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/*
* Copyright (c) 2024, 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 SSU2_OUT_OF_SESSION_H__
#define SSU2_OUT_OF_SESSION_H__
#include <vector>
#include "SSU2Session.h"
namespace i2p
{
namespace transport
{
const int SSU2_PEER_TEST_RESEND_INTERVAL = 3000; // in milliseconds
const int SSU2_PEER_TEST_RESEND_INTERVAL_VARIANCE = 2000; // in milliseconds
const int SSU2_PEER_TEST_MAX_NUM_RESENDS = 3;
class SSU2PeerTestSession: public SSU2Session // for PeerTest msgs 5,6,7
{
public:
SSU2PeerTestSession (SSU2Server& server, uint64_t sourceConnID, uint64_t destConnID);
uint8_t GetMsgNumReceived () const { return m_MsgNumReceived; }
bool IsConnectedRecently () const { return m_IsConnectedRecently; }
void SetStatusChanged () { m_IsStatusChanged = true; }
void SendPeerTest (uint8_t msg, const uint8_t * signedData, size_t signedDataLen,
std::shared_ptr<const i2p::data::RouterInfo::Address> addr, bool delayed = false);
bool ProcessPeerTest (uint8_t * buf, size_t len) override;
void Connect () override; // outgoing
bool ProcessFirstIncomingMessage (uint64_t connID, uint8_t * buf, size_t len) override; // incoming
private:
void SendPeerTest (uint8_t msg, const uint8_t * signedData, size_t signedDataLen, bool delayed = false); // PeerTest message
void SendPeerTest (uint8_t msg); // send or resend m_SignedData
void HandlePeerTest (const uint8_t * buf, size_t len) override;
void HandleAddress (const uint8_t * buf, size_t len) override;
void ScheduleResend (uint8_t msg);
private:
uint8_t m_MsgNumReceived, m_NumResends;
bool m_IsConnectedRecently, m_IsStatusChanged;
std::vector<uint8_t> m_SignedData; // for resends
boost::asio::deadline_timer m_PeerTestResendTimer;
boost::asio::ip::udp::endpoint m_OurEndpoint; // as seen by peer
};
const int SSU2_HOLE_PUNCH_RESEND_INTERVAL = 1000; // in milliseconds
const int SSU2_HOLE_PUNCH_RESEND_INTERVAL_VARIANCE = 500; // in milliseconds
const int SSU2_HOLE_PUNCH_MAX_NUM_RESENDS = 3;
class SSU2HolePunchSession: public SSU2Session // Charlie
{
public:
SSU2HolePunchSession (SSU2Server& server, uint32_t nonce, const boost::asio::ip::udp::endpoint& remoteEndpoint,
std::shared_ptr<const i2p::data::RouterInfo::Address> addr);
void SendHolePunch (const uint8_t * relayResponseBlock, size_t relayResponseBlockLen);
bool ProcessFirstIncomingMessage (uint64_t connID, uint8_t * buf, size_t len) override; // SessionRequest
private:
void SendHolePunch ();
void ScheduleResend ();
private:
int m_NumResends;
std::vector<uint8_t> m_RelayResponseBlock;
boost::asio::deadline_timer m_HolePunchResendTimer;
};
}
}
#endif
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