Exemplo n.º 1
0
/* Process the RADIUS frames from Authentication Server */
static RadiusRxResult
ieee802_1x_receive_auth(struct wpa_supplicant *wpa_s,
			struct radius_msg *msg, struct radius_msg *req,
			u8 *shared_secret, size_t shared_secret_len,
			void *data)
{
	/* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
	 * present when packet contains an EAP-Message attribute */
	if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
	    radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
				0) < 0 &&
	    radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
		wpa_printf(MSG_DEBUG, "Allowing RADIUS "
			      "Access-Reject without Message-Authenticator "
			      "since it does not include EAP-Message\n");
	} else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
				     req)) {
		printf("Incoming RADIUS packet did not have correct "
		       "Message-Authenticator - dropped\n");
		return RADIUS_RX_UNKNOWN;
	}

	if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
	    msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
	    msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
		printf("Unknown RADIUS message code\n");
		return RADIUS_RX_UNKNOWN;
	}

	wpa_s->radius_identifier = -1;
	wpa_printf(MSG_DEBUG, "RADIUS packet matching with station");

	if (wpa_s->last_recv_radius) {
		radius_msg_free(wpa_s->last_recv_radius);
		free(wpa_s->last_recv_radius);
	}

	wpa_s->last_recv_radius = msg;

	switch (msg->hdr->code) {
	case RADIUS_CODE_ACCESS_ACCEPT:
		wpa_s->radius_access_accept_received = 1;
		ieee802_1x_get_keys(wpa_s, msg, req, shared_secret,
				    shared_secret_len);
		break;
	case RADIUS_CODE_ACCESS_REJECT:
		wpa_s->radius_access_reject_received = 1;
		break;
	}

	ieee802_1x_decapsulate_radius(wpa_s);

	if ((msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
	     eapol_test_num_reauths < 0) ||
	    msg->hdr->code == RADIUS_CODE_ACCESS_REJECT) {
		eloop_terminate();
	}

	return RADIUS_RX_QUEUED;
}
Exemplo n.º 2
0
static struct radius_session *
radius_server_get_new_session(struct radius_server_data *data,
			      struct radius_client *client,
			      struct radius_msg *msg)
{
	u8 *user;
	size_t user_len;
	const struct hostapd_eap_user *eap_user;
	int res;
	struct radius_session *sess;
	struct eap_config eap_conf;

	RADIUS_DEBUG("Creating a new session");

	user = VM_MALLOC(256);
	if (user == NULL) {
		return NULL;
	}
	res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
	if (res < 0 || res > 256) {
		RADIUS_DEBUG("Could not get User-Name");
		VM_FREE(user);
		return NULL;
	}
	user_len = res;
	RADIUS_DUMP_ASCII("User-Name", user, user_len);

	eap_user = hostapd_get_eap_user(data->hostapd_conf, user, user_len, 0);
	VM_FREE(user);

	if (eap_user) {
		RADIUS_DEBUG("Matching user entry found");
		sess = radius_server_new_session(data, client);
		if (sess == NULL) {
			RADIUS_DEBUG("Failed to create a new session");
			return NULL;
		}
	} else {
		RADIUS_DEBUG("User-Name not found from user database");
		return NULL;
	}

	memset(&eap_conf, 0, sizeof(eap_conf));
	eap_conf.ssl_ctx = data->ssl_ctx;
	eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
	eap_conf.backend_auth = TRUE;
	sess->eap = eap_sm_init(sess, &radius_server_eapol_cb, &eap_conf);
	if (sess->eap == NULL) {
		RADIUS_DEBUG("Failed to initialize EAP state machine for the "
			     "new session");
		radius_server_session_free(data, sess);
		return NULL;
	}
	sess->eapRestart = TRUE;
	sess->portEnabled = TRUE;

	RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);

	return sess;
}
Exemplo n.º 3
0
/* Process the RADIUS frames from Authentication Server */
static RadiusRxResult
ieee802_1x_receive_auth(struct wpa_supplicant *wpa_s,
			struct radius_msg *msg, struct radius_msg *req,
			u8 *shared_secret, size_t shared_secret_len,
			void *data)
{
#if 0
	u32 session_timeout, termination_action;
	int session_timeout_set;
	int acct_interim_interval;
#endif

#if 0
	sta = ap_get_sta_radius_identifier(hapd, msg->hdr->identifier);
	if (sta == NULL) {
		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not "
		      "find matching station for this RADIUS "
		      "message\n");
		return RADIUS_RX_UNKNOWN;
	}
#endif

	/* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
	 * present when packet contains an EAP-Message attribute */
	if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
	    radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
				0) < 0 &&
	    radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
		wpa_printf(MSG_DEBUG, "Allowing RADIUS "
			      "Access-Reject without Message-Authenticator "
			      "since it does not include EAP-Message\n");
	} else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
				     req)) {
		printf("Incoming RADIUS packet did not have correct "
		       "Message-Authenticator - dropped\n");
		return RADIUS_RX_UNKNOWN;
	}

	if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
	    msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
	    msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
		printf("Unknown RADIUS message code\n");
		return RADIUS_RX_UNKNOWN;
	}

	wpa_s->radius_identifier = -1;
	wpa_printf(MSG_DEBUG, "RADIUS packet matching with station");

	if (wpa_s->last_recv_radius) {
		radius_msg_free(wpa_s->last_recv_radius);
		free(wpa_s->last_recv_radius);
	}

	wpa_s->last_recv_radius = msg;

#if 0
	session_timeout_set =
		!radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
					   &session_timeout);
	if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
				      &termination_action))
		termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;

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


	switch (msg->hdr->code) {
	case RADIUS_CODE_ACCESS_ACCEPT:
		/* draft-congdon-radius-8021x-22.txt, Ch. 3.17 */
		if (session_timeout_set &&
			termination_action ==
		    RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
			sta->eapol_sm->reauth_timer.reAuthPeriod =
				session_timeout;
		} else if (session_timeout_set)
			ap_sta_session_timeout(hapd, sta, session_timeout);

		sta->eapol_sm->be_auth.aSuccess = TRUE;
		ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
				    shared_secret_len);
		if (sta->eapol_sm->keyAvailable) {
			pmksa_cache_add(hapd, sta, sta->eapol_key_crypt,
					session_timeout_set ?
					session_timeout : -1);
		}
		break;
	case RADIUS_CODE_ACCESS_REJECT:
		sta->eapol_sm->be_auth.aFail = TRUE;
		break;
	case RADIUS_CODE_ACCESS_CHALLENGE:
		if (session_timeout_set) {
			/* RFC 2869, Ch. 2.3.2
			 * draft-congdon-radius-8021x-22.txt, Ch. 3.17 */
			sta->eapol_sm->be_auth.suppTimeout = session_timeout;
		}
		sta->eapol_sm->be_auth.aReq = TRUE;
		break;
	}
#else

	switch (msg->hdr->code) {
	case RADIUS_CODE_ACCESS_ACCEPT:
		wpa_s->radius_access_accept_received = 1;
		ieee802_1x_get_keys(wpa_s, msg, req, shared_secret,
				    shared_secret_len);
		break;
	case RADIUS_CODE_ACCESS_REJECT:
		wpa_s->radius_access_reject_received = 1;
		break;
	}
#endif

	ieee802_1x_decapsulate_radius(wpa_s);

