common termination timer for all SSU sessions

NTCPSession.cpp

@@ -22,7 +22,6 @@ namespace transport
 		TransportSession (in_RemoteRouter, NTCP_TERMINATION_TIMEOUT),	
 		m_Server (server), m_Socket (m_Server.GetService ()), 
 		m_IsEstablished (false), m_IsTerminated (false),
-		m_LastActivityTimestamp (i2p::util::GetSecondsSinceEpoch ()),
 		m_ReceiveBufferOffset (0), m_NextMessage (nullptr), m_IsSending (false)
 	{		
 		m_Establisher = new Establisher;

NTCPSession.h

@@ -54,9 +54,7 @@ namespace transport
 			void Done ();
 
 			boost::asio::ip::tcp::socket& GetSocket () { return m_Socket; };
-			bool IsEstablished () const { return m_IsEstablished; };
-			bool IsTerminationTimeoutExpired (uint64_t ts) const 
-			{ return ts >= m_LastActivityTimestamp + GetTerminationTimeout (); };		
+			bool IsEstablished () const { return m_IsEstablished; };	
 
 			void ClientLogin ();
 			void ServerLogin ();
@@ -103,7 +101,6 @@ namespace transport
 			NTCPServer& m_Server;
 			boost::asio::ip::tcp::socket m_Socket;
 			bool m_IsEstablished, m_IsTerminated;
-			uint64_t m_LastActivityTimestamp;
 			
 			i2p::crypto::CBCDecryption m_Decryption;
 			i2p::crypto::CBCEncryption m_Encryption;

SSU.cpp

@@ -17,7 +17,8 @@ namespace transport
 		m_Work (m_Service), m_WorkV6 (m_ServiceV6), m_ReceiversWork (m_ReceiversService), 
 		m_EndpointV6 (addr, port), 
 		m_Socket (m_ReceiversService, m_Endpoint), m_SocketV6 (m_ReceiversService), 
-		m_IntroducersUpdateTimer (m_Service), m_PeerTestsCleanupTimer (m_Service)	
+		m_IntroducersUpdateTimer (m_Service), m_PeerTestsCleanupTimer (m_Service),
+		m_TerminationTimer (m_Service), m_TerminationTimerV6 (m_ServiceV6)	
 	{
 		m_SocketV6.open (boost::asio::ip::udp::v6());
 		m_SocketV6.set_option (boost::asio::ip::v6_only (true));
@@ -32,7 +33,8 @@ namespace transport
 		m_Work (m_Service), m_WorkV6 (m_ServiceV6), m_ReceiversWork (m_ReceiversService), 
 		m_Endpoint (boost::asio::ip::udp::v4 (), port), m_EndpointV6 (boost::asio::ip::udp::v6 (), port), 
 		m_Socket (m_ReceiversService, m_Endpoint), m_SocketV6 (m_ReceiversService), 
-		m_IntroducersUpdateTimer (m_Service), m_PeerTestsCleanupTimer (m_Service)	
+		m_IntroducersUpdateTimer (m_Service), m_PeerTestsCleanupTimer (m_Service),
+		m_TerminationTimer (m_Service), m_TerminationTimerV6 (m_ServiceV6)	
 	{
 		
