/src/hostap/src/ap/ieee802_1x.c

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/*
 * hostapd / IEEE 802.1X-2004 Authenticator
 * Copyright (c) 2002-2019, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "utils/includes.h"
#ifdef CONFIG_SQLITE
#include <sqlite3.h>
#endif /* CONFIG_SQLITE */

#include "utils/common.h"
#include "utils/eloop.h"
#include "crypto/md5.h"
#include "crypto/crypto.h"
#include "crypto/random.h"
#include "common/ieee802_11_defs.h"
#include "radius/radius.h"
#include "radius/radius_client.h"
#include "eap_server/eap.h"
#include "eap_common/eap_wsc_common.h"
#include "eapol_auth/eapol_auth_sm.h"
#include "eapol_auth/eapol_auth_sm_i.h"
#include "p2p/p2p.h"
#include "hostapd.h"
#include "accounting.h"
#include "sta_info.h"
#include "wpa_auth.h"
#include "preauth_auth.h"
#include "pmksa_cache_auth.h"
#include "ap_config.h"
#include "ap_drv_ops.h"
#include "wps_hostapd.h"
#include "hs20.h"
/* FIX: Not really a good thing to require ieee802_11.h here.. (FILS) */
#include "ieee802_11.h"
#include "ieee802_1x.h"
#include "wpa_auth_kay.h"


#ifdef CONFIG_HS20
static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx);
#endif /* CONFIG_HS20 */
static bool ieee802_1x_finished(struct hostapd_data *hapd,
        struct sta_info *sta, int success,
        bool logoff);


static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
          u8 type, const u8 *data, size_t datalen)
{
  u8 *buf;
  struct ieee802_1x_hdr *xhdr;
  size_t len;
  int encrypt = 0;

  len = sizeof(*xhdr) + datalen;
  buf = os_zalloc(len);
  if (!buf) {
    wpa_printf(MSG_ERROR, "malloc() failed for %s(len=%lu)",
         __func__, (unsigned long) len);
    return;
  }

  xhdr = (struct ieee802_1x_hdr *) buf;
  xhdr->version = hapd->conf->eapol_version;
#ifdef CONFIG_MACSEC
  if (xhdr->version > 2 && hapd->conf->macsec_policy == 0)
    xhdr->version = 2;
#endif /* CONFIG_MACSEC */
  xhdr->type = type;
  xhdr->length = host_to_be16(datalen);

  if (datalen > 0 && data != NULL)
    os_memcpy(xhdr + 1, data, datalen);

  if (wpa_auth_pairwise_set(sta->wpa_sm))
    encrypt = 1;
#ifdef CONFIG_TESTING_OPTIONS
  if (hapd->ext_eapol_frame_io) {
    size_t hex_len = 2 * len + 1;
    char *hex = os_malloc(hex_len);

    if (hex) {
      wpa_snprintf_hex(hex, hex_len, buf, len);
      wpa_msg(hapd->msg_ctx, MSG_INFO,
        "EAPOL-TX " MACSTR " %s",
        MAC2STR(sta->addr), hex);
      os_free(hex);
    }
  } else
#endif /* CONFIG_TESTING_OPTIONS */
  if (sta->flags & WLAN_STA_PREAUTH) {
    rsn_preauth_send(hapd, sta, buf, len);
  } else {
    int link_id = -1;

#ifdef CONFIG_IEEE80211BE
    link_id = hapd->conf->mld_ap ? hapd->mld_link_id : -1;
#endif /* CONFIG_IEEE80211BE */
    hostapd_drv_hapd_send_eapol(
      hapd, sta->addr, buf, len,
      encrypt, hostapd_sta_flags_to_drv(sta->flags), link_id);
  }

  os_free(buf);
}


static void ieee802_1x_set_authorized(struct hostapd_data *hapd,
              struct sta_info *sta,
              bool authorized, bool mld)
{
  int res;
  bool update;

  if (sta->flags & WLAN_STA_PREAUTH)
    return;

  update = ap_sta_set_authorized_flag(hapd, sta, authorized);
  res = hostapd_set_authorized(hapd, sta, authorized);
  if (update)
    ap_sta_set_authorized_event(hapd, sta, authorized);
  hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
           HOSTAPD_LEVEL_DEBUG, "%sauthorizing port",
           authorized ? "" : "un");

  if (!mld && res && errno != ENOENT) {
    wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
         " flags for kernel driver (errno=%d).",
         MAC2STR(sta->addr), errno);
  } else if (mld && res) {
    wpa_printf(MSG_DEBUG,
         "MLD: Could not set station " MACSTR " flags",
         MAC2STR(sta->addr));
  }

  if (authorized) {
    os_get_reltime(&sta->connected_time);
    accounting_sta_start(hapd, sta);
  }
}


static void ieee802_1x_ml_set_sta_authorized(struct hostapd_data *hapd,
               struct sta_info *sta,
               bool authorized)
{
#ifdef CONFIG_IEEE80211BE
  unsigned int i;

  if (!hostapd_is_mld_ap(hapd))
    return;

  /*
   * Authorizing the station should be done only in the station
   * performing the association
   */
  if (authorized && hapd->mld_link_id != sta->mld_assoc_link_id)
    return;

  for (i = 0; i < hapd->iface->interfaces->count; i++) {
    struct sta_info *tmp_sta;
    struct mld_link_info *link;
    struct hostapd_data *tmp_hapd =
      hapd->iface->interfaces->iface[i]->bss[0];

    if (!hostapd_is_ml_partner(hapd, tmp_hapd))
      continue;

    link = &sta->mld_info.links[tmp_hapd->mld_link_id];
    if (!link->valid)
      continue;

    for (tmp_sta = tmp_hapd->sta_list; tmp_sta;
         tmp_sta = tmp_sta->next) {
      if (tmp_sta == sta ||
          tmp_sta->mld_assoc_link_id !=
          sta->mld_assoc_link_id ||
          tmp_sta->aid != sta->aid)
        continue;

      ieee802_1x_set_authorized(tmp_hapd, tmp_sta,
              authorized, true);
      break;
    }
  }
#endif /* CONFIG_IEEE80211BE */
}



void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
           struct sta_info *sta, int authorized)
{
  ieee802_1x_set_authorized(hapd, sta, authorized, false);
  ieee802_1x_ml_set_sta_authorized(hapd, sta, !!authorized);
}


#ifdef CONFIG_WEP
#ifndef CONFIG_FIPS
#ifndef CONFIG_NO_RC4

static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
          struct sta_info *sta,
          int idx, int broadcast,
          u8 *key_data, size_t key_len)
{
  u8 *buf, *ekey;
  struct ieee802_1x_hdr *hdr;
  struct ieee802_1x_eapol_key *key;
  size_t len, ekey_len;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm)
    return;

  len = sizeof(*key) + key_len;
  buf = os_zalloc(sizeof(*hdr) + len);
  if (!buf)
    return;

  hdr = (struct ieee802_1x_hdr *) buf;
  key = (struct ieee802_1x_eapol_key *) (hdr + 1);
  key->type = EAPOL_KEY_TYPE_RC4;
  WPA_PUT_BE16(key->key_length, key_len);
  wpa_get_ntp_timestamp(key->replay_counter);
  if (os_memcmp(key->replay_counter,
          hapd->last_1x_eapol_key_replay_counter,
          IEEE8021X_REPLAY_COUNTER_LEN) <= 0) {
    /* NTP timestamp did not increment from last EAPOL-Key frame;
     * use previously used value + 1 instead. */
    inc_byte_array(hapd->last_1x_eapol_key_replay_counter,
             IEEE8021X_REPLAY_COUNTER_LEN);
    os_memcpy(key->replay_counter,
        hapd->last_1x_eapol_key_replay_counter,
        IEEE8021X_REPLAY_COUNTER_LEN);
  } else {
    os_memcpy(hapd->last_1x_eapol_key_replay_counter,
        key->replay_counter,
        IEEE8021X_REPLAY_COUNTER_LEN);
  }

  if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
    wpa_printf(MSG_ERROR, "Could not get random numbers");
    os_free(buf);
    return;
  }

  key->key_index = idx | (broadcast ? 0 : BIT(7));
  if (hapd->conf->eapol_key_index_workaround) {
    /* According to some information, WinXP Supplicant seems to
     * interpret bit7 as an indication whether the key is to be
     * activated, so make it possible to enable workaround that
     * sets this bit for all keys. */
    key->key_index |= BIT(7);
  }

  /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
   * MSK[32..63] is used to sign the message. */
  if (!sm->eap_if->eapKeyData || sm->eap_if->eapKeyDataLen < 64) {
    wpa_printf(MSG_ERROR,
         "No eapKeyData available for encrypting and signing EAPOL-Key");
    os_free(buf);
    return;
  }
  os_memcpy((u8 *) (key + 1), key_data, key_len);
  ekey_len = sizeof(key->key_iv) + 32;
  ekey = os_malloc(ekey_len);
  if (!ekey) {
    wpa_printf(MSG_ERROR, "Could not encrypt key");
    os_free(buf);
    return;
  }
  os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
  os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
  rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
  os_free(ekey);

  /* This header is needed here for HMAC-MD5, but it will be regenerated
   * in ieee802_1x_send() */
  hdr->version = hapd->conf->eapol_version;
#ifdef CONFIG_MACSEC
  if (hdr->version > 2)
    hdr->version = 2;
#endif /* CONFIG_MACSEC */
  hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
  hdr->length = host_to_be16(len);
  hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
     key->key_signature);

  wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
       " (%s index=%d)", MAC2STR(sm->addr),
       broadcast ? "broadcast" : "unicast", idx);
  ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
  if (sta->eapol_sm)
    sta->eapol_sm->dot1xAuthEapolFramesTx++;
  os_free(buf);
}


static void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
{
  struct eapol_authenticator *eapol = hapd->eapol_auth;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm || !sm->eap_if->eapKeyData)
    return;

  wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
       MAC2STR(sta->addr));

#ifndef CONFIG_NO_VLAN
  if (sta->vlan_id > 0) {
    wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
    return;
  }
#endif /* CONFIG_NO_VLAN */

  if (eapol->default_wep_key) {
    ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
              eapol->default_wep_key,
              hapd->conf->default_wep_key_len);
  }

  if (hapd->conf->individual_wep_key_len > 0) {
    u8 *ikey;

    ikey = os_malloc(hapd->conf->individual_wep_key_len);
    if (!ikey ||
        random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
    {
      wpa_printf(MSG_ERROR,
           "Could not generate random individual WEP key");
      os_free(ikey);
      return;
    }

    wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
        ikey, hapd->conf->individual_wep_key_len);

    ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
              hapd->conf->individual_wep_key_len);

