/* -*- 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_OPTION_H
#define DSR_OPTION_H

#include <map>
#include <list>

#include "ns3/buffer.h"
#include "ns3/packet.h"
#include "ns3/callback.h"
#include "ns3/ptr.h"
#include "ns3/udp-l4-protocol.h"
#include "ns3/ipv4.h"
#include "ns3/ipv4-route.h"
#include "ns3/object.h"
#include "ns3/node.h"
#include "ns3/ipv4-interface.h"
#include "ns3/ipv4-header.h"
#include "ns3/ipv4-address.h"
#include "ns3/traced-callback.h"
#include "ns3/output-stream-wrapper.h"
#include "ns3/timer.h"

#include "dsr-rsendbuff.h"
#include "dsr-maintain-buff.h"
#include "dsr-option-header.h"
#include "dsr-rcache.h"
#include "dsr-routing.h"
#include "dsr-gratuitous-reply-table.h"

namespace ns3 {

class Packet;
class NetDevice;
class Node;
class Ipv4Address;
class Ipv4Interface;
class Ipv4Route;
class Ipv4;
class Time;

namespace dsr {

class DsrOptions : public Object
{
public:
  /**
   * \brief Get the type identificator.
   * \return type identificator
   */
  static TypeId GetTypeId (void);
  /**
   * \brief Constructor.
   */
  DsrOptions ();
  /**
   * \brief Destructor.
   */
  virtual ~DsrOptions ();
  /**
    * \brief Get the option number.
    * \return option number
    */
  virtual uint8_t GetOptionNumber () const = 0;
  /**
   * \brief Set the node.
   * \param node the node to set
   */
  void SetNode (Ptr<Node> node);
  /**
   * \brief Get the node.
   * \return the node
   */
  Ptr<Node> GetNode () const;
  /**
   * \brief Search for the ipv4 address in the node list.
   *
   * \param ipv4Address IPv4 address to search for
   * \param destAddress IPv4 address in the list that we begin the search
   * \param nodeList List of IPv4 addresses
   * \return true if contain ip address
   */
  bool ContainAddressAfter (Ipv4Address ipv4Address, Ipv4Address destAddress, std::vector<Ipv4Address> &nodeList);
  /**
   * \brief Cut the route from ipv4Address to the end of the route vector
   *
   * \param ipv4Address the address to begin cutting
   * \param nodeList List of IPv4 addresses
   * \return the vector after the route cut
   */
  std::vector<Ipv4Address> CutRoute (Ipv4Address ipv4Address, std::vector<Ipv4Address> &nodeList);
  /**
   * \brief Set the route to use for data packets,
   *        used by the option headers when sending data/control packets
   *
   * \param nextHop IPv4 address of the next hop
   * \param srcAddress IPv4 address of the source
   * \return the route
   */
  virtual Ptr<Ipv4Route> SetRoute (Ipv4Address nextHop, Ipv4Address srcAddress);
  /**
   * \brief Reverse the routes.
   *
   * \param vec List of IPv4 addresses
   * \return true if successfully reversed
   */
  bool ReverseRoutes  (std::vector<Ipv4Address>& vec);
  /**
   * \brief Search for the next hop in the route
   *
   * \param ipv4Address the IPv4 address of the node we are looking for its next hop address
   * \param vec List of IPv4 addresses
   * \return the next hop address if found
   */
  Ipv4Address SearchNextHop (Ipv4Address ipv4Address, std::vector<Ipv4Address>& vec);
  /**
   * \brief Reverse search for the next hop in the route
   *
   * \param ipv4Address the IPv4 address of the node we are looking for its next hop address
   * \param vec List of IPv4 addresses
   * \return the previous next hop address if found
   */
  Ipv4Address ReverseSearchNextHop (Ipv4Address ipv4Address, std::vector<Ipv4Address>& vec);
  /**
   * \brief Reverse search for the next two hop in the route
   *
   * \param ipv4Address the IPv4 address of the node we are looking for its next two hop address
   * \param vec List of IPv4 addresses
   * \return the previous next two hop address if found
   */
  Ipv4Address ReverseSearchNextTwoHop  (Ipv4Address ipv4Address, std::vector<Ipv4Address>& vec);
  /**
   * \brief Print out the elements in the route vector
   */
  void PrintVector (std::vector<Ipv4Address>& vec);
  /**
   * \brief Check if the two vectors contain duplicate or not
   *
   * \param vec the first list of IPv4 addresses
   * \param vec2 the second list of IPv4 addresses
   * \return true if contains duplicate
   */
  bool IfDuplicates (std::vector<Ipv4Address>& vec, std::vector<Ipv4Address>& vec2);
  /**
   * \brief Check if the route already contains the node ip address
   *
   * \param ipv4Address the IPv4 address that we are looking for
   * \param vec List of IPv4 addresses
   * \return true if it already exists
   */
  bool CheckDuplicates (Ipv4Address ipv4Address, std::vector<Ipv4Address>& vec);
  /**
   * \brief Remove the duplicates from the route
   *
   * \param vec List of IPv4 addresses to be clean
   * \return the route after route shorten
   */
  void RemoveDuplicates (std::vector<Ipv4Address>& vec);
  /**
   * \brief Schedule the intermediate node route request broadcast
   * \param packet the original packet
   * \param nodeList The list of IPv4 addresses
   * \param source address
   * \param destination address
   */
  void ScheduleReply (Ptr<Packet> &packet, std::vector<Ipv4Address> &nodeList, Ipv4Address &source, Ipv4Address &destination);
  /**
   * \brief Get the node id with Ipv4Address
   *
   * \param address IPv4 address to look for ID
   * \return the id of the node
   */
  uint32_t GetIDfromIP (Ipv4Address address);
  /**
   * \brief Get the node object with Ipv4Address
   *
   * \param ipv4Address IPv4 address of the node
   * \return the object of the node
   */
  Ptr<Node> GetNodeWithAddress (Ipv4Address ipv4Address);
  /**
   * \brief Process method
   *
   * Called from DsrRouting::Receive.
   * \param packet the packet
   * \param dsrP  the clean packet with payload
   * \param ipv4Address the IPv4 address
   * \param source IPv4 address of the source
   * \param ipv4Header the IPv4 header of packet received
   * \param protocol the protocol number of the up layer
   * \param isPromisc if the packet must be dropped
   * \param promiscSource IPv4 address
   * \return the processed size
   */
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource) = 0;

