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 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
  34
  35
  36 static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
  37                                       struct wpabuf *extra)
  38 {
  39         struct wpabuf *buf;
  40         size_t i;
  41         u8 *len_pos;
  42
  43         buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
  44                                          (extra ? wpabuf_len(extra) : 0));
  45         if (buf == NULL)
  46                 return NULL;
  47
  48         len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
  49         for (i = 0; i < num_ids; i++)
  50                 wpabuf_put_le16(buf, info_ids[i]);
  51         gas_anqp_set_element_len(buf, len_pos);
  52         if (extra)
  53                 wpabuf_put_buf(buf, extra);
  54
  55         gas_anqp_set_len(buf);
  56
  57         return buf;
  58 }
  59
  60
  61 static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
  62                                       u8 dialog_token,
  63                                       enum gas_query_result result,
  64                                       const struct wpabuf *adv_proto,
  65                                       const struct wpabuf *resp,
  66                                       u16 status_code)
  67 {
  68         struct wpa_supplicant *wpa_s = ctx;
  69
  70         anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
  71                      status_code);
  72         interworking_next_anqp_fetch(wpa_s);
  73 }
  74
  75
  76 static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
  77                                       struct wpa_bss *bss)
  78 {
  79         struct wpabuf *buf;
  80         int ret = 0;
  81         int res;
  82         u16 info_ids[] = {
  83                 ANQP_CAPABILITY_LIST,
  84                 ANQP_VENUE_NAME,
  85                 ANQP_NETWORK_AUTH_TYPE,
  86                 ANQP_ROAMING_CONSORTIUM,
  87                 ANQP_IP_ADDR_TYPE_AVAILABILITY,
  88                 ANQP_NAI_REALM,
  89                 ANQP_3GPP_CELLULAR_NETWORK,
  90                 ANQP_DOMAIN_NAME
  91         };
  92         struct wpabuf *extra = NULL;
  93
  94         wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
  95                    MAC2STR(bss->bssid));
  96
  97         buf = anqp_build_req(info_ids, sizeof(info_ids) / sizeof(info_ids[0]),
  98                              extra);
  99         wpabuf_free(extra);
 100         if (buf == NULL)
 101                 return -1;
 102
 103         res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
 104                             interworking_anqp_resp_cb, wpa_s);
 105         if (res < 0) {
 106                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 107                 ret = -1;
 108         } else
 109                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 110                            "%u", res);
 111
 112         wpabuf_free(buf);
 113         return ret;
 114 }
 115
 116
 117 struct nai_realm_eap {
 118         u8 method;
 119         u8 inner_method;
 120         enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
 121         u8 cred_type;
 122         u8 tunneled_cred_type;
 123 };
 124
 125 struct nai_realm {
 126         u8 encoding;
 127         char *realm;
 128         u8 eap_count;
 129         struct nai_realm_eap *eap;
 130 };
 131
 132
 133 static void nai_realm_free(struct nai_realm *realms, u16 count)
 134 {
 135         u16 i;
 136
 137         if (realms == NULL)
 138                 return;
 139         for (i = 0; i < count; i++) {
 140                 os_free(realms[i].eap);
 141                 os_free(realms[i].realm);
 142         }
 143         os_free(realms);
 144 }
 145
 146
 147 static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
 148                                       const u8 *end)
 149 {
 150         u8 elen, auth_count, a;
 151         const u8 *e_end;
 152
 153         if (pos + 3 > end) {
 154                 wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
 155                 return NULL;
 156         }
 157
 158         elen = *pos++;
 159         if (pos + elen > end || elen < 2) {
 160                 wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
 161                 return NULL;
 162         }
 163         e_end = pos + elen;
 164         e->method = *pos++;
 165         auth_count = *pos++;
 166         wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
 167                    elen, e->method, auth_count);
 168
 169         for (a = 0; a < auth_count; a++) {
 170                 u8 id, len;
 171
 172                 if (pos + 2 > end || pos + 2 + pos[1] > end) {
 173                         wpa_printf(MSG_DEBUG, "No room for Authentication "
 174                                    "Parameter subfield");
 175                         return NULL;
 176                 }
 177
 178                 id = *pos++;
 179                 len = *pos++;
 180
 181                 switch (id) {
 182                 case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
 183                         if (len < 1)
 184                                 break;
 185                         e->inner_non_eap = *pos;
 186                         if (e->method != EAP_TYPE_TTLS)
 187                                 break;
 188                         switch (*pos) {
 189                         case NAI_REALM_INNER_NON_EAP_PAP:
 190                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
 191                                 break;
