wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "common/ieee802_11_defs.h"
  13 #include "common/gas.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "utils/pcsc_funcs.h"
  16 #include "utils/eloop.h"
  17 #include "drivers/driver.h"
  18 #include "eap_common/eap_defs.h"
  19 #include "eap_peer/eap.h"
  20 #include "eap_peer/eap_methods.h"
  21 #include "wpa_supplicant_i.h"
  22 #include "config.h"
  23 #include "config_ssid.h"
  24 #include "bss.h"
  25 #include "scan.h"
  26 #include "notify.h"
  27 #include "gas_query.h"
  28 #include "hs20_supplicant.h"
  29 #include "interworking.h"
  30
  31
  32 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  33 #define INTERWORKING_3GPP
  34 #else
  35 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  36 #define INTERWORKING_3GPP
  37 #else
  38 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  39 #define INTERWORKING_3GPP
  40 #endif
  41 #endif
  42 #endif
  43
  44 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  45
  46
  47 static void interworking_reconnect(struct wpa_supplicant *wpa_s)
  48 {
  49         if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
  50                 wpa_supplicant_cancel_sched_scan(wpa_s);
  51                 wpa_supplicant_deauthenticate(wpa_s,
  52                                               WLAN_REASON_DEAUTH_LEAVING);
  53         }
  54         wpa_s->disconnected = 0;
  55         wpa_s->reassociate = 1;
  56
  57         if (wpa_s->last_scan_res_used > 0) {
  58                 struct os_time now;
  59                 os_get_time(&now);
  60                 if (now.sec - wpa_s->last_scan.sec <= 5) {
  61                         wpa_printf(MSG_DEBUG, "Interworking: Old scan results "
  62                                    "are fresh - connect without new scan");
  63                         if (wpas_select_network_from_last_scan(wpa_s) >= 0)
  64                                 return;
  65                 }
  66         }
  67
  68         wpa_supplicant_req_scan(wpa_s, 0, 0);
  69 }
  70
  71
  72 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  73                                       struct wpabuf *extra)
  74 {
  75         struct wpabuf *buf;
  76         size_t i;
  77         u8 *len_pos;
  78
  79         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  80                                          (extra ? wpabuf_len(extra) : 0));
  81         if (buf == NULL)
  82                 return NULL;
  83
  84         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  85         for (i = 0; i < num_ids; i++)
  86                 wpabuf_put_le16(buf, info_ids[i]);
  87         gas_anqp_set_element_len(buf, len_pos);
  88         if (extra)
  89                 wpabuf_put_buf(buf, extra);
  90
  91         gas_anqp_set_len(buf);
  92
  93         return buf;
  94 }
  95
  96
  97 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  98                                       u8 dialog_token,
  99                                       enum gas_query_result result,
 100                                       const struct wpabuf *adv_proto,
 101                                       const struct wpabuf *resp,
 102                                       u16 status_code)
 103 {
 104         struct wpa_supplicant *wpa_s = ctx;
 105
 106         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
 107                      status_code);
 108         interworking_next_anqp_fetch(wpa_s);
 109 }
 110
 111
 112 static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
 113 {
 114         struct wpa_cred *cred;
 115
 116         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 117                 if (cred->roaming_consortium_len)
 118                         return 1;
 119         }
 120         return 0;
 121 }
 122
 123
 124 static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
 125 {
 126         struct wpa_cred *cred;
 127
 128         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 129                 if (cred->pcsc || cred->imsi)
 130                         return 1;
 131         }
 132         return 0;
 133 }
 134
 135
 136 static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
 137 {
 138         struct wpa_cred *cred;
 139
 140         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 141                 if (cred->pcsc || cred->imsi)
 142                         continue;
 143                 if (!cred->eap_method)
 144                         return 1;
 145                 if (cred->realm && cred->roaming_consortium_len == 0)
 146                         return 1;
 147         }
 148         return 0;
 149 }
 150
 151
 152 static int cred_with_domain(struct wpa_supplicant *wpa_s)
 153 {
 154         struct wpa_cred *cred;
 155
 156         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 157                 if (cred->domain || cred->pcsc || cred->imsi)
 158                         return 1;
 159         }
 160         return 0;
 161 }
 162
 163
 164 static int additional_roaming_consortiums(struct wpa_bss *bss)
 165 {
 166         const u8 *ie;
 167         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 168         if (ie == NULL || ie[1] == 0)
 169                 return 0;
 170         return ie[2]; /* Number of ANQP OIs */
 171 }
 172
 173
 174 static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
 175 {
 176         struct wpa_supplicant *wpa_s = eloop_ctx;
 177         interworking_next_anqp_fetch(wpa_s);
 178 }
 179
 180
 181 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
 182                                       struct wpa_bss *bss)
 183 {
 184         struct wpabuf *buf;
 185         int ret = 0;
 186         int res;
 187         u16 info_ids[8];
 188         size_t num_info_ids = 0;
 189         struct wpabuf *extra = NULL;
 190         int all = wpa_s->fetch_all_anqp;
 191
 192         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 193                    MAC2STR(bss->bssid));
 194
 195         info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
 196         if (all) {
 197                 info_ids[num_info_ids++] = ANQP_VENUE_NAME;
 198                 info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
 199         }
 200         if (all || (cred_with_roaming_consortium(wpa_s) &&
 201                     additional_roaming_consortiums(bss)))
 202                 info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
 203         if (all)
 204                 info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
 205         if (all || cred_with_nai_realm(wpa_s))
 206                 info_ids[num_info_ids++] = ANQP_NAI_REALM;
 207         if (all || cred_with_3gpp(wpa_s))
 208                 info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
 209         if (all || cred_with_domain(wpa_s))
 210                 info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
 211         wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
 212                     (u8 *) info_ids, num_info_ids * 2);
 213
 214 #ifdef CONFIG_HS20
 215         if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
 216                 u8 *len_pos;
 217
 218                 extra = wpabuf_alloc(100);
 219                 if (!extra)
 220                         return -1;
 221
 222                 len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
 223                 wpabuf_put_be24(extra, OUI_WFA);
 224                 wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
 225                 wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
 226                 wpabuf_put_u8(extra, 0); /* Reserved */
 227                 wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
 228                 if (all) {
 229                         wpabuf_put_u8(extra,
 230                                       HS20_STYPE_OPERATOR_FRIENDLY_NAME);
 231                         wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
 232                         wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
 233                         wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
 234                 }
 235                 gas_anqp_set_element_len(extra, len_pos);
 236         }
 237 #endif /* CONFIG_HS20 */
 238
 239         buf = anqp_build_req(info_ids, num_info_ids, extra);
 240         wpabuf_free(extra);
 241         if (buf == NULL)
 242                 return -1;
 243
 244         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 245                             interworking_anqp_resp_cb, wpa_s);
 246         if (res < 0) {
 247                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 248                 ret = -1;
 249                 eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
 250                                        NULL);
 251         } else
 252                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 253                            "%u", res);
 254
 255         wpabuf_free(buf);
 256         return ret;
 257 }
 258
 259
 260 struct nai_realm_eap {
 261         u8 method;
 262         u8 inner_method;
 263         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 264         u8 cred_type;
 265         u8 tunneled_cred_type;
 266 };
 267
 268 struct nai_realm {
 269         u8 encoding;
 270         char *realm;
 271         u8 eap_count;
 272         struct nai_realm_eap *eap;
 273 };
 274
 275
 276 static void nai_realm_free(struct nai_realm *realms, u16 count)
 277 {
 278         u16 i;
 279
 280         if (realms == NULL)
 281                 return;
 282         for (i = 0; i < count; i++) {
 283                 os_free(realms[i].eap);
 284                 os_free(realms[i].realm);
 285         }
 286         os_free(realms);
 287 }
 288
 289
