contrib/wpa/src/ap/ieee802_1x.c

   1 /*
   2  * hostapd / IEEE 802.1X-2004 Authenticator
   3  * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "crypto/md5.h"
  14 #include "crypto/crypto.h"
  15 #include "crypto/random.h"
  16 #include "common/ieee802_11_defs.h"
  17 #include "radius/radius.h"
  18 #include "radius/radius_client.h"
  19 #include "eap_server/eap.h"
  20 #include "eap_common/eap_wsc_common.h"
  21 #include "eapol_auth/eapol_auth_sm.h"
  22 #include "eapol_auth/eapol_auth_sm_i.h"
  23 #include "p2p/p2p.h"
  24 #include "hostapd.h"
  25 #include "accounting.h"
  26 #include "sta_info.h"
  27 #include "wpa_auth.h"
  28 #include "preauth_auth.h"
  29 #include "pmksa_cache_auth.h"
  30 #include "ap_config.h"
  31 #include "ap_drv_ops.h"
  32 #include "ieee802_1x.h"
  33
  34
  35 static void ieee802_1x_finished(struct hostapd_data *hapd,
  36                                 struct sta_info *sta, int success);
  37
  38
  39 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  40                             u8 type, const u8 *data, size_t datalen)
  41 {
  42         u8 *buf;
  43         struct ieee802_1x_hdr *xhdr;
  44         size_t len;
  45         int encrypt = 0;
  46
  47         len = sizeof(*xhdr) + datalen;
  48         buf = os_zalloc(len);
  49         if (buf == NULL) {
  50                 wpa_printf(MSG_ERROR, "malloc() failed for "
  51                            "ieee802_1x_send(len=%lu)",
  52                            (unsigned long) len);
  53                 return;
  54         }
  55
  56         xhdr = (struct ieee802_1x_hdr *) buf;
  57         xhdr->version = hapd->conf->eapol_version;
  58         xhdr->type = type;
  59         xhdr->length = host_to_be16(datalen);
  60
  61         if (datalen > 0 && data != NULL)
  62                 os_memcpy(xhdr + 1, data, datalen);
  63
  64         if (wpa_auth_pairwise_set(sta->wpa_sm))
  65                 encrypt = 1;
  66         if (sta->flags & WLAN_STA_PREAUTH) {
  67                 rsn_preauth_send(hapd, sta, buf, len);
  68         } else {
  69                 hostapd_drv_hapd_send_eapol(
  70                         hapd, sta->addr, buf, len,
  71                         encrypt, hostapd_sta_flags_to_drv(sta->flags));
  72         }
  73
  74         os_free(buf);
  75 }
  76
  77
  78 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  79                                    struct sta_info *sta, int authorized)
  80 {
  81         int res;
  82
  83         if (sta->flags & WLAN_STA_PREAUTH)
  84                 return;
  85
  86         if (authorized) {
  87                 ap_sta_set_authorized(hapd, sta, 1);
  88                 res = hostapd_set_authorized(hapd, sta, 1);
  89                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  90                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  91         } else {
  92                 ap_sta_set_authorized(hapd, sta, 0);
  93                 res = hostapd_set_authorized(hapd, sta, 0);
  94                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  95                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
  96         }
  97
  98         if (res && errno != ENOENT) {
  99                 printf("Could not set station " MACSTR " flags for kernel "
 100                        "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
 101         }
 102
 103         if (authorized) {
 104                 os_get_time(&sta->connected_time);
 105                 accounting_sta_start(hapd, sta);
 106         }
 107 }
 108
 109
 110 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 111                                   struct sta_info *sta,
 112                                   int idx, int broadcast,
 113                                   u8 *key_data, size_t key_len)
 114 {
 115         u8 *buf, *ekey;
 116         struct ieee802_1x_hdr *hdr;
 117         struct ieee802_1x_eapol_key *key;
 118         size_t len, ekey_len;
 119         struct eapol_state_machine *sm = sta->eapol_sm;
 120
 121         if (sm == NULL)
 122                 return;
 123
 124         len = sizeof(*key) + key_len;
 125         buf = os_zalloc(sizeof(*hdr) + len);
 126         if (buf == NULL)
 127                 return;
 128
 129         hdr = (struct ieee802_1x_hdr *) buf;
 130         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 131         key->type = EAPOL_KEY_TYPE_RC4;
 132         WPA_PUT_BE16(key->key_length, key_len);
 133         wpa_get_ntp_timestamp(key->replay_counter);
 134
 135         if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
 136                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 137                 os_free(buf);
 138                 return;
 139         }
 140
 141         key->key_index = idx | (broadcast ? 0 : BIT(7));
 142         if (hapd->conf->eapol_key_index_workaround) {
 143                 /* According to some information, WinXP Supplicant seems to
 144                  * interpret bit7 as an indication whether the key is to be
 145                  * activated, so make it possible to enable workaround that
 146                  * sets this bit for all keys. */
 147                 key->key_index |= BIT(7);
 148         }
 149
 150         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 151          * MSK[32..63] is used to sign the message. */
 152         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 153                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 154                            "and signing EAPOL-Key");
 155                 os_free(buf);
 156                 return;
 157         }
 158         os_memcpy((u8 *) (key + 1), key_data, key_len);
 159         ekey_len = sizeof(key->key_iv) + 32;
 160         ekey = os_malloc(ekey_len);
 161         if (ekey == NULL) {
 162                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 163                 os_free(buf);
 164                 return;
 165         }
 166         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 167         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 168         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 169         os_free(ekey);
 170
 171         /* This header is needed here for HMAC-MD5, but it will be regenerated
 172          * in ieee802_1x_send() */
 173         hdr->version = hapd->conf->eapol_version;
 174         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 175         hdr->length = host_to_be16(len);
 176         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 177                  key->key_signature);
 178
 179         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 180                    " (%s index=%d)", MAC2STR(sm->addr),
 181                    broadcast ? "broadcast" : "unicast", idx);
 182         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 183         if (sta->eapol_sm)
 184                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 185         os_free(buf);
 186 }
 187
 188
 189 #ifndef CONFIG_NO_VLAN
 190 static struct hostapd_wep_keys *
 191 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
 192 {
 193         struct hostapd_wep_keys *key;
 194
 195         key = os_zalloc(sizeof(*key));
 196         if (key == NULL)
 197                 return NULL;
 198
 199         key->default_len = hapd->conf->default_wep_key_len;
 200
 201         if (key->idx >= hapd->conf->broadcast_key_idx_max ||
 202             key->idx < hapd->conf->broadcast_key_idx_min)
 203                 key->idx = hapd->conf->broadcast_key_idx_min;
 204         else
 205                 key->idx++;
 206
 207         if (!key->key[key->idx])
 208                 key->key[key->idx] = os_malloc(key->default_len);
 209         if (key->key[key->idx] == NULL ||
 210             random_get_bytes(key->key[key->idx], key->default_len)) {
 211                 printf("Could not generate random WEP key (dynamic VLAN).\n");
 212                 os_free(key->key[key->idx]);
 213                 key->key[key->idx] = NULL;
 214                 os_free(key);
 215                 return NULL;
 216         }
 217         key->len[key->idx] = key->default_len;
 218
 219         wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
 220                    ifname, key->idx);
 221         wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
 222                         key->key[key->idx], key->len[key->idx]);
 223
 224         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
 225                                 broadcast_ether_addr, key->idx, 1,
 226                                 NULL, 0, key->key[key->idx],
 227                                 key->len[key->idx]))
 228                 printf("Could not set dynamic VLAN WEP encryption key.\n");
 229
 230         hostapd_set_drv_ieee8021x(hapd, ifname, 1);
 231
 232         return key;
 233 }
 234
 235
 236 static struct hostapd_wep_keys *
 237 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
 238                      size_t vlan_id)
 239 {
 240         const char *ifname;
 241
 242         if (vlan_id == 0)
 243                 return &ssid->wep;
 244
 245         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
 246             ssid->dyn_vlan_keys[vlan_id])
 247                 return ssid->dyn_vlan_keys[vlan_id];
 248
 249         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
 250                    "state machine for VLAN ID %lu",
 251                    (unsigned long) vlan_id);
 252
 253         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 254         if (ifname == NULL) {
 255                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
 256                            "cannot create group key state machine",
 257                            (unsigned long) vlan_id);
 258                 return NULL;
 259         }
 260
 261         if (ssid->dyn_vlan_keys == NULL) {
 262                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 263                 ssid->dyn_vlan_keys = os_zalloc(size);
 264                 if (ssid->dyn_vlan_keys == NULL)
 265                         return NULL;
 266                 ssid->max_dyn_vlan_keys = vlan_id;
 267         }
 268
 269         if (ssid->max_dyn_vlan_keys < vlan_id) {
 270                 struct hostapd_wep_keys **na;
 271                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 272                 na = os_realloc(ssid->dyn_vlan_keys, size);
 273                 if (na == NULL)
 274                         return NULL;
 275                 ssid->dyn_vlan_keys = na;
 276                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
 277                           (vlan_id - ssid->max_dyn_vlan_keys) *
 278                           sizeof(ssid->dyn_vlan_keys[0]));
 279                 ssid->max_dyn_vlan_keys = vlan_id;
 280         }
 281
 282         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
 283
 284         return ssid->dyn_vlan_keys[vlan_id];
 285 }
 286 #endif /* CONFIG_NO_VLAN */
 287
 288
 289 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 290 {
 291         struct eapol_authenticator *eapol = hapd->eapol_auth;
 292         struct eapol_state_machine *sm = sta->eapol_sm;
 293 #ifndef CONFIG_NO_VLAN
 294         struct hostapd_wep_keys *key = NULL;
 295         int vlan_id;
 296 #endif /* CONFIG_NO_VLAN */
 297
 298         if (sm == NULL || !sm->eap_if->eapKeyData)
 299                 return;
 300
 301         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 302                    MAC2STR(sta->addr));
