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 "drivers/driver.h"
  17 #include "eap_common/eap_defs.h"
  18 #include "eap_peer/eap_methods.h"
  19 #include "wpa_supplicant_i.h"
  20 #include "config.h"
  21 #include "config_ssid.h"
  22 #include "bss.h"
  23 #include "scan.h"
  24 #include "notify.h"
  25 #include "gas_query.h"
  26 #include "interworking.h"
  27
  28
  29 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  30 #define INTERWORKING_3GPP
  31 #else
  32 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  33 #define INTERWORKING_3GPP
  34 #else
  35 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  36 #define INTERWORKING_3GPP
  37 #endif
  38 #endif
  39 #endif
  40
  41 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  42
  43
  44 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  45                                       struct wpabuf *extra)
  46 {
  47         struct wpabuf *buf;
  48         size_t i;
  49         u8 *len_pos;
  50
  51         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  52                                          (extra ? wpabuf_len(extra) : 0));
  53         if (buf == NULL)
  54                 return NULL;
  55
  56         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  57         for (i = 0; i < num_ids; i++)
  58                 wpabuf_put_le16(buf, info_ids[i]);
  59         gas_anqp_set_element_len(buf, len_pos);
  60         if (extra)
  61                 wpabuf_put_buf(buf, extra);
  62
  63         gas_anqp_set_len(buf);
  64
  65         return buf;
  66 }
  67
  68
  69 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  70                                       u8 dialog_token,
  71                                       enum gas_query_result result,
  72                                       const struct wpabuf *adv_proto,
  73                                       const struct wpabuf *resp,
  74                                       u16 status_code)
  75 {
  76         struct wpa_supplicant *wpa_s = ctx;
  77
  78         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
  79                      status_code);
  80         interworking_next_anqp_fetch(wpa_s);
  81 }
  82
  83
  84 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
  85                                       struct wpa_bss *bss)
  86 {
  87         struct wpabuf *buf;
  88         int ret = 0;
  89         int res;
  90         u16 info_ids[] = {
  91                 ANQP_CAPABILITY_LIST,
  92                 ANQP_VENUE_NAME,
  93                 ANQP_NETWORK_AUTH_TYPE,
  94                 ANQP_ROAMING_CONSORTIUM,
  95                 ANQP_IP_ADDR_TYPE_AVAILABILITY,
  96                 ANQP_NAI_REALM,
  97                 ANQP_3GPP_CELLULAR_NETWORK,
  98                 ANQP_DOMAIN_NAME
  99         };
 100         struct wpabuf *extra = NULL;
 101
 102         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 103                    MAC2STR(bss->bssid));
 104
 105         buf = anqp_build_req(info_ids, sizeof(info_ids) / sizeof(info_ids[0]),
 106                              extra);
 107         wpabuf_free(extra);
 108         if (buf == NULL)
 109                 return -1;
 110
 111         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 112                             interworking_anqp_resp_cb, wpa_s);
 113         if (res < 0) {
 114                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 115                 ret = -1;
 116         } else
 117                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 118                            "%u", res);
 119
 120         wpabuf_free(buf);
 121         return ret;
 122 }
 123
 124
 125 struct nai_realm_eap {
 126         u8 method;
 127         u8 inner_method;
 128         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 129         u8 cred_type;
 130         u8 tunneled_cred_type;
 131 };
 132
 133 struct nai_realm {
 134         u8 encoding;
 135         char *realm;
 136         u8 eap_count;
 137         struct nai_realm_eap *eap;
 138 };
 139
 140
 141 static void nai_realm_free(struct nai_realm *realms, u16 count)
 142 {
 143         u16 i;
 144
 145         if (realms == NULL)
 146                 return;
 147         for (i = 0; i < count; i++) {
 148                 os_free(realms[i].eap);
 149                 os_free(realms[i].realm);
 150         }
 151         os_free(realms);
 152 }
 153
 154
 155 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 156                                       const u8 *end)
 157 {
 158         u8 elen, auth_count, a;
 159         const u8 *e_end;
 160
 161         if (pos + 3 > end) {
 162                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 163                 return NULL;
 164         }
 165
 166         elen = *pos++;
 167         if (pos + elen > end || elen < 2) {
 168                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 169                 return NULL;
 170         }
 171         e_end = pos + elen;
 172         e->method = *pos++;
 173         auth_count = *pos++;
 174         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 175                    elen, e->method, auth_count);
 176
 177         for (a = 0; a < auth_count; a++) {
 178                 u8 id, len;
 179
 180                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 181                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 182                                    "Parameter subfield");
 183                         return NULL;
 184                 }
 185
 186                 id = *pos++;
 187                 len = *pos++;
 188
 189                 switch (id) {
 190                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 191                         if (len < 1)
 192                                 break;
 193                         e->inner_non_eap = *pos;
 194                         if (e->method != EAP_TYPE_TTLS)
 195                                 break;
 196                         switch (*pos) {
 197                         case NAI_REALM_INNER_NON_EAP_PAP:
 198                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 199                                 break;
 200                         case NAI_REALM_INNER_NON_EAP_CHAP:
 201                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 202                                 break;
 203                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 204                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 205                                 break;
 206                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 207                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 208                                 break;