 192                         case NAI_REALM_INNER_NON_EAP_CHAP:
 193                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
 194                                 break;
 195                         case NAI_REALM_INNER_NON_EAP_MSCHAP:
 196                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
 197                                 break;
 198                         case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 199                                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
 200                                 break;
 201                         }
 202                         break;
 203                 case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
 204                         if (len < 1)
 205                                 break;
 206                         e->inner_method = *pos;
 207                         wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
 208                                    e->inner_method);
 209                         break;
 210                 case NAI_REALM_EAP_AUTH_CRED_TYPE:
 211                         if (len < 1)
 212                                 break;
 213                         e->cred_type = *pos;
 214                         wpa_printf(MSG_DEBUG, "Credential Type: %u",
 215                                    e->cred_type);
 216                         break;
 217                 case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
 218                         if (len < 1)
 219                                 break;
 220                         e->tunneled_cred_type = *pos;
 221                         wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
 222                                    "Type: %u", e->tunneled_cred_type);
 223                         break;
 224                 default:
 225                         wpa_printf(MSG_DEBUG, "Unsupported Authentication "
 226                                    "Parameter: id=%u len=%u", id, len);
 227                         wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
 228                                     "Value", pos, len);
 229                         break;
 230                 }
 231
 232                 pos += len;
 233         }
 234
 235         return e_end;
 236 }
 237
 238
 239 static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
 240                                         const u8 *end)
 241 {
 242         u16 len;
 243         const u8 *f_end;
 244         u8 realm_len, e;
 245
 246         if (end - pos < 4) {
 247                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 248                            "fixed fields");
 249                 return NULL;
 250         }
 251
 252         len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
 253         pos += 2;
 254         if (pos + len > end || len < 3) {
 255                 wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
 256                            "(len=%u; left=%u)",
 257                            len, (unsigned int) (end - pos));
 258                 return NULL;
 259         }
 260         f_end = pos + len;
 261
 262         r->encoding = *pos++;
 263         realm_len = *pos++;
 264         if (pos + realm_len > f_end) {
 265                 wpa_printf(MSG_DEBUG, "No room for NAI Realm "
 266                            "(len=%u; left=%u)",
 267                            realm_len, (unsigned int) (f_end - pos));
 268                 return NULL;
 269         }
 270         wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
 271         r->realm = os_malloc(realm_len + 1);
 272         if (r->realm == NULL)
 273                 return NULL;
 274         os_memcpy(r->realm, pos, realm_len);
 275         r->realm[realm_len] = '\0';
 276         pos += realm_len;
 277
 278         if (pos + 1 > f_end) {
 279                 wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
 280                 return NULL;
 281         }
 282         r->eap_count = *pos++;
 283         wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
 284         if (pos + r->eap_count * 3 > f_end) {
 285                 wpa_printf(MSG_DEBUG, "No room for EAP Methods");
 286                 return NULL;
 287         }
 288         r->eap = os_zalloc(r->eap_count * sizeof(struct nai_realm_eap));
 289         if (r->eap == NULL)
 290                 return NULL;
 291
 292         for (e = 0; e < r->eap_count; e++) {
 293                 pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
 294                 if (pos == NULL)
 295                         return NULL;
 296         }
 297
 298         return f_end;
 299 }
 300
 301
 302 static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
 303 {
 304         struct nai_realm *realm;
 305         const u8 *pos, *end;
 306         u16 i, num;
 307
 308         if (anqp == NULL || wpabuf_len(anqp) < 2)
 309                 return NULL;
 310
 311         pos = wpabuf_head_u8(anqp);
 312         end = pos + wpabuf_len(anqp);
 313         num = WPA_GET_LE16(pos);
 314         wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
 315         pos += 2;
 316
 317         if (num * 5 > end - pos) {
 318                 wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
 319                            "enough data (%u octets) for that many realms",
 320                            num, (unsigned int) (end - pos));
 321                 return NULL;
 322         }
 323
 324         realm = os_zalloc(num * sizeof(struct nai_realm));
 325         if (realm == NULL)
 326                 return NULL;
 327
 328         for (i = 0; i < num; i++) {
