wpa_supplicant/interworking.c

   1 /*
   2  * Interworking (IEEE 802.11u)
   3  * Copyright (c) 2011, Qualcomm Atheros
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "common/ieee802_11_defs.h"
  19 #include "common/gas.h"
  20 #include "common/wpa_ctrl.h"
  21 #include "drivers/driver.h"
  22 #include "eap_common/eap_defs.h"
  23 #include "eap_peer/eap_methods.h"
  24 #include "wpa_supplicant_i.h"
  25 #include "config.h"
  26 #include "bss.h"
  27 #include "scan.h"
  28 #include "notify.h"
  29 #include "gas_query.h"
  30 #include "interworking.h"
  31
  32
  33 #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
  34 #define INTERWORKING_3GPP
  35 #else
  36 #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
  37 #define INTERWORKING_3GPP
  38 #else
  39 #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
  40 #define INTERWORKING_3GPP
  41 #endif
  42 #endif
  43 #endif
  44
  45 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  46
  47
  48 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  49                                       struct wpabuf *extra)
  50 {
  51         struct wpabuf *buf;
  52         size_t i;
  53         u8 *len_pos;
  54
  55         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  56                                          (extra ? wpabuf_len(extra) : 0));
  57         if (buf == NULL)
  58                 return NULL;
  59
  60         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  61         for (i = 0; i < num_ids; i++)
  62                 wpabuf_put_le16(buf, info_ids[i]);
  63         gas_anqp_set_element_len(buf, len_pos);
  64         if (extra)
  65                 wpabuf_put_buf(buf, extra);
  66
  67         gas_anqp_set_len(buf);
  68
  69         return buf;
  70 }
  71
  72
  73 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  74                                       u8 dialog_token,
  75                                       enum gas_query_result result,
  76                                       const struct wpabuf *adv_proto,
  77                                       const struct wpabuf *resp,
  78                                       u16 status_code)
  79 {
  80         struct wpa_supplicant *wpa_s = ctx;
  81
  82         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
  83                      status_code);
  84         interworking_next_anqp_fetch(wpa_s);
  85 }
  86
  87
  88 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
  89                                       struct wpa_bss *bss)
  90 {
  91         struct wpabuf *buf;
  92         int ret = 0;
  93         int res;
  94         u16 info_ids[] = {
  95                 ANQP_CAPABILITY_LIST,
  96                 ANQP_VENUE_NAME,
  97                 ANQP_NETWORK_AUTH_TYPE,
  98                 ANQP_ROAMING_CONSORTIUM,
  99                 ANQP_IP_ADDR_TYPE_AVAILABILITY,
 100                 ANQP_NAI_REALM,
 101                 ANQP_3GPP_CELLULAR_NETWORK,
 102                 ANQP_DOMAIN_NAME
 103         };
 104         struct wpabuf *extra = NULL;
 105
 106         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
 107                    MAC2STR(bss->bssid));
 108
 109         buf = anqp_build_req(info_ids, sizeof(info_ids) / sizeof(info_ids[0]),
 110                              extra);
 111         wpabuf_free(extra);
 112         if (buf == NULL)
 113                 return -1;
 114
 115         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 116                             interworking_anqp_resp_cb, wpa_s);
 117         if (res < 0) {
 118                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 119                 ret = -1;
 120         } else
 121                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 122                            "%u", res);
 123
 124         wpabuf_free(buf);
 125         return ret;
 126 }
 127
 128
 129 struct nai_realm_eap {
 130         u8 method;
 131         u8 inner_method;
 132         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 133         u8 cred_type;
 134         u8 tunneled_cred_type;
 135 };
 136
 137 struct nai_realm {
 138         u8 encoding;
 139         char *realm;
 140         u8 eap_count;
 141         struct nai_realm_eap *eap;
 142 };
 143
 144
 145 static void nai_realm_free(struct nai_realm *realms, u16 count)
 146 {
 147         u16 i;
 148
 149         if (realms == NULL)
 150                 return;
 151         for (i = 0; i < count; i++) {
 152                 os_free(realms[i].eap);
 153                 os_free(realms[i].realm);
 154         }
 155         os_free(realms);
 156 }
 157
 158
 159 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 160                                       const u8 *end)
 161 {
 162         u8 elen, auth_count, a;
 163         const u8 *e_end;
 164
 165         if (pos + 3 > end) {
 166                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 167                 return NULL;
 168         }
 169
 170         elen = *pos++;
 171         if (pos + elen > end || elen < 2) {
 172                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 173                 return NULL;
 174         }
 175         e_end = pos + elen;
 176         e->method = *pos++;
 177         auth_count = *pos++;
