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_connect_3gpp(struct wpa_supplicant *wpa_s,
 628                                      struct wpa_bss *bss)
 629 {
 630 #ifdef INTERWORKING_3GPP
 631         struct wpa_cred *cred;
 632         struct wpa_ssid *ssid;
 633         const u8 *ie;
 634
 635         if (bss->anqp_3gpp == NULL)
 636                 return -1;
 637
 638         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 639                 char *sep;
 640                 const char *imsi;
 641                 int mnc_len;
 642
 643 #ifdef PCSC_FUNCS
 644                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
 645                     wpa_s->imsi[0]) {
 646                         imsi = wpa_s->imsi;
 647                         mnc_len = wpa_s->mnc_len;
 648                         goto compare;
 649                 }
 650 #endif /* PCSC_FUNCS */
 651
 652                 if (cred->imsi == NULL || !cred->imsi[0] ||
 653                     cred->milenage == NULL || !cred->milenage[0])
 654                         continue;
 655
 656                 sep = os_strchr(cred->imsi, '-');
 657                 if (sep == NULL ||
 658                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
 659                         continue;
 660                 mnc_len = sep - cred->imsi - 3;
 661                 imsi = cred->imsi;
 662
 663 #ifdef PCSC_FUNCS
 664         compare:
 665 #endif /* PCSC_FUNCS */
 666                 if (plmn_id_match(bss->anqp_3gpp, imsi, mnc_len))
 667                         break;
 668         }
 669         if (cred == NULL)
 670                 return -1;
 671
 672         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 673         if (ie == NULL)
 674                 return -1;
 675         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 676                    MAC2STR(bss->bssid));
 677
 678         ssid = wpa_config_add_network(wpa_s->conf);
 679         if (ssid == NULL)
 680                 return -1;
 681
 682         wpas_notify_network_added(wpa_s, ssid);
 683         wpa_config_set_network_defaults(ssid);
 684         ssid->priority = cred->priority;
 685         ssid->temporary = 1;
 686         ssid->ssid = os_zalloc(ie[1] + 1);
 687         if (ssid->ssid == NULL)
 688                 goto fail;
 689         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 690         ssid->ssid_len = ie[1];
 691
 692         if (wpa_config_set(ssid, "key_mgmt", "WPA-EAP", 0) < 0)
 693                 goto fail;
 694
 695         /* TODO: figure out whether to use EAP-SIM, EAP-AKA, or EAP-AKA' */
 696         if (wpa_config_set(ssid, "eap", "SIM", 0) < 0) {
 697                 wpa_printf(MSG_DEBUG, "EAP-SIM not supported");
 698                 goto fail;
 699         }
 700         if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
 701                 wpa_config_set(ssid, "eap", "AKA", 0);
 702         if (!cred->pcsc && set_root_nai(ssid, cred->imsi, '1') < 0) {
 703                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 704                 goto fail;
 705         }
 706
 707         if (cred->milenage && cred->milenage[0]) {
 708                 if (wpa_config_set_quoted(ssid, "password",
 709                                           cred->milenage) < 0)
 710                         goto fail;
 711         } else if (cred->pcsc) {
 712                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 713                         goto fail;
 714                 if (wpa_s->conf->pcsc_pin &&
 715                     wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
 716                     < 0)
 717                         goto fail;
 718         }
 719
 720         if (cred->password && cred->password[0] &&
 721             wpa_config_set_quoted(ssid, "password", cred->password) < 0)
 722                 goto fail;
 723
 724         wpa_config_update_prio_list(wpa_s->conf);
 725         interworking_reconnect(wpa_s);
 726
 727         return 0;
 728
 729 fail:
 730         wpas_notify_network_removed(wpa_s, ssid);
 731         wpa_config_remove_network(wpa_s->conf, ssid->id);
 732 #endif /* INTERWORKING_3GPP */
 733         return -1;
 734 }
 735
 736
 737 static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
 738                                             size_t rc_len)
 739 {
 740         const u8 *pos, *end;
 741         u8 lens;
 742
 743         if (ie == NULL)
 744                 return 0;
 745
 746         pos = ie + 2;
 747         end = ie + 2 + ie[1];
 748
 749         /* Roaming Consortium element:
 750          * Number of ANQP OIs
 751          * OI #1 and #2 lengths
 752          * OI #1, [OI #2], [OI #3]
 753          */
 754
 755         if (pos + 2 > end)
 756                 return 0;
 757
 758         pos++; /* skip Number of ANQP OIs */
 759         lens = *pos++;
 760         if (pos + (lens & 0x0f) + (lens >> 4) > end)
 761                 return 0;
 762