 290 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 291                                       const u8 *end)
 292 {
 293         u8 elen, auth_count, a;
 294         const u8 *e_end;
 295
 296         if (pos + 3 > end) {
 297                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 298                 return NULL;
 299         }
 300
 301         elen = *pos++;
 302         if (pos + elen > end || elen < 2) {
 303                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 304                 return NULL;
 305         }
 306         e_end = pos + elen;
 307         e->method = *pos++;
 308         auth_count = *pos++;
 309         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 310                    elen, e->method, auth_count);
 311
 312         for (a = 0; a < auth_count; a++) {
 313                 u8 id, len;
 314
 315                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 316                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 317                                    "Parameter subfield");
 318                         return NULL;
 319                 }
 320
 321                 id = *pos++;
 322                 len = *pos++;
 323
 324                 switch (id) {
 325                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 326                         if (len < 1)
 327                                 break;
 328                         e->inner_non_eap = *pos;
 329                         if (e->method != EAP_TYPE_TTLS)
 330                                 break;
 331                         switch (*pos) {
 332                         case NAI_REALM_INNER_NON_EAP_PAP:
 333                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 334                                 break;
 335                         case NAI_REALM_INNER_NON_EAP_CHAP:
 336                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 337                                 break;
 338                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 339                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 340                                 break;
 341                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 342                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 343                                 break;
 344                         }
 345                         break;
 346                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 347                         if (len < 1)
 348                                 break;
 349                         e->inner_method = *pos;
 350                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 351                                    e->inner_method);
 352                         break;
 353                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 354                         if (len < 1)
 355                                 break;
 356                         e->cred_type = *pos;
 357                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 358                                    e->cred_type);
 359                         break;
 360                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 361                         if (len < 1)
 362                                 break;
 363                         e->tunneled_cred_type = *pos;
 364                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 365                                    "Type: %u", e->tunneled_cred_type);
 366                         break;
 367                 default:
 368                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 369                                    "Parameter: id=%u len=%u", id, len);
 370                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 371                                     "Value", pos, len);
 372                         break;
 373                 }
 374
 375                 pos += len;
 376         }
 377
 378         return e_end;
 379 }
 380
 381
 382 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 383                                         const u8 *end)
 384 {
 385         u16 len;
 386         const u8 *f_end;
 387         u8 realm_len, e;
 388
 389         if (end - pos < 4) {
 390                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 391                            "fixed fields");
 392                 return NULL;
 393         }
 394
 395         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 396         pos += 2;
 397         if (pos + len > end || len < 3) {
 398                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 399                            "(len=%u; left=%u)",
 400                            len, (unsigned int) (end - pos));
 401                 return NULL;
 402         }
 403         f_end = pos + len;
 404
 405         r->encoding = *pos++;
 406         realm_len = *pos++;
 407         if (pos + realm_len > f_end) {
 408                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 409                            "(len=%u; left=%u)",
 410                            realm_len, (unsigned int) (f_end - pos));
 411                 return NULL;
 412         }
 413         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 414         r->realm = os_malloc(realm_len + 1);
 415         if (r->realm == NULL)
 416                 return NULL;
 417         os_memcpy(r->realm, pos, realm_len);
 418         r->realm[realm_len] = '\0';
 419         pos += realm_len;
 420
 421         if (pos + 1 > f_end) {
 422                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 423                 return NULL;
 424         }
 425         r->eap_count = *pos++;
 426         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 427         if (pos + r->eap_count * 3 > f_end) {
 428                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 429                 return NULL;
 430         }
 431         r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
 432         if (r->eap == NULL)
 433                 return NULL;
 434
 435         for (e = 0; e < r->eap_count; e++) {
 436                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 437                 if (pos == NULL)
 438                         return NULL;
 439         }
 440
 441         return f_end;
 442 }
 443
 444
 445 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 446 {
 447         struct nai_realm *realm;
 448         const u8 *pos, *end;
 449         u16 i, num;
 450
 451         if (anqp == NULL || wpabuf_len(anqp) < 2)
 452                 return NULL;
 453
 454         pos = wpabuf_head_u8(anqp);
 455         end = pos + wpabuf_len(anqp);
 456         num = WPA_GET_LE16(pos);
 457         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 458         pos += 2;
 459
 460         if (num * 5 > end - pos) {
 461                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 462                            "enough data (%u octets) for that many realms",
 463                            num, (unsigned int) (end - pos));
 464                 return NULL;
 465         }
 466
 467         realm = os_calloc(num, sizeof(struct nai_realm));
 468         if (realm == NULL)
 469                 return NULL;
 470
 471         for (i = 0; i < num; i++) {
 472                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 473                 if (pos == NULL) {
 474                         nai_realm_free(realm, num);
 475                         return NULL;
 476                 }
 477         }
 478
 479         *count = num;
 480         return realm;
 481 }
 482
 483
 484 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 485 {
 486         char *tmp, *pos, *end;
 487         int match = 0;
 488
 489         if (realm->realm == NULL || home_realm == NULL)
 490                 return 0;
 491
 492         if (os_strchr(realm->realm, ';') == NULL)
 493                 return os_strcasecmp(realm->realm, home_realm) == 0;
 494
 495         tmp = os_strdup(realm->realm);
 496         if (tmp == NULL)
 497                 return 0;
 498
 499         pos = tmp;
 500         while (*pos) {
 501                 end = os_strchr(pos, ';');
 502                 if (end)
 503                         *end = '\0';
 504                 if (os_strcasecmp(pos, home_realm) == 0) {
 505                         match = 1;
 506                         break;
 507                 }
 508                 if (end == NULL)
 509                         break;
 510                 pos = end + 1;
 511         }
 512
 513         os_free(tmp);
 514
 515         return match;
 516 }
 517
 518
 519 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 520 {
 521         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 522                 return 0; /* method not supported */
 523
 524         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 525                 /* Only tunneled methods with username/password supported */
 526                 return 0;
 527         }
 528
 529         if (eap->method == EAP_TYPE_PEAP) {
 530                 if (eap->inner_method &&
 531                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 532                         return 0;
 533                 if (!eap->inner_method &&
 534                     eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
 535                         return 0;
 536         }
 537
 538         if (eap->method == EAP_TYPE_TTLS) {
 539                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 540                         return 1; /* Assume TTLS/MSCHAPv2 is used */
 541                 if (eap->inner_method &&
 542                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 543                         return 0;
