publish high congestion cap

libi2pd/I2NPProtocol.cpp

@@ -364,10 +364,7 @@ namespace i2p
 				if (!i2p::context.DecryptTunnelBuildRecord (record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, clearText)) return false;
 				uint8_t retCode = 0;
 				// replace record to reply
-				if (i2p::context.AcceptsTunnels () &&
+				if (i2p::context.AcceptsTunnels () && !i2p::context.IsHighCongestion ())
-					!i2p::tunnel::tunnels.IsTooManyTransitTunnels () &&
-					!i2p::transport::transports.IsBandwidthExceeded () &&
-					!i2p::transport::transports.IsTransitBandwidthExceeded ())
 				{
 					auto transitTunnel = i2p::tunnel::CreateTransitTunnel (
 							bufbe32toh (clearText + ECIES_BUILD_REQUEST_RECORD_RECEIVE_TUNNEL_OFFSET),
@@ -561,10 +558,7 @@ namespace i2p
 
 				// check if we accept this tunnel
 				uint8_t retCode = 0;
-				if (!i2p::context.AcceptsTunnels () ||
+				if (!i2p::context.AcceptsTunnels () || i2p::context.IsHighCongestion ())
-					i2p::tunnel::tunnels.IsTooManyTransitTunnels () ||
-					i2p::transport::transports.IsBandwidthExceeded () ||
-					i2p::transport::transports.IsTransitBandwidthExceeded ())
 					retCode = 30;
 				if (!retCode)
 				{

libi2pd/RouterContext.cpp

@@ -60,6 +60,8 @@ namespace i2p
 			{
 				m_PublishTimer.reset (new boost::asio::deadline_timer (m_Service->GetService ()));
 				ScheduleInitialPublish ();
+				m_CongestionUpdateTimer.reset (new boost::asio::deadline_timer (m_Service->GetService ()));
+				ScheduleCongestionUpdate ();
 			}	
 		}	
 	}
@@ -70,6 +72,8 @@ namespace i2p
 		{	
 			if (m_PublishTimer)
 				m_PublishTimer->cancel ();	
+			if (m_CongestionUpdateTimer)
+				m_CongestionUpdateTimer->cancel ();
 			m_Service->Stop ();
 		}	
 	}	
@@ -1107,6 +1111,13 @@ namespace i2p
 		return i2p::tunnel::tunnels.GetExploratoryPool ();
 	}
 
+	bool RouterContext::IsHighCongestion () const
+	{
+		return i2p::tunnel::tunnels.IsTooManyTransitTunnels () ||
+			i2p::transport::transports.IsBandwidthExceeded () ||
+			i2p::transport::transports.IsTransitBandwidthExceeded ();
+	}	
+		
 	void RouterContext::HandleI2NPMessage (const uint8_t * buf, size_t len)
 	{
 		i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len)));
@@ -1368,4 +1379,26 @@ namespace i2p
 			SchedulePublishResend ();
 		}	
 	}	
+
+	void RouterContext::ScheduleCongestionUpdate ()
+	{
+		if (m_CongestionUpdateTimer)
+		{	
+			m_CongestionUpdateTimer->cancel ();
+			m_CongestionUpdateTimer->expires_from_now (boost::posix_time::seconds(ROUTER_INFO_CONGESTION_UPDATE_INTERVAL));
+			m_CongestionUpdateTimer->async_wait (std::bind (&RouterContext::HandleCongestionUpdateTimer,
+				this, std::placeholders::_1));
+		}	
+		else
+			LogPrint (eLogError, "Router: Congestion update timer is NULL");
+	}
+		
+	void RouterContext::HandleCongestionUpdateTimer (const boost::system::error_code& ecode)
+	{
+		if (ecode != boost::asio::error::operation_aborted)
+		{
+			m_RouterInfo.SetHighCongestion (IsHighCongestion ());
+			ScheduleCongestionUpdate ();
+		}	
+	}	
 }

libi2pd/RouterContext.h

@@ -37,6 +37,7 @@ namespace garlic
 	const int ROUTER_INFO_PUBLISH_INTERVAL_VARIANCE = 105;// in seconds
 	const int ROUTER_INFO_CONFIRMATION_TIMEOUT = 5; // in seconds
 	const int ROUTER_INFO_MAX_PUBLISH_EXCLUDED_FLOODFILLS = 15;
+	const int ROUTER_INFO_CONGESTION_UPDATE_INTERVAL = 12*60; // in seconds
 