    /* TODO: set encryption in TX callback, i.e., only after STA
     * has ACKed EAPOL-Key frame */
    if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
          sta->addr, 0, 0, 1, NULL, 0, ikey,
          hapd->conf->individual_wep_key_len,
          KEY_FLAG_PAIRWISE_RX_TX)) {
      wpa_printf(MSG_ERROR,
           "Could not set individual WEP encryption");
    }

    os_free(ikey);
  }
}

#endif /* CONFIG_NO_RC4 */
#endif /* CONFIG_FIPS */
#endif /* CONFIG_WEP */


const char *radius_mode_txt(struct hostapd_data *hapd)
{
  switch (hapd->iface->conf->hw_mode) {
  case HOSTAPD_MODE_IEEE80211AD:
    return "802.11ad";
  case HOSTAPD_MODE_IEEE80211A:
    return "802.11a";
  case HOSTAPD_MODE_IEEE80211G:
    return "802.11g";
  case HOSTAPD_MODE_IEEE80211B:
  default:
    return "802.11b";
  }
}


int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
{
  int i;
  u8 rate = 0;

  for (i = 0; i < sta->supported_rates_len; i++)
    if ((sta->supported_rates[i] & 0x7f) > rate)
      rate = sta->supported_rates[i] & 0x7f;

  return rate;
}


#ifndef CONFIG_NO_RADIUS
static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
              struct eapol_state_machine *sm,
              const u8 *eap, size_t len)
{
  const u8 *identity;
  size_t identity_len;
  const struct eap_hdr *hdr = (const struct eap_hdr *) eap;

  if (len <= sizeof(struct eap_hdr) ||
      (hdr->code == EAP_CODE_RESPONSE &&
       eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) ||
      (hdr->code == EAP_CODE_INITIATE &&
       eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) ||
      (hdr->code != EAP_CODE_RESPONSE &&
       hdr->code != EAP_CODE_INITIATE))
    return;

  eap_erp_update_identity(sm->eap, eap, len);
  identity = eap_get_identity(sm->eap, &identity_len);
  if (!identity)
    return;

  /* Save station identity for future RADIUS packets */
  os_free(sm->identity);
  sm->identity = (u8 *) dup_binstr(identity, identity_len);
  if (!sm->identity) {
    sm->identity_len = 0;
    return;
  }

  sm->identity_len = identity_len;
  hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
           HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
  sm->dot1xAuthEapolRespIdFramesRx++;
}


static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
            struct hostapd_radius_attr *req_attr,
            struct sta_info *sta,
            struct radius_msg *msg)
{
  u32 suite;
  int ver, val;

  ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
  val = wpa_auth_get_pairwise(sta->wpa_sm);
  suite = wpa_cipher_to_suite(ver, val);
  if (val != -1 &&
      !hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
      !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
               suite)) {
    wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
    return -1;
  }

  suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2)) ?
            WPA_PROTO_RSN : WPA_PROTO_WPA,
            hapd->conf->wpa_group);
  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
      !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
               suite)) {
    wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
    return -1;
  }

  val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
  suite = wpa_akm_to_suite(val);
  if (val != -1 &&
      !hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_WLAN_AKM_SUITE) &&
      !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
               suite)) {
    wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
    return -1;
  }

  if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
    suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
              hapd->conf->group_mgmt_cipher);
    if (!hostapd_config_get_radius_attr(
          req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
        !radius_msg_add_attr_int32(
          msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
      wpa_printf(MSG_ERROR,
           "Could not add WLAN-Group-Mgmt-Cipher");
      return -1;
    }
  }

  return 0;
}


static int add_common_radius_sta_attr(struct hostapd_data *hapd,
              struct hostapd_radius_attr *req_attr,
              struct sta_info *sta,
              struct radius_msg *msg)
{
  char buf[128];

  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_SERVICE_TYPE) &&
      !radius_msg_add_attr_int32(msg, RADIUS_ATTR_SERVICE_TYPE,
               RADIUS_SERVICE_TYPE_FRAMED)) {
    wpa_printf(MSG_ERROR, "Could not add Service-Type");
    return -1;
  }

  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_NAS_PORT) &&
      sta->aid > 0 &&
      !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
    wpa_printf(MSG_ERROR, "Could not add NAS-Port");
    return -1;
  }

  os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
        MAC2STR(sta->addr));
  buf[sizeof(buf) - 1] = '\0';
  if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
         (u8 *) buf, os_strlen(buf))) {
    wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
    return -1;
  }

  if (sta->flags & WLAN_STA_PREAUTH) {
    os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
         sizeof(buf));
  } else {
    os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
          radius_sta_rate(hapd, sta) / 2,
          (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
          radius_mode_txt(hapd));
    buf[sizeof(buf) - 1] = '\0';
  }
  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_CONNECT_INFO) &&
      !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
         (u8 *) buf, os_strlen(buf))) {
    wpa_printf(MSG_ERROR, "Could not add Connect-Info");
    return -1;
  }

  if (sta->acct_session_id) {
    os_snprintf(buf, sizeof(buf), "%016llX",
          (unsigned long long) sta->acct_session_id);
    if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
           (u8 *) buf, os_strlen(buf))) {
      wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
      return -1;
    }
  }

  if ((hapd->conf->wpa & 2) &&
      !hapd->conf->disable_pmksa_caching &&
      sta->eapol_sm && sta->eapol_sm->acct_multi_session_id) {
    os_snprintf(buf, sizeof(buf), "%016llX",
          (unsigned long long)
          sta->eapol_sm->acct_multi_session_id);
    if (!radius_msg_add_attr(
          msg, RADIUS_ATTR_ACCT_MULTI_SESSION_ID,
          (u8 *) buf, os_strlen(buf))) {
      wpa_printf(MSG_INFO,
           "Could not add Acct-Multi-Session-Id");
      return -1;
    }
  }

#ifdef CONFIG_IEEE80211R_AP
  if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
      sta->wpa_sm &&
      (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
       sta->auth_alg == WLAN_AUTH_FT) &&
      !hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
      !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
               WPA_GET_BE16(
                 hapd->conf->mobility_domain))) {
    wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
    return -1;
  }
#endif /* CONFIG_IEEE80211R_AP */

  if (hapd->conf->wpa && sta->wpa_sm &&
      add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
    return -1;

  return 0;
}


int add_common_radius_attr(struct hostapd_data *hapd,
         struct hostapd_radius_attr *req_attr,
         struct sta_info *sta,
         struct radius_msg *msg)
{
  char buf[128];
  struct hostapd_radius_attr *attr;
  int len;

  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_NAS_IP_ADDRESS) &&
      hapd->conf->own_ip_addr.af == AF_INET &&
      !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
         (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
    wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
    return -1;
  }

#ifdef CONFIG_IPV6
  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
      hapd->conf->own_ip_addr.af == AF_INET6 &&
      !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
         (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
    wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
    return -1;
  }
#endif /* CONFIG_IPV6 */

  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_NAS_IDENTIFIER) &&
      hapd->conf->nas_identifier &&
      !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
         (u8 *) hapd->conf->nas_identifier,
         os_strlen(hapd->conf->nas_identifier))) {
    wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
    return -1;
  }

  len = os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":",
        MAC2STR(hapd->own_addr));
  os_memcpy(&buf[len], hapd->conf->ssid.ssid,
      hapd->conf->ssid.ssid_len);
  len += hapd->conf->ssid.ssid_len;
  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_CALLED_STATION_ID) &&
      !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
         (u8 *) buf, len)) {
    wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
    return -1;
  }

  if (!hostapd_config_get_radius_attr(req_attr,
              RADIUS_ATTR_NAS_PORT_TYPE) &&
      !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
               RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
    wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
    return -1;
  }

#ifdef CONFIG_INTERWORKING
  if (hapd->conf->interworking &&
      !is_zero_ether_addr(hapd->conf->hessid)) {
    os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
          MAC2STR(hapd->conf->hessid));
    buf[sizeof(buf) - 1] = '\0';
    if (!hostapd_config_get_radius_attr(req_attr,
                RADIUS_ATTR_WLAN_HESSID) &&
        !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
           (u8 *) buf, os_strlen(buf))) {
      wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
      return -1;
    }
  }
#endif /* CONFIG_INTERWORKING */

  if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
    return -1;

  for (attr = req_attr; attr; attr = attr->next) {
    if (!radius_msg_add_attr(msg, attr->type,
           wpabuf_head(attr->val),
           wpabuf_len(attr->val))) {
      wpa_printf(MSG_ERROR, "Could not add RADIUS attribute");
      return -1;
    }
  }

  return 0;
}


int add_sqlite_radius_attr(struct hostapd_data *hapd, struct sta_info *sta,
         struct radius_msg *msg, int acct)
{
#ifdef CONFIG_SQLITE
  const char *attrtxt;
  char addrtxt[3 * ETH_ALEN];
  char *sql;
  sqlite3_stmt *stmt = NULL;

  if (!hapd->rad_attr_db)
    return 0;

  os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, MAC2STR(sta->addr));

  sql = "SELECT attr FROM radius_attributes WHERE sta=? AND (reqtype=? OR reqtype IS NULL);";
  if (sqlite3_prepare_v2(hapd->rad_attr_db, sql, os_strlen(sql), &stmt,
             NULL) != SQLITE_OK) {
    wpa_printf(MSG_ERROR, "DB: Failed to prepare SQL statement: %s",
         sqlite3_errmsg(hapd->rad_attr_db));
    return -1;
  }
  sqlite3_bind_text(stmt, 1, addrtxt, os_strlen(addrtxt), SQLITE_STATIC);
  sqlite3_bind_text(stmt, 2, acct ? "acct" : "auth", 4, SQLITE_STATIC);
  while (sqlite3_step(stmt) == SQLITE_ROW) {
    struct hostapd_radius_attr *attr;
    struct radius_attr_hdr *hdr;

    attrtxt = (const char *) sqlite3_column_text(stmt, 0);
    attr = hostapd_parse_radius_attr(attrtxt);
    if (!attr) {
      wpa_printf(MSG_ERROR,
           "Skipping invalid attribute from SQL: %s",
           attrtxt);
      continue;
    }
    wpa_printf(MSG_DEBUG, "Adding RADIUS attribute from SQL: %s",
         attrtxt);
    hdr = radius_msg_add_attr(msg, attr->type,
            wpabuf_head(attr->val),
            wpabuf_len(attr->val));
    hostapd_config_free_radius_attr(attr);
    if (!hdr) {
      wpa_printf(MSG_ERROR,
           "Could not add RADIUS attribute from SQL");
      continue;
    }
  }

  sqlite3_reset(stmt);
  sqlite3_clear_bindings(stmt);
  sqlite3_finalize(stmt);
#endif /* CONFIG_SQLITE */

  return 0;
}


void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
           struct sta_info *sta,
           const u8 *eap, size_t len)
{
  struct radius_msg *msg;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm)
    return;

  ieee802_1x_learn_identity(hapd, sm, eap, len);

  wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS packet");

  sm->radius_identifier = radius_client_get_id(hapd->radius);
  msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
           sm->radius_identifier);
  if (!msg) {
    wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
    return;
  }

  if (radius_msg_make_authenticator(msg) < 0) {
    wpa_printf(MSG_INFO, "Could not make Request Authenticator");
    goto fail;
  }

  if (!radius_msg_add_msg_auth(msg))
    goto fail;

  if (sm->identity &&
      !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
         sm->identity, sm->identity_len)) {
    wpa_printf(MSG_INFO, "Could not add User-Name");
    goto fail;
  }

  if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
           msg) < 0)
    goto fail;

  if (sta && add_sqlite_radius_attr(hapd, sta, msg, 0) < 0)
    goto fail;

  /* TODO: should probably check MTU from driver config; 2304 is max for
   * IEEE 802.11, but use 1400 to avoid problems with too large packets
   */
  if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
              RADIUS_ATTR_FRAMED_MTU) &&
      !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
    wpa_printf(MSG_INFO, "Could not add Framed-MTU");
    goto fail;
  }

  if (!radius_msg_add_eap(msg, eap, len)) {
    wpa_printf(MSG_INFO, "Could not add EAP-Message");
    goto fail;
  }

