ipv6-extension.h

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/*
 * 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: David Gross <gdavid.devel@gmail.com>
 */
 
#ifndef IPV6_EXTENSION_H
#define IPV6_EXTENSION_H
 
#include "ipv6-interface.h"
 
#include "ns3/buffer.h"
#include "ns3/ipv6-address.h"
#include "ns3/ipv6-header.h"
#include "ns3/ipv6-l3-protocol.h"
#include "ns3/node.h"
#include "ns3/object.h"
#include "ns3/packet.h"
#include "ns3/ptr.h"
#include "ns3/random-variable-stream.h"
#include "ns3/traced-callback.h"
 
#include <list>
#include <map>
#include <tuple>
 
namespace ns3
{
 
class Ipv6Extension : public Object
{
  public:
    static TypeId GetTypeId();
 
    Ipv6Extension();
 
    ~Ipv6Extension() override;
 
    void SetNode(Ptr<Node> node);
 
    Ptr<Node> GetNode() const;
 
    virtual uint8_t GetExtensionNumber() const = 0;
 
    virtual uint8_t Process(Ptr<Packet>& packet,
                            uint8_t offset,
                            const Ipv6Header& ipv6Header,
                            Ipv6Address dst,
                            uint8_t* nextHeader,
                            bool& stopProcessing,
                            bool& isDropped,
                            Ipv6L3Protocol::DropReason& dropReason) = 0;
 
    virtual uint8_t ProcessOptions(Ptr<Packet>& packet,
                                   uint8_t offset,
                                   uint8_t length,
                                   const Ipv6Header& ipv6Header,
                                   Ipv6Address dst,
                                   uint8_t* nextHeader,
                                   bool& stopProcessing,
                                   bool& isDropped,
                                   Ipv6L3Protocol::DropReason& dropReason);
 
    int64_t AssignStreams(int64_t stream);
 
  protected:
    Ptr<UniformRandomVariable> m_uvar;
 
  private:
    Ptr<Node> m_node;
};
 
class Ipv6ExtensionHopByHop : public Ipv6Extension
{
  public:
    static const uint8_t EXT_NUMBER = 0;
 
    static TypeId GetTypeId();
 
    Ipv6ExtensionHopByHop();
 
    ~Ipv6ExtensionHopByHop() override;
 
    uint8_t GetExtensionNumber() const override;
 
    uint8_t Process(Ptr<Packet>& packet,
                    uint8_t offset,
                    const Ipv6Header& ipv6Header,
                    Ipv6Address dst,
                    uint8_t* nextHeader,
                    bool& stopProcessing,
                    bool& isDropped,
                    Ipv6L3Protocol::DropReason& dropReason) override;
};
 
class Ipv6ExtensionDestination : public Ipv6Extension
{
  public:
    static const uint8_t EXT_NUMBER = 60;
 
    static TypeId GetTypeId();
 
    Ipv6ExtensionDestination();
 
    ~Ipv6ExtensionDestination() override;
 
    uint8_t GetExtensionNumber() const override;
 
    uint8_t Process(Ptr<Packet>& packet,
                    uint8_t offset,
                    const Ipv6Header& ipv6Header,
                    Ipv6Address dst,
                    uint8_t* nextHeader,
                    bool& stopProcessing,
                    bool& isDropped,
                    Ipv6L3Protocol::DropReason& dropReason) override;
};
 
class Ipv6ExtensionFragment : public Ipv6Extension
{
  public:
    static const uint8_t EXT_NUMBER = 44;
 
    static TypeId GetTypeId();
 
    Ipv6ExtensionFragment();
 
    ~Ipv6ExtensionFragment() override;
 
    uint8_t GetExtensionNumber() const override;
 
    uint8_t Process(Ptr<Packet>& packet,
                    uint8_t offset,
                    const Ipv6Header& ipv6Header,
                    Ipv6Address dst,
                    uint8_t* nextHeader,
                    bool& stopProcessing,
                    bool& isDropped,
                    Ipv6L3Protocol::DropReason& dropReason) override;
 
    typedef std::pair<Ptr<Packet>, Ipv6Header> Ipv6PayloadHeaderPair;
 
    void GetFragments(Ptr<Packet> packet,
                      Ipv6Header ipv6Header,
                      uint32_t fragmentSize,
                      std::list<Ipv6PayloadHeaderPair>& listFragments);
 
  protected:
    void DoDispose() override;
 
  private:
    typedef std::pair<Ipv6Address, uint32_t> FragmentKey_t;
 
    typedef std::list<std::tuple<Time, FragmentKey_t, Ipv6Header>> FragmentsTimeoutsList_t;
    typedef std::list<std::tuple<Time, FragmentKey_t, Ipv6Header>>::iterator
        FragmentsTimeoutsListI_t;
 
    class Fragments : public SimpleRefCount<Fragments>
    {
      public:
        Fragments();
 
        ~Fragments();
 
        void AddFragment(Ptr<Packet> fragment, uint16_t fragmentOffset, bool moreFragment);
 
        void SetUnfragmentablePart(Ptr<Packet> unfragmentablePart);
 
        bool IsEntire() const;
 