protected:
  /**
   * \brief Drop trace callback.
   */
  TracedCallback<Ptr<const Packet> > m_dropTrace;
  /**
   * \brief The broadcast IP address.
   */
  Ipv4Address Broadcast;
  /**
   * \brief The route request table.
   */
  Ptr<dsr::RreqTable> m_rreqTable;
  /**
   * \brief The route cache table.
   */
  Ptr<dsr::RouteCache> m_routeCache;
  /**
   * \brief The ipv4 route.
   */
  Ptr<Ipv4Route> m_ipv4Route;
  /**
   * \brief The ipv4.
   */
  Ptr<Ipv4> m_ipv4;
  /**
   * \brief The vector of Ipv4 address.
   */
  std::vector<Ipv4Address> m_ipv4Address;
  /**
   * \brief The vector of final Ipv4 address.
   */
  std::vector<Ipv4Address> m_finalRoute;
  /**
   * \brief The active route timeout value.
   */
  Time ActiveRouteTimeout;
  /**
   * The receive trace back, only triggered when final destination receive data packet
   */
  TracedCallback <const DsrOptionSRHeader &> m_rxPacketTrace;

private:
  Ptr<Node> m_node;
};

/**
 * \class DsrOptionPad1
 * \brief Dsr Option Pad1
 */
class DsrOptionPad1 : public DsrOptions
{
public:
  /**
   * \brief Pad1 option number.
   */
  static const uint8_t OPT_NUMBER = 224;

  static TypeId GetTypeId ();

  DsrOptionPad1 ();
  virtual ~DsrOptionPad1 ();

  virtual uint8_t GetOptionNumber () const;
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource);
};

/**
 * \class DsrOptionPadn
 * \brief IPv4 Option Padn
 */
class DsrOptionPadn : public DsrOptions
{
public:
  /**
   * \brief PadN option number.
   */
  static const uint8_t OPT_NUMBER = 0;

  static TypeId GetTypeId ();

  DsrOptionPadn ();
  virtual ~DsrOptionPadn ();

  virtual uint8_t GetOptionNumber () const;
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource);
};

/**
 * \class DsrOptionRreq
 * \brief Dsr Option Rreq
 */
class DsrOptionRreq : public DsrOptions
{
public:
  /**
   * \brief Rreq option number.
   */
  static const uint8_t OPT_NUMBER = 1;

  static TypeId GetTypeId ();
  /**
   * \brief Get the instance type ID.
   * \return instance type ID
   */
  virtual TypeId GetInstanceTypeId () const;
  /**
   * \brief Constructor.
   */
  DsrOptionRreq ();
  /**
   * \brief Destructor.
   */
  virtual ~DsrOptionRreq ();

  virtual uint8_t GetOptionNumber () const;
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource);

private:
  /**
   * \brief The route cache.
   */
  Ptr<dsr::RouteCache> m_routeCache;
  /**
   * \brief The ipv4.
   */
  Ptr<Ipv4> m_ipv4;
};