 209                         }
 210                         break;
 211                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 212                         if (len < 1)
 213                                 break;
 214                         e->inner_method = *pos;
 215                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 216                                    e->inner_method);
 217                         break;
 218                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 219                         if (len < 1)
 220                                 break;
 221                         e->cred_type = *pos;
 222                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 223                                    e->cred_type);
 224                         break;
 225                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 226                         if (len < 1)
 227                                 break;
 228                         e->tunneled_cred_type = *pos;
 229                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 230                                    "Type: %u", e->tunneled_cred_type);
 231                         break;
 232                 default:
 233                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 234                                    "Parameter: id=%u len=%u", id, len);
 235                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 236                                     "Value", pos, len);
 237                         break;
 238                 }
 239
 240                 pos += len;
 241         }
 242
 243         return e_end;
 244 }
 245
 246
 247 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 248                                         const u8 *end)
 249 {
 250         u16 len;
 251         const u8 *f_end;
 252         u8 realm_len, e;
 253
 254         if (end - pos < 4) {
 255                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 256                            "fixed fields");
 257                 return NULL;
 258         }
 259
 260         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 261         pos += 2;
 262         if (pos + len > end || len < 3) {
 263                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 264                            "(len=%u; left=%u)",
 265                            len, (unsigned int) (end - pos));
 266                 return NULL;
 267         }
 268         f_end = pos + len;
 269
 270         r->encoding = *pos++;
 271         realm_len = *pos++;
 272         if (pos + realm_len > f_end) {
 273                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 274                            "(len=%u; left=%u)",
 275                            realm_len, (unsigned int) (f_end - pos));
 276                 return NULL;
 277         }
 278         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 279         r->realm = os_malloc(realm_len + 1);
 280         if (r->realm == NULL)
 281                 return NULL;
 282         os_memcpy(r->realm, pos, realm_len);
 283         r->realm[realm_len] = '\0';
 284         pos += realm_len;
 285
 286         if (pos + 1 > f_end) {
 287                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 288                 return NULL;
 289         }
 290         r->eap_count = *pos++;
 291         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 292         if (pos + r->eap_count * 3 > f_end) {
 293                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 294                 return NULL;
 295         }
 296         r->eap = os_zalloc(r->eap_count * sizeof(struct nai_realm_eap));
 297         if (r->eap == NULL)
 298                 return NULL;
 299
 300         for (e = 0; e < r->eap_count; e++) {
 301                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 302                 if (pos == NULL)
 303                         return NULL;
 304         }
 305
 306         return f_end;
 307 }
 308
 309
 310 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 311 {
 312         struct nai_realm *realm;
 313         const u8 *pos, *end;
 314         u16 i, num;
 315
 316         if (anqp == NULL || wpabuf_len(anqp) < 2)
 317                 return NULL;
 318
 319         pos = wpabuf_head_u8(anqp);
 320         end = pos + wpabuf_len(anqp);
 321         num = WPA_GET_LE16(pos);
 322         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 323         pos += 2;
 324
 325         if (num * 5 > end - pos) {
 326                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 327                            "enough data (%u octets) for that many realms",
 328                            num, (unsigned int) (end - pos));
 329                 return NULL;
 330         }
 331
 332         realm = os_zalloc(num * sizeof(struct nai_realm));
 333         if (realm == NULL)
 334                 return NULL;
 335
 336         for (i = 0; i < num; i++) {
 337                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 338                 if (pos == NULL) {
 339                         nai_realm_free(realm, num);
 340                         return NULL;
 341                 }
 342         }
 343
 344         *count = num;
 345         return realm;
 346 }
 347
 348
 349 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 350 {
 351         char *tmp, *pos, *end;
 352         int match = 0;
 353
 354         if (realm->realm == NULL || home_realm == NULL)
 355                 return 0;
 356
 357         if (os_strchr(realm->realm, ';') == NULL)
 358                 return os_strcasecmp(realm->realm, home_realm) == 0;
 359
 360         tmp = os_strdup(realm->realm);
 361         if (tmp == NULL)
 362                 return 0;
 363
 364         pos = tmp;
 365         while (*pos) {
 366                 end = os_strchr(pos, ';');
 367                 if (end)
 368                         *end = '\0';
 369                 if (os_strcasecmp(pos, home_realm) == 0) {
 370                         match = 1;
 371                         break;
 372                 }
 373                 if (end == NULL)
 374                         break;
 375                 pos = end + 1;
 376         }
 377
 378         os_free(tmp);
 379
 380         return match;
 381 }
 382
 383
 384 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 385 {
 386         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 387                 return 0; /* method not supported */
 388
 389         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 390                 /* Only tunneled methods with username/password supported */