  /* State attribute must be copied if and only if this packet is
   * Access-Request reply to the previous Access-Challenge */
  if (sm->last_recv_radius &&
      radius_msg_get_hdr(sm->last_recv_radius)->code ==
      RADIUS_CODE_ACCESS_CHALLENGE) {
    int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
                 RADIUS_ATTR_STATE);
    if (res < 0) {
      wpa_printf(MSG_INFO,
           "Could not copy State attribute from previous Access-Challenge");
      goto fail;
    }
    if (res > 0)
      wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
  }

  if (hapd->conf->radius_request_cui) {
    const u8 *cui;
    size_t cui_len;
    /* Add previously learned CUI or nul CUI to request CUI */
    if (sm->radius_cui) {
      cui = wpabuf_head(sm->radius_cui);
      cui_len = wpabuf_len(sm->radius_cui);
    } else {
      cui = (const u8 *) "\0";
      cui_len = 1;
    }
    if (!radius_msg_add_attr(msg,
           RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
           cui, cui_len)) {
      wpa_printf(MSG_ERROR, "Could not add CUI");
      goto fail;
    }
  }

#ifdef CONFIG_HS20
  if (hapd->conf->hs20) {
    u8 ver = hapd->conf->hs20_release - 1;

    if (!radius_msg_add_wfa(
          msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
          &ver, 1)) {
      wpa_printf(MSG_ERROR,
           "Could not add HS 2.0 AP version");
      goto fail;
    }

    if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
      const u8 *pos;
      u8 buf[3];
      u16 id;

      pos = wpabuf_head_u8(sta->hs20_ie);
      buf[0] = (*pos) >> 4;
      if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
          wpabuf_len(sta->hs20_ie) >= 3)
        id = WPA_GET_LE16(pos + 1);
      else
        id = 0;
      WPA_PUT_BE16(buf + 1, id);
      if (!radius_msg_add_wfa(
            msg,
            RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
            buf, sizeof(buf))) {
        wpa_printf(MSG_ERROR,
             "Could not add HS 2.0 STA version");
        goto fail;
      }
    }

    if (sta->roaming_consortium &&
        !radius_msg_add_wfa(
          msg, RADIUS_VENDOR_ATTR_WFA_HS20_ROAMING_CONSORTIUM,
          wpabuf_head(sta->roaming_consortium),
          wpabuf_len(sta->roaming_consortium))) {
      wpa_printf(MSG_ERROR,
           "Could not add HS 2.0 Roaming Consortium");
      goto fail;
    }

    if (hapd->conf->t_c_filename) {
      be32 timestamp;

      if (!radius_msg_add_wfa(
            msg,
            RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILENAME,
            (const u8 *) hapd->conf->t_c_filename,
            os_strlen(hapd->conf->t_c_filename))) {
        wpa_printf(MSG_ERROR,
             "Could not add HS 2.0 T&C Filename");
        goto fail;
      }

      timestamp = host_to_be32(hapd->conf->t_c_timestamp);
      if (!radius_msg_add_wfa(
            msg,
            RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP,
            (const u8 *) &timestamp,
            sizeof(timestamp))) {
        wpa_printf(MSG_ERROR,
             "Could not add HS 2.0 Timestamp");
        goto fail;
      }
    }
  }
#endif /* CONFIG_HS20 */

  if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
    goto fail;

  return;

 fail:
  radius_msg_free(msg);
}
#endif /* CONFIG_NO_RADIUS */


static void handle_eap_response(struct hostapd_data *hapd,
        struct sta_info *sta, struct eap_hdr *eap,
        size_t len)
{
  u8 type, *data;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm)
    return;

  data = (u8 *) (eap + 1);

  if (len < sizeof(*eap) + 1) {
    wpa_printf(MSG_INFO, "%s: too short response data", __func__);
    return;
  }

  sm->eap_type_supp = type = data[0];

  hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
           HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
           "id=%d len=%d) from STA: EAP Response-%s (%d)",
           eap->code, eap->identifier, be_to_host16(eap->length),
           eap_server_get_name(0, type), type);

  sm->dot1xAuthEapolRespFramesRx++;

  wpabuf_free(sm->eap_if->eapRespData);
  sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
  sm->eapolEap = true;
}


static void handle_eap_initiate(struct hostapd_data *hapd,
        struct sta_info *sta, struct eap_hdr *eap,
        size_t len)
{
#ifdef CONFIG_ERP
  u8 type, *data;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm)
    return;

  if (len < sizeof(*eap) + 1) {
    wpa_printf(MSG_INFO, "%s: too short response data", __func__);
    return;
  }

  data = (u8 *) (eap + 1);
  type = data[0];

  hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
           HOSTAPD_LEVEL_DEBUG,
           "received EAP packet (code=%d id=%d len=%d) from STA: EAP Initiate type %u",
           eap->code, eap->identifier, be_to_host16(eap->length),
           type);

  wpabuf_free(sm->eap_if->eapRespData);
  sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
  sm->eapolEap = true;
#endif /* CONFIG_ERP */
}


#ifndef CONFIG_NO_STDOUT_DEBUG
static const char * eap_code_str(u8 code)
{
  switch (code) {
  case EAP_CODE_REQUEST:
    return "request";
  case EAP_CODE_RESPONSE:
    return "response";
  case EAP_CODE_SUCCESS:
    return "success";
  case EAP_CODE_FAILURE:
    return "failure";
  case EAP_CODE_INITIATE:
    return "initiate";
  case EAP_CODE_FINISH:
    return "finish";
  default:
    return "unknown";
  }
}
#endif /* CONFIG_NO_STDOUT_DEBUG */


/* Process incoming EAP packet from Supplicant */
static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
           u8 *buf, size_t len)
{
  struct eap_hdr *eap;
  u16 eap_len;

  if (len < sizeof(*eap)) {
    wpa_printf(MSG_INFO, "   too short EAP packet");
    return;
  }

  eap = (struct eap_hdr *) buf;

  eap_len = be_to_host16(eap->length);
  wpa_printf(MSG_DEBUG, "EAP: code=%d (%s) identifier=%d length=%d",
       eap->code, eap_code_str(eap->code), eap->identifier,
       eap_len);
  if (eap_len < sizeof(*eap)) {
    wpa_printf(MSG_DEBUG, "   Invalid EAP length");
    return;
  } else if (eap_len > len) {
    wpa_printf(MSG_DEBUG,
         "   Too short frame to contain this EAP packet");
    return;
  } else if (eap_len < len) {
    wpa_printf(MSG_DEBUG,
         "   Ignoring %lu extra bytes after EAP packet",
         (unsigned long) len - eap_len);
  }

  switch (eap->code) {
  case EAP_CODE_RESPONSE:
    handle_eap_response(hapd, sta, eap, eap_len);
    break;
  case EAP_CODE_INITIATE:
    handle_eap_initiate(hapd, sta, eap, eap_len);
    break;
  }
}


struct eapol_state_machine *
ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
{
  int flags = 0;

  if (sta->flags & WLAN_STA_PREAUTH)
    flags |= EAPOL_SM_PREAUTH;
  if (sta->wpa_sm) {
    flags |= EAPOL_SM_USES_WPA;
    if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
      flags |= EAPOL_SM_FROM_PMKSA_CACHE;
  }
  return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
        sta->wps_ie, sta->p2p_ie, sta,
        sta->identity, sta->radius_cui);
}


static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf,
          size_t len, enum frame_encryption encrypted)
{
  if (sta->pending_eapol_rx) {
    wpabuf_free(sta->pending_eapol_rx->buf);
  } else {
    sta->pending_eapol_rx =
      os_malloc(sizeof(*sta->pending_eapol_rx));
    if (!sta->pending_eapol_rx)
      return;
  }

  sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len);
  if (!sta->pending_eapol_rx->buf) {
    os_free(sta->pending_eapol_rx);
    sta->pending_eapol_rx = NULL;
    return;
  }

  sta->pending_eapol_rx->encrypted = encrypted;
  os_get_reltime(&sta->pending_eapol_rx->rx_time);
}


static bool ieee802_1x_check_encryption(struct sta_info *sta,
          enum frame_encryption encrypted,
          u8 type)
{
  if (encrypted != FRAME_NOT_ENCRYPTED)
    return true;
  if (type != IEEE802_1X_TYPE_EAP_PACKET &&
      type != IEEE802_1X_TYPE_EAPOL_START &&
      type != IEEE802_1X_TYPE_EAPOL_LOGOFF)
    return true;
  if (!(sta->flags & WLAN_STA_MFP))
    return true;
  return !wpa_auth_pairwise_set(sta->wpa_sm);
}


/**
 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 * @hapd: hostapd BSS data
 * @sa: Source address (sender of the EAPOL frame)
 * @buf: EAPOL frame
 * @len: Length of buf in octets
 * @encrypted: Whether the frame was encrypted
 *
 * This function is called for each incoming EAPOL frame from the interface
 */
void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
      size_t len, enum frame_encryption encrypted)
{
  struct sta_info *sta;
  struct ieee802_1x_hdr *hdr;
  struct ieee802_1x_eapol_key *key;
  u16 datalen;
  struct rsn_pmksa_cache_entry *pmksa;
  int key_mgmt;

  if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
      !hapd->conf->wps_state)
    return;

  wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR
       " (encrypted=%d)",
       (unsigned long) len, MAC2STR(sa), encrypted);
  sta = ap_get_sta(hapd, sa);
  if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
         !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
    wpa_printf(MSG_DEBUG,
         "IEEE 802.1X data frame from not associated/Pre-authenticating STA");

    if (sta && (sta->flags & WLAN_STA_AUTH)) {
      wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR
           " for later use", MAC2STR(sta->addr));
      ieee802_1x_save_eapol(sta, buf, len, encrypted);
    }

    return;
  }

  if (len < sizeof(*hdr)) {
    wpa_printf(MSG_INFO, "   too short IEEE 802.1X packet");
    return;
  }

  hdr = (struct ieee802_1x_hdr *) buf;
  datalen = be_to_host16(hdr->length);
  wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
       hdr->version, hdr->type, datalen);

  if (len - sizeof(*hdr) < datalen) {
    wpa_printf(MSG_INFO,
         "   frame too short for this IEEE 802.1X packet");
    if (sta->eapol_sm)
      sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
    return;
  }
  if (len - sizeof(*hdr) > datalen) {
    wpa_printf(MSG_DEBUG,
         "   ignoring %lu extra octets after IEEE 802.1X packet",
         (unsigned long) len - sizeof(*hdr) - datalen);
  }

  if (sta->eapol_sm) {
    sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
    sta->eapol_sm->dot1xAuthEapolFramesRx++;
  }

  key = (struct ieee802_1x_eapol_key *) (hdr + 1);
  if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
      hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
      (key->type == EAPOL_KEY_TYPE_WPA ||
       key->type == EAPOL_KEY_TYPE_RSN)) {
    wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
          sizeof(*hdr) + datalen);
    return;
  }

  if (!hapd->conf->ieee802_1x &&
      !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
    wpa_printf(MSG_DEBUG,
         "IEEE 802.1X: Ignore EAPOL message - 802.1X not enabled and WPS not used");
    return;
  }

  key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
  if (key_mgmt != -1 &&
      (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE ||
       key_mgmt == WPA_KEY_MGMT_DPP)) {
    wpa_printf(MSG_DEBUG,
         "IEEE 802.1X: Ignore EAPOL message - STA is using PSK");
    return;
  }

  if (!ieee802_1x_check_encryption(sta, encrypted, hdr->type)) {
    wpa_printf(MSG_DEBUG,
         "IEEE 802.1X: Discard unencrypted EAPOL message - encryption was expected");
    return;
  }

  if (!sta->eapol_sm) {
    sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
    if (!sta->eapol_sm)
      return;

