rfmpacket.java

用于传感器网络的节点操作系统 TinyOS 结构设计非常有意思

/*									tab:2
 *
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 * "Copyright (c) 2000 and The Regents of the University 
 * of California.  All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose, without fee, and without written
 * agreement is hereby granted, provided that the above copyright
 * notice and the following two paragraphs appear in all copies of
 * this software.
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 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY
 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
 * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
 * DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE
 * PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
 * CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
 * UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 * Authors:		Phil Levis
 * Date:        Aug 3 2001
 * Desc:        A simulation RFM packet datum.
 *
 */

package net.tinyos.sim;

import java.io.*;

public class RFMPacket {

    private static final int PACKET_LEN = 36; // The actual packet length without the TOSSIM header

    private long time;
    private short moteID;
    private byte[] packet;
    
    public RFMPacket(byte[] data) throws IOException {
	DataInputStream stream = new DataInputStream(new ByteArrayInputStream(data));
	packet = new byte[PACKET_LEN];
	
	time = stream.readLong();
	moteID = stream.readShort();
	stream.readFully(packet);
	
    }
    
    public long time() {return time;}
    public short moteID() {return moteID;}
    public byte[] data() {return packet;}
    
    public String toString() {
	String msg = "RFM Packet\n";
	msg += "Time: " + time + "\n";
	msg += "MoteID: " + moteID + "\n";
	msg += "Data:";
	for (int i = 0; i < PACKET_LEN; i++) {
	    if (i % 20 == 0) {
		msg += "\n";
	    }
	    String datum = Integer.toString((int)(packet[i] & 0xff), 16);
	    if (datum.length() == 1) {msg += "0";}
	    msg += datum;
	    msg += " ";
	}
	msg += "\n";
	return msg;
    }
    
}