 303
 304 #ifndef CONFIG_NO_VLAN
 305         vlan_id = sta->vlan_id;
 306         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
 307                 vlan_id = 0;
 308
 309         if (vlan_id) {
 310                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
 311                 if (key && key->key[key->idx])
 312                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
 313                                               key->key[key->idx],
 314                                               key->len[key->idx]);
 315         } else
 316 #endif /* CONFIG_NO_VLAN */
 317         if (eapol->default_wep_key) {
 318                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 319                                       eapol->default_wep_key,
 320                                       hapd->conf->default_wep_key_len);
 321         }
 322
 323         if (hapd->conf->individual_wep_key_len > 0) {
 324                 u8 *ikey;
 325                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 326                 if (ikey == NULL ||
 327                     random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
 328                 {
 329                         wpa_printf(MSG_ERROR, "Could not generate random "
 330                                    "individual WEP key.");
 331                         os_free(ikey);
 332                         return;
 333                 }
 334
 335                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 336                                 ikey, hapd->conf->individual_wep_key_len);
 337
 338                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 339                                       hapd->conf->individual_wep_key_len);
 340
 341                 /* TODO: set encryption in TX callback, i.e., only after STA
 342                  * has ACKed EAPOL-Key frame */
 343                 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 344                                         sta->addr, 0, 1, NULL, 0, ikey,
 345                                         hapd->conf->individual_wep_key_len)) {
 346                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 347                                    "encryption.");
 348                 }
 349
 350                 os_free(ikey);
 351         }
 352 }
 353
 354
 355 const char *radius_mode_txt(struct hostapd_data *hapd)
 356 {
 357         switch (hapd->iface->conf->hw_mode) {
 358         case HOSTAPD_MODE_IEEE80211AD:
 359                 return "802.11ad";
 360         case HOSTAPD_MODE_IEEE80211A:
 361                 return "802.11a";
 362         case HOSTAPD_MODE_IEEE80211G:
 363                 return "802.11g";
 364         case HOSTAPD_MODE_IEEE80211B:
 365         default:
 366                 return "802.11b";
 367         }
 368 }
 369
 370
 371 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 372 {
 373         int i;
 374         u8 rate = 0;
 375
 376         for (i = 0; i < sta->supported_rates_len; i++)
 377                 if ((sta->supported_rates[i] & 0x7f) > rate)
 378                         rate = sta->supported_rates[i] & 0x7f;
 379
 380         return rate;
 381 }
 382
 383
 384 #ifndef CONFIG_NO_RADIUS
 385 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 386                                       struct eapol_state_machine *sm,
 387                                       const u8 *eap, size_t len)
 388 {
 389         const u8 *identity;
 390         size_t identity_len;
 391
 392         if (len <= sizeof(struct eap_hdr) ||
 393             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 394                 return;
 395
 396         identity = eap_get_identity(sm->eap, &identity_len);
 397         if (identity == NULL)
 398                 return;
 399
 400         /* Save station identity for future RADIUS packets */
 401         os_free(sm->identity);
 402         sm->identity = os_malloc(identity_len + 1);
 403         if (sm->identity == NULL) {
 404                 sm->identity_len = 0;
 405                 return;
 406         }
 407
 408         os_memcpy(sm->identity, identity, identity_len);
 409         sm->identity_len = identity_len;
 410         sm->identity[identity_len] = '\0';
 411         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 412                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 413         sm->dot1xAuthEapolRespIdFramesRx++;
 414 }
 415
 416
 417 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
 418                                       struct hostapd_radius_attr *req_attr,
 419                                       struct sta_info *sta,
 420                                       struct radius_msg *msg)
 421 {
 422         char buf[128];
 423
 424         if (!hostapd_config_get_radius_attr(req_attr,
 425                                             RADIUS_ATTR_NAS_PORT) &&
 426             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 427                 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
 428                 return -1;
 429         }
 430
 431         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 432                     MAC2STR(sta->addr));
 433         buf[sizeof(buf) - 1] = '\0';
 434         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 435                                  (u8 *) buf, os_strlen(buf))) {
 436                 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
 437                 return -1;
 438         }
 439
 440         if (sta->flags & WLAN_STA_PREAUTH) {
 441                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 442                            sizeof(buf));
 443         } else {
 444                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 445                             radius_sta_rate(hapd, sta) / 2,
 446                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 447                             radius_mode_txt(hapd));
 448                 buf[sizeof(buf) - 1] = '\0';
 449         }
 450         if (!hostapd_config_get_radius_attr(req_attr,
 451                                             RADIUS_ATTR_CONNECT_INFO) &&
 452             !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 453                                  (u8 *) buf, os_strlen(buf))) {
 454                 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
 455                 return -1;
 456         }
 457
 458         if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
 459                 os_snprintf(buf, sizeof(buf), "%08X-%08X",
 460                             sta->acct_session_id_hi, sta->acct_session_id_lo);
 461                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
 462                                          (u8 *) buf, os_strlen(buf))) {
 463                         wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
 464                         return -1;
 465                 }
 466         }
 467
 468         return 0;
 469 }
 470
 471
 472 int add_common_radius_attr(struct hostapd_data *hapd,
 473                            struct hostapd_radius_attr *req_attr,
 474                            struct sta_info *sta,
 475                            struct radius_msg *msg)
 476 {
 477         char buf[128];
 478         struct hostapd_radius_attr *attr;
 479
 480         if (!hostapd_config_get_radius_attr(req_attr,
 481                                             RADIUS_ATTR_NAS_IP_ADDRESS) &&
 482             hapd->conf->own_ip_addr.af == AF_INET &&
 483             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 484                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 485                 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
 486                 return -1;
 487         }
 488
 489 #ifdef CONFIG_IPV6
 490         if (!hostapd_config_get_radius_attr(req_attr,
 491                                             RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
 492             hapd->conf->own_ip_addr.af == AF_INET6 &&
 493             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 494                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 495                 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
 496                 return -1;
 497         }
 498 #endif /* CONFIG_IPV6 */
 499
 500         if (!hostapd_config_get_radius_attr(req_attr,
 501                                             RADIUS_ATTR_NAS_IDENTIFIER) &&
 502             hapd->conf->nas_identifier &&
 503             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 504                                  (u8 *) hapd->conf->nas_identifier,
 505                                  os_strlen(hapd->conf->nas_identifier))) {
 506                 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
 507                 return -1;
 508         }
 509
 510         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 511                     MAC2STR(hapd->own_addr),
 512                     wpa_ssid_txt(hapd->conf->ssid.ssid,
 513                                  hapd->conf->ssid.ssid_len));
 514         buf[sizeof(buf) - 1] = '\0';
 515         if (!hostapd_config_get_radius_attr(req_attr,
 516                                             RADIUS_ATTR_CALLED_STATION_ID) &&
 517             !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 518                                  (u8 *) buf, os_strlen(buf))) {
 519                 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
 520                 return -1;
 521         }
 522
 523         if (!hostapd_config_get_radius_attr(req_attr,
 524                                             RADIUS_ATTR_NAS_PORT_TYPE) &&
 525             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 526                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 527                 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
 528                 return -1;
 529         }
 530
 531         if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
 532                 return -1;
 533
 534         for (attr = req_attr; attr; attr = attr->next) {
 535                 if (!radius_msg_add_attr(msg, attr->type,
 536                                          wpabuf_head(attr->val),
 537                                          wpabuf_len(attr->val))) {
 538                         wpa_printf(MSG_ERROR, "Could not add RADIUS "
 539                                    "attribute");
 540                         return -1;
 541                 }
 542         }
 543
 544         return 0;
 545 }
 546
 547
 548 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 549                                           struct sta_info *sta,
 550                                           const u8 *eap, size_t len)
 551 {
 552         struct radius_msg *msg;
 553         struct eapol_state_machine *sm = sta->eapol_sm;
 554
 555         if (sm == NULL)
 556                 return;
 557
 558         ieee802_1x_learn_identity(hapd, sm, eap, len);
 559
 560         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 561                    "packet");
 562
 563         sm->radius_identifier = radius_client_get_id(hapd->radius);
 564         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 565                              sm->radius_identifier);
 566         if (msg == NULL) {
 567                 printf("Could not create net RADIUS packet\n");
 568                 return;
 569         }
 570
 571         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 572
 573         if (sm->identity &&
 574             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 575                                  sm->identity, sm->identity_len)) {
 576                 printf("Could not add User-Name\n");
 577                 goto fail;
 578         }
 579
 580         if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
 581                                    msg) < 0)
 582                 goto fail;
 583
 584         /* TODO: should probably check MTU from driver config; 2304 is max for
 585          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 586          */
 587         if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
 588                                             RADIUS_ATTR_FRAMED_MTU) &&
 589             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 590                 printf("Could not add Framed-MTU\n");
 591                 goto fail;
 592         }
 593
 594         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 595                 printf("Could not add EAP-Message\n");
 596                 goto fail;
 597         }
 598
 599         /* State attribute must be copied if and only if this packet is
 600          * Access-Request reply to the previous Access-Challenge */
 601         if (sm->last_recv_radius &&
 602             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 603             RADIUS_CODE_ACCESS_CHALLENGE) {
 604                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 605                                                RADIUS_ATTR_STATE);
 606                 if (res < 0) {
 607                         printf("Could not copy State attribute from previous "
 608                                "Access-Challenge\n");
 609                         goto fail;
 610                 }
 611                 if (res > 0) {
 612                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 613                 }
 614         }
 615
 616         if (hapd->conf->radius_request_cui) {
 617                 const u8 *cui;
 618                 size_t cui_len;
 619                 /* Add previously learned CUI or nul CUI to request CUI */
 620                 if (sm->radius_cui) {
 621                         cui = wpabuf_head(sm->radius_cui);
 622                         cui_len = wpabuf_len(sm->radius_cui);
 623                 } else {
 624                         cui = (const u8 *) "\0";
 625                         cui_len = 1;
 626                 }
 627                 if (!radius_msg_add_attr(msg,
 628                                          RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
 629                                          cui, cui_len)) {
 630                         wpa_printf(MSG_ERROR, "Could not add CUI");
 631                         goto fail;
 632                 }
 633         }
 634
 635         if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
 636                 goto fail;
 637
 638         return;
 639
 640  fail:
 641         radius_msg_free(msg);
 642 }
 643 #endif /* CONFIG_NO_RADIUS */
 644
 645
 646 static void handle_eap_response(struct hostapd_data *hapd,
 647                                 struct sta_info *sta, struct eap_hdr *eap,
 648                                 size_t len)
 649 {
 650         u8 type, *data;
 651         struct eapol_state_machine *sm = sta->eapol_sm;
 652         if (sm == NULL)
 653                 return;
 654
 655         data = (u8 *) (eap + 1);
 656
 657         if (len < sizeof(*eap) + 1) {
 658                 printf("handle_eap_response: too short response data\n");
 659                 return;
 660         }
 661
 662         sm->eap_type_supp = type = data[0];
 663
 664         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 665                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 666                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 667                        eap->code, eap->identifier, be_to_host16(eap->length),
 668                        eap_server_get_name(0, type), type);
 669
 670         sm->dot1xAuthEapolRespFramesRx++;
 671
 672         wpabuf_free(sm->eap_if->eapRespData);
 673         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 674         sm->eapolEap = TRUE;
 675 }
 676
 677
 678 /* Process incoming EAP packet from Supplicant */
 679 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 680                        u8 *buf, size_t len)
 681 {
 682         struct eap_hdr *eap;
 683         u16 eap_len;
 684
 685         if (len < sizeof(*eap)) {
 686                 printf("   too short EAP packet\n");
 687                 return;
 688         }
 689
 690         eap = (struct eap_hdr *) buf;
 691
 692         eap_len = be_to_host16(eap->length);
 693         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 694                    eap->code, eap->identifier, eap_len);
 695         if (eap_len < sizeof(*eap)) {
 696                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 697                 return;
 698         } else if (eap_len > len) {
 699                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 700                            "packet");
 701                 return;
 702         } else if (eap_len < len) {
 703                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 704                            "packet", (unsigned long) len - eap_len);
 705         }
 706
 707         switch (eap->code) {
 708         case EAP_CODE_REQUEST:
 709                 wpa_printf(MSG_DEBUG, " (request)");
 710                 return;
 711         case EAP_CODE_RESPONSE:
 712                 wpa_printf(MSG_DEBUG, " (response)");
 713                 handle_eap_response(hapd, sta, eap, eap_len);
 714                 break;
 715         case EAP_CODE_SUCCESS:
 716                 wpa_printf(MSG_DEBUG, " (success)");
 717                 return;
 718         case EAP_CODE_FAILURE:
 719                 wpa_printf(MSG_DEBUG, " (failure)");
 720                 return;
 721         default:
 722                 wpa_printf(MSG_DEBUG, " (unknown code)");
 723                 return;
 724         }
 725 }
 726
 727
 728 static struct eapol_state_machine *
 729 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 730 {
 731         int flags = 0;
 732         if (sta->flags & WLAN_STA_PREAUTH)
 733                 flags |= EAPOL_SM_PREAUTH;
 734         if (sta->wpa_sm) {
 735                 flags |= EAPOL_SM_USES_WPA;
 736                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 737                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 738         }
 739         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 740                                 sta->wps_ie, sta->p2p_ie, sta,
 741                                 sta->identity, sta->radius_cui);
 742 }
 743
 744
 745 /**
 746  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 747  * @hapd: hostapd BSS data
 748  * @sa: Source address (sender of the EAPOL frame)
 749  * @buf: EAPOL frame
 750  * @len: Length of buf in octets
 751  *
 752  * This function is called for each incoming EAPOL frame from the interface
 753  */
 754 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 755                         size_t len)
 756 {
 757         struct sta_info *sta;
 758         struct ieee802_1x_hdr *hdr;
 759         struct ieee802_1x_eapol_key *key;
 760         u16 datalen;
 761         struct rsn_pmksa_cache_entry *pmksa;
 762         int key_mgmt;
 763
 764         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 765             !hapd->conf->wps_state)
 766                 return;
 767
 768         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 769                    (unsigned long) len, MAC2STR(sa));
 770         sta = ap_get_sta(hapd, sa);
 771         if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
 772                      !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
 773                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 774                            "associated/Pre-authenticating STA");
 775                 return;
 776         }
 777
 778         if (len < sizeof(*hdr)) {
 779                 printf("   too short IEEE 802.1X packet\n");
 780                 return;
 781         }
 782
 783         hdr = (struct ieee802_1x_hdr *) buf;
 784         datalen = be_to_host16(hdr->length);
 785         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 786                    hdr->version, hdr->type, datalen);
 787
 788         if (len - sizeof(*hdr) < datalen) {
 789                 printf("   frame too short for this IEEE 802.1X packet\n");
 790                 if (sta->eapol_sm)
 791                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 792                 return;
 793         }
 794         if (len - sizeof(*hdr) > datalen) {
 795                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 796                            "IEEE 802.1X packet",
 797                            (unsigned long) len - sizeof(*hdr) - datalen);
 798         }
 799
 800         if (sta->eapol_sm) {
 801                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 802                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 803         }
 804
 805         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 806         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 807             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 808             (key->type == EAPOL_KEY_TYPE_WPA ||
 809              key->type == EAPOL_KEY_TYPE_RSN)) {
 810                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 811                             sizeof(*hdr) + datalen);
 812                 return;
 813         }
 814
 815         if (!hapd->conf->ieee802_1x &&
 816             !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 817                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 818                            "802.1X not enabled and WPS not used");
 819                 return;
 820         }
 821
 822         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 823         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 824                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 825                            "STA is using PSK");
 826                 return;
 827         }
 828
 829         if (!sta->eapol_sm) {
 830                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 831                 if (!sta->eapol_sm)
 832                         return;
 833
 834 #ifdef CONFIG_WPS
 835                 if (!hapd->conf->ieee802_1x) {
 836                         u32 wflags = sta->flags & (WLAN_STA_WPS |
 837                                                    WLAN_STA_WPS2 |
 838                                                    WLAN_STA_MAYBE_WPS);
 839                         if (wflags == WLAN_STA_MAYBE_WPS ||
 840                             wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
 841                                 /*
 842                                  * Delay EAPOL frame transmission until a
 843                                  * possible WPS STA initiates the handshake
 844                                  * with EAPOL-Start. Only allow the wait to be
 845                                  * skipped if the STA is known to support WPS
 846                                  * 2.0.