#ifdef CONFIG_WPS
    if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
      u32 wflags = sta->flags & (WLAN_STA_WPS |
               WLAN_STA_WPS2 |
               WLAN_STA_MAYBE_WPS);
      if (wflags == WLAN_STA_MAYBE_WPS ||
          wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
        /*
         * Delay EAPOL frame transmission until a
         * possible WPS STA initiates the handshake
         * with EAPOL-Start. Only allow the wait to be
         * skipped if the STA is known to support WPS
         * 2.0.
         */
        wpa_printf(MSG_DEBUG,
             "WPS: Do not start EAPOL until EAPOL-Start is received");
        sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
      }
    }
#endif /* CONFIG_WPS */

    sta->eapol_sm->eap_if->portEnabled = true;
  }

  /* since we support version 1, we can ignore version field and proceed
   * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
  /* TODO: actually, we are not version 1 anymore.. However, Version 2
   * does not change frame contents, so should be ok to process frames
   * more or less identically. Some changes might be needed for
   * verification of fields. */

  switch (hdr->type) {
  case IEEE802_1X_TYPE_EAP_PACKET:
    handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
    break;

  case IEEE802_1X_TYPE_EAPOL_START:
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_DEBUG,
             "received EAPOL-Start from STA");
#ifdef CONFIG_IEEE80211R_AP
    if (hapd->conf->wpa &&
        wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && sta->wpa_sm &&
        ((wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) &&
          (sta->flags & WLAN_STA_AUTHORIZED)) ||
         sta->auth_alg == WLAN_AUTH_FT)) {
      /* When FT is used, reauthentication to generate a new
       * PMK-R0 would be complicated since the current AP
       * might not be the one with which the currently used
       * PMK-R0 was generated. IEEE Std 802.11-2020, 13.4.2
       * (FT initial mobility domain association in an RSN)
       * mandates STA to perform a new FT initial mobility
       * domain association whenever its Supplicant would
       * trigger sending of an EAPOL-Start frame. As such,
       * this EAPOL-Start frame should not have been sent.
       * Discard it to avoid unexpected behavior. */
      hostapd_logger(hapd, sta->addr,
               HOSTAPD_MODULE_IEEE8021X,
               HOSTAPD_LEVEL_DEBUG,
               "discard unexpected EAPOL-Start from STA that uses FT");
      break;
    }
#endif /* CONFIG_IEEE80211R_AP */
    sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
    pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
    if (pmksa) {
      hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
               HOSTAPD_LEVEL_DEBUG,
               "cached PMKSA available - ignore it since STA sent EAPOL-Start");
      wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
    }
    sta->eapol_sm->eapolStart = true;
    sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
    eap_server_clear_identity(sta->eapol_sm->eap);
    wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
    break;

  case IEEE802_1X_TYPE_EAPOL_LOGOFF:
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_DEBUG,
             "received EAPOL-Logoff from STA");
    sta->acct_terminate_cause =
      RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
    accounting_sta_stop(hapd, sta);
    sta->eapol_sm->eapolLogoff = true;
    sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
    eap_server_clear_identity(sta->eapol_sm->eap);
    break;

  case IEEE802_1X_TYPE_EAPOL_KEY:
    wpa_printf(MSG_DEBUG, "   EAPOL-Key");
    if (!ap_sta_is_authorized(sta)) {
      wpa_printf(MSG_DEBUG,
           "   Dropped key data from unauthorized Supplicant");
      break;
    }
    break;

  case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
    wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
    /* TODO: implement support for this; show data */
    break;

#ifdef CONFIG_MACSEC
  case IEEE802_1X_TYPE_EAPOL_MKA:
    wpa_printf(MSG_EXCESSIVE,
         "EAPOL type %d will be handled by MKA", hdr->type);
    break;
#endif /* CONFIG_MACSEC */

  default:
    wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
    sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
    break;
  }

  eapol_auth_step(sta->eapol_sm);
}


/**
 * ieee802_1x_new_station - Start IEEE 802.1X authentication
 * @hapd: hostapd BSS data
 * @sta: The station
 *
 * This function is called to start IEEE 802.1X authentication when a new
 * station completes IEEE 802.11 association.
 */
void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
{
  struct rsn_pmksa_cache_entry *pmksa;
  int reassoc = 1;
  int force_1x = 0;
  int key_mgmt;

#ifdef CONFIG_WPS
  if (hapd->conf->wps_state &&
      ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) ||
       (sta->flags & WLAN_STA_WPS))) {
    /*
     * Need to enable IEEE 802.1X/EAPOL state machines for possible
     * WPS handshake even if IEEE 802.1X/EAPOL is not used for
     * authentication in this BSS.
     */
    force_1x = 1;
  }
#endif /* CONFIG_WPS */

  if (!force_1x && !hapd->conf->ieee802_1x) {
    wpa_printf(MSG_DEBUG,
         "IEEE 802.1X: Ignore STA - 802.1X not enabled or forced for WPS");
    /*
     * Clear any possible EAPOL authenticator state to support
     * reassociation change from WPS to PSK.
     */
    ieee802_1x_free_station(hapd, sta);
    return;
  }

  key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
  if (key_mgmt != -1 &&
      (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE ||
       key_mgmt == WPA_KEY_MGMT_DPP)) {
    wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
    /*
     * Clear any possible EAPOL authenticator state to support
     * reassociation change from WPA-EAP to PSK.
     */
    ieee802_1x_free_station(hapd, sta);
    return;
  }

  if (!sta->eapol_sm) {
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_DEBUG, "start authentication");
    sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
    if (!sta->eapol_sm) {
      hostapd_logger(hapd, sta->addr,
               HOSTAPD_MODULE_IEEE8021X,
               HOSTAPD_LEVEL_INFO,
               "failed to allocate state machine");
      return;
    }
    reassoc = 0;
  }

#ifdef CONFIG_WPS
  sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
  if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
      !(sta->flags & WLAN_STA_WPS2)) {
    /*
     * Delay EAPOL frame transmission until a possible WPS STA
     * initiates the handshake with EAPOL-Start. Only allow the
     * wait to be skipped if the STA is known to support WPS 2.0.
     */
    wpa_printf(MSG_DEBUG,
         "WPS: Do not start EAPOL until EAPOL-Start is received");
    sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
  }
#endif /* CONFIG_WPS */

  sta->eapol_sm->eap_if->portEnabled = true;

#ifdef CONFIG_IEEE80211R_AP
  if (sta->auth_alg == WLAN_AUTH_FT) {
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_DEBUG,
             "PMK from FT - skip IEEE 802.1X/EAP");
    /* Setup EAPOL state machines to already authenticated state
     * because of existing FT information from R0KH. */
    sta->eapol_sm->keyRun = true;
    sta->eapol_sm->eap_if->eapKeyAvailable = true;
    sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
    sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
    sta->eapol_sm->authSuccess = true;
    sta->eapol_sm->authFail = false;
    sta->eapol_sm->portValid = true;
    if (sta->eapol_sm->eap)
      eap_sm_notify_cached(sta->eapol_sm->eap);
    ap_sta_bind_vlan(hapd, sta);
    return;
  }
#endif /* CONFIG_IEEE80211R_AP */

#ifdef CONFIG_FILS
  if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
      sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
      sta->auth_alg == WLAN_AUTH_FILS_PK) {
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_DEBUG,
             "PMK from FILS - skip IEEE 802.1X/EAP");
    /* Setup EAPOL state machines to already authenticated state
     * because of existing FILS information. */
    sta->eapol_sm->keyRun = true;
    sta->eapol_sm->eap_if->eapKeyAvailable = true;
    sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
    sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
    sta->eapol_sm->authSuccess = true;
    sta->eapol_sm->authFail = false;
    sta->eapol_sm->portValid = true;
    if (sta->eapol_sm->eap)
      eap_sm_notify_cached(sta->eapol_sm->eap);
    wpa_auth_set_ptk_rekey_timer(sta->wpa_sm);
    return;
  }
#endif /* CONFIG_FILS */

  pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
  if (pmksa) {
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_DEBUG,
             "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
    /* Setup EAPOL state machines to already authenticated state
     * because of existing PMKSA information in the cache. */
    sta->eapol_sm->keyRun = true;
    sta->eapol_sm->eap_if->eapKeyAvailable = true;
    sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
    sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
    sta->eapol_sm->authSuccess = true;
    sta->eapol_sm->authFail = false;
    if (sta->eapol_sm->eap)
      eap_sm_notify_cached(sta->eapol_sm->eap);
    pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm);
    ap_sta_bind_vlan(hapd, sta);
  } else {
    if (reassoc) {
      /*
       * Force EAPOL state machines to start
       * re-authentication without having to wait for the
       * Supplicant to send EAPOL-Start.
       */
      sta->eapol_sm->reAuthenticate = true;
    }
    eapol_auth_step(sta->eapol_sm);
  }
}


void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta)
{
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (sta->pending_eapol_rx) {
    wpabuf_free(sta->pending_eapol_rx->buf);
    os_free(sta->pending_eapol_rx);
    sta->pending_eapol_rx = NULL;
  }

  if (!sm)
    return;

  sta->eapol_sm = NULL;

#ifndef CONFIG_NO_RADIUS
  radius_msg_free(sm->last_recv_radius);
  radius_free_class(&sm->radius_class);
#endif /* CONFIG_NO_RADIUS */

  eapol_auth_free(sm);
}


#ifndef CONFIG_NO_RADIUS
static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
            struct sta_info *sta)
{
  struct wpabuf *eap;
  const struct eap_hdr *hdr;
  int eap_type = -1;
  char buf[64];
  struct radius_msg *msg;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm || !sm->last_recv_radius) {
    if (sm)
      sm->eap_if->aaaEapNoReq = true;
    return;
  }

  msg = sm->last_recv_radius;

  eap = radius_msg_get_eap(msg);
  if (!eap) {
    /* RFC 3579, Chap. 2.6.3:
     * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
     * attribute */
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_WARNING,
             "could not extract EAP-Message from RADIUS message");
    sm->eap_if->aaaEapNoReq = true;
    return;
  }

  if (wpabuf_len(eap) < sizeof(*hdr)) {
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_WARNING,
             "too short EAP packet received from authentication server");
    wpabuf_free(eap);
    sm->eap_if->aaaEapNoReq = true;
    return;
  }

  if (wpabuf_len(eap) > sizeof(*hdr))
    eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];

