olsr-header.h

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/*
 * Copyright (c) 2007 INESC Porto
 *
 * 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: Gustavo J. A. M. Carneiro  <gjc@inescporto.pt>
 */
 
#ifndef OLSR_HEADER_H
#define OLSR_HEADER_H
 
#include "olsr-repositories.h"
 
#include "ns3/header.h"
#include "ns3/ipv4-address.h"
#include "ns3/nstime.h"
 
#include <stdint.h>
#include <vector>
 
namespace ns3
{
namespace olsr
{
 
double EmfToSeconds(uint8_t emf);
uint8_t SecondsToEmf(double seconds);
 
class PacketHeader : public Header
{
  public:
    PacketHeader();
    ~PacketHeader() override;
 
    void SetPacketLength(uint16_t length)
    {
        m_packetLength = length;
    }
 
    uint16_t GetPacketLength() const
    {
        return m_packetLength;
    }
 
    void SetPacketSequenceNumber(uint16_t seqnum)
    {
        m_packetSequenceNumber = seqnum;
    }
 
    uint16_t GetPacketSequenceNumber() const
    {
        return m_packetSequenceNumber;
    }
 
  private:
    uint16_t m_packetLength;         
    uint16_t m_packetSequenceNumber; 
 
  public:
    static TypeId GetTypeId();
    TypeId GetInstanceTypeId() const override;
    void Print(std::ostream& os) const override;
    uint32_t GetSerializedSize() const override;
    void Serialize(Buffer::Iterator start) const override;
    uint32_t Deserialize(Buffer::Iterator start) override;
};
 
class MessageHeader : public Header
{
  public:
    enum MessageType
    {
        HELLO_MESSAGE = 1,
        TC_MESSAGE = 2,
        MID_MESSAGE = 3,
        HNA_MESSAGE = 4,
    };
 
    MessageHeader();
    ~MessageHeader() override;
 
    void SetMessageType(MessageType messageType)
    {
        m_messageType = messageType;
    }
 
    MessageType GetMessageType() const
    {
        return m_messageType;
    }
 
    void SetVTime(Time time)
    {
        m_vTime = SecondsToEmf(time.GetSeconds());
    }
 
    Time GetVTime() const
    {
        return Seconds(EmfToSeconds(m_vTime));
    }
 
    void SetOriginatorAddress(Ipv4Address originatorAddress)
    {
        m_originatorAddress = originatorAddress;
    }
 
    Ipv4Address GetOriginatorAddress() const
    {
        return m_originatorAddress;
    }
 
    void SetTimeToLive(uint8_t timeToLive)
    {
        m_timeToLive = timeToLive;
    }
 
    uint8_t GetTimeToLive() const
    {
        return m_timeToLive;
    }
 
    void SetHopCount(uint8_t hopCount)
    {
        m_hopCount = hopCount;
    }
 
    uint8_t GetHopCount() const
    {
        return m_hopCount;
    }
 
    void SetMessageSequenceNumber(uint16_t messageSequenceNumber)
    {
        m_messageSequenceNumber = messageSequenceNumber;
    }
 
    uint16_t GetMessageSequenceNumber() const
    {
        return m_messageSequenceNumber;
    }
 
  private:
    MessageType m_messageType;        
    uint8_t m_vTime;                  
    Ipv4Address m_originatorAddress;  
    uint8_t m_timeToLive;             
    uint8_t m_hopCount;               
    uint16_t m_messageSequenceNumber; 
    uint16_t m_messageSize;           
 
  public:
    static TypeId GetTypeId();
    TypeId GetInstanceTypeId() const override;
    void Print(std::ostream& os) const override;
    uint32_t GetSerializedSize() const override;
    void Serialize(Buffer::Iterator start) const override;
    uint32_t Deserialize(Buffer::Iterator start) override;
 
    struct Mid
    {
        std::vector<Ipv4Address> interfaceAddresses; 
        void Print(std::ostream& os) const;
        uint32_t GetSerializedSize() const;
        void Serialize(Buffer::Iterator start) const;
        uint32_t Deserialize(Buffer::Iterator start, uint32_t messageSize);
    };
 
    struct Hello
    {
        struct LinkMessage
        {
            uint8_t linkCode; 
            std::vector<Ipv4Address>
                neighborInterfaceAddresses; 
        };
 
        uint8_t hTime; 
 
        void SetHTime(Time time)
        {
            this->hTime = SecondsToEmf(time.GetSeconds());
        }
 