 178         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 179                    elen, e->method, auth_count);
 180
 181         for (a = 0; a < auth_count; a++) {
 182                 u8 id, len;
 183
 184                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 185                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 186                                    "Parameter subfield");
 187                         return NULL;
 188                 }
 189
 190                 id = *pos++;
 191                 len = *pos++;
 192
 193                 switch (id) {
 194                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 195                         if (len < 1)
 196                                 break;
 197                         e->inner_non_eap = *pos;
 198                         if (e->method != EAP_TYPE_TTLS)
 199                                 break;
 200                         switch (*pos) {
 201                         case NAI_REALM_INNER_NON_EAP_PAP:
 202                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 203                                 break;
 204                         case NAI_REALM_INNER_NON_EAP_CHAP:
 205                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 206                                 break;
 207                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 208                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 209                                 break;
 210                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 211                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 212                                 break;
 213                         }
 214                         break;
 215                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 216                         if (len < 1)
 217                                 break;
 218                         e->inner_method = *pos;
 219                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 220                                    e->inner_method);
 221                         break;
 222                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 223                         if (len < 1)
 224                                 break;
 225                         e->cred_type = *pos;
 226                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 227                                    e->cred_type);
 228                         break;
 229                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 230                         if (len < 1)
 231                                 break;
 232                         e->tunneled_cred_type = *pos;
 233                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 234                                    "Type: %u", e->tunneled_cred_type);
 235                         break;
 236                 default:
 237                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 238                                    "Parameter: id=%u len=%u", id, len);
 239                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 240                                     "Value", pos, len);
 241                         break;
 242                 }
 243
 244                 pos += len;
 245         }
 246
 247         return e_end;
 248 }
 249
 250
 251 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 252                                         const u8 *end)
 253 {
 254         u16 len;
 255         const u8 *f_end;
 256         u8 realm_len, e;
 257
 258         if (end - pos < 4) {
 259                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 260                            "fixed fields");
 261                 return NULL;
 262         }
 263
 264         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 265         pos += 2;
 266         if (pos + len > end || len < 3) {
 267                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 268                            "(len=%u; left=%u)",
 269                            len, (unsigned int) (end - pos));
 270                 return NULL;
 271         }
 272         f_end = pos + len;
 273
 274         r->encoding = *pos++;
 275         realm_len = *pos++;
 276         if (pos + realm_len > f_end) {
 277                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 278                            "(len=%u; left=%u)",
 279                            realm_len, (unsigned int) (f_end - pos));
 280                 return NULL;
 281         }
 282         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 283         r->realm = os_malloc(realm_len + 1);
 284         if (r->realm == NULL)
 285                 return NULL;
 286         os_memcpy(r->realm, pos, realm_len);
 287         r->realm[realm_len] = '\0';
 288         pos += realm_len;
 289
 290         if (pos + 1 > f_end) {
 291                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 292                 return NULL;
 293         }
 294         r->eap_count = *pos++;
 295         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 296         if (pos + r->eap_count * 3 > f_end) {
 297                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 298                 return NULL;
