process TunnelGateway message in tunnel thread

I2NPProtocol.cpp

@@ -466,35 +466,6 @@ namespace i2p
 		return msg;
 	}	
 
-	void HandleTunnelGatewayMsg (I2NPMessage * msg)
-	{		
-		const uint8_t * payload = msg->GetPayload ();
-		uint32_t tunnelID = bufbe32toh(payload + TUNNEL_GATEWAY_HEADER_TUNNELID_OFFSET);
-		uint16_t len = bufbe16toh(payload + TUNNEL_GATEWAY_HEADER_LENGTH_OFFSET);
-		// we make payload as new I2NP message to send
-		msg->offset += I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE;
-		msg->len = msg->offset + len;
-		auto typeID = msg->GetTypeID ();
-		LogPrint ("TunnelGateway of ", (int)len, " bytes for tunnel ", (unsigned int)tunnelID, ". Msg type ", (int)typeID);
-			
-		if (typeID == eI2NPDatabaseStore || typeID == eI2NPDatabaseSearchReply)
-		{
-			// transit DatabaseStore my contain new/updated RI 
-			// or DatabaseSearchReply with new routers
-			auto ds = NewI2NPMessage ();
-			*ds = *msg;
-			i2p::data::netdb.PostI2NPMsg (ds);
-		}	
-		i2p::tunnel::TransitTunnel * tunnel =  i2p::tunnel::tunnels.GetTransitTunnel (tunnelID);
-		if (tunnel)
-			tunnel->SendTunnelDataMsg (msg);
-		else
-		{	
-			LogPrint ("Tunnel ", (unsigned int)tunnelID, " not found");
-			i2p::DeleteI2NPMessage (msg);
-		}	
-	}	
-
 	size_t GetI2NPMessageLength (const uint8_t * msg)
 	{
 		return bufbe16toh (msg + I2NP_HEADER_SIZE_OFFSET) + I2NP_HEADER_SIZE;
@@ -543,7 +514,7 @@ namespace i2p
 				break;	
 				case eI2NPTunnelGateway:
 					LogPrint ("TunnelGateway");
-					HandleTunnelGatewayMsg (msg);
+					i2p::tunnel::tunnels.PostTunnelData (msg);
 				break;
 				case eI2NPGarlic:
 					LogPrint ("Garlic");

I2NPProtocol.h

@@ -207,7 +207,6 @@ namespace tunnel
 	I2NPMessage * CreateTunnelDataMsg (const uint8_t * buf);	
 	I2NPMessage * CreateTunnelDataMsg (uint32_t tunnelID, const uint8_t * payload);		
 	
-	void HandleTunnelGatewayMsg (I2NPMessage * msg);
 	I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, const uint8_t * buf, size_t len);
 	I2NPMessage * CreateTunnelGatewayMsg (uint32_t tunnelID, I2NPMessageType msgType, 
 		const uint8_t * buf, size_t len, uint32_t replyMsgID = 0);

TransitTunnel.h

@@ -22,12 +22,12 @@ namespace tunnel
 			    const uint8_t * nextIdent, uint32_t nextTunnelID, 
 	    		const uint8_t * layerKey,const uint8_t * ivKey); 
 			
-			virtual void SendTunnelDataMsg (i2p::I2NPMessage * msg);
 			virtual size_t GetNumTransmittedBytes () const { return 0; };
 			
 			uint32_t GetTunnelID () const { return m_TunnelID; };
 
 			// implements TunnelBase
+			void SendTunnelDataMsg (i2p::I2NPMessage * msg);
 			void HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg);
 			void EncryptTunnelMsg (I2NPMessage * tunnelMsg); 
 			uint32_t GetNextTunnelID () const { return m_NextTunnelID; };