 544                 if (eap->inner_non_eap &&
 545                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 546                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 547                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 548                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 549                         return 0;
 550         }
 551
 552         if (eap->inner_method &&
 553             eap->inner_method != EAP_TYPE_GTC &&
 554             eap->inner_method != EAP_TYPE_MSCHAPV2)
 555                 return 0;
 556
 557         return 1;
 558 }
 559
 560
 561 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 562 {
 563         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 564                 return 0; /* method not supported */
 565
 566         if (eap->method != EAP_TYPE_TLS) {
 567                 /* Only EAP-TLS supported for credential authentication */
 568                 return 0;
 569         }
 570
 571         return 1;
 572 }
 573
 574
 575 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 576                                                  struct nai_realm *realm)
 577 {
 578         u8 e;
 579
 580         if (cred == NULL ||
 581             cred->username == NULL ||
 582             cred->username[0] == '\0' ||
 583             ((cred->password == NULL ||
 584               cred->password[0] == '\0') &&
 585              (cred->private_key == NULL ||
 586               cred->private_key[0] == '\0')))
 587                 return NULL;
 588
 589         for (e = 0; e < realm->eap_count; e++) {
 590                 struct nai_realm_eap *eap = &realm->eap[e];
 591                 if (cred->password && cred->password[0] &&
 592                     nai_realm_cred_username(eap))
 593                         return eap;
 594                 if (cred->private_key && cred->private_key[0] &&
 595                     nai_realm_cred_cert(eap))
 596                         return eap;
 597         }
 598
 599         return NULL;
 600 }
 601
 602
 603 #ifdef INTERWORKING_3GPP
 604
 605 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 606 {
 607         u8 plmn[3];
 608         const u8 *pos, *end;
 609         u8 udhl;
 610
 611         /* See Annex A of 3GPP TS 24.234 v8.1.0 for description */
 612         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 613         plmn[1] = imsi[2] - '0';
 614         /* default to MNC length 3 if unknown */
 615         if (mnc_len != 2)
 616                 plmn[1] |= (imsi[5] - '0') << 4;
 617         else
 618                 plmn[1] |= 0xf0;
 619         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 620
 621         if (anqp == NULL)
 622                 return 0;
 623         pos = wpabuf_head_u8(anqp);
 624         end = pos + wpabuf_len(anqp);
 625         if (pos + 2 > end)
 626                 return 0;
 627         if (*pos != 0) {
 628                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 629                 return 0;
 630         }
 631         pos++;
 632         udhl = *pos++;
 633         if (pos + udhl > end) {
 634                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 635                 return 0;
 636         }
 637         end = pos + udhl;
 638
 639         while (pos + 2 <= end) {
 640                 u8 iei, len;
 641                 const u8 *l_end;
 642                 iei = *pos++;
 643                 len = *pos++ & 0x7f;
 644                 if (pos + len > end)
 645                         break;
 646                 l_end = pos + len;
 647
 648                 if (iei == 0 && len > 0) {
 649                         /* PLMN List */
 650                         u8 num, i;
 651                         num = *pos++;
 652                         for (i = 0; i < num; i++) {
 653                                 if (pos + 3 > end)
 654                                         break;
 655                                 if (os_memcmp(pos, plmn, 3) == 0)
 656                                         return 1; /* Found matching PLMN */
 657                                 pos += 3;
 658                         }
 659                 }
 660
 661                 pos = l_end;
 662         }
 663
 664         return 0;
 665 }
 666
 667
 668 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 669                           size_t mnc_len, char prefix)
 670 {
 671         const char *sep, *msin;
 672         char *end, *pos;
 673         size_t msin_len, plmn_len;
 674
 675         /*
 676          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 677          * Root NAI:
 678          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 679          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 680          */
 681
 682         if (imsi == NULL || os_strlen(imsi) > 16) {
 683                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 684                 return -1;
 685         }
 686         sep = os_strchr(imsi, '-');
 687         if (sep) {
 688                 plmn_len = sep - imsi;
 689                 msin = sep + 1;
 690         } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
 691                 plmn_len = 3 + mnc_len;
 692                 msin = imsi + plmn_len;
 693         } else
 694                 return -1;
 695         if (plmn_len != 5 && plmn_len != 6)
 696                 return -1;
 697         msin_len = os_strlen(msin);
 698
 699         pos = nai;
 700         end = nai + nai_len;
 701         if (prefix)
 702                 *pos++ = prefix;
 703         os_memcpy(pos, imsi, plmn_len);
 704         pos += plmn_len;
 705         os_memcpy(pos, msin, msin_len);
 706         pos += msin_len;
 707         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 708         if (plmn_len == 5) {
 709                 *pos++ = '0';
 710                 *pos++ = imsi[3];
 711                 *pos++ = imsi[4];
 712         } else {
 713                 *pos++ = imsi[3];
 714                 *pos++ = imsi[4];
 715                 *pos++ = imsi[5];
 716         }
 717         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 718                            imsi[0], imsi[1], imsi[2]);
 719
 720         return 0;
 721 }
 722
 723
 724 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 725 {
 726         char nai[100];
 727         if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
 728                 return -1;
 729         return wpa_config_set_quoted(ssid, "identity", nai);
 730 }
 731
 732 #endif /* INTERWORKING_3GPP */
 733
 734
 735 static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
 736                                         struct wpa_ssid *ssid)
 737 {
 738         if (wpa_config_set(ssid, "key_mgmt",
 739                            wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
 740                            "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP", 0) < 0)
 741                 return -1;
 742         if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
 743                 return -1;
 744         if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
 745                 return -1;
 746         return 0;
 747 }
 748
 749
 750 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 751                                      struct wpa_bss *bss)
 752 {
 753 #ifdef INTERWORKING_3GPP
 754         struct wpa_cred *cred;
 755         struct wpa_ssid *ssid;
 756         const u8 *ie;
 757         int eap_type;
 758         int res;
 759         char prefix;
 760
 761         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
 762                 return -1;
 763
 764         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 765                 char *sep;
 766                 const char *imsi;
 767                 int mnc_len;
 768
 769 #ifdef PCSC_FUNCS
 770                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
 771                     wpa_s->imsi[0]) {
 772                         imsi = wpa_s->imsi;
 773                         mnc_len = wpa_s->mnc_len;
 774                         goto compare;
 775                 }
 776 #endif /* PCSC_FUNCS */
 777
 778                 if (cred->imsi == NULL || !cred->imsi[0] ||
 779                     cred->milenage == NULL || !cred->milenage[0])
 780                         continue;
 781
 782                 sep = os_strchr(cred->imsi, '-');
 783                 if (sep == NULL ||
 784                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
 785                         continue;
 786                 mnc_len = sep - cred->imsi - 3;
 787                 imsi = cred->imsi;
 788
 789 #ifdef PCSC_FUNCS
 790         compare:
 791 #endif /* PCSC_FUNCS */
 792                 if (plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len))
 793                         break;
 794         }
 795         if (cred == NULL)
 796                 return -1;
 797
 798         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 799         if (ie == NULL)
 800                 return -1;
 801         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 802                    MAC2STR(bss->bssid));
 803
 804         ssid = wpa_config_add_network(wpa_s->conf);
 805         if (ssid == NULL)
 806                 return -1;
 807         ssid->parent_cred = cred;
 808
 809         wpas_notify_network_added(wpa_s, ssid);
 810         wpa_config_set_network_defaults(ssid);
 811         ssid->priority = cred->priority;
 812         ssid->temporary = 1;
 813         ssid->ssid = os_zalloc(ie[1] + 1);
 814         if (ssid->ssid == NULL)
 815                 goto fail;
 816         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 817         ssid->ssid_len = ie[1];
 818