 		m_Socket.set_option (boost::asio::socket_base::receive_buffer_size (65535));
@@ -59,11 +61,13 @@ namespace transport
 		{
 			m_Thread = new std::thread (std::bind (&SSUServer::Run, this));
 			m_ReceiversService.post (std::bind (&SSUServer::Receive, this));
+			ScheduleTermination ();		
 		}
 		if (context.SupportsV6 ())
 		{	
 			m_ThreadV6 = new std::thread (std::bind (&SSUServer::RunV6, this));
 			m_ReceiversService.post (std::bind (&SSUServer::ReceiveV6, this));	
+			ScheduleTerminationV6 ();	
 		}
 		SchedulePeerTestsCleanupTimer ();	
 		ScheduleIntroducersUpdateTimer (); // wait for 30 seconds and decide if we need introducers
@@ -640,6 +644,58 @@ namespace transport
 			SchedulePeerTestsCleanupTimer ();
 		}
 	}
+
+	void SSUServer::ScheduleTermination ()
+	{
+		m_TerminationTimer.expires_from_now (boost::posix_time::seconds(SSU_TERMINATION_CHECK_TIMEOUT));
+		m_TerminationTimer.async_wait (std::bind (&SSUServer::HandleTerminationTimer,
+			this, std::placeholders::_1));
+	}
+
+	void SSUServer::HandleTerminationTimer (const boost::system::error_code& ecode)
+	{
+		if (ecode != boost::asio::error::operation_aborted)
+		{	
+			auto ts = i2p::util::GetSecondsSinceEpoch ();
+			for (auto& it: m_Sessions)
+ 				if (it.second->IsTerminationTimeoutExpired (ts))
+				{
+					auto session = it.second;
+					m_Service.post ([session] 
+						{ 
+							LogPrint (eLogWarning, "SSU: no activity with ", session->GetRemoteEndpoint (), " for ", session->GetTerminationTimeout (), " seconds");
+							session->Failed ();
+						});	
+				}
+			ScheduleTermination ();	
+		}	
+	}	
+
+	void SSUServer::ScheduleTerminationV6 ()
+	{
+		m_TerminationTimerV6.expires_from_now (boost::posix_time::seconds(SSU_TERMINATION_CHECK_TIMEOUT));
+		m_TerminationTimerV6.async_wait (std::bind (&SSUServer::HandleTerminationTimerV6,
+			this, std::placeholders::_1));
+	}
+
+	void SSUServer::HandleTerminationTimerV6 (const boost::system::error_code& ecode)
+	{
+		if (ecode != boost::asio::error::operation_aborted)
+		{	
+			auto ts = i2p::util::GetSecondsSinceEpoch ();
+			for (auto& it: m_SessionsV6)
+ 				if (it.second->IsTerminationTimeoutExpired (ts))
+				{
+					auto session = it.second;
+					m_ServiceV6.post ([session] 
+						{ 
+							LogPrint (eLogWarning, "SSU: no activity with ", session->GetRemoteEndpoint (), " for ", session->GetTerminationTimeout (), " seconds");
+							session->Failed ();
+						});	
+				}
+			ScheduleTerminationV6 ();	
+		}	
+	}	
 }
 }
 

SSU.h

@@ -23,6 +23,7 @@ namespace transport
 	const int SSU_KEEP_ALIVE_INTERVAL = 30; // 30 seconds	
 	const int SSU_PEER_TEST_TIMEOUT = 60; // 60 seconds		
 	const int SSU_TO_INTRODUCER_SESSION_DURATION = 3600; // 1 hour
+	const int SSU_TERMINATION_CHECK_TIMEOUT = 30; // 30 seconds
 	const size_t SSU_MAX_NUM_INTRODUCERS = 3;
 
 	struct SSUPacket
@@ -90,6 +91,12 @@ namespace transport
 			void SchedulePeerTestsCleanupTimer ();
 			void HandlePeerTestsCleanupTimer (const boost::system::error_code& ecode);
 
+			// timer
+			void ScheduleTermination ();
+			void HandleTerminationTimer (const boost::system::error_code& ecode);
+			void ScheduleTerminationV6 ();
+			void HandleTerminationTimerV6 (const boost::system::error_code& ecode);
+
 		private:
 
 			struct PeerTest
@@ -106,7 +113,8 @@ namespace transport
 			boost::asio::io_service::work m_Work, m_WorkV6, m_ReceiversWork;
 			boost::asio::ip::udp::endpoint m_Endpoint, m_EndpointV6;
 			boost::asio::ip::udp::socket m_Socket, m_SocketV6;
-			boost::asio::deadline_timer m_IntroducersUpdateTimer, m_PeerTestsCleanupTimer;
+			boost::asio::deadline_timer m_IntroducersUpdateTimer, m_PeerTestsCleanupTimer,
+				m_TerminationTimer, m_TerminationTimerV6;
 			std::list<boost::asio::ip::udp::endpoint> m_Introducers; // introducers we are connected to
 			std::map<boost::asio::ip::udp::endpoint, std::shared_ptr<SSUSession> > m_Sessions, m_SessionsV6;
 			std::map<uint32_t, boost::asio::ip::udp::endpoint> m_Relays; // we are introducer

