abstract-fib.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef LFID_ABS_FIB_H
#define LFID_ABS_FIB_H

#include <set>
#include <unordered_map>

#include "ns3/abort.h"
#include "ns3/ndnSIM/helper/lfid/fib-nexthop.hpp"
#include "ns3/ptr.h"

namespace ns3 {
namespace ndn {

class GlobalRouter;

class AbstractFib {
public:
  using AllNodeFib = std::unordered_map<int, AbstractFib>;

  AbstractFib(const Ptr<GlobalRouter> own, int numNodes);

public:
  // Getters:
  const std::set<FibNextHop>&
  getNexthops(int dstId) const;

  const std::set<FibNextHop>&
  getUpwardNexthops(int dstId) const;

  void
  checkFib() const;

  int
  numEnabledNhPerDst(int dstId) const
  {
    NS_ABORT_UNLESS(dstId != nodeId);
    return static_cast<int>(getNexthops(dstId).size());
  }

  int
  getNodeId() const
  {
    return nodeId;
  }

  Ptr<GlobalRouter>
  getGR() const;

  std::string
  getName() const
  {
    return nodeName;
  }

  int
  getDegree() const
  {
    return nodeDegree;
  }

  int
  getNumDsts() const
  {
    return static_cast<int>(perDstFib.size());
  }

  bool
  contains(int dstId) const
  {
    return perDstFib.count(dstId) > 0;
  }

  // Functions for range-based loop:
  auto
  begin() const
  {
    return perDstFib.cbegin();
  }

  auto
  end() const
  {
    return perDstFib.cend();
  }

  // Setters:
  void
  insert(int dstId, const FibNextHop& nh);

  size_t
  erase(int dstId, int nhId);

private:
  void
  checkInputs();

  void
  createEmptyFib();

private:
  const int nodeId;           // Own node id
  const std::string nodeName; // Own node name
  const int numberOfNodes;
  const int nodeDegree;
  const Ptr<GlobalRouter> ownRouter;

  int upwardCounter;
  int totalNhCounter;

  // DstId -> set<FibNextHop>
  std::unordered_map<int, std::set<FibNextHop>> perDstFib;
  std::unordered_map<int, std::set<FibNextHop>> upwardPerDstFib;

  friend std::ostream&
  operator<<(std::ostream&, const AbstractFib& fib);
};

std::ostream&
operator<<(std::ostream& os, const AbstractFib& fib);

} // namespace ndn
} // namespace ns-3

#endif // LFID_ABS_FIB_H