 	enum RouterStatus
 	{
@@ -152,6 +153,7 @@ namespace garlic
 			void SetShareRatio (int percents); // 0 - 100
 			bool AcceptsTunnels () const { return m_AcceptsTunnels; };
 			void SetAcceptsTunnels (bool acceptsTunnels) { m_AcceptsTunnels = acceptsTunnels; };
+			bool IsHighCongestion () const;
 			bool SupportsV6 () const { return m_RouterInfo.IsV6 (); };
 			bool SupportsV4 () const { return m_RouterInfo.IsV4 (); };
 			bool SupportsMesh () const { return m_RouterInfo.IsMesh (); };
@@ -213,6 +215,8 @@ namespace garlic
 			void Publish ();
 			void SchedulePublishResend ();
 			void HandlePublishResendTimer (const boost::system::error_code& ecode);
+			void ScheduleCongestionUpdate ();
+			void HandleCongestionUpdateTimer (const boost::system::error_code& ecode);
 			
 		private:
 
@@ -235,7 +239,7 @@ namespace garlic
 			i2p::crypto::NoiseSymmetricState m_InitialNoiseState, m_CurrentNoiseState;
 			// publish
 			std::unique_ptr<RouterService> m_Service;
-			std::unique_ptr<boost::asio::deadline_timer> m_PublishTimer;
+			std::unique_ptr<boost::asio::deadline_timer> m_PublishTimer, m_CongestionUpdateTimer;
 			std::set<i2p::data::IdentHash> m_PublishExcluded;
 			uint32_t m_PublishReplyToken;
 			bool m_IsHiddenMode; // not publish

libi2pd/RouterInfo.cpp

@@ -1071,10 +1071,16 @@ namespace data
 		if (m_Congestion == eLowCongestion || m_Congestion == eMediumCongestion) return false;
 		if (m_Congestion == eRejectAll) return true;
 		if (m_Congestion == eHighCongestion)
-			return 	(i2p::util::GetMillisecondsSinceEpoch () < m_Timestamp + HIGH_CONGESION_INTERVAL*1000LL) ? true : false;
+			return 	(i2p::util::GetMillisecondsSinceEpoch () < m_Timestamp + HIGH_CONGESTION_INTERVAL*1000LL) ? true : false;
 		return false;
 	}	
 
+	LocalRouterInfo::LocalRouterInfo (const std::string& fullPath): 
+		RouterInfo (fullPath) 
+	{
+		SetHighCongestion (false); // drop congestion
+	}
+		
 	void LocalRouterInfo::CreateBuffer (const PrivateKeys& privateKeys)
 	{
 		RefreshTimestamp ();
@@ -1143,6 +1149,16 @@ namespace data
 		SetProperty ("caps", caps);
 	}
 
+	void LocalRouterInfo::SetHighCongestion (bool highCongestion)
+	{
+		Congestion c = highCongestion ? eHighCongestion : eLowCongestion;
+		if (c != GetCongestion ())
+		{
+			SetCongestion (c);
+			UpdateCapsProperty ();
+		}	
+ 	}	
+		
 	void LocalRouterInfo::WriteToStream (std::ostream& s) const
 	{
 		auto addresses = GetAddresses ();

libi2pd/RouterInfo.h

@@ -60,7 +60,7 @@ namespace data
 	const uint8_t COST_SSU2_NON_PUBLISHED = 15;
 
 	const size_t MAX_RI_BUFFER_SIZE = 3072; // if RouterInfo exceeds 3K we consider it as malformed, might extend later
-	const int HIGH_CONGESION_INTERVAL = 15*60; // in seconds, 15 minutes
+	const int HIGH_CONGESTION_INTERVAL = 15*60; // in seconds, 15 minutes
 		
 	class RouterInfo: public RoutingDestination
 	{
@@ -291,6 +291,7 @@ namespace data
 			void RefreshTimestamp ();
 			CompatibleTransports GetReachableTransports () const { return m_ReachableTransports; };
 			void SetReachableTransports (CompatibleTransports transports) { m_ReachableTransports = transports; };
+			void SetCongestion (Congestion c) { m_Congestion = c; };
 		
 		private:
 
@@ -328,9 +329,10 @@ namespace data
 		public:
 
 			LocalRouterInfo () = default;
-			LocalRouterInfo (const std::string& fullPath): RouterInfo (fullPath) {};
+			LocalRouterInfo (const std::string& fullPath);
 			void CreateBuffer (const PrivateKeys& privateKeys);
 			void UpdateCaps (uint8_t caps);
+			void SetHighCongestion (bool highCongestion);
 
 			void SetProperty (const std::string& key, const std::string& value) override;
 			void DeleteProperty (const std::string& key);