split between CreateSession and CreateSessionThrough Introducer

SSU.cpp

@@ -274,12 +274,17 @@ namespace transport
 		
 	void SSUServer::CreateSession (std::shared_ptr<const i2p::data::RouterInfo> router, bool peerTest)
 	{
-		std::shared_ptr<SSUSession> session;
 		if (router)
 		{
+			if (router->UsesIntroducer ())
+			{
+				CreateSessionThroughIntroducer (router, peerTest);
+				return;
+			}
 			auto address = router->GetSSUAddress (!context.SupportsV6 ());
 			if (address)
 			{
+				std::shared_ptr<SSUSession> session;
 				boost::asio::ip::udp::endpoint remoteEndpoint (address->host, address->port);
 				auto it = m_Sessions.find (remoteEndpoint);
 				if (it != m_Sessions.end ())
@@ -296,16 +301,35 @@ namespace transport
 						std::unique_lock<std::mutex> l(m_SessionsMutex);
 						m_Sessions[remoteEndpoint] = session;
 					}
-					if (!router->UsesIntroducer ())
+					// connect 					
-					{
-						// connect directly						
 					LogPrint ("Creating new SSU session to [", i2p::data::GetIdentHashAbbreviation (router->GetIdentHash ()), "] ",
 						remoteEndpoint.address ().to_string (), ":", remoteEndpoint.port ());
 					session->Connect ();
 				}
+			}
 			else
+				LogPrint (eLogWarning, "Router ", i2p::data::GetIdentHashAbbreviation (router->GetIdentHash ()), " doesn't have SSU address");
+		}
+	}
+
+	void SSUServer::CreateSessionThroughIntroducer (std::shared_ptr<const i2p::data::RouterInfo> router, bool peerTest)
+	{
+		if (router && router->UsesIntroducer ())
+		{
+			auto address = router->GetSSUAddress (!context.SupportsV6 ());
+			if (address)
+			{
+				boost::asio::ip::udp::endpoint remoteEndpoint (address->host, address->port);
+				auto it = m_Sessions.find (remoteEndpoint);
+				// check if session if presented alredy
+				if (it != m_Sessions.end ())
 				{	
-						// connect through introducer
+					auto session = it->second;
+					if (peerTest && session->GetState () == eSessionStateEstablished)
+						session->SendPeerTest ();
+					return; 
+				}		
+				// create new session					
 				int numIntroducers = address->introducers.size ();
 				if (numIntroducers > 0)
 				{
@@ -334,6 +358,12 @@ namespace transport
 						std::unique_lock<std::mutex> l(m_SessionsMutex);
 						m_Sessions[introducerEndpoint] = introducerSession;													
 					}
+					// create session	
+					auto session = std::make_shared<SSUSession> (*this, remoteEndpoint, router, peerTest);
+					{
+						std::unique_lock<std::mutex> l(m_SessionsMutex);
+						m_Sessions[remoteEndpoint] = session;
+					}
 					// introduce
 					LogPrint ("Introduce new SSU session to [", i2p::data::GetIdentHashAbbreviation (router->GetIdentHash ()), 
 							"] through introducer ", introducer->iHost, ":", introducer->iPort);
@@ -346,13 +376,7 @@ namespace transport
 					introducerSession->Introduce (*introducer);
 				}
 				else	
-						{	
 					LogPrint (eLogWarning, "Can't connect to unreachable router. No introducers presented");				
-							std::unique_lock<std::mutex> l(m_SessionsMutex);
-							m_Sessions.erase (remoteEndpoint);
-						}	
-					}
-				}
 			}
 			else
 				LogPrint (eLogWarning, "Router ", i2p::data::GetIdentHashAbbreviation (router->GetIdentHash ()), " doesn't have SSU address");

SSU.h

@@ -41,6 +41,7 @@ namespace transport
 			void Start ();
 			void Stop ();
 			void CreateSession (std::shared_ptr<const i2p::data::RouterInfo> router, bool peerTest = false);
+			void CreateSessionThroughIntroducer (std::shared_ptr<const i2p::data::RouterInfo> router, bool peerTest = false);
 			std::shared_ptr<SSUSession> FindSession (std::shared_ptr<const i2p::data::RouterInfo> router) const;
 			std::shared_ptr<SSUSession> FindSession (const boost::asio::ip::udp::endpoint& e) const;
 			std::shared_ptr<SSUSession> GetRandomEstablishedSession (std::shared_ptr<const SSUSession> excluded);