 967                 return -1;
 968
 969         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
 970                 " (3GPP)", MAC2STR(bss->bssid));
 971
 972         if (already_connected(wpa_s, cred, bss)) {
 973                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
 974                         MAC2STR(bss->bssid));
 975                 return wpa_s->current_ssid->id;
 976         }
 977
 978         remove_duplicate_network(wpa_s, cred, bss);
 979
 980         ssid = wpa_config_add_network(wpa_s->conf);
 981         if (ssid == NULL)
 982                 return -1;
 983         ssid->parent_cred = cred;
 984
 985         wpas_notify_network_added(wpa_s, ssid);
 986         wpa_config_set_network_defaults(ssid);
 987         ssid->priority = cred->priority;
 988         ssid->temporary = 1;
 989         ssid->ssid = os_zalloc(bss->ssid_len + 1);
 990         if (ssid->ssid == NULL)
 991                 goto fail;
 992         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 993         ssid->ssid_len = bss->ssid_len;
 994         ssid->eap.sim_num = cred->sim_num;
 995
 996         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 997                 goto fail;
 998
 999         eap_type = EAP_TYPE_SIM;
1000         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
1001                 eap_type = EAP_TYPE_AKA;
1002         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
1003                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
1004                     cred->eap_method[0].method == EAP_TYPE_AKA ||
1005                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
1006                         eap_type = cred->eap_method[0].method;
1007         }
1008
1009         switch (eap_type) {
1010         case EAP_TYPE_SIM:
1011                 prefix = '1';
1012                 res = wpa_config_set(ssid, "eap", "SIM", 0);
1013                 break;
1014         case EAP_TYPE_AKA:
1015                 prefix = '0';
1016                 res = wpa_config_set(ssid, "eap", "AKA", 0);
1017                 break;
1018         case EAP_TYPE_AKA_PRIME:
1019                 prefix = '6';
1020                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
1021                 break;
1022         default:
1023                 res = -1;
1024                 break;
1025         }
1026         if (res < 0) {
1027                 wpa_msg(wpa_s, MSG_DEBUG,
1028                         "Selected EAP method (%d) not supported", eap_type);
1029                 goto fail;
1030         }
1031
1032         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
1033                 wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI");
1034                 goto fail;
1035         }
1036
1037         if (cred->milenage && cred->milenage[0]) {
1038                 if (wpa_config_set_quoted(ssid, "password",
1039                                           cred->milenage) < 0)
1040                         goto fail;
1041         } else if (cred->pcsc) {
1042                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
1043                         goto fail;
1044                 if (wpa_s->conf->pcsc_pin &&
1045                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
1046                     < 0)
1047                         goto fail;
1048         }
1049
1050         wpa_s->next_ssid = ssid;
1051         wpa_config_update_prio_list(wpa_s->conf);
1052         if (!only_add)
1053                 interworking_reconnect(wpa_s);
1054
1055         return ssid->id;
1056
1057 fail:
1058         wpas_notify_network_removed(wpa_s, ssid);
1059         wpa_config_remove_network(wpa_s->conf, ssid->id);
1060 #endif /* INTERWORKING_3GPP */
1061         return -1;
1062 }
1063
1064
1065 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
1066                                             size_t rc_len)
1067 {
1068         const u8 *pos, *end;
1069         u8 lens;
1070
1071         if (ie == NULL)
1072                 return 0;
1073
1074         pos = ie + 2;
1075         end = ie + 2 + ie[1];
1076
1077         /* Roaming Consortium element:
1078          * Number of ANQP OIs
1079          * OI #1 and #2 lengths
1080          * OI #1, [OI #2], [OI #3]
1081          */
1082
1083         if (pos + 2 > end)
1084                 return 0;
1085
1086         pos++; /* skip Number of ANQP OIs */
1087         lens = *pos++;
1088         if (pos + (lens & 0x0f) + (lens >> 4) > end)
1089                 return 0;
1090
1091         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1092                 return 1;
1093         pos += lens & 0x0f;
1094
1095         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1096                 return 1;
1097         pos += lens >> 4;
1098
1099         if (pos < end && (size_t) (end - pos) == rc_len &&
1100             os_memcmp(pos, rc_id, rc_len) == 0)
1101                 return 1;
1102
1103         return 0;
1104 }
1105
1106
1107 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
1108                                          const u8 *rc_id, size_t rc_len)
1109 {
1110         const u8 *pos, *end;
1111         u8 len;
1112
1113         if (anqp == NULL)
1114                 return 0;
1115
1116         pos = wpabuf_head(anqp);
1117         end = pos + wpabuf_len(anqp);
1118
1119         /* Set of <OI Length, OI> duples */
1120         while (pos < end) {
1121                 len = *pos++;
1122                 if (pos + len > end)
1123                         break;
1124                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
1125                         return 1;
1126                 pos += len;
1127         }
1128
1129         return 0;
1130 }
1131
1132
1133 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
1134                                     const u8 *rc_id, size_t rc_len)
1135 {
1136         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
1137                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
1138 }
1139
1140
1141 static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
1142 {
1143         const u8 *ie;
1144
1145         if (cred->required_roaming_consortium_len == 0)
1146                 return 0;
1147
1148         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1149
1150         if (ie == NULL &&
1151             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1152                 return 1;
1153
1154         return !roaming_consortium_match(ie,
1155                                          bss->anqp ?
1156                                          bss->anqp->roaming_consortium : NULL,
1157                                          cred->required_roaming_consortium,
1158                                          cred->required_roaming_consortium_len);
1159 }
1160
1161
1162 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
1163 {
1164         size_t i;
1165
1166         if (!cred->excluded_ssid)
1167                 return 0;
1168
1169         for (i = 0; i < cred->num_excluded_ssid; i++) {
1170                 struct excluded_ssid *e = &cred->excluded_ssid[i];
1171                 if (bss->ssid_len == e->ssid_len &&
1172                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
1173                         return 1;
1174         }
1175
1176         return 0;
1177 }
1178
1179
1180 static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
1181                                    struct wpa_cred *cred, struct wpa_bss *bss)
1182 {
1183         int res;
1184         unsigned int dl_bandwidth, ul_bandwidth;
1185         const u8 *wan;
1186         u8 wan_info, dl_load, ul_load;
1187         u16 lmd;
1188         u32 ul_speed, dl_speed;
1189
1190         if (!cred->min_dl_bandwidth_home &&
1191             !cred->min_ul_bandwidth_home &&
1192             !cred->min_dl_bandwidth_roaming &&
1193             !cred->min_ul_bandwidth_roaming)
1194                 return 0; /* No bandwidth constraint specified */
1195
1196         if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
1197                 return 0; /* No WAN Metrics known - ignore constraint */
1198
1199         wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
1200         wan_info = wan[0];
1201         if (wan_info & BIT(3))
1202                 return 1; /* WAN link at capacity */
1203         lmd = WPA_GET_LE16(wan + 11);
1204         if (lmd == 0)
1205                 return 0; /* Downlink/Uplink Load was not measured */
1206         dl_speed = WPA_GET_LE32(wan + 1);
1207         ul_speed = WPA_GET_LE32(wan + 5);
1208         dl_load = wan[9];
1209         ul_load = wan[10];
1210
1211         if (dl_speed >= 0xffffff)
1212                 dl_bandwidth = dl_speed / 255 * (255 - dl_load);
1213         else
1214                 dl_bandwidth = dl_speed * (255 - dl_load) / 255;
1215
1216         if (ul_speed >= 0xffffff)
1217                 ul_bandwidth = ul_speed / 255 * (255 - ul_load);
1218         else
1219                 ul_bandwidth = ul_speed * (255 - ul_load) / 255;
1220
1221         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1222                                         bss->anqp->domain_name : NULL);
1223         if (res > 0) {
1224                 if (cred->min_dl_bandwidth_home > dl_bandwidth)
1225                         return 1;
1226                 if (cred->min_ul_bandwidth_home > ul_bandwidth)
1227                         return 1;
1228         } else {
1229                 if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
1230                         return 1;
1231                 if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
1232                         return 1;
1233         }
1234
1235         return 0;
1236 }
1237
1238
1239 static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
1240                                   struct wpa_cred *cred, struct wpa_bss *bss)
1241 {
1242         const u8 *ie;
1243         int res;
1244
1245         if (!cred->max_bss_load)
1246                 return 0; /* No BSS Load constraint specified */
1247
1248         ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
1249         if (ie == NULL || ie[1] < 3)
1250                 return 0; /* No BSS Load advertised */
1251
1252         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1253                                         bss->anqp->domain_name : NULL);
1254         if (res <= 0)
1255                 return 0; /* Not a home network */
1256
1257         return ie[4] > cred->max_bss_load;
1258 }
1259
1260
1261 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
1262 {
1263         while (pos + 4 <= end) {
1264                 if (pos[0] == proto && pos[3] == 1 /* Open */)
1265                         return 1;
1266                 pos += 4;
1267         }
1268
1269         return 0;
1270 }
1271
1272
1273 static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
1274                                 u16 port)
1275 {
1276         while (pos + 4 <= end) {
1277                 if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
1278                     pos[3] == 1 /* Open */)
1279                         return 1;
1280                 pos += 4;
1281         }
1282
1283         return 0;
1284 }
1285
1286
1287 static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
1288                                    struct wpa_cred *cred, struct wpa_bss *bss)
1289 {
1290         int res;
1291         const u8 *capab, *end;
1292         unsigned int i, j;
1293         int *ports;
1294
1295         if (!cred->num_req_conn_capab)
1296                 return 0; /* No connection capability constraint specified */
1297
1298         if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
1299                 return 0; /* No Connection Capability known - ignore constraint
1300                            */
1301
1302         res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
1303                                         bss->anqp->domain_name : NULL);
1304         if (res > 0)
1305                 return 0; /* No constraint in home network */
