fixed race condition

NTCPSession.cpp

@@ -627,6 +627,11 @@ namespace transport
 	}	
 
 	void NTCPSession::SendI2NPMessage (I2NPMessage * msg)
+	{
+		m_Server.GetService ().post (std::bind (&NTCPSession::PostI2NPMessage, shared_from_this (), msg));  
+	}	
+
+	void NTCPSession::PostI2NPMessage (I2NPMessage * msg)
 	{
 		if (msg)
 		{
@@ -634,9 +639,9 @@ namespace transport
 				Send (msg);
 			else
 				m_DelayedMessages.push_back (msg);	
-		}	
+		}
 	}	
-
+		
 	void NTCPSession::ScheduleTermination ()
 	{
 		m_TerminationTimer.cancel ();

NTCPSession.h

@@ -67,6 +67,7 @@ namespace transport
 			
 		protected:
 
+			void PostI2NPMessage (I2NPMessage * msg);
 			void Connected ();
 			void SendTimeSyncMessage ();
 			void SetIsEstablished (bool isEstablished) { m_IsEstablished = isEstablished; }

SSU.h

@@ -38,7 +38,8 @@ namespace transport
 			void DeleteSession (std::shared_ptr<SSUSession> session);
 			void DeleteAllSessions ();			
 
-			boost::asio::io_service& GetService () { return m_Socket.get_io_service(); };
+			boost::asio::io_service& GetService () { return m_Service; };
+			boost::asio::io_service& GetServiceV6 () { return m_ServiceV6; };
 			const boost::asio::ip::udp::endpoint& GetEndpoint () const { return m_Endpoint; };			
 			void Send (const uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& to);
 			void AddRelay (uint32_t tag, const boost::asio::ip::udp::endpoint& relay);

SSUSession.cpp

@@ -828,7 +828,8 @@ namespace transport
 
 	void SSUSession::SendI2NPMessage (I2NPMessage * msg)
 	{
-		m_Server.GetService ().post (std::bind (&SSUSession::PostI2NPMessage, shared_from_this (), msg));    
+		boost::asio::io_service& service = IsV6 () ? m_Server.GetServiceV6 () : m_Server.GetService ();
+		service.post (std::bind (&SSUSession::PostI2NPMessage, shared_from_this (), msg));    
 	}	
 
 	void SSUSession::PostI2NPMessage (I2NPMessage * msg)