close connection to first hop of declined tunnel

I2NPProtocol.cpp

@@ -359,6 +359,7 @@ namespace i2p
 			else
 			{	
 				LogPrint ("Outbound tunnel ", tunnel->GetTunnelID (), " has been declined");
+				i2p::transports.CloseSession (tunnel->GetTunnelConfig ()->GetFirstHop ()->router);
 				delete tunnel;
 			}	
 		}	

Transports.cpp

@@ -263,6 +263,23 @@ namespace i2p
 		}	
 	}	
 
+	void Transports::CloseSession (const i2p::data::RouterInfo * router)
+	{
+		if (!router) return;
+		m_Service.post (boost::bind (&Transports::PostCloseSession, this, router));    
+	}	
+
+	void Transports::PostCloseSession (const i2p::data::RouterInfo * router)
+	{
+		auto ssuSession = m_SSUServer ? m_SSUServer->FindSession (router) : nullptr;
+		if (ssuSession) // try SSU first
+		{	
+			m_SSUServer->DeleteSession (ssuSession);
+			LogPrint ("SSU session closed");	
+		}	
+		// TODO: delete NTCP
+	}	
+		
 	void Transports::DetectExternalIP ()
 	{
 		for (int i = 0; i < 5; i ++)

Transports.h

@@ -63,12 +63,14 @@ namespace i2p
 			i2p::ntcp::NTCPSession * FindNTCPSession (const i2p::data::IdentHash& ident);
 
 			void SendMessage (const i2p::data::IdentHash& ident, i2p::I2NPMessage * msg);
+			void CloseSession (const i2p::data::RouterInfo * router);
 			
 		private:
 
 			void Run ();
 			void HandleAccept (i2p::ntcp::NTCPServerConnection * conn, const boost::system::error_code& error);
 			void PostMessage (const i2p::data::IdentHash& ident, i2p::I2NPMessage * msg);
+			void PostCloseSession (const i2p::data::RouterInfo * router);
 			
 			void DetectExternalIP ();
 			

Tunnel.cpp

@@ -361,10 +361,12 @@ namespace tunnel
 	void Tunnels::ManageTunnels ()
 	{
 		// check pending tunnel. if something is still there, wipe it out
-		// because it wouldn't be reponded anyway
+		// because it wouldn't be responded anyway
 		for (auto& it : m_PendingTunnels)
 		{	
 			LogPrint ("Pending tunnel build request ", it.first, " has not been responded. Deleted");
+			if (it.second->GetTunnelConfig ()->GetFirstHop ()->isGateway) // outbound
+				i2p::transports.CloseSession (it.second->GetTunnelConfig ()->GetFirstHop ()->router);
 			delete it.second;
 		}	
 		m_PendingTunnels.clear ();