FragmentHeader.h

/***************************************************************************
 * FragmentHeader.h -- The FragmentHeader Class represents an IPv6         *
 * Hop-by-Hop extension header.                                            *
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 ***************************************************************************/
/* This code was originally part of the Nping tool.                        */

#ifndef __FRAGMENT_HEADER_H__
#define __FRAGMENT_HEADER_H__ 1

#include "IPv6ExtensionHeader.h"

#define FRAGMENT_HEADER_LEN 8


class FragmentHeader : public IPv6ExtensionHeader {

    private:

     /* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        |  Next Header  |   Reserved    |      Fragment Offset    |Res|M|
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        |                         Identification                        |
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
        struct nping_ipv6_ext_fragment_hdr{
            u8 nh;
            u8 res1;
            u8 off_res_flag[2];
            u32 id;
        }__attribute__((__packed__));
        typedef struct nping_ipv6_ext_fragment_hdr nping_ipv6_ext_fragment_hdr_t;

        nping_ipv6_ext_fragment_hdr_t h;
        
    public:
        FragmentHeader();
        ~FragmentHeader();
        void reset();
        u8 *getBufferPointer();
        int storeRecvData(const u8 *buf, size_t len);
        int protocol_id() const;
        int validate();
        int print(FILE *output, int detail) const;

        /* Protocol specific methods */
        int setNextHeader(u8 val);
        u8 getNextHeader();

        int setOffset(u16 val);
        u16 getOffset();

        int setM(bool m_flag);
        bool getM();

        int setIdentification(u32 val);
        u32 getIdentification();


}; /* End of class FragmentHeader */

#endif