 391                 return 0;
 392         }
 393
 394         if (eap->method == EAP_TYPE_PEAP &&
 395             eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 396                 return 0;
 397
 398         if (eap->method == EAP_TYPE_TTLS) {
 399                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 400                         return 0;
 401                 if (eap->inner_method &&
 402                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 403                         return 0;
 404                 if (eap->inner_non_eap &&
 405                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 406                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 407                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 408                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 409                         return 0;
 410         }
 411
 412         if (eap->inner_method &&
 413             eap->inner_method != EAP_TYPE_GTC &&
 414             eap->inner_method != EAP_TYPE_MSCHAPV2)
 415                 return 0;
 416
 417         return 1;
 418 }
 419
 420
 421 static int nai_realm_cred_cert(struct nai_realm_eap *eap)
 422 {
 423         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 424                 return 0; /* method not supported */
 425
 426         if (eap->method != EAP_TYPE_TLS) {
 427                 /* Only EAP-TLS supported for credential authentication */
 428                 return 0;
 429         }
 430
 431         return 1;
 432 }
 433
 434
 435 static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
 436                                                  struct nai_realm *realm)
 437 {
 438         u8 e;
 439
 440         if (cred == NULL ||
 441             cred->username == NULL ||
 442             cred->username[0] == '\0' ||
 443             ((cred->password == NULL ||
 444               cred->password[0] == '\0') &&
 445              (cred->private_key == NULL ||
 446               cred->private_key[0] == '\0')))
 447                 return NULL;
 448
 449         for (e = 0; e < realm->eap_count; e++) {
 450                 struct nai_realm_eap *eap = &realm->eap[e];
 451                 if (cred->password && cred->password[0] &&
 452                     nai_realm_cred_username(eap))
 453                         return eap;
 454                 if (cred->private_key && cred->private_key[0] &&
 455                     nai_realm_cred_cert(eap))
 456                         return eap;
 457         }
 458
 459         return NULL;
 460 }
 461
 462
 463 #ifdef INTERWORKING_3GPP
 464
 465 static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
 466 {
 467         u8 plmn[3];
 468         const u8 *pos, *end;
 469         u8 udhl;
 470
 471         /* See Annex A of 3GPP TS 24.234 v8.1.0 for description */
 472         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 473         plmn[1] = imsi[2] - '0';
 474         /* default to MNC length 3 if unknown */
 475         if (mnc_len != 2)
 476                 plmn[1] |= (imsi[5] - '0') << 4;
 477         else
 478                 plmn[1] |= 0xf0;
 479         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 480
 481         if (anqp == NULL)
 482                 return 0;
 483         pos = wpabuf_head_u8(anqp);
 484         end = pos + wpabuf_len(anqp);
 485         if (pos + 2 > end)
 486                 return 0;
 487         if (*pos != 0) {
 488                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 489                 return 0;
 490         }
 491         pos++;
 492         udhl = *pos++;
 493         if (pos + udhl > end) {
 494                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 495                 return 0;
 496         }
 497         end = pos + udhl;
 498
 499         while (pos + 2 <= end) {
 500                 u8 iei, len;
 501                 const u8 *l_end;
 502                 iei = *pos++;
 503                 len = *pos++ & 0x7f;
 504                 if (pos + len > end)
 505                         break;
 506                 l_end = pos + len;
 507
 508                 if (iei == 0 && len > 0) {
 509                         /* PLMN List */
 510                         u8 num, i;
 511                         num = *pos++;
 512                         for (i = 0; i < num; i++) {
 513                                 if (pos + 3 > end)
 514                                         break;
 515                                 if (os_memcmp(pos, plmn, 3) == 0)
 516                                         return 1; /* Found matching PLMN */
 517                         }
 518                 }
 519
 520                 pos = l_end;
 521         }
 522
 523         return 0;
 524 }
 525
 526
 527 static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
 528                           char prefix)
 529 {
 530         const char *sep, *msin;
 531         char *end, *pos;
 532         size_t msin_len, plmn_len;
 533
 534         /*
 535          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 536          * Root NAI:
 537          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 538          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 539          */
 540
 541         if (imsi == NULL || os_strlen(imsi) > 16) {
 542                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 543                 return -1;
 544         }
 545         sep = os_strchr(imsi, '-');
 546         if (sep == NULL)
 547                 return -1;
 548         plmn_len = sep - imsi;
 549         if (plmn_len != 5 && plmn_len != 6)
 550                 return -1;
 551         msin = sep + 1;
 552         msin_len = os_strlen(msin);
 553
 554         pos = nai;
 555         end = nai + nai_len;
 556         if (prefix)
 557                 *pos++ = prefix;
 558         os_memcpy(pos, imsi, plmn_len);
 559         pos += plmn_len;
 560         os_memcpy(pos, msin, msin_len);
 561         pos += msin_len;
 562         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 563         if (plmn_len == 5) {
 564                 *pos++ = '0';
 565                 *pos++ = imsi[3];
 566                 *pos++ = imsi[4];
 567         } else {
 568                 *pos++ = imsi[3];
 569                 *pos++ = imsi[4];
 570                 *pos++ = imsi[5];
 571         }
 572         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 573                            imsi[0], imsi[1], imsi[2]);
 574
 575         return 0;
 576 }
 577
 578
 579 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 580 {
 581         char nai[100];
 582         if (build_root_nai(nai, sizeof(nai), imsi, prefix) < 0)
 583                 return -1;
 584         return wpa_config_set_quoted(ssid, "identity", nai);
 585 }
 586
 587 #endif /* INTERWORKING_3GPP */
 588
 589
 590 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 591                                      struct wpa_bss *bss)
 592 {
 593 #ifdef INTERWORKING_3GPP
 594         struct wpa_cred *cred;
 595         struct wpa_ssid *ssid;
 596         const u8 *ie;
 597
 598         if (bss->anqp_3gpp == NULL)
 599                 return -1;
 600
 601         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 602                 char *sep;
 603                 const char *imsi;
 604                 int mnc_len;
 605
 606 #ifdef PCSC_FUNCS
 607                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
 608                     wpa_s->imsi[0]) {
 609                         imsi = wpa_s->imsi;
 610                         mnc_len = wpa_s->mnc_len;
 611                         goto compare;
 612                 }
 613 #endif /* PCSC_FUNCS */
 614
 615                 if (cred->imsi == NULL || !cred->imsi[0] ||
 616                     cred->milenage == NULL || !cred->milenage[0])
 617                         continue;
 618
 619                 sep = os_strchr(cred->imsi, '-');
 620                 if (sep == NULL ||
 621                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
 622                         continue;
 623                 mnc_len = sep - cred->imsi - 3;
 624                 imsi = cred->imsi;
 625
 626 #ifdef PCSC_FUNCS
 627         compare:
 628 #endif /* PCSC_FUNCS */
 629                 if (plmn_id_match(bss->anqp_3gpp, imsi, mnc_len))
 630                         break;
 631         }
 632         if (cred == NULL)
 633                 return -1;
 634
 635         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 636         if (ie == NULL)
 637                 return -1;
 638         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 639                    MAC2STR(bss->bssid));
 640
 641         ssid = wpa_config_add_network(wpa_s->conf);
 642         if (ssid == NULL)
 643                 return -1;
 644
 645         wpas_notify_network_added(wpa_s, ssid);
 646         wpa_config_set_network_defaults(ssid);
 647         ssid->priority = cred->priority;
 648         ssid->temporary = 1;
 649         ssid->ssid = os_zalloc(ie[1] + 1);
 650         if (ssid->ssid == NULL)
 651                 goto fail;
 652         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 653         ssid->ssid_len = ie[1];
 654
 655         /* TODO: figure out whether to use EAP-SIM, EAP-AKA, or EAP-AKA' */
 656         if (wpa_config_set(ssid, "eap", "SIM", 0) < 0) {
 657                 wpa_printf(MSG_DEBUG, "EAP-SIM not supported");
 658                 goto fail;
 659         }
 660         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 661                 wpa_config_set(ssid, "eap", "AKA", 0);
 662         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, '1') < 0) {
 663                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 664                 goto fail;
 665         }
 666
 667         if (cred->milenage && cred->milenage[0]) {
 668                 if (wpa_config_set_quoted(ssid, "password",
 669                                           cred->milenage) < 0)
 670                         goto fail;
 671         } else if (cred->pcsc) {
 672                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 673                         goto fail;
 674                 if (wpa_s->conf->pcsc_pin &&
 675                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 676                     < 0)
 677                         goto fail;
 678         }
 679
 680         if (cred->password && cred->password[0] &&
 681             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 682                 goto fail;
 683
 684         wpa_config_update_prio_list(wpa_s->conf);
 685         wpa_s->disconnected = 0;
 686         wpa_s->reassociate = 1;
 687         wpa_supplicant_req_scan(wpa_s, 0, 0);
 688
 689         return 0;
 690
 691 fail:
 692         wpas_notify_network_removed(wpa_s, ssid);
 693         wpa_config_remove_network(wpa_s->conf, ssid->id);
 694 #endif /* INTERWORKING_3GPP */
 695         return -1;
 696 }
 697
 698
 699 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 700 {
 701         struct wpa_cred *cred;
 702         struct wpa_ssid *ssid;
 703         struct nai_realm *realm;
 704         struct nai_realm_eap *eap = NULL;
 705         u16 count, i;
 706         char buf[100];
 707         const u8 *ie;
 708
 709         if (wpa_s->conf->cred == NULL || bss == NULL)
 710                 return -1;
 711         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 712         if (ie == NULL || ie[1] == 0) {
 713                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
 714                            MACSTR, MAC2STR(bss->bssid));
 715                 return -1;
 716         }
 717
 718         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
 719         if (realm == NULL) {
 720                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
 721                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
 722                 count = 0;
 723         }
 724
 725         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 726                 for (i = 0; i < count; i++) {
 727                         if (!nai_realm_match(&realm[i], cred->realm))
 728                                 continue;
 729                         eap = nai_realm_find_eap(cred, &realm[i]);
 730                         if (eap)
 731                                 break;
 732                 }
 733                 if (eap)
 734                         break;
 735         }
 736
 737         if (!eap) {
 738                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
 739                         if (realm)
 740                                 nai_realm_free(realm, count);
 741                         return 0;
 742                 }
 743
 744                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
 745                            "and EAP method found for " MACSTR,
 746                            MAC2STR(bss->bssid));
 747                 nai_realm_free(realm, count);
 748                 return -1;
 749         }
 750
 751         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
 752                    MAC2STR(bss->bssid));
 753
 754         ssid = wpa_config_add_network(wpa_s->conf);
 755         if (ssid == NULL) {
 756                 nai_realm_free(realm, count);
 757                 return -1;
 758         }
 759         wpas_notify_network_added(wpa_s, ssid);
 760         wpa_config_set_network_defaults(ssid);
