dsr-routing.h

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/* -*- 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>
 *
 * 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_ROUTING_H
#define DSR_ROUTING_H

#include <map>
#include <list>
#include <vector>
#include <stdint.h>
#include <cassert>
#include <sys/types.h>

#include "ns3/callback.h"
#include "ns3/object.h"
#include "ns3/node.h"
#include "ns3/ptr.h"
#include "ns3/buffer.h"
#include "ns3/packet.h"
#include "ns3/ipv4.h"
#include "ns3/ip-l4-protocol.h"
#include "ns3/ipv4-l3-protocol.h"
#include "ns3/icmpv4-l4-protocol.h"
#include "ns3/ipv4-interface.h"
#include "ns3/ipv4-header.h"
#include "ns3/ipv4-address.h"
#include "ns3/traced-callback.h"
#include "ns3/random-variable-stream.h"
#include "ns3/ipv4-route.h"
#include "ns3/timer.h"
#include "ns3/net-device.h"
#include "ns3/output-stream-wrapper.h"
#include "ns3/wifi-mac.h"
#include "ns3/socket.h"
#include "ns3/event-garbage-collector.h"
#include "ns3/test.h"

#include "dsr-network-queue.h"
#include "dsr-rcache.h"
#include "dsr-rreq-table.h"
#include "dsr-maintain-buff.h"
#include "dsr-passive-buff.h"
#include "dsr-option-header.h"
#include "dsr-fs-header.h"
#include "dsr-rsendbuff.h"
#include "dsr-errorbuff.h"
#include "dsr-gratuitous-reply-table.h"

namespace ns3 {

class Packet;
class Node;
class Ipv4;
class Ipv4Address;
class Ipv4Header;
class Ipv4Interface;
class Ipv4L3Protocol;
class Time;

namespace dsr {

class DsrOptions;
class DsrRouting : public IpL4Protocol
{
public:
  static TypeId GetTypeId ();
  static const uint8_t PROT_NUMBER;
  DsrRouting ();
  virtual ~DsrRouting ();
  Ptr<Node> GetNode () const;
  void SetNode (Ptr<Node> node);
  void SetRouteCache (Ptr<dsr::DsrRouteCache> r);
  Ptr<dsr::DsrRouteCache> GetRouteCache () const;
  void SetRequestTable (Ptr<dsr::DsrRreqTable> r);
  Ptr<dsr::DsrRreqTable> GetRequestTable () const;
  void SetPassiveBuffer (Ptr<dsr::DsrPassiveBuffer> r);
  Ptr<dsr::DsrPassiveBuffer> GetPassiveBuffer () const;

  //\{
  bool IsLinkCache ();
  void UseExtends (DsrRouteCacheEntry::IP_VECTOR rt);
  bool LookupRoute (Ipv4Address id, DsrRouteCacheEntry & rt);
  bool AddRoute_Link (DsrRouteCacheEntry::IP_VECTOR nodelist, Ipv4Address source);
  bool AddRoute (DsrRouteCacheEntry & rt);
  void DeleteAllRoutesIncludeLink (Ipv4Address errorSrc, Ipv4Address unreachNode, Ipv4Address node);
  bool UpdateRouteEntry (Ipv4Address dst);
  bool FindSourceEntry (Ipv4Address src, Ipv4Address dst, uint16_t id);
  //\}