 329                 pos = nai_realm_parse_realm(&realm[i], pos, end);
 330                 if (pos == NULL) {
 331                         nai_realm_free(realm, num);
 332                         return NULL;
 333                 }
 334         }
 335
 336         *count = num;
 337         return realm;
 338 }
 339
 340
 341 static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
 342 {
 343         char *tmp, *pos, *end;
 344         int match = 0;
 345
 346         if (realm->realm == NULL)
 347                 return 0;
 348
 349         if (os_strchr(realm->realm, ';') == NULL)
 350                 return os_strcasecmp(realm->realm, home_realm) == 0;
 351
 352         tmp = os_strdup(realm->realm);
 353         if (tmp == NULL)
 354                 return 0;
 355
 356         pos = tmp;
 357         while (*pos) {
 358                 end = os_strchr(pos, ';');
 359                 if (end)
 360                         *end = '\0';
 361                 if (os_strcasecmp(pos, home_realm) == 0) {
 362                         match = 1;
 363                         break;
 364                 }
 365                 if (end == NULL)
 366                         break;
 367                 pos = end + 1;
 368         }
 369
 370         os_free(tmp);
 371
 372         return match;
 373 }
 374
 375
 376 static int nai_realm_cred_username(struct nai_realm_eap *eap)
 377 {
 378         if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
 379                 return 0; /* method not supported */
 380
 381         if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
 382                 /* Only tunneled methods with username/password supported */
 383                 return 0;
 384         }
 385
 386         if (eap->method == EAP_TYPE_PEAP &&
 387             eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 388                 return 0;
 389
 390         if (eap->method == EAP_TYPE_TTLS) {
 391                 if (eap->inner_method == 0 && eap->inner_non_eap == 0)
 392                         return 0;
 393                 if (eap->inner_method &&
 394                     eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
 395                         return 0;
 396                 if (eap->inner_non_eap &&
 397                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
 398                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
 399                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
 400                     eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
 401                         return 0;
 402         }
 403
 404         if (eap->inner_method &&
 405             eap->inner_method != EAP_TYPE_GTC &&
 406             eap->inner_method != EAP_TYPE_MSCHAPV2)
 407                 return 0;
 408
 409         return 1;
 410 }
 411
 412
 413 struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s,
 414                                           struct nai_realm *realm)
 415 {
 416         u8 e;
 417
 418         if (wpa_s->conf->home_username == NULL ||
 419             wpa_s->conf->home_username[0] == '\0' ||
 420             wpa_s->conf->home_password == NULL ||
 421             wpa_s->conf->home_password[0] == '\0')
 422                 return NULL;
 423
 424         for (e = 0; e < realm->eap_count; e++) {
 425                 struct nai_realm_eap *eap = &realm->eap[e];
 426                 if (nai_realm_cred_username(eap))
 427                         return eap;
 428         }
 429
 430         return NULL;
 431 }
 432
 433
 434 int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 435 {
 436         struct wpa_ssid *ssid;
 437         struct nai_realm *realm;
 438         struct nai_realm_eap *eap = NULL;
 439         u16 count, i;
 440         char buf[100];
 441         const u8 *ie;
 442
 443         if (bss == NULL)
 444                 return -1;
 445         ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 446         if (ie == NULL || ie[1] == 0) {
 447                 wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
 448                            MACSTR, MAC2STR(bss->bssid));
 449                 return -1;
 450         }
 451
 452         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
 453         if (realm == NULL) {
 454                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
 455                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
 456                 nai_realm_free(realm, count);
 457                 return -1;
 458         }
 459
 460         for (i = 0; i < count; i++) {
 461                 if (!nai_realm_match(&realm[i], wpa_s->conf->home_realm))
 462                         continue;
 463                 eap = nai_realm_find_eap(wpa_s, &realm[i]);
 464                 if (eap)
 465                         break;
 466         }
 467
 468         if (!eap) {
 469                 wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
 470                            "and EAP method found for " MACSTR,
 471                            MAC2STR(bss->bssid));
 472                 nai_realm_free(realm, count);
 473                 return -1;
 474         }
 475
 476         wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
 477                    MAC2STR(bss->bssid));
 478
 479         ssid = wpa_config_add_network(wpa_s->conf);
 480         if (ssid == NULL) {
 481                 nai_realm_free(realm, count);
 482                 return -1;
 483         }
 484         wpas_notify_network_added(wpa_s, ssid);
 485         wpa_config_set_network_defaults(ssid);
 486         ssid->temporary = 1;
 487         ssid->ssid = os_zalloc(ie[1] + 1);