        Time GetHTime() const
        {
            return Seconds(EmfToSeconds(this->hTime));
        }
 
        Willingness willingness; 
        std::vector<LinkMessage> linkMessages; 
 
        void Print(std::ostream& os) const;
        uint32_t GetSerializedSize() const;
        void Serialize(Buffer::Iterator start) const;
        uint32_t Deserialize(Buffer::Iterator start, uint32_t messageSize);
    };
 
    struct Tc
    {
        std::vector<Ipv4Address> neighborAddresses; 
        uint16_t ansn;                              
 
        void Print(std::ostream& os) const;
        uint32_t GetSerializedSize() const;
        void Serialize(Buffer::Iterator start) const;
        uint32_t Deserialize(Buffer::Iterator start, uint32_t messageSize);
    };
 
    struct Hna
    {
        struct Association
        {
            Ipv4Address address; 
            Ipv4Mask mask;       
        };
 
        std::vector<Association> associations; 
 
        void Print(std::ostream& os) const;
        uint32_t GetSerializedSize() const;
        void Serialize(Buffer::Iterator start) const;
        uint32_t Deserialize(Buffer::Iterator start, uint32_t messageSize);
    };
 
  private:
    struct
    {
        Mid mid;     
        Hello hello; 
        Tc tc;       
        Hna hna;     
    } m_message;     
 
  public:
    Mid& GetMid()
    {
        if (m_messageType == 0)
        {
            m_messageType = MID_MESSAGE;
        }
        else
        {
            NS_ASSERT(m_messageType == MID_MESSAGE);
        }
        return m_message.mid;
    }
 
    Hello& GetHello()
    {
        if (m_messageType == 0)
        {
            m_messageType = HELLO_MESSAGE;
        }
        else
        {
            NS_ASSERT(m_messageType == HELLO_MESSAGE);
        }
        return m_message.hello;
    }
 
    Tc& GetTc()
    {
        if (m_messageType == 0)
        {
            m_messageType = TC_MESSAGE;
        }
        else
        {
            NS_ASSERT(m_messageType == TC_MESSAGE);
        }
        return m_message.tc;
    }
 
    Hna& GetHna()
    {
        if (m_messageType == 0)
        {
            m_messageType = HNA_MESSAGE;
        }
        else
        {
            NS_ASSERT(m_messageType == HNA_MESSAGE);
        }
        return m_message.hna;
    }
 
    const Mid& GetMid() const
    {
        NS_ASSERT(m_messageType == MID_MESSAGE);
        return m_message.mid;
    }
 
    const Hello& GetHello() const
    {
        NS_ASSERT(m_messageType == HELLO_MESSAGE);
        return m_message.hello;
    }
 
    const Tc& GetTc() const
    {
        NS_ASSERT(m_messageType == TC_MESSAGE);
        return m_message.tc;
    }
 
    const Hna& GetHna() const
    {
        NS_ASSERT(m_messageType == HNA_MESSAGE);
        return m_message.hna;
    }
};
 
inline std::ostream&
operator<<(std::ostream& os, const PacketHeader& packet)
{
    packet.Print(os);
    return os;
}
 
inline std::ostream&
operator<<(std::ostream& os, const MessageHeader& message)
{
    message.Print(os);
    return os;
}
 
typedef std::vector<MessageHeader> MessageList;
 
inline std::ostream&
operator<<(std::ostream& os, const MessageList& messages)
{
    os << "[";
    for (std::vector<MessageHeader>::const_iterator messageIter = messages.begin();
         messageIter != messages.end();
         messageIter++)
    {
        messageIter->Print(os);
        if (messageIter + 1 != messages.end())
        {
            os << ", ";
        }
    }
    os << "]";
    return os;
}
 
} // namespace olsr
} // namespace ns3
 
#endif /* OLSR_HEADER_H */