	/* eapol_sm_step(sta->eapol_sm); */

	if (msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT ||
	    msg->hdr->code == RADIUS_CODE_ACCESS_REJECT) {
		eloop_terminate();
	}

	return RADIUS_RX_QUEUED;
}
Exemplo n.º 4
0
static int radius_server_request(struct radius_server_data *data,
				 struct radius_msg *msg,
				 struct sockaddr *from, socklen_t fromlen,
				 struct radius_client *client,
				 const char *from_addr, int from_port,
				 struct radius_session *force_sess)
{
	u8 *eap = NULL;
	size_t eap_len;
	int res, state_included = 0;
	u8 statebuf[4];
	unsigned int state;
	struct radius_session *sess;
	struct radius_msg *reply;
	int is_complete = 0;

	if (force_sess)
		sess = force_sess;
	else {
		res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
					  sizeof(statebuf));
		state_included = res >= 0;
		if (res == sizeof(statebuf)) {
			state = WPA_GET_BE32(statebuf);
			sess = radius_server_get_session(client, state);
		} else {
			sess = NULL;
		}
	}

	if (sess) {
		RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
	} else if (state_included) {
		RADIUS_DEBUG("State attribute included but no session found");
		radius_server_reject(data, client, msg, from, fromlen,
				     from_addr, from_port);
		return -1;
	} else {
		sess = radius_server_get_new_session(data, client, msg);
		if (sess == NULL) {
			RADIUS_DEBUG("Could not create a new session");
			radius_server_reject(data, client, msg, from, fromlen,
					     from_addr, from_port);
			return -1;
		}
	}

	if (sess->last_from_port == from_port &&
	    sess->last_identifier == msg->hdr->identifier &&
	    os_memcmp(sess->last_authenticator, msg->hdr->authenticator, 16) ==
	    0) {
		RADIUS_DEBUG("Duplicate message from %s", from_addr);
		data->counters.dup_access_requests++;
		client->counters.dup_access_requests++;

		if (sess->last_reply) {
			res = sendto(data->auth_sock, sess->last_reply->buf,
				     sess->last_reply->buf_used, 0,
				     (struct sockaddr *) from, fromlen);
			if (res < 0) {
				perror("sendto[RADIUS SRV]");
			}
			return 0;
		}

		RADIUS_DEBUG("No previous reply available for duplicate "
			     "message");
		return -1;
	}
		      
	eap = radius_msg_get_eap(msg, &eap_len);
	if (eap == NULL) {
		RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
			     from_addr);
		data->counters.packets_dropped++;
		client->counters.packets_dropped++;
		return -1;
	}

	RADIUS_DUMP("Received EAP data", eap, eap_len);

	/* FIX: if Code is Request, Success, or Failure, send Access-Reject;
	 * RFC3579 Sect. 2.6.2.
	 * Include EAP-Response/Nak with no preferred method if
	 * code == request.
	 * If code is not 1-4, discard the packet silently.
	 * Or is this already done by the EAP state machine? */

	wpabuf_free(sess->eap_if->eapRespData);
	sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len);
	if (sess->eap_if->eapRespData == NULL)
		os_free(eap);
	eap = NULL;
	sess->eap_if->eapResp = TRUE;
	eap_server_sm_step(sess->eap);

	if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
	     sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
		RADIUS_DUMP("EAP data from the state machine",
			    wpabuf_head(sess->eap_if->eapReqData),
			    wpabuf_len(sess->eap_if->eapReqData));
	} else if (sess->eap_if->eapFail) {
		RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
			     "set");
	} else if (eap_sm_method_pending(sess->eap)) {
		if (sess->last_msg) {
			radius_msg_free(sess->last_msg);
			os_free(sess->last_msg);
		}
		sess->last_msg = msg;
		sess->last_from_port = from_port;
		os_free(sess->last_from_addr);
		sess->last_from_addr = os_strdup(from_addr);
		sess->last_fromlen = fromlen;
		os_memcpy(&sess->last_from, from, fromlen);
		return -2;
	} else {
		RADIUS_DEBUG("No EAP data from the state machine - ignore this"
			     " Access-Request silently (assuming it was a "
			     "duplicate)");
		data->counters.packets_dropped++;
		client->counters.packets_dropped++;
		return -1;
	}

	if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
		is_complete = 1;

	reply = radius_server_encapsulate_eap(data, client, sess, msg);

	if (reply) {
		RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
		if (wpa_debug_level <= MSG_MSGDUMP) {
			radius_msg_dump(reply);
		}