        Ptr<Packet> GetPacket() const;
 
        Ptr<Packet> GetPartialPacket() const;
 
        void SetTimeoutIter(FragmentsTimeoutsListI_t iter);
 
        FragmentsTimeoutsListI_t GetTimeoutIter();
 
      private:
        bool m_moreFragment;
 
        std::list<std::pair<Ptr<Packet>, uint16_t>> m_packetFragments;
 
        Ptr<Packet> m_unfragmentable;
 
        FragmentsTimeoutsListI_t m_timeoutIter;
    };
 
    void HandleFragmentsTimeout(FragmentKey_t key, Ipv6Header ipHeader);
 
    Ptr<Packet> GetPartialPacket() const;
 
    void SetTimeoutEventId(EventId event);
 
    void CancelTimeout();
 
    typedef std::map<FragmentKey_t, Ptr<Fragments>> MapFragments_t;
 
    MapFragments_t m_fragments;
 
    FragmentsTimeoutsListI_t SetTimeout(FragmentKey_t key, Ipv6Header ipHeader);
 
    void HandleTimeout();
 
    FragmentsTimeoutsList_t m_timeoutEventList; 
    EventId m_timeoutEvent;                     
    Time m_fragmentExpirationTimeout;           
};
 
class Ipv6ExtensionRouting : public Ipv6Extension
{
  public:
    static const uint8_t EXT_NUMBER = 43;
 
    static TypeId GetTypeId();
 
    Ipv6ExtensionRouting();
 
    ~Ipv6ExtensionRouting() override;
 
    uint8_t GetExtensionNumber() const override;
 
    virtual uint8_t GetTypeRouting() const;
 
    uint8_t Process(Ptr<Packet>& packet,
                    uint8_t offset,
                    const Ipv6Header& ipv6Header,
                    Ipv6Address dst,
                    uint8_t* nextHeader,
                    bool& stopProcessing,
                    bool& isDropped,
                    Ipv6L3Protocol::DropReason& dropReason) override;
};
 
class Ipv6ExtensionRoutingDemux : public Object
{
  public:
    static TypeId GetTypeId();
 
    Ipv6ExtensionRoutingDemux();
 
    ~Ipv6ExtensionRoutingDemux() override;
 
    void SetNode(Ptr<Node> node);
 
    void Insert(Ptr<Ipv6ExtensionRouting> extensionRouting);
 
    Ptr<Ipv6ExtensionRouting> GetExtensionRouting(uint8_t typeRouting);
 
    void Remove(Ptr<Ipv6ExtensionRouting> extensionRouting);
 
  protected:
    void DoDispose() override;
 
  private:
    typedef std::list<Ptr<Ipv6ExtensionRouting>> Ipv6ExtensionRoutingList_t;
 
    Ipv6ExtensionRoutingList_t m_extensionsRouting;
 
    Ptr<Node> m_node;
};
 
class Ipv6ExtensionLooseRouting : public Ipv6ExtensionRouting
{
  public:
    static const uint8_t TYPE_ROUTING = 0;
 
    static TypeId GetTypeId();
 
    Ipv6ExtensionLooseRouting();
 
    ~Ipv6ExtensionLooseRouting() override;
 
    uint8_t GetTypeRouting() const override;
 
    uint8_t Process(Ptr<Packet>& packet,
                    uint8_t offset,
                    const Ipv6Header& ipv6Header,
                    Ipv6Address dst,
                    uint8_t* nextHeader,
                    bool& stopProcessing,
                    bool& isDropped,
                    Ipv6L3Protocol::DropReason& dropReason) override;
};
 
class Ipv6ExtensionESP : public Ipv6Extension
{
  public:
    static const uint8_t EXT_NUMBER = 50;
 
    static TypeId GetTypeId();
 
    Ipv6ExtensionESP();
 
    ~Ipv6ExtensionESP() override;
 
    uint8_t GetExtensionNumber() const override;
 
    uint8_t Process(Ptr<Packet>& packet,
                    uint8_t offset,
                    const Ipv6Header& ipv6Header,
                    Ipv6Address dst,
                    uint8_t* nextHeader,
                    bool& stopProcessing,
                    bool& isDropped,
                    Ipv6L3Protocol::DropReason& dropReason) override;
};
 
class Ipv6ExtensionAH : public Ipv6Extension
{
  public:
    static const uint8_t EXT_NUMBER = 51;
 
    static TypeId GetTypeId();
 
    Ipv6ExtensionAH();
 
    ~Ipv6ExtensionAH() override;
 
    uint8_t GetExtensionNumber() const override;
 
    uint8_t Process(Ptr<Packet>& packet,
                    uint8_t offset,
                    const Ipv6Header& ipv6Header,
                    Ipv6Address dst,
                    uint8_t* nextHeader,
                    bool& stopProcessing,
                    bool& isDropped,
                    Ipv6L3Protocol::DropReason& dropReason) override;
};
 
} /* namespace ns3 */
 
#endif /* IPV6_EXTENSION_H */