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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011 University of California, Los Angeles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* 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
*
* Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
*/
#ifndef _CCNX_H_
#define _CCNX_H_
#include "ns3/object.h"
#include "ns3/socket.h"
#include "ns3/callback.h"
namespace ns3 {
class Node;
class NetDevice;
class Packet;
class CcnxForwardingStrategy;
class CcnxFace;
class CcnxContentObjectHeader;
class CcnxInterestHeader;
/**
* \internal
* \brief Private namespace for CCNx content store implementation
*/
namespace __ccnx_private
{
class i_face {};
class i_metric {};
class i_nth {};
class i_prefix {};
class i_ordered {}; ///< tag for Boost.MultiIndex container (ordered by prefix)
class i_mru {};
}
#define MILLI_SECOND 1
#define SECOND 1000
// default data size
#define NDN_DEFAULT_DATA_SIZE 1024
#define NDN_INTEREST_RESET_PERIOD (10*MILLI_SECOND)
/**
* \defgroup ccnx NDN abstraction
*
* This is an abstract implementation of NDN protocol
*/
/**
* \ingroup ccnx
* \brief Interface to manage Ccnx stack
*
* This class defines the API to manipulate the following aspects of
* the Ccnx stack implementation:
* -# register a face (CcnxFace-derived object) for use by the Ccnx
* layer
* -# register forwarding strategy (CcnxForwardingStrategy-derived
* object) to use by Ccnx stack
* -# export Ccnx configuration attributes
*
* Each CcnxFace-derived object has conceptually a single Ccnx
* interface associated with it.
*
* In addition, this class defines CCNx packet coding constants
*
* \see CcnxFace, CcnxForwardingStrategy
*/
class Ccnx : public Object
{
public:
enum ForwardingStrategy
{
NDN_FLOODING = 1,
NDN_BESTROUTE = 2,
NDN_RANKING = 3
};
/**
* \brief Interface ID
*
* \return interface ID
*/
static TypeId GetTypeId ();
/**
* \brief Send an Interest packet to a specified face
*
* \param face face where to send this packet
* \param header Interest header
* \param packet fully prepared CCNx packet to send
*
* Higher-level layers (forwarding strategy in particular) call this
* method to send a packet down the stack to the MAC and PHY layers.
*/
virtual void
SendInterest (const Ptr<CcnxFace> &face,
const Ptr<CcnxInterestHeader> &header,
const Ptr<Packet> &packet) = 0;
/**
* \brief Send a ContentObject packet to a specified face
*
* \param face face where to send this packet
* \param header ContentObject header
* \param packet fully prepared CCNx packet to send
*
* Higher-level layers (forwarding strategy in particular) call this
* method to send a packet down the stack to the MAC and PHY layers.
*/
virtual void
SendContentObject (const Ptr<CcnxFace> &face,
const Ptr<CcnxContentObjectHeader> &header,
const Ptr<Packet> &packet) = 0;
/**
* \brief Lower layers calls this method after demultiplexing
*
* Lower-layer-dependent implementation of CcnxFace will do actual work
* to set up demultiplexing and call this function as a callback
*
* \param face face from which packet came from
* \param p the packet
*/
virtual void
Receive (const Ptr<CcnxFace> &face, const Ptr<const Packet> &p) = 0;
/**
* \brief Register a new forwarding strategy to be used by this Ccnx
* stack
*
* This call will replace any forwarding strategy that has been
* previously registered.
*
* \param forwardingStrategy smart pointer to CcnxForwardingStrategy
* object
*/
virtual void
SetForwardingStrategy (Ptr<CcnxForwardingStrategy> forwardingStrategy) = 0;
/**
* \brief Get the forwarding strategy being used by this Ccnx stack
*
* \returns smart pointer to CcnxForwardingStrategy object, or null
* pointer if none
*/
virtual Ptr<CcnxForwardingStrategy>
GetForwardingStrategy (void) const = 0;
/**
* \brief Add face to CCNx stack
*
* \param face smart pointer to CcnxFace-derived object
* (CcnxLocalFace, CcnxNetDeviceFace, CcnxUdpFace) \returns the
* index of the Ccnx interface added.
*
* \see CcnxLocalFace, CcnxNetDeviceFace, CcnxUdpFace
*/
virtual uint32_t
AddFace (const Ptr<CcnxFace> &face) = 0;
/**
* \brief Get current number of faces added to CCNx stack
*
* \returns the number of faces
*/
virtual uint32_t
GetNFaces (void) const = 0;
/**
* \brief Get face by face index
* \param face The face number of an Ccnx interface.
* \returns The CcnxFace associated with the Ccnx face number.
*/
virtual Ptr<CcnxFace>
GetFace (uint32_t face) const = 0;
/**
* \brief Remove face from ccnx stack (remove callbacks)
*/
virtual void
RemoveFace (Ptr<CcnxFace> face) = 0;
};
} // namespace ns3
#endif /* _CCNX_H_ */