Tunnel.cpp

@@ -151,6 +151,12 @@ namespace tunnel
 		}
 	}	
 
+	void Tunnel::SendTunnelDataMsg (i2p::I2NPMessage * msg)
+	{
+		LogPrint (eLogInfo, "Can't send I2NP messages without delivery instructions");	
+		DeleteI2NPMessage (msg);
+	}	
+
 	void InboundTunnel::HandleTunnelDataMsg (I2NPMessage * msg)
 	{
 		if (IsFailed ()) SetState (eTunnelStateEstablished); // incoming messages means a tunnel is alive			
@@ -349,6 +355,7 @@ namespace tunnel
 				I2NPMessage * msg = m_Queue.GetNextWithTimeout (1000); // 1 sec
 				if (msg)
 				{	
+					uint8_t typeID = msg->GetTypeID ();
 					uint32_t prevTunnelID = 0;
 					TunnelBase * prevTunnel = nullptr;
 					do
@@ -360,12 +367,17 @@ namespace tunnel
 						else if (prevTunnel)
 							prevTunnel->FlushTunnelDataMsgs (); 
 						
-						if (!tunnel)
+						if (!tunnel && typeID == eI2NPTunnelData)
 							tunnel = GetInboundTunnel (tunnelID);
 						if (!tunnel)
 							tunnel = GetTransitTunnel (tunnelID);
 						if (tunnel)
-							tunnel->HandleTunnelDataMsg (msg);
+						{
+							if (typeID == eI2NPTunnelData)
+								tunnel->HandleTunnelDataMsg (msg);
+							else // tunnel gateway assumed
+								HandleTunnelGatewayMsg (tunnel, msg);
+						}
 						else	
 						{	
 							LogPrint ("Tunnel ", tunnelID, " not found");
@@ -398,6 +410,33 @@ namespace tunnel
 		}	
 	}	
 
+	void Tunnels::HandleTunnelGatewayMsg (TunnelBase * tunnel, I2NPMessage * msg)
+	{
+		if (!tunnel)
+		{
+			LogPrint (eLogError, "Missing tunnel for TunnelGateway");
+			i2p::DeleteI2NPMessage (msg);
+			return;
+		}
+		const uint8_t * payload = msg->GetPayload ();
+		uint16_t len = bufbe16toh(payload + TUNNEL_GATEWAY_HEADER_LENGTH_OFFSET);
+		// we make payload as new I2NP message to send
+		msg->offset += I2NP_HEADER_SIZE + TUNNEL_GATEWAY_HEADER_SIZE;
+		msg->len = msg->offset + len;
+		auto typeID = msg->GetTypeID ();
+		LogPrint (eLogDebug, "TunnelGateway of ", (int)len, " bytes for tunnel ", tunnel->GetTunnelID (), ". Msg type ", (int)typeID);
+			
+		if (typeID == eI2NPDatabaseStore || typeID == eI2NPDatabaseSearchReply)
+		{
+			// transit DatabaseStore my contain new/updated RI 
+			// or DatabaseSearchReply with new routers
+			auto ds = NewI2NPMessage ();
+			*ds = *msg;
+			i2p::data::netdb.PostI2NPMsg (ds);
+		}	
+		tunnel->SendTunnelDataMsg (msg);
+	}
+
 	void Tunnels::ManageTunnels ()
 	{
 		ManagePendingTunnels ();

Tunnel.h

@@ -61,6 +61,7 @@ namespace tunnel
 			bool HandleTunnelBuildResponse (uint8_t * msg, size_t len);
 			
 			// implements TunnelBase
+			void SendTunnelDataMsg (i2p::I2NPMessage * msg);
 			void EncryptTunnelMsg (I2NPMessage * tunnelMsg); 
 			uint32_t GetNextTunnelID () const { return m_Config->GetFirstHop ()->tunnelID; };
 			const i2p::data::IdentHash& GetNextIdentHash () const { return m_Config->GetFirstHop ()->router->GetIdentHash (); };
@@ -139,6 +140,8 @@ namespace tunnel
 			
 		private:
 			
+			void HandleTunnelGatewayMsg (TunnelBase * tunnel, I2NPMessage * msg);
+
 			void Run ();	
 			void ManageTunnels ();
 			void ManageOutboundTunnels ();

TunnelBase.h

@@ -37,6 +37,7 @@ namespace tunnel
 			virtual ~TunnelBase () {};
 			
 			virtual void HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg) = 0;
+			virtual void SendTunnelDataMsg (i2p::I2NPMessage * msg) = 0;
 			virtual void FlushTunnelDataMsgs () {};
 			virtual void EncryptTunnelMsg (I2NPMessage * tunnelMsg) = 0;
 			virtual uint32_t GetNextTunnelID () const = 0;