mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-17 21:26:04 +00:00
111 lines
3.0 KiB
C++
111 lines
3.0 KiB
C++
/*
|
|
* Copyright (c) 2022, 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_H__
|
|
#define SSU2_H__
|
|
|
|
#include <memory>
|
|
#include <map>
|
|
#include <unordered_map>
|
|
#include <boost/asio.hpp>
|
|
#include "Crypto.h"
|
|
#include "RouterInfo.h"
|
|
#include "TransportSession.h"
|
|
|
|
namespace i2p
|
|
{
|
|
namespace transport
|
|
{
|
|
const int SSU2_TERMINATION_TIMEOUT = 330; // 5.5 minutes
|
|
const size_t SSU2_SOCKET_RECEIVE_BUFFER_SIZE = 0x1FFFF; // 128K
|
|
const size_t SSU2_SOCKET_SEND_BUFFER_SIZE = 0x1FFFF; // 128K
|
|
|
|
enum SSU2MessageType
|
|
{
|
|
eSSU2SessionRequest = 0,
|
|
eSSU2SessionCreated = 1
|
|
};
|
|
|
|
class SSU2Server;
|
|
class SSU2Session: public TransportSession, public std::enable_shared_from_this<SSU2Session>
|
|
{
|
|
union Header
|
|
{
|
|
uint64_t ll[2];
|
|
uint8_t buf[16];
|
|
struct
|
|
{
|
|
uint64_t connID;
|
|
uint8_t packetNum[4];
|
|
uint8_t type;
|
|
uint8_t flags[3];
|
|
} h;
|
|
};
|
|
|
|
public:
|
|
|
|
SSU2Session (SSU2Server& server, std::shared_ptr<const i2p::data::RouterInfo> in_RemoteRouter = nullptr,
|
|
std::shared_ptr<const i2p::data::RouterInfo::Address> addr = nullptr, bool peerTest = false);
|
|
~SSU2Session ();
|
|
|
|
void SetRemoteEndpoint (const boost::asio::ip::udp::endpoint& ep) { m_RemoteEndpoint = ep; };
|
|
|
|
void Done () override {};
|
|
void SendI2NPMessages (const std::vector<std::shared_ptr<I2NPMessage> >& msgs) override {};
|
|
|
|
void ProcessSessionRequest (uint64_t connID, uint8_t * buf, size_t len);
|
|
bool ProcessSessionCreated (uint8_t * buf, size_t len);
|
|
|
|
private:
|
|
|
|
void SendSessionRequest ();
|
|
void SendSessionCreated (const uint8_t * X);
|
|
|
|
private:
|
|
|
|
SSU2Server& m_Server;
|
|
std::shared_ptr<i2p::crypto::X25519Keys> m_EphemeralKeys;
|
|
std::unique_ptr<i2p::crypto::NoiseSymmetricState> m_NoiseState;
|
|
std::shared_ptr<const i2p::data::RouterInfo::Address> m_Address;
|
|
boost::asio::ip::udp::endpoint m_RemoteEndpoint;
|
|
uint64_t m_DestConnID, m_SourceConnID;
|
|
};
|
|
|
|
class SSU2Server: private i2p::util::RunnableServiceWithWork
|
|
{
|
|
public:
|
|
|
|
SSU2Server ();
|
|
~SSU2Server () {};
|
|
|
|
void Start ();
|
|
void Stop ();
|
|
boost::asio::io_service& GetService () { return GetIOService (); };
|
|
|
|
void AddSession (uint64_t connID, std::shared_ptr<SSU2Session> session);
|
|
void AddPendingOutgoingSession (const boost::asio::ip::udp::endpoint& ep, std::shared_ptr<SSU2Session> session);
|
|
|
|
void Send (const uint8_t * header, size_t headerLen, const uint8_t * headerX, size_t headerXLen,
|
|
const uint8_t * payload, size_t payloadLen, const boost::asio::ip::udp::endpoint& to);
|
|
|
|
private:
|
|
|
|
void OpenSocket (int port);
|
|
void ProcessNextPacket (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& senderEndpoint);
|
|
|
|
private:
|
|
|
|
boost::asio::ip::udp::socket m_Socket;
|
|
std::unordered_map<uint64_t, std::shared_ptr<SSU2Session> > m_Sessions;
|
|
std::map<boost::asio::ip::udp::endpoint, std::shared_ptr<SSU2Session> > m_PendingOutgoingSessions;
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|