  hdr = wpabuf_head(eap);
  switch (hdr->code) {
  case EAP_CODE_REQUEST:
    if (eap_type >= 0)
      sm->eap_type_authsrv = eap_type;
    os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
          eap_server_get_name(0, eap_type), eap_type);
    break;
  case EAP_CODE_RESPONSE:
    os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
          eap_server_get_name(0, eap_type), eap_type);
    break;
  case EAP_CODE_SUCCESS:
    os_strlcpy(buf, "EAP Success", sizeof(buf));
    break;
  case EAP_CODE_FAILURE:
    os_strlcpy(buf, "EAP Failure", sizeof(buf));
    break;
  default:
    os_strlcpy(buf, "unknown EAP code", sizeof(buf));
    break;
  }
  buf[sizeof(buf) - 1] = '\0';
  hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
           HOSTAPD_LEVEL_DEBUG,
           "decapsulated EAP packet (code=%d id=%d len=%d) from RADIUS server: %s",
           hdr->code, hdr->identifier, be_to_host16(hdr->length),
           buf);
  sm->eap_if->aaaEapReq = true;

  wpabuf_free(sm->eap_if->aaaEapReqData);
  sm->eap_if->aaaEapReqData = eap;
}


static void ieee802_1x_get_keys(struct hostapd_data *hapd,
        struct sta_info *sta, struct radius_msg *msg,
        struct radius_msg *req,
        const u8 *shared_secret,
        size_t shared_secret_len)
{
  struct radius_ms_mppe_keys *keys;
  u8 *buf;
  size_t len;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm)
    return;

  keys = radius_msg_get_ms_keys(msg, req, shared_secret,
              shared_secret_len);

  if (keys && keys->send && keys->recv) {
    len = keys->send_len + keys->recv_len;
    wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
        keys->send, keys->send_len);
    wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
        keys->recv, keys->recv_len);

    os_free(sm->eap_if->aaaEapKeyData);
    sm->eap_if->aaaEapKeyData = os_malloc(len);
    if (sm->eap_if->aaaEapKeyData) {
      os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
          keys->recv_len);
      os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
          keys->send, keys->send_len);
      sm->eap_if->aaaEapKeyDataLen = len;
      sm->eap_if->aaaEapKeyAvailable = true;
    }
  } else {
    wpa_printf(MSG_DEBUG,
         "MS-MPPE: 1x_get_keys, could not get keys: %p  send: %p  recv: %p",
         keys, keys ? keys->send : NULL,
         keys ? keys->recv : NULL);
  }

  if (keys) {
    os_free(keys->send);
    os_free(keys->recv);
    os_free(keys);
  }

  if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_EAP_KEY_NAME, &buf, &len,
            NULL) == 0) {
    os_free(sm->eap_if->eapSessionId);
    sm->eap_if->eapSessionId = os_memdup(buf, len);
    if (sm->eap_if->eapSessionId) {
      sm->eap_if->eapSessionIdLen = len;
      wpa_hexdump(MSG_DEBUG, "EAP-Key Name",
            sm->eap_if->eapSessionId,
            sm->eap_if->eapSessionIdLen);
    }
  } else {
    sm->eap_if->eapSessionIdLen = 0;
  }
}


static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
            struct sta_info *sta,
            struct radius_msg *msg)
{
  u8 *attr_class;
  size_t class_len;
  struct eapol_state_machine *sm = sta->eapol_sm;
  int count, i;
  struct radius_attr_data *nclass;
  size_t nclass_count;

  if (!hapd->conf->radius->acct_server || !hapd->radius || !sm)
    return;

  radius_free_class(&sm->radius_class);
  count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
  if (count <= 0)
    return;

  nclass = os_calloc(count, sizeof(struct radius_attr_data));
  if (!nclass)
    return;

  nclass_count = 0;

  attr_class = NULL;
  for (i = 0; i < count; i++) {
    do {
      if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
                &attr_class, &class_len,
                attr_class) < 0) {
        i = count;
        break;
      }
    } while (class_len < 1);

    nclass[nclass_count].data = os_memdup(attr_class, class_len);
    if (!nclass[nclass_count].data)
      break;

    nclass[nclass_count].len = class_len;
    nclass_count++;
  }

  sm->radius_class.attr = nclass;
  sm->radius_class.count = nclass_count;
  wpa_printf(MSG_DEBUG,
       "IEEE 802.1X: Stored %lu RADIUS Class attributes for "
       MACSTR,
       (unsigned long) sm->radius_class.count,
       MAC2STR(sta->addr));
}


/* Update sta->identity based on User-Name attribute in Access-Accept */
static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
             struct sta_info *sta,
             struct radius_msg *msg)
{
  u8 *buf, *identity;
  size_t len;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm)
    return;

  if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
            NULL) < 0)
    return;

  identity = (u8 *) dup_binstr(buf, len);
  if (!identity)
    return;

  hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
           HOSTAPD_LEVEL_DEBUG,
           "old identity '%s' updated with User-Name from Access-Accept '%s'",
           sm->identity ? (char *) sm->identity : "N/A",
           (char *) identity);

  os_free(sm->identity);
  sm->identity = identity;
  sm->identity_len = len;
}


/* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
              struct sta_info *sta,
              struct radius_msg *msg)
{
  struct eapol_state_machine *sm = sta->eapol_sm;
  struct wpabuf *cui;
  u8 *buf;
  size_t len;

  if (!sm)
    return;

  if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
            &buf, &len, NULL) < 0)
    return;

  cui = wpabuf_alloc_copy(buf, len);
  if (!cui)
    return;

  wpabuf_free(sm->radius_cui);
  sm->radius_cui = cui;
}


#ifdef CONFIG_HS20

static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
               struct sta_info *sta, const u8 *pos,
               size_t len)
{
  size_t url_len;
  unsigned int timeout;

  if (len < 3)
    return; /* Malformed information */
  url_len = len - 3;
  sta->hs20_deauth_requested = 1;
  sta->hs20_deauth_on_ack = url_len == 0;
  wpa_printf(MSG_DEBUG,
       "HS 2.0: Deauthentication request - Code %u  Re-auth Delay %u  URL length %zu",
       *pos, WPA_GET_LE16(pos + 1), url_len);
  wpabuf_free(sta->hs20_deauth_req);
  sta->hs20_deauth_req = wpabuf_alloc(len + 1);
  if (sta->hs20_deauth_req) {
    wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
    wpabuf_put_u8(sta->hs20_deauth_req, url_len);
    wpabuf_put_data(sta->hs20_deauth_req, pos + 3, url_len);
  }
  timeout = hapd->conf->hs20_deauth_req_timeout;
  /* If there is no URL, no need to provide time to fetch it. Use a short
   * timeout here to allow maximum time for completing 4-way handshake and
   * WNM-Notification delivery. Acknowledgement of the frame will result
   * in cutting this wait further. */
  if (!url_len && timeout > 2)
    timeout = 2;
  ap_sta_session_timeout(hapd, sta, timeout);
}


static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
           struct sta_info *sta, u8 *pos,
           size_t len, int session_timeout)
{
  unsigned int swt;
  int warning_time, beacon_int;

  if (len < 1)
    return; /* Malformed information */
  os_free(sta->hs20_session_info_url);
  sta->hs20_session_info_url = os_malloc(len);
  if (!sta->hs20_session_info_url)
    return;
  swt = pos[0];
  os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
  sta->hs20_session_info_url[len - 1] = '\0';
  wpa_printf(MSG_DEBUG,
       "HS 2.0: Session Information URL='%s' SWT=%u (session_timeout=%d)",
       sta->hs20_session_info_url, swt, session_timeout);
  if (session_timeout < 0) {
    wpa_printf(MSG_DEBUG,
         "HS 2.0: No Session-Timeout set - ignore session info URL");
    return;
  }
  if (swt == 255)
    swt = 1; /* Use one minute as the AP selected value */

  if ((unsigned int) session_timeout < swt * 60)
    warning_time = 0;
  else
    warning_time = session_timeout - swt * 60;

  beacon_int = hapd->iconf->beacon_int;
  if (beacon_int < 1)
    beacon_int = 100; /* best guess */
  sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
  if (sta->hs20_disassoc_timer > 65535)
    sta->hs20_disassoc_timer = 65535;

  ap_sta_session_warning_timeout(hapd, sta, warning_time);
}


static void ieee802_1x_hs20_t_c_filtering(struct hostapd_data *hapd,
            struct sta_info *sta, u8 *pos,
            size_t len)
{
  if (len < 4)
    return; /* Malformed information */
  wpa_printf(MSG_DEBUG,
       "HS 2.0: Terms and Conditions filtering %02x %02x %02x %02x",
       pos[0], pos[1], pos[2], pos[3]);
  hs20_t_c_filtering(hapd, sta, pos[0] & BIT(0));
}


static void ieee802_1x_hs20_t_c_url(struct hostapd_data *hapd,
            struct sta_info *sta, u8 *pos, size_t len)
{
  os_free(sta->t_c_url);
  sta->t_c_url = os_malloc(len + 1);
  if (!sta->t_c_url)
    return;
  os_memcpy(sta->t_c_url, pos, len);
  sta->t_c_url[len] = '\0';
  wpa_printf(MSG_DEBUG,
       "HS 2.0: Terms and Conditions URL %s", sta->t_c_url);
}

#endif /* CONFIG_HS20 */


static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
          struct sta_info *sta,
          struct radius_msg *msg,
          int session_timeout)
{
#ifdef CONFIG_HS20
  u8 *buf, *pos, *end, type, sublen;
  size_t len;

  buf = NULL;
  sta->hs20_deauth_requested = 0;
  sta->hs20_deauth_on_ack = 0;

  for (;;) {
    if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
              &buf, &len, buf) < 0)
      break;
    if (len < 6)
      continue;
    pos = buf;
    end = buf + len;
    if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
      continue;
    pos += 4;

    type = *pos++;
    sublen = *pos++;
    if (sublen < 2)
      continue; /* invalid length */
    sublen -= 2; /* skip header */
    if (pos + sublen > end)
      continue; /* invalid WFA VSA */

    switch (type) {
    case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
      ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
      break;
    case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
      ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
                 session_timeout);
      break;
    case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING:
      ieee802_1x_hs20_t_c_filtering(hapd, sta, pos, sublen);
      break;
    case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL:
      ieee802_1x_hs20_t_c_url(hapd, sta, pos, sublen);
      break;
    }
  }
#endif /* CONFIG_HS20 */
}


struct sta_id_search {
  u8 identifier;
  struct eapol_state_machine *sm;
};


static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
                 struct sta_info *sta,
                 void *ctx)
{
  struct sta_id_search *id_search = ctx;
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (sm && sm->radius_identifier >= 0 &&
      sm->radius_identifier == id_search->identifier) {
    id_search->sm = sm;
    return 1;
  }
  return 0;
}


static struct eapol_state_machine *
ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
{
  struct sta_id_search id_search;

  id_search.identifier = identifier;
  id_search.sm = NULL;
  ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
  return id_search.sm;
}


