/*
 * Copyright (c) 2007-2009 Strasbourg University
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Author: David Gross <gdavid.devel@gmail.com>
 */

#include "ipv6-option-header.h"

#include "ns3/assert.h"
#include "ns3/header.h"
#include "ns3/log.h"

namespace ns3
{

NS_LOG_COMPONENT_DEFINE("Ipv6OptionHeader");

NS_OBJECT_ENSURE_REGISTERED(Ipv6OptionHeader);

TypeId
Ipv6OptionHeader::GetTypeId()
{
    static TypeId tid = TypeId("ns3::Ipv6OptionHeader")
                            .AddConstructor<Ipv6OptionHeader>()
                            .SetParent<Header>()
                            .SetGroupName("Internet");
    return tid;
}

TypeId
Ipv6OptionHeader::GetInstanceTypeId() const
{
    return GetTypeId();
}

Ipv6OptionHeader::Ipv6OptionHeader()
    : m_type(0),
      m_length(0)
{
}

Ipv6OptionHeader::~Ipv6OptionHeader()
{
}

void
Ipv6OptionHeader::SetType(uint8_t type)
{
    m_type = type;
}

uint8_t
Ipv6OptionHeader::GetType() const
{
    return m_type;
}

void
Ipv6OptionHeader::SetLength(uint8_t length)
{
    m_length = length;
}

uint8_t
Ipv6OptionHeader::GetLength() const
{
    return m_length;
}

void
Ipv6OptionHeader::Print(std::ostream& os) const
{
    os << "( type = " << (uint32_t)m_type << " )";
}

uint32_t
Ipv6OptionHeader::GetSerializedSize() const
{
    return m_length + 2;
}

void
Ipv6OptionHeader::Serialize(Buffer::Iterator start) const
{
    Buffer::Iterator i = start;

    i.WriteU8(m_type);
    i.WriteU8(m_length);

    i.Write(m_data.Begin(), m_data.End());
}

uint32_t
Ipv6OptionHeader::Deserialize(Buffer::Iterator start)
{
    Buffer::Iterator i = start;

    m_type = i.ReadU8();
    m_length = i.ReadU8();

    m_data = Buffer();
    m_data.AddAtEnd(m_length);
    Buffer::Iterator dataStart = i;
    i.Next(m_length);
    Buffer::Iterator dataEnd = i;
    m_data.Begin().Write(dataStart, dataEnd);

    return GetSerializedSize();
}

Ipv6OptionHeader::Alignment
Ipv6OptionHeader::GetAlignment() const
{
    return Alignment{1, 0};
}

NS_OBJECT_ENSURE_REGISTERED(Ipv6OptionPad1Header);

TypeId
Ipv6OptionPad1Header::GetTypeId()
{
    static TypeId tid = TypeId("ns3::Ipv6OptionPad1Header")
                            .AddConstructor<Ipv6OptionPad1Header>()
                            .SetParent<Ipv6OptionHeader>()
                            .SetGroupName("Internet");
    return tid;
}

TypeId
Ipv6OptionPad1Header::GetInstanceTypeId() const
{
    return GetTypeId();
}

Ipv6OptionPad1Header::Ipv6OptionPad1Header()
{
    SetType(0);
}

Ipv6OptionPad1Header::~Ipv6OptionPad1Header()
{
}

void
Ipv6OptionPad1Header::Print(std::ostream& os) const
{
    os << "( type = " << (uint32_t)GetType() << " )";
}

uint32_t
Ipv6OptionPad1Header::GetSerializedSize() const
{
    return 1;
}

void
Ipv6OptionPad1Header::Serialize(Buffer::Iterator start) const
{
    Buffer::Iterator i = start;

    i.WriteU8(GetType());
}

uint32_t
Ipv6OptionPad1Header::Deserialize(Buffer::Iterator start)
{
    Buffer::Iterator i = start;

    SetType(i.ReadU8());

    return GetSerializedSize();
}

NS_OBJECT_ENSURE_REGISTERED(Ipv6OptionPadnHeader);

TypeId
Ipv6OptionPadnHeader::GetTypeId()
{
    static TypeId tid = TypeId("ns3::Ipv6OptionPadnHeader")
                            .AddConstructor<Ipv6OptionPadnHeader>()
                            .SetParent<Ipv6OptionHeader>()
                            .SetGroupName("Internet");
    return tid;
}

TypeId
Ipv6OptionPadnHeader::GetInstanceTypeId() const
{
    return GetTypeId();
}

Ipv6OptionPadnHeader::Ipv6OptionPadnHeader(uint32_t pad)
{
    SetType(1);
    NS_ASSERT_MSG(pad >= 2, "PadN must be at least 2 bytes long");
    SetLength(pad - 2);
}

