text: /*
   * hostapd / IEEE 802.11 Management
   * Copyright (c) 2002-2017, 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"
  
  #ifndef CONFIG_NATIVE_WINDOWS
  
  #include "utils/common.h"
  #include "utils/eloop.h"
  #include "crypto/crypto.h"
  #include "crypto/sha256.h"
  #include "crypto/random.h"
  #include "common/ieee802_11_defs.h"
  #include "common/ieee802_11_common.h"
  #include "common/wpa_ctrl.h"
  #include "common/sae.h"
  #include "radius/radius.h"
  #include "radius/radius_client.h"
  #include "p2p/p2p.h"
  #include "wps/wps.h"
  #include "fst/fst.h"
  #include "hostapd.h"
  #include "beacon.h"
  #include "ieee802_11_auth.h"
  #include "sta_info.h"
  #include "ieee802_1x.h"
  #include "wpa_auth.h"
  #include "pmksa_cache_auth.h"
  #include "wmm.h"
  #include "ap_list.h"
  #include "accounting.h"
  #include "ap_config.h"
  #include "ap_mlme.h"
  #include "p2p_hostapd.h"
  #include "ap_drv_ops.h"
  #include "wnm_ap.h"
  #include "hw_features.h"
  #include "ieee802_11.h"
  #include "dfs.h"
  #include "mbo_ap.h"
  #include "rrm.h"
  #include "taxonomy.h"
  #include "fils_hlp.h"
  
  
  #ifdef CONFIG_FILS
  static struct wpabuf *
  prepare_auth_resp_fils(struct hostapd_data *hapd,
  		       struct sta_info *sta, u16 *resp,
  		       struct rsn_pmksa_cache_entry *pmksa,
  		       struct wpabuf *erp_resp,
  		       const u8 *msk, size_t msk_len,
  		       int *is_pub);
  #endif /* CONFIG_FILS */
  
  u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
  {
  	u8 *pos = eid;
  	int i, num, count;
  
  	if (hapd->iface->current_rates == NULL)
  		return eid;
  
  	*pos++ = WLAN_EID_SUPP_RATES;
  	num = hapd->iface->num_rates;
  	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
  		num++;
  	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
  		num++;
  	if (num > 8) {
  		/* rest of the rates are encoded in Extended supported
  		 * rates element */
  		num = 8;
  	}
  
  	*pos++ = num;
  	for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
  	     i++) {
  		count++;
  		*pos = hapd->iface->current_rates[i].rate / 5;
  		if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
  			*pos |= 0x80;
  		pos++;
  	}
  
  	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) {
  		count++;
  		*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
  	}
  
  	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) {
  		count++;
  		*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
  	}
  
  	return pos;
  }
  
  
  u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
  {
  	u8 *pos = eid;
  	int i, num, count;
  
  	if (hapd->iface->current_rates == NULL)
  		return eid;
  
  	num = hapd->iface->num_rates;
  	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
  		num++;
  	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
  		num++;
  	if (num <= 8)
  		return eid;
  	num -= 8;
  
  	*pos++ = WLAN_EID_EXT_SUPP_RATES;
  	*pos++ = num;
  	for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
  	     i++) {
  		count++;
  		if (count <= 8)
  			continue; /* already in SuppRates IE */
  		*pos = hapd->iface->current_rates[i].rate / 5;
  		if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
  			*pos |= 0x80;
  		pos++;
  	}
  
  	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
  		count++;
  		if (count > 8)
  			*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
  	}
  
  	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
  		count++;
  		if (count > 8)
  			*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
  	}
  
  	return pos;
  }
  
  
  u16 hostapd_own_capab_info(struct hostapd_data *hapd)
  {
  	int capab = WLAN_CAPABILITY_ESS;
  	int privacy;
  	int dfs;
  	int i;
  
  	/* Check if any of configured channels require DFS */
  	dfs = hostapd_is_dfs_required(hapd->iface);
  	if (dfs < 0) {
  		wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
  			   dfs);
  		dfs = 0;
  	}
  
  	if (hapd->iface->num_sta_no_short_preamble == 0 &&
  	    hapd->iconf->preamble == SHORT_PREAMBLE)
  		capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
  
  	privacy = hapd->conf->ssid.wep.keys_set;
  
  	if (hapd->conf->ieee802_1x &&
  	    (hapd->conf->default_wep_key_len ||
  	     hapd->conf->individual_wep_key_len))
  		privacy = 1;
  
  	if (hapd->conf->wpa)
  		privacy = 1;
  
  #ifdef CONFIG_HS20
  	if (hapd->conf->osen)
  		privacy = 1;
  #endif /* CONFIG_HS20 */
  
  	if (privacy)
  		capab |= WLAN_CAPABILITY_PRIVACY;
  
  	if (hapd->iface->current_mode &&
  	    hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
  	    hapd->iface->num_sta_no_short_slot_time == 0)
  		capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
  
  	/*
  	 * Currently, Spectrum Management capability bit is set when directly
  	 * requested in configuration by spectrum_mgmt_required or when AP is
  	 * running on DFS channel.
  	 * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit
  	 */
  	if (hapd->iface->current_mode &&
  	    hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
  	    (hapd->iconf->spectrum_mgmt_required || dfs))
  		capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
  
  	for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
  		if (hapd->conf->radio_measurements[i]) {
  			capab |= IEEE80211_CAP_RRM;
  			break;
  		}
  	}
  
  	return capab;
  }
  
  
  #ifndef CONFIG_NO_RC4
  static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
  			   u16 auth_transaction, const u8 *challenge,
  			   int iswep)
  {
  	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  		       HOSTAPD_LEVEL_DEBUG,
  		       "authentication (shared key, transaction %d)",
  		       auth_transaction);
  
  	if (auth_transaction == 1) {
  		if (!sta->challenge) {
  			/* Generate a pseudo-random challenge */
  			u8 key[8];
  
  			sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
  			if (sta->challenge == NULL)
  				return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  			if (os_get_random(key, sizeof(key)) < 0) {
  				os_free(sta->challenge);
  				sta->challenge = NULL;
  				return WLAN_STATUS_UNSPECIFIED_FAILURE;
  			}
  
  			rc4_skip(key, sizeof(key), 0,
  				 sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
  		}
  		return 0;
  	}
  
  	if (auth_transaction != 3)
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  	/* Transaction 3 */
  	if (!iswep || !sta->challenge || !challenge ||
  	    os_memcmp_const(sta->challenge, challenge,
  			    WLAN_AUTH_CHALLENGE_LEN)) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_INFO,
  			       "shared key authentication - invalid "
  			       "challenge-response");
  		return WLAN_STATUS_CHALLENGE_FAIL;
  	}
  
  	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  		       HOSTAPD_LEVEL_DEBUG,
  		       "authentication OK (shared key)");
  	sta->flags |= WLAN_STA_AUTH;
  	wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
  	os_free(sta->challenge);
  	sta->challenge = NULL;
  
  	return 0;
  }
  #endif /* CONFIG_NO_RC4 */
  
  
  static int send_auth_reply(struct hostapd_data *hapd,
  			   const u8 *dst, const u8 *bssid,
  			   u16 auth_alg, u16 auth_transaction, u16 resp,
  			   const u8 *ies, size_t ies_len)
  {
  	struct ieee80211_mgmt *reply;
  	u8 *buf;
  	size_t rlen;
  	int reply_res = WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  	rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
  	buf = os_zalloc(rlen);
  	if (buf == NULL)
  		return -1;
  
  	reply = (struct ieee80211_mgmt *) buf;
  	reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
  					    WLAN_FC_STYPE_AUTH);
  	os_memcpy(reply->da, dst, ETH_ALEN);
  	os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
  	os_memcpy(reply->bssid, bssid, ETH_ALEN);
  
  	reply->u.auth.auth_alg = host_to_le16(auth_alg);
  	reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
  	reply->u.auth.status_code = host_to_le16(resp);
  
  	if (ies && ies_len)
  		os_memcpy(reply->u.auth.variable, ies, ies_len);
  
  	wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
  		   " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
  		   MAC2STR(dst), auth_alg, auth_transaction,
  		   resp, (unsigned long) ies_len);
  	if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0)
  		wpa_printf(MSG_INFO, "send_auth_reply: send failed");
  	else
  		reply_res = WLAN_STATUS_SUCCESS;
  
  	os_free(buf);
  
  	return reply_res;
  }
  
  
  #ifdef CONFIG_IEEE80211R_AP
  static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
  				  u16 auth_transaction, u16 status,
  				  const u8 *ies, size_t ies_len)
  {
  	struct hostapd_data *hapd = ctx;
  	struct sta_info *sta;
  	int reply_res;
  
  	reply_res = send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT,
  				    auth_transaction, status, ies, ies_len);
  
  	sta = ap_get_sta(hapd, dst);
  	if (sta == NULL)
  		return;
  
  	if (sta->added_unassoc && (reply_res != WLAN_STATUS_SUCCESS ||
  				   status != WLAN_STATUS_SUCCESS)) {
  		hostapd_drv_sta_remove(hapd, sta->addr);
  		sta->added_unassoc = 0;
  		return;
  	}
  
  	if (status != WLAN_STATUS_SUCCESS)
  		return;
  
  	hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
  		       HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
  	sta->flags |= WLAN_STA_AUTH;
  	mlme_authenticate_indication(hapd, sta);
  }
  #endif /* CONFIG_IEEE80211R_AP */
  
  
  #ifdef CONFIG_SAE
  
  #define dot11RSNASAESync 5		/* attempts */
  
  
  static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd,
  					     struct sta_info *sta, int update)
  {
  	struct wpabuf *buf;
  
  	if (hapd->conf->ssid.wpa_passphrase == NULL) {
  		wpa_printf(MSG_DEBUG, "SAE: No password available");
  		return NULL;
  	}
  
  	if (update &&
  	    sae_prepare_commit(hapd->own_addr, sta->addr,
  			       (u8 *) hapd->conf->ssid.wpa_passphrase,
  			       os_strlen(hapd->conf->ssid.wpa_passphrase),
  			       sta->sae) < 0) {
  		wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
  		return NULL;
  	}
  
  	buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN);
  	if (buf == NULL)
  		return NULL;
  	sae_write_commit(sta->sae, buf, sta->sae->tmp ?
  			 sta->sae->tmp->anti_clogging_token : NULL);
  
  	return buf;
  }
  
  
  static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd,
  					      struct sta_info *sta)
  {
  	struct wpabuf *buf;
  
  	buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN);
  	if (buf == NULL)
  		return NULL;
  
  	sae_write_confirm(sta->sae, buf);
  
  	return buf;
  }
  
  
  static int auth_sae_send_commit(struct hostapd_data *hapd,
  				struct sta_info *sta,
  				const u8 *bssid, int update)
  {
  	struct wpabuf *data;
  	int reply_res;
  
  	data = auth_build_sae_commit(hapd, sta, update);
  	if (data == NULL)
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  	reply_res = send_auth_reply(hapd, sta->addr, bssid, WLAN_AUTH_SAE, 1,
  				    WLAN_STATUS_SUCCESS, wpabuf_head(data),
  				    wpabuf_len(data));
  
  	wpabuf_free(data);
  
  	return reply_res;
  }
  
  
  static int auth_sae_send_confirm(struct hostapd_data *hapd,
  				 struct sta_info *sta,
  				 const u8 *bssid)
  {
  	struct wpabuf *data;
  	int reply_res;
  
  	data = auth_build_sae_confirm(hapd, sta);
  	if (data == NULL)
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  	reply_res = send_auth_reply(hapd, sta->addr, bssid, WLAN_AUTH_SAE, 2,
  				    WLAN_STATUS_SUCCESS, wpabuf_head(data),
  				    wpabuf_len(data));
  
  	wpabuf_free(data);
  
  	return reply_res;
  }
  
  
  static int use_sae_anti_clogging(struct hostapd_data *hapd)
  {
  	struct sta_info *sta;
  	unsigned int open = 0;
  
  	if (hapd->conf->sae_anti_clogging_threshold == 0)
  		return 1;
  
  	for (sta = hapd->sta_list; sta; sta = sta->next) {
  		if (!sta->sae)
  			continue;
  		if (sta->sae->state != SAE_COMMITTED &&
  		    sta->sae->state != SAE_CONFIRMED)
  			continue;
  		open++;
  		if (open >= hapd->conf->sae_anti_clogging_threshold)
  			return 1;
  	}
  
  	return 0;
  }
  
  
  static int check_sae_token(struct hostapd_data *hapd, const u8 *addr,
  			   const u8 *token, size_t token_len)
  {
  	u8 mac[SHA256_MAC_LEN];
  
  	if (token_len != SHA256_MAC_LEN)
  		return -1;
  	if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
  			addr, ETH_ALEN, mac) < 0 ||
  	    os_memcmp_const(token, mac, SHA256_MAC_LEN) != 0)
  		return -1;
  
  	return 0;
  }
  
  
  static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd,
  					    int group, const u8 *addr)
  {
  	struct wpabuf *buf;
  	u8 *token;
  	struct os_reltime now;
  
  	os_get_reltime(&now);
  	if (!os_reltime_initialized(&hapd->last_sae_token_key_update) ||
  	    os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) {
  		if (random_get_bytes(hapd->sae_token_key,
  				     sizeof(hapd->sae_token_key)) < 0)
  			return NULL;
  		wpa_hexdump(MSG_DEBUG, "SAE: Updated token key",
  			    hapd->sae_token_key, sizeof(hapd->sae_token_key));
  		hapd->last_sae_token_key_update = now;
  	}
  
  	buf = wpabuf_alloc(sizeof(le16) + SHA256_MAC_LEN);
  	if (buf == NULL)
  		return NULL;
  
  	wpabuf_put_le16(buf, group); /* Finite Cyclic Group */
  
  	token = wpabuf_put(buf, SHA256_MAC_LEN);
  	hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
  		    addr, ETH_ALEN, token);
  
  	return buf;
  }
  
  
  static int sae_check_big_sync(struct sta_info *sta)
  {
  	if (sta->sae->sync > dot11RSNASAESync) {
  		sta->sae->state = SAE_NOTHING;
  		sta->sae->sync = 0;
  		return -1;
  	}
  	return 0;
  }
  
  
  static void auth_sae_retransmit_timer(void *eloop_ctx, void *eloop_data)
  {
  	struct hostapd_data *hapd = eloop_ctx;
  	struct sta_info *sta = eloop_data;
  	int ret;
  
  	if (sae_check_big_sync(sta))
  		return;
  	sta->sae->sync++;
  	wpa_printf(MSG_DEBUG, "SAE: Auth SAE retransmit timer for " MACSTR
  		   " (sync=%d state=%d)",
  		   MAC2STR(sta->addr), sta->sae->sync, sta->sae->state);
  
  	switch (sta->sae->state) {
  	case SAE_COMMITTED:
  		ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
  		eloop_register_timeout(0,
  				       hapd->dot11RSNASAERetransPeriod * 1000,
  				       auth_sae_retransmit_timer, hapd, sta);
  		break;
  	case SAE_CONFIRMED:
  		ret = auth_sae_send_confirm(hapd, sta, hapd->own_addr);
  		eloop_register_timeout(0,
  				       hapd->dot11RSNASAERetransPeriod * 1000,
  				       auth_sae_retransmit_timer, hapd, sta);
  		break;
  	default:
  		ret = -1;
  		break;
  	}
  
  	if (ret != WLAN_STATUS_SUCCESS)
  		wpa_printf(MSG_INFO, "SAE: Failed to retransmit: ret=%d", ret);
  }
  
  
  void sae_clear_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta)
  {
  	eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
  }
  
  
  static void sae_set_retransmit_timer(struct hostapd_data *hapd,
  				     struct sta_info *sta)
  {
  	if (!(hapd->conf->mesh & MESH_ENABLED))
  		return;
  
  	eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
  	eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000,
  			       auth_sae_retransmit_timer, hapd, sta);
  }
  
  
  void sae_accept_sta(struct hostapd_data *hapd, struct sta_info *sta)
  {
  	sta->flags |= WLAN_STA_AUTH;
  	sta->auth_alg = WLAN_AUTH_SAE;
  	mlme_authenticate_indication(hapd, sta);
  	wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
  	sta->sae->state = SAE_ACCEPTED;
  	wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr,
  			       sta->sae->pmk, sta->sae->pmkid);
  }
  
  
  static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta,
  		       const u8 *bssid, u8 auth_transaction)
  {
  	int ret;
  
  	if (auth_transaction != 1 && auth_transaction != 2)
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  	switch (sta->sae->state) {
  	case SAE_NOTHING:
  		if (auth_transaction == 1) {
  			ret = auth_sae_send_commit(hapd, sta, bssid, 1);
  			if (ret)
  				return ret;
  			sta->sae->state = SAE_COMMITTED;
  
  			if (sae_process_commit(sta->sae) < 0)
  				return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  			/*
  			 * In mesh case, both Commit and Confirm can be sent
  			 * immediately. In infrastructure BSS, only a single
  			 * Authentication frame (Commit) is expected from the AP
  			 * here and the second one (Confirm) will be sent once
  			 * the STA has sent its second Authentication frame
  			 * (Confirm).
  			 */
  			if (hapd->conf->mesh & MESH_ENABLED) {
  				/*
  				 * Send both Commit and Confirm immediately
  				 * based on SAE finite state machine
  				 * Nothing -> Confirm transition.
  				 */
  				ret = auth_sae_send_confirm(hapd, sta, bssid);
  				if (ret)
  					return ret;
  				sta->sae->state = SAE_CONFIRMED;
  			} else {
  				/*
  				 * For infrastructure BSS, send only the Commit
  				 * message now to get alternating sequence of
  				 * Authentication frames between the AP and STA.
  				 * Confirm will be sent in
  				 * Committed -> Confirmed/Accepted transition
  				 * when receiving Confirm from STA.
  				 */
  			}
  			sta->sae->sync = 0;
  			sae_set_retransmit_timer(hapd, sta);
  		} else {
  			hostapd_logger(hapd, sta->addr,
  				       HOSTAPD_MODULE_IEEE80211,
  				       HOSTAPD_LEVEL_DEBUG,
  				       "SAE confirm before commit");
  		}
  		break;
  	case SAE_COMMITTED:
  		sae_clear_retransmit_timer(hapd, sta);
  		if (auth_transaction == 1) {
  			if (sae_process_commit(sta->sae) < 0)
  				return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  			ret = auth_sae_send_confirm(hapd, sta, bssid);
  			if (ret)
  				return ret;
  			sta->sae->state = SAE_CONFIRMED;
  			sta->sae->sync = 0;
  			sae_set_retransmit_timer(hapd, sta);
  		} else if (hapd->conf->mesh & MESH_ENABLED) {
  			/*
  			 * In mesh case, follow SAE finite state machine and
  			 * send Commit now, if sync count allows.
  			 */
  			if (sae_check_big_sync(sta))
  				return WLAN_STATUS_SUCCESS;
  			sta->sae->sync++;
  
  			ret = auth_sae_send_commit(hapd, sta, bssid, 0);
  			if (ret)
  				return ret;
  
  			sae_set_retransmit_timer(hapd, sta);
  		} else {
  			/*
  			 * For instructure BSS, send the postponed Confirm from
  			 * Nothing -> Confirmed transition that was reduced to
  			 * Nothing -> Committed above.
  			 */
  			ret = auth_sae_send_confirm(hapd, sta, bssid);
  			if (ret)
  				return ret;
  
  			sta->sae->state = SAE_CONFIRMED;
  