1306
1307         capab = wpabuf_head(bss->anqp->hs20_connection_capability);
1308         end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
1309
1310         for (i = 0; i < cred->num_req_conn_capab; i++) {
1311                 ports = cred->req_conn_capab_port[i];
1312                 if (!ports) {
1313                         if (!has_proto_match(capab, end,
1314                                              cred->req_conn_capab_proto[i]))
1315                                 return 1;
1316                 } else {
1317                         for (j = 0; ports[j] > -1; j++) {
1318                                 if (!has_proto_port_match(
1319                                             capab, end,
1320                                             cred->req_conn_capab_proto[i],
1321                                             ports[j]))
1322                                         return 1;
1323                         }
1324                 }
1325         }
1326
1327         return 0;
1328 }
1329
1330
1331 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
1332         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1333         int *excluded)
1334 {
1335         struct wpa_cred *cred, *selected = NULL;
1336         const u8 *ie;
1337         int is_excluded = 0;
1338
1339         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
1340
1341         if (ie == NULL &&
1342             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
1343                 return NULL;
1344
1345         if (wpa_s->conf->cred == NULL)
1346                 return NULL;
1347
1348         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1349                 if (cred->roaming_consortium_len == 0)
1350                         continue;
1351
1352                 if (!roaming_consortium_match(ie,
1353                                               bss->anqp ?
1354                                               bss->anqp->roaming_consortium :
1355                                               NULL,
1356                                               cred->roaming_consortium,
1357                                               cred->roaming_consortium_len))
1358                         continue;
1359
1360                 if (cred_no_required_oi_match(cred, bss))
1361                         continue;
1362                 if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
1363                         continue;
1364                 if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
1365                         continue;
1366                 if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
1367                         continue;
1368                 if (cred_excluded_ssid(cred, bss)) {
1369                         if (excluded == NULL)
1370                                 continue;
1371                         if (selected == NULL) {
1372                                 selected = cred;
1373                                 is_excluded = 1;
1374                         }
1375                 } else {
1376                         if (selected == NULL || is_excluded ||
1377                             cred_prio_cmp(selected, cred) < 0) {
1378                                 selected = cred;
1379                                 is_excluded = 0;
1380                         }
1381                 }
1382         }
1383
1384         if (excluded)
1385                 *excluded = is_excluded;
1386
1387         return selected;
1388 }
1389
1390
1391 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1392                                        struct wpa_cred *cred, int ttls)
1393 {
1394         if (cred->eap_method) {
1395                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1396                         cred->eap_method->method == EAP_TYPE_TTLS;
1397
1398                 os_free(ssid->eap.eap_methods);
1399                 ssid->eap.eap_methods =
1400                         os_malloc(sizeof(struct eap_method_type) * 2);
1401                 if (ssid->eap.eap_methods == NULL)
1402                         return -1;
1403                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1404                           sizeof(*cred->eap_method));
1405                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1406                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1407         }
1408
1409         if (ttls && cred->username && cred->username[0]) {
1410                 const char *pos;
1411                 char *anon;
1412                 /* Use anonymous NAI in Phase 1 */
1413                 pos = os_strchr(cred->username, '@');
1414                 if (pos) {
1415                         size_t buflen = 9 + os_strlen(pos) + 1;
1416                         anon = os_malloc(buflen);
1417                         if (anon == NULL)
1418                                 return -1;
1419                         os_snprintf(anon, buflen, "anonymous%s", pos);
1420                 } else if (cred->realm) {
1421                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1422                         anon = os_malloc(buflen);
1423                         if (anon == NULL)
1424                                 return -1;
1425                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1426                 } else {
1427                         anon = os_strdup("anonymous");
1428                         if (anon == NULL)
1429                                 return -1;
1430                 }
1431                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1432                     0) {
1433                         os_free(anon);
1434                         return -1;
1435                 }
1436                 os_free(anon);
1437         }
1438
1439         if (cred->username && cred->username[0] &&
1440             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1441                 return -1;
1442
1443         if (cred->password && cred->password[0]) {
1444                 if (cred->ext_password &&
1445                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1446                         return -1;
1447                 if (!cred->ext_password &&
1448                     wpa_config_set_quoted(ssid, "password", cred->password) <
1449                     0)
1450                         return -1;
1451         }
1452
1453         if (cred->client_cert && cred->client_cert[0] &&
1454             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1455                 return -1;
1456
1457 #ifdef ANDROID
1458         if (cred->private_key &&
1459             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1460                 /* Use OpenSSL engine configuration for Android keystore */
1461                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1462                     wpa_config_set_quoted(ssid, "key_id",
1463                                           cred->private_key + 11) < 0 ||
1464                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1465                         return -1;
1466         } else
1467 #endif /* ANDROID */
1468         if (cred->private_key && cred->private_key[0] &&
1469             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1470                 return -1;
1471
1472         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1473             wpa_config_set_quoted(ssid, "private_key_passwd",
1474                                   cred->private_key_passwd) < 0)
1475                 return -1;
1476
1477         if (cred->phase1) {
1478                 os_free(ssid->eap.phase1);
1479                 ssid->eap.phase1 = os_strdup(cred->phase1);
1480         }
1481         if (cred->phase2) {
1482                 os_free(ssid->eap.phase2);
1483                 ssid->eap.phase2 = os_strdup(cred->phase2);
1484         }
1485
1486         if (cred->ca_cert && cred->ca_cert[0] &&
1487             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1488                 return -1;
1489
1490         if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
1491             wpa_config_set_quoted(ssid, "domain_suffix_match",
1492                                   cred->domain_suffix_match) < 0)
1493                 return -1;
1494
1495         ssid->eap.ocsp = cred->ocsp;
1496
1497         return 0;
1498 }
1499
1500
1501 static int interworking_connect_roaming_consortium(
1502         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1503         struct wpa_bss *bss, int only_add)
1504 {
1505         struct wpa_ssid *ssid;
1506
1507         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR
1508                 " based on roaming consortium match", MAC2STR(bss->bssid));
1509
1510         if (already_connected(wpa_s, cred, bss)) {
1511                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1512                         MAC2STR(bss->bssid));
1513                 return wpa_s->current_ssid->id;
1514         }
1515
1516         remove_duplicate_network(wpa_s, cred, bss);
1517
1518         ssid = wpa_config_add_network(wpa_s->conf);
1519         if (ssid == NULL)
1520                 return -1;
1521         ssid->parent_cred = cred;
1522         wpas_notify_network_added(wpa_s, ssid);
1523         wpa_config_set_network_defaults(ssid);
1524         ssid->priority = cred->priority;
1525         ssid->temporary = 1;
1526         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1527         if (ssid->ssid == NULL)
1528                 goto fail;
1529         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1530         ssid->ssid_len = bss->ssid_len;
1531
1532         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1533                 goto fail;
1534
1535         if (cred->eap_method == NULL) {
1536                 wpa_msg(wpa_s, MSG_DEBUG,
1537                         "Interworking: No EAP method set for credential using roaming consortium");
1538                 goto fail;
1539         }
1540
1541         if (interworking_set_eap_params(
1542                     ssid, cred,
1543                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1544                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1545                 goto fail;
1546
1547         wpa_s->next_ssid = ssid;
1548         wpa_config_update_prio_list(wpa_s->conf);
1549         if (!only_add)
1550                 interworking_reconnect(wpa_s);
1551
1552         return ssid->id;
1553
1554 fail:
1555         wpas_notify_network_removed(wpa_s, ssid);
1556         wpa_config_remove_network(wpa_s->conf, ssid->id);
1557         return -1;
1558 }
1559
1560
1561 static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
1562                                        struct wpa_bss *bss, int allow_excluded,
1563                                        int only_add)
1564 {
1565         struct wpa_cred *cred, *cred_rc, *cred_3gpp;
1566         struct wpa_ssid *ssid;
1567         struct nai_realm *realm;
1568         struct nai_realm_eap *eap = NULL;
1569         u16 count, i;
1570         char buf[100];
1571         int excluded = 0, *excl = allow_excluded ? &excluded : NULL;
1572         const char *name;
1573
1574         if (wpa_s->conf->cred == NULL || bss == NULL)
1575                 return -1;
1576         if (disallowed_bssid(wpa_s, bss->bssid) ||
1577             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
1578                 wpa_msg(wpa_s, MSG_DEBUG,
1579                         "Interworking: Reject connection to disallowed BSS "
1580                         MACSTR, MAC2STR(bss->bssid));
1581                 return -1;
1582         }
1583
1584         wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
1585                    " for connection (allow_excluded=%d)",
1586                    MAC2STR(bss->bssid), allow_excluded);
1587
1588         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1589                 /*
1590                  * We currently support only HS 2.0 networks and those are
1591                  * required to use WPA2-Enterprise.