  Ptr<NetDevice> GetNetDeviceFromContext (std::string context);
  std::vector<std::string> GetElementsFromContext (std::string context);
  uint16_t GetIDfromIP (Ipv4Address address);
  Ipv4Address GetIPfromID (uint16_t id);
  Ipv4Address GetIPfromMAC (Mac48Address address);
  Ptr<Node> GetNodeWithAddress (Ipv4Address ipv4Address);
  void PrintVector (std::vector<Ipv4Address>& vec);
  Ipv4Address SearchNextHop (Ipv4Address ipv4Address, std::vector<Ipv4Address>& vec);
  int GetProtocolNumber (void) const;
  void SendBuffTimerExpire ();
  void CheckSendBuffer ();
  void PacketNewRoute (Ptr<Packet> packet,
                       Ipv4Address source,
                       Ipv4Address destination,
                       uint8_t protocol);
  Ptr<Ipv4Route> SetRoute (Ipv4Address nextHop, Ipv4Address srcAddress);
  uint32_t GetPriority (DsrMessageType messageType);
  void SendUnreachError (Ipv4Address unreachNode, Ipv4Address destination, Ipv4Address originalDst, uint8_t salvage, uint8_t protocol);  
  void ForwardErrPacket (DsrOptionRerrUnreachHeader &rerr,
                         DsrOptionSRHeader &sourceRoute,
                         Ipv4Address nextHop,
                         uint8_t protocol,
                         Ptr<Ipv4Route> route);
  void Send (Ptr<Packet> packet, Ipv4Address source,
             Ipv4Address destination, uint8_t protocol, Ptr<Ipv4Route> route);
  uint16_t AddAckReqHeader (Ptr<Packet> &packet, Ipv4Address nextHop);
  void SendPacket (Ptr<Packet> packet, Ipv4Address source, Ipv4Address nextHop, uint8_t protocol);
  void Scheduler (uint32_t priority);
  void PriorityScheduler (uint32_t priority, bool continueWithFirst);
  void IncreaseRetransTimer ();
  bool SendRealDown (DsrNetworkQueueEntry & newEntry);
  void SendPacketFromBuffer (DsrOptionSRHeader const &sourceRoute,
                             Ipv4Address nextHop,
                             uint8_t protocol);
  bool PassiveEntryCheck (Ptr<Packet> packet, Ipv4Address source, Ipv4Address destination, uint8_t segsLeft,
                          uint16_t fragmentOffset, uint16_t identification, bool saveEntry);

  void CancelPacketAllTimer (DsrMaintainBuffEntry & mb);
  bool CancelPassiveTimer (Ptr<Packet> packet, Ipv4Address source, Ipv4Address destination, uint8_t segsLeft);
  void CallCancelPacketTimer (uint16_t ackId, Ipv4Header const& ipv4Header, Ipv4Address realSrc, Ipv4Address realDst);
  void CancelNetworkPacketTimer (DsrMaintainBuffEntry & mb);
  void CancelPassivePacketTimer (DsrMaintainBuffEntry & mb);
  void CancelLinkPacketTimer (DsrMaintainBuffEntry & mb);
  void CancelPacketTimerNextHop (Ipv4Address nextHop, uint8_t protocol);
  void SalvagePacket (Ptr<const Packet> packet, Ipv4Address source, Ipv4Address dst, uint8_t protocol);
  void ScheduleLinkPacketRetry   (DsrMaintainBuffEntry & mb,
                                  uint8_t protocol);
  void SchedulePassivePacketRetry   (DsrMaintainBuffEntry & mb,
                                     uint8_t protocol);
  void ScheduleNetworkPacketRetry   (DsrMaintainBuffEntry & mb,
                                     bool isFirst,
                                     uint8_t protocol);
  void LinkScheduleTimerExpire  (DsrMaintainBuffEntry & mb,
                                 uint8_t protocol);
  void NetworkScheduleTimerExpire  (DsrMaintainBuffEntry & mb,
                                    uint8_t protocol);
  void PassiveScheduleTimerExpire  (DsrMaintainBuffEntry & mb,
                                    uint8_t protocol);
  void ForwardPacket (Ptr<const Packet> packet,
                      DsrOptionSRHeader &sourceRoute,
                      Ipv4Header const& ipv4Header,
                      Ipv4Address source,
                      Ipv4Address destination,
                      Ipv4Address targetAddress,
                      uint8_t protocol,
                      Ptr<Ipv4Route> route);
  void SendInitialRequest (Ipv4Address source,
                           Ipv4Address destination,
                           uint8_t protocol);
  void SendErrorRequest (DsrOptionRerrUnreachHeader &rerr, uint8_t protocol);
  void SendRequest (Ptr<Packet> packet,
                    Ipv4Address source);
  void ScheduleInterRequest (Ptr<Packet> packet);
  void SendGratuitousReply (Ipv4Address replyTo,
                            Ipv4Address replyFrom,
                            std::vector<Ipv4Address> &nodeList,
                            uint8_t protocol);
  void SendReply (Ptr<Packet> packet,
                  Ipv4Address source,
                  Ipv4Address nextHop,
                  Ptr<Ipv4Route> route);
  void ScheduleInitialReply (Ptr<Packet> packet,
                             Ipv4Address source,
                             Ipv4Address nextHop,
                             Ptr<Ipv4Route> route);
  void ScheduleCachedReply (Ptr<Packet> packet,
                            Ipv4Address source,
                            Ipv4Address destination,
                            Ptr<Ipv4Route> route,
                            double hops);
  void SendAck   (uint16_t ackId,
                  Ipv4Address destination,
                  Ipv4Address realSrc,
                  Ipv4Address realDst,
                  uint8_t protocol,
                  Ptr<Ipv4Route> route);
  virtual enum IpL4Protocol::RxStatus Receive (Ptr<Packet> p,
                                               Ipv4Header const &header,
                                               Ptr<Ipv4Interface> incomingInterface);