 488         if (ssid->ssid == NULL)
 489                 goto fail;
 490         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 491         ssid->ssid_len = ie[1];
 492
 493         if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
 494                                                      eap->method), 0) < 0)
 495                 goto fail;
 496
 497         if (wpa_s->conf->home_username && wpa_s->conf->home_username[0] &&
 498             wpa_config_set_quoted(ssid, "identity",
 499                                   wpa_s->conf->home_username) < 0)
 500                 goto fail;
 501
 502         if (wpa_s->conf->home_password && wpa_s->conf->home_password[0] &&
 503             wpa_config_set_quoted(ssid, "password", wpa_s->conf->home_password)
 504             < 0)
 505                 goto fail;
 506
 507         switch (eap->method) {
 508         case EAP_TYPE_TTLS:
 509                 if (eap->inner_method) {
 510                         os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
 511                                     eap_get_name(EAP_VENDOR_IETF,
 512                                                  eap->inner_method));
 513                         if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
 514                                 goto fail;
 515                         break;
 516                 }
 517                 switch (eap->inner_non_eap) {
 518                 case NAI_REALM_INNER_NON_EAP_PAP:
 519                         if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
 520                             0)
 521                                 goto fail;
 522                         break;
 523                 case NAI_REALM_INNER_NON_EAP_CHAP:
 524                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
 525                             < 0)
 526                                 goto fail;
 527                         break;
 528                 case NAI_REALM_INNER_NON_EAP_MSCHAP:
 529                         if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
 530                             < 0)
 531                                 goto fail;
 532                         break;
 533                 case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
 534                         if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
 535                                            0) < 0)
 536                                 goto fail;
 537                         break;
 538                 }
 539                 break;
 540         case EAP_TYPE_PEAP:
 541                 os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
 542                             eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
 543                 if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
 544                         goto fail;
 545                 break;
 546         }
 547
 548         if (wpa_s->conf->home_ca_cert && wpa_s->conf->home_ca_cert[0] &&
 549             wpa_config_set_quoted(ssid, "ca_cert", wpa_s->conf->home_ca_cert) <
 550             0)
 551                 goto fail;
 552
 553         nai_realm_free(realm, count);
 554
 555         wpa_supplicant_select_network(wpa_s, ssid);
 556
 557         return 0;
 558
 559 fail:
 560         wpas_notify_network_removed(wpa_s, ssid);
 561         wpa_config_remove_network(wpa_s->conf, ssid->id);
 562         nai_realm_free(realm, count);
 563         return -1;
 564 }
 565
 566
 567 static int interworking_credentials_available(struct wpa_supplicant *wpa_s,
 568                                               struct wpa_bss *bss)
 569 {
 570         struct nai_realm *realm;
 571         u16 count, i;
 572         int found = 0;
 573
 574         if (bss->anqp_nai_realm == NULL)
 575                 return 0;
 576
 577         if (wpa_s->conf->home_realm == NULL)
 578                 return 0;
 579
 580         wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
 581                    MACSTR, MAC2STR(bss->bssid));
 582         realm = nai_realm_parse(bss->anqp_nai_realm, &count);
 583         if (realm == NULL) {
 584                 wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
 585                            "Realm list from " MACSTR, MAC2STR(bss->bssid));
 586                 return 0;
 587         }
 588
 589         for (i = 0; i < count; i++) {
 590                 if (!nai_realm_match(&realm[i], wpa_s->conf->home_realm))
 591                         continue;
 592                 if (nai_realm_find_eap(wpa_s, &realm[i])) {
 593                         found++;
 594                         break;
 595                 }
 596         }
 597
 598         nai_realm_free(realm, count);
 599
 600         return found;
 601 }
 602
 603
 604 static void interworking_select_network(struct wpa_supplicant *wpa_s)
 605 {
 606         struct wpa_bss *bss, *selected = NULL;
 607         unsigned int count = 0;
 608
 609         wpa_s->network_select = 0;
 610
 611         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 612                 if (!interworking_credentials_available(wpa_s, bss))
 613                         continue;
 614                 count++;
 615                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR,
 616                         MAC2STR(bss->bssid));
 617                 if (selected == NULL && wpa_s->auto_select)
 618                         selected = bss;
 619         }
 620
 621         if (count == 0) {
 622                 wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
 623                         "with matching credentials found");
 624         }
 625
 626         if (selected)