1592                  */
1593                 wpa_msg(wpa_s, MSG_DEBUG,
1594                         "Interworking: Network does not use RSN");
1595                 return -1;
1596         }
1597
1598         cred_rc = interworking_credentials_available_roaming_consortium(
1599                 wpa_s, bss, 0, excl);
1600         if (cred_rc) {
1601                 wpa_msg(wpa_s, MSG_DEBUG,
1602                         "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d",
1603                         cred_rc->priority, cred_rc->sp_priority);
1604                 if (allow_excluded && excl && !(*excl))
1605                         excl = NULL;
1606         }
1607
1608         cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
1609         if (cred) {
1610                 wpa_msg(wpa_s, MSG_DEBUG,
1611                         "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d",
1612                         cred->priority, cred->sp_priority);
1613                 if (allow_excluded && excl && !(*excl))
1614                         excl = NULL;
1615         }
1616
1617         cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
1618                                                             excl);
1619         if (cred_3gpp) {
1620                 wpa_msg(wpa_s, MSG_DEBUG,
1621                         "Interworking: Highest 3GPP matching credential priority %d sp_priority %d",
1622                         cred_3gpp->priority, cred_3gpp->sp_priority);
1623                 if (allow_excluded && excl && !(*excl))
1624                         excl = NULL;
1625         }
1626
1627         if (!cred_rc && !cred && !cred_3gpp) {
1628                 wpa_msg(wpa_s, MSG_DEBUG,
1629                         "Interworking: No full credential matches - consider options without BW(etc.) limits");
1630                 cred_rc = interworking_credentials_available_roaming_consortium(
1631                         wpa_s, bss, 1, excl);
1632                 if (cred_rc) {
1633                         wpa_msg(wpa_s, MSG_DEBUG,
1634                                 "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)",
1635                                 cred_rc->priority, cred_rc->sp_priority);
1636                         if (allow_excluded && excl && !(*excl))
1637                                 excl = NULL;
1638                 }
1639
1640                 cred = interworking_credentials_available_realm(wpa_s, bss, 1,
1641                                                                 excl);
1642                 if (cred) {
1643                         wpa_msg(wpa_s, MSG_DEBUG,
1644                                 "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)",
1645                                 cred->priority, cred->sp_priority);
1646                         if (allow_excluded && excl && !(*excl))
1647                                 excl = NULL;
1648                 }
1649
1650                 cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1651                                                                     1, excl);
1652                 if (cred_3gpp) {
1653                         wpa_msg(wpa_s, MSG_DEBUG,
1654                                 "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)",
1655                                 cred_3gpp->priority, cred_3gpp->sp_priority);
1656                         if (allow_excluded && excl && !(*excl))
1657                                 excl = NULL;
1658                 }
1659         }
1660
1661         if (cred_rc &&
1662             (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
1663             (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
1664                 return interworking_connect_roaming_consortium(wpa_s, cred_rc,
1665                                                                bss, only_add);
1666
1667         if (cred_3gpp &&
1668             (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
1669                 return interworking_connect_3gpp(wpa_s, cred_3gpp, bss,
1670                                                  only_add);
1671         }
1672
1673         if (cred == NULL) {
1674                 wpa_msg(wpa_s, MSG_DEBUG,
1675                         "Interworking: No matching credentials found for "
1676                         MACSTR, MAC2STR(bss->bssid));
1677                 return -1;
1678         }
1679
1680         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1681                                 &count);
1682         if (realm == NULL) {
1683                 wpa_msg(wpa_s, MSG_DEBUG,
1684                         "Interworking: Could not parse NAI Realm list from "
1685                         MACSTR, MAC2STR(bss->bssid));
1686                 return -1;
1687         }
1688
1689         for (i = 0; i < count; i++) {
1690                 if (!nai_realm_match(&realm[i], cred->realm))
1691                         continue;
1692                 eap = nai_realm_find_eap(wpa_s, cred, &realm[i]);
1693                 if (eap)
1694                         break;
1695         }
1696
1697         if (!eap) {
1698                 wpa_msg(wpa_s, MSG_DEBUG,
1699                         "Interworking: No matching credentials and EAP method found for "
1700                         MACSTR, MAC2STR(bss->bssid));
1701                 nai_realm_free(realm, count);
1702                 return -1;
1703         }
1704
1705         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR,
1706                 MAC2STR(bss->bssid));
1707
1708         if (already_connected(wpa_s, cred, bss)) {
1709                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
1710                         MAC2STR(bss->bssid));
1711                 nai_realm_free(realm, count);
1712                 return 0;
1713         }
1714
1715         remove_duplicate_network(wpa_s, cred, bss);
1716
1717         ssid = wpa_config_add_network(wpa_s->conf);
1718         if (ssid == NULL) {
1719                 nai_realm_free(realm, count);
1720                 return -1;
1721         }
1722         ssid->parent_cred = cred;
1723         wpas_notify_network_added(wpa_s, ssid);
1724         wpa_config_set_network_defaults(ssid);
1725         ssid->priority = cred->priority;
1726         ssid->temporary = 1;
1727         ssid->ssid = os_zalloc(bss->ssid_len + 1);
1728         if (ssid->ssid == NULL)
1729                 goto fail;
1730         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
1731         ssid->ssid_len = bss->ssid_len;
1732
1733         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1734                 goto fail;
1735
1736         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1737                                                      eap->method), 0) < 0)
1738                 goto fail;
1739
1740         switch (eap->method) {
1741         case EAP_TYPE_TTLS:
1742                 if (eap->inner_method) {
1743                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1744                                     eap_get_name(EAP_VENDOR_IETF,
1745                                                  eap->inner_method));
1746                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1747                                 goto fail;
1748                         break;
1749                 }
1750                 switch (eap->inner_non_eap) {
1751                 case NAI_REALM_INNER_NON_EAP_PAP:
1752                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1753                             0)
1754                                 goto fail;
1755                         break;
1756                 case NAI_REALM_INNER_NON_EAP_CHAP:
1757                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1758                             < 0)
1759                                 goto fail;
1760                         break;
1761                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1762                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1763                                            0) < 0)
1764                                 goto fail;
1765                         break;
1766                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1767                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1768                                            0) < 0)
1769                                 goto fail;
1770                         break;
1771                 default:
1772                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1773                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1774                                            0) < 0)
1775                                 goto fail;
1776                         break;
1777                 }
1778                 break;
1779         case EAP_TYPE_PEAP:
1780         case EAP_TYPE_FAST:
1781                 if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
1782                                    0) < 0)
1783                         goto fail;
1784                 if (wpa_config_set(ssid, "pac_file",
1785                                    "\"blob://pac_interworking\"", 0) < 0)
1786                         goto fail;
1787                 name = eap_get_name(EAP_VENDOR_IETF,
1788                                     eap->inner_method ? eap->inner_method :
1789                                     EAP_TYPE_MSCHAPV2);
1790                 if (name == NULL)
1791                         goto fail;
1792                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
1793                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1794                         goto fail;
1795                 break;
1796         case EAP_TYPE_TLS:
1797                 break;
1798         }
1799
1800         if (interworking_set_eap_params(ssid, cred,
1801                                         eap->method == EAP_TYPE_TTLS) < 0)
1802                 goto fail;
1803
1804         nai_realm_free(realm, count);
1805
1806         wpa_s->next_ssid = ssid;
1807         wpa_config_update_prio_list(wpa_s->conf);
1808         if (!only_add)
1809                 interworking_reconnect(wpa_s);
1810
1811         return ssid->id;
1812
1813 fail:
1814         wpas_notify_network_removed(wpa_s, ssid);
1815         wpa_config_remove_network(wpa_s->conf, ssid->id);
1816         nai_realm_free(realm, count);
1817         return -1;
1818 }
1819
1820
1821 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
1822                          int only_add)
1823 {
1824         return interworking_connect_helper(wpa_s, bss, 1, only_add);
1825 }
1826
1827
1828 #ifdef PCSC_FUNCS
1829 static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
1830 {
1831         size_t len;
1832
1833         if (wpa_s->imsi[0] && wpa_s->mnc_len)
1834                 return 0;
1835
1836         len = sizeof(wpa_s->imsi) - 1;
1837         if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
1838                 scard_deinit(wpa_s->scard);
1839                 wpa_s->scard = NULL;
1840                 wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
1841                 return -1;
1842         }
1843         wpa_s->imsi[len] = '\0';
1844         wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
1845         wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
1846                    wpa_s->imsi, wpa_s->mnc_len);
1847
1848         return 0;
1849 }
1850 #endif /* PCSC_FUNCS */
1851
1852
1853 static struct wpa_cred * interworking_credentials_available_3gpp(
1854         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1855         int *excluded)
1856 {
1857         struct wpa_cred *selected = NULL;
1858 #ifdef INTERWORKING_3GPP
1859         struct wpa_cred *cred;
1860         int ret;
1861         int is_excluded = 0;
1862
1863         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) {
1864                 wpa_msg(wpa_s, MSG_DEBUG,
1865                         "interworking-avail-3gpp: not avail, anqp: %p  anqp_3gpp: %p",
1866                         bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL);
1867                 return NULL;
1868         }
1869
1870 #ifdef CONFIG_EAP_PROXY
1871         if (!wpa_s->imsi[0]) {
1872                 size_t len;
1873                 wpa_msg(wpa_s, MSG_DEBUG,
1874                         "Interworking: IMSI not available - try to read again through eap_proxy");
1875                 wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
1876                                                              wpa_s->imsi,
1877                                                              &len);
1878                 if (wpa_s->mnc_len > 0) {
1879                         wpa_s->imsi[len] = '\0';
1880                         wpa_msg(wpa_s, MSG_DEBUG,
1881                                 "eap_proxy: IMSI %s (MNC length %d)",
1882                                 wpa_s->imsi, wpa_s->mnc_len);
1883                 } else {
1884                         wpa_msg(wpa_s, MSG_DEBUG,
1885                                 "eap_proxy: IMSI not available");
1886                 }
1887         }
1888 #endif /* CONFIG_EAP_PROXY */
1889
1890         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1891                 char *sep;
1892                 const char *imsi;
1893                 int mnc_len;
1894                 char imsi_buf[16];
1895                 size_t msin_len;
1896
1897 #ifdef PCSC_FUNCS
1898                 if (cred->pcsc && wpa_s->scard) {
1899                         if (interworking_pcsc_read_imsi(wpa_s) < 0)
1900                                 continue;
1901                         imsi = wpa_s->imsi;
1902                         mnc_len = wpa_s->mnc_len;
1903                         goto compare;
1904                 }
1905 #endif /* PCSC_FUNCS */
1906 #ifdef CONFIG_EAP_PROXY
1907                 if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
1908                         imsi = wpa_s->imsi;
1909                         mnc_len = wpa_s->mnc_len;
1910                         goto compare;
1911                 }
1912 #endif /* CONFIG_EAP_PROXY */
1913
1914                 if (cred->imsi == NULL || !cred->imsi[0] ||
1915                     (!wpa_s->conf->external_sim &&
1916                      (cred->milenage == NULL || !cred->milenage[0])))
1917                         continue;
1918
1919                 sep = os_strchr(cred->imsi, '-');
1920                 if (sep == NULL ||
1921                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1922                         continue;
1923                 mnc_len = sep - cred->imsi - 3;
1924                 os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
1925                 sep++;
1926                 msin_len = os_strlen(cred->imsi);
1927                 if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
1928                         msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
1929                 os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
1930                 imsi_buf[3 + mnc_len + msin_len] = '\0';
1931                 imsi = imsi_buf;
1932
1933 #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
1934         compare:
1935 #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
1936                 wpa_msg(wpa_s, MSG_DEBUG,
1937                         "Interworking: Parsing 3GPP info from " MACSTR,
1938                         MAC2STR(bss->bssid));
1939                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1940                 wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound",
1941                         ret ? "" : "not ");
1942                 if (ret) {
1943                         if (cred_no_required_oi_match(cred, bss))
1944                                 continue;
1945                         if (!ignore_bw &&
1946                             cred_below_min_backhaul(wpa_s, cred, bss))
1947                                 continue;
1948                         if (!ignore_bw &&
1949                             cred_over_max_bss_load(wpa_s, cred, bss))
1950                                 continue;
1951                         if (!ignore_bw &&
1952                             cred_conn_capab_missing(wpa_s, cred, bss))
1953                                 continue;
1954                         if (cred_excluded_ssid(cred, bss)) {
1955                                 if (excluded == NULL)
1956                                         continue;
1957                                 if (selected == NULL) {
1958                                         selected = cred;
1959                                         is_excluded = 1;
1960                                 }
1961                         } else {
1962                                 if (selected == NULL || is_excluded ||
1963                                     cred_prio_cmp(selected, cred) < 0) {
1964                                         selected = cred;
1965                                         is_excluded = 0;
1966                                 }
1967                         }
1968                 }
1969         }
1970
1971         if (excluded)
1972                 *excluded = is_excluded;
1973 #endif /* INTERWORKING_3GPP */
1974         return selected;
1975 }
1976
1977
1978 static struct wpa_cred * interworking_credentials_available_realm(
1979         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
1980         int *excluded)
1981 {
1982         struct wpa_cred *cred, *selected = NULL;
1983         struct nai_realm *realm;
1984         u16 count, i;
1985         int is_excluded = 0;
1986
1987         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1988                 return NULL;
1989
1990         if (wpa_s->conf->cred == NULL)
1991                 return NULL;
1992
1993         wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1994                 MACSTR, MAC2STR(bss->bssid));
1995         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1996         if (realm == NULL) {
1997                 wpa_msg(wpa_s, MSG_DEBUG,
1998                         "Interworking: Could not parse NAI Realm list from "
1999                         MACSTR, MAC2STR(bss->bssid));
2000                 return NULL;
2001         }
2002
2003         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2004                 if (cred->realm == NULL)
2005                         continue;
2006
2007                 for (i = 0; i < count; i++) {
2008                         if (!nai_realm_match(&realm[i], cred->realm))
2009                                 continue;
2010                         if (nai_realm_find_eap(wpa_s, cred, &realm[i])) {
2011                                 if (cred_no_required_oi_match(cred, bss))
2012                                         continue;
2013                                 if (!ignore_bw &&
2014                                     cred_below_min_backhaul(wpa_s, cred, bss))
2015                                         continue;
2016                                 if (!ignore_bw &&
2017                                     cred_over_max_bss_load(wpa_s, cred, bss))
2018                                         continue;
2019                                 if (!ignore_bw &&
2020                                     cred_conn_capab_missing(wpa_s, cred, bss))
2021                                         continue;
2022                                 if (cred_excluded_ssid(cred, bss)) {
2023                                         if (excluded == NULL)
2024                                                 continue;
2025                                         if (selected == NULL) {
2026                                                 selected = cred;
2027                                                 is_excluded = 1;
2028                                         }
2029                                 } else {
2030                                         if (selected == NULL || is_excluded ||
2031                                             cred_prio_cmp(selected, cred) < 0)
2032                                         {
2033                                                 selected = cred;
2034                                                 is_excluded = 0;
2035                                         }
2036                                 }
2037                                 break;
2038                         } else {
2039                                 wpa_msg(wpa_s, MSG_DEBUG,
