/* -*-  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>
 *         Mehdi Benamor <benamor.mehdi@ensi.rnu.tn>
 *         David Gross <gdavid.devel@gmail.com>
 */

#ifndef ICMPV6_HEADER_H
#define ICMPV6_HEADER_H

#include "ns3/header.h"
#include "ns3/ipv6-address.h"
#include "ns3/packet.h"

namespace ns3
{

/**
 * \class Icmpv6Header
 * \brief ICMPv6 header.
 */
class Icmpv6Header : public Header
{
  public:
    /**
     * \enum Type_e
     * \brief ICMPv6 type code.
     */
    enum Type_e
    {
      ICMPV6_ERROR_DESTINATION_UNREACHABLE = 1,
      ICMPV6_ERROR_PACKET_TOO_BIG,
      ICMPV6_ERROR_TIME_EXCEEDED,
      ICMPV6_ERROR_PARAMETER_ERROR,
      ICMPV6_ECHO_REQUEST = 128,
      ICMPV6_ECHO_REPLY,
      ICMPV6_SUBSCRIBE_REQUEST,
      ICMPV6_SUBSCRIBE_REPORT,
      ICMPV6_SUBSCRIVE_END,
      ICMPV6_ND_ROUTER_SOLICITATION,
      ICMPV6_ND_ROUTER_ADVERTISEMENT,
      ICMPV6_ND_NEIGHBOR_SOLICITATION,
      ICMPV6_ND_NEIGHBOR_ADVERTISEMENT,
      ICMPV6_ND_REDIRECTION,
      ICMPV6_ROUTER_RENUMBER,
      ICMPV6_INFORMATION_REQUEST,
      ICMPV6_INFORMATION_RESPONSE,
      ICMPV6_INVERSE_ND_SOLICITATION,
      ICMPV6_INVERSE_ND_ADVERSTISEMENT,
      ICMPV6_MLDV2_SUBSCRIBE_REPORT,
      ICMPV6_MOBILITY_HA_DISCOVER_REQUEST,
      ICMPV6_MOBILITY_HA_DISCOVER_RESPONSE,
      ICMPV6_MOBILITY_MOBILE_PREFIX_SOLICITATION,
      ICMPV6_SECURE_ND_CERTIFICATE_PATH_SOLICITATION,
      ICMPV6_SECURE_ND_CERTIFICATE_PATH_ADVERTISEMENT,
      ICMPV6_EXPERIMENTAL_MOBILITY
    };

    /**
     * \enum OptionType_e
     * \brief ICMPv6 Option type code.
     */
    enum OptionType_e
    {
      ICMPV6_OPT_LINK_LAYER_SOURCE = 1,
      ICMPV6_OPT_LINK_LAYER_TARGET,
      ICMPV6_OPT_PREFIX,
      ICMPV6_OPT_REDIRECTED,
      ICMPV6_OPT_MTU
    };

    /**
     * \enum ErrorDestinationUnreachable_e
     * \brief ICMPv6 error code : Destination Unreachable
     */
    enum ErrorDestinationUnreachable_e
    {
      ICMPV6_NO_ROUTE = 0,
      ICMPV6_ADM_PROHIBITED,
      ICMPV6_NOT_NEIGHBOUR,
      ICMPV6_ADDR_UNREACHABLE,
      ICMPV6_PORT_UNREACHABLE
    };

    /**
     * \enum ErrorTimeExceeded_e
     * \brief ICMPv6 error code : Time Exceeded
     */
    enum ErrorTimeExceeded_e
    {
      ICMPV6_HOPLIMIT = 0,
      ICMPV6_FRAGTIME
    };

    /**
     * \enum ErrorParameterError_e
     * \brief ICMPv6 error code : Parameter Error
     */
    enum ErrorParameterError_e
    {
      ICMPV6_MALFORMED_HEADER = 0,
      ICMPV6_UNKNOWN_NEXT_HEADER,
      ICMPV6_UNKNOWN_OPTION
    };

