i2pd/I2PTunnel.h

#ifndef I2PTUNNEL_H__
#define I2PTUNNEL_H__

#include <inttypes.h>
#include <string>
#include <set>
#include <memory>
#include <boost/asio.hpp>
#include "Identity.h"
#include "Destination.h"
#include "Streaming.h"
#include "I2PService.h"

namespace i2p
{
namespace client
{
	const size_t I2P_TUNNEL_CONNECTION_BUFFER_SIZE = 8192;
	const int I2P_TUNNEL_CONNECTION_MAX_IDLE = 3600; // in seconds	
	const int I2P_TUNNEL_DESTINATION_REQUEST_TIMEOUT = 10; // in seconds


	class I2PTunnelConnection: public I2PServiceHandler, public std::enable_shared_from_this<I2PTunnelConnection>
	{
		public:

			I2PTunnelConnection (I2PService * owner, boost::asio::ip::tcp::socket * socket,
				const i2p::data::LeaseSet * leaseSet); // to I2P
			I2PTunnelConnection (I2PService * owner, boost::asio::ip::tcp::socket * socket,
				std::shared_ptr<i2p::stream::Stream> stream); // to I2P using simplified API :)
			I2PTunnelConnection (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,  boost::asio::ip::tcp::socket * socket, 
				const boost::asio::ip::tcp::endpoint& target, bool quiet = true); // from I2P
			~I2PTunnelConnection ();
			void I2PConnect (const uint8_t * msg = nullptr, size_t len = 0);
			void Connect ();
			
		private:

			void Terminate ();	

			void Receive ();
			void HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred);	
			void HandleWrite (const boost::system::error_code& ecode);	

			void StreamReceive ();
			void HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred);
			void HandleConnect (const boost::system::error_code& ecode);

		private:

			uint8_t m_Buffer[I2P_TUNNEL_CONNECTION_BUFFER_SIZE], m_StreamBuffer[I2P_TUNNEL_CONNECTION_BUFFER_SIZE];
			boost::asio::ip::tcp::socket * m_Socket;
			std::shared_ptr<i2p::stream::Stream> m_Stream;
			boost::asio::ip::tcp::endpoint m_RemoteEndpoint;
			bool m_IsQuiet; // don't send destination
	};

	class I2PClientTunnel: public I2PService
	{
		public:

			I2PClientTunnel (const std::string& destination, int port, ClientDestination * localDestination = nullptr);
			~I2PClientTunnel ();				
	
			void Start ();
			void Stop ();

		private:

			const i2p::data::IdentHash * GetIdentHash ();
			void Accept ();
			void HandleAccept (const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket);
			void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream, boost::asio::ip::tcp::socket * socket);

		private:

			boost::asio::ip::tcp::acceptor m_Acceptor;
			boost::asio::deadline_timer m_Timer;
			std::string m_Destination;
			const i2p::data::IdentHash * m_DestinationIdentHash;
	};	

	class I2PServerTunnel: public I2PService
	{
		public:

			I2PServerTunnel (const std::string& address, int port, ClientDestination * localDestination);	

			void Start ();
			void Stop ();

		private:

			void Accept ();
			void HandleAccept (std::shared_ptr<i2p::stream::Stream> stream);

		private:

			boost::asio::ip::tcp::endpoint m_Endpoint;		
	};
}
}	

#endif