  			/*
  			 * Since this was triggered on Confirm RX, run another
  			 * step to get to Accepted without waiting for
  			 * additional events.
  			 */
  			return sae_sm_step(hapd, sta, bssid, auth_transaction);
  		}
  		break;
  	case SAE_CONFIRMED:
  		sae_clear_retransmit_timer(hapd, sta);
  		if (auth_transaction == 1) {
  			if (sae_check_big_sync(sta))
  				return WLAN_STATUS_SUCCESS;
  			sta->sae->sync++;
  
  			ret = auth_sae_send_commit(hapd, sta, bssid, 1);
  			if (ret)
  				return ret;
  
  			if (sae_process_commit(sta->sae) < 0)
  				return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  			ret = auth_sae_send_confirm(hapd, sta, bssid);
  			if (ret)
  				return ret;
  
  			sae_set_retransmit_timer(hapd, sta);
  		} else {
  			sae_accept_sta(hapd, sta);
  		}
  		break;
  	case SAE_ACCEPTED:
  		if (auth_transaction == 1) {
  			wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR
  				   ") doing reauthentication",
  				   MAC2STR(sta->addr));
  			ap_free_sta(hapd, sta);
  			wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
  		} else {
  			if (sae_check_big_sync(sta))
  				return WLAN_STATUS_SUCCESS;
  			sta->sae->sync++;
  
  			ret = auth_sae_send_confirm(hapd, sta, bssid);
  			sae_clear_temp_data(sta->sae);
  			if (ret)
  				return ret;
  		}
  		break;
  	default:
  		wpa_printf(MSG_ERROR, "SAE: invalid state %d",
  			   sta->sae->state);
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  	return WLAN_STATUS_SUCCESS;
  }
  
  
  static void sae_pick_next_group(struct hostapd_data *hapd, struct sta_info *sta)
  {
  	struct sae_data *sae = sta->sae;
  	int i, *groups = hapd->conf->sae_groups;
  
  	if (sae->state != SAE_COMMITTED)
  		return;
  
  	wpa_printf(MSG_DEBUG, "SAE: Previously selected group: %d", sae->group);
  
  	for (i = 0; groups && groups[i] > 0; i++) {
  		if (sae->group == groups[i])
  			break;
  	}
  
  	if (!groups || groups[i] <= 0) {
  		wpa_printf(MSG_DEBUG,
  			   "SAE: Previously selected group not found from the current configuration");
  		return;
  	}
  
  	for (;;) {
  		i++;
  		if (groups[i] <= 0) {
  			wpa_printf(MSG_DEBUG,
  				   "SAE: No alternative group enabled");
  			return;
  		}
  
  		if (sae_set_group(sae, groups[i]) < 0)
  			continue;
  
  		break;
  	}
  	wpa_printf(MSG_DEBUG, "SAE: Selected new group: %d", groups[i]);
  }
  
  
  static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
  			    const struct ieee80211_mgmt *mgmt, size_t len,
  			    u16 auth_transaction, u16 status_code)
  {
  	int resp = WLAN_STATUS_SUCCESS;
  	struct wpabuf *data = NULL;
  
  	if (!sta->sae) {
  		if (auth_transaction != 1 ||
  		    status_code != WLAN_STATUS_SUCCESS) {
  			resp = -1;
  			goto remove_sta;
  		}
  		sta->sae = os_zalloc(sizeof(*sta->sae));
  		if (!sta->sae) {
  			resp = -1;
  			goto remove_sta;
  		}
  		sta->sae->state = SAE_NOTHING;
  		sta->sae->sync = 0;
  	}
  
  	if (sta->mesh_sae_pmksa_caching) {
  		wpa_printf(MSG_DEBUG,
  			   "SAE: Cancel use of mesh PMKSA caching because peer starts SAE authentication");
  		wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
  		sta->mesh_sae_pmksa_caching = 0;
  	}
  
  	if (auth_transaction == 1) {
  		const u8 *token = NULL, *pos, *end;
  		size_t token_len = 0;
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "start SAE authentication (RX commit, status=%u)",
  			       status_code);
  
  		if ((hapd->conf->mesh & MESH_ENABLED) &&
  		    status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
  		    sta->sae->tmp) {
  			pos = mgmt->u.auth.variable;
  			end = ((const u8 *) mgmt) + len;
  			if (pos + sizeof(le16) > end) {
  				wpa_printf(MSG_ERROR,
  					   "SAE: Too short anti-clogging token request");
  				resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  				goto reply;
  			}
  			resp = sae_group_allowed(sta->sae,
  						 hapd->conf->sae_groups,
  						 WPA_GET_LE16(pos));
  			if (resp != WLAN_STATUS_SUCCESS) {
  				wpa_printf(MSG_ERROR,
  					   "SAE: Invalid group in anti-clogging token request");
  				goto reply;
  			}
  			pos += sizeof(le16);
  
  			wpabuf_free(sta->sae->tmp->anti_clogging_token);
  			sta->sae->tmp->anti_clogging_token =
  				wpabuf_alloc_copy(pos, end - pos);
  			if (sta->sae->tmp->anti_clogging_token == NULL) {
  				wpa_printf(MSG_ERROR,
  					   "SAE: Failed to alloc for anti-clogging token");
  				resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  				goto remove_sta;
  			}
  
  			/*
  			 * IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code
  			 * is 76, a new Commit Message shall be constructed
  			 * with the Anti-Clogging Token from the received
  			 * Authentication frame, and the commit-scalar and
  			 * COMMIT-ELEMENT previously sent.
  			 */
  			resp = auth_sae_send_commit(hapd, sta, mgmt->bssid, 0);
  			if (resp != WLAN_STATUS_SUCCESS) {
  				wpa_printf(MSG_ERROR,
  					   "SAE: Failed to send commit message");
  				goto remove_sta;
  			}
  			sta->sae->state = SAE_COMMITTED;
  			sta->sae->sync = 0;
  			sae_set_retransmit_timer(hapd, sta);
  			return;
  		}
  
  		if ((hapd->conf->mesh & MESH_ENABLED) &&
  		    status_code ==
  		    WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
  		    sta->sae->tmp) {
  			wpa_printf(MSG_DEBUG,
  				   "SAE: Peer did not accept our SAE group");
  			sae_pick_next_group(hapd, sta);
  			goto remove_sta;
  		}
  
  		if (status_code != WLAN_STATUS_SUCCESS)
  			goto remove_sta;
  
  		resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable,
  					((const u8 *) mgmt) + len -
  					mgmt->u.auth.variable, &token,
  					&token_len, hapd->conf->sae_groups);
  		if (resp == SAE_SILENTLY_DISCARD) {
  			wpa_printf(MSG_DEBUG,
  				   "SAE: Drop commit message from " MACSTR " due to reflection attack",
  				   MAC2STR(sta->addr));
  			goto remove_sta;
  		}
  		if (token && check_sae_token(hapd, sta->addr, token, token_len)
  		    < 0) {
  			wpa_printf(MSG_DEBUG, "SAE: Drop commit message with "
  				   "incorrect token from " MACSTR,
  				   MAC2STR(sta->addr));
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto remove_sta;
  		}
  
  		if (resp != WLAN_STATUS_SUCCESS)
  			goto reply;
  
  		if (!token && use_sae_anti_clogging(hapd)) {
  			wpa_printf(MSG_DEBUG,
  				   "SAE: Request anti-clogging token from "
  				   MACSTR, MAC2STR(sta->addr));
  			data = auth_build_token_req(hapd, sta->sae->group,
  						    sta->addr);
  			resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
  			if (hapd->conf->mesh & MESH_ENABLED)
  				sta->sae->state = SAE_NOTHING;
  			goto reply;
  		}
  
  		resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
  	} else if (auth_transaction == 2) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "SAE authentication (RX confirm, status=%u)",
  			       status_code);
  		if (status_code != WLAN_STATUS_SUCCESS)
  			goto remove_sta;
  		if (sta->sae->state >= SAE_CONFIRMED ||
  		    !(hapd->conf->mesh & MESH_ENABLED)) {
  			if (sae_check_confirm(sta->sae, mgmt->u.auth.variable,
  					      ((u8 *) mgmt) + len -
  					      mgmt->u.auth.variable) < 0) {
  				resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  				goto reply;
  			}
  		}
  		resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
  	} else {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "unexpected SAE authentication transaction %u (status=%u)",
  			       auth_transaction, status_code);
  		if (status_code != WLAN_STATUS_SUCCESS)
  			goto remove_sta;
  		resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
  	}
  
  reply:
  	if (resp != WLAN_STATUS_SUCCESS) {
  		send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
  				auth_transaction, resp,
  				data ? wpabuf_head(data) : (u8 *) "",
  				data ? wpabuf_len(data) : 0);
  	}
  
  remove_sta:
  	if (sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS ||
  				   status_code != WLAN_STATUS_SUCCESS)) {
  		hostapd_drv_sta_remove(hapd, sta->addr);
  		sta->added_unassoc = 0;
  	}
  	wpabuf_free(data);
  }
  
  
  /**
   * auth_sae_init_committed - Send COMMIT and start SAE in committed state
   * @hapd: BSS data for the device initiating the authentication
   * @sta: the peer to which commit authentication frame is sent
   *
   * This function implements Init event handling (IEEE Std 802.11-2012,
   * 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the
   * sta->sae structure should be initialized appropriately via a call to
   * sae_prepare_commit().
   */
  int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta)
  {
  	int ret;
  
  	if (!sta->sae || !sta->sae->tmp)
  		return -1;
  
  	if (sta->sae->state != SAE_NOTHING)
  		return -1;
  
  	ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
  	if (ret)
  		return -1;
  
  	sta->sae->state = SAE_COMMITTED;
  	sta->sae->sync = 0;
  	sae_set_retransmit_timer(hapd, sta);
  
  	return 0;
  }
  
  #endif /* CONFIG_SAE */
  
  
  static u16 wpa_res_to_status_code(int res)
  {
  	if (res == WPA_INVALID_GROUP)
  		return WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
  	if (res == WPA_INVALID_PAIRWISE)
  		return WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
  	if (res == WPA_INVALID_AKMP)
  		return WLAN_STATUS_AKMP_NOT_VALID;
  	if (res == WPA_ALLOC_FAIL)
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  #ifdef CONFIG_IEEE80211W
  	if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
  		return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
  	if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
  		return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
  #endif /* CONFIG_IEEE80211W */
  	if (res == WPA_INVALID_MDIE)
  		return WLAN_STATUS_INVALID_MDIE;
  	if (res != WPA_IE_OK)
  		return WLAN_STATUS_INVALID_IE;
  	return WLAN_STATUS_SUCCESS;
  }
  
  
  #ifdef CONFIG_FILS
  
  static void handle_auth_fils_finish(struct hostapd_data *hapd,
  				    struct sta_info *sta, u16 resp,
  				    struct wpabuf *data, int pub);
  
  void handle_auth_fils(struct hostapd_data *hapd, struct sta_info *sta,
  		      const u8 *pos, size_t len, u16 auth_alg,
  		      u16 auth_transaction, u16 status_code,
  		      void (*cb)(struct hostapd_data *hapd,
  				 struct sta_info *sta, u16 resp,
  				 struct wpabuf *data, int pub))
  {
  	u16 resp = WLAN_STATUS_SUCCESS;
  	const u8 *end;
  	struct ieee802_11_elems elems;
  	int res;
  	struct wpa_ie_data rsn;
  	struct rsn_pmksa_cache_entry *pmksa = NULL;
  
  	if (auth_transaction != 1 || status_code != WLAN_STATUS_SUCCESS)
  		return;
  
  	end = pos + len;
  
  	wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields",
  		    pos, end - pos);
  
  	/* TODO: FILS PK */
  #ifdef CONFIG_FILS_SK_PFS
  	if (auth_alg == WLAN_AUTH_FILS_SK_PFS) {
  		u16 group;
  		struct wpabuf *pub;
  		size_t elem_len;
  
  		/* Using FILS PFS */
  
  		/* Finite Cyclic Group */
  		if (end - pos < 2) {
  			wpa_printf(MSG_DEBUG,
  				   "FILS: No room for Finite Cyclic Group");
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  		group = WPA_GET_LE16(pos);
  		pos += 2;
  		if (group != hapd->conf->fils_dh_group) {
  			wpa_printf(MSG_DEBUG,
  				   "FILS: Unsupported Finite Cyclic Group: %u (expected %u)",
  				   group, hapd->conf->fils_dh_group);
  			resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
  			goto fail;
  		}
  
  		crypto_ecdh_deinit(sta->fils_ecdh);
  		sta->fils_ecdh = crypto_ecdh_init(group);
  		if (!sta->fils_ecdh) {
  			wpa_printf(MSG_INFO,
  				   "FILS: Could not initialize ECDH with group %d",
  				   group);
  			resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
  			goto fail;
  		}
  
  		pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1);
  		if (!pub) {
  			wpa_printf(MSG_DEBUG,
  				   "FILS: Failed to derive ECDH public key");
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  		elem_len = wpabuf_len(pub);
  		wpabuf_free(pub);
  
  		/* Element */
  		if ((size_t) (end - pos) < elem_len) {
  			wpa_printf(MSG_DEBUG, "FILS: No room for Element");
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  
  		wpabuf_free(sta->fils_g_sta);
  		sta->fils_g_sta = wpabuf_alloc_copy(pos, elem_len);
  		wpabuf_clear_free(sta->fils_dh_ss);
  		sta->fils_dh_ss = crypto_ecdh_set_peerkey(sta->fils_ecdh, 1,
  							  pos, elem_len);
  		if (!sta->fils_dh_ss) {
  			wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed");
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  		wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", sta->fils_dh_ss);
  		pos += elem_len;
  	} else {
  		crypto_ecdh_deinit(sta->fils_ecdh);
  		sta->fils_ecdh = NULL;
  		wpabuf_clear_free(sta->fils_dh_ss);
  		sta->fils_dh_ss = NULL;
  	}
  #endif /* CONFIG_FILS_SK_PFS */
  
  	wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos);
  	if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) {
  		wpa_printf(MSG_DEBUG, "FILS: Could not parse elements");
  		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  
  	/* RSNE */
  	wpa_hexdump(MSG_DEBUG, "FILS: RSN element",
  		    elems.rsn_ie, elems.rsn_ie_len);
  	if (!elems.rsn_ie ||
  	    wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
  				 &rsn) < 0) {
  		wpa_printf(MSG_DEBUG, "FILS: No valid RSN element");
  		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  
  	if (!sta->wpa_sm)
  		sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr,
  						NULL);
  	if (!sta->wpa_sm) {
  		wpa_printf(MSG_DEBUG,
  			   "FILS: Failed to initialize RSN state machine");
  		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  
  	res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
  				  elems.rsn_ie - 2, elems.rsn_ie_len + 2,
  				  elems.mdie, elems.mdie_len, NULL, 0);
  	resp = wpa_res_to_status_code(res);
  	if (resp != WLAN_STATUS_SUCCESS)
  		goto fail;
  
  	if (!elems.fils_nonce) {
  		wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field");
  		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  	wpa_hexdump(MSG_DEBUG, "FILS: SNonce", elems.fils_nonce,
  		    FILS_NONCE_LEN);
  	os_memcpy(sta->fils_snonce, elems.fils_nonce, FILS_NONCE_LEN);
  