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Constructor.
     */
    Icmpv6Header ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6Header ();

    /**
     * \brief Get the type field.
     * \return type of ICMPv6 message
     */
    uint8_t GetType () const;

    /**
     * \brief Set the type.
     * \param type type to set
     */
    void SetType (uint8_t type);

    /**
     * \brief Get the code field.
     * \return code of ICMPv6 message
     */
    uint8_t GetCode () const;

    /**
     * \brief Set the code field.
     * \param code code to set
     */
    void SetCode (uint8_t code);

    /**
     * \brief Get the checksum.
     * \return checksum
     */
    uint16_t GetChecksum () const;

    /**
     * \brief Set the checksum.
     * \param checksum to set
     */
    void SetChecksum (uint16_t checksum);
    
    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

    /**
     * \brief Calculate pseudo header checksum for IPv6.
     * \param src source address
     * \param dst destination address
     * \param length length
     * \param protocol the protocol number to use in the
     * underlying IPv6 packet.
     */
    void CalculatePseudoHeaderChecksum (Ipv6Address src, Ipv6Address dst, uint16_t length, uint8_t protocol);

  protected:
    /**
     * \brief Checksum enable or not.
     */
    bool m_calcChecksum;

    /**
     * \brief The checksum.
     */
    uint16_t m_checksum; 
  
  private:
    /**
     * \brief The type.
     */
    uint8_t m_type;

    /**
     * \brief The code.
     */
    uint8_t m_code;
};

/**
 * \class Icmpv6OptionHeader
 * \brief ICMPv6 option header.
 */
class Icmpv6OptionHeader : public Header
{
  public:
    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Constructor.
     */
    Icmpv6OptionHeader ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6OptionHeader ();

    /**
     * \brief Get the type of the option.
     * \return type
     */
    uint8_t GetType () const;

    /**
     * \brief Set the type of the option.
     * \param type the type to set
     */
    void SetType (uint8_t type);

    /**
     * \brief Get the length of the option in 8 bytes unit.
     * \return length of the option
     */
    uint8_t GetLength () const;

    /**
     * \brief Set the length of the option.
     * \param len length value to set
     */
    void SetLength (uint8_t len);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The type.
     */
    uint8_t m_type;

    /**
     * \brief The length.
     */
    uint8_t m_len;
};

/**
 * \class Icmpv6NS
 * \brief ICMPv6 Neighbor Solicitation header.
 */
class Icmpv6NS : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     * \param target target IPv6 address
     */
    Icmpv6NS (Ipv6Address target);

    /**
     * \brief Constructor.
     */
    Icmpv6NS ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6NS ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the reserved field.
     * \return reserved value
     */
    uint32_t GetReserved () const;

    /**
     * \brief Set the reserved field.
     * \param reserved the reserved value
     */
    void SetReserved (uint32_t reserved);

    /**
     * \brief Get the IPv6 target field.
     * \return IPv6 address
     */
    Ipv6Address GetIpv6Target () const;

    /**
     * \brief Set the IPv6 target field.
     * \param target IPv6 address
     */
    void SetIpv6Target (Ipv6Address target);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:

    /**
     * \brief The reserved value.
     */
    uint32_t m_reserved;

    /**
     * \brief The IPv6 target address.
     */
    Ipv6Address m_target;
};

/**
 * \class Icmpv6NA
 * \brief ICMPv6 Neighbor Advertisement header.
 */
class Icmpv6NA : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6NA ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6NA ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the reserved field.
     * \return reserved value
     */
    uint32_t GetReserved () const;

    /**
     * \brief Set the reserved field.
     * \param reserved the reserved value
     */
    void SetReserved (uint32_t reserved);

    /**
     * \brief Get the IPv6 target field.
     * \return IPv6 address
     */
    Ipv6Address GetIpv6Target () const;