 763         if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 764                 return 1;
 765         pos += lens & 0x0f;
 766
 767         if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 768                 return 1;
 769         pos += lens >> 4;
 770
 771         if (pos < end && (size_t) (end - pos) == rc_len &&
 772             os_memcmp(pos, rc_id, rc_len) == 0)
 773                 return 1;
 774
 775         return 0;
 776 }
 777
 778
 779 static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
 780                                          const u8 *rc_id, size_t rc_len)
 781 {
 782         const u8 *pos, *end;
 783         u8 len;
 784
 785         if (anqp == NULL)
 786                 return 0;
 787
 788         pos = wpabuf_head(anqp);
 789         end = pos + wpabuf_len(anqp);
 790
 791         /* Set of <OI Length, OI> duples */
 792         while (pos < end) {
 793                 len = *pos++;
 794                 if (pos + len > end)
 795                         break;
 796                 if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
 797                         return 1;
 798                 pos += len;
 799         }
 800
 801         return 0;
 802 }
 803
 804
 805 static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
 806                                     const u8 *rc_id, size_t rc_len)
 807 {
 808         return roaming_consortium_element_match(ie, rc_id, rc_len) ||
 809                 roaming_consortium_anqp_match(anqp, rc_id, rc_len);
 810 }
 811
 812
 813 static struct wpa_cred * interworking_credentials_available_roaming_consortium(
 814         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 815 {
 816         struct wpa_cred *cred, *selected = NULL;
 817         const u8 *ie;
 818
 819         ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
 820
 821         if (ie == NULL && bss->anqp_roaming_consortium == NULL)
 822                 return NULL;
 823
 824         if (wpa_s->conf->cred == NULL)
 825                 return NULL;
 826
 827         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 828                 if (cred->roaming_consortium_len == 0)
 829                         continue;
 830
 831                 if (!roaming_consortium_match(ie, bss->anqp_roaming_consortium,
 832                                               cred->roaming_consortium,
 833                                               cred->roaming_consortium_len))
 834                         continue;
 835
 836                 if (selected == NULL ||
 837                     selected->priority < cred->priority)
 838                         selected = cred;
 839         }
 840
 841         return selected;
 842 }
 843
 844
 845 static int interworking_set_eap_params(struct wpa_ssid *ssid,
 846                                        struct wpa_cred *cred, int ttls)
 847 {
 848         if (cred->eap_method) {
 849                 ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
 850                         cred->eap_method->method == EAP_TYPE_TTLS;
 851
 852                 os_free(ssid->eap.eap_methods);
 853                 ssid->eap.eap_methods =
 854                         os_malloc(sizeof(struct eap_method_type) * 2);
 855                 if (ssid->eap.eap_methods == NULL)
 856                         return -1;
 857                 os_memcpy(ssid->eap.eap_methods, cred->eap_method,
 858                           sizeof(*cred->eap_method));
 859                 ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
 860                 ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
 861         }
 862
 863         if (ttls && cred->username && cred->username[0]) {
 864                 const char *pos;
 865                 char *anon;
 866                 /* Use anonymous NAI in Phase 1 */
 867                 pos = os_strchr(cred->username, '@');
 868                 if (pos) {
 869                         size_t buflen = 9 + os_strlen(pos) + 1;
 870                         anon = os_malloc(buflen);
 871                         if (anon == NULL)
 872                                 return -1;
 873                         os_snprintf(anon, buflen, "anonymous%s", pos);
 874                 } else if (cred->realm) {
 875                         size_t buflen = 10 + os_strlen(cred->realm) + 1;
 876                         anon = os_malloc(buflen);
 877                         if (anon == NULL)
 878                                 return -1;
 879                         os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
 880                 } else {
 881                         anon = os_strdup("anonymous");
 882                         if (anon == NULL)
 883                                 return -1;
 884                 }
 885                 if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
 886                     0) {
 887                         os_free(anon);
 888                         return -1;
 889                 }
 890                 os_free(anon);
 891         }
