identificationseqnrpacket.java

来自「java语言开发的P2P流媒体系统」· Java 代码 · 共 89 行

/* 
 * P2P-Radio - Peer to peer streaming system
 * Project homepage: http://p2p-radio.sourceforge.net/
 * Copyright (C) 2003-2004 Michael Kaufmann <[e-mail]>
 * 
 * ---------------------------------------------------------------------------
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * ---------------------------------------------------------------------------
 */

package p2pradio.packets;

public class IdentificationSeqNrPacket extends IdentificationPacket
{
	private long resumeSeqNr;
	private long headerSeqNr;
	private long metadataSeqNr;
			
	public IdentificationSeqNrPacket(int senderPort, long resumeSeqNr, long headerSeqNr, long metadataSeqNr)
	{
		this(new byte[getMaxLength()], senderPort, resumeSeqNr, headerSeqNr, metadataSeqNr);
	}
	
	public IdentificationSeqNrPacket(byte content[], int senderPort, long resumeSeqNr, long headerSeqNr, long metadataSeqNr)
	{
		super(Packet.IDENTIFICATION_SEQNR, content, senderPort);
		
		this.resumeSeqNr = resumeSeqNr;
		writeLong(resumeSeqNr);
		
		this.headerSeqNr = headerSeqNr;
		writeLong(headerSeqNr);
		
		this.metadataSeqNr = metadataSeqNr;
		writeLong(metadataSeqNr);
	}
	
	protected IdentificationSeqNrPacket(byte content[], int contentLength)
	{
		super(content, contentLength);
		
		resumeSeqNr = readLong();
		headerSeqNr = readLong();
		metadataSeqNr = readLong();
	}
	
	protected static int getMaxLength()
	{
		return IdentificationPacket.getMaxLength() + 8 + 8 + 8;
	}
	
	protected String getTypeString()
	{
		return "IdentificationSeqNr"; //$NON-NLS-1$
	}
	
	public int getSenderPort()
	{
		return super.getPort();
	}
	
	public long getResumeSeqNr()
	{
		return resumeSeqNr;
	}
	
	public long getHeaderSeqNr()
	{
		return headerSeqNr;
	}
	
	public long getMetadataSeqNr()
	{
		return metadataSeqNr;
	}
}