  	/* PMKID List */
  	if (rsn.pmkid && rsn.num_pmkid > 0) {
  		u8 num;
  		const u8 *pmkid;
  
  		wpa_hexdump(MSG_DEBUG, "FILS: PMKID List",
  			    rsn.pmkid, rsn.num_pmkid * PMKID_LEN);
  
  		pmkid = rsn.pmkid;
  		num = rsn.num_pmkid;
  		while (num) {
  			wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN);
  			pmksa = wpa_auth_pmksa_get(hapd->wpa_auth, sta->addr,
  						   pmkid);
  			if (pmksa)
  				break;
  			pmksa = wpa_auth_pmksa_get_fils_cache_id(hapd->wpa_auth,
  								 sta->addr,
  								 pmkid);
  			if (pmksa)
  				break;
  			pmkid += PMKID_LEN;
  			num--;
  		}
  	}
  	if (pmksa && wpa_auth_sta_key_mgmt(sta->wpa_sm) != pmksa->akmp) {
  		wpa_printf(MSG_DEBUG,
  			   "FILS: Matching PMKSA cache entry has different AKMP (0x%x != 0x%x) - ignore",
  			   wpa_auth_sta_key_mgmt(sta->wpa_sm), pmksa->akmp);
  		pmksa = NULL;
  	}
  	if (pmksa)
  		wpa_printf(MSG_DEBUG, "FILS: Found matching PMKSA cache entry");
  
  	/* FILS Session */
  	if (!elems.fils_session) {
  		wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
  		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  	wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session,
  		    FILS_SESSION_LEN);
  	os_memcpy(sta->fils_session, elems.fils_session, FILS_SESSION_LEN);
  
  	/* FILS Wrapped Data */
  	if (elems.fils_wrapped_data) {
  		wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data",
  			    elems.fils_wrapped_data,
  			    elems.fils_wrapped_data_len);
  		if (!pmksa) {
  #ifndef CONFIG_NO_RADIUS
  			if (!sta->eapol_sm) {
  				sta->eapol_sm =
  					ieee802_1x_alloc_eapol_sm(hapd, sta);
  			}
  			wpa_printf(MSG_DEBUG,
  				   "FILS: Forward EAP-Identity/Re-auth Start to authentication server");
  			ieee802_1x_encapsulate_radius(
  				hapd, sta, elems.fils_wrapped_data,
  				elems.fils_wrapped_data_len);
  			sta->fils_pending_cb = cb;
  			wpa_printf(MSG_DEBUG,
  				   "FILS: Will send Authentication frame once the response from authentication server is available");
  			sta->flags |= WLAN_STA_PENDING_FILS_ERP;
  			return;
  #else /* CONFIG_NO_RADIUS */
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  #endif /* CONFIG_NO_RADIUS */
  		}
  	}
  
  fail:
  	if (cb) {
  		struct wpabuf *data;
  		int pub = 0;
  
  		data = prepare_auth_resp_fils(hapd, sta, &resp, pmksa, NULL,
  					      NULL, 0, &pub);
  		if (!data) {
  			wpa_printf(MSG_DEBUG,
  				   "%s: prepare_auth_resp_fils() returned failure",
  				   __func__);
  		}
  
  		cb(hapd, sta, resp, data, pub);
  	}
  }
  
  
  static struct wpabuf *
  prepare_auth_resp_fils(struct hostapd_data *hapd,
  		       struct sta_info *sta, u16 *resp,
  		       struct rsn_pmksa_cache_entry *pmksa,
  		       struct wpabuf *erp_resp,
  		       const u8 *msk, size_t msk_len,
  		       int *is_pub)
  {
  	u8 fils_nonce[FILS_NONCE_LEN];
  	size_t ielen;
  	struct wpabuf *data = NULL;
  	const u8 *ie;
  	u8 *ie_buf = NULL;
  	const u8 *pmk = NULL;
  	size_t pmk_len = 0;
  	u8 pmk_buf[PMK_LEN_MAX];
  	struct wpabuf *pub = NULL;
  
  	if (*resp != WLAN_STATUS_SUCCESS)
  		goto fail;
  
  	ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
  	if (!ie) {
  		*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  
  	if (pmksa) {
  		/* Add PMKID of the selected PMKSA into RSNE */
  		ie_buf = os_malloc(ielen + 2 + 2 + PMKID_LEN);
  		if (!ie_buf) {
  			*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  
  		os_memcpy(ie_buf, ie, ielen);
  		if (wpa_insert_pmkid(ie_buf, &ielen, pmksa->pmkid) < 0) {
  			*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  		ie = ie_buf;
  	}
  
  	if (random_get_bytes(fils_nonce, FILS_NONCE_LEN) < 0) {
  		*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  	wpa_hexdump(MSG_DEBUG, "RSN: Generated FILS Nonce",
  		    fils_nonce, FILS_NONCE_LEN);
  
  #ifdef CONFIG_FILS_SK_PFS
  	if (sta->fils_dh_ss && sta->fils_ecdh) {
  		pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1);
  		if (!pub) {
  			*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  	}
  #endif /* CONFIG_FILS_SK_PFS */
  
  	data = wpabuf_alloc(1000 + ielen + (pub ? wpabuf_len(pub) : 0));
  	if (!data) {
  		*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  
  	/* TODO: FILS PK */
  #ifdef CONFIG_FILS_SK_PFS
  	if (pub) {
  		/* Finite Cyclic Group */
  		wpabuf_put_le16(data, hapd->conf->fils_dh_group);
  
  		/* Element */
  		wpabuf_put_buf(data, pub);
  	}
  #endif /* CONFIG_FILS_SK_PFS */
  
  	/* RSNE */
  	wpabuf_put_data(data, ie, ielen);
  
  	/* MDE when using FILS+FT (already included in ie,ielen with RSNE) */
  
  #ifdef CONFIG_IEEE80211R_AP
  	if (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm))) {
  		/* FTE[R1KH-ID,R0KH-ID] when using FILS+FT */
  		int res;
  
  		res = wpa_auth_write_fte(hapd->wpa_auth, wpabuf_put(data, 0),
  					 wpabuf_tailroom(data));
  		if (res < 0) {
  			*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  		wpabuf_put(data, res);
  	}
  #endif /* CONFIG_IEEE80211R_AP */
  
  	/* FILS Nonce */
  	wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
  	wpabuf_put_u8(data, 1 + FILS_NONCE_LEN); /* Length */
  	/* Element ID Extension */
  	wpabuf_put_u8(data, WLAN_EID_EXT_FILS_NONCE);
  	wpabuf_put_data(data, fils_nonce, FILS_NONCE_LEN);
  
  	/* FILS Session */
  	wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
  	wpabuf_put_u8(data, 1 + FILS_SESSION_LEN); /* Length */
  	/* Element ID Extension */
  	wpabuf_put_u8(data, WLAN_EID_EXT_FILS_SESSION);
  	wpabuf_put_data(data, sta->fils_session, FILS_SESSION_LEN);
  
  	/* FILS Wrapped Data */
  	if (!pmksa && erp_resp) {
  		wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
  		wpabuf_put_u8(data, 1 + wpabuf_len(erp_resp)); /* Length */
  		/* Element ID Extension */
  		wpabuf_put_u8(data, WLAN_EID_EXT_FILS_WRAPPED_DATA);
  		wpabuf_put_buf(data, erp_resp);
  
  		if (fils_rmsk_to_pmk(wpa_auth_sta_key_mgmt(sta->wpa_sm),
  				     msk, msk_len, sta->fils_snonce, fils_nonce,
  				     sta->fils_dh_ss ?
  				     wpabuf_head(sta->fils_dh_ss) : NULL,
  				     sta->fils_dh_ss ?
  				     wpabuf_len(sta->fils_dh_ss) : 0,
  				     pmk_buf, &pmk_len)) {
  			wpa_printf(MSG_DEBUG, "FILS: Failed to derive PMK");
  			*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			wpabuf_free(data);
  			data = NULL;
  			goto fail;
  		}
  		pmk = pmk_buf;
  	} else if (pmksa) {
  		pmk = pmksa->pmk;
  		pmk_len = pmksa->pmk_len;
  	}
  
  	if (!pmk) {
  		wpa_printf(MSG_DEBUG, "FILS: No PMK available");
  		*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		wpabuf_free(data);
  		data = NULL;
  		goto fail;
  	}
  
  	if (fils_auth_pmk_to_ptk(sta->wpa_sm, pmk, pmk_len,
  				 sta->fils_snonce, fils_nonce,
  				 sta->fils_g_sta, pub) < 0) {
  		*resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		wpabuf_free(data);
  		data = NULL;
  		goto fail;
  	}
  
  fail:
  	if (is_pub)
  		*is_pub = pub != NULL;
  	os_free(ie_buf);
  	wpabuf_free(pub);
  	wpabuf_clear_free(sta->fils_dh_ss);
  	sta->fils_dh_ss = NULL;
  #ifdef CONFIG_FILS_SK_PFS
  	crypto_ecdh_deinit(sta->fils_ecdh);
  	sta->fils_ecdh = NULL;
  #endif /* CONFIG_FILS_SK_PFS */
  	return data;
  }
  
  
  static void handle_auth_fils_finish(struct hostapd_data *hapd,
  				    struct sta_info *sta, u16 resp,
  				    struct wpabuf *data, int pub)
  {
  	u16 auth_alg;
  
  	auth_alg = (pub ||
  		    resp == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED) ?
  		WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK;
  	send_auth_reply(hapd, sta->addr, hapd->own_addr, auth_alg, 2, resp,
  			data ? wpabuf_head(data) : (u8 *) "",
  			data ? wpabuf_len(data) : 0);
  	wpabuf_free(data);
  
  	if (resp == WLAN_STATUS_SUCCESS) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "authentication OK (FILS)");
  		sta->flags |= WLAN_STA_AUTH;
  		wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
  		sta->auth_alg = pub ? WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK;
  		mlme_authenticate_indication(hapd, sta);
  	}
  }
  
  
  void ieee802_11_finish_fils_auth(struct hostapd_data *hapd,
  				 struct sta_info *sta, int success,
  				 struct wpabuf *erp_resp,
  				 const u8 *msk, size_t msk_len)
  {
  	struct wpabuf *data;
  	int pub = 0;
  	u16 resp;
  
  	sta->flags &= ~WLAN_STA_PENDING_FILS_ERP;
  
  	if (!sta->fils_pending_cb)
  		return;
  	resp = success ? WLAN_STATUS_SUCCESS : WLAN_STATUS_UNSPECIFIED_FAILURE;
  	data = prepare_auth_resp_fils(hapd, sta, &resp, NULL, erp_resp,
  				      msk, msk_len, &pub);
  	if (!data) {
  		wpa_printf(MSG_DEBUG,
  			   "%s: prepare_auth_resp_fils() returned failure",
  			   __func__);
  	}
  	sta->fils_pending_cb(hapd, sta, resp, data, pub);
  }
  
  #endif /* CONFIG_FILS */
  
  
  static int
  ieee802_11_allowed_address(struct hostapd_data *hapd, const u8 *addr,
  			   const u8 *msg, size_t len, u32 *session_timeout,
  			   u32 *acct_interim_interval,
  			   struct vlan_description *vlan_id,
  			   struct hostapd_sta_wpa_psk_short **psk,
  			   char **identity, char **radius_cui)
  {
  	int res;
  
  	os_memset(vlan_id, 0, sizeof(*vlan_id));
  	res = hostapd_allowed_address(hapd, addr, msg, len,
  				      session_timeout, acct_interim_interval,
  				      vlan_id, psk, identity, radius_cui);
  
  	if (res == HOSTAPD_ACL_REJECT) {
  		wpa_printf(MSG_INFO,
  			   "Station " MACSTR " not allowed to authenticate",
  			   MAC2STR(addr));
  		return HOSTAPD_ACL_REJECT;
  	}
  
  	if (res == HOSTAPD_ACL_PENDING) {
  		wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
  			   " waiting for an external authentication",
  			   MAC2STR(addr));
  		/* Authentication code will re-send the authentication frame
  		 * after it has received (and cached) information from the
  		 * external source. */
  		return HOSTAPD_ACL_PENDING;
  	}
  
  	return res;
  }
  
  
  static int
  ieee802_11_set_radius_info(struct hostapd_data *hapd, struct sta_info *sta,
  			   int res, u32 session_timeout,
  			   u32 acct_interim_interval,
  			   struct vlan_description *vlan_id,
  			   struct hostapd_sta_wpa_psk_short **psk,
  			   char **identity, char **radius_cui)
  {
  	if (vlan_id->notempty &&
  	    !hostapd_vlan_valid(hapd->conf->vlan, vlan_id)) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
  			       HOSTAPD_LEVEL_INFO,
  			       "Invalid VLAN %d%s received from RADIUS server",
  			       vlan_id->untagged,
  			       vlan_id->tagged[0] ? "+" : "");
  		return -1;
  	}
  	if (ap_sta_set_vlan(hapd, sta, vlan_id) < 0)
  		return -1;
  	if (sta->vlan_id)
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
  			       HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
  
  	hostapd_free_psk_list(sta->psk);
  	if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) {
  		sta->psk = *psk;
  		*psk = NULL;
  	} else {
  		sta->psk = NULL;
  	}
  
  	sta->identity = *identity;
  	*identity = NULL;
  	sta->radius_cui = *radius_cui;
  	*radius_cui = NULL;
  
  	if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
  		sta->acct_interim_interval = acct_interim_interval;
  	if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
  		ap_sta_session_timeout(hapd, sta, session_timeout);
  	else
  		ap_sta_no_session_timeout(hapd, sta);
  
  	return 0;
  }
  
  
  static void handle_auth(struct hostapd_data *hapd,
  			const struct ieee80211_mgmt *mgmt, size_t len)
  {
  	u16 auth_alg, auth_transaction, status_code;
  	u16 resp = WLAN_STATUS_SUCCESS;
  	struct sta_info *sta = NULL;
  	int res, reply_res;
  	u16 fc;
  	const u8 *challenge = NULL;
  	u32 session_timeout, acct_interim_interval;
  	struct vlan_description vlan_id;
  	struct hostapd_sta_wpa_psk_short *psk = NULL;
  	u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
  	size_t resp_ies_len = 0;
  	char *identity = NULL;
  	char *radius_cui = NULL;
  	u16 seq_ctrl;
  
  	if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
  		wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)",
  			   (unsigned long) len);
  		return;
  	}
  
  #ifdef CONFIG_TESTING_OPTIONS
  	if (hapd->iconf->ignore_auth_probability > 0.0 &&
  	    drand48() < hapd->iconf->ignore_auth_probability) {
  		wpa_printf(MSG_INFO,
  			   "TESTING: ignoring auth frame from " MACSTR,
  			   MAC2STR(mgmt->sa));
  		return;
  	}
  #endif /* CONFIG_TESTING_OPTIONS */
  
  	auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
  	auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
  	status_code = le_to_host16(mgmt->u.auth.status_code);
  	fc = le_to_host16(mgmt->frame_control);
  	seq_ctrl = le_to_host16(mgmt->seq_ctrl);
  
  	if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
  	    2 + WLAN_AUTH_CHALLENGE_LEN &&
  	    mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
  	    mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
  		challenge = &mgmt->u.auth.variable[2];
  
  	wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
  		   "auth_transaction=%d status_code=%d wep=%d%s "
  		   "seq_ctrl=0x%x%s",
  		   MAC2STR(mgmt->sa), auth_alg, auth_transaction,
  		   status_code, !!(fc & WLAN_FC_ISWEP),
  		   challenge ? " challenge" : "",
  		   seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
  