 892
 893         if (cred->username && cred->username[0] &&
 894             wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
 895                 return -1;
 896
 897         if (cred->password && cred->password[0]) {
 898                 if (cred->ext_password &&
 899                     wpa_config_set(ssid, "password", cred->password, 0) < 0)
 900                         return -1;
 901                 if (!cred->ext_password &&
 902                     wpa_config_set_quoted(ssid, "password", cred->password) <
 903                     0)
 904                         return -1;
 905         }
 906
 907         if (cred->client_cert && cred->client_cert[0] &&
 908             wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
 909                 return -1;
 910
 911         if (cred->private_key && cred->private_key[0] &&
 912             wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
 913                 return -1;
 914
 915         if (cred->private_key_passwd && cred->private_key_passwd[0] &&
 916             wpa_config_set_quoted(ssid, "private_key_passwd",
 917                                   cred->private_key_passwd) < 0)
 918                 return -1;
 919
 920         if (cred->phase1) {
 921                 os_free(ssid->eap.phase1);
 922                 ssid->eap.phase1 = os_strdup(cred->phase1);
 923         }
 924         if (cred->phase2) {
 925                 os_free(ssid->eap.phase2);
 926                 ssid->eap.phase2 = os_strdup(cred->phase2);
 927         }
 928
 929         if (cred->ca_cert && cred->ca_cert[0] &&
 930             wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
 931                 return -1;
 932
 933         return 0;
 934 }
 935
 936
 937 static int interworking_connect_roaming_consortium(
 938         struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
 939         struct wpa_bss *bss, const u8 *ssid_ie)
 940 {
 941         struct wpa_ssid *ssid;
 942
 943         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
 944                    "roaming consortium match", MAC2STR(bss->bssid));
 945
 946         ssid = wpa_config_add_network(wpa_s->conf);
 947         if (ssid == NULL)
 948                 return -1;
 949         wpas_notify_network_added(wpa_s, ssid);
 950         wpa_config_set_network_defaults(ssid);
 951         ssid->priority = cred->priority;
 952         ssid->temporary = 1;
 953         ssid->ssid = os_zalloc(ssid_ie[1] + 1);
 954         if (ssid->ssid == NULL)
 955                 goto fail;
 956         os_memcpy(ssid->ssid, ssid_ie + 2, ssid_ie[1]);
 957         ssid->ssid_len = ssid_ie[1];
 958
 959         if (wpa_config_set(ssid, "key_mgmt", "WPA-EAP", 0) < 0)
 960                 goto fail;
 961
 962         if (cred->eap_method == NULL) {
 963                 wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
 964                            "credential using roaming consortium");
 965                 goto fail;
 966         }
 967
 968         if (interworking_set_eap_params(
 969                     ssid, cred,
 970                     cred->eap_method->vendor == EAP_VENDOR_IETF &&
 971                     cred->eap_method->method == EAP_TYPE_TTLS) < 0)
 972                 goto fail;
 973
 974         wpa_config_update_prio_list(wpa_s->conf);
 975         interworking_reconnect(wpa_s);
 976
 977         return 0;
 978
 979 fail:
 980         wpas_notify_network_removed(wpa_s, ssid);
 981         wpa_config_remove_network(wpa_s->conf, ssid->id);
 982         return -1;
 983 }
 984
 985
 986 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 987 {
 988         struct wpa_cred *cred;
 989         struct wpa_ssid *ssid;
 990         struct nai_realm *realm;
 991         struct nai_realm_eap *eap = NULL;
 992         u16 count, i;
 993         char buf[100];
 994         const u8 *ie;
 995
 996         if (wpa_s->conf->cred == NULL || bss == NULL)
 997                 return -1;
 998         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 999         if (ie == NULL || ie[1] == 0) {
1000                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
1001                            MACSTR, MAC2STR(bss->bssid));
1002                 return -1;
1003         }
1004
1005         cred = interworking_credentials_available_roaming_consortium(wpa_s,
1006                                                                      bss);
1007         if (cred)
1008                 return interworking_connect_roaming_consortium(wpa_s, cred,
1009                                                                bss, ie);
1010
1011         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
1012         if (realm == NULL) {
1013                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1014                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1015                 count = 0;
1016         }
1017
1018         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1019                 for (i = 0; i < count; i++) {
