IPacket.java

/*
 * Copyright (c) 2011,2013 Big Switch Networks, Inc.
 *
 * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/legal/epl-v10.html
 *
 * 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 file incorporates work covered by the following copyright and
 * permission notice:
 *
 *    Originally created by David Erickson, Stanford University 
 *
 *    Licensed 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. 
 */

package org.sdnplatform.packet;

/**
*
* @author David Erickson (daviderickson@cs.stanford.edu)
*/
public interface IPacket {
    /**
     * 
     * @return
     */
    public IPacket getPayload();

    /**
     * 
     * @param packet
     * @return
     */
    public IPacket setPayload(IPacket packet);

    /**
     * 
     * @return
     */
    public IPacket getParent();

    /**
     * 
     * @param packet
     * @return
     */
    public IPacket setParent(IPacket packet);

    /**
     * Reset any checksums as needed, and call resetChecksum on all parents
     */
    public void resetChecksum();
    
    /**
     * Sets all payloads parent packet if applicable, then serializes this 
     * packet and all payloads
     * @return a byte[] containing this packet and payloads
     */
    public byte[] serialize();

    /**
     * Deserializes this packet layer and all possible payloads
     * @param data
     * @param offset offset to start deserializing from
     * @param length length of the data to deserialize
     * @return the deserialized data
     */
    public IPacket deserialize(byte[] data, int offset, int length);
    
    /** Clone this packet and its payload packet but not its parent. 
     * 
     * @return
     */
    public Object clone();
}