  #ifdef CONFIG_NO_RC4
  	if (auth_alg == WLAN_AUTH_SHARED_KEY) {
  		wpa_printf(MSG_INFO,
  			   "Unsupported authentication algorithm (%d)",
  			   auth_alg);
  		resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
  		goto fail;
  	}
  #endif /* CONFIG_NO_RC4 */
  
  	if (hapd->tkip_countermeasures) {
  		resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
  		goto fail;
  	}
  
  	if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
  	       auth_alg == WLAN_AUTH_OPEN) ||
  #ifdef CONFIG_IEEE80211R_AP
  	      (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
  	       auth_alg == WLAN_AUTH_FT) ||
  #endif /* CONFIG_IEEE80211R_AP */
  #ifdef CONFIG_SAE
  	      (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
  	       auth_alg == WLAN_AUTH_SAE) ||
  #endif /* CONFIG_SAE */
  #ifdef CONFIG_FILS
  	      (hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) &&
  	       auth_alg == WLAN_AUTH_FILS_SK) ||
  	      (hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) &&
  	       hapd->conf->fils_dh_group &&
  	       auth_alg == WLAN_AUTH_FILS_SK_PFS) ||
  #endif /* CONFIG_FILS */
  	      ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
  	       auth_alg == WLAN_AUTH_SHARED_KEY))) {
  		wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)",
  			   auth_alg);
  		resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
  		goto fail;
  	}
  
  	if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE ||
  	      (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
  		wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)",
  			   auth_transaction);
  		resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
  		goto fail;
  	}
  
  	if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
  		wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
  			   MAC2STR(mgmt->sa));
  		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  
  	if (hapd->conf->no_auth_if_seen_on) {
  		struct hostapd_data *other;
  
  		other = sta_track_seen_on(hapd->iface, mgmt->sa,
  					  hapd->conf->no_auth_if_seen_on);
  		if (other) {
  			u8 *pos;
  			u32 info;
  			u8 op_class, channel, phytype;
  
  			wpa_printf(MSG_DEBUG, "%s: Reject authentication from "
  				   MACSTR " since STA has been seen on %s",
  				   hapd->conf->iface, MAC2STR(mgmt->sa),
  				   hapd->conf->no_auth_if_seen_on);
  
  			resp = WLAN_STATUS_REJECTED_WITH_SUGGESTED_BSS_TRANSITION;
  			pos = &resp_ies[0];
  			*pos++ = WLAN_EID_NEIGHBOR_REPORT;
  			*pos++ = 13;
  			os_memcpy(pos, other->own_addr, ETH_ALEN);
  			pos += ETH_ALEN;
  			info = 0; /* TODO: BSSID Information */
  			WPA_PUT_LE32(pos, info);
  			pos += 4;
  			if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD)
  				phytype = 8; /* dmg */
  			else if (other->iconf->ieee80211ac)
  				phytype = 9; /* vht */
  			else if (other->iconf->ieee80211n)
  				phytype = 7; /* ht */
  			else if (other->iconf->hw_mode ==
  				 HOSTAPD_MODE_IEEE80211A)
  				phytype = 4; /* ofdm */
  			else if (other->iconf->hw_mode ==
  				 HOSTAPD_MODE_IEEE80211G)
  				phytype = 6; /* erp */
  			else
  				phytype = 5; /* hrdsss */
  			if (ieee80211_freq_to_channel_ext(
  				    hostapd_hw_get_freq(other,
  							other->iconf->channel),
  				    other->iconf->secondary_channel,
  				    other->iconf->ieee80211ac,
  				    &op_class, &channel) == NUM_HOSTAPD_MODES) {
  				op_class = 0;
  				channel = other->iconf->channel;
  			}
  			*pos++ = op_class;
  			*pos++ = channel;
  			*pos++ = phytype;
  			resp_ies_len = pos - &resp_ies[0];
  			goto fail;
  		}
  	}
  
  	res = ieee802_11_allowed_address(
  		hapd, mgmt->sa, (const u8 *) mgmt, len, &session_timeout,
  		&acct_interim_interval, &vlan_id, &psk, &identity, &radius_cui);
  	if (res == HOSTAPD_ACL_REJECT) {
  		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  	if (res == HOSTAPD_ACL_PENDING)
  		return;
  
  	sta = ap_get_sta(hapd, mgmt->sa);
  	if (sta) {
  		sta->flags &= ~WLAN_STA_PENDING_FILS_ERP;
  		if ((fc & WLAN_FC_RETRY) &&
  		    sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
  		    sta->last_seq_ctrl == seq_ctrl &&
  		    sta->last_subtype == WLAN_FC_STYPE_AUTH) {
  			hostapd_logger(hapd, sta->addr,
  				       HOSTAPD_MODULE_IEEE80211,
  				       HOSTAPD_LEVEL_DEBUG,
  				       "Drop repeated authentication frame seq_ctrl=0x%x",
  				       seq_ctrl);
  			return;
  		}
  #ifdef CONFIG_MESH
  		if ((hapd->conf->mesh & MESH_ENABLED) &&
  		    sta->plink_state == PLINK_BLOCKED) {
  			wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
  				   " is blocked - drop Authentication frame",
  				   MAC2STR(mgmt->sa));
  			return;
  		}
  #endif /* CONFIG_MESH */
  	} else {
  #ifdef CONFIG_MESH
  		if (hapd->conf->mesh & MESH_ENABLED) {
  			/* if the mesh peer is not available, we don't do auth.
  			 */
  			wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
  				   " not yet known - drop Authentication frame",
  				   MAC2STR(mgmt->sa));
  			/*
  			 * Save a copy of the frame so that it can be processed
  			 * if a new peer entry is added shortly after this.
  			 */
  			wpabuf_free(hapd->mesh_pending_auth);
  			hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len);
  			os_get_reltime(&hapd->mesh_pending_auth_time);
  			return;
  		}
  #endif /* CONFIG_MESH */
  
  		sta = ap_sta_add(hapd, mgmt->sa);
  		if (!sta) {
  			resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
  			goto fail;
  		}
  	}
  	sta->last_seq_ctrl = seq_ctrl;
  	sta->last_subtype = WLAN_FC_STYPE_AUTH;
  
  	res = ieee802_11_set_radius_info(
  		hapd, sta, res, session_timeout, acct_interim_interval,
  		&vlan_id, &psk, &identity, &radius_cui);
  	if (res) {
  		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto fail;
  	}
  
  	sta->flags &= ~WLAN_STA_PREAUTH;
  	ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
  
  	/*
  	 * If the driver supports full AP client state, add a station to the
  	 * driver before sending authentication reply to make sure the driver
  	 * has resources, and not to go through the entire authentication and
  	 * association handshake, and fail it at the end.
  	 *
  	 * If this is not the first transaction, in a multi-step authentication
  	 * algorithm, the station already exists in the driver
  	 * (sta->added_unassoc = 1) so skip it.
  	 *
  	 * In mesh mode, the station was already added to the driver when the
  	 * NEW_PEER_CANDIDATE event is received.
  	 *
  	 * If PMF was negotiated for the existing association, skip this to
  	 * avoid dropping the STA entry and the associated keys. This is needed
  	 * to allow the original connection work until the attempt can complete
  	 * (re)association, so that unprotected Authentication frame cannot be
  	 * used to bypass PMF protection.
  	 */
  	if (FULL_AP_CLIENT_STATE_SUPP(hapd->iface->drv_flags) &&
  	    (!(sta->flags & WLAN_STA_MFP) || !ap_sta_is_authorized(sta)) &&
  	    !(hapd->conf->mesh & MESH_ENABLED) &&
  	    !(sta->added_unassoc)) {
  		/*
  		 * If a station that is already associated to the AP, is trying
  		 * to authenticate again, remove the STA entry, in order to make
  		 * sure the STA PS state gets cleared and configuration gets
  		 * updated. To handle this, station's added_unassoc flag is
  		 * cleared once the station has completed association.
  		 */
  		hostapd_drv_sta_remove(hapd, sta->addr);
  		sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_AUTH |
  				WLAN_STA_AUTHORIZED);
  
  		if (hostapd_sta_add(hapd, sta->addr, 0, 0, NULL, 0, 0,
  				    NULL, NULL, sta->flags, 0, 0, 0, 0)) {
  			hostapd_logger(hapd, sta->addr,
  				       HOSTAPD_MODULE_IEEE80211,
  				       HOSTAPD_LEVEL_NOTICE,
  				       "Could not add STA to kernel driver");
  			resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
  			goto fail;
  		}
  
  		sta->added_unassoc = 1;
  	}
  
  	switch (auth_alg) {
  	case WLAN_AUTH_OPEN:
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "authentication OK (open system)");
  		sta->flags |= WLAN_STA_AUTH;
  		wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
  		sta->auth_alg = WLAN_AUTH_OPEN;
  		mlme_authenticate_indication(hapd, sta);
  		break;
  #ifndef CONFIG_NO_RC4
  	case WLAN_AUTH_SHARED_KEY:
  		resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
  				       fc & WLAN_FC_ISWEP);
  		sta->auth_alg = WLAN_AUTH_SHARED_KEY;
  		mlme_authenticate_indication(hapd, sta);
  		if (sta->challenge && auth_transaction == 1) {
  			resp_ies[0] = WLAN_EID_CHALLENGE;
  			resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
  			os_memcpy(resp_ies + 2, sta->challenge,
  				  WLAN_AUTH_CHALLENGE_LEN);
  			resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
  		}
  		break;
  #endif /* CONFIG_NO_RC4 */
  #ifdef CONFIG_IEEE80211R_AP
  	case WLAN_AUTH_FT:
  		sta->auth_alg = WLAN_AUTH_FT;
  		if (sta->wpa_sm == NULL)
  			sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
  							sta->addr, NULL);
  		if (sta->wpa_sm == NULL) {
  			wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
  				   "state machine");
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  		wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
  				    auth_transaction, mgmt->u.auth.variable,
  				    len - IEEE80211_HDRLEN -
  				    sizeof(mgmt->u.auth),
  				    handle_auth_ft_finish, hapd);
  		/* handle_auth_ft_finish() callback will complete auth. */
  		return;
  #endif /* CONFIG_IEEE80211R_AP */
  #ifdef CONFIG_SAE
  	case WLAN_AUTH_SAE:
  #ifdef CONFIG_MESH
  		if (status_code == WLAN_STATUS_SUCCESS &&
  		    hapd->conf->mesh & MESH_ENABLED) {
  			if (sta->wpa_sm == NULL)
  				sta->wpa_sm =
  					wpa_auth_sta_init(hapd->wpa_auth,
  							  sta->addr, NULL);
  			if (sta->wpa_sm == NULL) {
  				wpa_printf(MSG_DEBUG,
  					   "SAE: Failed to initialize WPA state machine");
  				resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  				goto fail;
  			}
  		}
  #endif /* CONFIG_MESH */
  		handle_auth_sae(hapd, sta, mgmt, len, auth_transaction,
  				status_code);
  		return;
  #endif /* CONFIG_SAE */
  #ifdef CONFIG_FILS
  	case WLAN_AUTH_FILS_SK:
  	case WLAN_AUTH_FILS_SK_PFS:
  		handle_auth_fils(hapd, sta, mgmt->u.auth.variable,
  				 len - IEEE80211_HDRLEN - sizeof(mgmt->u.auth),
  				 auth_alg, auth_transaction, status_code,
  				 handle_auth_fils_finish);
  		return;
  #endif /* CONFIG_FILS */
  	}
  
   fail:
  	os_free(identity);
  	os_free(radius_cui);
  	hostapd_free_psk_list(psk);
  
  	reply_res = send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
  				    auth_transaction + 1, resp, resp_ies,
  				    resp_ies_len);
  
  	if (sta && sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS ||
  					  reply_res != WLAN_STATUS_SUCCESS)) {
  		hostapd_drv_sta_remove(hapd, sta->addr);
  		sta->added_unassoc = 0;
  	}
  }
  
  
  int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
  {
  	int i, j = 32, aid;
  
  	/* get a unique AID */
  	if (sta->aid > 0) {
  		wpa_printf(MSG_DEBUG, "  old AID %d", sta->aid);
  		return 0;
  	}
  
  	if (TEST_FAIL())
  		return -1;
  
  	for (i = 0; i < AID_WORDS; i++) {
  		if (hapd->sta_aid[i] == (u32) -1)
  			continue;
  		for (j = 0; j < 32; j++) {
  			if (!(hapd->sta_aid[i] & BIT(j)))
  				break;
  		}
  		if (j < 32)
  			break;
  	}
  	if (j == 32)
  		return -1;
  	aid = i * 32 + j + 1;
  	if (aid > 2007)
  		return -1;
  
  	sta->aid = aid;
  	hapd->sta_aid[i] |= BIT(j);
  	wpa_printf(MSG_DEBUG, "  new AID %d", sta->aid);
  	return 0;
  }
  
  
  static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
  		      const u8 *ssid_ie, size_t ssid_ie_len)
  {
  	if (ssid_ie == NULL)
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  	if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
  	    os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_INFO,
  			       "Station tried to associate with unknown SSID "
  			       "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len));
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	return WLAN_STATUS_SUCCESS;
  }
  
  
  static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
  		     const u8 *wmm_ie, size_t wmm_ie_len)
  {
  	sta->flags &= ~WLAN_STA_WMM;
  	sta->qosinfo = 0;
  	if (wmm_ie && hapd->conf->wmm_enabled) {
  		struct wmm_information_element *wmm;
  
  		if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) {
  			hostapd_logger(hapd, sta->addr,
  				       HOSTAPD_MODULE_WPA,
  				       HOSTAPD_LEVEL_DEBUG,
  				       "invalid WMM element in association "
  				       "request");
  			return WLAN_STATUS_UNSPECIFIED_FAILURE;
  		}
  
  		sta->flags |= WLAN_STA_WMM;
  		wmm = (struct wmm_information_element *) wmm_ie;
  		sta->qosinfo = wmm->qos_info;
  	}
  	return WLAN_STATUS_SUCCESS;
  }
  
  
  static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
  			   struct ieee802_11_elems *elems)
  {
  	/* Supported rates not used in IEEE 802.11ad/DMG */
  	if (hapd->iface->current_mode &&
  	    hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD)
  		return WLAN_STATUS_SUCCESS;
  
  	if (!elems->supp_rates) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "No supported rates element in AssocReq");
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	if (elems->supp_rates_len + elems->ext_supp_rates_len >
  	    sizeof(sta->supported_rates)) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "Invalid supported rates element length %d+%d",
  			       elems->supp_rates_len,
  			       elems->ext_supp_rates_len);
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	sta->supported_rates_len = merge_byte_arrays(
  		sta->supported_rates, sizeof(sta->supported_rates),
  		elems->supp_rates, elems->supp_rates_len,
  		elems->ext_supp_rates, elems->ext_supp_rates_len);
  
  	return WLAN_STATUS_SUCCESS;
  }
  
  
  static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta,
  			   const u8 *ext_capab_ie, size_t ext_capab_ie_len)
  {
  #ifdef CONFIG_INTERWORKING
  	/* check for QoS Map support */
  	if (ext_capab_ie_len >= 5) {
  		if (ext_capab_ie[4] & 0x01)
  			sta->qos_map_enabled = 1;
  	}
  #endif /* CONFIG_INTERWORKING */
  
  	if (ext_capab_ie_len > 0)
  		sta->ecsa_supported = !!(ext_capab_ie[0] & BIT(2));
  
  	return WLAN_STATUS_SUCCESS;
  }
  
  
  #ifdef CONFIG_OWE
  static u16 owe_process_assoc_req(struct sta_info *sta, const u8 *owe_dh,
  				 u8 owe_dh_len)
  {
  	struct wpabuf *secret, *pub, *hkey;
  	int res;
  	u8 prk[SHA256_MAC_LEN], pmkid[SHA256_MAC_LEN];
  	const char *info = "OWE Key Generation";
  	const u8 *addr[2];
  	size_t len[2];
  
  	if (WPA_GET_LE16(owe_dh) != OWE_DH_GROUP)
  		return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
  
  	crypto_ecdh_deinit(sta->owe_ecdh);
  	sta->owe_ecdh = crypto_ecdh_init(OWE_DH_GROUP);
  	if (!sta->owe_ecdh)
  		return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
  
  	secret = crypto_ecdh_set_peerkey(sta->owe_ecdh, 0, owe_dh + 2,
  					 owe_dh_len - 2);
  	if (!secret) {
  		wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key");
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  	wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret);
  
  	/* prk = HKDF-extract(C | A | group, z) */
  
  	pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
  	if (!pub) {
  		wpabuf_clear_free(secret);
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	/* PMKID = Truncate-128(Hash(C | A)) */
  	addr[0] = owe_dh + 2;
  	len[0] = owe_dh_len - 2;
  	addr[1] = wpabuf_head(pub);
  	len[1] = wpabuf_len(pub);
  	res = sha256_vector(2, addr, len, pmkid);
  	if (res < 0) {
  		wpabuf_free(pub);
  		wpabuf_clear_free(secret);
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	hkey = wpabuf_alloc(owe_dh_len - 2 + wpabuf_len(pub) + 2);
  	if (!hkey) {
  		wpabuf_free(pub);
  		wpabuf_clear_free(secret);
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	wpabuf_put_data(hkey, owe_dh + 2, owe_dh_len - 2); /* C */
  	wpabuf_put_buf(hkey, pub); /* A */
  	wpabuf_free(pub);
  	wpabuf_put_le16(hkey, OWE_DH_GROUP); /* group */
  	res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey),
  			  wpabuf_head(secret), wpabuf_len(secret), prk);
  	wpabuf_clear_free(hkey);
  	wpabuf_clear_free(secret);
  	if (res < 0)
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  
  	wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, SHA256_MAC_LEN);
  