1020                         if (!nai_realm_match(&realm[i], cred->realm))
1021                                 continue;
1022                         eap = nai_realm_find_eap(cred, &realm[i]);
1023                         if (eap)
1024                                 break;
1025                 }
1026                 if (eap)
1027                         break;
1028         }
1029
1030         if (!eap) {
1031                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
1032                         if (realm)
1033                                 nai_realm_free(realm, count);
1034                         return 0;
1035                 }
1036
1037                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
1038                            "and EAP method found for " MACSTR,
1039                            MAC2STR(bss->bssid));
1040                 nai_realm_free(realm, count);
1041                 return -1;
1042         }
1043
1044         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
1045                    MAC2STR(bss->bssid));
1046
1047         ssid = wpa_config_add_network(wpa_s->conf);
1048         if (ssid == NULL) {
1049                 nai_realm_free(realm, count);
1050                 return -1;
1051         }
1052         wpas_notify_network_added(wpa_s, ssid);
1053         wpa_config_set_network_defaults(ssid);
1054         ssid->priority = cred->priority;
1055         ssid->temporary = 1;
1056         ssid->ssid = os_zalloc(ie[1] + 1);
1057         if (ssid->ssid == NULL)
1058                 goto fail;
1059         os_memcpy(ssid->ssid, ie + 2, ie[1]);
1060         ssid->ssid_len = ie[1];
1061
1062         if (wpa_config_set(ssid, "key_mgmt", "WPA-EAP", 0) < 0)
1063                 goto fail;
1064
1065         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
1066                                                      eap->method), 0) < 0)
1067                 goto fail;
1068
1069         switch (eap->method) {
1070         case EAP_TYPE_TTLS:
1071                 if (eap->inner_method) {
1072                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
1073                                     eap_get_name(EAP_VENDOR_IETF,
1074                                                  eap->inner_method));
1075                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1076                                 goto fail;
1077                         break;
1078                 }
1079                 switch (eap->inner_non_eap) {
1080                 case NAI_REALM_INNER_NON_EAP_PAP:
1081                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
1082                             0)
1083                                 goto fail;
1084                         break;
1085                 case NAI_REALM_INNER_NON_EAP_CHAP:
1086                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
1087                             < 0)
1088                                 goto fail;
1089                         break;
1090                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
1091                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
1092                                            0) < 0)
1093                                 goto fail;
1094                         break;
1095                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
1096                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
1097                                            0) < 0)
1098                                 goto fail;
1099                         break;
1100                 }
1101                 break;
1102         case EAP_TYPE_PEAP:
1103                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
1104                             eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
1105                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
1106                         goto fail;
1107                 break;
1108         case EAP_TYPE_TLS:
1109                 break;
1110         }
1111
1112         if (interworking_set_eap_params(ssid, cred,
1113                                         eap->method == EAP_TYPE_TTLS) < 0)
1114                 goto fail;
1115
1116         nai_realm_free(realm, count);
1117
1118         wpa_config_update_prio_list(wpa_s->conf);
1119         interworking_reconnect(wpa_s);
1120
1121         return 0;
1122
1123 fail:
1124         wpas_notify_network_removed(wpa_s, ssid);
1125         wpa_config_remove_network(wpa_s->conf, ssid->id);
1126         nai_realm_free(realm, count);
1127         return -1;
1128 }
1129
1130
1131 static struct wpa_cred * interworking_credentials_available_3gpp(
1132         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1133 {
1134         struct wpa_cred *cred, *selected = NULL;
1135         int ret;
1136
1137 #ifdef INTERWORKING_3GPP
1138         if (bss->anqp_3gpp == NULL)
1139                 return NULL;
1140
1141         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1142                 char *sep;
1143                 const char *imsi;
1144                 int mnc_len;
1145
1146 #ifdef PCSC_FUNCS
1147                 if (cred->pcsc && wpa_s->conf->pcsc_reader && wpa_s->scard &&
1148                     wpa_s->imsi[0]) {
1149                         imsi = wpa_s->imsi;
1150                         mnc_len = wpa_s->mnc_len;
1151                         goto compare;
1152                 }
1153 #endif /* PCSC_FUNCS */
1154
1155                 if (cred->imsi == NULL || !cred->imsi[0] ||
1156                     cred->milenage == NULL || !cred->milenage[0])
1157                         continue;
1158
1159                 sep = os_strchr(cred->imsi, '-');
1160                 if (sep == NULL ||
1161                     (sep - cred->imsi != 5 && sep - cred->imsi != 6))
1162                         continue;
1163                 mnc_len = sep - cred->imsi - 3;
1164                 imsi = cred->imsi;
1165
1166 #ifdef PCSC_FUNCS
1167         compare:
1168 #endif /* PCSC_FUNCS */
1169                 wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
1170                            MACSTR, MAC2STR(bss->bssid));
1171                 ret = plmn_id_match(bss->anqp_3gpp, imsi, mnc_len);
1172                 wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
1173                 if (ret) {
1174                         if (selected == NULL ||
1175                             selected->priority < cred->priority)
1176                                 selected = cred;
1177                 }
1178         }
1179 #endif /* INTERWORKING_3GPP */
1180         return selected;
1181 }
1182
1183
1184 static struct wpa_cred * interworking_credentials_available_realm(
1185         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1186 {
1187         struct wpa_cred *cred, *selected = NULL;
1188         struct nai_realm *realm;
1189         u16 count, i;
1190
1191         if (bss->anqp_nai_realm == NULL)
1192                 return NULL;
1193
1194         if (wpa_s->conf->cred == NULL)
1195                 return NULL;
1196
1197         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
1198                    MACSTR, MAC2STR(bss->bssid));
1199         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
1200         if (realm == NULL) {
1201                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
1202                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
1203                 return NULL;
1204         }
1205
1206         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1207                 if (cred->realm == NULL)
1208                         continue;
1209
1210                 for (i = 0; i < count; i++) {
1211                         if (!nai_realm_match(&realm[i], cred->realm))
1212                                 continue;
1213                         if (nai_realm_find_eap(cred, &realm[i])) {
1214                                 if (selected == NULL ||
1215                                     selected->priority < cred->priority)
1216                                         selected = cred;
1217                                 break;
1218                         }
1219                 }
1220         }
1221
1222         nai_realm_free(realm, count);
1223
1224         return selected;
1225 }
1226
1227
1228 static struct wpa_cred * interworking_credentials_available(
1229         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
1230 {
1231         struct wpa_cred *cred, *cred2;
1232
1233         cred = interworking_credentials_available_realm(wpa_s, bss);
1234         cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
1235         if (cred && cred2 && cred2->priority >= cred->priority)
1236                 cred = cred2;
1237         if (!cred)
1238                 cred = cred2;
1239
1240         cred2 = interworking_credentials_available_roaming_consortium(wpa_s,
1241                                                                       bss);
1242         if (cred && cred2 && cred2->priority >= cred->priority)
1243                 cred = cred2;
1244         if (!cred)
1245                 cred = cred2;
1246
1247         return cred;
1248 }
1249
1250
1251 static int domain_name_list_contains(struct wpabuf *domain_names,
1252                                      const char *domain)
1253 {
1254         const u8 *pos, *end;
1255         size_t len;
1256
1257         len = os_strlen(domain);
1258         pos = wpabuf_head(domain_names);
1259         end = pos + wpabuf_len(domain_names);
1260
1261         while (pos + 1 < end) {
1262                 if (pos + 1 + pos[0] > end)
1263                         break;
1264
1265                 wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
1266                                   pos + 1, pos[0]);
1267                 if (pos[0] == len &&
1268                     os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
1269                         return 1;
1270