 627                 interworking_connect(wpa_s, selected);
 628 }
 629
 630
 631 static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
 632 {
 633         struct wpa_bss *bss;
 634         int found = 0;
 635         const u8 *ie;
 636
 637         if (!wpa_s->fetch_anqp_in_progress)
 638                 return;
 639
 640         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 641                 if (!(bss->caps & IEEE80211_CAP_ESS))
 642                         continue;
 643                 ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
 644                 if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
 645                         continue; /* AP does not support Interworking */
 646
 647                 if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
 648                         found++;
 649                         bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
 650                         wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
 651                                 MACSTR, MAC2STR(bss->bssid));
 652                         interworking_anqp_send_req(wpa_s, bss);
 653                         break;
 654                 }
 655         }
 656
 657         if (found == 0) {
 658                 wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
 659                 wpa_s->fetch_anqp_in_progress = 0;
 660                 if (wpa_s->network_select)
 661                         interworking_select_network(wpa_s);
 662         }
 663 }
 664
 665
 666 static void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
 667 {
 668         struct wpa_bss *bss;
 669
 670         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
 671                 bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
 672
 673         wpa_s->fetch_anqp_in_progress = 1;
 674         interworking_next_anqp_fetch(wpa_s);
 675 }
 676
 677
 678 int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
 679 {
 680         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
 681                 return 0;
 682
 683         wpa_s->network_select = 0;
 684
 685         interworking_start_fetch_anqp(wpa_s);
 686
 687         return 0;
 688 }
 689
 690
 691 void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
 692 {
 693         if (!wpa_s->fetch_anqp_in_progress)
 694                 return;
 695
 696         wpa_s->fetch_anqp_in_progress = 0;
 697 }
 698
 699
 700 int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
 701                   u16 info_ids[], size_t num_ids)
 702 {
 703         struct wpabuf *buf;
 704         int ret = 0;
 705         int freq;
 706         struct wpa_bss *bss;
 707         int res;
 708
 709         freq = wpa_s->assoc_freq;
 710         bss = wpa_bss_get_bssid(wpa_s, dst);
 711         if (bss)
 712                 freq = bss->freq;
 713         if (freq <= 0)
 714                 return -1;
 715
 716         wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
 717                    MAC2STR(dst), (unsigned int) num_ids);
 718
 719         buf = anqp_build_req(info_ids, num_ids, NULL);
 720         if (buf == NULL)
 721                 return -1;
 722
 723         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
 724         if (res < 0) {
 725                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 726                 ret = -1;
 727         } else
 728                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 729                            "%u", res);
 730
 731         wpabuf_free(buf);
 732         return ret;
 733 }
 734
 735
 736 static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
 737                                             const u8 *sa, u16 info_id,
 738                                             const u8 *data, size_t slen)
 739 {
 740         const u8 *pos = data;
 741         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
 742
 743         switch (info_id) {
 744         case ANQP_CAPABILITY_LIST:
 745                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 746                         " ANQP Capability list", MAC2STR(sa));
 747                 break;
 748         case ANQP_VENUE_NAME:
 749                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 750                         " Venue Name", MAC2STR(sa));
 751                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
 752                 if (bss) {
 753                         wpabuf_free(bss->anqp_venue_name);
 754                         bss->anqp_venue_name = wpabuf_alloc_copy(pos, slen);
 755                 }
 756                 break;
 757         case ANQP_NETWORK_AUTH_TYPE:
 758                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 759                         " Network Authentication Type information",
 760                         MAC2STR(sa));
 761                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
 762                                   "Type", pos, slen);
 763                 if (bss) {
 764                         wpabuf_free(bss->anqp_network_auth_type);
 765                         bss->anqp_network_auth_type =
 766                                 wpabuf_alloc_copy(pos, slen);
 767                 }
 768                 break;
 769         case ANQP_ROAMING_CONSORTIUM:
 770                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 771                         " Roaming Consortium list", MAC2STR(sa));
 772                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
 773                                   pos, slen);
 774                 if (bss) {
 775                         wpabuf_free(bss->anqp_roaming_consortium);