 819         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 820                 goto fail;
 821
 822         eap_type = EAP_TYPE_SIM;
 823         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 824                 eap_type = EAP_TYPE_AKA;
 825         if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
 826                 if (cred->eap_method[0].method == EAP_TYPE_SIM ||
 827                     cred->eap_method[0].method == EAP_TYPE_AKA ||
 828                     cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
 829                         eap_type = cred->eap_method[0].method;
 830         }
 831
 832         switch (eap_type) {
 833         case EAP_TYPE_SIM:
 834                 prefix = '1';
 835                 res = wpa_config_set(ssid, "eap", "SIM", 0);
 836                 break;
 837         case EAP_TYPE_AKA:
 838                 prefix = '0';
 839                 res = wpa_config_set(ssid, "eap", "AKA", 0);
 840                 break;
 841         case EAP_TYPE_AKA_PRIME:
 842                 prefix = '6';
 843                 res = wpa_config_set(ssid, "eap", "AKA'", 0);
 844                 break;
 845         default:
 846                 res = -1;
 847                 break;
 848         }
 849         if (res < 0) {
 850                 wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
 851                            eap_type);
 852                 goto fail;
 853         }
 854
 855         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
 856                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 857                 goto fail;
 858         }
 859
 860         if (cred->milenage && cred->milenage[0]) {
 861                 if (wpa_config_set_quoted(ssid, "password",
 862                                           cred->milenage) < 0)
 863                         goto fail;
 864         } else if (cred->pcsc) {
 865                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 866                         goto fail;
 867                 if (wpa_s->conf->pcsc_pin &&
 868                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 869                     < 0)
 870                         goto fail;
 871         }
 872
 873         if (cred->password && cred->password[0] &&
 874             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 875                 goto fail;
 876
 877         wpa_config_update_prio_list(wpa_s->conf);
 878         interworking_reconnect(wpa_s);
 879
 880         return 0;
 881
 882 fail:
 883         wpas_notify_network_removed(wpa_s, ssid);
 884         wpa_config_remove_network(wpa_s->conf, ssid->id);
 885 #endif /* INTERWORKING_3GPP */
 886         return -1;
 887 }
 888
 889
 890 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 891                                             size_t rc_len)
 892 {
 893         const u8 *pos, *end;
 894         u8 lens;
 895
 896         if (ie == NULL)
 897                 return 0;
 898
 899         pos = ie + 2;
 900         end = ie + 2 + ie[1];
 901
 902         /* Roaming Consortium element:
 903          * Number of ANQP OIs
 904          * OI #1 and #2 lengths
 905          * OI #1, [OI #2], [OI #3]
 906          */
 907
 908         if (pos + 2 > end)
 909                 return 0;
 910
 911         pos++; /* skip Number of ANQP OIs */
 912         lens = *pos++;
 913         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 914                 return 0;
 915
 916         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 917                 return 1;
 918         pos += lens & 0x0f;
 919
 920         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 921                 return 1;
 922         pos += lens >> 4;
 923
 924         if (pos < end && (size_t) (end - pos) == rc_len &&
 925             os_memcmp(pos, rc_id, rc_len) == 0)
 926                 return 1;
 927
 928         return 0;
 929 }
 930
 931
 932 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 933                                          const u8 *rc_id, size_t rc_len)
 934 {
 935         const u8 *pos, *end;
 936         u8 len;
 937
 938         if (anqp == NULL)
 939                 return 0;
 940
 941         pos = wpabuf_head(anqp);
 942         end = pos + wpabuf_len(anqp);
 943
 944         /* Set of <OI Length, OI> duples */
 945         while (pos < end) {
 946                 len = *pos++;
 947                 if (pos + len > end)
 948                         break;
 949                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 950                         return 1;
 951                 pos += len;
 952         }
 953
 954         return 0;
 955 }
 956
 957
 958 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
 959                                     const u8 *rc_id, size_t rc_len)
 960 {
 961         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
 962                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
 963 }
 964
 965
 966 static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
 967 {
 968         size_t i;
 969
 970         if (!cred->excluded_ssid)
 971                 return 0;
 972
 973         for (i = 0; i < cred->num_excluded_ssid; i++) {
 974                 struct excluded_ssid *e = &cred->excluded_ssid[i];
 975                 if (bss->ssid_len == e->ssid_len &&
 976                     os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
 977                         return 1;
 978         }
 979
 980         return 0;
 981 }
 982
 983
 984 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 985         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 986 {
 987         struct wpa_cred *cred, *selected = NULL;
 988         const u8 *ie;
 989
 990         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 991
 992         if (ie == NULL &&
 993             (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
 994                 return NULL;
 995
 996         if (wpa_s->conf->cred == NULL)
 997                 return NULL;
 998
 999         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1000                 if (cred->roaming_consortium_len == 0)
1001                         continue;
1002
1003                 if (!roaming_consortium_match(ie,
1004                                               bss->anqp ?
1005                                               bss->anqp->roaming_consortium :
1006                                               NULL,
1007                                               cred->roaming_consortium,
1008                                               cred->roaming_consortium_len))
1009                         continue;
1010
1011                 if (cred_excluded_ssid(cred, bss))
1012                         continue;
1013
1014                 if (selected == NULL ||
1015                     selected->priority < cred->priority)
1016                         selected = cred;
1017         }
1018
1019         return selected;
1020 }
1021
1022
1023 static int interworking_set_eap_params(struct wpa_ssid *ssid,
1024                                        struct wpa_cred *cred, int ttls)
1025 {
1026         if (cred->eap_method) {
1027                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
1028                         cred->eap_method->method == EAP_TYPE_TTLS;
1029
1030                 os_free(ssid->eap.eap_methods);
1031                 ssid->eap.eap_methods =
1032                         os_malloc(sizeof(struct eap_method_type) * 2);
1033                 if (ssid->eap.eap_methods == NULL)
1034                         return -1;
1035                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
1036                           sizeof(*cred->eap_method));
1037                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
1038                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
1039         }
1040
1041         if (ttls && cred->username && cred->username[0]) {
1042                 const char *pos;
1043                 char *anon;
1044                 /* Use anonymous NAI in Phase 1 */
1045                 pos = os_strchr(cred->username, '@');
1046                 if (pos) {
1047                         size_t buflen = 9 + os_strlen(pos) + 1;
1048                         anon = os_malloc(buflen);
1049                         if (anon == NULL)
1050                                 return -1;
1051                         os_snprintf(anon, buflen, "anonymous%s", pos);
1052                 } else if (cred->realm) {
1053                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
1054                         anon = os_malloc(buflen);
1055                         if (anon == NULL)
1056                                 return -1;
1057                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
1058                 } else {
1059                         anon = os_strdup("anonymous");
1060                         if (anon == NULL)
1061                                 return -1;
1062                 }
1063                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
1064                     0) {
1065                         os_free(anon);
1066                         return -1;
1067                 }
1068                 os_free(anon);
1069         }
1070
1071         if (cred->username && cred->username[0] &&
1072             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
1073                 return -1;
1074
1075         if (cred->password && cred->password[0]) {
1076                 if (cred->ext_password &&
1077                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
1078                         return -1;
1079                 if (!cred->ext_password &&
1080                     wpa_config_set_quoted(ssid, "password", cred->password) <
1081                     0)