2040                                         "Interworking: realm-find-eap returned false");
2041                         }
2042                 }
2043         }
2044
2045         nai_realm_free(realm, count);
2046
2047         if (excluded)
2048                 *excluded = is_excluded;
2049
2050         return selected;
2051 }
2052
2053
2054 static struct wpa_cred * interworking_credentials_available_helper(
2055         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
2056         int *excluded)
2057 {
2058         struct wpa_cred *cred, *cred2;
2059         int excluded1, excluded2;
2060
2061         if (disallowed_bssid(wpa_s, bss->bssid) ||
2062             disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
2063                 wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
2064                            MACSTR, MAC2STR(bss->bssid));
2065                 return NULL;
2066         }
2067
2068         cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
2069                                                         &excluded1);
2070         cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
2071                                                         &excluded2);
2072         if (cred && cred2 &&
2073             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2074                 cred = cred2;
2075                 excluded1 = excluded2;
2076         }
2077         if (!cred) {
2078                 cred = cred2;
2079                 excluded1 = excluded2;
2080         }
2081
2082         cred2 = interworking_credentials_available_roaming_consortium(
2083                 wpa_s, bss, ignore_bw, &excluded2);
2084         if (cred && cred2 &&
2085             (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
2086                 cred = cred2;
2087                 excluded1 = excluded2;
2088         }
2089         if (!cred) {
2090                 cred = cred2;
2091                 excluded1 = excluded2;
2092         }
2093
2094         if (excluded)
2095                 *excluded = excluded1;
2096         return cred;
2097 }
2098
2099
2100 static struct wpa_cred * interworking_credentials_available(
2101         struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
2102 {
2103         struct wpa_cred *cred;
2104
2105         if (excluded)
2106                 *excluded = 0;
2107         cred = interworking_credentials_available_helper(wpa_s, bss, 0,
2108                                                          excluded);
2109         if (cred)
2110                 return cred;
2111         return interworking_credentials_available_helper(wpa_s, bss, 1,
2112                                                          excluded);
2113 }
2114
2115
2116 int domain_name_list_contains(struct wpabuf *domain_names,
2117                               const char *domain, int exact_match)
2118 {
2119         const u8 *pos, *end;
2120         size_t len;
2121
2122         len = os_strlen(domain);
2123         pos = wpabuf_head(domain_names);
2124         end = pos + wpabuf_len(domain_names);
2125
2126         while (pos + 1 < end) {
2127                 if (pos + 1 + pos[0] > end)
2128                         break;
2129
2130                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
2131                                   pos + 1, pos[0]);
2132                 if (pos[0] == len &&
2133                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
2134                         return 1;
2135                 if (!exact_match && pos[0] > len && pos[pos[0] - len] == '.') {
2136                         const char *ap = (const char *) (pos + 1);
2137                         int offset = pos[0] - len;
2138                         if (os_strncasecmp(domain, ap + offset, len) == 0)
2139                                 return 1;
2140                 }
2141
2142                 pos += 1 + pos[0];
2143         }
2144
2145         return 0;
2146 }
2147
2148
2149 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
2150                               struct wpa_cred *cred,
2151                               struct wpabuf *domain_names)
2152 {
2153         size_t i;
2154         int ret = -1;
2155 #ifdef INTERWORKING_3GPP
2156         char nai[100], *realm;
2157
2158         char *imsi = NULL;
2159         int mnc_len = 0;
2160         if (cred->imsi)
2161                 imsi = cred->imsi;
2162 #ifdef PCSC_FUNCS
2163         else if (cred->pcsc && wpa_s->scard) {
2164                 if (interworking_pcsc_read_imsi(wpa_s) < 0)
2165                         return -1;
2166                 imsi = wpa_s->imsi;
2167                 mnc_len = wpa_s->mnc_len;
2168         }
2169 #endif /* PCSC_FUNCS */
2170 #ifdef CONFIG_EAP_PROXY
2171         else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
2172                 imsi = wpa_s->imsi;
2173                 mnc_len = wpa_s->mnc_len;
2174         }
2175 #endif /* CONFIG_EAP_PROXY */
2176         if (domain_names &&
2177             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
2178                 realm = os_strchr(nai, '@');
2179                 if (realm)
2180                         realm++;
2181                 wpa_msg(wpa_s, MSG_DEBUG,
2182                         "Interworking: Search for match with SIM/USIM domain %s",
2183                         realm);
2184                 if (realm &&
2185                     domain_name_list_contains(domain_names, realm, 1))
2186                         return 1;
2187                 if (realm)
2188                         ret = 0;
2189         }
2190 #endif /* INTERWORKING_3GPP */
2191
2192         if (domain_names == NULL || cred->domain == NULL)
2193                 return ret;
2194
2195         for (i = 0; i < cred->num_domain; i++) {
2196                 wpa_msg(wpa_s, MSG_DEBUG,
2197                         "Interworking: Search for match with home SP FQDN %s",
2198                         cred->domain[i]);
2199                 if (domain_name_list_contains(domain_names, cred->domain[i], 1))
2200                         return 1;
2201         }
2202
2203         return 0;
2204 }
2205
2206
2207 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
2208                                 struct wpabuf *domain_names)
2209 {
2210         struct wpa_cred *cred;
2211
2212         if (domain_names == NULL || wpa_s->conf->cred == NULL)
2213                 return -1;
2214
2215         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
2216                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
2217                 if (res)
2218                         return res;
2219         }
2220
2221         return 0;
2222 }
2223
2224
2225 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
2226 {
2227         struct wpa_bss *bss;
2228         struct wpa_ssid *ssid;
2229
2230         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2231                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
2232                         if (wpas_network_disabled(wpa_s, ssid) ||
2233                             ssid->mode != WPAS_MODE_INFRA)
2234                                 continue;
2235                         if (ssid->ssid_len != bss->ssid_len ||
2236                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
2237                             0)
2238                                 continue;
2239                         /*
2240                          * TODO: Consider more accurate matching of security
2241                          * configuration similarly to what is done in events.c
2242                          */
2243                         return 1;
2244                 }
2245         }
2246
2247         return 0;
2248 }
2249
2250
2251 static int roaming_partner_match(struct wpa_supplicant *wpa_s,
2252                                  struct roaming_partner *partner,
2253                                  struct wpabuf *domain_names)
2254 {
2255         wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
2256                    partner->fqdn, partner->exact_match, partner->priority,
2257                    partner->country);
2258         wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
2259                           wpabuf_head(domain_names),
2260                           wpabuf_len(domain_names));
2261         if (!domain_name_list_contains(domain_names, partner->fqdn,
2262                                        partner->exact_match))
2263                 return 0;
2264         /* TODO: match Country */
2265         return 1;
2266 }
2267
2268
2269 static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
2270                        struct wpa_bss *bss)
2271 {
2272         size_t i;
2273
2274         if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
2275                 wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
2276                 return 128; /* cannot check preference with domain name */
2277         }
2278
2279         if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
2280         {
2281                 wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
2282                 return 0; /* max preference for home SP network */
2283         }
2284
2285         for (i = 0; i < cred->num_roaming_partner; i++) {
2286                 if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
2287                                           bss->anqp->domain_name)) {
2288                         wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
2289                                    cred->roaming_partner[i].priority);
2290                         return cred->roaming_partner[i].priority;
2291                 }
2292         }
2293
2294         wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
2295         return 128;
2296 }
2297
2298
2299 static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
2300                                                   struct wpa_bss *selected,
2301                                                   struct wpa_cred *cred)
2302 {
2303         struct wpa_bss *bss;
2304         u8 best_prio, prio;
2305         struct wpa_cred *cred2;
2306
2307         /*
2308          * Check if any other BSS is operated by a more preferred roaming
2309          * partner.