  	/* PMK = HKDF-expand(prk, "OWE Key Generation", n) */
  
  	os_free(sta->owe_pmk);
  	sta->owe_pmk = os_malloc(PMK_LEN);
  	if (!sta->owe_pmk) {
  		os_memset(prk, 0, SHA256_MAC_LEN);
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	res = hmac_sha256_kdf(prk, SHA256_MAC_LEN, NULL, (const u8 *) info,
  			      os_strlen(info), sta->owe_pmk, PMK_LEN);
  	os_memset(prk, 0, SHA256_MAC_LEN);
  	if (res < 0) {
  		os_free(sta->owe_pmk);
  		sta->owe_pmk = NULL;
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sta->owe_pmk, PMK_LEN);
  	wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN);
  	/* TODO: Add PMKSA cache entry */
  
  	return WLAN_STATUS_SUCCESS;
  }
  #endif /* CONFIG_OWE */
  
  
  static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
  			   const u8 *ies, size_t ies_len, int reassoc)
  {
  	struct ieee802_11_elems elems;
  	u16 resp;
  	const u8 *wpa_ie;
  	size_t wpa_ie_len;
  	const u8 *p2p_dev_addr = NULL;
  
  	if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_INFO, "Station sent an invalid "
  			       "association request");
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  	resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
  	if (resp != WLAN_STATUS_SUCCESS)
  		return resp;
  	resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
  	if (resp != WLAN_STATUS_SUCCESS)
  		return resp;
  	resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len);
  	if (resp != WLAN_STATUS_SUCCESS)
  		return resp;
  	resp = copy_supp_rates(hapd, sta, &elems);
  	if (resp != WLAN_STATUS_SUCCESS)
  		return resp;
  #ifdef CONFIG_IEEE80211N
  	resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities);
  	if (resp != WLAN_STATUS_SUCCESS)
  		return resp;
  	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
  	    !(sta->flags & WLAN_STA_HT)) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_INFO, "Station does not support "
  			       "mandatory HT PHY - reject association");
  		return WLAN_STATUS_ASSOC_DENIED_NO_HT;
  	}
  #endif /* CONFIG_IEEE80211N */
  
  #ifdef CONFIG_IEEE80211AC
  	if (hapd->iconf->ieee80211ac) {
  		resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities);
  		if (resp != WLAN_STATUS_SUCCESS)
  			return resp;
  
  		resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif);
  		if (resp != WLAN_STATUS_SUCCESS)
  			return resp;
  	}
  
  	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
  	    !(sta->flags & WLAN_STA_VHT)) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_INFO, "Station does not support "
  			       "mandatory VHT PHY - reject association");
  		return WLAN_STATUS_ASSOC_DENIED_NO_VHT;
  	}
  
  	if (hapd->conf->vendor_vht && !elems.vht_capabilities) {
  		resp = copy_sta_vendor_vht(hapd, sta, elems.vendor_vht,
  					   elems.vendor_vht_len);
  		if (resp != WLAN_STATUS_SUCCESS)
  			return resp;
  	}
  #endif /* CONFIG_IEEE80211AC */
  
  #ifdef CONFIG_P2P
  	if (elems.p2p) {
  		wpabuf_free(sta->p2p_ie);
  		sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
  							  P2P_IE_VENDOR_TYPE);
  		if (sta->p2p_ie)
  			p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
  	} else {
  		wpabuf_free(sta->p2p_ie);
  		sta->p2p_ie = NULL;
  	}
  #endif /* CONFIG_P2P */
  
  	if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
  		wpa_ie = elems.rsn_ie;
  		wpa_ie_len = elems.rsn_ie_len;
  	} else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
  		   elems.wpa_ie) {
  		wpa_ie = elems.wpa_ie;
  		wpa_ie_len = elems.wpa_ie_len;
  	} else {
  		wpa_ie = NULL;
  		wpa_ie_len = 0;
  	}
  
  #ifdef CONFIG_WPS
  	sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
  	if (hapd->conf->wps_state && elems.wps_ie) {
  		wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
  			   "Request - assume WPS is used");
  		sta->flags |= WLAN_STA_WPS;
  		wpabuf_free(sta->wps_ie);
  		sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
  							  WPS_IE_VENDOR_TYPE);
  		if (sta->wps_ie && wps_is_20(sta->wps_ie)) {
  			wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0");
  			sta->flags |= WLAN_STA_WPS2;
  		}
  		wpa_ie = NULL;
  		wpa_ie_len = 0;
  		if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
  			wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
  				   "(Re)Association Request - reject");
  			return WLAN_STATUS_INVALID_IE;
  		}
  	} else if (hapd->conf->wps_state && wpa_ie == NULL) {
  		wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
  			   "(Re)Association Request - possible WPS use");
  		sta->flags |= WLAN_STA_MAYBE_WPS;
  	} else
  #endif /* CONFIG_WPS */
  	if (hapd->conf->wpa && wpa_ie == NULL) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_INFO,
  			       "No WPA/RSN IE in association request");
  		return WLAN_STATUS_INVALID_IE;
  	}
  
  	if (hapd->conf->wpa && wpa_ie) {
  		int res;
  		wpa_ie -= 2;
  		wpa_ie_len += 2;
  		if (sta->wpa_sm == NULL)
  			sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
  							sta->addr,
  							p2p_dev_addr);
  		if (sta->wpa_sm == NULL) {
  			wpa_printf(MSG_WARNING, "Failed to initialize WPA "
  				   "state machine");
  			return WLAN_STATUS_UNSPECIFIED_FAILURE;
  		}
  		res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
  					  wpa_ie, wpa_ie_len,
  					  elems.mdie, elems.mdie_len,
  					  elems.owe_dh, elems.owe_dh_len);
  		resp = wpa_res_to_status_code(res);
  		if (resp != WLAN_STATUS_SUCCESS)
  			return resp;
  #ifdef CONFIG_IEEE80211W
  		if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
  		    sta->sa_query_count > 0)
  			ap_check_sa_query_timeout(hapd, sta);
  		if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
  		    (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
  			/*
  			 * STA has already been associated with MFP and SA
  			 * Query timeout has not been reached. Reject the
  			 * association attempt temporarily and start SA Query,
  			 * if one is not pending.
  			 */
  
  			if (sta->sa_query_count == 0)
  				ap_sta_start_sa_query(hapd, sta);
  
  			return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
  		}
  
  		if (wpa_auth_uses_mfp(sta->wpa_sm))
  			sta->flags |= WLAN_STA_MFP;
  		else
  			sta->flags &= ~WLAN_STA_MFP;
  #endif /* CONFIG_IEEE80211W */
  
  #ifdef CONFIG_IEEE80211R_AP
  		if (sta->auth_alg == WLAN_AUTH_FT) {
  			if (!reassoc) {
  				wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
  					   "to use association (not "
  					   "re-association) with FT auth_alg",
  					   MAC2STR(sta->addr));
  				return WLAN_STATUS_UNSPECIFIED_FAILURE;
  			}
  
  			resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
  						       ies_len);
  			if (resp != WLAN_STATUS_SUCCESS)
  				return resp;
  		}
  #endif /* CONFIG_IEEE80211R_AP */
  
  #ifdef CONFIG_SAE
  		if (wpa_auth_uses_sae(sta->wpa_sm) &&
  		    sta->auth_alg == WLAN_AUTH_OPEN) {
  			struct rsn_pmksa_cache_entry *sa;
  			sa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
  			if (!sa || sa->akmp != WPA_KEY_MGMT_SAE) {
  				wpa_printf(MSG_DEBUG,
  					   "SAE: No PMKSA cache entry found for "
  					   MACSTR, MAC2STR(sta->addr));
  				return WLAN_STATUS_INVALID_PMKID;
  			}
  			wpa_printf(MSG_DEBUG, "SAE: " MACSTR
  				   " using PMKSA caching", MAC2STR(sta->addr));
  		} else if (wpa_auth_uses_sae(sta->wpa_sm) &&
  			   sta->auth_alg != WLAN_AUTH_SAE &&
  			   !(sta->auth_alg == WLAN_AUTH_FT &&
  			     wpa_auth_uses_ft_sae(sta->wpa_sm))) {
  			wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use "
  				   "SAE AKM after non-SAE auth_alg %u",
  				   MAC2STR(sta->addr), sta->auth_alg);
  			return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
  		}
  #endif /* CONFIG_SAE */
  
  #ifdef CONFIG_OWE
  		if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
  		    wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE &&
  		    elems.owe_dh) {
  			resp = owe_process_assoc_req(sta, elems.owe_dh,
  						     elems.owe_dh_len);
  			if (resp != WLAN_STATUS_SUCCESS)
  				return resp;
  		}
  #endif /* CONFIG_OWE */
  
  #ifdef CONFIG_IEEE80211N
  		if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) &&
  		    wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
  			hostapd_logger(hapd, sta->addr,
  				       HOSTAPD_MODULE_IEEE80211,
  				       HOSTAPD_LEVEL_INFO,
  				       "Station tried to use TKIP with HT "
  				       "association");
  			return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
  		}
  #endif /* CONFIG_IEEE80211N */
  #ifdef CONFIG_HS20
  	} else if (hapd->conf->osen) {
  		if (elems.osen == NULL) {
  			hostapd_logger(
  				hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  				HOSTAPD_LEVEL_INFO,
  				"No HS 2.0 OSEN element in association request");
  			return WLAN_STATUS_INVALID_IE;
  		}
  
  		wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
  		if (sta->wpa_sm == NULL)
  			sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
  							sta->addr, NULL);
  		if (sta->wpa_sm == NULL) {
  			wpa_printf(MSG_WARNING, "Failed to initialize WPA "
  				   "state machine");
  			return WLAN_STATUS_UNSPECIFIED_FAILURE;
  		}
  		if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
  				      elems.osen - 2, elems.osen_len + 2) < 0)
  			return WLAN_STATUS_INVALID_IE;
  #endif /* CONFIG_HS20 */
  	} else
  		wpa_auth_sta_no_wpa(sta->wpa_sm);
  
  #ifdef CONFIG_P2P
  	p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
  #endif /* CONFIG_P2P */
  
  #ifdef CONFIG_HS20
  	wpabuf_free(sta->hs20_ie);
  	if (elems.hs20 && elems.hs20_len > 4) {
  		sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
  						 elems.hs20_len - 4);
  	} else
  		sta->hs20_ie = NULL;
  #endif /* CONFIG_HS20 */
  
  #ifdef CONFIG_FST
  	wpabuf_free(sta->mb_ies);
  	if (hapd->iface->fst)
  		sta->mb_ies = mb_ies_by_info(&elems.mb_ies);
  	else
  		sta->mb_ies = NULL;
  #endif /* CONFIG_FST */
  
  #ifdef CONFIG_MBO
  	mbo_ap_check_sta_assoc(hapd, sta, &elems);
  
  	if (hapd->conf->mbo_enabled && (hapd->conf->wpa & 2) &&
  	    elems.mbo && sta->cell_capa && !(sta->flags & WLAN_STA_MFP) &&
  	    hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
  		wpa_printf(MSG_INFO,
  			   "MBO: Reject WPA2 association without PMF");
  		return WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  #endif /* CONFIG_MBO */
  
  	ap_copy_sta_supp_op_classes(sta, elems.supp_op_classes,
  				    elems.supp_op_classes_len);
  
  	if ((sta->capability & WLAN_CAPABILITY_RADIO_MEASUREMENT) &&
  	    elems.rrm_enabled &&
  	    elems.rrm_enabled_len >= sizeof(sta->rrm_enabled_capa))
  		os_memcpy(sta->rrm_enabled_capa, elems.rrm_enabled,
  			  sizeof(sta->rrm_enabled_capa));
  
  	return WLAN_STATUS_SUCCESS;
  }
  
  
  static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
  			u16 reason_code)
  {
  	int send_len;
  	struct ieee80211_mgmt reply;
  
  	os_memset(&reply, 0, sizeof(reply));
  	reply.frame_control =
  		IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
  	os_memcpy(reply.da, addr, ETH_ALEN);
  	os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
  	os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
  
  	send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
  	reply.u.deauth.reason_code = host_to_le16(reason_code);
  
  	if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0)
  		wpa_printf(MSG_INFO, "Failed to send deauth: %s",
  			   strerror(errno));
  }
  
  
  static int add_associated_sta(struct hostapd_data *hapd,
  			      struct sta_info *sta)
  {
  	struct ieee80211_ht_capabilities ht_cap;
  	struct ieee80211_vht_capabilities vht_cap;
  
  	/*
  	 * Remove the STA entry to ensure the STA PS state gets cleared and
  	 * configuration gets updated. This is relevant for cases, such as
  	 * FT-over-the-DS, where a station re-associates back to the same AP but
  	 * skips the authentication flow, or if working with a driver that
  	 * does not support full AP client state.
  	 */
  	if (!sta->added_unassoc)
  		hostapd_drv_sta_remove(hapd, sta->addr);
  
  #ifdef CONFIG_IEEE80211N
  	if (sta->flags & WLAN_STA_HT)
  		hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
  #endif /* CONFIG_IEEE80211N */
  #ifdef CONFIG_IEEE80211AC
  	if (sta->flags & WLAN_STA_VHT)
  		hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap);
  #endif /* CONFIG_IEEE80211AC */
  
  	/*
  	 * Add the station with forced WLAN_STA_ASSOC flag. The sta->flags
  	 * will be set when the ACK frame for the (Re)Association Response frame
  	 * is processed (TX status driver event).
  	 */
  	if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
  			    sta->supported_rates, sta->supported_rates_len,
  			    sta->listen_interval,
  			    sta->flags & WLAN_STA_HT ? &ht_cap : NULL,
  			    sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
  			    sta->flags | WLAN_STA_ASSOC, sta->qosinfo,
  			    sta->vht_opmode, sta->p2p_ie ? 1 : 0,
  			    sta->added_unassoc)) {
  		hostapd_logger(hapd, sta->addr,
  			       HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE,
  			       "Could not %s STA to kernel driver",
  			       sta->added_unassoc ? "set" : "add");
  
  		if (sta->added_unassoc) {
  			hostapd_drv_sta_remove(hapd, sta->addr);
  			sta->added_unassoc = 0;
  		}
  
  		return -1;
  	}
  
  	sta->added_unassoc = 0;
  
  	return 0;
  }
  
  
  static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
  			   const u8 *addr, u16 status_code, int reassoc,
  			   const u8 *ies, size_t ies_len)
  {
  	int send_len;
  	u8 *buf;
  	size_t buflen;
  	struct ieee80211_mgmt *reply;
  	u8 *p;
  	u16 res = WLAN_STATUS_SUCCESS;
  
  	buflen = sizeof(struct ieee80211_mgmt) + 1024;
  #ifdef CONFIG_FILS
  	if (sta && sta->fils_hlp_resp)
  		buflen += wpabuf_len(sta->fils_hlp_resp);
  #endif /* CONFIG_FILS */
  #ifdef CONFIG_OWE
  	if (sta && (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE))
  		buflen += 50;
  #endif /* CONFIG_OWE */
  	buf = os_zalloc(buflen);
  	if (!buf) {
  		res = WLAN_STATUS_UNSPECIFIED_FAILURE;
  		goto done;
  	}
  	reply = (struct ieee80211_mgmt *) buf;
  	reply->frame_control =
  		IEEE80211_FC(WLAN_FC_TYPE_MGMT,
  			     (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
  			      WLAN_FC_STYPE_ASSOC_RESP));
  	os_memcpy(reply->da, addr, ETH_ALEN);
  	os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
  	os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
  
  	send_len = IEEE80211_HDRLEN;
  	send_len += sizeof(reply->u.assoc_resp);
  	reply->u.assoc_resp.capab_info =
  		host_to_le16(hostapd_own_capab_info(hapd));
  	reply->u.assoc_resp.status_code = host_to_le16(status_code);
  
  	reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) |
  					       BIT(14) | BIT(15));
  	/* Supported rates */
  	p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
  	/* Extended supported rates */
  	p = hostapd_eid_ext_supp_rates(hapd, p);
  
  #ifdef CONFIG_IEEE80211R_AP
  	if (sta && status_code == WLAN_STATUS_SUCCESS) {
  		/* IEEE 802.11r: Mobility Domain Information, Fast BSS
  		 * Transition Information, RSN, [RIC Response] */
  		p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
  						buf + buflen - p,
  						sta->auth_alg, ies, ies_len);
  	}
  #endif /* CONFIG_IEEE80211R_AP */
  
  #ifdef CONFIG_IEEE80211W
  	if (sta && status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
  		p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
  #endif /* CONFIG_IEEE80211W */
  
  #ifdef CONFIG_IEEE80211N
  	p = hostapd_eid_ht_capabilities(hapd, p);
  	p = hostapd_eid_ht_operation(hapd, p);
  #endif /* CONFIG_IEEE80211N */
  
