示例#1
0
文件: ieee802_11.c 项目: OPSF/uClinux
static void handle_auth(hostapd *hapd, 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;
	u16 fc;
	u8 *challenge = NULL;
	u32 session_timeout, acct_interim_interval;

	if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
		printf("handle_auth - too short payload (len=%d)\n", len);
		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);
	fc = le_to_host16(mgmt->frame_control);

	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];

	HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
		      "authentication: STA=" MACSTR " auth_alg=%d "
		      "auth_transaction=%d status_code=%d wep=%d%s\n",
		      MAC2STR(mgmt->sa), auth_alg, auth_transaction,
		      status_code, !!(fc & WLAN_FC_ISWEP),
		      challenge ? " challenge" : "");

	if (hapd->assoc_ap_state == AUTHENTICATE && auth_transaction == 2 &&
	    memcmp(mgmt->sa, hapd->conf->assoc_ap_addr, ETH_ALEN) == 0 &&
	    memcmp(mgmt->bssid, hapd->conf->assoc_ap_addr, ETH_ALEN) == 0) {
		if (status_code != 0) {
			printf("Authentication (as station) with AP "
			       MACSTR " failed (status_code=%d)\n",
			       MAC2STR(hapd->conf->assoc_ap_addr),
			       status_code);
			return;
		}
		printf("Authenticated (as station) with AP " MACSTR "\n",
		       MAC2STR(hapd->conf->assoc_ap_addr));
		ieee802_11_sta_associate(hapd, NULL);
		return;
	}

	if (hapd->tkip_countermeasures) {
		resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
		goto fail;
	}

	if (!(((hapd->conf->auth_algs & HOSTAPD_AUTH_OPEN) &&
	       auth_alg == WLAN_AUTH_OPEN) ||
	      ((hapd->conf->auth_algs & HOSTAPD_AUTH_SHARED_KEY) &&
	       auth_alg == WLAN_AUTH_SHARED_KEY))) {
		printf("Unsupported authentication algorithm (%d)\n",
		       auth_alg);
		resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
		goto fail;
	}

	if (!(auth_transaction == 1 ||
	      (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
		printf("Unknown authentication transaction number (%d)\n",
		       auth_transaction);
		resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
		goto fail;
	}

	if (memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
		printf("Station " MACSTR " not allowed to authenticate.\n",
		       MAC2STR(mgmt->sa));
		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
		goto fail;
	}

	res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
				      &session_timeout,
				      &acct_interim_interval);
	if (res == HOSTAPD_ACL_REJECT) {
		printf("Station " MACSTR " not allowed to authenticate.\n",
		       MAC2STR(mgmt->sa));
		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
		goto fail;
	}
	if (res == HOSTAPD_ACL_PENDING) {
		HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "Authentication frame "
			      "from " MACSTR " waiting for an external "
			      "authentication\n", MAC2STR(mgmt->sa));
		/* Authentication code will re-send the authentication frame
		 * after it has received (and cached) information from the
		 * external source. */
		return;
	}

	sta = auth_get_sta(hapd, mgmt->sa);
	if (!sta) {
		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
		goto fail;
	}
	sta->flags &= ~WLAN_STA_PREAUTH;
	ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);

	if (hapd->conf->radius_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);

	switch (auth_alg) {
	case WLAN_AUTH_OPEN:
		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
			       HOSTAPD_LEVEL_DEBUG,
			       "authentication OK (open system)");
#ifdef IEEE80211_REQUIRE_AUTH_ACK
		/* Station will be marked authenticated if it ACKs the
		 * authentication reply. */
#else
		sta->flags |= WLAN_STA_AUTH;
		wpa_sm_event(hapd, sta, WPA_AUTH);
#endif
		break;
	case WLAN_AUTH_SHARED_KEY:
		resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
				       fc & WLAN_FC_ISWEP);
		break;
	}

 fail:
	send_auth_reply(hapd, mgmt, auth_alg, auth_transaction + 1, resp,
			sta ? sta->challenge : NULL);
}
示例#2
0
int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
			const u8 *req_ies, size_t req_ies_len, int reassoc)
{
	struct sta_info *sta;
	int new_assoc, res;
	struct ieee802_11_elems elems;
	const u8 *ie;
	size_t ielen;
#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
	u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
	u8 *p = buf;
#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
	u16 reason = WLAN_REASON_UNSPECIFIED;
	u16 status = WLAN_STATUS_SUCCESS;
	const u8 *p2p_dev_addr = NULL;

	if (addr == NULL) {
		/*
		 * This could potentially happen with unexpected event from the
		 * driver wrapper. This was seen at least in one case where the
		 * driver ended up being set to station mode while hostapd was
		 * running, so better make sure we stop processing such an
		 * event here.
		 */
		wpa_printf(MSG_DEBUG,
			   "hostapd_notif_assoc: Skip event with no address");
		return -1;
	}
	random_add_randomness(addr, ETH_ALEN);

