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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011-2013 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 _NDN_FIB_H_
#define _NDN_FIB_H_
#include "ns3/simple-ref-count.h"
#include "ns3/node.h"
#include "ns3/ndn-fib-entry.h"
namespace ns3 {
namespace ndn {
class InterestHeader;
/**
* \ingroup ndn
* \brief Class implementing FIB functionality
*/
class Fib : public Object
{
public:
/**
* \brief Interface ID
*
* \return interface ID
*/
static TypeId GetTypeId ();
/**
* @brief Default constructor
*/
Fib () {}
/**
* @brief Virtual destructor
*/
virtual ~Fib () { };
/**
* \brief Perform longest prefix match
*
* \todo Implement exclude filters
*
* \param interest Interest packet header
* \returns If entry found a valid iterator (Ptr<fib::Entry>) will be returned, otherwise End () (==0)
*/
virtual Ptr<fib::Entry>
LongestPrefixMatch (const InterestHeader &interest) = 0;
/**
* \brief Add or update FIB entry
*
* If the entry exists, metric will be updated. Otherwise, new entry will be created
*
* Entries in FIB never deleted. They can be invalidated with metric==NETWORK_UNREACHABLE
*
* @param name Prefix
* @param face Forwarding face
* @param metric Routing metric
*/
virtual Ptr<fib::Entry>
Add (const Name &prefix, Ptr<Face> face, int32_t metric) = 0;
/**
* \brief Add or update FIB entry using smart pointer to prefix
*
* If the entry exists, metric will be updated. Otherwise, new entry will be created
*
* Entries in FIB never deleted. They can be invalidated with metric==NETWORK_UNREACHABLE
*
* @param name Smart pointer to prefix
* @param face Forwarding face
* @param metric Routing metric
*/
virtual Ptr<fib::Entry>
Add (const Ptr<const Name> &prefix, Ptr<Face> face, int32_t metric) = 0;
/**
* @brief Remove FIB entry
*
* ! ATTENTION ! Use with caution. All PIT entries referencing the corresponding FIB entry will become invalid.
* So, simulation may crash.
*
* @param name Smart pointer to prefix
*/
virtual void
Remove (const Ptr<const Name> &prefix) = 0;
// /**
// * @brief Invalidate FIB entry ("Safe" version of Remove)
// *
// * All faces for the entry will be assigned maximum routing metric and NDN_FIB_RED status
// * @param name Smart pointer to prefix
// */
// virtual void
// Invalidate (const Ptr<const Name> &prefix) = 0;
/**
* @brief Invalidate all FIB entries
*/
virtual void
InvalidateAll () = 0;
/**
* @brief Remove all references to a face from FIB. If for some enty that face was the only element,
* this FIB entry will be removed.
*/
virtual void
RemoveFromAll (Ptr<Face> face) = 0;
/**
* @brief Print out entries in FIB
*/
virtual void
Print (std::ostream &os) const = 0;
/**
* @brief Get number of entries in FIB
*/
virtual uint32_t
GetSize () const = 0;
/**
* @brief Return first element of FIB (no order guaranteed)
*/
virtual Ptr<const fib::Entry>
Begin () const = 0;
/**
* @brief Return first element of FIB (no order guaranteed)
*/
virtual Ptr<fib::Entry>
Begin () = 0;
/**
* @brief Return item next after last (no order guaranteed)
*/
virtual Ptr<const fib::Entry>
End () const = 0;
/**
* @brief Return item next after last (no order guaranteed)
*/
virtual Ptr<fib::Entry>
End () = 0;
/**
* @brief Advance the iterator
*/
virtual Ptr<const fib::Entry>
Next (Ptr<const fib::Entry>) const = 0;
/**
* @brief Advance the iterator
*/
virtual Ptr<fib::Entry>
Next (Ptr<fib::Entry>) = 0;
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
/**
* @brief Static call to cheat python bindings
*/
static inline Ptr<Fib>
GetFib (Ptr<Object> node);
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
private:
Fib (const Fib&) {} ; ///< \brief copy constructor is disabled
};
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
std::ostream& operator<< (std::ostream& os, const Fib &fib);
Ptr<Fib>
Fib::GetFib (Ptr<Object> node)
{
return node->GetObject<Fib> ();
}
} // namespace ndn
} // namespace ns3
#endif // _NDN_FIB_H_