 299         }
 300         r->eap = os_zalloc(r->eap_count * sizeof(struct nai_realm_eap));
 301         if (r->eap == NULL)
 302                 return NULL;
 303
 304         for (e = 0; e < r->eap_count; e++) {
 305                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 306                 if (pos == NULL)
 307                         return NULL;
 308         }
 309
 310         return f_end;
 311 }
 312
 313
 314 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 315 {
 316         struct nai_realm *realm;
 317         const u8 *pos, *end;
 318         u16 i, num;
 319
 320         if (anqp == NULL || wpabuf_len(anqp) < 2)
 321                 return NULL;
 322
 323         pos = wpabuf_head_u8(anqp);
 324         end = pos + wpabuf_len(anqp);
 325         num = WPA_GET_LE16(pos);
 326         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 327         pos += 2;
 328
 329         if (num * 5 > end - pos) {
 330                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 331                            "enough data (%u octets) for that many realms",
 332                            num, (unsigned int) (end - pos));
 333                 return NULL;
 334         }
 335
 336         realm = os_zalloc(num * sizeof(struct nai_realm));
 337         if (realm == NULL)
 338                 return NULL;
 339
 340         for (i = 0; i < num; i++) {
 341                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 342                 if (pos == NULL) {
 343                         nai_realm_free(realm, num);
 344                         return NULL;
 345                 }
 346         }
 347
 348         *count = num;
 349         return realm;
 350 }
 351
 352
 353 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 354 {
 355         char *tmp, *pos, *end;
 356         int match = 0;
 357
 358         if (realm->realm == NULL || home_realm == NULL)
 359                 return 0;
 360
 361         if (os_strchr(realm->realm, ';') == NULL)
 362                 return os_strcasecmp(realm->realm, home_realm) == 0;
 363
 364         tmp = os_strdup(realm->realm);
 365         if (tmp == NULL)
 366                 return 0;
 367
 368         pos = tmp;
 369         while (*pos) {
 370                 end = os_strchr(pos, ';');
 371                 if (end)
 372                         *end = '\0';
 373                 if (os_strcasecmp(pos, home_realm) == 0) {
 374                         match = 1;
 375                         break;
 376                 }
 377                 if (end == NULL)
 378                         break;
 379                 pos = end + 1;
 380         }
 381
 382         os_free(tmp);
 383
 384         return match;
 385 }
 386
 387
 388 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 389 {
 390         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 391                 return 0; /* method not supported */
 392
 393         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 394                 /* Only tunneled methods with username/password supported */
 395                 return 0;
 396         }
 397
 398         if (eap->method == EAP_TYPE_PEAP &&
 399             eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 400                 return 0;
 401
 402         if (eap->method == EAP_TYPE_TTLS) {
 403                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 404                         return 0;
 405                 if (eap->inner_method &&
 406                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 407                         return 0;
 408                 if (eap->inner_non_eap &&
 409                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 410                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 411                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 412                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 413                         return 0;
 414         }
 415
 416         if (eap->inner_method &&
 417             eap->inner_method != EAP_TYPE_GTC &&
 418             eap->inner_method != EAP_TYPE_MSCHAPV2)
 419                 return 0;
 420
 421         return 1;
 422 }
 423
 424
 425 struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
 426                                           struct nai_realm *realm)
 427 {
 428         u8 e;
 429
 430         if (wpa_s->conf->home_username == NULL ||
 431             wpa_s->conf->home_username[0] == '\0' ||
 432             wpa_s->conf->home_password == NULL ||
 433             wpa_s->conf->home_password[0] == '\0')
 434                 return NULL;
 435
 436         for (e = 0; e < realm->eap_count; e++) {
 437                 struct nai_realm_eap *eap = &realm->eap[e];
 438                 if (nai_realm_cred_username(eap))
 439                         return eap;
 440         }
 441
 442         return NULL;
 443 }
 444
 445
 446 #ifdef INTERWORKING_3GPP
 447
 448 static int plmn_id_match(struct wpabuf *anqp, const char *imsi)
 449 {
 450         const char *sep;
 451         u8 plmn[3];
 452         const u8 *pos, *end;
 453         u8 udhl;
 454
 455         sep = os_strchr(imsi, '-');
 456         if (sep == NULL || (sep - imsi != 5 && sep - imsi != 6))
 457                 return 0;
 458
 459         /* See Annex A of 3GPP TS 24.234 v8.1.0 for description */
 460         plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
 461         plmn[1] = imsi[2] - '0';
 462         if (sep - imsi == 6)
 463                 plmn[1] |= (imsi[5] - '0') << 4;
 464         else
 465                 plmn[1] |= 0xf0;
 466         plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
 467
 468         if (anqp == NULL)
 469                 return 0;
 470         pos = wpabuf_head_u8(anqp);
 471         end = pos + wpabuf_len(anqp);
 472         if (pos + 2 > end)
 473                 return 0;
 474         if (*pos != 0) {
 475                 wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
 476                 return 0;
 477         }
 478         pos++;
 479         udhl = *pos++;
 480         if (pos + udhl > end) {
 481                 wpa_printf(MSG_DEBUG, "Invalid UDHL");
 482                 return 0;
 483         }
 484         end = pos + udhl;
 485
 486         while (pos + 2 <= end) {
 487                 u8 iei, len;
 488                 const u8 *l_end;
 489                 iei = *pos++;
 490                 len = *pos++ & 0x7f;
 491                 if (pos + len > end)
 492                         break;
 493                 l_end = pos + len;
 494
 495                 if (iei == 0 && len > 0) {
 496                         /* PLMN List */
 497                         u8 num, i;
 498                         num = *pos++;
 499                         for (i = 0; i < num; i++) {
 500                                 if (pos + 3 > end)
 501                                         break;
 502                                 if (os_memcmp(pos, plmn, 3) == 0)
 503                                         return 1; /* Found matching PLMN */
 504                         }
 505                 }
 506
 507                 pos = l_end;
 508         }
 509
 510         return 0;
 511 }
 512
 513
 514 static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 515 {
 516         const char *sep, *msin;
 517         char nai[100], *end, *pos;
 518         size_t msin_len, plmn_len;
 519
 520         /*
 521          * TS 23.003, Clause 14 (3GPP to WLAN Interworking)
 522          * Root NAI:
 523          * <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
 524          * <MNC> is zero-padded to three digits in case two-digit MNC is used
 525          */
 526
 527         if (imsi == NULL || os_strlen(imsi) > 16) {
 528                 wpa_printf(MSG_DEBUG, "No valid IMSI available");
 529                 return -1;
 530         }
 531         sep = os_strchr(imsi, '-');
 532         if (sep == NULL)
 533                 return -1;
 534         plmn_len = sep - imsi;
 535         if (plmn_len != 5 && plmn_len != 6)
 536                 return -1;
 537         msin = sep + 1;
 538         msin_len = os_strlen(msin);
 539
 540         pos = nai;
 541         end = pos + sizeof(nai);
 542         *pos++ = prefix;
 543         os_memcpy(pos, imsi, plmn_len);
 544         pos += plmn_len;
 545         os_memcpy(pos, msin, msin_len);
 546         pos += msin_len;
 547         pos += os_snprintf(pos, end - pos, "@wlan.mnc");
 548         if (plmn_len == 5) {
 549                 *pos++ = '0';
 550                 *pos++ = imsi[3];
 551                 *pos++ = imsi[4];
 552         } else {
 553                 *pos++ = imsi[3];
 554                 *pos++ = imsi[4];
 555                 *pos++ = imsi[5];
 556         }
 557         pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
 558                            imsi[0], imsi[1], imsi[2]);
 559
 560         return wpa_config_set_quoted(ssid, "identity", nai);
 561 }
 562
 563 #endif /* INTERWORKING_3GPP */
 564
 565
 566 static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 567                                      struct wpa_bss *bss)
 568 {
 569 #ifdef INTERWORKING_3GPP
 570         struct wpa_ssid *ssid;
 571         const u8 *ie;
 572
 573         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 574         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
 575                    MAC2STR(bss->bssid));
 576
 577         ssid = wpa_config_add_network(wpa_s->conf);
 578         if (ssid == NULL)
 579                 return -1;
 580
 581         wpas_notify_network_added(wpa_s, ssid);
 582         wpa_config_set_network_defaults(ssid);
 583         ssid->temporary = 1;
 584         ssid->ssid = os_zalloc(ie[1] + 1);
 585         if (ssid->ssid == NULL)
 586                 goto fail;
 587         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 588         ssid->ssid_len = ie[1];
 589
 590         /* TODO: figure out whether to use EAP-SIM, EAP-AKA, or EAP-AKA' */
 591         if (wpa_config_set(ssid, "eap", "SIM", 0) < 0) {
 592                 wpa_printf(MSG_DEBUG, "EAP-SIM not supported");
 593                 goto fail;
 594         }
 595         if (set_root_nai(ssid, wpa_s->conf->home_imsi, '1') < 0) {
 596                 wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
 597                 goto fail;
 598         }
 599
 600         if (wpa_s->conf->home_milenage && wpa_s->conf->home_milenage[0]) {
 601                 if (wpa_config_set_quoted(ssid, "password",