	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_INFO, "associated");

	ieee802_11_parse_elems(req_ies, req_ies_len, &elems, 0);
	if (elems.wps_ie) {
		ie = elems.wps_ie - 2;
		ielen = elems.wps_ie_len + 2;
		wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq");
	} else if (elems.rsn_ie) {
		ie = elems.rsn_ie - 2;
		ielen = elems.rsn_ie_len + 2;
		wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq");
	} else if (elems.wpa_ie) {
		ie = elems.wpa_ie - 2;
		ielen = elems.wpa_ie_len + 2;
		wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq");
#ifdef CONFIG_HS20
	} else if (elems.osen) {
		ie = elems.osen - 2;
		ielen = elems.osen_len + 2;
		wpa_printf(MSG_DEBUG, "STA included OSEN IE in (Re)AssocReq");
#endif /* CONFIG_HS20 */
	} else {
		ie = NULL;
		ielen = 0;
		wpa_printf(MSG_DEBUG,
			   "STA did not include WPS/RSN/WPA IE in (Re)AssocReq");
	}

	sta = ap_get_sta(hapd, addr);
	if (sta) {
		ap_sta_no_session_timeout(hapd, sta);
		accounting_sta_stop(hapd, sta);

		/*
		 * Make sure that the previously registered inactivity timer
		 * will not remove the STA immediately.
		 */
		sta->timeout_next = STA_NULLFUNC;
	} else {
		sta = ap_sta_add(hapd, addr);
		if (sta == NULL) {
			hostapd_drv_sta_disassoc(hapd, addr,
						 WLAN_REASON_DISASSOC_AP_BUSY);
			return -1;
		}
	}
	sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);

	/*
	 * ACL configurations to the drivers (implementing AP SME and ACL
	 * offload) without hostapd's knowledge, can result in a disconnection
	 * though the driver accepts the connection. Skip the hostapd check for
	 * ACL if the driver supports ACL offload to avoid potentially
	 * conflicting ACL rules.
	 */
	if (hapd->iface->drv_max_acl_mac_addrs == 0 &&
	    hostapd_check_acl(hapd, addr, NULL) != HOSTAPD_ACL_ACCEPT) {
		wpa_printf(MSG_INFO, "STA " MACSTR " not allowed to connect",
			   MAC2STR(addr));
		reason = WLAN_REASON_UNSPECIFIED;
		goto fail;
	}

#ifdef CONFIG_P2P
	if (elems.p2p) {
		wpabuf_free(sta->p2p_ie);
		sta->p2p_ie = ieee802_11_vendor_ie_concat(req_ies, req_ies_len,
							  P2P_IE_VENDOR_TYPE);
		if (sta->p2p_ie)
			p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
	}
#endif /* CONFIG_P2P */

#ifdef CONFIG_IEEE80211N
#ifdef NEED_AP_MLME
	if (elems.ht_capabilities &&
	    (hapd->iface->conf->ht_capab &
	     HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) {
		struct ieee80211_ht_capabilities *ht_cap =
			(struct ieee80211_ht_capabilities *)
			elems.ht_capabilities;

		if (le_to_host16(ht_cap->ht_capabilities_info) &
		    HT_CAP_INFO_40MHZ_INTOLERANT)
			ht40_intolerant_add(hapd->iface, sta);
	}
#endif /* NEED_AP_MLME */
#endif /* CONFIG_IEEE80211N */

#ifdef CONFIG_INTERWORKING
	if (elems.ext_capab && elems.ext_capab_len > 4) {
		if (elems.ext_capab[4] & 0x01)
			sta->qos_map_enabled = 1;
	}
#endif /* CONFIG_INTERWORKING */