 761         ssid->priority = cred->priority;
 762         ssid->temporary = 1;
 763         ssid->ssid = os_zalloc(ie[1] + 1);
 764         if (ssid->ssid == NULL)
 765                 goto fail;
 766         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 767         ssid->ssid_len = ie[1];
 768
 769         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
 770                                                      eap->method), 0) < 0)
 771                 goto fail;
 772
 773         if (eap->method == EAP_TYPE_TTLS &&
 774             cred->username && cred->username[0]) {
 775                 const char *pos;
 776                 char *anon;
 777                 /* Use anonymous NAI in Phase 1 */
 778                 pos = os_strchr(cred->username, '@');
 779                 if (pos) {
 780                         size_t buflen = 9 + os_strlen(pos) + 1;
 781                         anon = os_malloc(buflen);
 782                         if (anon == NULL)
 783                                 goto fail;
 784                         os_snprintf(anon, buflen, "anonymous%s", pos);
 785                 } else {
 786                         anon = os_strdup("anonymous");
 787                         if (anon == NULL)
 788                                 goto fail;
 789                 }
 790                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
 791                     0) {
 792                         os_free(anon);
 793                         goto fail;
 794                 }
 795                 os_free(anon);
 796         }
 797
 798         if (cred->username && cred->username[0] &&
 799             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
 800                 goto fail;
 801
 802         if (cred->password && cred->password[0] &&
 803             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 804                 goto fail;
 805
 806         if (cred->client_cert && cred->client_cert[0] &&
 807             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
 808                 goto fail;
 809
 810         if (cred->private_key && cred->private_key[0] &&
 811             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
 812                 goto fail;
 813
 814         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
 815             wpa_config_set_quoted(ssid, "private_key_passwd",
 816                                   cred->private_key_passwd) < 0)
 817                 goto fail;
 818
 819         switch (eap->method) {
 820         case EAP_TYPE_TTLS:
 821                 if (eap->inner_method) {
 822                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
 823                                     eap_get_name(EAP_VENDOR_IETF,
 824                                                  eap->inner_method));
 825                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
 826                                 goto fail;
 827                         break;
 828                 }
 829                 switch (eap->inner_non_eap) {
 830                 case NAI_REALM_INNER_NON_EAP_PAP:
 831                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
 832                             0)
 833                                 goto fail;
 834                         break;
 835                 case NAI_REALM_INNER_NON_EAP_CHAP:
 836                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
 837                             < 0)
 838                                 goto fail;
 839                         break;
 840                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
 841                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
 842                                            0) < 0)
 843                                 goto fail;
 844                         break;
 845                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 846                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
 847                                            0) < 0)
 848                                 goto fail;
 849                         break;
 850                 }
 851                 break;
 852         case EAP_TYPE_PEAP:
 853                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
 854                             eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
 855                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
 856                         goto fail;
 857                 break;
 858         case EAP_TYPE_TLS:
 859                 break;
 860         }
 861
 862         if (cred->ca_cert && cred->ca_cert[0] &&
 863             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
 864                 goto fail;
 865
 866         nai_realm_free(realm, count);
 867
 868         wpa_config_update_prio_list(wpa_s->conf);
 869         wpa_s->disconnected = 0;
 870         wpa_s->reassociate = 1;
 871         wpa_supplicant_req_scan(wpa_s, 0, 0);
 872
 873         return 0;
 874
 875 fail:
 876         wpas_notify_network_removed(wpa_s, ssid);
 877         wpa_config_remove_network(wpa_s->conf, ssid->id);
 878         nai_realm_free(realm, count);
 879         return -1;
 880 }
 881
 882
 883 static struct wpa_cred * interworking_credentials_available_3gpp(
 884         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 885 {
 886         struct wpa_cred *cred, *selected = NULL;
 887         int ret;
 888
 889 #ifdef INTERWORKING_3GPP
 890         if (bss->anqp_3gpp == NULL)
 891                 return NULL;
 892
 893         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 894                 char *sep;
 895                 const char *imsi;
 896                 int mnc_len;
 897
 898 #ifdef PCSC_FUNCS
 899                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
 900                     wpa_s->imsi[0]) {
 901                         imsi = wpa_s->imsi;
 902                         mnc_len = wpa_s->mnc_len;
 903                         goto compare;
 904                 }
 905 #endif /* PCSC_FUNCS */
 906
 907                 if (cred->imsi == NULL || !cred->imsi[0] ||
 908                     cred->milenage == NULL || !cred->milenage[0])
 909                         continue;
 910
 911                 sep = os_strchr(cred->imsi, '-');
 912                 if (sep == NULL ||
 913                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
 914                         continue;
 915                 mnc_len = sep - cred->imsi - 3;
 916                 imsi = cred->imsi;
 917
 918 #ifdef PCSC_FUNCS
 919         compare:
 920 #endif /* PCSC_FUNCS */
 921                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
 922                            MACSTR, MAC2STR(bss->bssid));