1271                 pos += 1 + pos[0];
1272         }
1273
1274         return 0;
1275 }
1276
1277
1278 static int interworking_home_sp(struct wpa_supplicant *wpa_s,
1279                                 struct wpabuf *domain_names)
1280 {
1281         struct wpa_cred *cred;
1282 #ifdef INTERWORKING_3GPP
1283         char nai[100], *realm;
1284 #endif /* INTERWORKING_3GPP */
1285
1286         if (domain_names == NULL || wpa_s->conf->cred == NULL)
1287                 return -1;
1288
1289         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
1290 #ifdef INTERWORKING_3GPP
1291                 if (cred->imsi &&
1292                     build_root_nai(nai, sizeof(nai), cred->imsi, 0) == 0) {
1293                         realm = os_strchr(nai, '@');
1294                         if (realm)
1295                                 realm++;
1296                         wpa_printf(MSG_DEBUG, "Interworking: Search for match "
1297                                    "with SIM/USIM domain %s", realm);
1298                         if (realm &&
1299                             domain_name_list_contains(domain_names, realm))
1300                                 return 1;
1301                 }
1302 #endif /* INTERWORKING_3GPP */
1303
1304                 if (cred->domain == NULL)
1305                         continue;
1306
1307                 wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
1308                            "home SP FQDN %s", cred->domain);
1309                 if (domain_name_list_contains(domain_names, cred->domain))
1310                         return 1;
1311         }
1312
1313         return 0;
1314 }
1315
1316
1317 static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
1318 {
1319         struct wpa_bss *bss;
1320         struct wpa_ssid *ssid;
1321
1322         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1323                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1324                         if (wpas_network_disabled(wpa_s, ssid) ||
1325                             ssid->mode != WPAS_MODE_INFRA)
1326                                 continue;
1327                         if (ssid->ssid_len != bss->ssid_len ||
1328                             os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
1329                             0)
1330                                 continue;
1331                         /*
1332                          * TODO: Consider more accurate matching of security
1333                          * configuration similarly to what is done in events.c
1334                          */
1335                         return 1;
1336                 }
1337         }
1338
1339         return 0;
1340 }
1341
1342
1343 static void interworking_select_network(struct wpa_supplicant *wpa_s)
1344 {
1345         struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
1346         int selected_prio = -999999, selected_home_prio = -999999;
1347         unsigned int count = 0;
1348         const char *type;
1349         int res;
1350         struct wpa_cred *cred;
1351
1352         wpa_s->network_select = 0;
1353
1354         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1355                 cred = interworking_credentials_available(wpa_s, bss);
1356                 if (!cred)
1357                         continue;
1358                 count++;
1359                 res = interworking_home_sp(wpa_s, bss->anqp_domain_name);
1360                 if (res > 0)
1361                         type = "home";
1362                 else if (res == 0)
1363                         type = "roaming";
1364                 else
1365                         type = "unknown";
1366                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
1367                         MAC2STR(bss->bssid), type);
1368                 if (wpa_s->auto_select) {
1369                         if (selected == NULL ||
1370                             cred->priority > selected_prio) {
1371                                 selected = bss;
1372                                 selected_prio = cred->priority;
1373                         }
1374                         if (res > 0 &&
1375                             (selected_home == NULL ||
1376                              cred->priority > selected_home_prio)) {
1377                                 selected_home = bss;
1378                                 selected_home_prio = cred->priority;
1379                         }
1380                 }
1381         }
1382
1383         if (selected_home && selected_home != selected &&
1384             selected_home_prio >= selected_prio) {
1385                 /* Prefer network operated by the Home SP */
1386                 selected = selected_home;
1387         }
1388
1389         if (count == 0) {
1390                 /*
1391                  * No matching network was found based on configured
1392                  * credentials. Check whether any of the enabled network blocks
1393                  * have matching APs.