  virtual enum IpL4Protocol::RxStatus Receive (Ptr<Packet> p,
                                               Ipv6Header const &header,
                                               Ptr<Ipv6Interface> incomingInterface);

  void SetDownTarget (IpL4Protocol::DownTargetCallback callback);
  void SetDownTarget6 (IpL4Protocol::DownTargetCallback6 callback);
  IpL4Protocol::DownTargetCallback GetDownTarget (void) const;
  IpL4Protocol::DownTargetCallback6 GetDownTarget6 (void) const;
  uint8_t Process (Ptr<Packet>& packet, Ipv4Header const& ipv4Header, Ipv4Address dst, uint8_t *nextHeader, uint8_t protocol, bool& isDropped);
  void Insert (Ptr<dsr::DsrOptions> option);
  Ptr<dsr::DsrOptions> GetOption (int optionNumber);
  void CancelRreqTimer (Ipv4Address dst, bool isRemove);
  void ScheduleRreqRetry (Ptr<Packet> packet, std::vector<Ipv4Address> address, bool nonProp, uint32_t requestId, uint8_t protocol);
  void RouteRequestTimerExpire (Ptr<Packet> packet, std::vector<Ipv4Address> address, uint32_t requestId, uint8_t protocol);

  int64_t AssignStreams (int64_t stream);

protected:
  /*
 *    * This function will notify other components connected to the node that a new stack member is now connected
 *       * This will be used to notify Layer 3 protocol of layer 4 protocol stack to connect them together.
 *          */
  virtual void NotifyNewAggregate ();
  virtual void DoDispose (void);
  TracedCallback<Ptr<const Packet> > m_dropTrace; 
  TracedCallback <const DsrOptionSRHeader &> m_txPacketTrace; 

private:
  void Start ();
  void SendRerrWhenBreaksLinkToNextHop (Ipv4Address nextHop, uint8_t protocol);
  bool PromiscReceive (Ptr<NetDevice> device, Ptr<const Packet> packet, uint16_t protocol, const Address &from,
                       const Address &to, NetDevice::PacketType packetType);
  typedef std::list<Ptr<DsrOptions> > DsrOptionList_t;
  DsrOptionList_t m_options;

  Ptr<Ipv4L3Protocol> m_ipv4;                           

  Ptr<Ipv4Route> m_ipv4Route;                           

  Ptr<Ipv4> m_ip;                                       

  Ptr<Node> m_node;                                     

  Ipv4Address m_mainAddress;                            

  uint8_t segsLeft;                                     

