i2pd/core/tunnel/TunnelEndpoint.h

#ifndef TUNNEL_ENDPOINT_H__
#define TUNNEL_ENDPOINT_H__

#include <inttypes.h>
#include <map>
#include <string>
#include "I2NPProtocol.h"
#include "TunnelBase.h"

namespace i2p
{
namespace tunnel
{
    class TunnelEndpoint
    {   
        struct TunnelMessageBlockEx: public TunnelMessageBlock
        {
            uint8_t nextFragmentNum;
        };  

        struct Fragment
        {
            uint8_t fragmentNum;
            bool isLastFragment;
            std::shared_ptr<I2NPMessage> data;
        };  
        
        public:

            TunnelEndpoint (bool isInbound): m_IsInbound (isInbound), m_NumReceivedBytes (0) {};
            ~TunnelEndpoint ();
            size_t GetNumReceivedBytes () const { return m_NumReceivedBytes; };
            
            void HandleDecryptedTunnelDataMsg (std::shared_ptr<I2NPMessage> msg);

        private:

            void HandleFollowOnFragment (uint32_t msgID, bool isLastFragment, const TunnelMessageBlockEx& m);
            void HandleNextMessage (const TunnelMessageBlock& msg);

            void AddOutOfSequenceFragment (uint32_t msgID, uint8_t fragmentNum, bool isLastFragment, std::shared_ptr<I2NPMessage> data);
            void HandleOutOfSequenceFragment (uint32_t msgID, TunnelMessageBlockEx& msg);
            
        private:            

            std::map<uint32_t, TunnelMessageBlockEx> m_IncompleteMessages;
            std::map<uint32_t, Fragment> m_OutOfSequenceFragments;
            bool m_IsInbound;
            size_t m_NumReceivedBytes;
    };  
}       
}

#endif