#ifndef CONFIG_NO_VLAN
static int ieee802_1x_update_vlan(struct radius_msg *msg,
          struct hostapd_data *hapd,
          struct sta_info *sta)
{
  struct vlan_description vlan_desc;

  os_memset(&vlan_desc, 0, sizeof(vlan_desc));
  vlan_desc.notempty = !!radius_msg_get_vlanid(msg, &vlan_desc.untagged,
                 MAX_NUM_TAGGED_VLAN,
                 vlan_desc.tagged);

  if (vlan_desc.notempty &&
      !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) {
    sta->eapol_sm->authFail = true;
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
             HOSTAPD_LEVEL_INFO,
             "Invalid VLAN %d%s received from RADIUS server",
             vlan_desc.untagged,
             vlan_desc.tagged[0] ? "+" : "");
    os_memset(&vlan_desc, 0, sizeof(vlan_desc));
    ap_sta_set_vlan(hapd, sta, &vlan_desc);
    return -1;
  }

  if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED &&
      !vlan_desc.notempty) {
    sta->eapol_sm->authFail = true;
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_INFO,
             "authentication server did not include required VLAN ID in Access-Accept");
    return -1;
  }

  return ap_sta_set_vlan(hapd, sta, &vlan_desc);
}
#endif /* CONFIG_NO_VLAN */


/**
 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
 * @msg: RADIUS response message
 * @req: RADIUS request message
 * @shared_secret: RADIUS shared secret
 * @shared_secret_len: Length of shared_secret in octets
 * @data: Context data (struct hostapd_data *)
 * Returns: Processing status
 */
static RadiusRxResult
ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
      const u8 *shared_secret, size_t shared_secret_len,
      void *data)
{
  struct hostapd_data *hapd = data;
  struct sta_info *sta;
  u32 session_timeout = 0, termination_action, acct_interim_interval;
  int session_timeout_set;
  u32 reason_code;
  struct eapol_state_machine *sm;
  int override_eapReq = 0;
  struct radius_hdr *hdr = radius_msg_get_hdr(msg);

  sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
  if (!sm) {
    wpa_printf(MSG_DEBUG,
         "IEEE 802.1X: Could not find matching station for this RADIUS message");
    return RADIUS_RX_UNKNOWN;
  }
  sta = sm->sta;

  if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 1)) {
    wpa_printf(MSG_INFO,
         "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
    return RADIUS_RX_INVALID_AUTHENTICATOR;
  }

  if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
      hdr->code != RADIUS_CODE_ACCESS_REJECT &&
      hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
    wpa_printf(MSG_INFO, "Unknown RADIUS message code");
    return RADIUS_RX_UNKNOWN;
  }

  sm->radius_identifier = -1;
  wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
       MAC2STR(sta->addr));

  radius_msg_free(sm->last_recv_radius);
  sm->last_recv_radius = msg;

  session_timeout_set =
    !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
             &session_timeout);
  if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
              &termination_action))
    termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;

  if (hapd->conf->acct_interim_interval == 0 &&
      hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
      radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
              &acct_interim_interval) == 0) {
    if (acct_interim_interval < 60) {
      hostapd_logger(hapd, sta->addr,
               HOSTAPD_MODULE_IEEE8021X,
               HOSTAPD_LEVEL_INFO,
               "ignored too small Acct-Interim-Interval %d",
               acct_interim_interval);
    } else
      sta->acct_interim_interval = acct_interim_interval;
  }


  switch (hdr->code) {
  case RADIUS_CODE_ACCESS_ACCEPT:
#ifndef CONFIG_NO_VLAN
    if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED &&
        ieee802_1x_update_vlan(msg, hapd, sta) < 0)
      break;

    if (sta->vlan_id > 0) {
      hostapd_logger(hapd, sta->addr,
               HOSTAPD_MODULE_RADIUS,
               HOSTAPD_LEVEL_INFO,
               "VLAN ID %d", sta->vlan_id);
    }

    if ((sta->flags & WLAN_STA_ASSOC) &&
        ap_sta_bind_vlan(hapd, sta) < 0)
      break;
#endif /* CONFIG_NO_VLAN */

    sta->session_timeout_set = !!session_timeout_set;
    os_get_reltime(&sta->session_timeout);
    sta->session_timeout.sec += session_timeout;

    /* RFC 3580, Ch. 3.17 */
    if (session_timeout_set && termination_action ==
        RADIUS_TERMINATION_ACTION_RADIUS_REQUEST)
      sm->reAuthPeriod = session_timeout;
    else if (session_timeout_set)
      ap_sta_session_timeout(hapd, sta, session_timeout);
    else
      ap_sta_no_session_timeout(hapd, sta);

    sm->eap_if->aaaSuccess = true;
    override_eapReq = 1;
    ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
            shared_secret_len);
    ieee802_1x_store_radius_class(hapd, sta, msg);
    ieee802_1x_update_sta_identity(hapd, sta, msg);
    ieee802_1x_update_sta_cui(hapd, sta, msg);
    ieee802_1x_check_hs20(hapd, sta, msg,
              session_timeout_set ?
              (int) session_timeout : -1);
    break;
  case RADIUS_CODE_ACCESS_REJECT:
    sm->eap_if->aaaFail = true;
    override_eapReq = 1;
    if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE,
                &reason_code) == 0) {
      wpa_printf(MSG_DEBUG,
           "RADIUS server indicated WLAN-Reason-Code %u in Access-Reject for "
           MACSTR, reason_code, MAC2STR(sta->addr));
      sta->disconnect_reason_code = reason_code;
    }
    break;
  case RADIUS_CODE_ACCESS_CHALLENGE:
    sm->eap_if->aaaEapReq = true;
    if (session_timeout_set) {
      /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
      sm->eap_if->aaaMethodTimeout = session_timeout;
      hostapd_logger(hapd, sm->addr,
               HOSTAPD_MODULE_IEEE8021X,
               HOSTAPD_LEVEL_DEBUG,
               "using EAP timeout of %d seconds (from RADIUS)",
               sm->eap_if->aaaMethodTimeout);
    } else {
      /*
       * Use dynamic retransmission behavior per EAP
       * specification.
       */
      sm->eap_if->aaaMethodTimeout = 0;
    }
    break;
  }

  ieee802_1x_decapsulate_radius(hapd, sta);
  if (override_eapReq)
    sm->eap_if->aaaEapReq = false;

#ifdef CONFIG_FILS
#ifdef NEED_AP_MLME
  if (sta->flags &
      (WLAN_STA_PENDING_FILS_ERP | WLAN_STA_PENDING_PASN_FILS_ERP)) {
    /* TODO: Add a PMKSA entry on success? */
    ieee802_11_finish_fils_auth(
      hapd, sta, hdr->code == RADIUS_CODE_ACCESS_ACCEPT,
      sm->eap_if->aaaEapReqData,
      sm->eap_if->aaaEapKeyData,
      sm->eap_if->aaaEapKeyDataLen);
  }
#endif /* NEED_AP_MLME */
#endif /* CONFIG_FILS */

  eapol_auth_step(sm);

  return RADIUS_RX_QUEUED;
}
#endif /* CONFIG_NO_RADIUS */


void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
{
  struct eapol_state_machine *sm = sta->eapol_sm;

  if (!sm)
    return;

  hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
           HOSTAPD_LEVEL_DEBUG, "aborting authentication");

#ifndef CONFIG_NO_RADIUS
  radius_msg_free(sm->last_recv_radius);
  sm->last_recv_radius = NULL;
#endif /* CONFIG_NO_RADIUS */

  if (sm->eap_if->eapTimeout) {
    /*
     * Disconnect the STA since it did not reply to the last EAP
     * request and we cannot continue EAP processing (EAP-Failure
     * could only be sent if the EAP peer actually replied).
     */
    wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
      MAC2STR(sta->addr));

    sm->eap_if->portEnabled = false;
    ap_sta_disconnect(hapd, sta, sta->addr,
          WLAN_REASON_PREV_AUTH_NOT_VALID);
  }
}


#ifdef CONFIG_WEP

static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
{
  struct eapol_authenticator *eapol = hapd->eapol_auth;

  if (hapd->conf->default_wep_key_len < 1)
    return 0;

  os_free(eapol->default_wep_key);
  eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
  if (!eapol->default_wep_key ||
      random_get_bytes(eapol->default_wep_key,
           hapd->conf->default_wep_key_len)) {
    wpa_printf(MSG_INFO, "Could not generate random WEP key");
    os_free(eapol->default_wep_key);
    eapol->default_wep_key = NULL;
    return -1;
  }

  wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
      eapol->default_wep_key,
      hapd->conf->default_wep_key_len);

  return 0;
}


static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
          struct sta_info *sta, void *ctx)
{
  if (sta->eapol_sm) {
    sta->eapol_sm->eap_if->eapKeyAvailable = true;
    eapol_auth_step(sta->eapol_sm);
  }
  return 0;
}


static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
{
  struct hostapd_data *hapd = eloop_ctx;
  struct eapol_authenticator *eapol = hapd->eapol_auth;

  if (eapol->default_wep_key_idx >= 3)
    eapol->default_wep_key_idx =
      hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
  else
    eapol->default_wep_key_idx++;

  wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
       eapol->default_wep_key_idx);

  if (ieee802_1x_rekey_broadcast(hapd)) {
    hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_WARNING,
             "failed to generate a new broadcast key");
    os_free(eapol->default_wep_key);
    eapol->default_wep_key = NULL;
    return;
  }

  /* TODO: Could setup key for RX here, but change default TX keyid only
   * after new broadcast key has been sent to all stations. */
  if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
        broadcast_ether_addr,
        eapol->default_wep_key_idx, 0, 1, NULL, 0,
        eapol->default_wep_key,
        hapd->conf->default_wep_key_len,
        KEY_FLAG_GROUP_RX_TX_DEFAULT)) {
    hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_WARNING,
             "failed to configure a new broadcast key");
    os_free(eapol->default_wep_key);
    eapol->default_wep_key = NULL;
    return;
  }

  ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);

  if (hapd->conf->wep_rekeying_period > 0) {
    eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
               ieee802_1x_rekey, hapd, NULL);
  }
}

#endif /* CONFIG_WEP */


static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
          const u8 *data, size_t datalen)
{
#ifdef CONFIG_WPS
  struct sta_info *sta = sta_ctx;

  if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
      WLAN_STA_MAYBE_WPS) {
    const u8 *identity;
    size_t identity_len;
    struct eapol_state_machine *sm = sta->eapol_sm;

    identity = eap_get_identity(sm->eap, &identity_len);
    if (identity &&
        ((identity_len == WSC_ID_ENROLLEE_LEN &&
          os_memcmp(identity, WSC_ID_ENROLLEE,
        WSC_ID_ENROLLEE_LEN) == 0) ||
         (identity_len == WSC_ID_REGISTRAR_LEN &&
          os_memcmp(identity, WSC_ID_REGISTRAR,
        WSC_ID_REGISTRAR_LEN) == 0))) {
      wpa_printf(MSG_DEBUG,
           "WPS: WLAN_STA_MAYBE_WPS -> WLAN_STA_WPS");
      sta->flags |= WLAN_STA_WPS;
    }
  }
#endif /* CONFIG_WPS */

  ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
}


static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
        const u8 *data, size_t datalen)
{
#ifndef CONFIG_NO_RADIUS
  struct hostapd_data *hapd = ctx;
  struct sta_info *sta = sta_ctx;

  ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
#endif /* CONFIG_NO_RADIUS */
}


static bool _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
         int preauth, bool logoff)
{
  struct hostapd_data *hapd = ctx;
  struct sta_info *sta = sta_ctx;

  if (preauth) {
    rsn_preauth_finished(hapd, sta, success);
    return false;
  }

  return ieee802_1x_finished(hapd, sta, success, logoff);
}


static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
           size_t identity_len, int phase2,
           struct eap_user *user)
{
  struct hostapd_data *hapd = ctx;
  const struct hostapd_eap_user *eap_user;
  int i;
  int rv = -1;

  eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
  if (!eap_user)
    goto out;

  os_memset(user, 0, sizeof(*user));
  user->phase2 = phase2;
  for (i = 0; i < EAP_MAX_METHODS; i++) {
    user->methods[i].vendor = eap_user->methods[i].vendor;
    user->methods[i].method = eap_user->methods[i].method;
  }

  if (eap_user->password) {
    user->password = os_memdup(eap_user->password,
             eap_user->password_len);
    if (!user->password)
      goto out;
    user->password_len = eap_user->password_len;
    user->password_hash = eap_user->password_hash;
    if (eap_user->salt && eap_user->salt_len) {
      user->salt = os_memdup(eap_user->salt,
                 eap_user->salt_len);
      if (!user->salt)
        goto out;
      user->salt_len = eap_user->salt_len;
    }
  }
  user->force_version = eap_user->force_version;
  user->macacl = eap_user->macacl;
  user->ttls_auth = eap_user->ttls_auth;
  rv = 0;

out:
  if (rv)
    wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__);

  return rv;
}


static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
{
  struct hostapd_data *hapd = ctx;
  struct sta_info *sta;

  sta = ap_get_sta(hapd, addr);
  if (!sta || !sta->eapol_sm)
    return 0;
  return 1;
}


static void ieee802_1x_logger(void *ctx, const u8 *addr,
            eapol_logger_level level, const char *txt)
{
#ifndef CONFIG_NO_HOSTAPD_LOGGER
  struct hostapd_data *hapd = ctx;
  int hlevel;

  switch (level) {
  case EAPOL_LOGGER_WARNING:
    hlevel = HOSTAPD_LEVEL_WARNING;
    break;
  case EAPOL_LOGGER_INFO:
    hlevel = HOSTAPD_LEVEL_INFO;
    break;
  case EAPOL_LOGGER_DEBUG:
  default:
    hlevel = HOSTAPD_LEVEL_DEBUG;
    break;
  }

  hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
           txt);
#endif /* CONFIG_NO_HOSTAPD_LOGGER */
}


static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
             int authorized)
{
  struct hostapd_data *hapd = ctx;
  struct sta_info *sta = sta_ctx;

  ieee802_1x_set_sta_authorized(hapd, sta, authorized);
}


static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
{
  struct hostapd_data *hapd = ctx;
  struct sta_info *sta = sta_ctx;

  ieee802_1x_abort_auth(hapd, sta);
}


#ifdef CONFIG_WEP
static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
{
#ifndef CONFIG_FIPS
#ifndef CONFIG_NO_RC4
  struct hostapd_data *hapd = ctx;
  struct sta_info *sta = sta_ctx;

  ieee802_1x_tx_key(hapd, sta);
#endif /* CONFIG_NO_RC4 */
#endif /* CONFIG_FIPS */
}
#endif /* CONFIG_WEP */


static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
           enum eapol_event type)
{
  /* struct hostapd_data *hapd = ctx; */
  struct sta_info *sta = sta_ctx;

  switch (type) {
  case EAPOL_AUTH_SM_CHANGE:
    wpa_auth_sm_notify(sta->wpa_sm);
    break;
  case EAPOL_AUTH_REAUTHENTICATE:
    wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
    break;
  }
}


#ifdef CONFIG_ERP

static struct eap_server_erp_key *
ieee802_1x_erp_get_key(void *ctx, const char *keyname)
{
  struct hostapd_data *hapd = ctx;
  struct eap_server_erp_key *erp;

  dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key,
       list) {
    if (os_strcmp(erp->keyname_nai, keyname) == 0)
      return erp;
  }

  return NULL;
}


static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
{
  struct hostapd_data *hapd = ctx;

  dl_list_add(&hapd->erp_keys, &erp->list);
  return 0;
}

#endif /* CONFIG_ERP */


int ieee802_1x_init(struct hostapd_data *hapd)
{
  struct eapol_auth_config conf;
  struct eapol_auth_cb cb;

#ifdef CONFIG_IEEE80211BE
  if (!hostapd_mld_is_first_bss(hapd)) {
    struct hostapd_data *first;

    first = hostapd_mld_get_first_bss(hapd);
    if (!first)
      return -1;

    if (!first->eapol_auth) {
      wpa_printf(MSG_DEBUG,
           "MLD: First BSS IEEE 802.1X state machine does not exist. Init on its behalf");

      if (ieee802_1x_init(first))
        return -1;
    }

    wpa_printf(MSG_DEBUG,
         "MLD: Using IEEE 802.1X state machine of the first BSS");

    hapd->eapol_auth = first->eapol_auth;
    return 0;
  }
#endif /* CONFIG_IEEE80211BE */

  os_memset(&conf, 0, sizeof(conf));
  conf.eap_cfg = hapd->eap_cfg;
  conf.ctx = hapd;
  conf.eap_reauth_period = hapd->conf->eap_reauth_period;
  conf.wpa = hapd->conf->wpa;
#ifdef CONFIG_WEP
  conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
#endif /* CONFIG_WEP */
  conf.eap_req_id_text = hapd->conf->eap_req_id_text;
  conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
  conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start;
  conf.erp_domain = hapd->conf->erp_domain;
#ifdef CONFIG_TESTING_OPTIONS
  conf.eap_skip_prot_success = hapd->conf->eap_skip_prot_success;
#endif /* CONFIG_TESTING_OPTIONS */

  os_memset(&cb, 0, sizeof(cb));
  cb.eapol_send = ieee802_1x_eapol_send;
  cb.aaa_send = ieee802_1x_aaa_send;
  cb.finished = _ieee802_1x_finished;
  cb.get_eap_user = ieee802_1x_get_eap_user;
  cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
  cb.logger = ieee802_1x_logger;
  cb.set_port_authorized = ieee802_1x_set_port_authorized;
  cb.abort_auth = _ieee802_1x_abort_auth;
#ifdef CONFIG_WEP
  cb.tx_key = _ieee802_1x_tx_key;
#endif /* CONFIG_WEP */
  cb.eapol_event = ieee802_1x_eapol_event;
#ifdef CONFIG_ERP
  cb.erp_get_key = ieee802_1x_erp_get_key;
  cb.erp_add_key = ieee802_1x_erp_add_key;
#endif /* CONFIG_ERP */

  hapd->eapol_auth = eapol_auth_init(&conf, &cb);
  if (!hapd->eapol_auth)
    return -1;

  if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
      hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
    return -1;

#ifndef CONFIG_NO_RADIUS
  if (radius_client_register(hapd->radius, RADIUS_AUTH,
           ieee802_1x_receive_auth, hapd))
    return -1;
#endif /* CONFIG_NO_RADIUS */

#ifdef CONFIG_WEP
  if (hapd->conf->default_wep_key_len) {
    int i;

    for (i = 0; i < 4; i++)
      hostapd_drv_set_key(hapd->conf->iface, hapd,
              WPA_ALG_NONE, NULL, i, 0, 0, NULL,
              0, NULL, 0, KEY_FLAG_GROUP);

    ieee802_1x_rekey(hapd, NULL);

    if (!hapd->eapol_auth->default_wep_key)
      return -1;
  }
#endif /* CONFIG_WEP */

  return 0;
}


void ieee802_1x_erp_flush(struct hostapd_data *hapd)
{
  struct eap_server_erp_key *erp;

  while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key,
            list)) != NULL) {
    dl_list_del(&erp->list);
    bin_clear_free(erp, sizeof(*erp));
  }
}


void ieee802_1x_deinit(struct hostapd_data *hapd)
{
#ifdef CONFIG_IEEE80211BE
  if (!hostapd_mld_is_first_bss(hapd)) {
    wpa_printf(MSG_DEBUG,
         "MLD: Deinit IEEE 802.1X state machine of a non-first BSS");

    hapd->eapol_auth = NULL;
    return;
  }
#endif /* CONFIG_IEEE80211BE */

#ifdef CONFIG_WEP
  eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
#endif /* CONFIG_WEP */

  if (hapd->driver && hapd->drv_priv &&
      (hapd->conf->ieee802_1x || hapd->conf->wpa))
    hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);

  eapol_auth_deinit(hapd->eapol_auth);
  hapd->eapol_auth = NULL;

  ieee802_1x_erp_flush(hapd);
}


int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
       const u8 *buf, size_t len, int ack)
{
  struct ieee80211_hdr *hdr;
  u8 *pos;
  const unsigned char rfc1042_hdr[ETH_ALEN] =
    { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };

  if (!sta)
    return -1;
  if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
    return 0;

  hdr = (struct ieee80211_hdr *) buf;
  pos = (u8 *) (hdr + 1);
  if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
    return 0;
  pos += sizeof(rfc1042_hdr);
  if (WPA_GET_BE16(pos) != ETH_P_PAE)
    return 0;
  pos += 2;

  return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
            ack);
}


int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
             const u8 *buf, int len, int ack)
{
  const struct ieee802_1x_hdr *xhdr =
    (const struct ieee802_1x_hdr *) buf;
  const u8 *pos = buf + sizeof(*xhdr);
  struct ieee802_1x_eapol_key *key;

  if (len < (int) sizeof(*xhdr))
    return 0;
  wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
       " TX status - version=%d type=%d length=%d - ack=%d",
       MAC2STR(sta->addr), xhdr->version, xhdr->type,
       be_to_host16(xhdr->length), ack);

#ifdef CONFIG_WPS
  if (xhdr->type == IEEE802_1X_TYPE_EAP_PACKET && ack &&
      (sta->flags & WLAN_STA_WPS) &&
      ap_sta_pending_delayed_1x_auth_fail_disconnect(hapd, sta)) {
    wpa_printf(MSG_DEBUG,
         "WPS: Indicate EAP completion on ACK for EAP-Failure");
    hostapd_wps_eap_completed(hapd);
  }
#endif /* CONFIG_WPS */

  if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
    return 0;

  if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
    const struct wpa_eapol_key *wpa;

    wpa = (const struct wpa_eapol_key *) pos;
    if (wpa->type == EAPOL_KEY_TYPE_RSN ||
        wpa->type == EAPOL_KEY_TYPE_WPA)
      wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
                 sta->wpa_sm, ack);
  }

  /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
   * or Authenticator state machines, but EAPOL-Key packets are not
   * retransmitted in case of failure. Try to re-send failed EAPOL-Key
   * packets couple of times because otherwise STA keys become
   * unsynchronized with AP. */
  if (!ack && pos + sizeof(*key) <= buf + len) {
    key = (struct ieee802_1x_eapol_key *) pos;
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
             HOSTAPD_LEVEL_DEBUG,
             "did not Ack EAPOL-Key frame (%scast index=%d)",
             key->key_index & BIT(7) ? "uni" : "broad",
             key->key_index & ~BIT(7));
    /* TODO: re-send EAPOL-Key couple of times (with short delay
     * between them?). If all attempt fail, report error and
     * deauthenticate STA so that it will get new keys when
     * authenticating again (e.g., after returning in range).
     * Separate limit/transmit state needed both for unicast and
     * broadcast keys(?) */
  }
  /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
   * to here and change the key only if the EAPOL-Key packet was Acked.
   */

  return 1;
}


u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
{
  if (!sm || !sm->identity)
    return NULL;

  *len = sm->identity_len;
  return sm->identity;
}


u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
         int idx)
{
  if (!sm || !sm->radius_class.attr ||
      idx >= (int) sm->radius_class.count)
    return NULL;

  *len = sm->radius_class.attr[idx].len;
  return sm->radius_class.attr[idx].data;
}


struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
{
  if (!sm)
    return NULL;
  return sm->radius_cui;
}


const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
{
  *len = 0;
  if (!sm)
    return NULL;