    /**
     * \brief Set the IPv6 target field.
     * \param target IPv6 address
     */
    void SetIpv6Target (Ipv6Address target);

    /**
     * \brief Get the R flag.
     * \return R flag
     */
    bool GetFlagR () const;

    /**
     * \brief Set the R flag.
     * \param r value
     */
    void SetFlagR (bool r);

    /**
     * \brief Get the S flag.
     * \return S flag
     */
    bool GetFlagS () const;

    /**
     * \brief Set the S flag.
     * \param s value
     */
    void SetFlagS (bool s);

    /**
     * \brief Get the O flag.
     * \return O flag
     */
    bool GetFlagO () const;

    /**
     * \brief Set the O flag.
     * \param o value
     */
    void SetFlagO (bool o);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The R flag.
     */
    bool m_flagR;

    /**
     * \brief The O flag.
     */
    bool m_flagS;

    /**
     * \brief The M flag.
     */
    bool m_flagO;

    /**
     * \brief The reserved value.
     */
    uint32_t m_reserved;

    /**
     * \brief The IPv6 target address.
     */
    Ipv6Address m_target;
};

/**
 * \class Icmpv6RA
 * \brief ICMPv6 Router Advertisement header.
 */
class Icmpv6RA : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6RA ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6RA ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Set the IPv6 maximum number of jumps.
     * \param m maximum jumps
     */
    void SetCurHopLimit (uint8_t m);

    /**
     * \brief Get the IPv6 maximum number of jumps.
     * \return maximum jumps
     */
    uint8_t GetCurHopLimit () const;

    /**
     * \brief Set the node Life time (Neighbor Discovery).
     * \param l life time
     */
    void SetLifeTime (uint16_t l);

    /**
     * \brief Get the node Life time (Neighbor Discovery).
     * \return life time
     */
    uint16_t GetLifeTime () const;

    /**
     * \brief Set the node Reachable time (Neighbor Discovery).
     * \param r Reachable time
     */
    void SetReachableTime (uint32_t r);

    /**
     * \brief Get the node Reachable time (Neighbor Discovery).
     * \return reachable time
     */
    uint32_t GetReachableTime () const;

    /**
     * \brief Set the node Retransmission time (Neighbor Discovery).
     * \param r Retransmission time
     */
    void SetRetransmissionTime (uint32_t r);

    /**
     * \brief Get the node Retransmission time (Neighbor Discovery).
     * \return retransmission time
     */
    uint32_t GetRetransmissionTime () const;

    /**
     * \brief Get the M flag.
     * \return M flag
     */
    bool GetFlagM () const;

    /**
     * \brief Set the M flag.
     * \param m value
     */
    void SetFlagM (bool m);

    /**
     * \brief Get the O flag.
     * \return O flag
     */
    bool GetFlagO () const;

    /**
     * \brief Set the O flag.
     * \param o value
     */
    void SetFlagO (bool o);

    /**
     * \brief Get the H flag.
     * \return H flag
     */
    bool GetFlagH () const;

    /**
     * \brief Set the H flag.
     * \param h value
     */
    void SetFlagH (bool h);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Getflags.
     * \return the flags value
     */
    uint8_t GetFlags () const;

    /**
     * \brief Setflags.
     * \param f the flags value
     */
    void SetFlags (uint8_t f);

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The M flag.
     */
    bool m_flagM;

    /**
     * \brief The O flag.
     */
    bool m_flagO;

    /**
     * \brief The H flag.
     */
    bool m_flagH;

    /**
     * \brief The flags field value.
     */
    uint8_t m_flags;

    /**
     * \brief The lifetime value.
     */
    uint16_t m_LifeTime;

    /**
     * \brief The reachable time value.
     */
    uint32_t m_ReachableTime;

    /**
     * \brief The retransmission timer.
     */
    uint32_t m_RetransmissionTimer;