1394                  */
1395                 if (interworking_find_network_match(wpa_s)) {
1396                         wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
1397                                    "match for enabled network configurations");
1398                         if (wpa_s->auto_select)
1399                                 interworking_reconnect(wpa_s);
1400                         return;
1401                 }
1402
1403                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
1404                         "with matching credentials found");
1405         }
1406
1407         if (selected)
1408                 interworking_connect(wpa_s, selected);
1409 }
1410
1411
1412 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
1413 {
1414         struct wpa_bss *bss;
1415         int found = 0;
1416         const u8 *ie;
1417
1418         if (!wpa_s->fetch_anqp_in_progress)
1419                 return;
1420
1421         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1422                 if (!(bss->caps & IEEE80211_CAP_ESS))
1423                         continue;
1424                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
1425                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
1426                         continue; /* AP does not support Interworking */
1427
1428                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
1429                         found++;
1430                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
1431                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
1432                                 MACSTR, MAC2STR(bss->bssid));
1433                         interworking_anqp_send_req(wpa_s, bss);
1434                         break;
1435                 }
1436         }
1437
1438         if (found == 0) {
1439                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
1440                 wpa_s->fetch_anqp_in_progress = 0;
1441                 if (wpa_s->network_select)
1442                         interworking_select_network(wpa_s);
1443         }
1444 }
1445
1446
1447 static void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
1448 {
1449         struct wpa_bss *bss;
1450
1451         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
1452                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
1453
1454         wpa_s->fetch_anqp_in_progress = 1;
1455         interworking_next_anqp_fetch(wpa_s);
1456 }
1457
1458
1459 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
1460 {
1461         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
1462                 return 0;
1463
1464         wpa_s->network_select = 0;
1465
1466         interworking_start_fetch_anqp(wpa_s);
1467
1468         return 0;
1469 }
1470
1471
1472 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
1473 {
1474         if (!wpa_s->fetch_anqp_in_progress)
1475                 return;
1476
1477         wpa_s->fetch_anqp_in_progress = 0;
1478 }
1479
1480
1481 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
1482                   u16 info_ids[], size_t num_ids)
1483 {
1484         struct wpabuf *buf;
1485         int ret = 0;
1486         int freq;
1487         struct wpa_bss *bss;
1488         int res;
1489
1490         freq = wpa_s->assoc_freq;
1491         bss = wpa_bss_get_bssid(wpa_s, dst);
1492         if (bss)
1493                 freq = bss->freq;
1494         if (freq <= 0)
1495                 return -1;
1496
1497         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
1498                    MAC2STR(dst), (unsigned int) num_ids);
1499
1500         buf = anqp_build_req(info_ids, num_ids, NULL);
1501         if (buf == NULL)
1502                 return -1;
1503
1504         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
1505         if (res < 0) {
1506                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
1507                 ret = -1;
1508         } else
1509                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
1510                            "%u", res);
1511
1512         wpabuf_free(buf);
1513         return ret;
1514 }
1515
1516
1517 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
1518                                             const u8 *sa, u16 info_id,
1519                                             const u8 *data, size_t slen)
1520 {
1521         const u8 *pos = data;
1522         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
1523 #ifdef CONFIG_HS20
1524         u8 type;
1525 #endif /* CONFIG_HS20 */
1526
1527         switch (info_id) {
1528         case ANQP_CAPABILITY_LIST:
1529                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1530                         " ANQP Capability list", MAC2STR(sa));
1531                 break;
1532         case ANQP_VENUE_NAME:
1533                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1534                         " Venue Name", MAC2STR(sa));
1535                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
1536                 if (bss) {
1537                         wpabuf_free(bss->anqp_venue_name);
1538                         bss->anqp_venue_name = wpabuf_alloc_copy(pos, slen);
1539                 }
1540                 break;
1541         case ANQP_NETWORK_AUTH_TYPE:
1542                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1543                         " Network Authentication Type information",
1544                         MAC2STR(sa));
1545                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
1546                                   "Type", pos, slen);
1547                 if (bss) {
1548                         wpabuf_free(bss->anqp_network_auth_type);
1549                         bss->anqp_network_auth_type =
1550                                 wpabuf_alloc_copy(pos, slen);
1551                 }
1552                 break;
1553         case ANQP_ROAMING_CONSORTIUM:
1554                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1555                         " Roaming Consortium list", MAC2STR(sa));
1556                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1557                                   pos, slen);
1558                 if (bss) {
1559                         wpabuf_free(bss->anqp_roaming_consortium);
1560                         bss->anqp_roaming_consortium =
1561                                 wpabuf_alloc_copy(pos, slen);
