i2pd/libi2pd/TunnelEndpoint.h
R4SAS 8bae4975fb add copyright headers
Signed-off-by: R4SAS <r4sas@i2pmail.org>
2020-05-22 18:14:53 +00:00

66 lines
1.7 KiB
C++

/*
* Copyright (c) 2013-2020, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*/
#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
{
uint64_t receiveTime; // milliseconds since epoch
uint8_t nextFragmentNum;
};
struct Fragment
{
bool isLastFragment;
std::shared_ptr<I2NPMessage> data;
uint64_t receiveTime; // milliseconds since epoch
};
public:
TunnelEndpoint (bool isInbound): m_IsInbound (isInbound), m_NumReceivedBytes (0) {};
~TunnelEndpoint ();
size_t GetNumReceivedBytes () const { return m_NumReceivedBytes; };
void Cleanup ();
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);
bool ConcatNextOutOfSequenceFragment (uint32_t msgID, TunnelMessageBlockEx& msg); // true if something added
void HandleOutOfSequenceFragments (uint32_t msgID, TunnelMessageBlockEx& msg);
private:
std::map<uint32_t, TunnelMessageBlockEx> m_IncompleteMessages;
std::map<std::pair<uint32_t, uint8_t>, Fragment> m_OutOfSequenceFragments; // (msgID, fragment#)->fragment
bool m_IsInbound;
size_t m_NumReceivedBytes;
};
}
}
#endif