mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2025-07-01 10:14:36 +02:00
219 lines
7.3 KiB
C++
219 lines
7.3 KiB
C++
/*
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* Copyright (c) 2013-2020, 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 I2PSERVICE_H__
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#define I2PSERVICE_H__
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#include <atomic>
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#include <mutex>
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#include <unordered_set>
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#include <memory>
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#include <boost/asio.hpp>
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#include "Destination.h"
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#include "Identity.h"
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#include "AddressBook.h"
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namespace i2p {
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namespace client {
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class I2PServiceHandler;
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class I2PService : public std::enable_shared_from_this<I2PService> {
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public:
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typedef std::function<void(const boost::system::error_code &)> ReadyCallback;
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public:
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I2PService(std::shared_ptr <ClientDestination> localDestination = nullptr);
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I2PService(i2p::data::SigningKeyType kt);
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virtual ~I2PService();
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inline void AddHandler(std::shared_ptr <I2PServiceHandler> conn) {
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std::unique_lock <std::mutex> l(m_HandlersMutex);
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m_Handlers.insert(conn);
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}
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inline void RemoveHandler(std::shared_ptr <I2PServiceHandler> conn) {
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std::unique_lock <std::mutex> l(m_HandlersMutex);
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m_Handlers.erase(conn);
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}
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void ClearHandlers();
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void SetConnectTimeout(uint32_t timeout);
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void AddReadyCallback(ReadyCallback cb);
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inline std::shared_ptr <ClientDestination> GetLocalDestination() { return m_LocalDestination; }
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inline std::shared_ptr<const ClientDestination> GetLocalDestination() const { return m_LocalDestination; }
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inline void SetLocalDestination(std::shared_ptr <ClientDestination> dest) {
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if (m_LocalDestination) m_LocalDestination->Release();
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if (dest) dest->Acquire();
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m_LocalDestination = dest;
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}
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void CreateStream(StreamRequestComplete streamRequestComplete, const std::string &dest, int port = 0);
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void CreateStream(StreamRequestComplete complete, std::shared_ptr<const Address> address, int port);
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inline boost::asio::io_service &GetService() { return m_LocalDestination->GetService(); }
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virtual void Start() = 0;
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virtual void Stop() = 0;
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virtual const char *GetName() { return "Generic I2P Service"; }
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private:
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void TriggerReadyCheckTimer();
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void HandleReadyCheckTimer(const boost::system::error_code &ec);
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private:
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std::shared_ptr <ClientDestination> m_LocalDestination;
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std::unordered_set <std::shared_ptr<I2PServiceHandler>> m_Handlers;
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std::mutex m_HandlersMutex;
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std::vector <std::pair<ReadyCallback, uint32_t>> m_ReadyCallbacks;
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boost::asio::deadline_timer m_ReadyTimer;
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bool m_ReadyTimerTriggered;
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uint32_t m_ConnectTimeout;
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const size_t NEVER_TIMES_OUT = 0;
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public:
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bool isUpdated; // transient, used during reload only
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};
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/*Simple interface for I2PHandlers, allows detection of finalization amongst other things */
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class I2PServiceHandler {
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public:
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I2PServiceHandler(I2PService *parent) : m_Service(parent), m_Dead(false) {}
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virtual ~I2PServiceHandler() {}
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//If you override this make sure you call it from the children
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virtual void Handle() {}; //Start handling the socket
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void Terminate() { Kill(); };
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protected:
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// Call when terminating or handing over to avoid race conditions
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inline bool Kill() { return m_Dead.exchange(true); }
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// Call to know if the handler is dead
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inline bool Dead() { return m_Dead; }
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// Call when done to clean up (make sure Kill is called first)
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inline void Done(std::shared_ptr <I2PServiceHandler> me) { if (m_Service) m_Service->RemoveHandler(me); }
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// Call to talk with the owner
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inline I2PService *GetOwner() { return m_Service; }
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private:
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I2PService *m_Service;
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std::atomic<bool> m_Dead; //To avoid cleaning up multiple times
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};
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const size_t TCP_IP_PIPE_BUFFER_SIZE = 8192 * 8;
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// bidirectional pipe for 2 tcp/ip sockets
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class TCPIPPipe : public I2PServiceHandler, public std::enable_shared_from_this<TCPIPPipe> {
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public:
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TCPIPPipe(I2PService *owner, std::shared_ptr <boost::asio::ip::tcp::socket> upstream,
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std::shared_ptr <boost::asio::ip::tcp::socket> downstream);
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~TCPIPPipe();
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void Start();
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protected:
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void Terminate();
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void AsyncReceiveUpstream();
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void AsyncReceiveDownstream();
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void HandleUpstreamReceived(const boost::system::error_code &ecode, std::size_t bytes_transferred);
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void HandleDownstreamReceived(const boost::system::error_code &ecode, std::size_t bytes_transferred);
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void HandleUpstreamWrite(const boost::system::error_code &ecode);
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void HandleDownstreamWrite(const boost::system::error_code &ecode);
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void UpstreamWrite(size_t len);
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void DownstreamWrite(size_t len);
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private:
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uint8_t m_upstream_to_down_buf[TCP_IP_PIPE_BUFFER_SIZE], m_downstream_to_up_buf[TCP_IP_PIPE_BUFFER_SIZE];
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uint8_t m_upstream_buf[TCP_IP_PIPE_BUFFER_SIZE], m_downstream_buf[TCP_IP_PIPE_BUFFER_SIZE];
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std::shared_ptr <boost::asio::ip::tcp::socket> m_up, m_down;
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};
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/* TODO: support IPv6 too */
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//This is a service that listens for connections on the IP network and interacts with I2P
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class TCPIPAcceptor : public I2PService {
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public:
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TCPIPAcceptor(const std::string &address, int port,
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std::shared_ptr <ClientDestination> localDestination = nullptr) :
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I2PService(localDestination),
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m_LocalEndpoint(boost::asio::ip::address::from_string(address), port),
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m_Timer(GetService()) {}
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TCPIPAcceptor(const std::string &address, int port, i2p::data::SigningKeyType kt) :
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I2PService(kt),
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m_LocalEndpoint(boost::asio::ip::address::from_string(address), port),
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m_Timer(GetService()) {}
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virtual ~TCPIPAcceptor() { TCPIPAcceptor::Stop(); }
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//If you override this make sure you call it from the children
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void Start();
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//If you override this make sure you call it from the children
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void Stop();
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const boost::asio::ip::tcp::endpoint &GetLocalEndpoint() const { return m_LocalEndpoint; };
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virtual const char *GetName() { return "Generic TCP/IP accepting daemon"; }
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protected:
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virtual std::shared_ptr <I2PServiceHandler>
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CreateHandler(std::shared_ptr <boost::asio::ip::tcp::socket> socket) = 0;
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private:
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void Accept();
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void
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HandleAccept(const boost::system::error_code &ecode, std::shared_ptr <boost::asio::ip::tcp::socket> socket);
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boost::asio::ip::tcp::endpoint m_LocalEndpoint;
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std::unique_ptr <boost::asio::ip::tcp::acceptor> m_Acceptor;
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boost::asio::deadline_timer m_Timer;
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};
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}
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}
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#endif
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