  #ifdef CONFIG_IEEE80211AC
  	if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
  		u32 nsts = 0, sta_nsts;
  
  		if (sta && hapd->conf->use_sta_nsts && sta->vht_capabilities) {
  			struct ieee80211_vht_capabilities *capa;
  
  			nsts = (hapd->iface->conf->vht_capab >>
  				VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
  			capa = sta->vht_capabilities;
  			sta_nsts = (le_to_host32(capa->vht_capabilities_info) >>
  				    VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
  
  			if (nsts < sta_nsts)
  				nsts = 0;
  			else
  				nsts = sta_nsts;
  		}
  		p = hostapd_eid_vht_capabilities(hapd, p, nsts);
  		p = hostapd_eid_vht_operation(hapd, p);
  	}
  #endif /* CONFIG_IEEE80211AC */
  
  	p = hostapd_eid_ext_capab(hapd, p);
  	p = hostapd_eid_bss_max_idle_period(hapd, p);
  	if (sta && sta->qos_map_enabled)
  		p = hostapd_eid_qos_map_set(hapd, p);
  
  #ifdef CONFIG_FST
  	if (hapd->iface->fst_ies) {
  		os_memcpy(p, wpabuf_head(hapd->iface->fst_ies),
  			  wpabuf_len(hapd->iface->fst_ies));
  		p += wpabuf_len(hapd->iface->fst_ies);
  	}
  #endif /* CONFIG_FST */
  
  #ifdef CONFIG_IEEE80211AC
  	if (sta && hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT))
  		p = hostapd_eid_vendor_vht(hapd, p);
  #endif /* CONFIG_IEEE80211AC */
  
  	if (sta && (sta->flags & WLAN_STA_WMM))
  		p = hostapd_eid_wmm(hapd, p);
  
  #ifdef CONFIG_WPS
  	if (sta &&
  	    ((sta->flags & WLAN_STA_WPS) ||
  	     ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa))) {
  		struct wpabuf *wps = wps_build_assoc_resp_ie();
  		if (wps) {
  			os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
  			p += wpabuf_len(wps);
  			wpabuf_free(wps);
  		}
  	}
  #endif /* CONFIG_WPS */
  
  #ifdef CONFIG_P2P
  	if (sta && sta->p2p_ie && hapd->p2p_group) {
  		struct wpabuf *p2p_resp_ie;
  		enum p2p_status_code status;
  		switch (status_code) {
  		case WLAN_STATUS_SUCCESS:
  			status = P2P_SC_SUCCESS;
  			break;
  		case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
  			status = P2P_SC_FAIL_LIMIT_REACHED;
  			break;
  		default:
  			status = P2P_SC_FAIL_INVALID_PARAMS;
  			break;
  		}
  		p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
  		if (p2p_resp_ie) {
  			os_memcpy(p, wpabuf_head(p2p_resp_ie),
  				  wpabuf_len(p2p_resp_ie));
  			p += wpabuf_len(p2p_resp_ie);
  			wpabuf_free(p2p_resp_ie);
  		}
  	}
  #endif /* CONFIG_P2P */
  
  #ifdef CONFIG_P2P_MANAGER
  	if (hapd->conf->p2p & P2P_MANAGE)
  		p = hostapd_eid_p2p_manage(hapd, p);
  #endif /* CONFIG_P2P_MANAGER */
  
  	p = hostapd_eid_mbo(hapd, p, buf + buflen - p);
  
  	if (hapd->conf->assocresp_elements &&
  	    (size_t) (buf + buflen - p) >=
  	    wpabuf_len(hapd->conf->assocresp_elements)) {
  		os_memcpy(p, wpabuf_head(hapd->conf->assocresp_elements),
  			  wpabuf_len(hapd->conf->assocresp_elements));
  		p += wpabuf_len(hapd->conf->assocresp_elements);
  	}
  
  	send_len += p - reply->u.assoc_resp.variable;
  
  #ifdef CONFIG_FILS
  	if (sta &&
  	    (sta->auth_alg == WLAN_AUTH_FILS_SK ||
  	     sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
  	     sta->auth_alg == WLAN_AUTH_FILS_PK) &&
  	    status_code == WLAN_STATUS_SUCCESS) {
  		struct ieee802_11_elems elems;
  
  		if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) ==
  		    ParseFailed || !elems.fils_session) {
  			res = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto done;
  		}
  
  		/* FILS Session */
  		*p++ = WLAN_EID_EXTENSION; /* Element ID */
  		*p++ = 1 + FILS_SESSION_LEN; /* Length */
  		*p++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
  		os_memcpy(p, elems.fils_session, FILS_SESSION_LEN);
  		send_len += 2 + 1 + FILS_SESSION_LEN;
  
  		send_len = fils_encrypt_assoc(sta->wpa_sm, buf, send_len,
  					      buflen, sta->fils_hlp_resp);
  		if (send_len < 0) {
  			res = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto done;
  		}
  	}
  #endif /* CONFIG_FILS */
  
  #ifdef CONFIG_OWE
  	if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
  	    sta && sta->owe_ecdh &&
  	    wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE) {
  		struct wpabuf *pub;
  
  		pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
  		if (!pub) {
  			res = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto done;
  		}
  		/* OWE Diffie-Hellman Parameter element */
  		*p++ = WLAN_EID_EXTENSION; /* Element ID */
  		*p++ = 1 + 2 + wpabuf_len(pub); /* Length */
  		*p++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension */
  		WPA_PUT_LE16(p, OWE_DH_GROUP);
  		p += 2;
  		os_memcpy(p, wpabuf_head(pub), wpabuf_len(pub));
  		p += wpabuf_len(pub);
  		send_len += 3 + 2 + wpabuf_len(pub);
  		wpabuf_free(pub);
  	}
  #endif /* CONFIG_OWE */
  
  	if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0) {
  		wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
  			   strerror(errno));
  		res = WLAN_STATUS_UNSPECIFIED_FAILURE;
  	}
  
  done:
  	os_free(buf);
  	return res;
  }
  
  
  #ifdef CONFIG_FILS
  
  void fils_hlp_finish_assoc(struct hostapd_data *hapd, struct sta_info *sta)
  {
  	u16 reply_res;
  
  	wpa_printf(MSG_DEBUG, "FILS: Finish association with " MACSTR,
  		   MAC2STR(sta->addr));
  	eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
  	if (!sta->fils_pending_assoc_req)
  		return;
  	reply_res = send_assoc_resp(hapd, sta, sta->addr, WLAN_STATUS_SUCCESS,
  				    sta->fils_pending_assoc_is_reassoc,
  				    sta->fils_pending_assoc_req,
  				    sta->fils_pending_assoc_req_len);
  	os_free(sta->fils_pending_assoc_req);
  	sta->fils_pending_assoc_req = NULL;
  	sta->fils_pending_assoc_req_len = 0;
  	wpabuf_free(sta->fils_hlp_resp);
  	sta->fils_hlp_resp = NULL;
  	wpabuf_free(sta->hlp_dhcp_discover);
  	sta->hlp_dhcp_discover = NULL;
  
  	/*
  	 * Remove the station in case tranmission of a success response fails
  	 * (the STA was added associated to the driver) or if the station was
  	 * previously added unassociated.
  	 */
  	if (reply_res != WLAN_STATUS_SUCCESS || sta->added_unassoc) {
  		hostapd_drv_sta_remove(hapd, sta->addr);
  		sta->added_unassoc = 0;
  	}
  }
  
  
  void fils_hlp_timeout(void *eloop_ctx, void *eloop_data)
  {
  	struct hostapd_data *hapd = eloop_ctx;
  	struct sta_info *sta = eloop_data;
  
  	wpa_printf(MSG_DEBUG,
  		   "FILS: HLP response timeout - continue with association response for "
  		   MACSTR, MAC2STR(sta->addr));
  	fils_hlp_finish_assoc(hapd, sta);
  }
  
  #endif /* CONFIG_FILS */
  
  
  static void handle_assoc(struct hostapd_data *hapd,
  			 const struct ieee80211_mgmt *mgmt, size_t len,
  			 int reassoc)
  {
  	u16 capab_info, listen_interval, seq_ctrl, fc;
  	u16 resp = WLAN_STATUS_SUCCESS, reply_res;
  	const u8 *pos;
  	int left, i;
  	struct sta_info *sta;
  	u8 *tmp = NULL;
  	struct hostapd_sta_wpa_psk_short *psk = NULL;
  	char *identity = NULL;
  	char *radius_cui = NULL;
  #ifdef CONFIG_FILS
  	int delay_assoc = 0;
  #endif /* CONFIG_FILS */
  
  	if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
  				      sizeof(mgmt->u.assoc_req))) {
  		wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)",
  			   reassoc, (unsigned long) len);
  		return;
  	}
  
  #ifdef CONFIG_TESTING_OPTIONS
  	if (reassoc) {
  		if (hapd->iconf->ignore_reassoc_probability > 0.0 &&
  		    drand48() < hapd->iconf->ignore_reassoc_probability) {
  			wpa_printf(MSG_INFO,
  				   "TESTING: ignoring reassoc request from "
  				   MACSTR, MAC2STR(mgmt->sa));
  			return;
  		}
  	} else {
  		if (hapd->iconf->ignore_assoc_probability > 0.0 &&
  		    drand48() < hapd->iconf->ignore_assoc_probability) {
  			wpa_printf(MSG_INFO,
  				   "TESTING: ignoring assoc request from "
  				   MACSTR, MAC2STR(mgmt->sa));
  			return;
  		}
  	}
  #endif /* CONFIG_TESTING_OPTIONS */
  
  	fc = le_to_host16(mgmt->frame_control);
  	seq_ctrl = le_to_host16(mgmt->seq_ctrl);
  
  	if (reassoc) {
  		capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
  		listen_interval = le_to_host16(
  			mgmt->u.reassoc_req.listen_interval);
  		wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
  			   " capab_info=0x%02x listen_interval=%d current_ap="
  			   MACSTR " seq_ctrl=0x%x%s",
  			   MAC2STR(mgmt->sa), capab_info, listen_interval,
  			   MAC2STR(mgmt->u.reassoc_req.current_ap),
  			   seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
  		left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
  		pos = mgmt->u.reassoc_req.variable;
  	} else {
  		capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
  		listen_interval = le_to_host16(
  			mgmt->u.assoc_req.listen_interval);
  		wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
  			   " capab_info=0x%02x listen_interval=%d "
  			   "seq_ctrl=0x%x%s",
  			   MAC2STR(mgmt->sa), capab_info, listen_interval,
  			   seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
  		left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
  		pos = mgmt->u.assoc_req.variable;
  	}
  
  	sta = ap_get_sta(hapd, mgmt->sa);
  #ifdef CONFIG_IEEE80211R_AP
  	if (sta && sta->auth_alg == WLAN_AUTH_FT &&
  	    (sta->flags & WLAN_STA_AUTH) == 0) {
  		wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
  			   "prior to authentication since it is using "
  			   "over-the-DS FT", MAC2STR(mgmt->sa));
  
  		/*
  		 * Mark station as authenticated, to avoid adding station
  		 * entry in the driver as associated and not authenticated
  		 */
  		sta->flags |= WLAN_STA_AUTH;
  	} else
  #endif /* CONFIG_IEEE80211R_AP */
  	if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
  		if (hapd->iface->current_mode &&
  		    hapd->iface->current_mode->mode ==
  			HOSTAPD_MODE_IEEE80211AD) {
  			int acl_res;
  			u32 session_timeout, acct_interim_interval;
  			struct vlan_description vlan_id;
  
  			acl_res = ieee802_11_allowed_address(
  				hapd, mgmt->sa, (const u8 *) mgmt, len,
  				&session_timeout, &acct_interim_interval,
  				&vlan_id, &psk, &identity, &radius_cui);
  			if (acl_res == HOSTAPD_ACL_REJECT) {
  				resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  				goto fail;
  			}
  			if (acl_res == HOSTAPD_ACL_PENDING)
  				return;
  
  			/* DMG/IEEE 802.11ad does not use authentication.
  			 * Allocate sta entry upon association. */
  			sta = ap_sta_add(hapd, mgmt->sa);
  			if (!sta) {
  				hostapd_logger(hapd, mgmt->sa,
  					       HOSTAPD_MODULE_IEEE80211,
  					       HOSTAPD_LEVEL_INFO,
  					       "Failed to add STA");
  				resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
  				goto fail;
  			}
  
  			acl_res = ieee802_11_set_radius_info(
  				hapd, sta, acl_res, session_timeout,
  				acct_interim_interval, &vlan_id, &psk,
  				&identity, &radius_cui);
  			if (acl_res) {
  				resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  				goto fail;
  			}
  
  			hostapd_logger(hapd, sta->addr,
  				       HOSTAPD_MODULE_IEEE80211,
  				       HOSTAPD_LEVEL_DEBUG,
  				       "Skip authentication for DMG/IEEE 802.11ad");
  			sta->flags |= WLAN_STA_AUTH;
  			wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
  			sta->auth_alg = WLAN_AUTH_OPEN;
  		} else {
  			hostapd_logger(hapd, mgmt->sa,
  				       HOSTAPD_MODULE_IEEE80211,
  				       HOSTAPD_LEVEL_INFO,
  				       "Station tried to associate before authentication (aid=%d flags=0x%x)",
  				       sta ? sta->aid : -1,
  				       sta ? sta->flags : 0);
  			send_deauth(hapd, mgmt->sa,
  				    WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
  			return;
  		}
  	}
  
  	if ((fc & WLAN_FC_RETRY) &&
  	    sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
  	    sta->last_seq_ctrl == seq_ctrl &&
  	    sta->last_subtype == (reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
  				  WLAN_FC_STYPE_ASSOC_REQ)) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "Drop repeated association frame seq_ctrl=0x%x",
  			       seq_ctrl);
  		return;
  	}
  	sta->last_seq_ctrl = seq_ctrl;
  	sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
  		WLAN_FC_STYPE_ASSOC_REQ;
  
  	if (hapd->tkip_countermeasures) {
  		resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
  		goto fail;
  	}
  
  	if (listen_interval > hapd->conf->max_listen_interval) {
  		hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "Too large Listen Interval (%d)",
  			       listen_interval);
  		resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
  		goto fail;
  	}
  
  #ifdef CONFIG_MBO
  	if (hapd->conf->mbo_enabled && hapd->mbo_assoc_disallow) {
  		resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
  		goto fail;
  	}
  #endif /* CONFIG_MBO */
  
  	/*
  	 * sta->capability is used in check_assoc_ies() for RRM enabled
  	 * capability element.
  	 */
  	sta->capability = capab_info;
  
  #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) {
  		/* The end of the payload is encrypted. Need to decrypt it
  		 * before parsing. */
  
  		tmp = os_memdup(pos, left);
  		if (!tmp) {
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  
  		left = fils_decrypt_assoc(sta->wpa_sm, sta->fils_session, mgmt,
  					  len, tmp, left);
  		if (left < 0) {
  			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
  			goto fail;
  		}
  		pos = tmp;
  	}
  #endif /* CONFIG_FILS */
  
  	/* followed by SSID and Supported rates; and HT capabilities if 802.11n
  	 * is used */
  	resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
  	if (resp != WLAN_STATUS_SUCCESS)
  		goto fail;
  
  	if (hostapd_get_aid(hapd, sta) < 0) {
  		hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_INFO, "No room for more AIDs");
  		resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
  		goto fail;
  	}
  
  	sta->listen_interval = listen_interval;
  
  	if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
  		sta->flags |= WLAN_STA_NONERP;
  	for (i = 0; i < sta->supported_rates_len; i++) {
  		if ((sta->supported_rates[i] & 0x7f) > 22) {
  			sta->flags &= ~WLAN_STA_NONERP;
  			break;
  		}
  	}
  	if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
  		sta->nonerp_set = 1;
  		hapd->iface->num_sta_non_erp++;
  		if (hapd->iface->num_sta_non_erp == 1)
  			ieee802_11_set_beacons(hapd->iface);
  	}
  
  	if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
  	    !sta->no_short_slot_time_set) {
  		sta->no_short_slot_time_set = 1;
  		hapd->iface->num_sta_no_short_slot_time++;
  		if (hapd->iface->current_mode->mode ==
  		    HOSTAPD_MODE_IEEE80211G &&
  		    hapd->iface->num_sta_no_short_slot_time == 1)
  			ieee802_11_set_beacons(hapd->iface);
  	}
  
  	if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
  		sta->flags |= WLAN_STA_SHORT_PREAMBLE;
  	else
  		sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
  
  	if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
  	    !sta->no_short_preamble_set) {
  		sta->no_short_preamble_set = 1;
  		hapd->iface->num_sta_no_short_preamble++;
  		if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
  		    && hapd->iface->num_sta_no_short_preamble == 1)
  			ieee802_11_set_beacons(hapd->iface);
  	}
  
  #ifdef CONFIG_IEEE80211N
  	update_ht_state(hapd, sta);
  #endif /* CONFIG_IEEE80211N */
  