1082                         return -1;
1083         }
1084
1085         if (cred->client_cert && cred->client_cert[0] &&
1086             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
1087                 return -1;
1088
1089 #ifdef ANDROID
1090         if (cred->private_key &&
1091             os_strncmp(cred->private_key, "keystore://", 11) == 0) {
1092                 /* Use OpenSSL engine configuration for Android keystore */
1093                 if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
1094                     wpa_config_set_quoted(ssid, "key_id",
1095                                           cred->private_key + 11) < 0 ||
1096                     wpa_config_set(ssid, "engine", "1", 0) < 0)
1097                         return -1;
1098         } else
1099 #endif /* ANDROID */
1100         if (cred->private_key && cred->private_key[0] &&
1101             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
1102                 return -1;
1103
1104         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
1105             wpa_config_set_quoted(ssid, "private_key_passwd",
1106                                   cred->private_key_passwd) < 0)
1107                 return -1;
1108
1109         if (cred->phase1) {
1110                 os_free(ssid->eap.phase1);
1111                 ssid->eap.phase1 = os_strdup(cred->phase1);
1112         }
1113         if (cred->phase2) {
1114                 os_free(ssid->eap.phase2);
1115                 ssid->eap.phase2 = os_strdup(cred->phase2);
1116         }
1117
1118         if (cred->ca_cert && cred->ca_cert[0] &&
1119             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
1120                 return -1;
1121
1122         return 0;
1123 }
1124
1125
1126 static int interworking_connect_roaming_consortium(
1127         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
1128         struct wpa_bss *bss, const u8 *ssid_ie)
1129 {
1130         struct wpa_ssid *ssid;
1131
1132         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
1133                    "roaming consortium match", MAC2STR(bss->bssid));
1134
1135         ssid = wpa_config_add_network(wpa_s->conf);
1136         if (ssid == NULL)
1137                 return -1;
1138         ssid->parent_cred = cred;
1139         wpas_notify_network_added(wpa_s, ssid);
1140         wpa_config_set_network_defaults(ssid);
1141         ssid->priority = cred->priority;
1142         ssid->temporary = 1;
1143         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
1144         if (ssid->ssid == NULL)
1145                 goto fail;
1146         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
1147         ssid->ssid_len = ssid_ie[1];
1148
1149         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1150                 goto fail;
1151
1152         if (cred->eap_method == NULL) {
1153                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
1154                            "credential using roaming consortium");
1155                 goto fail;
1156         }
1157
1158         if (interworking_set_eap_params(
1159                     ssid, cred,
1160                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
1161                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
1162                 goto fail;
1163
1164         wpa_config_update_prio_list(wpa_s->conf);
1165         interworking_reconnect(wpa_s);
1166
1167         return 0;
1168
1169 fail:
1170         wpas_notify_network_removed(wpa_s, ssid);
1171         wpa_config_remove_network(wpa_s->conf, ssid->id);
1172         return -1;
1173 }
1174
1175
1176 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1177 {
1178         struct wpa_cred *cred;
1179         struct wpa_ssid *ssid;
1180         struct nai_realm *realm;
1181         struct nai_realm_eap *eap = NULL;
1182         u16 count, i;
1183         char buf[100];
1184         const u8 *ie;
1185
1186         if (wpa_s->conf->cred == NULL || bss == NULL)
1187                 return -1;
1188         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1189         if (ie == NULL || ie[1] == 0) {
1190                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1191                            MACSTR, MAC2STR(bss->bssid));
1192                 return -1;
1193         }
1194
1195         if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1196                 /*
1197                  * We currently support only HS 2.0 networks and those are
1198                  * required to use WPA2-Enterprise.
1199                  */
1200                 wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
1201                            "RSN");
1202                 return -1;
1203         }
1204
1205         cred = interworking_credentials_available_roaming_consortium(wpa_s,
1206                                                                      bss);
1207         if (cred)
1208                 return interworking_connect_roaming_consortium(wpa_s, cred,
1209                                                                bss, ie);
1210
1211         realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
1212                                 &count);
1213         if (realm == NULL) {
1214                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1215                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1216                 count = 0;
1217         }
1218
1219         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1220                 for (i = 0; i < count; i++) {
1221                         if (!nai_realm_match(&realm[i], cred->realm))
1222                                 continue;
1223                         eap = nai_realm_find_eap(cred, &realm[i]);
1224                         if (eap)
1225                                 break;
1226                 }
1227                 if (eap)
1228                         break;
1229         }
1230
1231         if (!eap) {
1232                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
1233                         if (realm)
1234                                 nai_realm_free(realm, count);
1235                         return 0;
1236                 }
1237
1238                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1239                            "and EAP method found for " MACSTR,
1240                            MAC2STR(bss->bssid));
1241                 nai_realm_free(realm, count);
1242                 return -1;
1243         }
1244
1245         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1246                    MAC2STR(bss->bssid));
1247
1248         ssid = wpa_config_add_network(wpa_s->conf);
1249         if (ssid == NULL) {
1250                 nai_realm_free(realm, count);
1251                 return -1;
1252         }
1253         ssid->parent_cred = cred;
1254         wpas_notify_network_added(wpa_s, ssid);
1255         wpa_config_set_network_defaults(ssid);
1256         ssid->priority = cred->priority;
1257         ssid->temporary = 1;
1258         ssid->ssid = os_zalloc(ie[1] + 1);
1259         if (ssid->ssid == NULL)
1260                 goto fail;
1261         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1262         ssid->ssid_len = ie[1];
1263
1264         if (interworking_set_hs20_params(wpa_s, ssid) < 0)
1265                 goto fail;
1266
1267         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1268                                                      eap->method), 0) < 0)
1269                 goto fail;
1270
1271         switch (eap->method) {
1272         case EAP_TYPE_TTLS:
1273                 if (eap->inner_method) {
1274                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1275                                     eap_get_name(EAP_VENDOR_IETF,
1276                                                  eap->inner_method));
1277                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1278                                 goto fail;
1279                         break;
1280                 }
1281                 switch (eap->inner_non_eap) {
1282                 case NAI_REALM_INNER_NON_EAP_PAP:
1283                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1284                             0)
1285                                 goto fail;
1286                         break;
1287                 case NAI_REALM_INNER_NON_EAP_CHAP:
1288                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1289                             < 0)
1290                                 goto fail;
1291                         break;
1292                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1293                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1294                                            0) < 0)
1295                                 goto fail;
1296                         break;
1297                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1298                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1299                                            0) < 0)
1300                                 goto fail;
1301                         break;
1302                 default:
1303                         /* EAP params were not set - assume TTLS/MSCHAPv2 */
1304                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1305                                            0) < 0)
1306                                 goto fail;
1307                         break;
1308                 }
1309                 break;
1310         case EAP_TYPE_PEAP:
1311                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1312                             eap_get_name(EAP_VENDOR_IETF,
1313                                          eap->inner_method ?