 847                                  */
 848                                 wpa_printf(MSG_DEBUG, "WPS: Do not start "
 849                                            "EAPOL until EAPOL-Start is "
 850                                            "received");
 851                                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 852                         }
 853                 }
 854 #endif /* CONFIG_WPS */
 855
 856                 sta->eapol_sm->eap_if->portEnabled = TRUE;
 857         }
 858
 859         /* since we support version 1, we can ignore version field and proceed
 860          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 861         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 862          * does not change frame contents, so should be ok to process frames
 863          * more or less identically. Some changes might be needed for
 864          * verification of fields. */
 865
 866         switch (hdr->type) {
 867         case IEEE802_1X_TYPE_EAP_PACKET:
 868                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 869                 break;
 870
 871         case IEEE802_1X_TYPE_EAPOL_START:
 872                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 873                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 874                                "from STA");
 875                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 876                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 877                 if (pmksa) {
 878                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 879                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 880                                        "available - ignore it since "
 881                                        "STA sent EAPOL-Start");
 882                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 883                 }
 884                 sta->eapol_sm->eapolStart = TRUE;
 885                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 886                 eap_server_clear_identity(sta->eapol_sm->eap);
 887                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 888                 break;
 889
 890         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 891                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 892                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 893                                "from STA");
 894                 sta->acct_terminate_cause =
 895                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 896                 accounting_sta_stop(hapd, sta);
 897                 sta->eapol_sm->eapolLogoff = TRUE;
 898                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 899                 eap_server_clear_identity(sta->eapol_sm->eap);
 900                 break;
 901
 902         case IEEE802_1X_TYPE_EAPOL_KEY:
 903                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 904                 if (!ap_sta_is_authorized(sta)) {
 905                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 906                                    "unauthorized Supplicant");
 907                         break;
 908                 }
 909                 break;
 910
 911         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 912                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 913                 /* TODO: implement support for this; show data */
 914                 break;
 915
 916         default:
 917                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 918                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 919                 break;
 920         }
 921
 922         eapol_auth_step(sta->eapol_sm);
 923 }
 924
 925
 926 /**
 927  * ieee802_1x_new_station - Start IEEE 802.1X authentication
 928  * @hapd: hostapd BSS data
 929  * @sta: The station
 930  *
 931  * This function is called to start IEEE 802.1X authentication when a new
 932  * station completes IEEE 802.11 association.
 933  */
 934 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 935 {
 936         struct rsn_pmksa_cache_entry *pmksa;
 937         int reassoc = 1;
 938         int force_1x = 0;
 939         int key_mgmt;
 940
 941 #ifdef CONFIG_WPS
 942         if (hapd->conf->wps_state && hapd->conf->wpa &&
 943             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 944                 /*
 945                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 946                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 947                  * authentication in this BSS.
 948                  */
 949                 force_1x = 1;
 950         }
 951 #endif /* CONFIG_WPS */
 952
 953         if (!force_1x && !hapd->conf->ieee802_1x) {
 954                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
 955                            "802.1X not enabled or forced for WPS");
 956                 /*
 957                  * Clear any possible EAPOL authenticator state to support
 958                  * reassociation change from WPS to PSK.
 959                  */
 960                 ieee802_1x_free_station(sta);
 961                 return;
 962         }
 963
 964         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 965         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 966                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
 967                 /*
 968                  * Clear any possible EAPOL authenticator state to support
 969                  * reassociation change from WPA-EAP to PSK.
 970                  */
 971                 ieee802_1x_free_station(sta);
 972                 return;
 973         }
 974
 975         if (sta->eapol_sm == NULL) {
 976                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 977                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 978                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 979                 if (sta->eapol_sm == NULL) {
 980                         hostapd_logger(hapd, sta->addr,
 981                                        HOSTAPD_MODULE_IEEE8021X,
 982                                        HOSTAPD_LEVEL_INFO,
 983                                        "failed to allocate state machine");
 984                         return;
 985                 }
 986                 reassoc = 0;
 987         }
 988
 989 #ifdef CONFIG_WPS
 990         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 991         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS2)) {
 992                 /*
 993                  * Delay EAPOL frame transmission until a possible WPS STA
 994                  * initiates the handshake with EAPOL-Start. Only allow the
 995                  * wait to be skipped if the STA is known to support WPS 2.0.
 996                  */
 997                 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
 998                            "EAPOL-Start is received");
 999                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1000         }
1001 #endif /* CONFIG_WPS */
1002
1003         sta->eapol_sm->eap_if->portEnabled = TRUE;
1004
1005 #ifdef CONFIG_IEEE80211R
1006         if (sta->auth_alg == WLAN_AUTH_FT) {
1007                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1008                                HOSTAPD_LEVEL_DEBUG,
1009                                "PMK from FT - skip IEEE 802.1X/EAP");
1010                 /* Setup EAPOL state machines to already authenticated state
1011                  * because of existing FT information from R0KH. */
1012                 sta->eapol_sm->keyRun = TRUE;
1013                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1014                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1015                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1016                 sta->eapol_sm->authSuccess = TRUE;
1017                 sta->eapol_sm->authFail = FALSE;
1018                 if (sta->eapol_sm->eap)
1019                         eap_sm_notify_cached(sta->eapol_sm->eap);
1020                 /* TODO: get vlan_id from R0KH using RRB message */
1021                 return;
1022         }
1023 #endif /* CONFIG_IEEE80211R */
1024
1025         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1026         if (pmksa) {
1027                 int old_vlanid;
1028
1029                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1030                                HOSTAPD_LEVEL_DEBUG,
1031                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1032                 /* Setup EAPOL state machines to already authenticated state
1033                  * because of existing PMKSA information in the cache. */
1034                 sta->eapol_sm->keyRun = TRUE;
1035                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1036                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1037                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1038                 sta->eapol_sm->authSuccess = TRUE;
1039                 sta->eapol_sm->authFail = FALSE;
1040                 if (sta->eapol_sm->eap)
1041                         eap_sm_notify_cached(sta->eapol_sm->eap);
1042                 old_vlanid = sta->vlan_id;
1043                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
1044                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1045                         sta->vlan_id = 0;
1046                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1047         } else {
1048                 if (reassoc) {
1049                         /*
1050                          * Force EAPOL state machines to start
1051                          * re-authentication without having to wait for the
1052                          * Supplicant to send EAPOL-Start.
1053                          */
1054                         sta->eapol_sm->reAuthenticate = TRUE;
1055                 }
1056                 eapol_auth_step(sta->eapol_sm);
1057         }
1058 }
1059
1060
1061 void ieee802_1x_free_station(struct sta_info *sta)
1062 {
1063         struct eapol_state_machine *sm = sta->eapol_sm;
1064
1065         if (sm == NULL)
1066                 return;
1067
1068         sta->eapol_sm = NULL;
1069
1070 #ifndef CONFIG_NO_RADIUS
1071         radius_msg_free(sm->last_recv_radius);
1072         radius_free_class(&sm->radius_class);
1073         wpabuf_free(sm->radius_cui);
1074 #endif /* CONFIG_NO_RADIUS */
1075
1076         os_free(sm->identity);
1077         eapol_auth_free(sm);
1078 }
1079
1080
1081 #ifndef CONFIG_NO_RADIUS
1082 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1083                                           struct sta_info *sta)
1084 {
1085         struct wpabuf *eap;
1086         const struct eap_hdr *hdr;
1087         int eap_type = -1;
1088         char buf[64];
1089         struct radius_msg *msg;
1090         struct eapol_state_machine *sm = sta->eapol_sm;
1091
1092         if (sm == NULL || sm->last_recv_radius == NULL) {
1093                 if (sm)
1094                         sm->eap_if->aaaEapNoReq = TRUE;
1095                 return;
1096         }
1097
1098         msg = sm->last_recv_radius;
1099
1100         eap = radius_msg_get_eap(msg);
1101         if (eap == NULL) {
1102                 /* RFC 3579, Chap. 2.6.3:
1103                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1104                  * attribute */
1105                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1106                                HOSTAPD_LEVEL_WARNING, "could not extract "
1107                                "EAP-Message from RADIUS message");
1108                 sm->eap_if->aaaEapNoReq = TRUE;
1109                 return;
1110         }
1111
1112         if (wpabuf_len(eap) < sizeof(*hdr)) {
1113                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1114                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1115                                "received from authentication server");
1116                 wpabuf_free(eap);
1117                 sm->eap_if->aaaEapNoReq = TRUE;
1118                 return;
1119         }
1120
1121         if (wpabuf_len(eap) > sizeof(*hdr))
1122                 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1123
1124         hdr = wpabuf_head(eap);
1125         switch (hdr->code) {
1126         case EAP_CODE_REQUEST:
1127                 if (eap_type >= 0)
1128                         sm->eap_type_authsrv = eap_type;
1129                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1130                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1131                             "??",
1132                             eap_type);
1133                 break;
1134         case EAP_CODE_RESPONSE:
1135                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1136                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1137                             "??",
1138                             eap_type);
1139                 break;
1140         case EAP_CODE_SUCCESS:
1141                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1142                 break;
1143         case EAP_CODE_FAILURE:
1144                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1145                 break;
1146         default:
1147                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1148                 break;
1149         }
1150         buf[sizeof(buf) - 1] = '\0';
1151         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1152                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1153                        "id=%d len=%d) from RADIUS server: %s",
1154                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1155                        buf);
