rib.hpp

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

#include "rib-entry.hpp"
#include "rib-update-batch.hpp"

#include <ndn-cxx/mgmt/nfd/control-parameters.hpp>

namespace nfd {
namespace rib {

using ndn::nfd::ControlParameters;

class FibUpdater;

struct RibRouteRef
{
  shared_ptr<RibEntry> entry;
  RibEntry::const_iterator route;
};

class Rib : noncopyable
{
public:
  typedef std::list<shared_ptr<RibEntry>> RibEntryList;
  typedef std::map<Name, shared_ptr<RibEntry>> RibTable;
  typedef RibTable::const_iterator const_iterator;
  typedef std::map<uint64_t, std::list<shared_ptr<RibEntry>>> FaceLookupTable;
  typedef bool (*RouteComparePredicate)(const Route&, const Route&);
  typedef std::set<Route, RouteComparePredicate> RouteSet;

  Rib();

  ~Rib();

  void
  setFibUpdater(FibUpdater* updater);

  const_iterator
  find(const Name& prefix) const;

  Route*
  find(const Name& prefix, const Route& route) const;

  const_iterator
  begin() const;

  const_iterator
  end() const;

  size_t
  size() const;

  bool
  empty() const;

  shared_ptr<RibEntry>
  findParent(const Name& prefix) const;

  std::list<shared_ptr<RibEntry>>
  findDescendants(const Name& prefix) const;

  std::list<shared_ptr<RibEntry>>
  findDescendantsForNonInsertedName(const Name& prefix) const;

public:
  typedef function<void()> UpdateSuccessCallback;
  typedef function<void(uint32_t code, const std::string& error)> UpdateFailureCallback;

  void
  beginApplyUpdate(const RibUpdate& update,
                   const UpdateSuccessCallback& onSuccess,
                   const UpdateFailureCallback& onFailure);

  void
  beginRemoveFace(uint64_t faceId);

  void
  onFibUpdateSuccess(const RibUpdateBatch& batch,
                     const RibUpdateList& inheritedRoutes,
                     const Rib::UpdateSuccessCallback& onSuccess);

  void
  onFibUpdateFailure(const Rib::UpdateFailureCallback& onFailure,
                     uint32_t code, const std::string& error);

  void
  onRouteExpiration(const Name& prefix, const Route& route);

  void
  insert(const Name& prefix, const Route& route);

private:
  void
  addUpdateToQueue(const RibUpdate& update,
                   const Rib::UpdateSuccessCallback& onSuccess,
                   const Rib::UpdateFailureCallback& onFailure);

  void
  sendBatchFromQueue();

PUBLIC_WITH_TESTS_ELSE_PRIVATE:
  // Used by RibManager unit-tests to get sent batch to simulate successful FIB update
  function<void(RibUpdateBatch)> m_onSendBatchFromQueue;

  void
  erase(const Name& prefix, const Route& route);

private:
  RibTable::iterator
  eraseEntry(RibTable::iterator it);

  void
  updateRib(const RibUpdateBatch& batch);

  RouteSet
  getAncestorRoutes(const RibEntry& entry) const;

  RouteSet
  getAncestorRoutes(const Name& name) const;

  void
  modifyInheritedRoutes(const RibUpdateList& inheritedRoutes);

PUBLIC_WITH_TESTS_ELSE_PRIVATE:
  typedef std::pair<const Name&,const Route&> NameAndRoute;

  std::list<NameAndRoute>
  findRoutesWithFaceId(uint64_t faceId);

public:
  ndn::util::signal::Signal<Rib, Name> afterInsertEntry;

  ndn::util::signal::Signal<Rib, Name> afterEraseEntry;

  ndn::util::signal::Signal<Rib, RibRouteRef> afterAddRoute;

  ndn::util::signal::Signal<Rib, RibRouteRef> beforeRemoveRoute;

private:
  RibTable m_rib;
  FaceLookupTable m_faceMap;
  FibUpdater* m_fibUpdater;

  size_t m_nItems;

  friend class FibUpdater;

private:
  struct UpdateQueueItem
  {
    RibUpdateBatch batch;
    const Rib::UpdateSuccessCallback managerSuccessCallback;
    const Rib::UpdateFailureCallback managerFailureCallback;
  };

PUBLIC_WITH_TESTS_ELSE_PRIVATE:
  typedef std::list<UpdateQueueItem> UpdateQueue;
  UpdateQueue m_updateBatches;

private:
  bool m_isUpdateInProgress;
};

inline Rib::const_iterator
Rib::begin() const
{
  return m_rib.begin();
}

inline Rib::const_iterator
Rib::end() const
{
  return m_rib.end();
}

inline size_t
Rib::size() const
{
  return m_nItems;
}

inline bool
Rib::empty() const
{
  return m_rib.empty();
}

std::ostream&
operator<<(std::ostream& os, const Rib& rib);

} // namespace rib
} // namespace nfd

#endif // NFD_RIB_RIB_HPP