//===========================================================================
//  $Name:  $
//  $Id: ArtsBgp4DPAttribute.hh,v 1.1.1.1 2000/03/29 22:53:56 kkeys Exp $
//===========================================================================
//  CAIDA Copyright Notice
//
//  By accessing this software, arts++, you are duly informed
//  of and agree to be bound by the conditions described below in this
//  notice:
//
//  This software product, arts++, is developed by Daniel W. McRobb, and
//  copyrighted(C) 1998 by the University of California, San Diego
//  (UCSD), with all rights reserved.  UCSD administers the CAIDA grant,
//  NCR-9711092, under which part of this code was developed.
//
//  There is no charge for arts++ software. You can redistribute it
//  and/or modify it under the terms of the GNU General Public License,
//  v.  2 dated June 1991 which is incorporated by reference herein.
//  arts++ is distributed WITHOUT ANY WARRANTY, IMPLIED OR EXPRESS, OF
//  MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE or that the use
//  of it will not infringe on any third party's intellectual property
//  rights.
//
//  You should have received a copy of the GNU GPL along with arts++.
//  Copies can also be obtained from:
//
//    http://www.gnu.org/copyleft/gpl.html
//
//  or by writing to:
//
//    University of California, San Diego
//
//    SDSC/CAIDA
//    9500 Gilman Dr., MS-0505
//    La Jolla, CA 92093 - 0505  USA
//
//  Or contact:
//
//    info@caida.org
//===========================================================================

#ifndef _ARTSBGP4DPATTRIBUTE_HH_
#define _ARTSBGP4DPATTRIBUTE_HH_

//---------------------------------------------------------------------------
//  class ArtsBgp4DPAttribute
//---------------------------------------------------------------------------
//  This class abstracts a BGP4 DPA (Destination Preference Attribute)
//  value.
//---------------------------------------------------------------------------
class ArtsBgp4DPAttribute
{
public:
  //-------------------------------------------------------------------------
  //                           uint16_t AS() const
  //.........................................................................
  //  Returns the AS number in the DPA attribute.
  //-------------------------------------------------------------------------
  uint16_t AS() const;
  
  //-------------------------------------------------------------------------
  //                        uint16_t AS(uint16_t as)
  //.........................................................................
  //  Sets and returns the AS number in the DPA attribute.
  //-------------------------------------------------------------------------
  uint16_t AS(uint16_t as);
  
  //-------------------------------------------------------------------------
  //                         uint32_t Value() const
  //.........................................................................
  //  Returns the value in the DPA attribute.
  //-------------------------------------------------------------------------
  uint32_t Value() const;
  
  //-------------------------------------------------------------------------
  //                     uint32_t Value(uint32_t value)
  //.........................................................................
  //  Sets and returns the value in the DPA attribute.
  //-------------------------------------------------------------------------
  uint32_t Value(uint32_t value);

  //-------------------------------------------------------------------------
  // ArtsBgp4DPAttribute & operator = (const ArtsBgp4DPAttribute & attribute)
  //.........................................................................
  //  Overloaded '=' operator for assigning the value of an
  //  ArtsBgp4DPAttribute from another ArtsBgp4DPAttribute.
  //-------------------------------------------------------------------------
  ArtsBgp4DPAttribute & operator = (const ArtsBgp4DPAttribute & attribute);
  
private:
  uint16_t   _as;
  uint32_t   _value;
};

#endif  // _ARTSBGP4DPATTRIBUTE_HH_