cabecera.java

multiplataform real time Linux monitor

/** LiMon-JClient
 *  Copyright (C) 2006 Marcelo Busico
 *
 *  Author:  Marcelo Busico    [e-mail]
 *
 *  This program is free software which I release under the GNU General Public
 *  License. You may redistribute and/or modify this program under the terms
 *  of that 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.  Version 2 is in the
 *  LICENSE.txt file in the top level directory of this distribution.
 * 
 *  To get a copy of the GNU General Puplic License, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package limonclient;

import java.io.*;

public class Cabecera {
    private int identificador;
    private String password;
    
    public final static int IdConfirmaPassword=1;

    public final static int IdPedirEstadoMicro=10;
    public final static int IdPedirEstadoMemoria=11;
    public final static int IdPedirEstadoIntercambio=12;
    public final static int IdPedirUpTime=13;
    public final static int IdPedirTemperatura=14;
    public final static int IdPedirEstadoServidores=15;
    public final static int IdPedirEstadoDisco=16;
    public final static int IdPedirHora=17;
    public final static int IdPedirFecha=18;
    
    public final static int IdDevolverEstadoMicro=110;
    public final static int IdDevolverEstadoMemoria=111;
    public final static int IdDevolverEstadoIntercambio=112;
    public final static int IdDevolverUpTime=113;
    public final static int IdDevolverTemperatura=114;
    public final static int IdDevolverEstadoServidores=115;
    public final static int IdDevolverEstadoDisco=116;
    public final static int IdDevolverHora=117;
    public final static int IdDevolverFecha=118;
    
    public final static int IdPasswordCorrecta=200;
    public final static int IdPasswordIncorrecta=201;
    public final static int IdDesconexion=202;
            
    /** Crea una nueva instancia de Cabecera */
    public Cabecera() {
        identificador=0;
        password="";
    }

    public Cabecera(int id, String pass) {
        identificador=id;
        password=pass;
    }
    
    // Establece el identificador de cabecera
    public void setIdentificador(int id)
    {
        identificador=id;
    }
    
    //Devuelve el identificador de cabecera
    public int getIdentificador()
    {
        return identificador;
    }
    
    // Establece la contraseña de la conexión
    public void setPassword(String pass)
    {
        password=pass;
    }
    
    //Devuelve la contraseña de cabecera
    public String getPassword()
    {
        return password;
    }

    public void recibirCabecera(java.io.DataInputStream in) throws IOException
    {
        //Lee el identificador de cabecera
        identificador = in.readInt();

        // Array de bytes auxiliar para la lectura de la cadena.
        byte [] aux = null;
        aux = new byte[64];  // Se le da el tamaño 
        int i;
        
        //Lee la password
        in.read(aux, 0, 64); // Se leen los bytes
        
        //Se busca el final de la cadena
        for(i=0;i<64;i++)
        {
            if(aux[i]==0)
                break;
        }
        
        //Copia solo los bytes no nulos en pass
        byte [] pass = new byte[i];
        for(int j=0; j<i; j++)
            pass[j]=aux[j];
        
        password = new String (pass); // Se convierten a String
    }

    public void enviarCabecera(java.io.DataOutputStream out) throws IOException
    {
        //Escribe el identificador de la cabecera
        out.writeInt(identificador);
        
        //Envia la password como bytes
        out.writeBytes(password);

        //Se envía el \0 del final y
        //envia el relleno de la password hasta 63 bytes
        out.writeByte ('\0');
        
        for(int i=password.length()+1;i<64;i++)
            out.writeByte(0);
    }
}