 602                                           wpa_s->conf->home_milenage) < 0)
 603                         goto fail;
 604         } else {
 605                 /* TODO: PIN */
 606                 if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
 607                         goto fail;
 608         }
 609
 610         if (wpa_s->conf->home_password && wpa_s->conf->home_password[0] &&
 611             wpa_config_set_quoted(ssid, "password", wpa_s->conf->home_password)
 612             < 0)
 613                 goto fail;
 614
 615         wpa_supplicant_select_network(wpa_s, ssid);
 616
 617         return 0;
 618
 619 fail:
 620         wpas_notify_network_removed(wpa_s, ssid);
 621         wpa_config_remove_network(wpa_s->conf, ssid->id);
 622 #endif /* INTERWORKING_3GPP */
 623         return -1;
 624 }
 625
 626
 627 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 628 {
 629         struct wpa_ssid *ssid;
 630         struct nai_realm *realm;
 631         struct nai_realm_eap *eap = NULL;
 632         u16 count, i;
 633         char buf[100];
 634         const u8 *ie;
 635
 636         if (bss == NULL)
 637                 return -1;
 638         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 639         if (ie == NULL || ie[1] == 0) {
 640                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
 641                            MACSTR, MAC2STR(bss->bssid));
 642                 return -1;
 643         }
 644
 645         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
 646         if (realm == NULL) {
 647                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
 648                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
 649                 count = 0;
 650         }
 651
 652         for (i = 0; i < count; i++) {
 653                 if (!nai_realm_match(&realm[i], wpa_s->conf->home_realm))
 654                         continue;
 655                 eap = nai_realm_find_eap(wpa_s, &realm[i]);
 656                 if (eap)
 657                         break;
 658         }
 659
 660         if (!eap) {
 661                 if (interworking_connect_3gpp(wpa_s, bss) == 0) {
 662                         if (realm)
 663                                 nai_realm_free(realm, count);
 664                         return 0;
 665                 }
 666
 667                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
 668                            "and EAP method found for " MACSTR,
 669                            MAC2STR(bss->bssid));
 670                 nai_realm_free(realm, count);
 671                 return -1;
 672         }
 673
 674         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
 675                    MAC2STR(bss->bssid));
 676
 677         ssid = wpa_config_add_network(wpa_s->conf);
 678         if (ssid == NULL) {
 679                 nai_realm_free(realm, count);
 680                 return -1;
 681         }
 682         wpas_notify_network_added(wpa_s, ssid);
 683         wpa_config_set_network_defaults(ssid);
 684         ssid->temporary = 1;
 685         ssid->ssid = os_zalloc(ie[1] + 1);
 686         if (ssid->ssid == NULL)
 687                 goto fail;
 688         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 689         ssid->ssid_len = ie[1];
 690
 691         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
 692                                                      eap->method), 0) < 0)
 693                 goto fail;
 694
 695         if (wpa_s->conf->home_username && wpa_s->conf->home_username[0] &&
 696             wpa_config_set_quoted(ssid, "identity",
 697                                   wpa_s->conf->home_username) < 0)
 698                 goto fail;
 699
 700         if (wpa_s->conf->home_password && wpa_s->conf->home_password[0] &&
 701             wpa_config_set_quoted(ssid, "password", wpa_s->conf->home_password)
 702             < 0)
 703                 goto fail;
 704
 705         switch (eap->method) {
 706         case EAP_TYPE_TTLS:
 707                 if (eap->inner_method) {
 708                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
 709                                     eap_get_name(EAP_VENDOR_IETF,
 710                                                  eap->inner_method));
 711                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
 712                                 goto fail;
 713                         break;
 714                 }
 715                 switch (eap->inner_non_eap) {
 716                 case NAI_REALM_INNER_NON_EAP_PAP:
 717                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
 718                             0)
 719                                 goto fail;
 720                         break;
 721                 case NAI_REALM_INNER_NON_EAP_CHAP:
 722                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
 723                             < 0)
 724                                 goto fail;
 725                         break;
 726                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
 727                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
 728                             < 0)
 729                                 goto fail;