 776                         bss->anqp_roaming_consortium =
 777                                 wpabuf_alloc_copy(pos, slen);
 778                 }
 779                 break;
 780         case ANQP_IP_ADDR_TYPE_AVAILABILITY:
 781                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 782                         " IP Address Type Availability information",
 783                         MAC2STR(sa));
 784                 wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
 785                             pos, slen);
 786                 if (bss) {
 787                         wpabuf_free(bss->anqp_ip_addr_type_availability);
 788                         bss->anqp_ip_addr_type_availability =
 789                                 wpabuf_alloc_copy(pos, slen);
 790                 }
 791                 break;
 792         case ANQP_NAI_REALM:
 793                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 794                         " NAI Realm list", MAC2STR(sa));
 795                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
 796                 if (bss) {
 797                         wpabuf_free(bss->anqp_nai_realm);
 798                         bss->anqp_nai_realm = wpabuf_alloc_copy(pos, slen);
 799                 }
 800                 break;
 801         case ANQP_3GPP_CELLULAR_NETWORK:
 802                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 803                         " 3GPP Cellular Network information", MAC2STR(sa));
 804                 wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
 805                                   pos, slen);
 806                 if (bss) {
 807                         wpabuf_free(bss->anqp_3gpp);
 808                         bss->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
 809                 }
 810                 break;
 811         case ANQP_DOMAIN_NAME:
 812                 wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
 813                         " Domain Name list", MAC2STR(sa));
 814                 wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
 815                 if (bss) {
 816                         wpabuf_free(bss->anqp_domain_name);
 817                         bss->anqp_domain_name = wpabuf_alloc_copy(pos, slen);
 818                 }
 819                 break;
 820         case ANQP_VENDOR_SPECIFIC:
 821                 if (slen < 3)
 822                         return;
 823
 824                 switch (WPA_GET_BE24(pos)) {
 825                 default:
 826                         wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
 827                                    "vendor-specific ANQP OUI %06x",
 828                                    WPA_GET_BE24(pos));
 829                         return;
 830                 }
 831                 break;
 832         default:
 833                 wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
 834                            "%u", info_id);
 835                 break;
 836         }
 837 }
 838
 839
 840 void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
 841                   enum gas_query_result result,
 842                   const struct wpabuf *adv_proto,
 843                   const struct wpabuf *resp, u16 status_code)
 844 {
 845         struct wpa_supplicant *wpa_s = ctx;
 846         const u8 *pos;
 847         const u8 *end;
 848         u16 info_id;
 849         u16 slen;
 850
 851         if (result != GAS_QUERY_SUCCESS)
 852                 return;
 853
 854         pos = wpabuf_head(adv_proto);
 855         if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
 856             pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
 857                 wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
 858                            "Protocol in response");
 859                 return;
 860         }
 861
 862         pos = wpabuf_head(resp);
 863         end = pos + wpabuf_len(resp);
 864
 865         while (pos < end) {
 866                 if (pos + 4 > end) {
 867                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
 868                         break;
 869                 }
 870                 info_id = WPA_GET_LE16(pos);
 871                 pos += 2;
 872                 slen = WPA_GET_LE16(pos);
 873                 pos += 2;
 874                 if (pos + slen > end) {
 875                         wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
 876                                    "for Info ID %u", info_id);
 877                         break;
 878                 }
 879                 interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
 880                                                 slen);
 881                 pos += slen;
 882         }
 883 }
 884
 885
 886 static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
 887                                           struct wpa_scan_results *scan_res)
 888 {
 889         wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
 890                    "ANQP fetch");
 891         interworking_start_fetch_anqp(wpa_s);
 892 }
 893
 894
 895 int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
 896 {
 897         interworking_stop_fetch_anqp(wpa_s);
 898         wpa_s->network_select = 1;
 899         wpa_s->auto_select = !!auto_select;
 900         wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
 901                    "selection");
 902         wpa_s->scan_res_handler = interworking_scan_res_handler;
 903         wpa_s->scan_req = 2;
 904         wpa_supplicant_req_scan(wpa_s, 0, 0);
 905
 906         return 0;
 907 }