		switch (reply->hdr->code) {
		case RADIUS_CODE_ACCESS_ACCEPT:
			data->counters.access_accepts++;
			client->counters.access_accepts++;
			break;
		case RADIUS_CODE_ACCESS_REJECT:
			data->counters.access_rejects++;
			client->counters.access_rejects++;
			break;
		case RADIUS_CODE_ACCESS_CHALLENGE:
			data->counters.access_challenges++;
			client->counters.access_challenges++;
			break;
		}
		res = sendto(data->auth_sock, reply->buf, reply->buf_used, 0,
			     (struct sockaddr *) from, fromlen);
		if (res < 0) {
			perror("sendto[RADIUS SRV]");
		}
		if (sess->last_reply) {
			radius_msg_free(sess->last_reply);
			os_free(sess->last_reply);
		}
		sess->last_reply = reply;
		sess->last_from_port = from_port;
		sess->last_identifier = msg->hdr->identifier;
		os_memcpy(sess->last_authenticator, msg->hdr->authenticator,
			  16);
	} else {
		data->counters.packets_dropped++;
		client->counters.packets_dropped++;
	}

	if (is_complete) {
		RADIUS_DEBUG("Removing completed session 0x%x after timeout",
			     sess->sess_id);
		eloop_cancel_timeout(radius_server_session_remove_timeout,
				     data, sess);
		eloop_register_timeout(10, 0,
				       radius_server_session_remove_timeout,
				       data, sess);
	}

	return 0;
}
Exemplo n.º 5
0
static struct radius_session *
radius_server_get_new_session(struct radius_server_data *data,
			      struct radius_client *client,
			      struct radius_msg *msg)
{
	u8 *user;
	size_t user_len;
	int res;
	struct radius_session *sess;
	struct eap_config eap_conf;

	RADIUS_DEBUG("Creating a new session");

	user = os_malloc(256);
	if (user == NULL) {
		return NULL;
	}
	res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
	if (res < 0 || res > 256) {
		RADIUS_DEBUG("Could not get User-Name");
		os_free(user);
		return NULL;
	}
	user_len = res;
	RADIUS_DUMP_ASCII("User-Name", user, user_len);

	res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
	os_free(user);

	if (res == 0) {
		RADIUS_DEBUG("Matching user entry found");
		sess = radius_server_new_session(data, client);
		if (sess == NULL) {
			RADIUS_DEBUG("Failed to create a new session");
			return NULL;
		}
	} else {
		RADIUS_DEBUG("User-Name not found from user database");
		return NULL;
	}

	os_memset(&eap_conf, 0, sizeof(eap_conf));
	eap_conf.ssl_ctx = data->ssl_ctx;
	eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
	eap_conf.backend_auth = TRUE;
	eap_conf.eap_server = 1;
	eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
	eap_conf.eap_fast_a_id = data->eap_fast_a_id;
	eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
	eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
	eap_conf.eap_fast_prov = data->eap_fast_prov;
	eap_conf.pac_key_lifetime = data->pac_key_lifetime;
	eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
	eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
	eap_conf.tnc = data->tnc;
	eap_conf.wps = data->wps;
	sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
				       &eap_conf);
	if (sess->eap == NULL) {
		RADIUS_DEBUG("Failed to initialize EAP state machine for the "
			     "new session");
		radius_server_session_free(data, sess);
		return NULL;
	}
	sess->eap_if = eap_get_interface(sess->eap);
	sess->eap_if->eapRestart = TRUE;
	sess->eap_if->portEnabled = TRUE;

	RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);

	return sess;
}
Exemplo n.º 6
0
static void radius_das_receive(int sock, void *eloop_ctx, void *sock_ctx)
{
	struct radius_das_data *das = eloop_ctx;
	u8 buf[1500];
	union {
		struct sockaddr_storage ss;
		struct sockaddr_in sin;
#ifdef CONFIG_IPV6
		struct sockaddr_in6 sin6;
#endif /* CONFIG_IPV6 */
	} from;
	char abuf[50];
	int from_port = 0;
	socklen_t fromlen;
	int len;
	struct radius_msg *msg, *reply = NULL;
	struct radius_hdr *hdr;
	struct wpabuf *rbuf;
	u32 val;
	int res;
	struct os_time now;

	fromlen = sizeof(from);
	len = recvfrom(sock, buf, sizeof(buf), 0,
		       (struct sockaddr *) &from.ss, &fromlen);
	if (len < 0) {
		wpa_printf(MSG_ERROR, "DAS: recvfrom: %s", strerror(errno));
		return;
	}

	os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
	from_port = ntohs(from.sin.sin_port);

	wpa_printf(MSG_DEBUG, "DAS: Received %d bytes from %s:%d",
		   len, abuf, from_port);
	if (das->client_addr.u.v4.s_addr != from.sin.sin_addr.s_addr) {
		wpa_printf(MSG_DEBUG, "DAS: Drop message from unknown client");
		return;
	}

	msg = radius_msg_parse(buf, len);
	if (msg == NULL) {
		wpa_printf(MSG_DEBUG, "DAS: Parsing incoming RADIUS packet "
			   "from %s:%d failed", abuf, from_port);
		return;
	}

	if (wpa_debug_level <= MSG_MSGDUMP)
		radius_msg_dump(msg);

	if (radius_msg_verify_das_req(msg, das->shared_secret,
				       das->shared_secret_len)) {
		wpa_printf(MSG_DEBUG, "DAS: Invalid authenticator in packet "
			   "from %s:%d - drop", abuf, from_port);
		goto fail;
	}

	os_get_time(&now);
	res = radius_msg_get_attr(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
				  (u8 *) &val, 4);
	if (res == 4) {
		u32 timestamp = ntohl(val);
		if ((unsigned int) abs((int) (now.sec - timestamp)) >
		    das->time_window) {
			wpa_printf(MSG_DEBUG, "DAS: Unacceptable "
				   "Event-Timestamp (%u; local time %u) in "
				   "packet from %s:%d - drop",
				   timestamp, (unsigned int) now.sec,
				   abuf, from_port);
			goto fail;
		}
	} else if (das->require_event_timestamp) {
		wpa_printf(MSG_DEBUG, "DAS: Missing Event-Timestamp in packet "
			   "from %s:%d - drop", abuf, from_port);
		goto fail;
	}

	hdr = radius_msg_get_hdr(msg);

	switch (hdr->code) {
	case RADIUS_CODE_DISCONNECT_REQUEST:
		reply = radius_das_disconnect(das, msg, abuf, from_port);
		break;
	case RADIUS_CODE_COA_REQUEST:
		/* TODO */
		reply = radius_msg_new(RADIUS_CODE_COA_NAK,
				       hdr->identifier);
		if (reply == NULL)
			break;

		/* Unsupported Service */
		if (!radius_msg_add_attr_int32(reply, RADIUS_ATTR_ERROR_CAUSE,
					       405)) {
			radius_msg_free(reply);
			reply = NULL;
			break;
		}
		break;
	default:
		wpa_printf(MSG_DEBUG, "DAS: Unexpected RADIUS code %u in "
			   "packet from %s:%d",
			   hdr->code, abuf, from_port);
	}

	if (reply) {
		wpa_printf(MSG_DEBUG, "DAS: Reply to %s:%d", abuf, from_port);

		if (!radius_msg_add_attr_int32(reply,
					       RADIUS_ATTR_EVENT_TIMESTAMP,
					       now.sec)) {
			wpa_printf(MSG_DEBUG, "DAS: Failed to add "
				   "Event-Timestamp attribute");
		}

		if (radius_msg_finish_das_resp(reply, das->shared_secret,
					       das->shared_secret_len, hdr) <
		    0) {
			wpa_printf(MSG_DEBUG, "DAS: Failed to add "
				   "Message-Authenticator attribute");
		}

		if (wpa_debug_level <= MSG_MSGDUMP)
			radius_msg_dump(reply);