#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 */

	mbo_ap_check_sta_assoc(hapd, sta, &elems);

	ap_copy_sta_supp_op_classes(sta, elems.supp_op_classes,
				    elems.supp_op_classes_len);

	if (hapd->conf->wpa) {
		if (ie == NULL || ielen == 0) {
#ifdef CONFIG_WPS
			if (hapd->conf->wps_state) {
				wpa_printf(MSG_DEBUG,
					   "STA did not include WPA/RSN IE in (Re)Association Request - possible WPS use");
				sta->flags |= WLAN_STA_MAYBE_WPS;
				goto skip_wpa_check;
			}
#endif /* CONFIG_WPS */

			wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
			return -1;
		}
#ifdef CONFIG_WPS
		if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
		    os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
			struct wpabuf *wps;

			sta->flags |= WLAN_STA_WPS;
			wps = ieee802_11_vendor_ie_concat(ie, ielen,
							  WPS_IE_VENDOR_TYPE);
			if (wps) {
				if (wps_is_20(wps)) {
					wpa_printf(MSG_DEBUG,
						   "WPS: STA supports WPS 2.0");
					sta->flags |= WLAN_STA_WPS2;
				}
				wpabuf_free(wps);
			}
			goto skip_wpa_check;
		}
#endif /* CONFIG_WPS */

		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_ERROR,
				   "Failed to initialize WPA state machine");
			return -1;
		}
		res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
					  ie, ielen,
					  elems.mdie, elems.mdie_len);
		if (res != WPA_IE_OK) {
			wpa_printf(MSG_DEBUG,
				   "WPA/RSN information element rejected? (res %u)",
				   res);
			wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
			if (res == WPA_INVALID_GROUP) {
				reason = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
				status = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
			} else if (res == WPA_INVALID_PAIRWISE) {
				reason = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
				status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
			} else if (res == WPA_INVALID_AKMP) {
				reason = WLAN_REASON_AKMP_NOT_VALID;
				status = WLAN_STATUS_AKMP_NOT_VALID;
			}
#ifdef CONFIG_IEEE80211W
			else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) {
				reason = WLAN_REASON_INVALID_IE;
				status = WLAN_STATUS_INVALID_IE;
			} else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) {
				reason = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
				status = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
			}
#endif /* CONFIG_IEEE80211W */
			else {
				reason = WLAN_REASON_INVALID_IE;
				status = WLAN_STATUS_INVALID_IE;
			}
			goto fail;
		}
#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 &&
		    (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);

			status = WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;

			p = hostapd_eid_assoc_comeback_time(hapd, sta, p);

			hostapd_sta_assoc(hapd, addr, reassoc, status, buf,
					  p - buf);
			return 0;
		}

		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
		if (sta->auth_alg == WLAN_AUTH_FT) {
			status = wpa_ft_validate_reassoc(sta->wpa_sm, req_ies,
							 req_ies_len);
			if (status != WLAN_STATUS_SUCCESS) {
				if (status == WLAN_STATUS_INVALID_PMKID)
					reason = WLAN_REASON_INVALID_IE;
				if (status == WLAN_STATUS_INVALID_MDIE)
					reason = WLAN_REASON_INVALID_IE;
				if (status == WLAN_STATUS_INVALID_FTIE)
					reason = WLAN_REASON_INVALID_IE;
				goto fail;
			}
		}
#endif /* CONFIG_IEEE80211R */
	} else if (hapd->conf->wps_state) {
#ifdef CONFIG_WPS
		struct wpabuf *wps;

		if (req_ies)
			wps = ieee802_11_vendor_ie_concat(req_ies, req_ies_len,
							  WPS_IE_VENDOR_TYPE);
		else
			wps = NULL;
#ifdef CONFIG_WPS_STRICT
		if (wps && wps_validate_assoc_req(wps) < 0) {
			reason = WLAN_REASON_INVALID_IE;
			status = WLAN_STATUS_INVALID_IE;
			wpabuf_free(wps);
			goto fail;
		}
#endif /* CONFIG_WPS_STRICT */
		if (wps) {
			sta->flags |= WLAN_STA_WPS;
			if (wps_is_20(wps)) {
				wpa_printf(MSG_DEBUG,
					   "WPS: STA supports WPS 2.0");
				sta->flags |= WLAN_STA_WPS2;
			}
		} else
			sta->flags |= WLAN_STA_MAYBE_WPS;
		wpabuf_free(wps);
#endif /* CONFIG_WPS */
#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 */
	}