 730                         break;
 731                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 732                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
 733                                            0) < 0)
 734                                 goto fail;
 735                         break;
 736                 }
 737                 break;
 738         case EAP_TYPE_PEAP:
 739                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
 740                             eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
 741                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
 742                         goto fail;
 743                 break;
 744         }
 745
 746         if (wpa_s->conf->home_ca_cert && wpa_s->conf->home_ca_cert[0] &&
 747             wpa_config_set_quoted(ssid, "ca_cert", wpa_s->conf->home_ca_cert) <
 748             0)
 749                 goto fail;
 750
 751         nai_realm_free(realm, count);
 752
 753         wpa_supplicant_select_network(wpa_s, ssid);
 754
 755         return 0;
 756
 757 fail:
 758         wpas_notify_network_removed(wpa_s, ssid);
 759         wpa_config_remove_network(wpa_s->conf, ssid->id);
 760         nai_realm_free(realm, count);
 761         return -1;
 762 }
 763
 764
 765 static int interworking_credentials_available_3gpp(
 766         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 767 {
 768         int ret = 0;
 769
 770 #ifdef INTERWORKING_3GPP
 771         if (bss->anqp_3gpp == NULL)
 772                 return ret;
 773
 774         if (wpa_s->conf->home_imsi == NULL || !wpa_s->conf->home_imsi[0] ||
 775             wpa_s->conf->home_milenage == NULL ||
 776             !wpa_s->conf->home_milenage[0])
 777                 return ret;
 778
 779         wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from " MACSTR,
 780                    MAC2STR(bss->bssid));
 781         ret = plmn_id_match(bss->anqp_3gpp, wpa_s->conf->home_imsi);
 782         wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
 783 #endif /* INTERWORKING_3GPP */
 784         return ret;
 785 }
 786
 787
 788 static int interworking_credentials_available_realm(
 789         struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 790 {
 791         struct nai_realm *realm;
 792         u16 count, i;
 793         int found = 0;
 794
 795         if (bss->anqp_nai_realm == NULL)
 796                 return 0;
 797
 798         if (wpa_s->conf->home_realm == NULL)
 799                 return 0;
 800
 801         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
 802                    MACSTR, MAC2STR(bss->bssid));
 803         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
 804         if (realm == NULL) {
 805                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
 806                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
 807                 return 0;
 808         }
 809
 810         for (i = 0; i < count; i++) {
 811                 if (!nai_realm_match(&realm[i], wpa_s->conf->home_realm))
 812                         continue;
 813                 if (nai_realm_find_eap(wpa_s, &realm[i])) {
 814                         found++;
 815                         break;
 816                 }
 817         }
 818
 819         nai_realm_free(realm, count);
 820
 821         return found;
 822 }
 823
 824
 825 static int interworking_credentials_available(struct wpa_supplicant *wpa_s,
 826                                               struct wpa_bss *bss)
 827 {
 828         return interworking_credentials_available_realm(wpa_s, bss) ||
 829                 interworking_credentials_available_3gpp(wpa_s, bss);
 830 }
 831
 832
 833 static void interworking_select_network(struct wpa_supplicant *wpa_s)
 834 {
 835         struct wpa_bss *bss, *selected = NULL;
 836         unsigned int count = 0;
 837
 838         wpa_s->network_select = 0;
 839
 840         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 841                 if (!interworking_credentials_available(wpa_s, bss))
 842                         continue;
 843                 count++;
 844                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR,
 845                         MAC2STR(bss->bssid));
 846                 if (selected == NULL && wpa_s->auto_select)
 847                         selected = bss;
 848         }
 849
 850         if (count == 0) {
 851                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
 852                         "with matching credentials found");
 853         }
 854
 855         if (selected)
 856                 interworking_connect(wpa_s, selected);
 857 }
 858
 859
 860 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
 861 {
 862         struct wpa_bss *bss;
 863         int found = 0;
 864         const u8 *ie;
 865
 866         if (!wpa_s->fetch_anqp_in_progress)
 867                 return;
 868
 869         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 870                 if (!(bss->caps & IEEE80211_CAP_ESS))
 871                         continue;
 872                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
 873                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