		rbuf = radius_msg_get_buf(reply);
		res = sendto(das->sock, wpabuf_head(rbuf),
			     wpabuf_len(rbuf), 0,
			     (struct sockaddr *) &from.ss, fromlen);
		if (res < 0) {
			wpa_printf(MSG_ERROR, "DAS: sendto(to %s:%d): %s",
				   abuf, from_port, strerror(errno));
		}
	}

fail:
	radius_msg_free(msg);
	radius_msg_free(reply);
}
Exemplo n.º 7
0
static int radius_server_request(struct radius_server_data *data,
				 struct radius_msg *msg,
				 struct sockaddr_in *from,
				 struct radius_client *client)
{
	u8 *eap = NULL;
	size_t eap_len;
	int res, state_included;
	u8 statebuf[4], resp_id;
	unsigned int state;
	struct radius_session *sess;
	struct radius_msg *reply;
	struct eap_hdr *hdr;

	/* TODO: Implement duplicate packet processing */

	res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
				  sizeof(statebuf));
	state_included = res >= 0;
	if (res == sizeof(statebuf)) {
		state = (statebuf[0] << 24) | (statebuf[1] << 16) |
			(statebuf[2] << 8) | statebuf[3];
		sess = radius_server_get_session(client, state);
	} else {
		sess = NULL;
	}

	if (sess) {
		RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
	} else if (state_included) {
		RADIUS_DEBUG("State attribute included but no session found");
		radius_server_reject(data, client, msg, from);
		return -1;
	} else {
		sess = radius_server_get_new_session(data, client, msg);
		if (sess == NULL) {
			RADIUS_DEBUG("Could not create a new session");
			return -1;
		}
	}

	eap = radius_msg_get_eap(msg, &eap_len);
	if (eap == NULL) {
		RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
			     inet_ntoa(from->sin_addr));
		return -1;
	}

	RADIUS_DUMP("Received EAP data", eap, eap_len);
	if (eap_len >= sizeof(*hdr)) {
		hdr = (struct eap_hdr *) eap;
		resp_id = hdr->identifier;
	} else {
		resp_id = 0;
	}

	eap_set_eapRespData(sess->eap, eap, eap_len);
	free(eap);
	eap = NULL;
	sess->eapResp = TRUE;
	eap_sm_step(sess->eap);

	if (sess->eapReqData) {
		RADIUS_DUMP("EAP data from the state machine",
			    sess->eapReqData, sess->eapReqDataLen);
	} else if (sess->eapFail) {
		RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
			     "set - generate EAP-Failure");
		hdr = malloc(sizeof(*hdr));
		if (hdr) {
			memset(hdr, 0, sizeof(*hdr));
			hdr->identifier = resp_id;
			hdr->length = htons(sizeof(*hdr));
			sess->eapReqData = (u8 *) hdr;
			sess->eapReqDataLen = sizeof(*hdr);
		}
	} else {
		RADIUS_DEBUG("No EAP data from the state machine - ignore this"
			     " Access-Request silently (assuming it was a "
			     "duplicate)");
		return -1;
	}

	reply = radius_server_encapsulate_eap(data, client, sess, msg);

	free(sess->eapReqData);
	sess->eapReqData = NULL;
	sess->eapReqDataLen = 0;

	if (reply) {
		RADIUS_DEBUG("Reply to %s:%d", inet_ntoa(from->sin_addr),
			     ntohs(from->sin_port));
		if (wpa_debug_level <= MSG_MSGDUMP) {
			radius_msg_dump(reply);
		}

		res = sendto(data->auth_sock, reply->buf, reply->buf_used, 0,
			     (struct sockaddr *) from, sizeof(*from));
		if (res < 0) {
			perror("sendto[RADIUS SRV]");
		}
		radius_msg_free(reply);
		free(reply);
	}

	if (sess->eapSuccess || sess->eapFail) {
		RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
		radius_server_session_remove(data, sess);
	}

	return 0;
}