1156         sm->eap_if->aaaEapReq = TRUE;
1157
1158         wpabuf_free(sm->eap_if->aaaEapReqData);
1159         sm->eap_if->aaaEapReqData = eap;
1160 }
1161
1162
1163 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1164                                 struct sta_info *sta, struct radius_msg *msg,
1165                                 struct radius_msg *req,
1166                                 const u8 *shared_secret,
1167                                 size_t shared_secret_len)
1168 {
1169         struct radius_ms_mppe_keys *keys;
1170         struct eapol_state_machine *sm = sta->eapol_sm;
1171         if (sm == NULL)
1172                 return;
1173
1174         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1175                                       shared_secret_len);
1176
1177         if (keys && keys->send && keys->recv) {
1178                 size_t len = keys->send_len + keys->recv_len;
1179                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1180                                 keys->send, keys->send_len);
1181                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1182                                 keys->recv, keys->recv_len);
1183
1184                 os_free(sm->eap_if->aaaEapKeyData);
1185                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1186                 if (sm->eap_if->aaaEapKeyData) {
1187                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1188                                   keys->recv_len);
1189                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1190                                   keys->send, keys->send_len);
1191                         sm->eap_if->aaaEapKeyDataLen = len;
1192                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1193                 }
1194         }
1195
1196         if (keys) {
1197                 os_free(keys->send);
1198                 os_free(keys->recv);
1199                 os_free(keys);
1200         }
1201 }
1202
1203
1204 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1205                                           struct sta_info *sta,
1206                                           struct radius_msg *msg)
1207 {
1208         u8 *class;
1209         size_t class_len;
1210         struct eapol_state_machine *sm = sta->eapol_sm;
1211         int count, i;
1212         struct radius_attr_data *nclass;
1213         size_t nclass_count;
1214
1215         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1216             sm == NULL)
1217                 return;
1218
1219         radius_free_class(&sm->radius_class);
1220         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1221         if (count <= 0)
1222                 return;
1223
1224         nclass = os_calloc(count, sizeof(struct radius_attr_data));
1225         if (nclass == NULL)
1226                 return;
1227
1228         nclass_count = 0;
1229
1230         class = NULL;
1231         for (i = 0; i < count; i++) {
1232                 do {
1233                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1234                                                     &class, &class_len,
1235                                                     class) < 0) {
1236                                 i = count;
1237                                 break;
1238                         }
1239                 } while (class_len < 1);
1240
1241                 nclass[nclass_count].data = os_malloc(class_len);
1242                 if (nclass[nclass_count].data == NULL)
1243                         break;
1244
1245                 os_memcpy(nclass[nclass_count].data, class, class_len);
1246                 nclass[nclass_count].len = class_len;
1247                 nclass_count++;
1248         }
1249
1250         sm->radius_class.attr = nclass;
1251         sm->radius_class.count = nclass_count;
1252         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1253                    "attributes for " MACSTR,
1254                    (unsigned long) sm->radius_class.count,
1255                    MAC2STR(sta->addr));
1256 }
1257
1258
1259 /* Update sta->identity based on User-Name attribute in Access-Accept */
1260 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1261                                            struct sta_info *sta,
1262                                            struct radius_msg *msg)
1263 {
1264         u8 *buf, *identity;
1265         size_t len;
1266         struct eapol_state_machine *sm = sta->eapol_sm;
1267
1268         if (sm == NULL)
1269                 return;
1270
1271         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1272                                     NULL) < 0)
1273                 return;
1274
1275         identity = os_malloc(len + 1);
1276         if (identity == NULL)
1277                 return;
1278
1279         os_memcpy(identity, buf, len);
1280         identity[len] = '\0';
1281
1282         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1283                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1284                        "User-Name from Access-Accept '%s'",
1285                        sm->identity ? (char *) sm->identity : "N/A",
1286                        (char *) identity);
1287
1288         os_free(sm->identity);
1289         sm->identity = identity;
1290         sm->identity_len = len;
1291 }
1292
1293
1294 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1295 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1296                                       struct sta_info *sta,
1297                                       struct radius_msg *msg)
1298 {
1299         struct eapol_state_machine *sm = sta->eapol_sm;
1300         struct wpabuf *cui;
1301         u8 *buf;
1302         size_t len;
1303
1304         if (sm == NULL)
1305                 return;
1306
1307         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1308                                     &buf, &len, NULL) < 0)
1309                 return;
1310
1311         cui = wpabuf_alloc_copy(buf, len);
1312         if (cui == NULL)
1313                 return;
1314
1315         wpabuf_free(sm->radius_cui);
1316         sm->radius_cui = cui;
1317 }
1318
1319
1320 struct sta_id_search {
1321         u8 identifier;
1322         struct eapol_state_machine *sm;
1323 };
1324
1325
1326 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1327                                                struct sta_info *sta,
1328                                                void *ctx)
1329 {
1330         struct sta_id_search *id_search = ctx;
1331         struct eapol_state_machine *sm = sta->eapol_sm;
1332
1333         if (sm && sm->radius_identifier >= 0 &&
1334             sm->radius_identifier == id_search->identifier) {
1335                 id_search->sm = sm;
1336                 return 1;
1337         }
1338         return 0;
1339 }
1340
1341
1342 static struct eapol_state_machine *
1343 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1344 {
1345         struct sta_id_search id_search;
1346         id_search.identifier = identifier;
1347         id_search.sm = NULL;
1348         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1349         return id_search.sm;
1350 }
1351
1352
1353 /**
1354  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1355  * @msg: RADIUS response message
1356  * @req: RADIUS request message
1357  * @shared_secret: RADIUS shared secret
1358  * @shared_secret_len: Length of shared_secret in octets
1359  * @data: Context data (struct hostapd_data *)
1360  * Returns: Processing status
1361  */
1362 static RadiusRxResult
1363 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1364                         const u8 *shared_secret, size_t shared_secret_len,
1365                         void *data)
1366 {
1367         struct hostapd_data *hapd = data;
1368         struct sta_info *sta;
1369         u32 session_timeout = 0, termination_action, acct_interim_interval;
1370         int session_timeout_set, old_vlanid = 0;
1371         struct eapol_state_machine *sm;
1372         int override_eapReq = 0;
1373         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1374
1375         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1376         if (sm == NULL) {
1377                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1378                            "station for this RADIUS message");
1379                 return RADIUS_RX_UNKNOWN;
1380         }
1381         sta = sm->sta;
1382
1383         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1384          * present when packet contains an EAP-Message attribute */
1385         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1386             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1387                                 0) < 0 &&
1388             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1389                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1390                            "Message-Authenticator since it does not include "
1391                            "EAP-Message");
1392         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1393                                      req, 1)) {
1394                 printf("Incoming RADIUS packet did not have correct "
1395                        "Message-Authenticator - dropped\n");
1396                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1397         }
1398
1399         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1400             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1401             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1402                 printf("Unknown RADIUS message code\n");
1403                 return RADIUS_RX_UNKNOWN;
1404         }
1405
1406         sm->radius_identifier = -1;
1407         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1408                    MAC2STR(sta->addr));
1409
1410         radius_msg_free(sm->last_recv_radius);
1411         sm->last_recv_radius = msg;
1412
1413         session_timeout_set =
1414                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1415                                            &session_timeout);
1416         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1417                                       &termination_action))
1418                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1419
1420         if (hapd->conf->acct_interim_interval == 0 &&
1421             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1422             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1423                                       &acct_interim_interval) == 0) {
1424                 if (acct_interim_interval < 60) {
1425                         hostapd_logger(hapd, sta->addr,
1426                                        HOSTAPD_MODULE_IEEE8021X,
1427                                        HOSTAPD_LEVEL_INFO,
1428                                        "ignored too small "
1429                                        "Acct-Interim-Interval %d",
1430                                        acct_interim_interval);
1431                 } else
1432                         sta->acct_interim_interval = acct_interim_interval;
1433         }
1434
1435
1436         switch (hdr->code) {
1437         case RADIUS_CODE_ACCESS_ACCEPT:
1438                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1439                         sta->vlan_id = 0;
1440 #ifndef CONFIG_NO_VLAN
1441                 else {
1442                         old_vlanid = sta->vlan_id;
1443                         sta->vlan_id = radius_msg_get_vlanid(msg);
1444                 }
1445                 if (sta->vlan_id > 0 &&
1446                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1447                                                sta->vlan_id)) {
1448                         hostapd_logger(hapd, sta->addr,
1449                                        HOSTAPD_MODULE_RADIUS,
1450                                        HOSTAPD_LEVEL_INFO,
1451                                        "VLAN ID %d", sta->vlan_id);
1452                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1453                         sta->eapol_sm->authFail = TRUE;
1454                         hostapd_logger(hapd, sta->addr,
1455                                        HOSTAPD_MODULE_IEEE8021X,
1456                                        HOSTAPD_LEVEL_INFO, "authentication "
1457                                        "server did not include required VLAN "
1458                                        "ID in Access-Accept");
1459                         break;
1460                 }
1461 #endif /* CONFIG_NO_VLAN */
1462
1463                 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1464                         break;
1465
1466                 /* RFC 3580, Ch. 3.17 */
1467                 if (session_timeout_set && termination_action ==
1468                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1469                         sm->reAuthPeriod = session_timeout;
1470                 } else if (session_timeout_set)
1471                         ap_sta_session_timeout(hapd, sta, session_timeout);
1472
1473                 sm->eap_if->aaaSuccess = TRUE;
1474                 override_eapReq = 1;
1475                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1476                                     shared_secret_len);
1477                 ieee802_1x_store_radius_class(hapd, sta, msg);
1478                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1479                 ieee802_1x_update_sta_cui(hapd, sta, msg);
1480                 if (sm->eap_if->eapKeyAvailable &&
1481                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1482                                        session_timeout_set ?
