tcp-option.h

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/*
 * Copyright (c) 2011 Adrian Sai-wah Tam
 *
 * 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: Adrian Sai-wah Tam <adrian.sw.tam@gmail.com>
 */
 
#ifndef TCP_OPTION_H
#define TCP_OPTION_H
 
#include "ns3/buffer.h"
#include "ns3/object-factory.h"
#include "ns3/object.h"
 
#include <stdint.h>
 
namespace ns3
{
 
class TcpOption : public Object
{
  public:
    TcpOption();
    ~TcpOption() override;
 
    static TypeId GetTypeId();
 
    TypeId GetInstanceTypeId() const override;
 
    enum Kind
    {
        // Remember to extend IsKindKnown() with new value, when adding values here
        //
        END = 0,           
        NOP = 1,           
        MSS = 2,           
        WINSCALE = 3,      
        SACKPERMITTED = 4, 
        SACK = 5,          
        TS = 8,            
        UNKNOWN = 255      
    };
 
    virtual void Print(std::ostream& os) const = 0;
    virtual void Serialize(Buffer::Iterator start) const = 0;
 
    virtual uint32_t Deserialize(Buffer::Iterator start) = 0;
 
    virtual uint8_t GetKind() const = 0;
    virtual uint32_t GetSerializedSize() const = 0;
 
    static Ptr<TcpOption> CreateOption(uint8_t kind);
 
    static bool IsKindKnown(uint8_t kind);
};
 
class TcpOptionUnknown : public TcpOption
{
  public:
    TcpOptionUnknown();
    ~TcpOptionUnknown() override;
 
    static TypeId GetTypeId();
    TypeId GetInstanceTypeId() const override;
 
    void Print(std::ostream& os) const override;
    void Serialize(Buffer::Iterator start) const override;
    uint32_t Deserialize(Buffer::Iterator start) override;
 
    uint8_t GetKind() const override;
    uint32_t GetSerializedSize() const override;
 
  private:
    uint8_t m_kind;        
    uint32_t m_size;       
    uint8_t m_content[40]; 
};
 
} // namespace ns3
 
#endif /* TCP_OPTION */