Ipv6OptionPadnHeader::~Ipv6OptionPadnHeader()
{
}

void
Ipv6OptionPadnHeader::Print(std::ostream& os) const
{
    os << "( type = " << (uint32_t)GetType() << " length = " << (uint32_t)GetLength() << " )";
}

uint32_t
Ipv6OptionPadnHeader::GetSerializedSize() const
{
    return GetLength() + 2;
}

void
Ipv6OptionPadnHeader::Serialize(Buffer::Iterator start) const
{
    Buffer::Iterator i = start;

    i.WriteU8(GetType());
    i.WriteU8(GetLength());

    for (int padding = 0; padding < GetLength(); padding++)
    {
        i.WriteU8(0);
    }
}

uint32_t
Ipv6OptionPadnHeader::Deserialize(Buffer::Iterator start)
{
    Buffer::Iterator i = start;

    SetType(i.ReadU8());
    SetLength(i.ReadU8());

    return GetSerializedSize();
}

NS_OBJECT_ENSURE_REGISTERED(Ipv6OptionJumbogramHeader);

TypeId
Ipv6OptionJumbogramHeader::GetTypeId()
{
    static TypeId tid = TypeId("ns3::Ipv6OptionJumbogramHeader")
                            .AddConstructor<Ipv6OptionJumbogramHeader>()
                            .SetParent<Ipv6OptionHeader>()
                            .SetGroupName("Internet");
    return tid;
}

TypeId
Ipv6OptionJumbogramHeader::GetInstanceTypeId() const
{
    return GetTypeId();
}

Ipv6OptionJumbogramHeader::Ipv6OptionJumbogramHeader()
{
    SetType(0xC2);
    SetLength(4);
    m_dataLength = 0;
}

Ipv6OptionJumbogramHeader::~Ipv6OptionJumbogramHeader()
{
}

void
Ipv6OptionJumbogramHeader::SetDataLength(uint32_t dataLength)
{
    m_dataLength = dataLength;
}

uint32_t
Ipv6OptionJumbogramHeader::GetDataLength() const
{
    return m_dataLength;
}

void
Ipv6OptionJumbogramHeader::Print(std::ostream& os) const
{
    os << "( type = " << (uint32_t)GetType() << " length = " << (uint32_t)GetLength()
       << " data length = " << (uint32_t)m_dataLength << " )";
}

uint32_t
Ipv6OptionJumbogramHeader::GetSerializedSize() const
{
    return GetLength() + 2;
}

void
Ipv6OptionJumbogramHeader::Serialize(Buffer::Iterator start) const
{
    Buffer::Iterator i = start;

    i.WriteU8(GetType());
    i.WriteU8(GetLength());
    i.WriteHtonU32(m_dataLength);
}

uint32_t
Ipv6OptionJumbogramHeader::Deserialize(Buffer::Iterator start)
{
    Buffer::Iterator i = start;

    SetType(i.ReadU8());
    SetLength(i.ReadU8());
    m_dataLength = i.ReadNtohU16();

    return GetSerializedSize();
}

Ipv6OptionHeader::Alignment
Ipv6OptionJumbogramHeader::GetAlignment() const
{
    return Alignment{4, 2}; // 4n+2
}

NS_OBJECT_ENSURE_REGISTERED(Ipv6OptionRouterAlertHeader);

TypeId
Ipv6OptionRouterAlertHeader::GetTypeId()
{
    static TypeId tid = TypeId("ns3::Ipv6OptionRouterAlertHeader")
                            .AddConstructor<Ipv6OptionRouterAlertHeader>()
                            .SetParent<Ipv6OptionHeader>()
                            .SetGroupName("Internet");
    return tid;
}

TypeId
Ipv6OptionRouterAlertHeader::GetInstanceTypeId() const
{
    return GetTypeId();
}

Ipv6OptionRouterAlertHeader::Ipv6OptionRouterAlertHeader()
    : m_value(0)
{
    SetType(5);
    SetLength(2);
}

Ipv6OptionRouterAlertHeader::~Ipv6OptionRouterAlertHeader()
{
}

void
Ipv6OptionRouterAlertHeader::SetValue(uint16_t value)
{
    m_value = value;
}

uint16_t
Ipv6OptionRouterAlertHeader::GetValue() const
{
    return m_value;
}

void
Ipv6OptionRouterAlertHeader::Print(std::ostream& os) const
{
    os << "( type = " << (uint32_t)GetType() << " length = " << (uint32_t)GetLength()
       << " value = " << (uint32_t)m_value << " )";
}

uint32_t
Ipv6OptionRouterAlertHeader::GetSerializedSize() const
{
    return GetLength() + 2;
}

void
Ipv6OptionRouterAlertHeader::Serialize(Buffer::Iterator start) const
{
    Buffer::Iterator i = start;

    i.WriteU8(GetType());
    i.WriteU8(GetLength());
    i.WriteHtonU16(m_value);
}

uint32_t
Ipv6OptionRouterAlertHeader::Deserialize(Buffer::Iterator start)
{
    Buffer::Iterator i = start;

    SetType(i.ReadU8());
    SetLength(i.ReadU8());
    m_value = i.ReadNtohU16();

    return GetSerializedSize();
}

Ipv6OptionHeader::Alignment
Ipv6OptionRouterAlertHeader::GetAlignment() const
{
    return Alignment{2, 0}; // 2n+0
}

} /* namespace ns3 */