2310          */
2311
2312         best_prio = roaming_prio(wpa_s, cred, selected);
2313         wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
2314                    MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
2315                    cred->id);
2316
2317         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2318                 if (bss == selected)
2319                         continue;
2320                 cred2 = interworking_credentials_available(wpa_s, bss, NULL);
2321                 if (!cred2)
2322                         continue;
2323                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
2324                         continue;
2325                 prio = roaming_prio(wpa_s, cred2, bss);
2326                 wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
2327                            MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
2328                            cred2->id);
2329                 if (prio < best_prio) {
2330                         int bh1, bh2, load1, load2, conn1, conn2;
2331                         bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
2332                         load1 = cred_over_max_bss_load(wpa_s, cred, selected);
2333                         conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
2334                         bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
2335                         load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
2336                         conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
2337                         wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d  new: %d %d %d",
2338                                    bh1, load1, conn1, bh2, load2, conn2);
2339                         if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
2340                                 wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
2341                                 best_prio = prio;
2342                                 selected = bss;
2343                         }
2344                 }
2345         }
2346
2347         return selected;
2348 }
2349
2350
2351 static void interworking_select_network(struct wpa_supplicant *wpa_s)
2352 {
2353         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
2354         struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
2355         unsigned int count = 0;
2356         const char *type;
2357         int res;
2358         struct wpa_cred *cred, *selected_cred = NULL;
2359         struct wpa_cred *selected_home_cred = NULL;
2360         struct wpa_cred *selected2_cred = NULL;
2361         struct wpa_cred *selected2_home_cred = NULL;
2362
2363         wpa_s->network_select = 0;
2364
2365         wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
2366                    wpa_s->auto_select);
2367         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2368                 int excluded = 0;
2369                 int bh, bss_load, conn_capab;
2370                 cred = interworking_credentials_available(wpa_s, bss,
2371                                                           &excluded);
2372                 if (!cred)
2373                         continue;
2374
2375                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
2376                         /*
2377                          * We currently support only HS 2.0 networks and those
2378                          * are required to use WPA2-Enterprise.
2379                          */
2380                         wpa_msg(wpa_s, MSG_DEBUG,
2381                                 "Interworking: Credential match with " MACSTR
2382                                 " but network does not use RSN",
2383                                 MAC2STR(bss->bssid));
2384                         continue;
2385                 }
2386                 if (!excluded)
2387                         count++;
2388                 res = interworking_home_sp(wpa_s, bss->anqp ?
2389                                            bss->anqp->domain_name : NULL);
2390                 if (res > 0)
2391                         type = "home";
2392                 else if (res == 0)
2393                         type = "roaming";
2394                 else
2395                         type = "unknown";
2396                 bh = cred_below_min_backhaul(wpa_s, cred, bss);
2397                 bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
2398                 conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
2399                 wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
2400                         excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
2401                         MAC2STR(bss->bssid), type,
2402                         bh ? " below_min_backhaul=1" : "",
2403                         bss_load ? " over_max_bss_load=1" : "",
2404                         conn_capab ? " conn_capab_missing=1" : "",
2405                         cred->id, cred->priority, cred->sp_priority);
2406                 if (excluded)
2407                         continue;
2408                 if (wpa_s->auto_select ||
2409                     (wpa_s->conf->auto_interworking &&
2410                      wpa_s->auto_network_select)) {
2411                         if (bh || bss_load || conn_capab) {
2412                                 if (selected2_cred == NULL ||
2413                                     cred_prio_cmp(cred, selected2_cred) > 0) {
2414                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
2415                                         selected2 = bss;
2416                                         selected2_cred = cred;
2417                                 }
2418                                 if (res > 0 &&
2419                                     (selected2_home_cred == NULL ||
2420                                      cred_prio_cmp(cred, selected2_home_cred) >
2421                                      0)) {
2422                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
2423                                         selected2_home = bss;
2424                                         selected2_home_cred = cred;
2425                                 }
2426                         } else {
2427                                 if (selected_cred == NULL ||
2428                                     cred_prio_cmp(cred, selected_cred) > 0) {
2429                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
2430                                         selected = bss;
2431                                         selected_cred = cred;
2432                                 }
2433                                 if (res > 0 &&
2434                                     (selected_home_cred == NULL ||
2435                                      cred_prio_cmp(cred, selected_home_cred) >
2436                                      0)) {
2437                                         wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
2438                                         selected_home = bss;
2439                                         selected_home_cred = cred;
2440                                 }
2441                         }
2442                 }
2443         }
2444
2445         if (selected_home && selected_home != selected &&
2446             selected_home_cred &&
2447             (selected_cred == NULL ||
2448              cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
2449                 /* Prefer network operated by the Home SP */
2450                 wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
2451                 selected = selected_home;
2452                 selected_cred = selected_home_cred;
2453         }
2454
2455         if (!selected) {
2456                 if (selected2_home) {
2457                         wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
2458                         selected = selected2_home;
2459                         selected_cred = selected2_home_cred;
2460                 } else if (selected2) {
2461                         wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
2462                         selected = selected2;
2463                         selected_cred = selected2_cred;
2464                 }
2465         }
2466
2467         if (count == 0) {
2468                 /*
2469                  * No matching network was found based on configured
2470                  * credentials. Check whether any of the enabled network blocks
2471                  * have matching APs.
