/*
 * Licensed to Green Energy Corp (www.greenenergycorp.com) under one or
 * more contributor license agreements. See the NOTICE file distributed
 * with this work for additional information regarding copyright ownership.
 * Green Energy Corp licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This project was forked on 01/01/2013 by Automatak, LLC and modifications
 * may have been made to this file. Automatak, LLC licenses these modifications
 * to you under the terms of the License.
 */

#ifndef OPENDNP3_ILINK_LISTENER_H
#define OPENDNP3_ILINK_LISTENER_H

#include <opendnp3/gen/LinkStatus.h>

namespace opendnp3
{

/**
* Various optional callbacks that can be received for the link layer
*/
class ILinkListener
{
public:

	/// Called when a the reset/unreset status of the link layer changes
	virtual void OnStateChange(LinkStatus value) {}

	/// Called when the keep alive timer elapses. This doesn't denote a keep-alive failure, it's just a notification
	virtual void OnKeepAliveInitiated() {}

	/// Called when a keep alive message (request link status) receives no response
	virtual void OnKeepAliveFailure() {}

	/// Called when a keep alive message receives a valid response
	virtual void OnKeepAliveSuccess() {}
};

}

#endif
