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