show next peer and connectivity on transit tunnels page

daemon/HTTPServer.cpp

@@ -826,7 +826,7 @@ namespace http {
 		if (i2p::tunnel::tunnels.CountTransitTunnels())
 		{
 			s << "<b>" << tr("Transit Tunnels") << ":</b><br>\r\n";
-			s << "<table><thead><th>&#8658;</th><th>ID</th><th>&#8658;</th><th>" << tr("Amount") << "</th></thead><tbody class=\"tableitem\">";
+			s << "<table><thead><th>&#8658;</th><th>ID</th><th>&#8658;</th><th>" << tr("Amount") << "</th><th>" << tr("Next") << "</th></thead><tbody class=\"tableitem\">";
 			for (const auto& it: i2p::tunnel::tunnels.GetTransitTunnels ())
 			{
 				if (std::dynamic_pointer_cast<i2p::tunnel::TransitTunnelGateway>(it))
@@ -836,7 +836,7 @@ namespace http {
 				else
 					s << "<tr><td>&#8658;</td><td>" << it->GetTunnelID () << "</td><td>&#8658;</td><td>";
 				ShowTraffic(s, it->GetNumTransmittedBytes ());
-				s << "</td></tr>\r\n";
+				s << "</td><td>" << it->GetNextPeerName () << "</td></tr>\r\n";
 			}
 			s << "</tbody></table>\r\n";
 		}

libi2pd/NTCP2.cpp

@@ -1435,6 +1435,12 @@ namespace transport
 			boost::asio::post (m_Server.GetService (), std::bind (&NTCP2Session::SendRouterInfo, shared_from_this ()));
 	}
 
+	i2p::data::RouterInfo::SupportedTransports NTCP2Session::GetTransportType () const
+	{
+		if (m_RemoteEndpoint.address ().is_v4 ()) return i2p::data::RouterInfo::eNTCP2V4;
+		return i2p::util::net::IsYggdrasilAddress (m_RemoteEndpoint.address ()) ? i2p::data::RouterInfo::eNTCP2V6Mesh : i2p::data::RouterInfo::eNTCP2V6;
+	}	
+		
 	NTCP2Server::NTCP2Server ():
 		RunnableServiceWithWork ("NTCP2"), m_TerminationTimer (GetService ()),
 		m_ProxyType(eNoProxy), m_Resolver(GetService ()),

libi2pd/NTCP2.h

@@ -147,6 +147,7 @@ namespace transport
 			void SetRemoteEndpoint (const boost::asio::ip::tcp::endpoint& ep) { m_RemoteEndpoint = ep; };
 
 			bool IsEstablished () const override { return m_IsEstablished; };
+			i2p::data::RouterInfo::SupportedTransports GetTransportType () const override;
 			bool IsTerminated () const { return m_IsTerminated; };
 
 			void ClientLogin (); // Alice

libi2pd/RouterInfo.cpp

@@ -1195,6 +1195,19 @@ namespace data
 				return false;
 		}
 	}
+
+	std::string RouterInfo::GetTransportName (SupportedTransports tr)
+	{
+		switch (tr)
+		{
+			case eNTCP2V4: return "NTCP2V4";
+			case eNTCP2V6: return "NTCP2V6";
+			case eSSU2V4: return "SSU2V4";
+			case eSSU2V6: return "SSU2V6";
+			case eNTCP2V6Mesh: return "Mesh";
+			default: return "";
+		}
+	}	
 		
 	void LocalRouterInfo::CreateBuffer (const PrivateKeys& privateKeys)
 	{

libi2pd/RouterInfo.h

@@ -363,6 +363,10 @@ namespace data
 			int m_Version;
 			Congestion m_Congestion;
 			mutable std::shared_ptr<RouterProfile> m_Profile;
+
+		public:
+
+			static std::string GetTransportName (SupportedTransports tr);
 	};
 
 	class LocalRouterInfo: public RouterInfo

libi2pd/SSU2Session.cpp

@@ -3114,5 +3114,10 @@ namespace transport
 		else if (!sent && !m_SentPackets.empty ()) // if only acks received, nothing sent and we still have something to resend
 			Resend (i2p::util::GetMillisecondsSinceEpoch ()); // than right time to resend
 	}
+
+	i2p::data::RouterInfo::SupportedTransports SSU2Session::GetTransportType () const
+	{
+		return m_RemoteEndpoint.address ().is_v4 () ? i2p::data::RouterInfo::eSSU2V4 : i2p::data::RouterInfo::eSSU2V6;
+	}	
 }
 }

libi2pd/SSU2Session.h

@@ -267,6 +267,7 @@ namespace transport
 			size_t Resend (uint64_t ts); // return number of resent packets
 			uint64_t GetLastResendTime () const { return m_LastResendTime; };
 			bool IsEstablished () const override { return m_State == eSSU2SessionStateEstablished; };
+			i2p::data::RouterInfo::SupportedTransports GetTransportType () const override;
 			uint64_t GetConnID () const { return m_SourceConnID; };
 			SSU2SessionState GetState () const { return m_State; };
 			void SetState (SSU2SessionState state) { m_State = state; };

libi2pd/TransitTunnel.cpp

@@ -10,6 +10,8 @@
 #include "I2PEndian.h"
 #include "Crypto.h"
 #include "Log.h"
+#include "Identity.h"
+#include "RouterInfo.h"
 #include "RouterContext.h"
 #include "I2NPProtocol.h"
 #include "Garlic.h"
@@ -41,6 +43,21 @@ namespace tunnel
 		i2p::transport::transports.UpdateTotalTransitTransmittedBytes (TUNNEL_DATA_MSG_SIZE);
 	}
 