  	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  		       HOSTAPD_LEVEL_DEBUG,
  		       "association OK (aid %d)", sta->aid);
  	/* Station will be marked associated, after it acknowledges AssocResp
  	 */
  	sta->flags |= WLAN_STA_ASSOC_REQ_OK;
  
  #ifdef CONFIG_IEEE80211W
  	if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
  		wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
  			   "SA Query procedure", reassoc ? "re" : "");
  		/* TODO: Send a protected Disassociate frame to the STA using
  		 * the old key and Reason Code "Previous Authentication no
  		 * longer valid". Make sure this is only sent protected since
  		 * unprotected frame would be received by the STA that is now
  		 * trying to associate.
  		 */
  	}
  #endif /* CONFIG_IEEE80211W */
  
  	/* Make sure that the previously registered inactivity timer will not
  	 * remove the STA immediately. */
  	sta->timeout_next = STA_NULLFUNC;
  
  #ifdef CONFIG_TAXONOMY
  	taxonomy_sta_info_assoc_req(hapd, sta, pos, left);
  #endif /* CONFIG_TAXONOMY */
  
  	sta->pending_wds_enable = 0;
  
  #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) {
  		if (fils_process_hlp(hapd, sta, pos, left) > 0)
  			delay_assoc = 1;
  	}
  #endif /* CONFIG_FILS */
  
   fail:
  	os_free(identity);
  	os_free(radius_cui);
  	hostapd_free_psk_list(psk);
  
  	/*
  	 * In case of a successful response, add the station to the driver.
  	 * Otherwise, the kernel may ignore Data frames before we process the
  	 * ACK frame (TX status). In case of a failure, this station will be
  	 * removed.
  	 *
  	 * Note that this is not compliant with the IEEE 802.11 standard that
  	 * states that a non-AP station should transition into the
  	 * authenticated/associated state only after the station acknowledges
  	 * the (Re)Association Response frame. However, still do this as:
  	 *
  	 * 1. In case the station does not acknowledge the (Re)Association
  	 *    Response frame, it will be removed.
  	 * 2. Data frames will be dropped in the kernel until the station is
  	 *    set into authorized state, and there are no significant known
  	 *    issues with processing other non-Data Class 3 frames during this
  	 *    window.
  	 */
  	if (resp == WLAN_STATUS_SUCCESS && sta && add_associated_sta(hapd, sta))
  		resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
  
  #ifdef CONFIG_FILS
  	if (sta) {
  		eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
  		os_free(sta->fils_pending_assoc_req);
  		sta->fils_pending_assoc_req = NULL;
  		sta->fils_pending_assoc_req_len = 0;
  		wpabuf_free(sta->fils_hlp_resp);
  		sta->fils_hlp_resp = NULL;
  	}
  	if (sta && delay_assoc && resp == WLAN_STATUS_SUCCESS) {
  		sta->fils_pending_assoc_req = tmp;
  		sta->fils_pending_assoc_req_len = left;
  		sta->fils_pending_assoc_is_reassoc = reassoc;
  		wpa_printf(MSG_DEBUG,
  			   "FILS: Waiting for HLP processing before sending (Re)Association Response frame to "
  			   MACSTR, MAC2STR(sta->addr));
  		eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
  		eloop_register_timeout(0, hapd->conf->fils_hlp_wait_time * 1024,
  				       fils_hlp_timeout, hapd, sta);
  		return;
  	}
  #endif /* CONFIG_FILS */
  
  	reply_res = send_assoc_resp(hapd, sta, mgmt->sa, resp, reassoc, pos,
  				    left);
  	os_free(tmp);
  
  	/*
  	 * Remove the station in case tranmission of a success response fails
  	 * (the STA was added associated to the driver) or if the station was
  	 * previously added unassociated.
  	 */
  	if (sta && ((reply_res != WLAN_STATUS_SUCCESS &&
  		     resp == WLAN_STATUS_SUCCESS) || sta->added_unassoc)) {
  		hostapd_drv_sta_remove(hapd, sta->addr);
  		sta->added_unassoc = 0;
  	}
  }
  
  
  static void handle_disassoc(struct hostapd_data *hapd,
  			    const struct ieee80211_mgmt *mgmt, size_t len)
  {
  	struct sta_info *sta;
  
  	if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
  		wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)",
  			   (unsigned long) len);
  		return;
  	}
  
  	wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
  		   MAC2STR(mgmt->sa),
  		   le_to_host16(mgmt->u.disassoc.reason_code));
  
  	sta = ap_get_sta(hapd, mgmt->sa);
  	if (sta == NULL) {
  		wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated",
  			   MAC2STR(mgmt->sa));
  		return;
  	}
  
  	ap_sta_set_authorized(hapd, sta, 0);
  	sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
  	sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
  	wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
  	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  		       HOSTAPD_LEVEL_INFO, "disassociated");
  	sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
  	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
  	/* Stop Accounting and IEEE 802.1X sessions, but leave the STA
  	 * authenticated. */
  	accounting_sta_stop(hapd, sta);
  	ieee802_1x_free_station(hapd, sta);
  	if (sta->ipaddr)
  		hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr);
  	ap_sta_ip6addr_del(hapd, sta);
  	hostapd_drv_sta_remove(hapd, sta->addr);
  	sta->added_unassoc = 0;
  
  	if (sta->timeout_next == STA_NULLFUNC ||
  	    sta->timeout_next == STA_DISASSOC) {
  		sta->timeout_next = STA_DEAUTH;
  		eloop_cancel_timeout(ap_handle_timer, hapd, sta);
  		eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
  				       hapd, sta);
  	}
  
  	mlme_disassociate_indication(
  		hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
  
  	/* DMG/IEEE 802.11ad does not use deauthication. Deallocate sta upon
  	 * disassociation. */
  	if (hapd->iface->current_mode &&
  	    hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD) {
  		sta->flags &= ~WLAN_STA_AUTH;
  		wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG, "deauthenticated");
  		ap_free_sta(hapd, sta);
  	}
  }
  
  
  static void handle_deauth(struct hostapd_data *hapd,
  			  const struct ieee80211_mgmt *mgmt, size_t len)
  {
  	struct sta_info *sta;
  
  	if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
  		wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short "
  			"payload (len=%lu)", (unsigned long) len);
  		return;
  	}
  
  	wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR
  		" reason_code=%d",
  		MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code));
  
  	sta = ap_get_sta(hapd, mgmt->sa);
  	if (sta == NULL) {
  		wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying "
  			"to deauthenticate, but it is not authenticated",
  			MAC2STR(mgmt->sa));
  		return;
  	}
  
  	ap_sta_set_authorized(hapd, sta, 0);
  	sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
  	sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
  			WLAN_STA_ASSOC_REQ_OK);
  	wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
  	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  		       HOSTAPD_LEVEL_DEBUG, "deauthenticated");
  	mlme_deauthenticate_indication(
  		hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
  	sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
  	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
  	ap_free_sta(hapd, sta);
  }
  
  
  static void handle_beacon(struct hostapd_data *hapd,
  			  const struct ieee80211_mgmt *mgmt, size_t len,
  			  struct hostapd_frame_info *fi)
  {
  	struct ieee802_11_elems elems;
  
  	if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
  		wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)",
  			   (unsigned long) len);
  		return;
  	}
  
  	(void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
  				      len - (IEEE80211_HDRLEN +
  					     sizeof(mgmt->u.beacon)), &elems,
  				      0);
  
  	ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
  }
  
  
  #ifdef CONFIG_IEEE80211W
  
  static int hostapd_sa_query_action(struct hostapd_data *hapd,
  				   const struct ieee80211_mgmt *mgmt,
  				   size_t len)
  {
  	const u8 *end;
  
  	end = mgmt->u.action.u.sa_query_resp.trans_id +
  		WLAN_SA_QUERY_TR_ID_LEN;
  	if (((u8 *) mgmt) + len < end) {
  		wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
  			   "frame (len=%lu)", (unsigned long) len);
  		return 0;
  	}
  
  	ieee802_11_sa_query_action(hapd, mgmt->sa,
  				   mgmt->u.action.u.sa_query_resp.action,
  				   mgmt->u.action.u.sa_query_resp.trans_id);
  	return 1;
  }
  
  
  static int robust_action_frame(u8 category)
  {
  	return category != WLAN_ACTION_PUBLIC &&
  		category != WLAN_ACTION_HT;
  }
  #endif /* CONFIG_IEEE80211W */
  
  
  static int handle_action(struct hostapd_data *hapd,
  			 const struct ieee80211_mgmt *mgmt, size_t len)
  {
  	struct sta_info *sta;
  	sta = ap_get_sta(hapd, mgmt->sa);
  
  	if (len < IEEE80211_HDRLEN + 1) {
  		hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "handle_action - too short payload (len=%lu)",
  			       (unsigned long) len);
  		return 0;
  	}
  
  	if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
  	    (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
  		wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action "
  			   "frame (category=%u) from unassociated STA " MACSTR,
  			   mgmt->u.action.category, MAC2STR(mgmt->sa));
  		return 0;
  	}
  
  #ifdef CONFIG_IEEE80211W
  	if (sta && (sta->flags & WLAN_STA_MFP) &&
  	    !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) &&
  	    robust_action_frame(mgmt->u.action.category)) {
  		hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "Dropped unprotected Robust Action frame from "
  			       "an MFP STA");
  		return 0;
  	}
  #endif /* CONFIG_IEEE80211W */
  
  	if (sta) {
  		u16 fc = le_to_host16(mgmt->frame_control);
  		u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
  
  		if ((fc & WLAN_FC_RETRY) &&
  		    sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
  		    sta->last_seq_ctrl == seq_ctrl &&
  		    sta->last_subtype == WLAN_FC_STYPE_ACTION) {
  			hostapd_logger(hapd, sta->addr,
  				       HOSTAPD_MODULE_IEEE80211,
  				       HOSTAPD_LEVEL_DEBUG,
  				       "Drop repeated action frame seq_ctrl=0x%x",
  				       seq_ctrl);
  			return 1;
  		}
  
  		sta->last_seq_ctrl = seq_ctrl;
  		sta->last_subtype = WLAN_FC_STYPE_ACTION;
  	}
  
  	switch (mgmt->u.action.category) {
  #ifdef CONFIG_IEEE80211R_AP
  	case WLAN_ACTION_FT:
  		if (!sta ||
  		    wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
  				     len - IEEE80211_HDRLEN))
  			break;
  		return 1;
  #endif /* CONFIG_IEEE80211R_AP */
  	case WLAN_ACTION_WMM:
  		hostapd_wmm_action(hapd, mgmt, len);
  		return 1;
  #ifdef CONFIG_IEEE80211W
  	case WLAN_ACTION_SA_QUERY:
  		return hostapd_sa_query_action(hapd, mgmt, len);
  #endif /* CONFIG_IEEE80211W */
  #ifdef CONFIG_WNM
  	case WLAN_ACTION_WNM:
  		ieee802_11_rx_wnm_action_ap(hapd, mgmt, len);
  		return 1;
  #endif /* CONFIG_WNM */
  #ifdef CONFIG_FST
  	case WLAN_ACTION_FST:
  		if (hapd->iface->fst)
  			fst_rx_action(hapd->iface->fst, mgmt, len);
  		else
  			wpa_printf(MSG_DEBUG,
  				   "FST: Ignore FST Action frame - no FST attached");
  		return 1;
  #endif /* CONFIG_FST */
  	case WLAN_ACTION_PUBLIC:
  	case WLAN_ACTION_PROTECTED_DUAL:
  #ifdef CONFIG_IEEE80211N
  		if (len >= IEEE80211_HDRLEN + 2 &&
  		    mgmt->u.action.u.public_action.action ==
  		    WLAN_PA_20_40_BSS_COEX) {
  			wpa_printf(MSG_DEBUG,
  				   "HT20/40 coex mgmt frame received from STA "
  				   MACSTR, MAC2STR(mgmt->sa));
  			hostapd_2040_coex_action(hapd, mgmt, len);
  			return 1;
  		}
  #endif /* CONFIG_IEEE80211N */
  		if (hapd->public_action_cb) {
  			hapd->public_action_cb(hapd->public_action_cb_ctx,
  					       (u8 *) mgmt, len,
  					       hapd->iface->freq);
  		}
  		if (hapd->public_action_cb2) {
  			hapd->public_action_cb2(hapd->public_action_cb2_ctx,
  						(u8 *) mgmt, len,
  						hapd->iface->freq);
  		}
  		if (hapd->public_action_cb || hapd->public_action_cb2)
  			return 1;
  		break;
  	case WLAN_ACTION_VENDOR_SPECIFIC:
  		if (hapd->vendor_action_cb) {
  			if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
  						   (u8 *) mgmt, len,
  						   hapd->iface->freq) == 0)
  				return 1;
  		}
  		break;
  	case WLAN_ACTION_RADIO_MEASUREMENT:
  		hostapd_handle_radio_measurement(hapd, (const u8 *) mgmt, len);
  		return 1;
  	}
  
  	hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
  		       HOSTAPD_LEVEL_DEBUG,
  		       "handle_action - unknown action category %d or invalid "
  		       "frame",
  		       mgmt->u.action.category);
  	if (!is_multicast_ether_addr(mgmt->da) &&
  	    !(mgmt->u.action.category & 0x80) &&
  	    !is_multicast_ether_addr(mgmt->sa)) {
  		struct ieee80211_mgmt *resp;
  
  		/*
  		 * IEEE 802.11-REVma/D9.0 - 7.3.1.11
  		 * Return the Action frame to the source without change
  		 * except that MSB of the Category set to 1.
  		 */
  		wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
  			   "frame back to sender");
  		resp = os_memdup(mgmt, len);
  		if (resp == NULL)
  			return 0;
  		os_memcpy(resp->da, resp->sa, ETH_ALEN);
  		os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
  		os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
  		resp->u.action.category |= 0x80;
  
  		if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) {
  			wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send "
  				   "Action frame");
  		}
  		os_free(resp);
  	}
  
  	return 1;
  }
  
  
  /**
   * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
   * @hapd: hostapd BSS data structure (the BSS to which the management frame was
   * sent to)
   * @buf: management frame data (starting from IEEE 802.11 header)
   * @len: length of frame data in octets
   * @fi: meta data about received frame (signal level, etc.)
   *
   * Process all incoming IEEE 802.11 management frames. This will be called for
   * each frame received from the kernel driver through wlan#ap interface. In
   * addition, it can be called to re-inserted pending frames (e.g., when using
   * external RADIUS server as an MAC ACL).
   */
  int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
  		    struct hostapd_frame_info *fi)
  {
  	struct ieee80211_mgmt *mgmt;
  	u16 fc, stype;
  	int ret = 0;
  
  	if (len < 24)
  		return 0;
  
  	mgmt = (struct ieee80211_mgmt *) buf;
  	fc = le_to_host16(mgmt->frame_control);
  	stype = WLAN_FC_GET_STYPE(fc);
  
  	if (stype == WLAN_FC_STYPE_BEACON) {
  		handle_beacon(hapd, mgmt, len, fi);
  		return 1;
  	}
  
  	if (!is_broadcast_ether_addr(mgmt->bssid) &&
  #ifdef CONFIG_P2P
  	    /* Invitation responses can be sent with the peer MAC as BSSID */
  	    !((hapd->conf->p2p & P2P_GROUP_OWNER) &&
  	      stype == WLAN_FC_STYPE_ACTION) &&
  #endif /* CONFIG_P2P */
  #ifdef CONFIG_MESH
  	    !(hapd->conf->mesh & MESH_ENABLED) &&
  #endif /* CONFIG_MESH */
  	    os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
  		wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address",
  			   MAC2STR(mgmt->bssid));
  		return 0;
  	}
  
  
  	if (stype == WLAN_FC_STYPE_PROBE_REQ) {
  		handle_probe_req(hapd, mgmt, len, fi->ssi_signal);
  		return 1;
  	}
  
  	if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
  		hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "MGMT: DA=" MACSTR " not our address",
  			       MAC2STR(mgmt->da));
  		return 0;
  	}
  
  	if (hapd->iconf->track_sta_max_num)
  		sta_track_add(hapd->iface, mgmt->sa, fi->ssi_signal);
  
  	switch (stype) {
  	case WLAN_FC_STYPE_AUTH:
  		wpa_printf(MSG_DEBUG, "mgmt::auth");
  		handle_auth(hapd, mgmt, len);
  		ret = 1;
  		break;
  	case WLAN_FC_STYPE_ASSOC_REQ:
  		wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
  		handle_assoc(hapd, mgmt, len, 0);
  		ret = 1;
  		break;
  	case WLAN_FC_STYPE_REASSOC_REQ:
  		wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
  		handle_assoc(hapd, mgmt, len, 1);
  		ret = 1;
  		break;
  	case WLAN_FC_STYPE_DISASSOC:
  		wpa_printf(MSG_DEBUG, "mgmt::disassoc");
  		handle_disassoc(hapd, mgmt, len);
  		ret = 1;
  		break;
  	case WLAN_FC_STYPE_DEAUTH:
  		wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth");
  		handle_deauth(hapd, mgmt, len);
  		ret = 1;
  		break;
  	case WLAN_FC_STYPE_ACTION:
  		wpa_printf(MSG_DEBUG, "mgmt::action");
  		ret = handle_action(hapd, mgmt, len);
  		break;
  	default:
  		hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "unknown mgmt frame subtype %d", stype);
  		break;
  	}
  