2472                  */
2473                 if (interworking_find_network_match(wpa_s)) {
2474                         wpa_msg(wpa_s, MSG_DEBUG,
2475                                 "Interworking: Possible BSS match for enabled network configurations");
2476                         if (wpa_s->auto_select) {
2477                                 interworking_reconnect(wpa_s);
2478                                 return;
2479                         }
2480                 }
2481
2482                 if (wpa_s->auto_network_select) {
2483                         wpa_msg(wpa_s, MSG_DEBUG,
2484                                 "Interworking: Continue scanning after ANQP fetch");
2485                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
2486                                                 0);
2487                         return;
2488                 }
2489
2490                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
2491                         "with matching credentials found");
2492         }
2493
2494         if (selected) {
2495                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
2496                            MAC2STR(selected->bssid));
2497                 selected = pick_best_roaming_partner(wpa_s, selected,
2498                                                      selected_cred);
2499                 wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
2500                            " (after best roaming partner selection)",
2501                            MAC2STR(selected->bssid));
2502                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
2503                         MAC2STR(selected->bssid));
2504                 interworking_connect(wpa_s, selected, 0);
2505         }
2506 }
2507
2508
2509 static struct wpa_bss_anqp *
2510 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
2511 {
2512         struct wpa_bss *other;
2513
2514         if (is_zero_ether_addr(bss->hessid))
2515                 return NULL; /* Cannot be in the same homegenous ESS */
2516
2517         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
2518                 if (other == bss)
2519                         continue;
2520                 if (other->anqp == NULL)
2521                         continue;
2522                 if (other->anqp->roaming_consortium == NULL &&
2523                     other->anqp->nai_realm == NULL &&
2524                     other->anqp->anqp_3gpp == NULL &&
2525                     other->anqp->domain_name == NULL)
2526                         continue;
2527                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
2528                         continue;
2529                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
2530                         continue;
2531                 if (bss->ssid_len != other->ssid_len ||
2532                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
2533                         continue;
2534
2535                 wpa_msg(wpa_s, MSG_DEBUG,
2536                         "Interworking: Share ANQP data with already fetched BSSID "
2537                         MACSTR " and " MACSTR,
2538                         MAC2STR(other->bssid), MAC2STR(bss->bssid));
2539                 other->anqp->users++;
2540                 return other->anqp;
2541         }
2542
2543         return NULL;
2544 }
2545
2546
2547 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
2548 {
2549         struct wpa_bss *bss;
2550         int found = 0;
2551         const u8 *ie;
2552
2553         wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
2554                    "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
2555                    wpa_s->fetch_anqp_in_progress,
2556                    wpa_s->fetch_osu_icon_in_progress);
2557
2558         if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
2559                 wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
2560                 return;
2561         }
2562
2563         if (wpa_s->fetch_osu_icon_in_progress) {
2564                 wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
2565                 hs20_next_osu_icon(wpa_s);
2566                 return;
2567         }
2568
2569         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2570                 if (!(bss->caps & IEEE80211_CAP_ESS))
2571                         continue;
2572                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
2573                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
2574                         continue; /* AP does not support Interworking */
2575                 if (disallowed_bssid(wpa_s, bss->bssid) ||
2576                     disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
2577                         continue; /* Disallowed BSS */
2578
2579                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
2580                         if (bss->anqp == NULL) {
2581                                 bss->anqp = interworking_match_anqp_info(wpa_s,
2582                                                                          bss);
2583                                 if (bss->anqp) {
2584                                         /* Shared data already fetched */
2585                                         continue;
2586                                 }
2587                                 bss->anqp = wpa_bss_anqp_alloc();
2588                                 if (bss->anqp == NULL)
2589                                         break;
2590                         }
2591                         found++;
2592                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
2593                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
2594                                 MACSTR, MAC2STR(bss->bssid));
2595                         interworking_anqp_send_req(wpa_s, bss);
2596                         break;
2597                 }
2598         }
2599
2600         if (found == 0) {
2601                 if (wpa_s->fetch_osu_info) {
2602                         if (wpa_s->num_prov_found == 0 &&
2603                             wpa_s->fetch_osu_waiting_scan &&
2604                             wpa_s->num_osu_scans < 3) {
2605                                 wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
2606                                 hs20_start_osu_scan(wpa_s);
2607                                 return;
2608                         }
2609                         wpa_printf(MSG_DEBUG, "Interworking: Next icon");
2610                         hs20_osu_icon_fetch(wpa_s);
2611                         return;
2612                 }
2613                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
2614                 wpa_s->fetch_anqp_in_progress = 0;
2615                 if (wpa_s->network_select)
2616                         interworking_select_network(wpa_s);
2617         }
2618 }
2619
2620
2621 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
2622 {
2623         struct wpa_bss *bss;
2624
2625         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
2626                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
2627
2628         wpa_s->fetch_anqp_in_progress = 1;
2629
2630         /*
2631          * Start actual ANQP operation from eloop call to make sure the loop
2632          * does not end up using excessive recursion.
2633          */
2634         eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
2635 }
2636
2637
2638 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
2639 {
2640         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
2641                 return 0;
2642
2643         wpa_s->network_select = 0;
2644         wpa_s->fetch_all_anqp = 1;
2645         wpa_s->fetch_osu_info = 0;
2646
2647         interworking_start_fetch_anqp(wpa_s);
2648
2649         return 0;
2650 }
2651
2652
2653 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
2654 {
2655         if (!wpa_s->fetch_anqp_in_progress)
2656                 return;
2657
2658         wpa_s->fetch_anqp_in_progress = 0;
2659 }
2660
2661
2662 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
2663                   u16 info_ids[], size_t num_ids, u32 subtypes)
2664 {
2665         struct wpabuf *buf;
2666         struct wpabuf *hs20_buf = NULL;
2667         int ret = 0;
2668         int freq;
2669         struct wpa_bss *bss;
2670         int res;
2671
2672         freq = wpa_s->assoc_freq;
2673         bss = wpa_bss_get_bssid(wpa_s, dst);
2674         if (bss) {
2675                 wpa_bss_anqp_unshare_alloc(bss);
2676                 freq = bss->freq;
2677         }
2678         if (freq <= 0)
2679                 return -1;
2680
2681         wpa_msg(wpa_s, MSG_DEBUG,
2682                 "ANQP: Query Request to " MACSTR " for %u id(s)",
2683                 MAC2STR(dst), (unsigned int) num_ids);
2684
2685 #ifdef CONFIG_HS20
2686         if (subtypes != 0) {
2687                 hs20_buf = wpabuf_alloc(100);
2688                 if (hs20_buf == NULL)
2689                         return -1;
2690                 hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf);
2691         }
2692 #endif /* CONFIG_HS20 */
2693
2694         buf = anqp_build_req(info_ids, num_ids, hs20_buf);
2695         wpabuf_free(hs20_buf);
2696         if (buf == NULL)
2697                 return -1;
2698
2699         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
2700         if (res < 0) {
2701                 wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request");
2702                 wpabuf_free(buf);
2703                 ret = -1;
2704         } else {
2705                 wpa_msg(wpa_s, MSG_DEBUG,
2706                         "ANQP: Query started with dialog token %u", res);
2707         }
2708
2709         return ret;
2710 }
2711
2712
2713 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
2714                                             struct wpa_bss *bss, const u8 *sa,
2715                                             u16 info_id,
2716                                             const u8 *data, size_t slen)
2717 {
2718         const u8 *pos = data;
2719         struct wpa_bss_anqp *anqp = NULL;
2720 #ifdef CONFIG_HS20
2721         u8 type;
2722 #endif /* CONFIG_HS20 */
2723
2724         if (bss)
2725                 anqp = bss->anqp;
2726
2727         switch (info_id) {
2728         case ANQP_CAPABILITY_LIST:
2729                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2730                         " ANQP Capability list", MAC2STR(sa));
2731                 break;
2732         case ANQP_VENUE_NAME:
2733                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2734                         " Venue Name", MAC2STR(sa));
2735                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
2736                 if (anqp) {
2737                         wpabuf_free(anqp->venue_name);
2738                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
2739                 }
2740                 break;
2741         case ANQP_NETWORK_AUTH_TYPE:
2742                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2743                         " Network Authentication Type information",
2744                         MAC2STR(sa));
2745                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
2746                                   "Type", pos, slen);
2747                 if (anqp) {
2748                         wpabuf_free(anqp->network_auth_type);
2749                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
2750                 }
2751                 break;
2752         case ANQP_ROAMING_CONSORTIUM:
2753                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2754                         " Roaming Consortium list", MAC2STR(sa));
2755                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
2756                                   pos, slen);
2757                 if (anqp) {
