/*
 * Copyright (c) 2007-2009 Strasbourg University
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * 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
{

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 header.
 */
class Icmpv6Header : public Header
{
  public:
    /**
     * \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
    };

    /**
     * \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
    };

    /**
     * \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
    };

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

    /**
     * \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
     */
    TypeId GetInstanceTypeId() const override;

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

    /**
     * \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;
};

/**
 * \ingroup icmpv6
 *
 * \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
     */
    TypeId GetInstanceTypeId() const override;

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \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.
     */
    ~Icmpv6NS() override;

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 Neighbor Advertisement header.
 */
class Icmpv6NA : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6NA();

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

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

  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;
};

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 Router Advertisement header.
 */
class Icmpv6RA : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6RA();

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

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

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

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

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

    /**
     * \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;
};

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 Router Solicitation header.
 */
class Icmpv6RS : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6RS();

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

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 Redirection header.
 */
class Icmpv6Redirection : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6Redirection();

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

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

    /**
     * \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;
};

/**
 * \ingroup icmpv6
 *
 * \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
     */
    TypeId GetInstanceTypeId() const override;

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

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

  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;
};

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 Error Destination Unreachable header.
 */
class Icmpv6DestinationUnreachable : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6DestinationUnreachable();

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

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

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

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

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

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 Error Too Big header.
 */
class Icmpv6TooBig : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6TooBig();

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

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 Error Time Exceeded header.
 */
class Icmpv6TimeExceeded : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6TimeExceeded();

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

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

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

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

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

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 Error Parameter Error header.
 */
class Icmpv6ParameterError : public Icmpv6Header
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6ParameterError();

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

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \brief ICMPv6 MTU option.
 */
class Icmpv6OptionMtu : public Icmpv6OptionHeader
{
  public:
    /**
     * \brief Constructor.
     */
    Icmpv6OptionMtu();

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

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

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

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

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \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.
     */
    ~Icmpv6OptionPrefixInformation() override;

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

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

    /**
     * \brief Icmpv6 Option Prefix Information flag field values
     */
    enum Flags_t
    {
        NONE = 0,         //!< No flags
        ROUTERADDR = 32,  //!< Router Address
        AUTADDRCONF = 64, //!< Autonomous Address Configuration
        ONLINK = 128      //!< On-link
    };

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

  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;
};

/**
 * \ingroup icmpv6
 *
 * \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
     */
    TypeId GetInstanceTypeId() const override;

    /**
     * \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.
     */
    ~Icmpv6OptionLinkLayerAddress() override;

    /**
     * \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 information.
     * \param os output stream
     */
    void Print(std::ostream& os) const override;

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

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

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

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

/**
 * \ingroup icmpv6
 *
 * \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
     */
    TypeId GetInstanceTypeId() const override;

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

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

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

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

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

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

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

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

} /* namespace ns3 */

#endif /* ICMPV6_HEADER_H */