1562                 }
1563                 break;
1564         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1565                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1566                         " IP Address Type Availability information",
1567                         MAC2STR(sa));
1568                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1569                             pos, slen);
1570                 if (bss) {
1571                         wpabuf_free(bss->anqp_ip_addr_type_availability);
1572                         bss->anqp_ip_addr_type_availability =
1573                                 wpabuf_alloc_copy(pos, slen);
1574                 }
1575                 break;
1576         case ANQP_NAI_REALM:
1577                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1578                         " NAI Realm list", MAC2STR(sa));
1579                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1580                 if (bss) {
1581                         wpabuf_free(bss->anqp_nai_realm);
1582                         bss->anqp_nai_realm = wpabuf_alloc_copy(pos, slen);
1583                 }
1584                 break;
1585         case ANQP_3GPP_CELLULAR_NETWORK:
1586                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1587                         " 3GPP Cellular Network information", MAC2STR(sa));
1588                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1589                                   pos, slen);
1590                 if (bss) {
1591                         wpabuf_free(bss->anqp_3gpp);
1592                         bss->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1593                 }
1594                 break;
1595         case ANQP_DOMAIN_NAME:
1596                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1597                         " Domain Name list", MAC2STR(sa));
1598                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1599                 if (bss) {
1600                         wpabuf_free(bss->anqp_domain_name);
1601                         bss->anqp_domain_name = wpabuf_alloc_copy(pos, slen);
1602                 }
1603                 break;
1604         case ANQP_VENDOR_SPECIFIC:
1605                 if (slen < 3)
1606                         return;
1607
1608                 switch (WPA_GET_BE24(pos)) {
1609 #ifdef CONFIG_HS20
1610                 case OUI_WFA:
1611                         pos += 3;
1612                         slen -= 3;
1613
1614                         if (slen < 1)
1615                                 return;
1616                         type = *pos++;
1617                         slen--;
1618
1619                         switch (type) {
1620                         case HS20_ANQP_OUI_TYPE:
1621                                 hs20_parse_rx_hs20_anqp_resp(wpa_s, sa, pos,
1622                                                              slen);
1623                                 break;
1624                         default:
1625                                 wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
1626                                            "vendor type %u", type);
1627                                 break;
1628                         }
1629                         break;
1630 #endif /* CONFIG_HS20 */
1631                 default:
1632                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1633                                    "vendor-specific ANQP OUI %06x",
1634                                    WPA_GET_BE24(pos));
1635                         return;
1636                 }
1637                 break;
1638         default:
1639                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1640                            "%u", info_id);
1641                 break;
1642         }
1643 }
1644
1645
1646 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1647                   enum gas_query_result result,
1648                   const struct wpabuf *adv_proto,
1649                   const struct wpabuf *resp, u16 status_code)
1650 {
1651         struct wpa_supplicant *wpa_s = ctx;
1652         const u8 *pos;
1653         const u8 *end;
1654         u16 info_id;
1655         u16 slen;
1656
1657         if (result != GAS_QUERY_SUCCESS)
1658                 return;
1659
1660         pos = wpabuf_head(adv_proto);
1661         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1662             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1663                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1664                            "Protocol in response");
1665                 return;
1666         }
1667
1668         pos = wpabuf_head(resp);
1669         end = pos + wpabuf_len(resp);
1670
1671         while (pos < end) {
1672                 if (pos + 4 > end) {
1673                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1674                         break;
1675                 }
1676                 info_id = WPA_GET_LE16(pos);
1677                 pos += 2;
1678                 slen = WPA_GET_LE16(pos);
1679                 pos += 2;
1680                 if (pos + slen > end) {
1681                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1682                                    "for Info ID %u", info_id);
1683                         break;
1684                 }
1685                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1686                                                 slen);
1687                 pos += slen;
1688         }
1689 }
1690
1691
1692 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1693                                           struct wpa_scan_results *scan_res)
1694 {
1695         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1696                    "ANQP fetch");
1697         interworking_start_fetch_anqp(wpa_s);
1698 }
1699
1700
1701 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1702 {
1703         interworking_stop_fetch_anqp(wpa_s);
1704         wpa_s->network_select = 1;
1705         wpa_s->auto_select = !!auto_select;
1706         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
1707                    "selection");
1708         wpa_s->scan_res_handler = interworking_scan_res_handler;
1709         wpa_s->scan_req = 2;
1710         wpa_supplicant_req_scan(wpa_s, 0, 0);
1711
1712         return 0;
1713 }