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

/*

 * Copyright (c) 2007-2009 Strasbourg University

 *

 * 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: Sebastien Vincent <vincent@clarinet.u-strasbg.fr>

 */

#ifndef IPV6_STATIC_ROUTING_H

#define IPV6_STATIC_ROUTING_H

#include <stdint.h>

#include <list>

#include "ns3/ptr.h"

#include "ns3/ipv6-address.h"

#include "ns3/ipv6.h"

#include "ns3/ipv6-header.h"

#include "ns3/ipv6-routing-protocol.h"

namespace ns3

{

class Packet;

class NetDevice;

class Ipv6Interface;

class Ipv6Route;

class Node;

class Ipv6RoutingTableEntry;

class Ipv6MulticastRoutingTableEntry;

/**

 * \defgroup ipv6StaticRouting Ipv6StaticRouting

 */

/**

 * \ingroup ipv6StaticRouting

 * \class Ipv6StaticRouting

 * \brief Static routing protocol for IP version 6 stack.

 * \see Ipv6RoutingProtocol

 * \see Ipv6ListRouting

 */

class Ipv6StaticRouting : public Ipv6RoutingProtocol

{

public:

  /**

   * \brief The interface Id associated with this class.

   * \return type identifier

   */

  static TypeId GetTypeId ();

  /**

   * \brief Constructor.

   */

  Ipv6StaticRouting ();

  /**

   * \brief Destructor.

   */

  virtual ~Ipv6StaticRouting ();

  /**

   * \brief Add route to host.

   * \param dest destination address

   * \param nextHop next hop address to route the packet

   * \param interface interface index

   * \param prefixToUse prefix that should be used for source address for this destination

   * \param metric metric of route in case of multiple routes to same destination

   */

  void AddHostRouteTo (Ipv6Address dest, Ipv6Address nextHop, uint32_t interface, Ipv6Address prefixToUse = Ipv6Address ("::"), uint32_t metric = 0);

  /**

   * \brief Add route to host.

   * \param dest destination address.

   * \param interface interface index

   * \param metric metric of route in case of multiple routes to same destination

   */

  void AddHostRouteTo (Ipv6Address dest, uint32_t interface, uint32_t metric = 0);

  /**

   * \brief Add route to network.

   * \param network network address

   * \param networkPrefix network prefix*

   * \param nextHop next hop address to route the packet

   * \param interface interface index

   * \param metric metric of route in case of multiple routes to same destination

   */

  void AddNetworkRouteTo (Ipv6Address network, Ipv6Prefix networkPrefix, Ipv6Address nextHop, uint32_t interface, uint32_t metric = 0);

  /**

   * \brief Add route to network.

   * \param network network address

   * \param networkPrefix network prefix*

   * \param nextHop next hop address to route the packet

   * \param interface interface index

   * \param prefixToUse prefix that should be used for source address for this destination

   * \param metric metric of route in case of multiple routes to same destination

   */

  void AddNetworkRouteTo (Ipv6Address network, Ipv6Prefix networkPrefix, Ipv6Address nextHop, uint32_t interface, Ipv6Address prefixToUse, uint32_t metric = 0);

  /**

   * \brief Add route to network.

   * \param network network address

   * \param networkPrefix network prefix

   * \param interface interface index

   * \param metric metric of route in case of multiple routes to same destination

   */

  void AddNetworkRouteTo (Ipv6Address network, Ipv6Prefix networkPrefix, uint32_t interface, uint32_t metric = 0);

  /**

   * \brief Set the default route.

   * \param nextHop next hop address to route the packet

   * \param interface interface index

   * \param prefixToUse prefix to use (i.e for multihoming)

   * \param metric metric of route in case of multiple routes to same destination

   */

  void SetDefaultRoute (Ipv6Address nextHop, uint32_t interface, Ipv6Address prefixToUse = Ipv6Address ("::"), uint32_t metric = 0);

  /**

   * \brief Get the number or entries in the routing table.

   * \return number of entries

   */

  uint32_t GetNRoutes ();

  /**

   * \brief Get the default route.

   *

   * If multiple default routes exist, the one with lowest metric is returned.

   * \return default Ipv6Route

   */

  Ipv6RoutingTableEntry GetDefaultRoute ();

  /**

   * \brief Get a specified route.

   * \param i index

   * \return the route whose index is i

   */

  Ipv6RoutingTableEntry GetRoute (uint32_t i);

  /**

   * \brief Get a metric for route from the static unicast routing table.

   * \param index The index (into the routing table) of the route to retrieve.

   * \return If route is set, the metric is returned. If not, an infinity metric (0xffffffff) is returned

   */

  uint32_t GetMetric (uint32_t index);

  /**

   * \brief Remove a route from the routing table.

   * \param i index

   */

  void RemoveRoute (uint32_t i);

  /**

   * \brief Remove a route from the routing table.

   * \param network IPv6 network

   * \param prefix IPv6 prefix

   * \param ifIndex interface index

   * \param prefixToUse IPv6 prefix to use with this route (multihoming)

   */

  void RemoveRoute (Ipv6Address network, Ipv6Prefix prefix, uint32_t ifIndex, Ipv6Address prefixToUse);

  /**

   * \brief Add a multicast route for a given multicast source and group.