 874                         continue; /* AP does not support Interworking */
 875
 876                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
 877                         found++;
 878                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
 879                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
 880                                 MACSTR, MAC2STR(bss->bssid));
 881                         interworking_anqp_send_req(wpa_s, bss);
 882                         break;
 883                 }
 884         }
 885
 886         if (found == 0) {
 887                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
 888                 wpa_s->fetch_anqp_in_progress = 0;
 889                 if (wpa_s->network_select)
 890                         interworking_select_network(wpa_s);
 891         }
 892 }
 893
 894
 895 static void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
 896 {
 897         struct wpa_bss *bss;
 898
 899         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
 900                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
 901
 902         wpa_s->fetch_anqp_in_progress = 1;
 903         interworking_next_anqp_fetch(wpa_s);
 904 }
 905
 906
 907 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
 908 {
 909         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
 910                 return 0;
 911
 912         wpa_s->network_select = 0;
 913
 914         interworking_start_fetch_anqp(wpa_s);
 915
 916         return 0;
 917 }
 918
 919
 920 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
 921 {
 922         if (!wpa_s->fetch_anqp_in_progress)
 923                 return;
 924
 925         wpa_s->fetch_anqp_in_progress = 0;
 926 }
 927
 928
 929 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
 930                   u16 info_ids[], size_t num_ids)
 931 {
 932         struct wpabuf *buf;
 933         int ret = 0;
 934         int freq;
 935         struct wpa_bss *bss;
 936         int res;
 937
 938         freq = wpa_s->assoc_freq;
 939         bss = wpa_bss_get_bssid(wpa_s, dst);
 940         if (bss)
 941                 freq = bss->freq;
 942         if (freq <= 0)
 943                 return -1;
 944
 945         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
 946                    MAC2STR(dst), (unsigned int) num_ids);
 947
 948         buf = anqp_build_req(info_ids, num_ids, NULL);
 949         if (buf == NULL)
 950                 return -1;
 951
 952         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
 953         if (res < 0) {
 954                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 955                 ret = -1;
 956         } else
 957                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 958                            "%u", res);
 959
 960         wpabuf_free(buf);
 961         return ret;
 962 }
 963
 964
 965 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
 966                                             const u8 *sa, u16 info_id,
 967                                             const u8 *data, size_t slen)
 968 {
 969         const u8 *pos = data;
 970         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
 971
 972         switch (info_id) {
 973         case ANQP_CAPABILITY_LIST:
 974                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 975                         " ANQP Capability list", MAC2STR(sa));
 976                 break;
 977         case ANQP_VENUE_NAME:
 978                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 979                         " Venue Name", MAC2STR(sa));
 980                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
 981                 if (bss) {
 982                         wpabuf_free(bss->anqp_venue_name);
 983                         bss->anqp_venue_name = wpabuf_alloc_copy(pos, slen);
 984                 }
 985                 break;
 986         case ANQP_NETWORK_AUTH_TYPE:
 987                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 988                         " Network Authentication Type information",
 989                         MAC2STR(sa));
 990                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
 991                                   "Type", pos, slen);
 992                 if (bss) {
 993                         wpabuf_free(bss->anqp_network_auth_type);
 994                         bss->anqp_network_auth_type =
 995                                 wpabuf_alloc_copy(pos, slen);
 996                 }
 997                 break;
 998         case ANQP_ROAMING_CONSORTIUM:
 999                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1000                         " Roaming Consortium list", MAC2STR(sa));
1001                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
1002                                   pos, slen);
1003                 if (bss) {
1004                         wpabuf_free(bss->anqp_roaming_consortium);
1005                         bss->anqp_roaming_consortium =
1006                                 wpabuf_alloc_copy(pos, slen);
1007                 }
1008                 break;
1009         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