 923                 ret = plmn_id_match(bss->anqp_3gpp, imsi, mnc_len);
 924                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
 925                 if (ret) {
 926                         if (selected == NULL ||
 927                             selected->priority < cred->priority)
 928                                 selected = cred;
 929                 }
 930         }
 931 #endif /* INTERWORKING_3GPP */
 932         return selected;
 933 }
 934
 935
 936 static struct wpa_cred * interworking_credentials_available_realm(
 937         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 938 {
 939         struct wpa_cred *cred, *selected = NULL;
 940         struct nai_realm *realm;
 941         u16 count, i;
 942
 943         if (bss->anqp_nai_realm == NULL)
 944                 return NULL;
 945
 946         if (wpa_s->conf->cred == NULL)
 947                 return NULL;
 948
 949         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
 950                    MACSTR, MAC2STR(bss->bssid));
 951         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
 952         if (realm == NULL) {
 953                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
 954                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
 955                 return NULL;
 956         }
 957
 958         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 959                 if (cred->realm == NULL)
 960                         continue;
 961
 962                 for (i = 0; i < count; i++) {
 963                         if (!nai_realm_match(&realm[i], cred->realm))
 964                                 continue;
 965                         if (nai_realm_find_eap(cred, &realm[i])) {
 966                                 if (selected == NULL ||
 967                                     selected->priority < cred->priority)
 968                                         selected = cred;
 969                                 break;
 970                         }
 971                 }
 972         }
 973
 974         nai_realm_free(realm, count);
 975
 976         return selected;
 977 }
 978
 979
 980 static struct wpa_cred * interworking_credentials_available(
 981         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 982 {
 983         struct wpa_cred *cred, *cred2;
 984
 985         cred = interworking_credentials_available_realm(wpa_s, bss);
 986         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
 987         if (cred && cred2 && cred2->priority >= cred->priority)
 988                 cred = cred2;
 989         if (!cred)
 990                 cred = cred2;
 991
 992         return cred;
 993 }
 994
 995
 996 static int domain_name_list_contains(struct wpabuf *domain_names,
 997                                      const char *domain)
 998 {
 999         const u8 *pos, *end;
1000         size_t len;
1001
1002         len = os_strlen(domain);
1003         pos = wpabuf_head(domain_names);
1004         end = pos + wpabuf_len(domain_names);
1005
1006         while (pos + 1 < end) {
1007                 if (pos + 1 + pos[0] > end)
1008                         break;
1009
1010                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1011                                   pos + 1, pos[0]);
1012                 if (pos[0] == len &&
1013                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1014                         return 1;
1015
1016                 pos += 1 + pos[0];
1017         }
1018
1019         return 0;
1020 }
1021
1022
1023 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1024                                 struct wpabuf *domain_names)
1025 {
1026         struct wpa_cred *cred;
1027 #ifdef INTERWORKING_3GPP
1028         char nai[100], *realm;
1029 #endif /* INTERWORKING_3GPP */
1030
1031         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1032                 return -1;
1033
1034         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1035 #ifdef INTERWORKING_3GPP
1036                 if (cred->imsi &&
1037                     build_root_nai(nai, sizeof(nai), cred->imsi, 0) == 0) {
1038                         realm = os_strchr(nai, '@');
1039                         if (realm)
1040                                 realm++;
1041                         wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1042                                    "with SIM/USIM domain %s", realm);
1043                         if (realm &&
1044                             domain_name_list_contains(domain_names, realm))
1045                                 return 1;
1046                 }
1047 #endif /* INTERWORKING_3GPP */
1048
1049                 if (cred->domain == NULL)
1050                         continue;
1051
1052                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1053                            "home SP FQDN %s", cred->domain);
1054                 if (domain_name_list_contains(domain_names, cred->domain))
1055                         return 1;
1056         }
1057
1058         return 0;
1059 }
1060
1061
1062 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1063 {
1064         struct wpa_bss *bss;
1065         struct wpa_ssid *ssid;
1066
1067         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1068                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1069                         if (ssid->disabled || ssid->mode != WPAS_MODE_INFRA)
1070                                 continue;
1071                         if (ssid->ssid_len != bss->ssid_len ||
1072                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1073                             0)
1074                                 continue;
1075                         /*
1076                          * TODO: Consider more accurate matching of security
1077                          * configuration similarly to what is done in events.c
1078                          */
1079                         return 1;
1080                 }
1081         }
1082
1083         return 0;
1084 }
1085
1086
1087 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1088 {
1089         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1090         int selected_prio = -999999, selected_home_prio = -999999;
1091         unsigned int count = 0;
1092         const char *type;
1093         int res;
1094         struct wpa_cred *cred;
1095
1096         wpa_s->network_select = 0;
1097
1098         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1099                 cred = interworking_credentials_available(wpa_s, bss);
1100                 if (!cred)
1101                         continue;
1102                 count++;
1103                 res = interworking_home_sp(wpa_s, bss->anqp_domain_name);