  IpL4Protocol::DownTargetCallback m_downTarget;        

  uint32_t m_maxNetworkSize;                            

  Time m_maxNetworkDelay;                               

  uint32_t m_discoveryHopLimit;                         

  uint8_t m_maxSalvageCount;                            

  Time  m_requestPeriod;                                

  Time m_nonpropRequestTimeout;                         

  uint32_t m_sendRetries;                               

  uint32_t m_passiveRetries;                            

  uint32_t m_linkRetries;                               

  uint32_t m_rreqRetries;                               

  uint32_t m_maxMaintRexmt;                             

  Time m_nodeTraversalTime;                             

  uint32_t m_maxSendBuffLen;                            

  Time  m_sendBufferTimeout;                            

  DsrSendBuffer m_sendBuffer;                           

  DsrErrorBuffer m_errorBuffer;                         

  uint32_t  m_maxMaintainLen;                           

  Time     m_maxMaintainTime;                           

  uint32_t m_maxCacheLen;                               

  Time   m_maxCacheTime;                                

  Time  m_maxRreqTime;                                  

  uint32_t  m_maxEntriesEachDst;                        

  DsrMaintainBuffer m_maintainBuffer;                   

  uint32_t m_requestId;                                 

  uint16_t m_ackId;                                     

  uint32_t m_requestTableSize;                          

  uint32_t m_requestTableIds;                           

  uint32_t m_maxRreqId;                                 

  Time  m_blacklistTimeout;                             

  Ipv4Address m_broadcast;                              

  uint32_t m_broadcastJitter;                           

  Time  m_passiveAckTimeout;                            

  uint32_t m_tryPassiveAcks;                            

  Time  m_linkAckTimeout;                               

  uint32_t m_tryLinkAcks;                               

  Timer m_sendBuffTimer;                                

  Time m_sendBuffInterval;                              

  Time  m_gratReplyHoldoff;                             

  Time m_maxRequestPeriod;                              

  uint32_t m_graReplyTableSize;                         

  std::string m_cacheType;                              

  std::string m_routeSortType;                          

  uint32_t m_stabilityDecrFactor;                       

  uint32_t m_stabilityIncrFactor;                       

  Time m_initStability;                                 

  Time m_minLifeTime;                                   

  Time m_useExtends;                                    

  bool m_subRoute;                                      

  Time m_retransIncr;                                   

  std::vector<Ipv4Address> m_finalRoute;                

  std::map<Ipv4Address, Timer> m_addressReqTimer;       

  std::map<Ipv4Address, Timer> m_nonPropReqTimer;       

  std::map<NetworkKey, Timer>  m_addressForwardTimer;   

  std::map<NetworkKey, uint32_t> m_addressForwardCnt;   

  std::map<PassiveKey, uint32_t> m_passiveCnt;          

  std::map<PassiveKey, Timer> m_passiveAckTimer;        

  std::map<LinkKey, uint32_t> m_linkCnt;                

  std::map<LinkKey, Timer> m_linkAckTimer;              

  Ptr<dsr::DsrRouteCache> m_routeCache;                 

  Ptr<dsr::DsrRreqTable> m_rreqTable;                   

  Ptr<dsr::DsrPassiveBuffer> m_passiveBuffer;           

  uint32_t m_numPriorityQueues;                         

  bool m_linkAck;                                       

  std::map<uint32_t, Ptr<dsr::DsrNetworkQueue> > m_priorityQueue;   

  DsrGraReply m_graReply;                               

  DsrNetworkQueue m_networkQueue;                       

  std::vector<Ipv4Address> m_clearList;                 

  std::vector<Ipv4Address> m_addresses;                 

  std::map <std::string, uint32_t> m_macToNodeIdMap;    

  Ptr<UniformRandomVariable> m_uniformRandomVariable;    
};
}  /* namespace dsr */
}  /* namespace ns3 */

#endif /* DSR_ROUTING_H */