2758                         wpabuf_free(anqp->roaming_consortium);
2759                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
2760                 }
2761                 break;
2762         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
2763                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2764                         " IP Address Type Availability information",
2765                         MAC2STR(sa));
2766                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
2767                             pos, slen);
2768                 if (anqp) {
2769                         wpabuf_free(anqp->ip_addr_type_availability);
2770                         anqp->ip_addr_type_availability =
2771                                 wpabuf_alloc_copy(pos, slen);
2772                 }
2773                 break;
2774         case ANQP_NAI_REALM:
2775                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2776                         " NAI Realm list", MAC2STR(sa));
2777                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
2778                 if (anqp) {
2779                         wpabuf_free(anqp->nai_realm);
2780                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
2781                 }
2782                 break;
2783         case ANQP_3GPP_CELLULAR_NETWORK:
2784                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2785                         " 3GPP Cellular Network information", MAC2STR(sa));
2786                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
2787                                   pos, slen);
2788                 if (anqp) {
2789                         wpabuf_free(anqp->anqp_3gpp);
2790                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
2791                 }
2792                 break;
2793         case ANQP_DOMAIN_NAME:
2794                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
2795                         " Domain Name list", MAC2STR(sa));
2796                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
2797                 if (anqp) {
2798                         wpabuf_free(anqp->domain_name);
2799                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
2800                 }
2801                 break;
2802         case ANQP_VENDOR_SPECIFIC:
2803                 if (slen < 3)
2804                         return;
2805
2806                 switch (WPA_GET_BE24(pos)) {
2807 #ifdef CONFIG_HS20
2808                 case OUI_WFA:
2809                         pos += 3;
2810                         slen -= 3;
2811
2812                         if (slen < 1)
2813                                 return;
2814                         type = *pos++;
2815                         slen--;
2816
2817                         switch (type) {
2818                         case HS20_ANQP_OUI_TYPE:
2819                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
2820                                                              pos, slen);
2821                                 break;
2822                         default:
2823                                 wpa_msg(wpa_s, MSG_DEBUG,
2824                                         "HS20: Unsupported ANQP vendor type %u",
2825                                         type);
2826                                 break;
2827                         }
2828                         break;
2829 #endif /* CONFIG_HS20 */
2830                 default:
2831                         wpa_msg(wpa_s, MSG_DEBUG,
2832                                 "Interworking: Unsupported vendor-specific ANQP OUI %06x",
2833                                 WPA_GET_BE24(pos));
2834                         return;
2835                 }
2836                 break;
2837         default:
2838                 wpa_msg(wpa_s, MSG_DEBUG,
2839                         "Interworking: Unsupported ANQP Info ID %u", info_id);
2840                 break;
2841         }
2842 }
2843
2844
2845 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
2846                   enum gas_query_result result,
2847                   const struct wpabuf *adv_proto,
2848                   const struct wpabuf *resp, u16 status_code)
2849 {
2850         struct wpa_supplicant *wpa_s = ctx;
2851         const u8 *pos;
2852         const u8 *end;
2853         u16 info_id;
2854         u16 slen;
2855         struct wpa_bss *bss = NULL, *tmp;
2856         const char *anqp_result = "SUCCESS";
2857
2858         wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
2859                    " dialog_token=%u result=%d status_code=%u",
2860                    MAC2STR(dst), dialog_token, result, status_code);
2861         if (result != GAS_QUERY_SUCCESS) {
2862                 if (wpa_s->fetch_osu_icon_in_progress)
2863                         hs20_icon_fetch_failed(wpa_s);
2864                 anqp_result = "FAILURE";
2865                 goto out;
2866         }
2867
2868         pos = wpabuf_head(adv_proto);
2869         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
2870             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
2871                 wpa_msg(wpa_s, MSG_DEBUG,
2872                         "ANQP: Unexpected Advertisement Protocol in response");
2873                 if (wpa_s->fetch_osu_icon_in_progress)
2874                         hs20_icon_fetch_failed(wpa_s);
2875                 anqp_result = "INVALID_FRAME";
2876                 goto out;
2877         }
2878
2879         /*
2880          * If possible, select the BSS entry based on which BSS entry was used
2881          * for the request. This can help in cases where multiple BSS entries
2882          * may exist for the same AP.
2883          */
2884         dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
2885                 if (tmp == wpa_s->interworking_gas_bss &&
2886                     os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
2887                         bss = tmp;
2888                         break;
2889                 }
2890         }
2891         if (bss == NULL)
2892                 bss = wpa_bss_get_bssid(wpa_s, dst);
2893
2894         pos = wpabuf_head(resp);
2895         end = pos + wpabuf_len(resp);
2896
2897         while (pos < end) {
2898                 unsigned int left = end - pos;
2899
2900                 if (left < 4) {
2901                         wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element");
2902                         anqp_result = "INVALID_FRAME";
2903                         goto out_parse_done;
2904                 }
2905                 info_id = WPA_GET_LE16(pos);
2906                 pos += 2;
2907                 slen = WPA_GET_LE16(pos);
2908                 pos += 2;
2909                 left -= 4;
2910                 if (left < slen) {
2911                         wpa_msg(wpa_s, MSG_DEBUG,
2912                                 "ANQP: Invalid element length for Info ID %u",
2913                                 info_id);
2914                         anqp_result = "INVALID_FRAME";
2915                         goto out_parse_done;
2916                 }
2917                 interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
2918                                                 slen);
2919                 pos += slen;
2920         }
2921
2922 out_parse_done:
2923         hs20_notify_parse_done(wpa_s);
2924 out:
2925         wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
2926                 MAC2STR(dst), anqp_result);
2927 }
2928
2929
2930 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
2931                                           struct wpa_scan_results *scan_res)
2932 {
2933         wpa_msg(wpa_s, MSG_DEBUG,
2934                 "Interworking: Scan results available - start ANQP fetch");
2935         interworking_start_fetch_anqp(wpa_s);
2936 }
2937
2938
2939 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
2940                         int *freqs)
2941 {
2942         interworking_stop_fetch_anqp(wpa_s);
2943         wpa_s->network_select = 1;
2944         wpa_s->auto_network_select = 0;
2945         wpa_s->auto_select = !!auto_select;
2946         wpa_s->fetch_all_anqp = 0;
2947         wpa_s->fetch_osu_info = 0;
2948         wpa_msg(wpa_s, MSG_DEBUG,
2949                 "Interworking: Start scan for network selection");
2950         wpa_s->scan_res_handler = interworking_scan_res_handler;
2951         wpa_s->normal_scans = 0;
2952         wpa_s->scan_req = MANUAL_SCAN_REQ;
2953         os_free(wpa_s->manual_scan_freqs);
2954         wpa_s->manual_scan_freqs = freqs;
2955         wpa_s->after_wps = 0;
2956         wpa_s->known_wps_freq = 0;
2957         wpa_supplicant_req_scan(wpa_s, 0, 0);
2958
2959         return 0;
2960 }
2961
2962
2963 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2964                         enum gas_query_result result,
2965                         const struct wpabuf *adv_proto,
2966                         const struct wpabuf *resp, u16 status_code)
2967 {
2968         struct wpa_supplicant *wpa_s = ctx;
2969         struct wpabuf *n;
2970
2971         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2972                 " dialog_token=%d status_code=%d resp_len=%d",
2973                 MAC2STR(addr), dialog_token, status_code,
2974                 resp ? (int) wpabuf_len(resp) : -1);
2975         if (!resp)
2976                 return;
2977
2978         n = wpabuf_dup(resp);
2979         if (n == NULL)
2980                 return;
2981         wpabuf_free(wpa_s->prev_gas_resp);
2982         wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
2983         os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
2984         wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
2985         wpa_s->last_gas_resp = n;
2986         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2987         wpa_s->last_gas_dialog_token = dialog_token;
2988 }
2989
2990
2991 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2992                      const struct wpabuf *adv_proto,
2993                      const struct wpabuf *query)
2994 {
2995         struct wpabuf *buf;
2996         int ret = 0;
2997         int freq;
2998         struct wpa_bss *bss;
2999         int res;
3000         size_t len;
3001         u8 query_resp_len_limit = 0;
3002
3003         freq = wpa_s->assoc_freq;
3004         bss = wpa_bss_get_bssid(wpa_s, dst);
3005         if (bss)
3006                 freq = bss->freq;
3007         if (freq <= 0)
3008                 return -1;
3009
3010         wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
3011                 MAC2STR(dst), freq);
3012         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
3013         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
3014
3015         len = 3 + wpabuf_len(adv_proto) + 2;
3016         if (query)
3017                 len += wpabuf_len(query);
3018         buf = gas_build_initial_req(0, len);
3019         if (buf == NULL)
3020                 return -1;
3021
3022         /* Advertisement Protocol IE */
3023         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
3024         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
3025         wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
3026         wpabuf_put_buf(buf, adv_proto);
3027
3028         /* GAS Query */
3029         if (query) {
3030                 wpabuf_put_le16(buf, wpabuf_len(query));
3031                 wpabuf_put_buf(buf, query);
3032         } else
3033                 wpabuf_put_le16(buf, 0);
3034
3035         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
3036         if (res < 0) {
3037                 wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
3038                 wpabuf_free(buf);
3039                 ret = -1;
3040         } else
3041                 wpa_msg(wpa_s, MSG_DEBUG,
3042                         "GAS: Query started with dialog token %u", res);
3043
3044         return ret;
3045 }