SSUSession.cpp

@@ -14,7 +14,7 @@ namespace transport
 	SSUSession::SSUSession (SSUServer& server, boost::asio::ip::udp::endpoint& remoteEndpoint,
 		std::shared_ptr<const i2p::data::RouterInfo> router, bool peerTest ): 
 		TransportSession (router, SSU_TERMINATION_TIMEOUT), 
-		m_Server (server), m_RemoteEndpoint (remoteEndpoint), m_Timer (GetService ()), 
+		m_Server (server), m_RemoteEndpoint (remoteEndpoint), m_ConnectTimer (GetService ()), 
 		m_IsPeerTest (peerTest),m_State (eSessionStateUnknown), m_IsSessionKey (false), 
 		m_RelayTag (0),m_Data (*this), m_IsDataReceived (false)
 	{	
@@ -97,7 +97,7 @@ namespace transport
 		{
 			if (!len) return; // ignore zero-length packets	
 			if (m_State == eSessionStateEstablished)
-				ScheduleTermination ();		
+				m_LastActivityTimestamp = i2p::util::GetSecondsSinceEpoch ();	
 			
 			if (m_IsSessionKey && Validate (buf, len, m_MacKey)) // try session key first
 				DecryptSessionKey (buf, len);	
@@ -229,7 +229,7 @@ namespace transport
 		}
 
 		LogPrint (eLogDebug, "SSU message: session created");
-		m_Timer.cancel (); // connect timer
+		m_ConnectTimer.cancel (); // connect timer
 		SignedData s; // x,y, our IP, our port, remote IP, remote port, relayTag, signed on time 
 		auto headerSize = GetSSUHeaderSize (buf);	
 		if (headerSize >= len)
@@ -804,9 +804,9 @@ namespace transport
 
 	void SSUSession::ScheduleConnectTimer ()
 	{
-		m_Timer.cancel ();
-		m_Timer.expires_from_now (boost::posix_time::seconds(SSU_CONNECT_TIMEOUT));
-		m_Timer.async_wait (std::bind (&SSUSession::HandleConnectTimer,
+		m_ConnectTimer.cancel ();
+		m_ConnectTimer.expires_from_now (boost::posix_time::seconds(SSU_CONNECT_TIMEOUT));
+		m_ConnectTimer.async_wait (std::bind (&SSUSession::HandleConnectTimer,
 			shared_from_this (), std::placeholders::_1));	
 }
 
@@ -826,8 +826,8 @@ namespace transport
 		if (m_State == eSessionStateUnknown)
 		{	
 			// set connect timer
-			m_Timer.expires_from_now (boost::posix_time::seconds(SSU_CONNECT_TIMEOUT));
-			m_Timer.async_wait (std::bind (&SSUSession::HandleConnectTimer,
+			m_ConnectTimer.expires_from_now (boost::posix_time::seconds(SSU_CONNECT_TIMEOUT));
+			m_ConnectTimer.async_wait (std::bind (&SSUSession::HandleConnectTimer,
 				shared_from_this (), std::placeholders::_1));
 		}
 		uint32_t nonce;
@@ -840,8 +840,8 @@ namespace transport
 	{
 		m_State = eSessionStateIntroduced;
 		// set connect timer
-		m_Timer.expires_from_now (boost::posix_time::seconds(SSU_CONNECT_TIMEOUT));
-		m_Timer.async_wait (std::bind (&SSUSession::HandleConnectTimer,
+		m_ConnectTimer.expires_from_now (boost::posix_time::seconds(SSU_CONNECT_TIMEOUT));
+		m_ConnectTimer.async_wait (std::bind (&SSUSession::HandleConnectTimer,
 			shared_from_this (), std::placeholders::_1));			
 	}
 