1104                 if (res > 0)
1105                         type = "home";
1106                 else if (res == 0)
1107                         type = "roaming";
1108                 else
1109                         type = "unknown";
1110                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1111                         MAC2STR(bss->bssid), type);
1112                 if (wpa_s->auto_select) {
1113                         if (selected == NULL ||
1114                             cred->priority > selected_prio) {
1115                                 selected = bss;
1116                                 selected_prio = cred->priority;
1117                         }
1118                         if (res > 0 &&
1119                             (selected_home == NULL ||
1120                              cred->priority > selected_home_prio)) {
1121                                 selected_home = bss;
1122                                 selected_home_prio = cred->priority;
1123                         }
1124                 }
1125         }
1126
1127         if (selected_home && selected_home != selected &&
1128             selected_home_prio >= selected_prio) {
1129                 /* Prefer network operated by the Home SP */
1130                 selected = selected_home;
1131         }
1132
1133         if (count == 0) {
1134                 /*
1135                  * No matching network was found based on configured
1136                  * credentials. Check whether any of the enabled network blocks
1137                  * have matching APs.
1138                  */
1139                 if (interworking_find_network_match(wpa_s)) {
1140                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1141                                    "match for enabled network configurations");
1142                         wpa_s->disconnected = 0;
1143                         wpa_s->reassociate = 1;
1144                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1145                         return;
1146                 }
1147
1148                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1149                         "with matching credentials found");
1150         }
1151
1152         if (selected)
1153                 interworking_connect(wpa_s, selected);
1154 }
1155
1156
1157 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1158 {
1159         struct wpa_bss *bss;
1160         int found = 0;
1161         const u8 *ie;
1162
1163         if (!wpa_s->fetch_anqp_in_progress)
1164                 return;
1165
1166         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1167                 if (!(bss->caps & IEEE80211_CAP_ESS))
1168                         continue;
1169                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1170                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1171                         continue; /* AP does not support Interworking */
1172
1173                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1174                         found++;
1175                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1176                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1177                                 MACSTR, MAC2STR(bss->bssid));
1178                         interworking_anqp_send_req(wpa_s, bss);
1179                         break;
1180                 }
1181         }
1182
1183         if (found == 0) {
1184                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1185                 wpa_s->fetch_anqp_in_progress = 0;
1186                 if (wpa_s->network_select)
1187                         interworking_select_network(wpa_s);
1188         }
1189 }
1190
1191
1192 static void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1193 {
1194         struct wpa_bss *bss;
1195
1196         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1197                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1198
1199         wpa_s->fetch_anqp_in_progress = 1;
1200         interworking_next_anqp_fetch(wpa_s);
1201 }
1202
1203
1204 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1205 {
1206         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1207                 return 0;
1208
1209         wpa_s->network_select = 0;
1210
1211         interworking_start_fetch_anqp(wpa_s);
1212
1213         return 0;
1214 }
1215
1216
1217 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1218 {
1219         if (!wpa_s->fetch_anqp_in_progress)
1220                 return;
1221
1222         wpa_s->fetch_anqp_in_progress = 0;
1223 }
1224
1225
1226 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1227                   u16 info_ids[], size_t num_ids)
1228 {
1229         struct wpabuf *buf;
1230         int ret = 0;
1231         int freq;
1232         struct wpa_bss *bss;
1233         int res;
1234
1235         freq = wpa_s->assoc_freq;
1236         bss = wpa_bss_get_bssid(wpa_s, dst);
1237         if (bss)
1238                 freq = bss->freq;
1239         if (freq <= 0)
1240                 return -1;
1241
1242         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1243                    MAC2STR(dst), (unsigned int) num_ids);
1244
1245         buf = anqp_build_req(info_ids, num_ids, NULL);
1246         if (buf == NULL)
1247                 return -1;
1248
1249         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1250         if (res < 0) {
1251                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1252                 ret = -1;
1253         } else
1254                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1255                            "%u", res);
1256
1257         wpabuf_free(buf);
1258         return ret;
1259 }
1260
1261
1262 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1263                                             const u8 *sa, u16 info_id,
1264                                             const u8 *data, size_t slen)
1265 {
1266         const u8 *pos = data;
1267         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1268
1269         switch (info_id) {
1270         case ANQP_CAPABILITY_LIST:
1271                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1272                         " ANQP Capability list", MAC2STR(sa));
1273                 break;
1274         case ANQP_VENUE_NAME:
1275                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1276                         " Venue Name", MAC2STR(sa));
1277                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1278                 if (bss) {
1279                         wpabuf_free(bss->anqp_venue_name);