1483                                        (int) session_timeout : -1, sm) == 0) {
1484                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1485                                        HOSTAPD_LEVEL_DEBUG,
1486                                        "Added PMKSA cache entry");
1487                 }
1488                 break;
1489         case RADIUS_CODE_ACCESS_REJECT:
1490                 sm->eap_if->aaaFail = TRUE;
1491                 override_eapReq = 1;
1492                 break;
1493         case RADIUS_CODE_ACCESS_CHALLENGE:
1494                 sm->eap_if->aaaEapReq = TRUE;
1495                 if (session_timeout_set) {
1496                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1497                         sm->eap_if->aaaMethodTimeout = session_timeout;
1498                         hostapd_logger(hapd, sm->addr,
1499                                        HOSTAPD_MODULE_IEEE8021X,
1500                                        HOSTAPD_LEVEL_DEBUG,
1501                                        "using EAP timeout of %d seconds (from "
1502                                        "RADIUS)",
1503                                        sm->eap_if->aaaMethodTimeout);
1504                 } else {
1505                         /*
1506                          * Use dynamic retransmission behavior per EAP
1507                          * specification.
1508                          */
1509                         sm->eap_if->aaaMethodTimeout = 0;
1510                 }
1511                 break;
1512         }
1513
1514         ieee802_1x_decapsulate_radius(hapd, sta);
1515         if (override_eapReq)
1516                 sm->eap_if->aaaEapReq = FALSE;
1517
1518         eapol_auth_step(sm);
1519
1520         return RADIUS_RX_QUEUED;
1521 }
1522 #endif /* CONFIG_NO_RADIUS */
1523
1524
1525 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1526 {
1527         struct eapol_state_machine *sm = sta->eapol_sm;
1528         if (sm == NULL)
1529                 return;
1530
1531         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1532                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1533
1534 #ifndef CONFIG_NO_RADIUS
1535         radius_msg_free(sm->last_recv_radius);
1536         sm->last_recv_radius = NULL;
1537 #endif /* CONFIG_NO_RADIUS */
1538
1539         if (sm->eap_if->eapTimeout) {
1540                 /*
1541                  * Disconnect the STA since it did not reply to the last EAP
1542                  * request and we cannot continue EAP processing (EAP-Failure
1543                  * could only be sent if the EAP peer actually replied).
1544                  */
1545                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1546                         MAC2STR(sta->addr));
1547
1548                 sm->eap_if->portEnabled = FALSE;
1549                 ap_sta_disconnect(hapd, sta, sta->addr,
1550                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
1551         }
1552 }
1553
1554
1555 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1556 {
1557         struct eapol_authenticator *eapol = hapd->eapol_auth;
1558
1559         if (hapd->conf->default_wep_key_len < 1)
1560                 return 0;
1561
1562         os_free(eapol->default_wep_key);
1563         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1564         if (eapol->default_wep_key == NULL ||
1565             random_get_bytes(eapol->default_wep_key,
1566                              hapd->conf->default_wep_key_len)) {
1567                 printf("Could not generate random WEP key.\n");
1568                 os_free(eapol->default_wep_key);
1569                 eapol->default_wep_key = NULL;
1570                 return -1;
1571         }
1572
1573         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1574                         eapol->default_wep_key,
1575                         hapd->conf->default_wep_key_len);
1576
1577         return 0;
1578 }
1579
1580
1581 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1582                                         struct sta_info *sta, void *ctx)
1583 {
1584         if (sta->eapol_sm) {
1585                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1586                 eapol_auth_step(sta->eapol_sm);
1587         }
1588         return 0;
1589 }
1590
1591
1592 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1593 {
1594         struct hostapd_data *hapd = eloop_ctx;
1595         struct eapol_authenticator *eapol = hapd->eapol_auth;
1596
1597         if (eapol->default_wep_key_idx >= 3)
1598                 eapol->default_wep_key_idx =
1599                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1600         else
1601                 eapol->default_wep_key_idx++;
1602
1603         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1604                    eapol->default_wep_key_idx);
1605
1606         if (ieee802_1x_rekey_broadcast(hapd)) {
1607                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1608                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1609                                "new broadcast key");
1610                 os_free(eapol->default_wep_key);
1611                 eapol->default_wep_key = NULL;
1612                 return;
1613         }
1614
1615         /* TODO: Could setup key for RX here, but change default TX keyid only
1616          * after new broadcast key has been sent to all stations. */
1617         if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1618                                 broadcast_ether_addr,
1619                                 eapol->default_wep_key_idx, 1, NULL, 0,
1620                                 eapol->default_wep_key,
1621                                 hapd->conf->default_wep_key_len)) {
1622                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1623                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1624                                "new broadcast key");
1625                 os_free(eapol->default_wep_key);
1626                 eapol->default_wep_key = NULL;
1627                 return;
1628         }
1629
1630         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1631
1632         if (hapd->conf->wep_rekeying_period > 0) {
1633                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1634                                        ieee802_1x_rekey, hapd, NULL);
1635         }
1636 }
1637
1638
1639 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1640                                   const u8 *data, size_t datalen)
1641 {
1642 #ifdef CONFIG_WPS
1643         struct sta_info *sta = sta_ctx;
1644
1645         if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1646             WLAN_STA_MAYBE_WPS) {
1647                 const u8 *identity;
1648                 size_t identity_len;
1649                 struct eapol_state_machine *sm = sta->eapol_sm;
1650
1651                 identity = eap_get_identity(sm->eap, &identity_len);
1652                 if (identity &&
1653                     ((identity_len == WSC_ID_ENROLLEE_LEN &&
1654                       os_memcmp(identity, WSC_ID_ENROLLEE,
1655                                 WSC_ID_ENROLLEE_LEN) == 0) ||
1656                      (identity_len == WSC_ID_REGISTRAR_LEN &&
1657                       os_memcmp(identity, WSC_ID_REGISTRAR,
1658                                 WSC_ID_REGISTRAR_LEN) == 0))) {
1659                         wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1660                                    "WLAN_STA_WPS");
1661                         sta->flags |= WLAN_STA_WPS;
1662                 }
1663         }
1664 #endif /* CONFIG_WPS */
1665
1666         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1667 }
1668
1669
1670 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1671                                 const u8 *data, size_t datalen)
1672 {
1673 #ifndef CONFIG_NO_RADIUS
1674         struct hostapd_data *hapd = ctx;
1675         struct sta_info *sta = sta_ctx;
1676
1677         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1678 #endif /* CONFIG_NO_RADIUS */
1679 }
1680
1681
1682 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1683                                  int preauth)
1684 {
1685         struct hostapd_data *hapd = ctx;
1686         struct sta_info *sta = sta_ctx;
1687         if (preauth)
1688                 rsn_preauth_finished(hapd, sta, success);
1689         else
1690                 ieee802_1x_finished(hapd, sta, success);
1691 }
1692
1693
1694 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1695                                    size_t identity_len, int phase2,
1696                                    struct eap_user *user)
1697 {
1698         struct hostapd_data *hapd = ctx;
1699         const struct hostapd_eap_user *eap_user;
1700         int i;
1701
1702         eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1703         if (eap_user == NULL)
1704                 return -1;
1705
1706         os_memset(user, 0, sizeof(*user));
1707         user->phase2 = phase2;
1708         for (i = 0; i < EAP_MAX_METHODS; i++) {
1709                 user->methods[i].vendor = eap_user->methods[i].vendor;
1710                 user->methods[i].method = eap_user->methods[i].method;
1711         }
1712
1713         if (eap_user->password) {
1714                 user->password = os_malloc(eap_user->password_len);
1715                 if (user->password == NULL)
1716                         return -1;
1717                 os_memcpy(user->password, eap_user->password,
1718                           eap_user->password_len);
1719                 user->password_len = eap_user->password_len;
1720                 user->password_hash = eap_user->password_hash;
1721         }
1722         user->force_version = eap_user->force_version;
