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///////////////////////////////////////////////////////////////////////////////
//                                                                             
// JTOpen (IBM Toolbox for Java - OSS version)                                 
//                                                                             
// Filename: PacketTooBig.java
//                                                                             
// The source code contained herein is licensed under the IBM Public License   
// Version 1.0, which has been approved by the Open Source Initiative.         
// Copyright (C) 2002 International Business Machines Corporation and     
// others. All rights reserved.                                                
//                                                                             
///////////////////////////////////////////////////////////////////////////////

package com.ibm.as400.util.commtrace;

import java.util.Properties;

/**
 * A PacketTooBig Header.

 * Extends Message's methods to parse, print, and allow easy access to the PacketTooBig Header.
 */
public class PacketTooBig extends Message {
	private Field mtu= new Dec(rawheader.slice(0, 32));

	/**
	 * Creates and parses the data of this header.  
	 * @param data	The raw data of this header. 
	 */
	PacketTooBig(BitBuf data) {
		super(data);
		super.type= PKTTOBIG;
	}

	/**
	 * Returns the length of this header.
	 * @return Will always return 32.
	 */
	public int getHeaderLen() {
		return 32;
	}

	/**
	 * Returns the next header in the packet.
	 * @return Will always return a IP6Header.
	 */
	public Header getNextHeader() {
		return new IP6Header(rawpayload);
	}

    /**
     * Returns a printable representation of this header.
     * @param filter	    FormatProperties object for filtering this header.
     * @return	    Returns a string representation of this header.
     */
	public String toString(FormatProperties filter) {
		return printHexHeader()
			+ "MTU: "
			+ mtu
			+ "\n"
			+ "\t\t\t"
			+ OFFPKT
			+ ":\n"
			+ printnext(filter);
	}

	/**
	 * Returns the MTU of this PacketTooBig Message. 
	 * @return String containing a decimal representation of the MTU. 
	 */
	public String getMTU() {
		return mtu.toString();
	}
}