  *len = sm->eap_if->eapKeyDataLen;
  return sm->eap_if->eapKeyData;
}


#ifdef CONFIG_MACSEC
const u8 * ieee802_1x_get_session_id(struct eapol_state_machine *sm,
             size_t *len)
{
  *len = 0;
  if (!sm || !sm->eap_if)
    return NULL;

  *len = sm->eap_if->eapSessionIdLen;
  return sm->eap_if->eapSessionId;
}
#endif /* CONFIG_MACSEC */


void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
            bool enabled)
{
  if (!sm)
    return;
  sm->eap_if->portEnabled = enabled;
  eapol_auth_step(sm);
}


void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm, bool valid)
{
  if (!sm)
    return;
  sm->portValid = valid;
  eapol_auth_step(sm);
}


void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, bool pre_auth)
{
  if (!sm)
    return;
  if (pre_auth)
    sm->flags |= EAPOL_SM_PREAUTH;
  else
    sm->flags &= ~EAPOL_SM_PREAUTH;
}


static const char * bool_txt(bool val)
{
  return val ? "TRUE" : "FALSE";
}


int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
{
  /* TODO */
  return 0;
}


int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
         char *buf, size_t buflen)
{
  int len = 0, ret;
  struct eapol_state_machine *sm = sta->eapol_sm;
  struct os_reltime diff;
  const char *name1;
  const char *name2;
  char *identity_buf = NULL;

  if (!sm)
    return 0;

  ret = os_snprintf(buf + len, buflen - len,
        "dot1xPaePortNumber=%d\n"
        "dot1xPaePortProtocolVersion=%d\n"
        "dot1xPaePortCapabilities=1\n"
        "dot1xPaePortInitialize=%d\n"
        "dot1xPaePortReauthenticate=FALSE\n",
        sta->aid,
        EAPOL_VERSION,
        sm->initialize);
  if (os_snprintf_error(buflen - len, ret))
    return len;
  len += ret;

  /* dot1xAuthConfigTable */
  ret = os_snprintf(buf + len, buflen - len,
        "dot1xAuthPaeState=%d\n"
        "dot1xAuthBackendAuthState=%d\n"
        "dot1xAuthAdminControlledDirections=%d\n"
        "dot1xAuthOperControlledDirections=%d\n"
        "dot1xAuthAuthControlledPortStatus=%d\n"
        "dot1xAuthAuthControlledPortControl=%d\n"
        "dot1xAuthQuietPeriod=%u\n"
        "dot1xAuthServerTimeout=%u\n"
        "dot1xAuthReAuthPeriod=%u\n"
        "dot1xAuthReAuthEnabled=%s\n"
        "dot1xAuthKeyTxEnabled=%s\n",
        sm->auth_pae_state + 1,
        sm->be_auth_state + 1,
        sm->adminControlledDirections,
        sm->operControlledDirections,
        sm->authPortStatus,
        sm->portControl,
        sm->quietPeriod,
        sm->serverTimeout,
        sm->reAuthPeriod,
        bool_txt(sm->reAuthEnabled),
        bool_txt(sm->keyTxEnabled));
  if (os_snprintf_error(buflen - len, ret))
    return len;
  len += ret;

  /* dot1xAuthStatsTable */
  ret = os_snprintf(buf + len, buflen - len,
        "dot1xAuthEapolFramesRx=%u\n"
        "dot1xAuthEapolFramesTx=%u\n"
        "dot1xAuthEapolStartFramesRx=%u\n"
        "dot1xAuthEapolLogoffFramesRx=%u\n"
        "dot1xAuthEapolRespIdFramesRx=%u\n"
        "dot1xAuthEapolRespFramesRx=%u\n"
        "dot1xAuthEapolReqIdFramesTx=%u\n"
        "dot1xAuthEapolReqFramesTx=%u\n"
        "dot1xAuthInvalidEapolFramesRx=%u\n"
        "dot1xAuthEapLengthErrorFramesRx=%u\n"
        "dot1xAuthLastEapolFrameVersion=%u\n"
        "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
        sm->dot1xAuthEapolFramesRx,
        sm->dot1xAuthEapolFramesTx,
        sm->dot1xAuthEapolStartFramesRx,
        sm->dot1xAuthEapolLogoffFramesRx,
        sm->dot1xAuthEapolRespIdFramesRx,
        sm->dot1xAuthEapolRespFramesRx,
        sm->dot1xAuthEapolReqIdFramesTx,
        sm->dot1xAuthEapolReqFramesTx,
        sm->dot1xAuthInvalidEapolFramesRx,
        sm->dot1xAuthEapLengthErrorFramesRx,
        sm->dot1xAuthLastEapolFrameVersion,
        MAC2STR(sm->addr));
  if (os_snprintf_error(buflen - len, ret))
    return len;
  len += ret;

  /* dot1xAuthDiagTable */
  ret = os_snprintf(buf + len, buflen - len,
        "dot1xAuthEntersConnecting=%u\n"
        "dot1xAuthEapLogoffsWhileConnecting=%u\n"
        "dot1xAuthEntersAuthenticating=%u\n"
        "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
        "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
        "dot1xAuthAuthFailWhileAuthenticating=%u\n"
        "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
        "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
        "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
        "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
        "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
        "dot1xAuthBackendResponses=%u\n"
        "dot1xAuthBackendAccessChallenges=%u\n"
        "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
        "dot1xAuthBackendAuthSuccesses=%u\n"
        "dot1xAuthBackendAuthFails=%u\n",
        sm->authEntersConnecting,
        sm->authEapLogoffsWhileConnecting,
        sm->authEntersAuthenticating,
        sm->authAuthSuccessesWhileAuthenticating,
        sm->authAuthTimeoutsWhileAuthenticating,
        sm->authAuthFailWhileAuthenticating,
        sm->authAuthEapStartsWhileAuthenticating,
        sm->authAuthEapLogoffWhileAuthenticating,
        sm->authAuthReauthsWhileAuthenticated,
        sm->authAuthEapStartsWhileAuthenticated,
        sm->authAuthEapLogoffWhileAuthenticated,
        sm->backendResponses,
        sm->backendAccessChallenges,
        sm->backendOtherRequestsToSupplicant,
        sm->backendAuthSuccesses,
        sm->backendAuthFails);
  if (os_snprintf_error(buflen - len, ret))
    return len;
  len += ret;

  /* dot1xAuthSessionStatsTable */
  os_reltime_age(&sta->acct_session_start, &diff);
  if (sm->eap && !sm->identity) {
    const u8 *id;
    size_t id_len;

    id = eap_get_identity(sm->eap, &id_len);
    if (id)
      identity_buf = dup_binstr(id, id_len);
  }
  ret = os_snprintf(buf + len, buflen - len,
        /* TODO: dot1xAuthSessionOctetsRx */
        /* TODO: dot1xAuthSessionOctetsTx */
        /* TODO: dot1xAuthSessionFramesRx */
        /* TODO: dot1xAuthSessionFramesTx */
        "dot1xAuthSessionId=%016llX\n"
        "dot1xAuthSessionAuthenticMethod=%d\n"
        "dot1xAuthSessionTime=%u\n"
        "dot1xAuthSessionTerminateCause=999\n"
        "dot1xAuthSessionUserName=%s\n",
        (unsigned long long) sta->acct_session_id,
        (wpa_key_mgmt_wpa_ieee8021x(
           wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
        1 : 2,
        (unsigned int) diff.sec,
        sm->identity ? (char *) sm->identity :
           (identity_buf ? identity_buf : "N/A"));
  os_free(identity_buf);
  if (os_snprintf_error(buflen - len, ret))
    return len;
  len += ret;

  if (sm->acct_multi_session_id) {
    ret = os_snprintf(buf + len, buflen - len,
          "authMultiSessionId=%016llX\n",
          (unsigned long long)
          sm->acct_multi_session_id);
    if (os_snprintf_error(buflen - len, ret))
      return len;
    len += ret;
  }

  name1 = eap_server_get_name(0, sm->eap_type_authsrv);
  name2 = eap_server_get_name(0, sm->eap_type_supp);
  ret = os_snprintf(buf + len, buflen - len,
        "last_eap_type_as=%d (%s)\n"
        "last_eap_type_sta=%d (%s)\n",
        sm->eap_type_authsrv, name1,
        sm->eap_type_supp, name2);
  if (os_snprintf_error(buflen - len, ret))
    return len;
  len += ret;

  return len;
}


#ifdef CONFIG_HS20
static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx)
{
  struct hostapd_data *hapd = eloop_ctx;
  struct sta_info *sta = timeout_ctx;

  if (sta->hs20_deauth_req) {
    wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
         MACSTR " to indicate imminent deauthentication",
         MAC2STR(sta->addr));
    hs20_send_wnm_notification_deauth_req(hapd, sta->addr,
                  sta->hs20_deauth_req);
  }

  if (sta->hs20_t_c_filtering) {
    wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
         MACSTR " to indicate Terms and Conditions filtering",
         MAC2STR(sta->addr));
    hs20_send_wnm_notification_t_c(hapd, sta->addr, sta->t_c_url);
    os_free(sta->t_c_url);
    sta->t_c_url = NULL;
  }
}
#endif /* CONFIG_HS20 */


static bool ieee802_1x_finished(struct hostapd_data *hapd,
        struct sta_info *sta, int success,
        bool logoff)
{
  const u8 *key;
  size_t len;
  /* TODO: get PMKLifetime from WPA parameters */
  static const int dot11RSNAConfigPMKLifetime = 43200;
  unsigned int session_timeout;
  struct os_reltime now, remaining;

#ifdef CONFIG_HS20
  if (success && (sta->hs20_deauth_req || sta->hs20_t_c_filtering)) {
    wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to "
         MACSTR " in 100 ms", MAC2STR(sta->addr));
    eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
    eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send,
               hapd, sta);
  }
#endif /* CONFIG_HS20 */

#ifdef CONFIG_MACSEC
  ieee802_1x_notify_create_actor_hapd(hapd, sta);
#endif /* CONFIG_MACSEC */

  key = ieee802_1x_get_key(sta->eapol_sm, &len);
  if (sta->session_timeout_set) {
    os_get_reltime(&now);
    os_reltime_sub(&sta->session_timeout, &now, &remaining);
    session_timeout = (remaining.sec > 0) ? remaining.sec : 1;
  } else {
    session_timeout = dot11RSNAConfigPMKLifetime;
  }
  if (success && key && len >= PMK_LEN &&
      !sta->hs20_deauth_requested &&
      wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout,
             sta->eapol_sm) == 0) {
    hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
             HOSTAPD_LEVEL_DEBUG,
             "Added PMKSA cache entry (IEEE 802.1X)");
  }

  if (!success) {
    /*
     * Many devices require deauthentication after WPS provisioning
     * and some may not be be able to do that themselves, so
     * disconnect the client here. In addition, this may also
     * benefit IEEE 802.1X/EAPOL authentication cases, too since
     * the EAPOL PAE state machine would remain in HELD state for
     * considerable amount of time and some EAP methods, like
     * EAP-FAST with anonymous provisioning, may require another
     * EAPOL authentication to be started to complete connection.
     */
    ap_sta_delayed_1x_auth_fail_disconnect(hapd, sta,
                   logoff ? 0 : 10);
    if (logoff && sta->wpa_sm)
      return true;
  }

  return false;
}

Coverage Report

Created: 2025-04-24 06:18