/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2005 INRIA

 *

 * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#ifndef IPV4_ROUTING_TABLE_ENTRY_H

#define IPV4_ROUTING_TABLE_ENTRY_H

#include <list>

#include <vector>

#include <ostream>

#include "ns3/ipv4-address.h"

namespace ns3 {

/**

 * \ingroup internet

 *

 * A record of an IPv4 routing table entry for Ipv4GlobalRouting and 

 * Ipv4StaticRouting.  This is not a reference counted object.

 */

class Ipv4RoutingTableEntry {

public:

  /**

   * \brief This constructor does nothing

   */

  Ipv4RoutingTableEntry ();

  /**

   * \brief Copy Constructor

   * \param route The route to copy

   */

  Ipv4RoutingTableEntry (Ipv4RoutingTableEntry const &route);

  /**

   * \brief Copy Constructor

   * \param route The route to copy

   */

  Ipv4RoutingTableEntry (Ipv4RoutingTableEntry const *route);

  /**

   * \return True if this route is a host route (mask of all ones); false otherwise

   */

  bool IsHost (void) const;

  /**

   * \return True if this route is not a host route (mask is not all ones); false otherwise

   *

   * This method is implemented as !IsHost ().

   */

  bool IsNetwork (void) const;

  /**

   * \return True if this route is a default route; false otherwise

   */

  bool IsDefault (void) const;

  /**

   * \return True if this route is a gateway route; false otherwise

   */

  bool IsGateway (void) const;

  /**

   * \return address of the gateway stored in this entry

   */

  Ipv4Address GetGateway (void) const;

  /**

   * \return The IPv4 address of the destination of this route

   */

  Ipv4Address GetDest (void) const;

  /**

   * \return The IPv4 network number of the destination of this route

   */

  Ipv4Address GetDestNetwork (void) const;

  /**

   * \return The IPv4 network mask of the destination of this route

   */

  Ipv4Mask GetDestNetworkMask (void) const;

  /**

   * \return The Ipv4 interface number used for sending outgoing packets

   */

  uint32_t GetInterface (void) const;

  /**

   * \return An Ipv4RoutingTableEntry object corresponding to the input parameters.

   * \param dest Ipv4Address of the destination

   * \param nextHop Ipv4Address of the next hop

   * \param interface Outgoing interface 

   */

  static Ipv4RoutingTableEntry CreateHostRouteTo (Ipv4Address dest, 

                                                  Ipv4Address nextHop,

                                                  uint32_t interface);

  /**

   * \return An Ipv4RoutingTableEntry object corresponding to the input parameters.

   * \param dest Ipv4Address of the destination

   * \param interface Outgoing interface 

   */

  static Ipv4RoutingTableEntry CreateHostRouteTo (Ipv4Address dest, 

                                                  uint32_t interface);

  /**

   * \return An Ipv4RoutingTableEntry object corresponding to the input parameters.

   * \param network Ipv4Address of the destination network

   * \param networkMask Ipv4Mask of the destination network mask

   * \param nextHop Ipv4Address of the next hop

   * \param interface Outgoing interface 

   */

  static Ipv4RoutingTableEntry CreateNetworkRouteTo (Ipv4Address network, 

                                                     Ipv4Mask networkMask,

                                                     Ipv4Address nextHop,

                                                     uint32_t interface);

  /**

   * \return An Ipv4RoutingTableEntry object corresponding to the input parameters.

   * \param network Ipv4Address of the destination network

   * \param networkMask Ipv4Mask of the destination network mask

   * \param interface Outgoing interface 

   */

  static Ipv4RoutingTableEntry CreateNetworkRouteTo (Ipv4Address network, 

                                                     Ipv4Mask networkMask,

                                                     uint32_t interface);

  /**

   * \return An Ipv4RoutingTableEntry object corresponding to the input 

   * parameters.  This route is distinguished; it will match any 

   * destination for which a more specific route does not exist.

   * \param nextHop Ipv4Address of the next hop

   * \param interface Outgoing interface 

   */

  static Ipv4RoutingTableEntry CreateDefaultRoute (Ipv4Address nextHop, 

                                                   uint32_t interface);

private:

  Ipv4RoutingTableEntry (Ipv4Address network,

                         Ipv4Mask mask,

                         Ipv4Address gateway,

                         uint32_t interface);

  Ipv4RoutingTableEntry (Ipv4Address dest,

                         Ipv4Mask mask,

                         uint32_t interface);

  Ipv4RoutingTableEntry (Ipv4Address dest,

                         Ipv4Address gateway,

                         uint32_t interface);

  Ipv4RoutingTableEntry (Ipv4Address dest,

                         uint32_t interface);

  Ipv4Address m_dest;

  Ipv4Mask m_destNetworkMask;

  Ipv4Address m_gateway;

  uint32_t m_interface;

};

std::ostream& operator<< (std::ostream& os, Ipv4RoutingTableEntry const& route);

/**

 * \ingroup internet

 *

 * \brief A record of an IPv4 multicast route for Ipv4GlobalRouting and Ipv4StaticRouting

 */

class Ipv4MulticastRoutingTableEntry {

public:

  /**

   * \brief This constructor does nothing

   */

  Ipv4MulticastRoutingTableEntry ();

  /**

   * \brief Copy Constructor

   * \param route The route to copy

   */

  Ipv4MulticastRoutingTableEntry (Ipv4MulticastRoutingTableEntry const &route);

  /**

   * \brief Copy Constructor

   * \param route The route to copy

   */

  Ipv4MulticastRoutingTableEntry (Ipv4MulticastRoutingTableEntry const *route);

  /**

   * \return The IPv4 address of the source of this route

   */

  Ipv4Address GetOrigin (void) const;

  /**

   * \return The IPv4 address of the multicast group of this route

   */

  Ipv4Address GetGroup (void) const;

  /**

   * \return The IPv4 address of the input interface of this route

   */

  uint32_t GetInputInterface (void) const;

  /**

   * \return The number of output interfaces of this route

   */

  uint32_t GetNOutputInterfaces (void) const;

  /**

   * \param n interface index

   * \return A specified output interface.

   */

  uint32_t GetOutputInterface (uint32_t n) const;

  /**

   * \return A vector of all of the output interfaces of this route.

   */

  std::vector<uint32_t> GetOutputInterfaces (void) const;

  /**

   * \return Ipv4MulticastRoutingTableEntry corresponding to the input parameters.

   * \param origin Source address for the multicast route 

   * \param group Group destination address for the multicast route

   * \param inputInterface Input interface that multicast datagram must be received on

   * \param outputInterfaces vector of output interfaces to copy and forward the datagram to

   */

  static Ipv4MulticastRoutingTableEntry CreateMulticastRoute (Ipv4Address origin, 

                                                              Ipv4Address group, uint32_t inputInterface,

                                                              std::vector<uint32_t> outputInterfaces);

private:

  Ipv4MulticastRoutingTableEntry (Ipv4Address origin, Ipv4Address group, 

                                  uint32_t inputInterface, std::vector<uint32_t> outputInterfaces);

  Ipv4Address m_origin;

  Ipv4Address m_group;

  uint32_t m_inputInterface;

  std::vector<uint32_t> m_outputInterfaces;

};

std::ostream& operator<< (std::ostream& os, Ipv4MulticastRoutingTableEntry const& route);

} // namespace ns3

#endif /* IPV4_ROUTING_TABLE_ENTRY_H */