    /**
     * \brief The max jumps.
     */
    uint8_t m_curHopLimit;
};

/**
 * \class Icmpv6RS
 * \brief ICMPv6 Router Solicitation header.
 */
class Icmpv6RS : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6RS ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6RS ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the reserved field.
     * \return reserved value
     */
    uint32_t GetReserved () const;

    /**
     * \brief Set the reserved field.
     * \param reserved the reserved value
     */
    void SetReserved (uint32_t reserved);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The reserved value.
     */
    uint32_t m_reserved;
};

/**
 * \class Icmpv6Redirection
 * \brief ICMPv6 Redirection header.
 */
class Icmpv6Redirection : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6Redirection ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6Redirection ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the IPv6 target address.
     * \return the IPv6 target address
     */
    Ipv6Address GetTarget () const;

    /**
     * \brief Set the IPv6 target address.
     * \param target IPv6 target address
     */
    void SetTarget (Ipv6Address target);

    /**
     * \brief Get the IPv6 destination address.
     * \return the IPv6 destination address
     */
    Ipv6Address GetDestination () const;

    /**
     * \brief Set the IPv6 destination address.
     * \param destination IPv6 destination address
     */
    void SetDestination (Ipv6Address destination);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

    /**
     * \brief Get the reserved field.
     * \return reserved value
     */
    uint32_t GetReserved () const;

    /**
     * \brief Set the reserved field.
     * \param reserved the reserved value
     */
    void SetReserved (uint32_t reserved);

  private:
    /**
     * \brief IPv6 target address.
     */
    Ipv6Address m_target;

    /**
     * \brief IPv6 destination address.
     */
    Ipv6Address m_destination;

    /**
     * \brief Reserved value.
     */
    uint32_t m_reserved;
};

/**
 * \class Icmpv6Echo
 * \brief ICMPv6 Echo message.
 */
class Icmpv6Echo : public Icmpv6Header
{
  public:
    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Default constructor.
     */
    Icmpv6Echo ();

    /**
     * \brief Constructor.
     * \param request request or reply message
     */
    Icmpv6Echo (bool request);

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6Echo ();

    /**
     * \brief Get the ID of the packet.
     * \return id
     */
    uint16_t GetId () const;

    /**
     * \brief Set the ID of the packet.
     * \param id id to set
     */
    void SetId (uint16_t id);

    /**
     * \brief Get the sequence number.
     * \return sequence number
     */
    uint16_t GetSeq () const;

    /**
     * \brief Set the sequence number.
     * \param seq sequence to set
     */
    void SetSeq (uint16_t seq);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief ID of the packet (to distinguish response between many ping program).
     */
    uint16_t m_id;

    /**
     * \brief Sequence number (to distinguish response).
     */
    uint16_t m_seq;
};

/**
 * \class Icmpv6DestinationUnreachable
 * \brief ICMPv6 Error Destination Unreachable header.
 */
class Icmpv6DestinationUnreachable : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6DestinationUnreachable ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6DestinationUnreachable ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the incorrect packet.
     * \return the incorrect packet
     */
    Ptr<Packet> GetPacket () const;

    /**
     * \brief Set the incorrect packet.
     * \param p the incorrect packet
     */
    void SetPacket (Ptr<Packet> p);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The incorrect Packet.
     */
    Ptr<Packet> m_packet;
};

/**
 * \class Icmpv6TooBig
 * \brief ICMPv6 Error Too Big header.
 */
class Icmpv6TooBig : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6TooBig ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6TooBig ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the incorrect packet.
     * \return the incorrect packet
     */
    Ptr<Packet> GetPacket () const;

    /**
     * \brief Set the incorrect packet.
     * \param p the incorrect packet
     */
    void SetPacket (Ptr<Packet> p);

    /**
     * \brief Get the MTU field.
     * \return MTU value
     */
    uint32_t GetMtu () const;