1314                                          eap->inner_method :
1315                                          EAP_TYPE_MSCHAPV2));
1316                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1317                         goto fail;
1318                 break;
1319         case EAP_TYPE_TLS:
1320                 break;
1321         }
1322
1323         if (interworking_set_eap_params(ssid, cred,
1324                                         eap->method == EAP_TYPE_TTLS) < 0)
1325                 goto fail;
1326
1327         nai_realm_free(realm, count);
1328
1329         wpa_config_update_prio_list(wpa_s->conf);
1330         interworking_reconnect(wpa_s);
1331
1332         return 0;
1333
1334 fail:
1335         wpas_notify_network_removed(wpa_s, ssid);
1336         wpa_config_remove_network(wpa_s->conf, ssid->id);
1337         nai_realm_free(realm, count);
1338         return -1;
1339 }
1340
1341
1342 static struct wpa_cred * interworking_credentials_available_3gpp(
1343         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1344 {
1345         struct wpa_cred *cred, *selected = NULL;
1346         int ret;
1347
1348 #ifdef INTERWORKING_3GPP
1349         if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
1350                 return NULL;
1351
1352         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1353                 char *sep;
1354                 const char *imsi;
1355                 int mnc_len;
1356
1357 #ifdef PCSC_FUNCS
1358                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1359                     wpa_s->imsi[0]) {
1360                         imsi = wpa_s->imsi;
1361                         mnc_len = wpa_s->mnc_len;
1362                         goto compare;
1363                 }
1364 #endif /* PCSC_FUNCS */
1365
1366                 if (cred->imsi == NULL || !cred->imsi[0] ||
1367                     cred->milenage == NULL || !cred->milenage[0])
1368                         continue;
1369
1370                 sep = os_strchr(cred->imsi, '-');
1371                 if (sep == NULL ||
1372                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1373                         continue;
1374                 mnc_len = sep - cred->imsi - 3;
1375                 imsi = cred->imsi;
1376
1377 #ifdef PCSC_FUNCS
1378         compare:
1379 #endif /* PCSC_FUNCS */
1380                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1381                            MACSTR, MAC2STR(bss->bssid));
1382                 ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
1383                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1384                 if (ret) {
1385                         if (cred_excluded_ssid(cred, bss))
1386                                 continue;
1387                         if (selected == NULL ||
1388                             selected->priority < cred->priority)
1389                                 selected = cred;
1390                 }
1391         }
1392 #endif /* INTERWORKING_3GPP */
1393         return selected;
1394 }
1395
1396
1397 static struct wpa_cred * interworking_credentials_available_realm(
1398         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1399 {
1400         struct wpa_cred *cred, *selected = NULL;
1401         struct nai_realm *realm;
1402         u16 count, i;
1403
1404         if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
1405                 return NULL;
1406
1407         if (wpa_s->conf->cred == NULL)
1408                 return NULL;
1409
1410         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1411                    MACSTR, MAC2STR(bss->bssid));
1412         realm = nai_realm_parse(bss->anqp->nai_realm, &count);
1413         if (realm == NULL) {
1414                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1415                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1416                 return NULL;
1417         }
1418
1419         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1420                 if (cred->realm == NULL)
1421                         continue;
1422
1423                 for (i = 0; i < count; i++) {
1424                         if (!nai_realm_match(&realm[i], cred->realm))
1425                                 continue;
1426                         if (nai_realm_find_eap(cred, &realm[i])) {
1427                                 if (cred_excluded_ssid(cred, bss))
1428                                         continue;
1429                                 if (selected == NULL ||
1430                                     selected->priority < cred->priority)
1431                                         selected = cred;
1432                                 break;
1433                         }
1434                 }
1435         }
1436
1437         nai_realm_free(realm, count);
1438
1439         return selected;
1440 }
1441
1442
1443 static struct wpa_cred * interworking_credentials_available(
1444         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1445 {
1446         struct wpa_cred *cred, *cred2;
1447
1448         cred = interworking_credentials_available_realm(wpa_s, bss);
1449         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1450         if (cred && cred2 && cred2->priority >= cred->priority)
1451                 cred = cred2;
1452         if (!cred)
1453                 cred = cred2;
1454
1455         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1456                                                                       bss);
1457         if (cred && cred2 && cred2->priority >= cred->priority)
1458                 cred = cred2;
1459         if (!cred)
1460                 cred = cred2;
1461
1462         return cred;
1463 }
1464
1465
1466 static int domain_name_list_contains(struct wpabuf *domain_names,
1467                                      const char *domain)
1468 {
1469         const u8 *pos, *end;
1470         size_t len;
1471
1472         len = os_strlen(domain);
1473         pos = wpabuf_head(domain_names);
1474         end = pos + wpabuf_len(domain_names);
1475
1476         while (pos + 1 < end) {
1477                 if (pos + 1 + pos[0] > end)
1478                         break;
1479
1480                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1481                                   pos + 1, pos[0]);
1482                 if (pos[0] == len &&
1483                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1484                         return 1;
1485
1486                 pos += 1 + pos[0];
1487         }
1488
1489         return 0;
1490 }
1491
1492
1493 int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
1494                               struct wpa_cred *cred,
1495                               struct wpabuf *domain_names)
1496 {
1497 #ifdef INTERWORKING_3GPP
1498         char nai[100], *realm;
1499
1500         char *imsi = NULL;
1501         int mnc_len = 0;
1502         if (cred->imsi)
1503                 imsi = cred->imsi;
1504 #ifdef CONFIG_PCSC
1505         else if (cred->pcsc && wpa_s->conf->pcsc_reader &&
1506                  wpa_s->scard && wpa_s->imsi[0]) {
1507                 imsi = wpa_s->imsi;
1508                 mnc_len = wpa_s->mnc_len;
1509         }
1510 #endif /* CONFIG_PCSC */
1511         if (domain_names &&
1512             imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
1513                 realm = os_strchr(nai, '@');
1514                 if (realm)
1515                         realm++;
1516                 wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1517                            "with SIM/USIM domain %s", realm);
1518                 if (realm &&
1519                     domain_name_list_contains(domain_names, realm))
1520                         return 1;
1521         }
1522 #endif /* INTERWORKING_3GPP */
1523
1524         if (domain_names == NULL || cred->domain == NULL)
1525                 return 0;
1526
1527         wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1528                    "home SP FQDN %s", cred->domain);
1529         if (domain_name_list_contains(domain_names, cred->domain))
1530                 return 1;
1531
1532         return 0;
1533 }
1534
1535
1536 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1537                                 struct wpabuf *domain_names)
1538 {
1539         struct wpa_cred *cred;
1540
1541         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1542                 return -1;
1543
1544         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1545                 int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
1546                 if (res)
1547                         return res;
1548         }
1549
1550         return 0;
1551 }
1552
1553
1554 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1555 {
1556         struct wpa_bss *bss;
1557         struct wpa_ssid *ssid;
1558
1559         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1560                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1561                         if (wpas_network_disabled(wpa_s, ssid) ||
1562                             ssid->mode != WPAS_MODE_INFRA)
1563                                 continue;
1564                         if (ssid->ssid_len != bss->ssid_len ||
1565                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1566                             0)
1567                                 continue;
1568                         /*
1569                          * TODO: Consider more accurate matching of security
1570                          * configuration similarly to what is done in events.c
1571                          */
1572                         return 1;
1573                 }
1574         }
1575
1576         return 0;
1577 }
1578
1579
1580 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1581 {
1582         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1583         int selected_prio = -999999, selected_home_prio = -999999;
1584         unsigned int count = 0;
1585         const char *type;
1586         int res;
1587         struct wpa_cred *cred;
1588
1589         wpa_s->network_select = 0;
1590
1591         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1592                 cred = interworking_credentials_available(wpa_s, bss);
1593                 if (!cred)
1594                         continue;
1595                 if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
1596                         /*
1597                          * We currently support only HS 2.0 networks and those
1598                          * are required to use WPA2-Enterprise.
