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/*
* (C) 2002 Paul Wilkinson wilko@users.sourceforge.net
*
* 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
*
*/
/*
* FLAPFrame.java
*
* Created on 3 May 2002, 14:51
*/
package com.wilko.jaim;
/**
*
* @author paulw
* @version $Revision: 1.4 $
*/
public abstract class FLAPFrame {
public static final int FLAP_FRAME_SIGNON=1;
public static final int FLAP_FRAME_DATA=2;
public static final int FLAP_FRAME_ERROR=3;
public static final int FLAP_FRAME_SIGNOFF=4;
public static final int FLAP_FRAME_KEEP_ALIVE=5;
public static final int FLAP_DATA_OFFSET=6;
protected byte[] frame;
protected int fLen;
/** Creates new FLAPFrame */
public FLAPFrame() {
initialise();
}
protected void setFrameData(byte b[])
{
frame=new byte[b.length];
fLen=b.length;
System.arraycopy(b,0,frame,0,b.length);
}
protected void initialise()
{
frame = new byte[8192];
frame[0]=(byte)'*';
frame[1]=0;
frame[2]=0;
frame[3]=0;
frame[4]=0;
frame[5]=0;
fLen=6;
}
public void setSequence(int sequence)
{
frame[2]=(byte)((sequence/256)&0xff);
frame[3]=(byte)(sequence&0xff);
}
public int getSequence()
{
return((frame[2]&0xff)*256+(frame[3]&0xff));
}
public int getLength()
{
return((frame[4]&0xff)*256+(frame[5]&0xff));
}
public void setLength(int length)
{
frame[4]=(byte)(length/256);
frame[5]=(byte)(length&0xff);
fLen=length+FLAP_DATA_OFFSET;
}
public byte[] getFrameData()
{
byte[] b=new byte[fLen];
System.arraycopy(frame,0,b,0,fLen);
return(b);
}
public String toString()
{
StringBuffer temp=new StringBuffer();
for (int i=0;i<fLen;i++)
{
int k=frame[i]&0xff;
if (k<16)
{
temp.append("0"+Integer.toHexString(k)+" ");
}
else
{
temp.append(Integer.toHexString(k)+" ");
}
}
return(temp.toString());
}
public abstract int getFLAPFrameType();
}
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