    /**
     * \brief Set the MTU.
     * \param mtu the MTU
     */
    void SetMtu (uint32_t mtu);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:

    /**
     * \brief the incorrect packet.
     */
    Ptr<Packet> m_packet;

    /**
     * \brief The MTU value.
     */
    uint32_t m_mtu;
};

/**
 * \class Icmpv6TimeExceeded
 * \brief ICMPv6 Error Time Exceeded header.
 */
class Icmpv6TimeExceeded : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6TimeExceeded ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6TimeExceeded ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the incorrect packet.
     * \return the incorrect packet
     */
    Ptr<Packet> GetPacket () const;

    /**
     * \brief Set the incorrect packet.
     * \param p the incorrect packet
     */
    void SetPacket (Ptr<Packet> p);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:

    /**
     * \brief The incorrect packet.
     */
    Ptr<Packet> m_packet;
};

/**
 * \class Icmpv6ParameterError
 * \brief ICMPv6 Error Parameter Error header.
 */
class Icmpv6ParameterError : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6ParameterError ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6ParameterError ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the incorrect packet.
     * \return the incorrect packet
     */
    Ptr<Packet> GetPacket () const;

    /**
     * \brief Set the incorrect packet.
     * \param p the incorrect packet
     */
    void SetPacket (Ptr<Packet> p);

    /**
     * \brief Get the pointer field.
     * \return pointer value
     */
    uint32_t GetPtr () const;

    /**
     * \brief Set the pointer field.
     * \param ptr byte where the error is located in the incorrect packet
     */
    void SetPtr (uint32_t ptr);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:

    /**
     * \brief The incorrect packet.
     */
    Ptr<Packet> m_packet;

    /**
     * \brief The pointer field.
     */
    uint32_t m_ptr;
};

/**
 * \class Icmpv6OptionMtu
 * \brief ICMPv6 MTU option.
 */
class Icmpv6OptionMtu : public Icmpv6OptionHeader
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6OptionMtu ();

    /**
     * \brief Constructor.
     * \param mtu MTU used.
     */
    Icmpv6OptionMtu (uint32_t mtu);

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6OptionMtu ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the reserved field.
     * \return the reserved value
     */
    uint16_t GetReserved () const;

    /**
     * \brief Set the reserved field.
     * \param reserved the reserved value
     */
    void SetReserved (uint16_t reserved);

    /**
     * \brief Get the MTU.
     * \return the MTU value
     */
    uint32_t GetMtu () const;

    /**
     * \brief Set the MTU.
     * \param mtu the MTU to set
     */
    void SetMtu (uint32_t mtu);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The reserved value
     */
    uint16_t m_reserved;

    /**
     * \brief The MTU value.
     */
    uint32_t m_mtu;
};

/**
 * \class Icmpv6OptionPrefixInformation
 * \brief ICMPv6 Option Prefix Information.
 */
class Icmpv6OptionPrefixInformation : public Icmpv6OptionHeader
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6OptionPrefixInformation ();

    /**
     * \brief Constructor.
     * \param network prefix
     * \param prefixlen prefix length
     */
    Icmpv6OptionPrefixInformation (Ipv6Address network, uint8_t prefixlen);

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6OptionPrefixInformation ();

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Get the prefix length.
     * \return prefix length
     */
    uint8_t GetPrefixLength () const;

    /**
     * \brief Set the prefix length.
     * \param prefixLength the prefix length
     */
    void SetPrefixLength (uint8_t prefixLength);

    /**
     * \brief Get the flags.
     * \return the flags.
     */
    uint8_t GetFlags () const;

    /**
     * \brief Set the flags.
     * \param flags the flags to set
     */
    void SetFlags (uint8_t flags);

    /**
     * \brief Get the valid time of the information.
     * \return valid time
     */
    uint32_t GetValidTime () const;

    /**
     * \brief Set the valid time of the information.
     * \param validTime valid time
     */
    void SetValidTime (uint32_t validTime);