1599                          */
1600                         wpa_printf(MSG_DEBUG, "Interworking: Credential match "
1601                                    "with " MACSTR " but network does not use "
1602                                    "RSN", MAC2STR(bss->bssid));
1603                         continue;
1604                 }
1605                 count++;
1606                 res = interworking_home_sp(wpa_s, bss->anqp ?
1607                                            bss->anqp->domain_name : NULL);
1608                 if (res > 0)
1609                         type = "home";
1610                 else if (res == 0)
1611                         type = "roaming";
1612                 else
1613                         type = "unknown";
1614                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1615                         MAC2STR(bss->bssid), type);
1616                 if (wpa_s->auto_select ||
1617                     (wpa_s->conf->auto_interworking &&
1618                      wpa_s->auto_network_select)) {
1619                         if (selected == NULL ||
1620                             cred->priority > selected_prio) {
1621                                 selected = bss;
1622                                 selected_prio = cred->priority;
1623                         }
1624                         if (res > 0 &&
1625                             (selected_home == NULL ||
1626                              cred->priority > selected_home_prio)) {
1627                                 selected_home = bss;
1628                                 selected_home_prio = cred->priority;
1629                         }
1630                 }
1631         }
1632
1633         if (selected_home && selected_home != selected &&
1634             selected_home_prio >= selected_prio) {
1635                 /* Prefer network operated by the Home SP */
1636                 selected = selected_home;
1637         }
1638
1639         if (count == 0) {
1640                 /*
1641                  * No matching network was found based on configured
1642                  * credentials. Check whether any of the enabled network blocks
1643                  * have matching APs.
1644                  */
1645                 if (interworking_find_network_match(wpa_s)) {
1646                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1647                                    "match for enabled network configurations");
1648                         if (wpa_s->auto_select)
1649                                 interworking_reconnect(wpa_s);
1650                         return;
1651                 }
1652
1653                 if (wpa_s->auto_network_select) {
1654                         wpa_printf(MSG_DEBUG, "Interworking: Continue "
1655                                    "scanning after ANQP fetch");
1656                         wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
1657                                                 0);
1658                         return;
1659                 }
1660
1661                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1662                         "with matching credentials found");
1663         }
1664
1665         if (selected)
1666                 interworking_connect(wpa_s, selected);
1667 }
1668
1669
1670 static struct wpa_bss_anqp *
1671 interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1672 {
1673         struct wpa_bss *other;
1674
1675         if (is_zero_ether_addr(bss->hessid))
1676                 return NULL; /* Cannot be in the same homegenous ESS */
1677
1678         dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
1679                 if (other == bss)
1680                         continue;
1681                 if (other->anqp == NULL)
1682                         continue;
1683                 if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
1684                         continue;
1685                 if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
1686                         continue;
1687                 if (bss->ssid_len != other->ssid_len ||
1688                     os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
1689                         continue;
1690
1691                 wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
1692                            "already fetched BSSID " MACSTR " and " MACSTR,
1693                            MAC2STR(other->bssid), MAC2STR(bss->bssid));
1694                 other->anqp->users++;
1695                 return other->anqp;
1696         }
1697
1698         return NULL;
1699 }
1700
1701
1702 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1703 {
1704         struct wpa_bss *bss;
1705         int found = 0;
1706         const u8 *ie;
1707
1708         if (!wpa_s->fetch_anqp_in_progress)
1709                 return;
1710
1711         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1712                 if (!(bss->caps & IEEE80211_CAP_ESS))
1713                         continue;
1714                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1715                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1716                         continue; /* AP does not support Interworking */
1717
1718                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1719                         if (bss->anqp == NULL) {
1720                                 bss->anqp = interworking_match_anqp_info(wpa_s,
1721                                                                          bss);
1722                                 if (bss->anqp) {
1723                                         /* Shared data already fetched */
1724                                         continue;
1725                                 }
1726                                 bss->anqp = wpa_bss_anqp_alloc();
1727                                 if (bss->anqp == NULL)
1728                                         break;
1729                         }
1730                         found++;
1731                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1732                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1733                                 MACSTR, MAC2STR(bss->bssid));
1734                         interworking_anqp_send_req(wpa_s, bss);
1735                         break;
1736                 }
1737         }
1738
1739         if (found == 0) {
1740                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1741                 wpa_s->fetch_anqp_in_progress = 0;
1742                 if (wpa_s->network_select)
1743                         interworking_select_network(wpa_s);
1744         }
1745 }
1746
1747
1748 void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1749 {
1750         struct wpa_bss *bss;
1751
1752         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1753                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1754
1755         wpa_s->fetch_anqp_in_progress = 1;
1756         interworking_next_anqp_fetch(wpa_s);
1757 }
1758
1759
1760 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1761 {
1762         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1763                 return 0;
1764
1765         wpa_s->network_select = 0;
1766         wpa_s->fetch_all_anqp = 1;
1767
1768         interworking_start_fetch_anqp(wpa_s);
1769
1770         return 0;
1771 }
1772
1773
1774 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1775 {
1776         if (!wpa_s->fetch_anqp_in_progress)
1777                 return;
1778
1779         wpa_s->fetch_anqp_in_progress = 0;
1780 }
1781
1782
1783 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1784                   u16 info_ids[], size_t num_ids)
1785 {
1786         struct wpabuf *buf;
1787         int ret = 0;
1788         int freq;
1789         struct wpa_bss *bss;
1790         int res;
1791
1792         freq = wpa_s->assoc_freq;
1793         bss = wpa_bss_get_bssid(wpa_s, dst);
1794         if (bss) {
1795                 wpa_bss_anqp_unshare_alloc(bss);
1796                 freq = bss->freq;
1797         }
1798         if (freq <= 0)
1799                 return -1;
1800
1801         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1802                    MAC2STR(dst), (unsigned int) num_ids);
1803
1804         buf = anqp_build_req(info_ids, num_ids, NULL);
1805         if (buf == NULL)
1806                 return -1;
1807
1808         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1809         if (res < 0) {
1810                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1811                 ret = -1;
1812         } else
1813                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1814                            "%u", res);
1815
1816         wpabuf_free(buf);
1817         return ret;
1818 }
1819
1820
1821 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1822                                             const u8 *sa, u16 info_id,
1823                                             const u8 *data, size_t slen)
1824 {
1825         const u8 *pos = data;
1826         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1827         struct wpa_bss_anqp *anqp = NULL;
1828 #ifdef CONFIG_HS20
1829         u8 type;
1830 #endif /* CONFIG_HS20 */
1831
1832         if (bss)
1833                 anqp = bss->anqp;
1834
1835         switch (info_id) {
1836         case ANQP_CAPABILITY_LIST:
1837                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1838                         " ANQP Capability list", MAC2STR(sa));
1839                 break;
1840         case ANQP_VENUE_NAME:
1841                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1842                         " Venue Name", MAC2STR(sa));
1843                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1844                 if (anqp) {
1845                         wpabuf_free(anqp->venue_name);
1846                         anqp->venue_name = wpabuf_alloc_copy(pos, slen);
1847                 }
1848                 break;
1849         case ANQP_NETWORK_AUTH_TYPE:
1850                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1851                         " Network Authentication Type information",
1852                         MAC2STR(sa));