1280                         bss->anqp_venue_name = wpabuf_alloc_copy(pos, slen);
1281                 }
1282                 break;
1283         case ANQP_NETWORK_AUTH_TYPE:
1284                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1285                         " Network Authentication Type information",
1286                         MAC2STR(sa));
1287                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1288                                   "Type", pos, slen);
1289                 if (bss) {
1290                         wpabuf_free(bss->anqp_network_auth_type);
1291                         bss->anqp_network_auth_type =
1292                                 wpabuf_alloc_copy(pos, slen);
1293                 }
1294                 break;
1295         case ANQP_ROAMING_CONSORTIUM:
1296                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1297                         " Roaming Consortium list", MAC2STR(sa));
1298                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1299                                   pos, slen);
1300                 if (bss) {
1301                         wpabuf_free(bss->anqp_roaming_consortium);
1302                         bss->anqp_roaming_consortium =
1303                                 wpabuf_alloc_copy(pos, slen);
1304                 }
1305                 break;
1306         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1307                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1308                         " IP Address Type Availability information",
1309                         MAC2STR(sa));
1310                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1311                             pos, slen);
1312                 if (bss) {
1313                         wpabuf_free(bss->anqp_ip_addr_type_availability);
1314                         bss->anqp_ip_addr_type_availability =
1315                                 wpabuf_alloc_copy(pos, slen);
1316                 }
1317                 break;
1318         case ANQP_NAI_REALM:
1319                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1320                         " NAI Realm list", MAC2STR(sa));
1321                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1322                 if (bss) {
1323                         wpabuf_free(bss->anqp_nai_realm);
1324                         bss->anqp_nai_realm = wpabuf_alloc_copy(pos, slen);
1325                 }
1326                 break;
1327         case ANQP_3GPP_CELLULAR_NETWORK:
1328                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1329                         " 3GPP Cellular Network information", MAC2STR(sa));
1330                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1331                                   pos, slen);
1332                 if (bss) {
1333                         wpabuf_free(bss->anqp_3gpp);
1334                         bss->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1335                 }
1336                 break;
1337         case ANQP_DOMAIN_NAME:
1338                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1339                         " Domain Name list", MAC2STR(sa));
1340                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1341                 if (bss) {
1342                         wpabuf_free(bss->anqp_domain_name);
1343                         bss->anqp_domain_name = wpabuf_alloc_copy(pos, slen);
1344                 }
1345                 break;
1346         case ANQP_VENDOR_SPECIFIC:
1347                 if (slen < 3)
1348                         return;
1349
1350                 switch (WPA_GET_BE24(pos)) {
1351                 default:
1352                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1353                                    "vendor-specific ANQP OUI %06x",
1354                                    WPA_GET_BE24(pos));
1355                         return;
1356                 }
1357                 break;
1358         default:
1359                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1360                            "%u", info_id);
1361                 break;
1362         }
1363 }
1364
1365
1366 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1367                   enum gas_query_result result,
1368                   const struct wpabuf *adv_proto,
1369                   const struct wpabuf *resp, u16 status_code)
1370 {
1371         struct wpa_supplicant *wpa_s = ctx;
1372         const u8 *pos;
1373         const u8 *end;
1374         u16 info_id;
1375         u16 slen;
1376
1377         if (result != GAS_QUERY_SUCCESS)
1378                 return;
1379
1380         pos = wpabuf_head(adv_proto);
1381         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1382             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1383                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1384                            "Protocol in response");
1385                 return;
1386         }
1387
1388         pos = wpabuf_head(resp);
1389         end = pos + wpabuf_len(resp);
1390
1391         while (pos < end) {
1392                 if (pos + 4 > end) {
1393                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1394                         break;
1395                 }
1396                 info_id = WPA_GET_LE16(pos);
1397                 pos += 2;
1398                 slen = WPA_GET_LE16(pos);
1399                 pos += 2;
1400                 if (pos + slen > end) {
1401                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1402                                    "for Info ID %u", info_id);
1403                         break;
1404                 }
1405                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1406                                                 slen);
1407                 pos += slen;
1408         }
1409 }
1410
1411
1412 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1413                                           struct wpa_scan_results *scan_res)
1414 {
1415         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1416                    "ANQP fetch");
1417         interworking_start_fetch_anqp(wpa_s);
1418 }
1419
1420
1421 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1422 {
1423         interworking_stop_fetch_anqp(wpa_s);
1424         wpa_s->network_select = 1;
1425         wpa_s->auto_select = !!auto_select;
1426         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
1427                    "selection");
1428         wpa_s->scan_res_handler = interworking_scan_res_handler;
1429         wpa_s->scan_req = 2;
1430         wpa_supplicant_req_scan(wpa_s, 0, 0);
1431
1432         return 0;
1433 }