  	return ret;
  }
  
  
  static void handle_auth_cb(struct hostapd_data *hapd,
  			   const struct ieee80211_mgmt *mgmt,
  			   size_t len, int ok)
  {
  	u16 auth_alg, auth_transaction, status_code;
  	struct sta_info *sta;
  
  	sta = ap_get_sta(hapd, mgmt->da);
  	if (!sta) {
  		wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found",
  			   MAC2STR(mgmt->da));
  		return;
  	}
  
  	auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
  	auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
  	status_code = le_to_host16(mgmt->u.auth.status_code);
  
  	if (!ok) {
  		hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_NOTICE,
  			       "did not acknowledge authentication response");
  		goto fail;
  	}
  
  	if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
  		wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
  			   (unsigned long) len);
  		goto fail;
  	}
  
  	if (status_code == WLAN_STATUS_SUCCESS &&
  	    ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
  	     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
  		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_INFO, "authenticated");
  		sta->flags |= WLAN_STA_AUTH;
  		if (sta->added_unassoc)
  			hostapd_set_sta_flags(hapd, sta);
  		return;
  	}
  
  fail:
  	if (status_code != WLAN_STATUS_SUCCESS && sta->added_unassoc) {
  		hostapd_drv_sta_remove(hapd, sta->addr);
  		sta->added_unassoc = 0;
  	}
  }
  
  
  static void hostapd_set_wds_encryption(struct hostapd_data *hapd,
  				       struct sta_info *sta,
  				       char *ifname_wds)
  {
  	int i;
  	struct hostapd_ssid *ssid = &hapd->conf->ssid;
  
  	if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  		return;
  
  	for (i = 0; i < 4; i++) {
  		if (ssid->wep.key[i] &&
  		    hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i,
  					i == ssid->wep.idx, NULL, 0,
  					ssid->wep.key[i], ssid->wep.len[i])) {
  			wpa_printf(MSG_WARNING,
  				   "Could not set WEP keys for WDS interface; %s",
  				   ifname_wds);
  			break;
  		}
  	}
  }
  
  
  static void handle_assoc_cb(struct hostapd_data *hapd,
  			    const struct ieee80211_mgmt *mgmt,
  			    size_t len, int reassoc, int ok)
  {
  	u16 status;
  	struct sta_info *sta;
  	int new_assoc = 1;
  
  	sta = ap_get_sta(hapd, mgmt->da);
  	if (!sta) {
  		wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found",
  			   MAC2STR(mgmt->da));
  		return;
  	}
  
  	if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
  				      sizeof(mgmt->u.assoc_resp))) {
  		wpa_printf(MSG_INFO,
  			   "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)",
  			   reassoc, (unsigned long) len);
  		hostapd_drv_sta_remove(hapd, sta->addr);
  		return;
  	}
  
  	if (reassoc)
  		status = le_to_host16(mgmt->u.reassoc_resp.status_code);
  	else
  		status = le_to_host16(mgmt->u.assoc_resp.status_code);
  
  	if (!ok) {
  		hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
  			       HOSTAPD_LEVEL_DEBUG,
  			       "did not acknowledge association response");
  		sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
  		/* The STA is added only in case of SUCCESS */
  		if (status == WLAN_STATUS_SUCCESS)
  			hostapd_drv_sta_remove(hapd, sta->addr);
  
  		return;
  	}
  
  	if (status != WLAN_STATUS_SUCCESS)
  		return;
  
  	/* Stop previous accounting session, if one is started, and allocate
  	 * new session id for the new session. */
  	accounting_sta_stop(hapd, sta);
  
  	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
  		       HOSTAPD_LEVEL_INFO,
  		       "associated (aid %d)",
  		       sta->aid);
  
  	if (sta->flags & WLAN_STA_ASSOC)
  		new_assoc = 0;
  	sta->flags |= WLAN_STA_ASSOC;
  	sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
  	if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
  	     !hapd->conf->osen) ||
  	    sta->auth_alg == WLAN_AUTH_FILS_SK ||
  	    sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
  	    sta->auth_alg == WLAN_AUTH_FILS_PK ||
  	    sta->auth_alg == WLAN_AUTH_FT) {
  		/*
  		 * Open, static WEP, FT protocol, or FILS; no separate
  		 * authorization step.
  		 */
  		ap_sta_set_authorized(hapd, sta, 1);
  	}
  
  	if (reassoc)
  		mlme_reassociate_indication(hapd, sta);
  	else
  		mlme_associate_indication(hapd, sta);
  
  #ifdef CONFIG_IEEE80211W
  	sta->sa_query_timed_out = 0;
  #endif /* CONFIG_IEEE80211W */
  
  	if (sta->eapol_sm == NULL) {
  		/*
  		 * This STA does not use RADIUS server for EAP authentication,
  		 * so bind it to the selected VLAN interface now, since the
  		 * interface selection is not going to change anymore.
  		 */
  		if (ap_sta_bind_vlan(hapd, sta) < 0)
  			return;
  	} else if (sta->vlan_id) {
  		/* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
  		if (ap_sta_bind_vlan(hapd, sta) < 0)
  			return;
  	}
  
  	hostapd_set_sta_flags(hapd, sta);
  
  	if (!(sta->flags & WLAN_STA_WDS) && sta->pending_wds_enable) {
  		wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for STA "
  			   MACSTR " based on pending request",
  			   MAC2STR(sta->addr));
  		sta->pending_wds_enable = 0;
  		sta->flags |= WLAN_STA_WDS;
  	}
  
  	if (sta->flags & WLAN_STA_WDS) {
  		int ret;
  		char ifname_wds[IFNAMSIZ + 1];
  
  		wpa_printf(MSG_DEBUG, "Reenable 4-address WDS mode for STA "
  			   MACSTR " (aid %u)",
  			   MAC2STR(sta->addr), sta->aid);
  		ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr,
  					  sta->aid, 1);
  		if (!ret)
  			hostapd_set_wds_encryption(hapd, sta, ifname_wds);
  	}
  
  	if (sta->auth_alg == WLAN_AUTH_FT)
  		wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
  	else
  		wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
  	hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
  	ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
  
  #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) &&
  	    fils_set_tk(sta->wpa_sm) < 0) {
  		wpa_printf(MSG_DEBUG, "FILS: TK configuration failed");
  		ap_sta_disconnect(hapd, sta, sta->addr,
  				  WLAN_REASON_UNSPECIFIED);
  		return;
  	}
  #endif /* CONFIG_FILS */
  
  	if (sta->pending_eapol_rx) {
  		struct os_reltime now, age;
  
  		os_get_reltime(&now);
  		os_reltime_sub(&now, &sta->pending_eapol_rx->rx_time, &age);
  		if (age.sec == 0 && age.usec < 200000) {
  			wpa_printf(MSG_DEBUG,
  				   "Process pending EAPOL frame that was received from " MACSTR " just before association notification",
  				   MAC2STR(sta->addr));
  			ieee802_1x_receive(
  				hapd, mgmt->da,
  				wpabuf_head(sta->pending_eapol_rx->buf),
  				wpabuf_len(sta->pending_eapol_rx->buf));
  		}
  		wpabuf_free(sta->pending_eapol_rx->buf);
  		os_free(sta->pending_eapol_rx);
  		sta->pending_eapol_rx = NULL;
  	}
  }
  
  
  static void handle_deauth_cb(struct hostapd_data *hapd,
  			     const struct ieee80211_mgmt *mgmt,
  			     size_t len, int ok)
  {
  	struct sta_info *sta;
  	if (is_multicast_ether_addr(mgmt->da))
  		return;
  	sta = ap_get_sta(hapd, mgmt->da);
  	if (!sta) {
  		wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR
  			   " not found", MAC2STR(mgmt->da));
  		return;
  	}
  	if (ok)
  		wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth",
  			   MAC2STR(sta->addr));
  	else
  		wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
  			   "deauth", MAC2STR(sta->addr));
  
  	ap_sta_deauth_cb(hapd, sta);
  }
  
  
  static void handle_disassoc_cb(struct hostapd_data *hapd,
  			       const struct ieee80211_mgmt *mgmt,
  			       size_t len, int ok)
  {
  	struct sta_info *sta;
  	if (is_multicast_ether_addr(mgmt->da))
  		return;
  	sta = ap_get_sta(hapd, mgmt->da);
  	if (!sta) {
  		wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR
  			   " not found", MAC2STR(mgmt->da));
  		return;
  	}
  	if (ok)
  		wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc",
  			   MAC2STR(sta->addr));
  	else
  		wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
  			   "disassoc", MAC2STR(sta->addr));
  
  	ap_sta_disassoc_cb(hapd, sta);
  }
  
  
  static void handle_action_cb(struct hostapd_data *hapd,
  			     const struct ieee80211_mgmt *mgmt,
  			     size_t len, int ok)
  {
  	struct sta_info *sta;
  	const struct rrm_measurement_report_element *report;
  
  	if (is_multicast_ether_addr(mgmt->da))
  		return;
  	sta = ap_get_sta(hapd, mgmt->da);
  	if (!sta) {
  		wpa_printf(MSG_DEBUG, "handle_action_cb: STA " MACSTR
  			   " not found", MAC2STR(mgmt->da));
  		return;
  	}
  
  	if (len < 24 + 5 + sizeof(*report))
  		return;
  	report = (const struct rrm_measurement_report_element *)
  		&mgmt->u.action.u.rrm.variable[2];
  	if (mgmt->u.action.category == WLAN_ACTION_RADIO_MEASUREMENT &&
  	    mgmt->u.action.u.rrm.action == WLAN_RRM_RADIO_MEASUREMENT_REQUEST &&
  	    report->eid == WLAN_EID_MEASURE_REQUEST &&
  	    report->len >= 3 &&
  	    report->type == MEASURE_TYPE_BEACON)
  		hostapd_rrm_beacon_req_tx_status(hapd, mgmt, len, ok);
  }
  
  
  /**
   * ieee802_11_mgmt_cb - Process management frame TX status callback
   * @hapd: hostapd BSS data structure (the BSS from which the management frame
   * was sent from)
   * @buf: management frame data (starting from IEEE 802.11 header)
   * @len: length of frame data in octets
   * @stype: management frame subtype from frame control field
   * @ok: Whether the frame was ACK'ed
   */
  void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
  			u16 stype, int ok)
  {
  	const struct ieee80211_mgmt *mgmt;
  	mgmt = (const struct ieee80211_mgmt *) buf;
  
  #ifdef CONFIG_TESTING_OPTIONS
  	if (hapd->ext_mgmt_frame_handling) {
  		wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d",
  			stype, ok);
  		return;
  	}
  #endif /* CONFIG_TESTING_OPTIONS */
  
  	switch (stype) {
  	case WLAN_FC_STYPE_AUTH:
  		wpa_printf(MSG_DEBUG, "mgmt::auth cb");
  		handle_auth_cb(hapd, mgmt, len, ok);
  		break;
  	case WLAN_FC_STYPE_ASSOC_RESP:
  		wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
  		handle_assoc_cb(hapd, mgmt, len, 0, ok);
  		break;
  	case WLAN_FC_STYPE_REASSOC_RESP:
  		wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
  		handle_assoc_cb(hapd, mgmt, len, 1, ok);
  		break;
  	case WLAN_FC_STYPE_PROBE_RESP:
  		wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb ok=%d", ok);
  		break;
  	case WLAN_FC_STYPE_DEAUTH:
  		wpa_printf(MSG_DEBUG, "mgmt::deauth cb");
  		handle_deauth_cb(hapd, mgmt, len, ok);
  		break;
  	case WLAN_FC_STYPE_DISASSOC:
  		wpa_printf(MSG_DEBUG, "mgmt::disassoc cb");
  		handle_disassoc_cb(hapd, mgmt, len, ok);
  		break;
  	case WLAN_FC_STYPE_ACTION:
  		wpa_printf(MSG_DEBUG, "mgmt::action cb ok=%d", ok);
  		handle_action_cb(hapd, mgmt, len, ok);
  		break;
  	default:
  		wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype);
  		break;
  	}
  }
  
  
  int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
  {
  	/* TODO */
  	return 0;
  }
  
  
  int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
  			   char *buf, size_t buflen)
  {
  	/* TODO */
  	return 0;
  }
  
  
  void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
  		       const u8 *buf, size_t len, int ack)
  {
  	struct sta_info *sta;
  	struct hostapd_iface *iface = hapd->iface;
  
  	sta = ap_get_sta(hapd, addr);
  	if (sta == NULL && iface->num_bss > 1) {
  		size_t j;
  		for (j = 0; j < iface->num_bss; j++) {
  			hapd = iface->bss[j];
  			sta = ap_get_sta(hapd, addr);
  			if (sta)
  				break;
  		}
  	}
  	if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))
  		return;
  	if (sta->flags & WLAN_STA_PENDING_POLL) {
  		wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
  			   "activity poll", MAC2STR(sta->addr),
  			   ack ? "ACKed" : "did not ACK");
  		if (ack)
  			sta->flags &= ~WLAN_STA_PENDING_POLL;
  	}
  
  	ieee802_1x_tx_status(hapd, sta, buf, len, ack);
  }
  
  
  void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
  			     const u8 *data, size_t len, int ack)
  {
  	struct sta_info *sta;
  	struct hostapd_iface *iface = hapd->iface;
  
  	sta = ap_get_sta(hapd, dst);
  	if (sta == NULL && iface->num_bss > 1) {
  		size_t j;
  		for (j = 0; j < iface->num_bss; j++) {
  			hapd = iface->bss[j];
  			sta = ap_get_sta(hapd, dst);
  			if (sta)
  				break;
  		}
  	}
  	if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
  		wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA "
  			   MACSTR " that is not currently associated",
  			   MAC2STR(dst));
  		return;
  	}
  
  	ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack);
  }
  
  
  void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr)
  {
  	struct sta_info *sta;
  	struct hostapd_iface *iface = hapd->iface;
  
  	sta = ap_get_sta(hapd, addr);
  	if (sta == NULL && iface->num_bss > 1) {
  		size_t j;
  		for (j = 0; j < iface->num_bss; j++) {
  			hapd = iface->bss[j];
  			sta = ap_get_sta(hapd, addr);
  			if (sta)
  				break;
  		}
  	}
  	if (sta == NULL)
  		return;
  	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_POLL_OK MACSTR,
  		MAC2STR(sta->addr));
  	if (!(sta->flags & WLAN_STA_PENDING_POLL))
  		return;
  
  	wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending "
  		   "activity poll", MAC2STR(sta->addr));
  	sta->flags &= ~WLAN_STA_PENDING_POLL;
  }
  
  
  void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
  				int wds)
  {
  	struct sta_info *sta;
  
  	sta = ap_get_sta(hapd, src);
  	if (sta &&
  	    ((sta->flags & WLAN_STA_ASSOC) ||
  	     ((sta->flags & WLAN_STA_ASSOC_REQ_OK) && wds))) {
  		if (!hapd->conf->wds_sta)
  			return;
  
  		if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK)) ==
  		    WLAN_STA_ASSOC_REQ_OK) {
  			wpa_printf(MSG_DEBUG,
  				   "Postpone 4-address WDS mode enabling for STA "
  				   MACSTR " since TX status for AssocResp is not yet known",
  				   MAC2STR(sta->addr));
  			sta->pending_wds_enable = 1;
  			return;
  		}
  
  		if (wds && !(sta->flags & WLAN_STA_WDS)) {
  			int ret;
  			char ifname_wds[IFNAMSIZ + 1];
  
  			wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
  				   "STA " MACSTR " (aid %u)",
  				   MAC2STR(sta->addr), sta->aid);
  			sta->flags |= WLAN_STA_WDS;
  			ret = hostapd_set_wds_sta(hapd, ifname_wds,
  						  sta->addr, sta->aid, 1);
  			if (!ret)
  				hostapd_set_wds_encryption(hapd, sta,
  							   ifname_wds);
  		}
  		return;
  	}
  
  	wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
  		   MACSTR, MAC2STR(src));
  	if (is_multicast_ether_addr(src)) {
  		/* Broadcast bit set in SA?! Ignore the frame silently. */
  		return;
  	}
  
  	if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
  		wpa_printf(MSG_DEBUG, "Association Response to the STA has "
  			   "already been sent, but no TX status yet known - "
  			   "ignore Class 3 frame issue with " MACSTR,
  			   MAC2STR(src));
  		return;
  	}
  
  	if (sta && (sta->flags & WLAN_STA_AUTH))
  		hostapd_drv_sta_disassoc(
  			hapd, src,
  			WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
  	else
  		hostapd_drv_sta_deauth(
  			hapd, src,
  			WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
  }
  
  
  #endif /* CONFIG_NATIVE_WINDOWS */
  