mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-10 08:00:38 +03:00
110 lines
2.6 KiB
C++
110 lines
2.6 KiB
C++
/*
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* Copyright (c) 2022, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#ifndef SSU2_H__
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#define SSU2_H__
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#include <memory>
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#include <map>
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#include <unordered_map>
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#include <boost/asio.hpp>
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#include "Crypto.h"
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#include "RouterInfo.h"
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#include "TransportSession.h"
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namespace i2p
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{
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namespace transport
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{
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const int SSU2_TERMINATION_TIMEOUT = 330; // 5.5 minutes
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const size_t SSU2_SOCKET_RECEIVE_BUFFER_SIZE = 0x1FFFF; // 128K
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const size_t SSU2_SOCKET_SEND_BUFFER_SIZE = 0x1FFFF; // 128K
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enum SSU2MessageType
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{
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eSSU2SessionRequest = 0,
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eSSU2SessionCreated = 1
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};
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class SSU2Server;
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class SSU2Session: public TransportSession, public std::enable_shared_from_this<SSU2Session>
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{
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union Header2
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{
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uint64_t ll;
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uint8_t buf[8];
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struct
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{
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uint8_t packetNum[4];
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uint8_t type;
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uint8_t flags[3];
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} h;
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};
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union Header
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{
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uint64_t ll[2];
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uint8_t buf[16];
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struct
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{
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uint64_t connID;
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Header2 h2;
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} h;
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};
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public:
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SSU2Session (SSU2Server& server, std::shared_ptr<const i2p::data::RouterInfo> in_RemoteRouter = nullptr,
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std::shared_ptr<const i2p::data::RouterInfo::Address> addr = nullptr, bool peerTest = false);
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~SSU2Session ();
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bool ProcessSessionCreated (uint8_t * buf, size_t len);
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private:
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void SendSessionRequest ();
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private:
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SSU2Server& m_Server;
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std::shared_ptr<i2p::crypto::X25519Keys> m_EphemeralKeys;
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std::unique_ptr<i2p::crypto::NoiseSymmetricState> m_NoiseState;
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std::shared_ptr<const i2p::data::RouterInfo::Address> m_Address;
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uint64_t m_DestConnID, m_SourceConnID;
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};
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class SSU2Server
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{
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public:
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SSU2Server (int port);
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~SSU2Server () {};
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void AddSession (uint64_t connID, std::shared_ptr<SSU2Session> session);
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void AddPendingOutgoingSession (const boost::asio::ip::udp::endpoint& ep, std::shared_ptr<SSU2Session> session);
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void Send (const uint8_t * header, size_t headerLen, const uint8_t * headerX, size_t headerXLen,
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const uint8_t * payload, size_t payloadLen, const boost::asio::ip::udp::endpoint& to);
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private:
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void OpenSocket ();
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void ProcessNextPacket (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& senderEndpoint);
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private:
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boost::asio::io_service m_Service;
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boost::asio::ip::udp::socket m_Socket;
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boost::asio::ip::udp::endpoint m_Endpoint;
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std::unordered_map<uint64_t, std::shared_ptr<SSU2Session> > m_Sessions;
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std::map<boost::asio::ip::udp::endpoint, std::shared_ptr<SSU2Session> > m_PendingOutgoingSessions;
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};
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}
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}
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#endif
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