1723         user->ttls_auth = eap_user->ttls_auth;
1724
1725         return 0;
1726 }
1727
1728
1729 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1730 {
1731         struct hostapd_data *hapd = ctx;
1732         struct sta_info *sta;
1733         sta = ap_get_sta(hapd, addr);
1734         if (sta == NULL || sta->eapol_sm == NULL)
1735                 return 0;
1736         return 1;
1737 }
1738
1739
1740 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1741                               eapol_logger_level level, const char *txt)
1742 {
1743 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1744         struct hostapd_data *hapd = ctx;
1745         int hlevel;
1746
1747         switch (level) {
1748         case EAPOL_LOGGER_WARNING:
1749                 hlevel = HOSTAPD_LEVEL_WARNING;
1750                 break;
1751         case EAPOL_LOGGER_INFO:
1752                 hlevel = HOSTAPD_LEVEL_INFO;
1753                 break;
1754         case EAPOL_LOGGER_DEBUG:
1755         default:
1756                 hlevel = HOSTAPD_LEVEL_DEBUG;
1757                 break;
1758         }
1759
1760         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1761                        txt);
1762 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1763 }
1764
1765
1766 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1767                                            int authorized)
1768 {
1769         struct hostapd_data *hapd = ctx;
1770         struct sta_info *sta = sta_ctx;
1771         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1772 }
1773
1774
1775 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1776 {
1777         struct hostapd_data *hapd = ctx;
1778         struct sta_info *sta = sta_ctx;
1779         ieee802_1x_abort_auth(hapd, sta);
1780 }
1781
1782
1783 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1784 {
1785         struct hostapd_data *hapd = ctx;
1786         struct sta_info *sta = sta_ctx;
1787         ieee802_1x_tx_key(hapd, sta);
1788 }
1789
1790
1791 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1792                                    enum eapol_event type)
1793 {
1794         /* struct hostapd_data *hapd = ctx; */
1795         struct sta_info *sta = sta_ctx;
1796         switch (type) {
1797         case EAPOL_AUTH_SM_CHANGE:
1798                 wpa_auth_sm_notify(sta->wpa_sm);
1799                 break;
1800         case EAPOL_AUTH_REAUTHENTICATE:
1801                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1802                 break;
1803         }
1804 }
1805
1806
1807 int ieee802_1x_init(struct hostapd_data *hapd)
1808 {
1809         int i;
1810         struct eapol_auth_config conf;
1811         struct eapol_auth_cb cb;
1812
1813         os_memset(&conf, 0, sizeof(conf));
1814         conf.ctx = hapd;
1815         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1816         conf.wpa = hapd->conf->wpa;
1817         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1818         conf.eap_server = hapd->conf->eap_server;
1819         conf.ssl_ctx = hapd->ssl_ctx;
1820         conf.msg_ctx = hapd->msg_ctx;
1821         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1822         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1823         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1824         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1825         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1826         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1827         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1828         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1829         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1830         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1831         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1832         conf.tnc = hapd->conf->tnc;
1833         conf.wps = hapd->wps;
1834         conf.fragment_size = hapd->conf->fragment_size;
1835         conf.pwd_group = hapd->conf->pwd_group;
1836         conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
1837
1838         os_memset(&cb, 0, sizeof(cb));
1839         cb.eapol_send = ieee802_1x_eapol_send;
1840         cb.aaa_send = ieee802_1x_aaa_send;
1841         cb.finished = _ieee802_1x_finished;
1842         cb.get_eap_user = ieee802_1x_get_eap_user;
1843         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1844         cb.logger = ieee802_1x_logger;
1845         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1846         cb.abort_auth = _ieee802_1x_abort_auth;
1847         cb.tx_key = _ieee802_1x_tx_key;
1848         cb.eapol_event = ieee802_1x_eapol_event;
1849
1850         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1851         if (hapd->eapol_auth == NULL)
1852                 return -1;
1853
1854         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1855             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1856                 return -1;
1857
1858 #ifndef CONFIG_NO_RADIUS
1859         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1860                                    ieee802_1x_receive_auth, hapd))
1861                 return -1;
1862 #endif /* CONFIG_NO_RADIUS */
1863
1864         if (hapd->conf->default_wep_key_len) {
1865                 for (i = 0; i < 4; i++)
1866                         hostapd_drv_set_key(hapd->conf->iface, hapd,
1867                                             WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1868                                             NULL, 0);
1869
1870                 ieee802_1x_rekey(hapd, NULL);
1871
1872                 if (hapd->eapol_auth->default_wep_key == NULL)
1873                         return -1;
1874         }
1875
1876         return 0;
1877 }
1878
1879
1880 void ieee802_1x_deinit(struct hostapd_data *hapd)
1881 {
1882         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1883
1884         if (hapd->driver != NULL &&
1885             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1886                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1887
1888         eapol_auth_deinit(hapd->eapol_auth);
1889         hapd->eapol_auth = NULL;
1890 }
1891
1892
1893 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1894                          const u8 *buf, size_t len, int ack)
1895 {
1896         struct ieee80211_hdr *hdr;
1897         u8 *pos;
1898         const unsigned char rfc1042_hdr[ETH_ALEN] =
1899                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1900
1901         if (sta == NULL)
1902                 return -1;
1903         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
1904                 return 0;
1905
1906         hdr = (struct ieee80211_hdr *) buf;
1907         pos = (u8 *) (hdr + 1);
1908         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1909                 return 0;
1910         pos += sizeof(rfc1042_hdr);
1911         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1912                 return 0;
1913         pos += 2;
1914
1915         return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
1916                                           ack);
1917 }
1918
1919
1920 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1921                                const u8 *buf, int len, int ack)
1922 {
1923         const struct ieee802_1x_hdr *xhdr =
1924                 (const struct ieee802_1x_hdr *) buf;
1925         const u8 *pos = buf + sizeof(*xhdr);
1926         struct ieee802_1x_eapol_key *key;
1927
1928         if (len < (int) sizeof(*xhdr))
1929                 return 0;
1930         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1931                    "type=%d length=%d - ack=%d",
1932                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1933                    be_to_host16(xhdr->length), ack);
1934
1935         if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
1936                 return 0;
1937
1938         if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1939                 const struct wpa_eapol_key *wpa;
1940                 wpa = (const struct wpa_eapol_key *) pos;
1941                 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1942                     wpa->type == EAPOL_KEY_TYPE_WPA)
1943                         wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1944                                                      sta->wpa_sm, ack);
1945         }
1946
1947         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1948          * or Authenticator state machines, but EAPOL-Key packets are not
1949          * retransmitted in case of failure. Try to re-send failed EAPOL-Key
1950          * packets couple of times because otherwise STA keys become
1951          * unsynchronized with AP. */
1952         if (!ack && pos + sizeof(*key) <= buf + len) {
1953                 key = (struct ieee802_1x_eapol_key *) pos;
1954                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1955                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1956                                "frame (%scast index=%d)",
1957                                key->key_index & BIT(7) ? "uni" : "broad",
1958                                key->key_index & ~BIT(7));
1959                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1960                  * between them?). If all attempt fail, report error and
1961                  * deauthenticate STA so that it will get new keys when
1962                  * authenticating again (e.g., after returning in range).
1963                  * Separate limit/transmit state needed both for unicast and
1964                  * broadcast keys(?) */
1965         }
1966         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1967          * to here and change the key only if the EAPOL-Key packet was Acked.