/**
 * \class DsrOptionRrep
 * \brief Dsr Option Route Reply
 */
class DsrOptionRrep : public DsrOptions
{
public:
  /**
   * \brief Router alert option number.
   */
  static const uint8_t OPT_NUMBER = 2;

  static TypeId GetTypeId ();
  /**
   * \brief Get the instance type ID.
   * \return instance type ID
   */
  virtual TypeId GetInstanceTypeId () const;

  DsrOptionRrep ();
  virtual ~DsrOptionRrep ();

  virtual uint8_t GetOptionNumber () const;
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource);

private:
  /**
   * \brief The route cache.
   */
  Ptr<dsr::RouteCache> m_routeCache;
  /**
   * \brief The ip layer 3.
   */
  Ptr<Ipv4> m_ipv4;
};

/**
 * \class DsrOptionSR
 * \brief Dsr Option Source Route
 */
class DsrOptionSR : public DsrOptions
{
public:
  /**
   * \brief Source Route option number.
   */
  static const uint8_t OPT_NUMBER = 96;

  static TypeId GetTypeId ();
  /**
   * \brief Get the instance type ID.
   * \return instance type ID
   */
  virtual TypeId GetInstanceTypeId () const;

  DsrOptionSR ();
  virtual ~DsrOptionSR ();

  virtual uint8_t GetOptionNumber () const;
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource);

private:
  /**
   * \brief The ip layer 3.
   */
  Ptr<Ipv4> m_ipv4;
};

/**
 * \class DsrOptionRerr
 * \brief Dsr Option Route Error
 */
class DsrOptionRerr : public DsrOptions
{
public:
  /**
   * \brief Dsr Route Error option number.
   */
  static const uint8_t OPT_NUMBER = 3;

  static TypeId GetTypeId ();
  /**
   * \brief Get the instance type ID.
   * \return instance type ID
   */
  virtual TypeId GetInstanceTypeId () const;

  DsrOptionRerr ();
  virtual ~DsrOptionRerr ();

  virtual uint8_t GetOptionNumber () const;
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource);
  /**
   * \brief Do Send error message
   *
   * \param p the packet
   * \param rerr  the DsrOptionRerrUnreachHeader header
   * \param rerrSize the route error header size
   * \param ipv4Address ipv4 address of our own
   * \param protocol the protocol number of the up layer
   * \return the processed size
   */
  uint8_t DoSendError (Ptr<Packet> p, DsrOptionRerrUnreachHeader &rerr, uint32_t rerrSize, Ipv4Address ipv4Address, uint8_t protocol);

private:
  /**
   * \brief The route cache.
   */
  Ptr<dsr::RouteCache> m_routeCache;
  /**
   * \brief The ipv4 layer 3.
   */
  Ptr<Ipv4> m_ipv4;
};

/**
 * \class DsrOptionAckReq
 * \brief Dsr Option
 */
class DsrOptionAckReq : public DsrOptions
{
public:
  /**
   * \brief Dsr ack request option number.
   */
  static const uint8_t OPT_NUMBER = 160;

  static TypeId GetTypeId ();
  /**
   * \brief Get the instance type ID.
   * \return instance type ID
   */
  virtual TypeId GetInstanceTypeId () const;

  DsrOptionAckReq ();
  virtual ~DsrOptionAckReq ();

  virtual uint8_t GetOptionNumber () const;
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource);

private:
  /**
   * \brief The route cache.
   */
  Ptr<dsr::RouteCache> m_routeCache;
  /**
   * \brief The ipv4 layer 3.
   */
  Ptr<Ipv4> m_ipv4;
};

/**
 * \class DsrOptionAck
 * \brief Dsr Option Ack
 */
class DsrOptionAck : public DsrOptions
{
public:
  /**
   * \brief The Dsr Ack option number.
   */
  static const uint8_t OPT_NUMBER = 32;

  static TypeId GetTypeId ();
  /**
   * \brief Get the instance type ID.
   * \return instance type ID
   */
  virtual TypeId GetInstanceTypeId () const;

  DsrOptionAck ();
  virtual ~DsrOptionAck ();

  virtual uint8_t GetOptionNumber () const;
  virtual uint8_t Process (Ptr<Packet> packet, Ptr<Packet> dsrP, Ipv4Address ipv4Address, Ipv4Address source, Ipv4Header const& ipv4Header, uint8_t protocol, bool& isPromisc, Ipv4Address promiscSource);

private:
  /**
   * \brief The route cache.
   */
  Ptr<dsr::RouteCache> m_routeCache;
  /**
   * \brief The ipv4 layer 3.
   */
  Ptr<Ipv4> m_ipv4;
};
} // namespace dsr
} // Namespace ns3

#endif
