I2PTunnel data transfer

I2PTunnel.cpp

@@ -1,4 +1,7 @@
 #include <boost/bind.hpp>
+#include "base64.h"
+#include "Log.h"
+#include "NetDb.h"
 #include "I2PTunnel.h"
 
 namespace i2p
@@ -9,25 +12,128 @@ namespace stream
 		const i2p::data::LeaseSet * leaseSet): m_Socket (socket)
 	{
 		m_Stream = i2p::stream::CreateStream (*leaseSet);
+		m_Stream->Send (m_Buffer, 0, 0); // connect
+		StreamReceive ();
+		Receive ();
 	}	
 
 	I2PTunnelConnection::~I2PTunnelConnection ()
+	{
+		Terminate ();
+	}	
+
+	void I2PTunnelConnection::Terminate ()
 	{	
 		if (m_Stream)
 		{
 			m_Stream->Close ();
 			DeleteStream (m_Stream);
+			m_Stream = nullptr;
+		}
+		delete m_Socket;
+		// TODO: remove from I2PTunnel		
 	}			
 
-		delete m_Socket;
+	void I2PTunnelConnection::Receive ()
+	{
+		m_Socket->async_read_some (boost::asio::buffer(m_Buffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),                
+			boost::bind(&I2PTunnelConnection::HandleReceived, this, 
+			boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
+	}	
+	
+	void I2PTunnelConnection::HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
+	{
+		if (ecode)
+        {
+			LogPrint ("I2PTunnel read error: ", ecode.message ());
+			Terminate ();
+		}
+		else
+		{
+			if (m_Stream)
+				m_Stream->Send (m_Buffer, bytes_transferred, 0);
+			Receive ();
+		}
+	}	
+
+	void I2PTunnelConnection::HandleWrite (const boost::system::error_code& ecode)
+	{
+		StreamReceive ();
+	}
+
+	void I2PTunnelConnection::StreamReceive ()
+	{
+		if (m_Stream)
+			m_Stream->AsyncReceive (boost::asio::buffer (m_StreamBuffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),
+				boost::bind (&I2PTunnelConnection::HandleStreamReceive, this,
+					boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred),
+				I2P_TUNNEL_CONNECTION_MAX_IDLE);
+	}	
+
+	void I2PTunnelConnection::HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
+	{
+		if (ecode)
+		{
+			LogPrint ("I2PTunnel stream read error: ", ecode.message ());
+			Terminate ();
+		}
+		else
+		{
+			boost::asio::async_write (*m_Socket, boost::asio::buffer (m_StreamBuffer, bytes_transferred),
+        		boost::bind (&I2PTunnelConnection::HandleWrite, this, boost::asio::placeholders::error));
+		}
 	}
 
 	I2PClientTunnel::I2PClientTunnel (boost::asio::io_service& service, const std::string& destination, int port):
 		m_Service (service), m_Acceptor (m_Service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)),
-		m_Destination (destination), m_RemoteLeaseSet (nullptr)
+		m_Destination (destination), m_DestinationIdentHash (nullptr), m_RemoteLeaseSet (nullptr)
 	{
 	}	
 
+	I2PClientTunnel::~I2PClientTunnel ()
+	{
+		Stop ();
+	}
+	
+	void I2PClientTunnel::Start ()
+	{
+		auto pos = m_Destination.find(".b32.i2p");
+		if (pos != std::string::npos)
+		{
+			uint8_t hash[32];
+			i2p::data::Base32ToByteStream (m_Destination.c_str(), pos, hash, 32);
+			m_DestinationIdentHash = new i2p::data::IdentHash (hash);
+		}
+		else
+		{	
+			pos = m_Destination.find (".i2p");
+			if (pos != std::string::npos)
+			{
+				auto identHash = i2p::data::netdb.FindAddress (m_Destination.substr (0, pos));	
+				if (identHash)
+					m_DestinationIdentHash = new i2p::data::IdentHash (*identHash);
+			}
+		}
+		if (m_DestinationIdentHash)
+		{
+			i2p::data::netdb.Subscribe (*m_DestinationIdentHash);
+			m_RemoteLeaseSet = i2p::data::netdb.FindLeaseSet (*m_DestinationIdentHash);
+		}	
+		else
+			LogPrint ("I2PTunnel unknown destination ", m_Destination);
+		m_Acceptor.listen ();
+		Accept ();
+	}
+
+	void I2PClientTunnel::Stop ()
+	{
+		m_Acceptor.close();
+		for (auto it: m_Connections)
+			delete it;
+		m_Connections.clear ();
+		delete m_DestinationIdentHash;
+		m_DestinationIdentHash = nullptr;
+	}
 
 	void I2PClientTunnel::Accept ()
 	{
@@ -40,8 +146,13 @@ namespace stream
 	{
 		if (!ecode)
 		{
+			if (!m_RemoteLeaseSet && m_DestinationIdentHash)
+				m_RemoteLeaseSet = i2p::data::netdb.FindLeaseSet (*m_DestinationIdentHash);
 			if (m_RemoteLeaseSet)
-				new I2PTunnelConnection (socket, m_RemoteLeaseSet);
+			{	
+				auto connection = new I2PTunnelConnection (socket, m_RemoteLeaseSet);
+				m_Connections.insert (connection);
+			}
 			else
 				delete socket;
 			Accept ();

I2PTunnel.h

@@ -3,6 +3,7 @@
 
 #include <inttypes.h>
 #include <string>
+#include <set>
 #include <boost/asio.hpp>
 #include "Identity.h"
 #include "Streaming.h"
@@ -11,6 +12,8 @@ namespace i2p
 {
 namespace stream
 {
+	const size_t I2P_TUNNEL_CONNECTION_BUFFER_SIZE = 8192;
+	const int I2P_TUNNEL_CONNECTION_MAX_IDLE = 3600; // in seconds	
 	class I2PTunnelConnection
 	{
 		public:
@@ -21,6 +24,18 @@ namespace stream
 
 		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);
+
+		private:
+
+			uint8_t m_Buffer[I2P_TUNNEL_CONNECTION_BUFFER_SIZE], m_StreamBuffer[I2P_TUNNEL_CONNECTION_BUFFER_SIZE];
 			boost::asio::ip::tcp::socket * m_Socket;
 			Stream * m_Stream;
 	};	
@@ -30,6 +45,10 @@ namespace stream
 		public:
 
 			I2PClientTunnel (boost::asio::io_service& service, const std::string& destination, int port);
+			~I2PClientTunnel ();				
+	
+			void Start ();
+			void Stop ();
 
 		private:
 
@@ -41,8 +60,9 @@ namespace stream
 			boost::asio::io_service& m_Service;
 			boost::asio::ip::tcp::acceptor m_Acceptor;
 			std::string m_Destination;
-			i2p::data::IdentHash m_DestinationIdentHash;
+			const i2p::data::IdentHash * m_DestinationIdentHash;
 			const i2p::data::LeaseSet * m_RemoteLeaseSet;
+			std::set<I2PTunnelConnection *> m_Connections;
 	};	
 }		
 }