#ifdef CONFIG_MBO
	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 */

#ifdef CONFIG_WPS
skip_wpa_check:
#endif /* CONFIG_WPS */

#ifdef CONFIG_IEEE80211R
	p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, buf, sizeof(buf),
					sta->auth_alg, req_ies, req_ies_len);

	hostapd_sta_assoc(hapd, addr, reassoc, status, buf, p - buf);

	if (sta->auth_alg == WLAN_AUTH_FT)
		ap_sta_set_authorized(hapd, sta, 1);
#else /* CONFIG_IEEE80211R */
	/* Keep compiler silent about unused variables */
	if (status) {
	}
#endif /* CONFIG_IEEE80211R */

	new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
	sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
	sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;

	hostapd_set_sta_flags(hapd, sta);

	if (reassoc && (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);

	hostapd_new_assoc_sta(hapd, sta, !new_assoc);

	ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);

#ifdef CONFIG_P2P
	if (req_ies) {
		p2p_group_notif_assoc(hapd->p2p_group, sta->addr,
				      req_ies, req_ies_len);
	}
#endif /* CONFIG_P2P */

	return 0;

fail:
#ifdef CONFIG_IEEE80211R
	hostapd_sta_assoc(hapd, addr, reassoc, status, buf, p - buf);
#endif /* CONFIG_IEEE80211R */
	hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
	ap_free_sta(hapd, sta);
	return -1;
}
示例#3
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;
	u16 fc;
	const u8 *challenge = NULL;
	u32 session_timeout, acct_interim_interval;
	int vlan_id = 0;
	u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
	size_t resp_ies_len = 0;

	if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
		printf("handle_auth - too short payload (len=%lu)\n",
		       (unsigned long) len);
		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);
	fc = le_to_host16(mgmt->frame_control);

	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",
		   MAC2STR(mgmt->sa), auth_alg, auth_transaction,
		   status_code, !!(fc & WLAN_FC_ISWEP),
		   challenge ? " challenge" : "");

	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
	      (hapd->conf->wpa &&
	       (hapd->conf->wpa_key_mgmt &
		(WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) &&
	       auth_alg == WLAN_AUTH_FT) ||
#endif /* CONFIG_IEEE80211R */
	      ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
	       auth_alg == WLAN_AUTH_SHARED_KEY))) {
		printf("Unsupported authentication algorithm (%d)\n",
		       auth_alg);
		resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
		goto fail;
	}

	if (!(auth_transaction == 1 ||
	      (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
		printf("Unknown authentication transaction number (%d)\n",
		       auth_transaction);
		resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
		goto fail;
	}

	if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
		printf("Station " MACSTR " not allowed to authenticate.\n",
		       MAC2STR(mgmt->sa));
		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
		goto fail;
	}

	res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
				      &session_timeout,
				      &acct_interim_interval, &vlan_id);
	if (res == HOSTAPD_ACL_REJECT) {
		printf("Station " MACSTR " not allowed to authenticate.\n",
		       MAC2STR(mgmt->sa));
		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
		goto fail;
	}
	if (res == HOSTAPD_ACL_PENDING) {
		wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
			   " waiting for an external authentication",
			   MAC2STR(mgmt->sa));
		/* Authentication code will re-send the authentication frame
		 * after it has received (and cached) information from the
		 * external source. */
		return;
	}

	sta = ap_sta_add(hapd, mgmt->sa);
	if (!sta) {
		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
		goto fail;
	}

	if (vlan_id > 0) {
		if (hostapd_get_vlan_id_ifname(hapd->conf->vlan,
					       vlan_id) == NULL) {
			hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
				       HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
				       "%d received from RADIUS server",
				       vlan_id);
			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
			goto fail;
		}
		sta->vlan_id = vlan_id;
		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
			       HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
	}

	sta->flags &= ~WLAN_STA_PREAUTH;
	ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);

	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);

	switch (auth_alg) {
	case WLAN_AUTH_OPEN:
		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
			       HOSTAPD_LEVEL_DEBUG,
			       "authentication OK (open system)");
#ifdef IEEE80211_REQUIRE_AUTH_ACK
		/* Station will be marked authenticated if it ACKs the
		 * authentication reply. */
#else
		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);
#endif
		break;
	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;
#ifdef CONFIG_IEEE80211R
	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);
		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 */
	}

 fail:
	send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
			auth_transaction + 1, resp, resp_ies, resp_ies_len);
}