dsr-rcache.h

Go to the documentation of this file.

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * 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  http://wiki.ittc.ku.edu/resilinets
 * 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 <map>
#include <stdint.h>
#include <cassert>
#include <sys/types.h>
#include <iostream>
#include <vector>

#include "ns3/simulator.h"
#include "ns3/timer.h"
#include "ns3/simple-ref-count.h"
#include "ns3/header.h"
#include "ns3/enum.h"
#include "ns3/ipv4-address.h"
#include "ns3/nstime.h"
#include "ns3/ipv4.h"
#include "ns3/ipv4-route.h"
#include "ns3/net-device.h"
#include "ns3/ipv4-l3-protocol.h"
#include "ns3/callback.h"
#include "ns3/wifi-mac-header.h"
#include "ns3/arp-cache.h"
#include "dsr-option-header.h"

namespace ns3 {
class Time;
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 < (Link const& 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== (DsrRouteCacheEntry const & o) const
  {
    if (m_path.size () != o.m_path.size ())
      {
        NS_ASSERT (false);
        return false;
      }
    IP_VECTOR::const_iterator j = o.m_path.begin ();
    for (IP_VECTOR::const_iterator i = m_path.begin (); i
         != m_path.end (); i++, j++)
      {
        /*
         * Verify if neither the entry are not 0 and they equal to each other
         */
        if (((*i) == 0) || ((*j) == 0))
          {
            return false;
          }
        else if (!((*i) == (*j)) )
          {
            return false;
          }
        else
          {
            return true;
          }
      }
    return false;
  }
  // \}

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 ();
  virtual ~DsrRouteCache ();

  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>);
  void DelArpCache (Ptr<ArpCache>);
  Callback<void, WifiMacHeader const &> GetTxErrorCallback () const
  {
    return m_txErrorCallback;
  }

  void SetCallback (Callback<void, Ipv4Address, uint8_t > cb)
  {
    m_handleLinkFailure = cb;
  }
  Callback<void, Ipv4Address, uint8_t > GetCallback () const
  {
    return m_handleLinkFailure;
  }

private:
  DsrRouteCache & operator= (DsrRouteCache const &);
  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;            

  Callback<void, WifiMacHeader const &> m_txErrorCallback;              

  Timer m_ntimer;                                                       

  std::vector<Neighbor> m_nb;                                           

  std::vector<Ptr<ArpCache> > m_arp;                                    

  Time m_delay;                                                         

  Mac48Address LookupMacAddress (Ipv4Address addr);

  void ProcessTxError (WifiMacHeader const &hdr);
};
} // namespace dsr
} // namespace ns3
#endif /* DSR_RCACHE_H */