1010                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1011                         " IP Address Type Availability information",
1012                         MAC2STR(sa));
1013                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
1014                             pos, slen);
1015                 if (bss) {
1016                         wpabuf_free(bss->anqp_ip_addr_type_availability);
1017                         bss->anqp_ip_addr_type_availability =
1018                                 wpabuf_alloc_copy(pos, slen);
1019                 }
1020                 break;
1021         case ANQP_NAI_REALM:
1022                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1023                         " NAI Realm list", MAC2STR(sa));
1024                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
1025                 if (bss) {
1026                         wpabuf_free(bss->anqp_nai_realm);
1027                         bss->anqp_nai_realm = wpabuf_alloc_copy(pos, slen);
1028                 }
1029                 break;
1030         case ANQP_3GPP_CELLULAR_NETWORK:
1031                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1032                         " 3GPP Cellular Network information", MAC2STR(sa));
1033                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
1034                                   pos, slen);
1035                 if (bss) {
1036                         wpabuf_free(bss->anqp_3gpp);
1037                         bss->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
1038                 }
1039                 break;
1040         case ANQP_DOMAIN_NAME:
1041                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
1042                         " Domain Name list", MAC2STR(sa));
1043                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
1044                 if (bss) {
1045                         wpabuf_free(bss->anqp_domain_name);
1046                         bss->anqp_domain_name = wpabuf_alloc_copy(pos, slen);
1047                 }
1048                 break;
1049         case ANQP_VENDOR_SPECIFIC:
1050                 if (slen < 3)
1051                         return;
1052
1053                 switch (WPA_GET_BE24(pos)) {
1054                 default:
1055                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
1056                                    "vendor-specific ANQP OUI %06x",
1057                                    WPA_GET_BE24(pos));
1058                         return;
1059                 }
1060                 break;
1061         default:
1062                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
1063                            "%u", info_id);
1064                 break;
1065         }
1066 }
1067
1068
1069 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
1070                   enum gas_query_result result,
1071                   const struct wpabuf *adv_proto,
1072                   const struct wpabuf *resp, u16 status_code)
1073 {
1074         struct wpa_supplicant *wpa_s = ctx;
1075         const u8 *pos;
1076         const u8 *end;
1077         u16 info_id;
1078         u16 slen;
1079
1080         if (result != GAS_QUERY_SUCCESS)
1081                 return;
1082
1083         pos = wpabuf_head(adv_proto);
1084         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
1085             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
1086                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
1087                            "Protocol in response");
1088                 return;
1089         }
1090
1091         pos = wpabuf_head(resp);
1092         end = pos + wpabuf_len(resp);
1093
1094         while (pos < end) {
1095                 if (pos + 4 > end) {
1096                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
1097                         break;
1098                 }
1099                 info_id = WPA_GET_LE16(pos);
1100                 pos += 2;
1101                 slen = WPA_GET_LE16(pos);
1102                 pos += 2;
1103                 if (pos + slen > end) {
1104                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
1105                                    "for Info ID %u", info_id);
1106                         break;
1107                 }
1108                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
1109                                                 slen);
1110                 pos += slen;
1111         }
1112 }
1113
1114
1115 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
1116                                           struct wpa_scan_results *scan_res)
1117 {
1118         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
1119                    "ANQP fetch");
1120         interworking_start_fetch_anqp(wpa_s);
1121 }
1122
1123
1124 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
1125 {
1126         interworking_stop_fetch_anqp(wpa_s);
1127         wpa_s->network_select = 1;
1128         wpa_s->auto_select = !!auto_select;
1129         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
1130                    "selection");
1131         wpa_s->scan_res_handler = interworking_scan_res_handler;
1132         wpa_s->scan_req = 2;
1133         wpa_supplicant_req_scan(wpa_s, 0, 0);
1134
1135         return 0;
1136 }