1968          */
1969
1970         return 1;
1971 }
1972
1973
1974 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1975 {
1976         if (sm == NULL || sm->identity == NULL)
1977                 return NULL;
1978
1979         *len = sm->identity_len;
1980         return sm->identity;
1981 }
1982
1983
1984 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1985                                  int idx)
1986 {
1987         if (sm == NULL || sm->radius_class.attr == NULL ||
1988             idx >= (int) sm->radius_class.count)
1989                 return NULL;
1990
1991         *len = sm->radius_class.attr[idx].len;
1992         return sm->radius_class.attr[idx].data;
1993 }
1994
1995
1996 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
1997 {
1998         if (sm == NULL)
1999                 return NULL;
2000         return sm->radius_cui;
2001 }
2002
2003
2004 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2005 {
2006         *len = 0;
2007         if (sm == NULL)
2008                 return NULL;
2009
2010         *len = sm->eap_if->eapKeyDataLen;
2011         return sm->eap_if->eapKeyData;
2012 }
2013
2014
2015 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2016                                     int enabled)
2017 {
2018         if (sm == NULL)
2019                 return;
2020         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
2021         eapol_auth_step(sm);
2022 }
2023
2024
2025 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
2026                                   int valid)
2027 {
2028         if (sm == NULL)
2029                 return;
2030         sm->portValid = valid ? TRUE : FALSE;
2031         eapol_auth_step(sm);
2032 }
2033
2034
2035 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
2036 {
2037         if (sm == NULL)
2038                 return;
2039         if (pre_auth)
2040                 sm->flags |= EAPOL_SM_PREAUTH;
2041         else
2042                 sm->flags &= ~EAPOL_SM_PREAUTH;
2043 }
2044
2045
2046 static const char * bool_txt(Boolean bool)
2047 {
2048         return bool ? "TRUE" : "FALSE";
2049 }
2050
2051
2052 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2053 {
2054         /* TODO */
2055         return 0;
2056 }
2057
2058
2059 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2060                            char *buf, size_t buflen)
2061 {
2062         int len = 0, ret;
2063         struct eapol_state_machine *sm = sta->eapol_sm;
2064         struct os_time t;
2065
2066         if (sm == NULL)
2067                 return 0;
2068
2069         ret = os_snprintf(buf + len, buflen - len,
2070                           "dot1xPaePortNumber=%d\n"
2071                           "dot1xPaePortProtocolVersion=%d\n"
2072                           "dot1xPaePortCapabilities=1\n"
2073                           "dot1xPaePortInitialize=%d\n"
2074                           "dot1xPaePortReauthenticate=FALSE\n",
2075                           sta->aid,
2076                           EAPOL_VERSION,
2077                           sm->initialize);
2078         if (ret < 0 || (size_t) ret >= buflen - len)
2079                 return len;
2080         len += ret;
2081
2082         /* dot1xAuthConfigTable */
2083         ret = os_snprintf(buf + len, buflen - len,
2084                           "dot1xAuthPaeState=%d\n"
2085                           "dot1xAuthBackendAuthState=%d\n"
2086                           "dot1xAuthAdminControlledDirections=%d\n"
2087                           "dot1xAuthOperControlledDirections=%d\n"
2088                           "dot1xAuthAuthControlledPortStatus=%d\n"
2089                           "dot1xAuthAuthControlledPortControl=%d\n"
2090                           "dot1xAuthQuietPeriod=%u\n"
2091                           "dot1xAuthServerTimeout=%u\n"
2092                           "dot1xAuthReAuthPeriod=%u\n"
2093                           "dot1xAuthReAuthEnabled=%s\n"
2094                           "dot1xAuthKeyTxEnabled=%s\n",
2095                           sm->auth_pae_state + 1,
2096                           sm->be_auth_state + 1,
2097                           sm->adminControlledDirections,
2098                           sm->operControlledDirections,
2099                           sm->authPortStatus,
2100                           sm->portControl,
2101                           sm->quietPeriod,
2102                           sm->serverTimeout,
2103                           sm->reAuthPeriod,
2104                           bool_txt(sm->reAuthEnabled),
2105                           bool_txt(sm->keyTxEnabled));
2106         if (ret < 0 || (size_t) ret >= buflen - len)
2107                 return len;
2108         len += ret;
2109
2110         /* dot1xAuthStatsTable */
2111         ret = os_snprintf(buf + len, buflen - len,
2112                           "dot1xAuthEapolFramesRx=%u\n"
2113                           "dot1xAuthEapolFramesTx=%u\n"
2114                           "dot1xAuthEapolStartFramesRx=%u\n"
2115                           "dot1xAuthEapolLogoffFramesRx=%u\n"
2116                           "dot1xAuthEapolRespIdFramesRx=%u\n"
2117                           "dot1xAuthEapolRespFramesRx=%u\n"
2118                           "dot1xAuthEapolReqIdFramesTx=%u\n"
2119                           "dot1xAuthEapolReqFramesTx=%u\n"
2120                           "dot1xAuthInvalidEapolFramesRx=%u\n"
2121                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
2122                           "dot1xAuthLastEapolFrameVersion=%u\n"
2123                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2124                           sm->dot1xAuthEapolFramesRx,
2125                           sm->dot1xAuthEapolFramesTx,
2126                           sm->dot1xAuthEapolStartFramesRx,
2127                           sm->dot1xAuthEapolLogoffFramesRx,
2128                           sm->dot1xAuthEapolRespIdFramesRx,
2129                           sm->dot1xAuthEapolRespFramesRx,
2130                           sm->dot1xAuthEapolReqIdFramesTx,
2131                           sm->dot1xAuthEapolReqFramesTx,
2132                           sm->dot1xAuthInvalidEapolFramesRx,
2133                           sm->dot1xAuthEapLengthErrorFramesRx,
2134                           sm->dot1xAuthLastEapolFrameVersion,
2135                           MAC2STR(sm->addr));
2136         if (ret < 0 || (size_t) ret >= buflen - len)
2137                 return len;
2138         len += ret;
2139
2140         /* dot1xAuthDiagTable */
2141         ret = os_snprintf(buf + len, buflen - len,
2142                           "dot1xAuthEntersConnecting=%u\n"
2143                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2144                           "dot1xAuthEntersAuthenticating=%u\n"
2145                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2146                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2147                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2148                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2149                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2150                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2151                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2152                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2153                           "dot1xAuthBackendResponses=%u\n"
2154                           "dot1xAuthBackendAccessChallenges=%u\n"
2155                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2156                           "dot1xAuthBackendAuthSuccesses=%u\n"
2157                           "dot1xAuthBackendAuthFails=%u\n",
2158                           sm->authEntersConnecting,
2159                           sm->authEapLogoffsWhileConnecting,
2160                           sm->authEntersAuthenticating,
2161                           sm->authAuthSuccessesWhileAuthenticating,
2162                           sm->authAuthTimeoutsWhileAuthenticating,
2163                           sm->authAuthFailWhileAuthenticating,
2164                           sm->authAuthEapStartsWhileAuthenticating,
2165                           sm->authAuthEapLogoffWhileAuthenticating,
2166                           sm->authAuthReauthsWhileAuthenticated,
2167                           sm->authAuthEapStartsWhileAuthenticated,
2168                           sm->authAuthEapLogoffWhileAuthenticated,
2169                           sm->backendResponses,
2170                           sm->backendAccessChallenges,
2171                           sm->backendOtherRequestsToSupplicant,
2172                           sm->backendAuthSuccesses,
2173                           sm->backendAuthFails);
2174         if (ret < 0 || (size_t) ret >= buflen - len)
2175                 return len;
2176         len += ret;
2177
2178         /* dot1xAuthSessionStatsTable */
2179         os_get_time(&t);
2180         ret = os_snprintf(buf + len, buflen - len,
2181                           /* TODO: dot1xAuthSessionOctetsRx */
2182                           /* TODO: dot1xAuthSessionOctetsTx */
2183                           /* TODO: dot1xAuthSessionFramesRx */
2184                           /* TODO: dot1xAuthSessionFramesTx */
2185                           "dot1xAuthSessionId=%08X-%08X\n"
2186                           "dot1xAuthSessionAuthenticMethod=%d\n"
2187                           "dot1xAuthSessionTime=%u\n"
2188                           "dot1xAuthSessionTerminateCause=999\n"
2189                           "dot1xAuthSessionUserName=%s\n",
2190                           sta->acct_session_id_hi, sta->acct_session_id_lo,
2191                           (wpa_key_mgmt_wpa_ieee8021x(
2192                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2193                           1 : 2,
2194                           (unsigned int) (t.sec - sta->acct_session_start),
2195                           sm->identity);
2196         if (ret < 0 || (size_t) ret >= buflen - len)
2197                 return len;
2198         len += ret;
2199
2200         return len;
2201 }
2202
2203
2204 static void ieee802_1x_finished(struct hostapd_data *hapd,
2205                                 struct sta_info *sta, int success)
2206 {
2207         const u8 *key;
2208         size_t len;
2209         /* TODO: get PMKLifetime from WPA parameters */
2210         static const int dot11RSNAConfigPMKLifetime = 43200;
2211
2212         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2213         if (success && key && len >= PMK_LEN &&
2214             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2215                                sta->eapol_sm) == 0) {
2216                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2217                                HOSTAPD_LEVEL_DEBUG,
2218                                "Added PMKSA cache entry (IEEE 802.1X)");
2219         }
2220
2221         if (!success) {
2222                 /*
2223                  * Many devices require deauthentication after WPS provisioning
2224                  * and some may not be be able to do that themselves, so
2225                  * disconnect the client here. In addition, this may also
2226                  * benefit IEEE 802.1X/EAPOL authentication cases, too since
2227                  * the EAPOL PAE state machine would remain in HELD state for
2228                  * considerable amount of time and some EAP methods, like
2229                  * EAP-FAST with anonymous provisioning, may require another
2230                  * EAPOL authentication to be started to complete connection.
2231                  */
2232                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2233                         "disconnection after EAP-Failure");
2234                 /* Add a small sleep to increase likelihood of previously
2235                  * requested EAP-Failure TX getting out before this should the
2236                  * driver reorder operations.
2237                  */
2238                 os_sleep(0, 10000);
2239                 ap_sta_disconnect(hapd, sta, sta->addr,
2240                                   WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2241         }
2242 }