1853                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1854                                   "Type", pos, slen);
1855                 if (anqp) {
1856                         wpabuf_free(anqp->network_auth_type);
1857                         anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
1858                 }
1859                 break;
1860         case ANQP_ROAMING_CONSORTIUM:
1861                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1862                         " Roaming Consortium list", MAC2STR(sa));
1863                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1864                                   pos, slen);
1865                 if (anqp) {
1866                         wpabuf_free(anqp->roaming_consortium);
1867                         anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
1868                 }
1869                 break;
1870         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1871                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1872                         " IP Address Type Availability information",
1873                         MAC2STR(sa));
1874                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1875                             pos, slen);
1876                 if (anqp) {
1877                         wpabuf_free(anqp->ip_addr_type_availability);
1878                         anqp->ip_addr_type_availability =
1879                                 wpabuf_alloc_copy(pos, slen);
1880                 }
1881                 break;
1882         case ANQP_NAI_REALM:
1883                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1884                         " NAI Realm list", MAC2STR(sa));
1885                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1886                 if (anqp) {
1887                         wpabuf_free(anqp->nai_realm);
1888                         anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
1889                 }
1890                 break;
1891         case ANQP_3GPP_CELLULAR_NETWORK:
1892                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1893                         " 3GPP Cellular Network information", MAC2STR(sa));
1894                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1895                                   pos, slen);
1896                 if (anqp) {
1897                         wpabuf_free(anqp->anqp_3gpp);
1898                         anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1899                 }
1900                 break;
1901         case ANQP_DOMAIN_NAME:
1902                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1903                         " Domain Name list", MAC2STR(sa));
1904                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1905                 if (anqp) {
1906                         wpabuf_free(anqp->domain_name);
1907                         anqp->domain_name = wpabuf_alloc_copy(pos, slen);
1908                 }
1909                 break;
1910         case ANQP_VENDOR_SPECIFIC:
1911                 if (slen < 3)
1912                         return;
1913
1914                 switch (WPA_GET_BE24(pos)) {
1915 #ifdef CONFIG_HS20
1916                 case OUI_WFA:
1917                         pos += 3;
1918                         slen -= 3;
1919
1920                         if (slen < 1)
1921                                 return;
1922                         type = *pos++;
1923                         slen--;
1924
1925                         switch (type) {
1926                         case HS20_ANQP_OUI_TYPE:
1927                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1928                                                              slen);
1929                                 break;
1930                         default:
1931                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1932                                            "vendor type %u", type);
1933                                 break;
1934                         }
1935                         break;
1936 #endif /* CONFIG_HS20 */
1937                 default:
1938                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1939                                    "vendor-specific ANQP OUI %06x",
1940                                    WPA_GET_BE24(pos));
1941                         return;
1942                 }
1943                 break;
1944         default:
1945                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1946                            "%u", info_id);
1947                 break;
1948         }
1949 }
1950
1951
1952 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1953                   enum gas_query_result result,
1954                   const struct wpabuf *adv_proto,
1955                   const struct wpabuf *resp, u16 status_code)
1956 {
1957         struct wpa_supplicant *wpa_s = ctx;
1958         const u8 *pos;
1959         const u8 *end;
1960         u16 info_id;
1961         u16 slen;
1962
1963         if (result != GAS_QUERY_SUCCESS)
1964                 return;
1965
1966         pos = wpabuf_head(adv_proto);
1967         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1968             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1969                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1970                            "Protocol in response");
1971                 return;
1972         }
1973
1974         pos = wpabuf_head(resp);
1975         end = pos + wpabuf_len(resp);
1976
1977         while (pos < end) {
1978                 if (pos + 4 > end) {
1979                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1980                         break;
1981                 }
1982                 info_id = WPA_GET_LE16(pos);
1983                 pos += 2;
1984                 slen = WPA_GET_LE16(pos);
1985                 pos += 2;
1986                 if (pos + slen > end) {
1987                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1988                                    "for Info ID %u", info_id);
1989                         break;
1990                 }
1991                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1992                                                 slen);
1993                 pos += slen;
1994         }
1995 }
1996
1997
1998 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1999                                           struct wpa_scan_results *scan_res)
2000 {
2001         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
2002                    "ANQP fetch");
2003         interworking_start_fetch_anqp(wpa_s);
2004 }
2005
2006
2007 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
2008 {
2009         interworking_stop_fetch_anqp(wpa_s);
2010         wpa_s->network_select = 1;
2011         wpa_s->auto_network_select = 0;
2012         wpa_s->auto_select = !!auto_select;
2013         wpa_s->fetch_all_anqp = 0;
2014         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
2015                    "selection");
2016         wpa_s->scan_res_handler = interworking_scan_res_handler;
2017         wpa_s->scan_req = MANUAL_SCAN_REQ;
2018         wpa_supplicant_req_scan(wpa_s, 0, 0);
2019
2020         return 0;
2021 }
2022
2023
2024 static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
2025                         enum gas_query_result result,
2026                         const struct wpabuf *adv_proto,
2027                         const struct wpabuf *resp, u16 status_code)
2028 {
2029         struct wpa_supplicant *wpa_s = ctx;
2030
2031         wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
2032                 " dialog_token=%d status_code=%d resp_len=%d",
2033                 MAC2STR(addr), dialog_token, status_code,
2034                 resp ? (int) wpabuf_len(resp) : -1);
2035         if (!resp)
2036                 return;
2037
2038         wpabuf_free(wpa_s->last_gas_resp);
2039         wpa_s->last_gas_resp = wpabuf_dup(resp);
2040         if (wpa_s->last_gas_resp == NULL)
2041                 return;
2042         os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
2043         wpa_s->last_gas_dialog_token = dialog_token;
2044 }
2045
2046
2047 int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
2048                      const struct wpabuf *adv_proto,
2049                      const struct wpabuf *query)
2050 {
2051         struct wpabuf *buf;
2052         int ret = 0;
2053         int freq;
2054         struct wpa_bss *bss;
2055         int res;
2056         size_t len;
2057         u8 query_resp_len_limit = 0, pame_bi = 0;
2058
2059         freq = wpa_s->assoc_freq;
2060         bss = wpa_bss_get_bssid(wpa_s, dst);
2061         if (bss)
2062                 freq = bss->freq;
2063         if (freq <= 0)
2064                 return -1;
2065
2066         wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
2067                    MAC2STR(dst), freq);
2068         wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
2069         wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
2070
2071         len = 3 + wpabuf_len(adv_proto) + 2;
2072         if (query)
2073                 len += wpabuf_len(query);
2074         buf = gas_build_initial_req(0, len);
2075         if (buf == NULL)
2076                 return -1;
2077
2078         /* Advertisement Protocol IE */
2079         wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
2080         wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
2081         wpabuf_put_u8(buf, (query_resp_len_limit & 0x7f) |
2082                       (pame_bi ? 0x80 : 0));
2083         wpabuf_put_buf(buf, adv_proto);
2084
2085         /* GAS Query */
2086         if (query) {
2087                 wpabuf_put_le16(buf, wpabuf_len(query));
2088                 wpabuf_put_buf(buf, query);
2089         } else
2090                 wpabuf_put_le16(buf, 0);
2091
2092         res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
2093         if (res < 0) {
2094                 wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
2095                 ret = -1;
2096         } else
2097                 wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
2098                            "%u", res);
2099
2100         wpabuf_free(buf);
2101         return ret;
2102 }