+	std::string TransitTunnel::GetNextPeerName () const
+	{
+		return i2p::data::GetIdentHashAbbreviation (GetNextIdentHash ());
+	}	
+
+	void TransitTunnel::SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg)
+	{
+		LogPrint (eLogError, "TransitTunnel: We are not a gateway for ", GetTunnelID ());
+	}
+
+	void TransitTunnel::HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg)
+	{
+		LogPrint (eLogError, "TransitTunnel: Incoming tunnel message is not supported ", GetTunnelID ());
+	}
+		
 	TransitTunnelParticipant::~TransitTunnelParticipant ()
 	{
 	}
@@ -67,16 +84,18 @@ namespace tunnel
 		}
 	}
 
-	void TransitTunnel::SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg)
+	std::string TransitTunnelParticipant::GetNextPeerName () const
 	{
-		LogPrint (eLogError, "TransitTunnel: We are not a gateway for ", GetTunnelID ());
-	}
-
-	void TransitTunnel::HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg)
-	{
-		LogPrint (eLogError, "TransitTunnel: Incoming tunnel message is not supported ", GetTunnelID ());
-	}
-
+		if (m_Sender)
+		{
+			auto transport = m_Sender->GetCurrentTransport ();
+			if (transport)
+				return TransitTunnel::GetNextPeerName () + "-" + 
+					i2p::data::RouterInfo::GetTransportName (transport->GetTransportType ());
+		}	
+		return TransitTunnel::GetNextPeerName ();
+	}	
+		
 	void TransitTunnelGateway::SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg)
 	{
 		TunnelMessageBlock block;
@@ -92,6 +111,19 @@ namespace tunnel
 		m_Gateway.SendBuffer ();
 	}
 
+	std::string TransitTunnelGateway::GetNextPeerName () const
+	{
+		const auto& sender = m_Gateway.GetSender ();
+		if (sender)
+		{
+			auto transport = sender->GetCurrentTransport ();
+			if (transport)
+				return TransitTunnel::GetNextPeerName () + "-" + 
+					i2p::data::RouterInfo::GetTransportName (transport->GetTransportType ());
+		}	
+		return TransitTunnel::GetNextPeerName ();
+	}	
+		
 	void TransitTunnelEndpoint::HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg)
 	{
 		auto newMsg = CreateEmptyTunnelDataMsg (true);

libi2pd/TransitTunnel.h

@@ -33,11 +33,13 @@ namespace tunnel
 				const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey);
 
 			virtual size_t GetNumTransmittedBytes () const { return 0; };
+			virtual std::string GetNextPeerName () const;
 
 			// implements TunnelBase
 			void SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg) override;
 			void HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg) override;
 			void EncryptTunnelMsg (std::shared_ptr<const I2NPMessage> in, std::shared_ptr<I2NPMessage> out) override;
+		
 		private:
 
 			i2p::crypto::AESKey m_LayerKey, m_IVKey;
@@ -56,6 +58,7 @@ namespace tunnel
 			~TransitTunnelParticipant ();
 
 			size_t GetNumTransmittedBytes () const override { return m_NumTransmittedBytes; };
+			std::string GetNextPeerName () const override;
 			void HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg) override;
 			void FlushTunnelDataMsgs () override;
 
@@ -79,7 +82,8 @@ namespace tunnel
 			void SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg) override;
 			void FlushTunnelDataMsgs () override;
 			size_t GetNumTransmittedBytes () const override { return m_Gateway.GetNumSentBytes (); };
-
+			std::string GetNextPeerName () const override;
+			
 		private:
 
 			std::mutex m_SendMutex;
@@ -97,10 +101,11 @@ namespace tunnel
 				m_Endpoint (false) {}; // transit endpoint is always outbound
 
 			void Cleanup () override { m_Endpoint.Cleanup (); }
-
+		
 			void HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg) override;
 			size_t GetNumTransmittedBytes () const override { return m_Endpoint.GetNumReceivedBytes (); }
-
+			std::string GetNextPeerName () const override { return ""; }
+			
 		private:
 
 			TunnelEndpoint m_Endpoint;

libi2pd/TransportSession.h

@@ -151,6 +151,7 @@ namespace transport
 			};
 			virtual void SendI2NPMessages (std::list<std::shared_ptr<I2NPMessage> >& msgs) = 0;
 			virtual bool IsEstablished () const = 0;
+			virtual i2p::data::RouterInfo::SupportedTransports GetTransportType () const = 0;
 
 		private:
 

libi2pd/TunnelBase.cpp

@@ -60,5 +60,11 @@ namespace tunnel
 		msgs.swap (msgs1);
 		SendMessagesTo (to, std::move (msgs1));
 	}	
+
+	void TunnelTransportSender::Reset ()
+	{
+		m_CurrentTransport.reset ();
+		m_PendingTransport = std::future<std::shared_ptr<i2p::transport::TransportSession> >();
+	}	
 }
 }

libi2pd/TunnelBase.h

@@ -93,6 +93,9 @@ namespace tunnel
 
 			void SendMessagesTo (const i2p::data::IdentHash& to, std::list<std::shared_ptr<I2NPMessage> >&& msgs);
 			void SendMessagesTo (const i2p::data::IdentHash& to, std::list<std::shared_ptr<I2NPMessage> >& msgs); // send and clear
+
+			std::shared_ptr<const i2p::transport::TransportSession> GetCurrentTransport () const { return m_CurrentTransport.lock (); }
+			void Reset ();
 			
 		private:
 			

libi2pd/TunnelGateway.h

@@ -51,6 +51,7 @@ namespace tunnel
 			void PutTunnelDataMsg (const TunnelMessageBlock& block);
 			void SendBuffer ();
 			size_t GetNumSentBytes () const { return m_NumSentBytes; };
+			const std::unique_ptr<TunnelTransportSender>& GetSender () const { return m_Sender; };
 
 		private: