dsr-rcache.h

Go to the documentation of this file.

/*
 * Copyright (c) 2011 Yufei Cheng
 *
 * 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: Yufei Cheng   <yfcheng@ittc.ku.edu>
 *              Song Luan <lsuper@mail.ustc.edu.cn> (Implemented Link Cache using dijsktra algorithm
 * to get the best route)
 *
 * 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 DSR_RCACHE_H
#define DSR_RCACHE_H
 
#include "dsr-option-header.h"
 
#include "ns3/arp-cache.h"
#include "ns3/callback.h"
#include "ns3/enum.h"
#include "ns3/header.h"
#include "ns3/ipv4-address.h"
#include "ns3/ipv4-l3-protocol.h"
#include "ns3/ipv4-route.h"
#include "ns3/ipv4.h"
#include "ns3/net-device.h"
#include "ns3/nstime.h"
#include "ns3/simple-ref-count.h"
#include "ns3/simulator.h"
#include "ns3/timer.h"
 
#include <cassert>
#include <iostream>
#include <map>
#include <stdint.h>
#include <sys/types.h>
#include <vector>
 
namespace ns3
{
 
class Time;
class WifiMacHeader;
 
namespace dsr
{
 
struct Link
{
    Ipv4Address m_low;  
    Ipv4Address m_high; 
 
    Link(Ipv4Address ip1, Ipv4Address ip2)
    {
        if (ip1 < ip2)
        {
            m_low = ip1;
            m_high = ip2;
        }
        else
        {
            m_low = ip2;
            m_high = ip1;
        }
    }
 
    bool operator<(const Link& L) const
    {
        if (m_low < L.m_low)
        {
            return true;
        }
        else if (m_low == L.m_low)
        {
            return (m_high < L.m_high);
        }
        else
        {
            return false;
        }
    }
 
    void Print() const;
};
 
class DsrLinkStab
{
  public:
    DsrLinkStab(Time linkStab = Simulator::Now());
    virtual ~DsrLinkStab();
 
    void SetLinkStability(Time linkStab)
    {
        m_linkStability = linkStab + Simulator::Now();
    }
 
    Time GetLinkStability() const
    {
        return m_linkStability - Simulator::Now();
    }
 
    void Print() const;
 
  private:
    Time m_linkStability;
};
 
class DsrNodeStab
{
  public:
    DsrNodeStab(Time nodeStab = Simulator::Now());
    virtual ~DsrNodeStab();
 
    void SetNodeStability(Time nodeStab)
    {
        m_nodeStability = nodeStab + Simulator::Now();
    }
 
    Time GetNodeStability() const
    {
        return m_nodeStability - Simulator::Now();
    }
 
  private:
    Time m_nodeStability; 
};
 
class DsrRouteCacheEntry
{
  public:
    typedef std::vector<Ipv4Address> IP_VECTOR;          
    typedef std::vector<Ipv4Address>::iterator Iterator; 
 
    DsrRouteCacheEntry(IP_VECTOR const& ip = IP_VECTOR(),
                       Ipv4Address dst = Ipv4Address(),
                       Time exp = Simulator::Now());
    virtual ~DsrRouteCacheEntry();
 
    void Invalidate(Time badLinkLifetime);
 
    // Fields
    void SetUnidirectional(bool u)
    {
        m_blackListState = u;
    }
 
    bool IsUnidirectional() const
    {
        return m_blackListState;
    }
 
    void SetBlacklistTimeout(Time t)
    {
        m_blackListTimeout = t;
    }
 
    Time GetBlacklistTimeout() const
    {
        return m_blackListTimeout;
    }
 
    Ipv4Address GetDestination() const
    {
        return m_dst;
    }
 
    void SetDestination(Ipv4Address d)
    {
        m_dst = d;
    }
 
    IP_VECTOR GetVector() const
    {
        return m_path;
    }
 
    void SetVector(IP_VECTOR v)
    {
        m_path = v;
    }
 
    void SetExpireTime(Time exp)
    {
        m_expire = exp + Simulator::Now();
    }
 
    Time GetExpireTime() const
    {
        return m_expire - Simulator::Now();
    }
 
    void Print(std::ostream& os) const;
 
    bool operator==(const DsrRouteCacheEntry& o) const
    {
        return m_path == o.m_path;
    }
 
  private:
    Timer m_ackTimer;             
    Ipv4Address m_dst;            
    IP_VECTOR m_path;             
    Time m_expire;                
    Ipv4InterfaceAddress m_iface; 
    uint8_t m_reqCount;           
    bool m_blackListState;        
    Time m_blackListTimeout;      
    Ptr<Ipv4Route> m_ipv4Route;   
    Ptr<Ipv4> m_ipv4;             
};
 
class DsrRouteCache : public Object
{
  public:
    static TypeId GetTypeId();
 
    DsrRouteCache();
    ~DsrRouteCache() override;
 
    // Delete assignment operator to avoid misuse
    DsrRouteCache& operator=(const DsrRouteCache&) = delete;
 
    void RemoveLastEntry(std::list<DsrRouteCacheEntry>& rtVector);
    typedef std::list<DsrRouteCacheEntry::IP_VECTOR> routeVector;
 
    // Fields
    bool GetSubRoute() const
    {
        return m_subRoute;
    }
 
    void SetSubRoute(bool subRoute)
    {
        m_subRoute = subRoute;
    }
 
    uint32_t GetMaxCacheLen() const
    {
        return m_maxCacheLen;
    }
 
    void SetMaxCacheLen(uint32_t len)
    {
        m_maxCacheLen = len;
    }
 
    Time GetCacheTimeout() const
    {
        return RouteCacheTimeout;
    }
 
    void SetCacheTimeout(Time t)
    {
        RouteCacheTimeout = t;
    }
 
    uint32_t GetMaxEntriesEachDst() const
    {
        return m_maxEntriesEachDst;
    }
 
    void SetMaxEntriesEachDst(uint32_t entries)
    {
        m_maxEntriesEachDst = entries;
    }
 
    Time GetBadLinkLifetime() const
    {
        return m_badLinkLifetime;
    }
 
    void SetBadLinkLifetime(Time t)
    {
        m_badLinkLifetime = t;
    }
 
    uint64_t GetStabilityDecrFactor() const
    {
        return m_stabilityDecrFactor;
    }
 
    void SetStabilityDecrFactor(uint64_t decrFactor)
    {
        m_stabilityDecrFactor = decrFactor;
    }
 
    uint64_t GetStabilityIncrFactor() const
    {
        return m_stabilityIncrFactor;
    }
 
    void SetStabilityIncrFactor(uint64_t incrFactor)
    {
        m_stabilityIncrFactor = incrFactor;
    }
 
    Time GetInitStability() const
    {
        return m_initStability;
    }
 
    void SetInitStability(Time initStability)
    {
        m_initStability = initStability;
    }
 
    Time GetMinLifeTime() const
    {
        return m_minLifeTime;
    }
 
    void SetMinLifeTime(Time minLifeTime)
    {
        m_minLifeTime = minLifeTime;
    }
 
    Time GetUseExtends() const
    {
        return m_useExtends;
    }
 
    void SetUseExtends(Time useExtends)
    {
        m_useExtends = useExtends;
    }
 
    bool UpdateRouteEntry(Ipv4Address dst);
    bool AddRoute(DsrRouteCacheEntry& rt);
    bool LookupRoute(Ipv4Address id, DsrRouteCacheEntry& rt);
    void PrintVector(std::vector<Ipv4Address>& vec);
    void PrintRouteVector(std::list<DsrRouteCacheEntry> route);
    bool FindSameRoute(DsrRouteCacheEntry& rt, std::list<DsrRouteCacheEntry>& rtVector);
    bool DeleteRoute(Ipv4Address dst);
    void DeleteAllRoutesIncludeLink(Ipv4Address errorSrc,
                                    Ipv4Address unreachNode,
                                    Ipv4Address node);
 
    void Clear()
    {
        m_routeEntryVector.erase(m_routeEntryVector.begin(), m_routeEntryVector.end());
    }
 
    void Purge();
    void Print(std::ostream& os);
 
