dsdv-rtable.h

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/*
 * Copyright (c) 2010 Hemanth Narra
 *
 * 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: Hemanth Narra <hemanth@ittc.ku.com>
 *
 * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
 * ResiliNets Research Group  https://resilinets.org/
 * Information and Telecommunication Technology Center (ITTC)
 * and Department of Electrical Engineering and Computer Science
 * The University of Kansas Lawrence, KS USA.
 *
 * Work supported in part by NSF FIND (Future Internet Design) Program
 * under grant CNS-0626918 (Postmodern Internet Architecture),
 * NSF grant CNS-1050226 (Multilayer Network Resilience Analysis and Experimentation on GENI),
 * US Department of Defense (DoD), and ITTC at The University of Kansas.
 */
 
#ifndef DSDV_RTABLE_H
#define DSDV_RTABLE_H
 
#include "ns3/ipv4-route.h"
#include "ns3/ipv4.h"
#include "ns3/net-device.h"
#include "ns3/output-stream-wrapper.h"
#include "ns3/timer.h"
 
#include <cassert>
#include <map>
#include <sys/types.h>
 
namespace ns3
{
namespace dsdv
{
enum RouteFlags
{
    VALID = 0,   // !< VALID
    INVALID = 1, // !< INVALID
};
 
class RoutingTableEntry
{
  public:
    RoutingTableEntry(Ptr<NetDevice> dev = nullptr,
                      Ipv4Address dst = Ipv4Address(),
                      uint32_t seqNo = 0,
                      Ipv4InterfaceAddress iface = Ipv4InterfaceAddress(),
                      uint32_t hops = 0,
                      Ipv4Address nextHop = Ipv4Address(),
                      Time lifetime = Simulator::Now(),
                      Time settlingTime = Simulator::Now(),
                      bool changedEntries = false);
 
    ~RoutingTableEntry();
 
    Ipv4Address GetDestination() const
    {
        return m_ipv4Route->GetDestination();
    }
 
    Ptr<Ipv4Route> GetRoute() const
    {
        return m_ipv4Route;
    }
 
    void SetRoute(Ptr<Ipv4Route> route)
    {
        m_ipv4Route = route;
    }
 
    void SetNextHop(Ipv4Address nextHop)
    {
        m_ipv4Route->SetGateway(nextHop);
    }
 
    Ipv4Address GetNextHop() const
    {
        return m_ipv4Route->GetGateway();
    }
 
    void SetOutputDevice(Ptr<NetDevice> device)
    {
        m_ipv4Route->SetOutputDevice(device);
    }
 
    Ptr<NetDevice> GetOutputDevice() const
    {
        return m_ipv4Route->GetOutputDevice();
    }
 
    Ipv4InterfaceAddress GetInterface() const
    {
        return m_iface;
    }
 
    void SetInterface(Ipv4InterfaceAddress iface)
    {
        m_iface = iface;
    }
 
    void SetSeqNo(uint32_t sequenceNumber)
    {
        m_seqNo = sequenceNumber;
    }
 
    uint32_t GetSeqNo() const
    {
        return m_seqNo;
    }
 
    void SetHop(uint32_t hopCount)
    {
        m_hops = hopCount;
    }
 
    uint32_t GetHop() const
    {
        return m_hops;
    }
 
    void SetLifeTime(Time lifeTime)
    {
        m_lifeTime = lifeTime;
    }
 
    Time GetLifeTime() const
    {
        return (Simulator::Now() - m_lifeTime);
    }
 
    void SetSettlingTime(Time settlingTime)
    {
        m_settlingTime = settlingTime;
    }
 
    Time GetSettlingTime() const
    {
        return m_settlingTime;
    }
 
    void SetFlag(RouteFlags flag)
    {
        m_flag = flag;
    }
 
    RouteFlags GetFlag() const
    {
        return m_flag;
    }
 
    void SetEntriesChanged(bool entriesChanged)
    {
        m_entriesChanged = entriesChanged;
    }
 
    bool GetEntriesChanged() const
    {
        return m_entriesChanged;
    }
 
    bool operator==(const Ipv4Address destination) const
    {
        return (m_ipv4Route->GetDestination() == destination);
    }
 
    void Print(Ptr<OutputStreamWrapper> stream, Time::Unit unit = Time::S) const;
 
  private:
    // Fields
    uint32_t m_seqNo;
    uint32_t m_hops;
    Time m_lifeTime;
    Ptr<Ipv4Route> m_ipv4Route;
    Ipv4InterfaceAddress m_iface;
    RouteFlags m_flag;
    Time m_settlingTime;
    bool m_entriesChanged;
};
 
class RoutingTable
{
  public:
    RoutingTable();
    bool AddRoute(RoutingTableEntry& r);
    bool DeleteRoute(Ipv4Address dst);
    bool LookupRoute(Ipv4Address dst, RoutingTableEntry& rt);
    bool LookupRoute(Ipv4Address id, RoutingTableEntry& rt, bool forRouteInput);
    bool Update(RoutingTableEntry& rt);
    void GetListOfDestinationWithNextHop(Ipv4Address nxtHp,
                                         std::map<Ipv4Address, RoutingTableEntry>& dstList);
    void GetListOfAllRoutes(std::map<Ipv4Address, RoutingTableEntry>& allRoutes);
    void DeleteAllRoutesFromInterface(Ipv4InterfaceAddress iface);
 
    void Clear()
    {
        m_ipv4AddressEntry.clear();
    }
 
    void Purge(std::map<Ipv4Address, RoutingTableEntry>& removedAddresses);
    void Print(Ptr<OutputStreamWrapper> stream, Time::Unit unit = Time::S) const;
    uint32_t RoutingTableSize();
    bool AddIpv4Event(Ipv4Address address, EventId id);
    bool DeleteIpv4Event(Ipv4Address address);
    bool AnyRunningEvent(Ipv4Address address);
    bool ForceDeleteIpv4Event(Ipv4Address address);
    EventId GetEventId(Ipv4Address address);
 
    Time Getholddowntime() const
    {
        return m_holddownTime;
    }
 
    void Setholddowntime(Time t)
    {
        m_holddownTime = t;
    }
 
  private:
    // Fields
    std::map<Ipv4Address, RoutingTableEntry> m_ipv4AddressEntry;
    std::map<Ipv4Address, EventId> m_ipv4Events;
    Time m_holddownTime;
};
} // namespace dsdv
} // namespace ns3
#endif /* DSDV_RTABLE_H */