   * \param origin IPv6 address of the source

   * \param group the multicast group address.

   * \param inputInterface the interface index

   * \param outputInterfaces the list of output interface indices over which the packet

   * should be sent (excluding the inputInterface).

   */

  void AddMulticastRoute (Ipv6Address origin, Ipv6Address group, uint32_t inputInterface, std::vector<uint32_t> outputInterfaces);

  /**

   * \brief Set the default multicast route.

   * \param outputInterface default output interface

   */

  void SetDefaultMulticastRoute (uint32_t outputInterface);

  /**

   * \brief Get the number of entries in the multicast routing table.

   * \return number of entries

   */

  uint32_t GetNMulticastRoutes () const;

  /**

   * \brief Get the specified multicast route.

   * \param i index

   * \return the route whose index is i

   */

  Ipv6MulticastRoutingTableEntry GetMulticastRoute (uint32_t i) const;

  /**

   * \brief Remove a static multicast route.

   * \param origin IPv6 address of the source

   * \param group the multicast group address.

   * \param inputInterface the input interface index

   */

  bool RemoveMulticastRoute (Ipv6Address origin, Ipv6Address group, uint32_t inputInterface);

  /**

   * \brief Remove a multicast route.

   * \param i index of route to remove

   */

  void RemoveMulticastRoute (uint32_t i);

  /**

   * \brief If the destination is already present in network destination list.

   * \param dest destination address

   * \param interfaceIndex interface index

   * \return true if dest is already in list, false otherwise

   */

  bool HasNetworkDest (Ipv6Address dest, uint32_t interfaceIndex);

  virtual Ptr<Ipv6Route> RouteOutput (Ptr<Packet> p, const Ipv6Header &header, Ptr<NetDevice> oif, Socket::SocketErrno &sockerr);

  virtual bool RouteInput  (Ptr<const Packet> p, const Ipv6Header &header, Ptr<const NetDevice> idev,

                            UnicastForwardCallback ucb, MulticastForwardCallback mcb,

                            LocalDeliverCallback lcb, ErrorCallback ecb);

  virtual void NotifyInterfaceUp (uint32_t interface);

  virtual void NotifyInterfaceDown (uint32_t interface);

  virtual void NotifyAddAddress (uint32_t interface, Ipv6InterfaceAddress address);

  virtual void NotifyRemoveAddress (uint32_t interface, Ipv6InterfaceAddress address);

  virtual void NotifyAddRoute (Ipv6Address dst, Ipv6Prefix mask, Ipv6Address nextHop, uint32_t interface, Ipv6Address prefixToUse = Ipv6Address::GetZero ());

  virtual void NotifyRemoveRoute (Ipv6Address dst, Ipv6Prefix mask, Ipv6Address nextHop, uint32_t interface, Ipv6Address prefixToUse = Ipv6Address::GetZero ());

  virtual void SetIpv6 (Ptr<Ipv6> ipv6);

protected:

  /**

   * \brief Dispose this object.

   */

  void DoDispose ();

private:

  typedef std::list<std::pair <Ipv6RoutingTableEntry *, uint32_t> > NetworkRoutes;

  typedef std::list<std::pair <Ipv6RoutingTableEntry *, uint32_t> >::const_iterator NetworkRoutesCI;

  typedef std::list<std::pair <Ipv6RoutingTableEntry *, uint32_t> >::iterator NetworkRoutesI;

  typedef std::list<Ipv6MulticastRoutingTableEntry *> MulticastRoutes;

  typedef std::list<Ipv6MulticastRoutingTableEntry *>::const_iterator MulticastRoutesCI;

  typedef std::list<Ipv6MulticastRoutingTableEntry *>::iterator MulticastRoutesI;

  /**

   * \brief Lookup in the forwarding table for destination.

   * \param dest destination address

   * \param interface output interface if any (put 0 otherwise)

   * \return Ipv6Route to route the packet to reach dest address

   */

  Ptr<Ipv6Route> LookupStatic (Ipv6Address dest, Ptr<NetDevice> = 0);

  /**

   * \brief Lookup in the multicast forwarding table for destination.

   * \param origin source address

   * \param group group multicast address

   * \param ifIndex interface index

   * \return Ipv6MulticastRoute to route the packet to reach dest address

   */

  Ptr<Ipv6MulticastRoute> LookupStatic (Ipv6Address origin, Ipv6Address group, uint32_t ifIndex);

  /**

   * \brief Choose the source address to use with destination address.

   * \param interface interface index

   * \param dest IPv6 destination address

   * \return IPv6 source address to use

   */

  Ipv6Address SourceAddressSelection (uint32_t interface, Ipv6Address dest);

  /**

   * \brief the forwarding table for network.

   */

  NetworkRoutes m_networkRoutes;

  /**

   * \brief the forwarding table for multicast.

   */

  MulticastRoutes m_multicastRoutes;

  /**

   * \brief Ipv6 reference.

   */

  Ptr<Ipv6> m_ipv6;

};

} /* namespace ns3 */

#endif /* IPV6_STATIC_ROUTING_H */