    //------------------------------------------------------------------------------------------
    uint16_t CheckUniqueAckId(Ipv4Address nextHop);
    uint16_t GetAckSize();
 
    // --------------------------------------------------------------------------------------------
    struct Neighbor
    {
        Ipv4Address m_neighborAddress;  
        Mac48Address m_hardwareAddress; 
        Time m_expireTime;              
        bool close;                     
 
        Neighbor(Ipv4Address ip, Mac48Address mac, Time t)
            : m_neighborAddress(ip),
              m_hardwareAddress(mac),
              m_expireTime(t),
              close(false)
        {
        }
 
        Neighbor()
        {
        } // For Python bindings
    };
 
    Time GetExpireTime(Ipv4Address addr);
    bool IsNeighbor(Ipv4Address addr);
    void UpdateNeighbor(std::vector<Ipv4Address> nodeList, Time expire);
    void AddNeighbor(std::vector<Ipv4Address> nodeList, Ipv4Address ownAddress, Time expire);
    void PurgeMac();
    void ScheduleTimer();
 
    void ClearMac()
    {
        m_nb.clear();
    }
 
    void AddArpCache(Ptr<ArpCache> a);
    void DelArpCache(Ptr<ArpCache>);
 
    void SetCallback(Callback<void, Ipv4Address, uint8_t> cb)
    {
        m_handleLinkFailure = cb;
    }
 
    Callback<void, Ipv4Address, uint8_t> GetCallback() const
    {
        return m_handleLinkFailure;
    }
 
  private:
    DsrRouteCacheEntry::IP_VECTOR
        m_vector;           
    uint32_t m_maxCacheLen; 
    Time RouteCacheTimeout; 
    Time m_badLinkLifetime; 
    /*
     * Define the parameters for link cache type
     */
    uint32_t m_stabilityDecrFactor; 
    uint32_t m_stabilityIncrFactor; 
    Time m_initStability;           
    Time m_minLifeTime;             
    Time m_useExtends;              
    typedef std::list<DsrRouteCacheEntry> routeEntryVector;
 
    std::map<Ipv4Address, routeEntryVector>
        m_sortedRoutes; 
 
    routeEntryVector m_routeEntryVector; 
 
    uint32_t m_maxEntriesEachDst; 
 
    std::map<Ipv4Address, uint16_t> m_ackIdCache; 
 
    bool m_isLinkCache; 
 
    bool m_subRoute; 
#define MAXWEIGHT 0xFFFF;
    std::map<Ipv4Address, std::map<Ipv4Address, uint32_t>> m_netGraph;
 
    std::map<Ipv4Address, DsrRouteCacheEntry::IP_VECTOR>
        m_bestRoutesTable_link;                     
    std::map<Link, DsrLinkStab> m_linkCache;        
    std::map<Ipv4Address, DsrNodeStab> m_nodeCache; 
    bool LookupRoute_Link(Ipv4Address id, DsrRouteCacheEntry& rt);
    bool IncStability(Ipv4Address node);
    bool DecStability(Ipv4Address node);
 
  public:
    void SetCacheType(std::string type);
    bool IsLinkCache();
    bool AddRoute_Link(DsrRouteCacheEntry::IP_VECTOR nodelist, Ipv4Address node);
    void RebuildBestRouteTable(Ipv4Address source);
    void PurgeLinkNode();
    void UseExtends(DsrRouteCacheEntry::IP_VECTOR rt);
    void UpdateNetGraph();
    //---------------------------------------------------------------------------------------
    Callback<void, Ipv4Address, uint8_t> m_handleLinkFailure; 
 
    Timer m_ntimer; 
 
    std::vector<Neighbor> m_nb; 
 
    std::vector<Ptr<ArpCache>>
        m_arp; 
 
    Time m_delay; 
 
    Mac48Address LookupMacAddress(Ipv4Address addr);
 
    void ProcessTxError(const WifiMacHeader& hdr);
};
} // namespace dsr
} // namespace ns3
#endif /* DSR_RCACHE_H */