    /**
     * \brief Get the preferred time of the information.
     * \return preferred time
     */
    uint32_t GetPreferredTime () const;

    /**
     * \brief Set the preferred time of the information.
     * \param preferredTime preferred time
     */
    void SetPreferredTime (uint32_t preferredTime);

    /**
     * \brief Get the reserved field.
     * \return the reserved field (should be 0x00000000)
     */
    uint32_t GetReserved () const;

    /**
     * \brief Set the reserved field (normally it will be 0x00000000).
     * \param reserved reserved value
     */
    void SetReserved (uint32_t reserved);

    /**
     * \brief Get the IPv6 prefix.
     * \return IPv6 prefix
     */
    Ipv6Address GetPrefix () const;

    /**
     * \brief Set the IPv6 prefix.
     * \param prefix the IPv6 prefix
     */
    void SetPrefix (Ipv6Address prefix);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The prefix value.
     */
    Ipv6Address m_prefix;

    /**
     * \brief The length of the prefix.
     */
    uint8_t m_prefixLength;

    /**
     * \brief The flags.
     */
    uint8_t m_flags;

    /**
     * \brief The valid time.
     */
    uint32_t m_validTime;

    /**
     * \brief The preferred time.
     */
    uint32_t m_preferredTime;

    /**
     * \brief The reserved field.
     */
    uint32_t m_reserved;
};

/**
 * \class Icmpv6OptionLinkLayerAddress
 * \brief ICMPv6 link-layer address option.
 */
class Icmpv6OptionLinkLayerAddress : public Icmpv6OptionHeader
{
  public:
    /**
     * \brief Constructor.
     * \param source source hardware address or target hardware address for the option
     */
    Icmpv6OptionLinkLayerAddress (bool source);

    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Constructor.
     * \param source source hardware address or target hardware address for the option
     * \param addr hardware address
     */
    Icmpv6OptionLinkLayerAddress (bool source, Address addr);

    /**
     * \brief Constructor.
     */
    Icmpv6OptionLinkLayerAddress ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6OptionLinkLayerAddress ();

    /**
     * \brief Get the hardware address.
     * \return the hardware address
     */
    Address GetAddress () const;

    /**
     * \brief Set the hardware address.
     * \param addr the address to set
     */
    void SetAddress (Address addr);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The hardware address.
     */
    Address m_addr;
};

/**
 * \class Icmpv6OptionRedirected
 * \brief ICMPv6 redirected option.
 */
class Icmpv6OptionRedirected : public Icmpv6OptionHeader
{
  public:
    /**
     * \brief Get the UID of this class.
     * \return UID
     */
    static TypeId GetTypeId ();

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

    /**
     * \brief Constructor.
     */
    Icmpv6OptionRedirected ();

    /**
     * \brief Destructor.
     */
    virtual ~Icmpv6OptionRedirected ();

    /**
     * \brief Get the redirected packet.
     * \return the redirected packet
     */
    Ptr<Packet> GetPacket () const;

    /**
     * \brief Set the redirected packet.
     * \param packet the redirected packet
     */
    void SetPacket (Ptr<Packet> packet);

    /**
     * \brief Print informations.
     * \param os output stream
     */
    virtual void Print (std::ostream& os) const;

    /**
     * \brief Get the serialized size.
     * \return serialized size
     */
    virtual uint32_t GetSerializedSize () const;

    /**
     * \brief Serialize the packet.
     * \param start start offset
     */
    virtual void Serialize (Buffer::Iterator start) const;

    /**
     * \brief Deserialize the packet.
     * \param start start offset
     * \return length of packet
     */
    virtual uint32_t Deserialize (Buffer::Iterator start);

  private:
    /**
     * \brief The redirected packet.
     */
    Ptr<Packet> m_packet;
};

} /* namespace ns3 */

#endif /* ICMPV6_HEADER_H */