@@ -851,7 +851,7 @@ namespace transport
 		SendSesionDestroyed ();
 		transports.PeerDisconnected (shared_from_this ());
 		m_Data.Stop ();
-		m_Timer.cancel ();
+		m_ConnectTimer.cancel ();
 	}	
 
 	void SSUSession::Done ()
@@ -868,7 +868,7 @@ namespace transport
 		transports.PeerConnected (shared_from_this ());
 		if (m_IsPeerTest)
 			SendPeerTest ();
-		ScheduleTermination ();
+		m_LastActivityTimestamp = i2p::util::GetSecondsSinceEpoch ();
 	}	
 
 	void SSUSession::Failed ()
@@ -880,24 +880,6 @@ namespace transport
 		}	
 	}	
 
-	void SSUSession::ScheduleTermination ()
-	{
-		m_Timer.cancel ();
-		m_Timer.expires_from_now (boost::posix_time::seconds(GetTerminationTimeout ()));
-		m_Timer.async_wait (std::bind (&SSUSession::HandleTerminationTimer,
-			shared_from_this (), std::placeholders::_1));
-	}
-
-	void SSUSession::HandleTerminationTimer (const boost::system::error_code& ecode)
-	{
-		if (ecode != boost::asio::error::operation_aborted)
-		{	
-			LogPrint (eLogWarning, "SSU: no activity with ", m_RemoteEndpoint, " for ", GetTerminationTimeout (), " seconds");
-			Failed ();
-		}	
-	}	
-	
-
 	void SSUSession::SendI2NPMessages (const std::vector<std::shared_ptr<I2NPMessage> >& msgs)
 	{
 		GetService ().post (std::bind (&SSUSession::PostI2NPMessages, shared_from_this (), msgs));    
@@ -1126,7 +1108,7 @@ namespace transport
 			FillHeaderAndEncrypt (PAYLOAD_TYPE_DATA, buf, 48);
 			Send (buf, 48);
 			LogPrint (eLogDebug, "SSU: keep-alive sent");
-			ScheduleTermination ();
+			m_LastActivityTimestamp = i2p::util::GetSecondsSinceEpoch ();
 		}	
 	}
 

SSUSession.h

@@ -77,6 +77,7 @@ namespace transport
 			void WaitForIntroduction ();
 			void Close ();
 			void Done ();
+			void Failed ();
 			boost::asio::ip::udp::endpoint& GetRemoteEndpoint () { return m_RemoteEndpoint; };
 			bool IsV6 () const { return m_RemoteEndpoint.address ().is_v6 (); };
 			void SendI2NPMessages (const std::vector<std::shared_ptr<I2NPMessage> >& msgs);
@@ -114,7 +115,6 @@ namespace transport
 			void ProcessRelayResponse (const uint8_t * buf, size_t len);
 			void ProcessRelayIntro (const uint8_t * buf, size_t len);
 			void Established ();
-			void Failed ();
 			void ScheduleConnectTimer ();
 			void HandleConnectTimer (const boost::system::error_code& ecode);
 			void ProcessPeerTest (const uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& senderEndpoint);
@@ -131,15 +131,12 @@ namespace transport
 			void DecryptSessionKey (uint8_t * buf, size_t len);
 			bool Validate (uint8_t * buf, size_t len, const i2p::crypto::MACKey& macKey);			
 
-			void ScheduleTermination ();
-			void HandleTerminationTimer (const boost::system::error_code& ecode);
-
 		private:
 	
 			friend class SSUData; // TODO: change in later
 			SSUServer& m_Server;
 			boost::asio::ip::udp::endpoint m_RemoteEndpoint;
-			boost::asio::deadline_timer m_Timer;
+			boost::asio::deadline_timer m_ConnectTimer;
 			bool m_IsPeerTest;
 			SessionState m_State;
 			bool m_IsSessionKey;

TransportSession.h

@@ -9,6 +9,7 @@
 #include "Crypto.h"
 #include "RouterInfo.h"
 #include "I2NPProtocol.h"
+#include "Timestamp.h"
 
 namespace i2p
 {
@@ -54,7 +55,8 @@ namespace transport
 		public:
 
 			TransportSession (std::shared_ptr<const i2p::data::RouterInfo> router, int terminationTimeout): 
-				m_DHKeysPair (nullptr), m_NumSentBytes (0), m_NumReceivedBytes (0), m_IsOutgoing (router), m_TerminationTimeout (terminationTimeout)
+				m_DHKeysPair (nullptr), m_NumSentBytes (0), m_NumReceivedBytes (0), m_IsOutgoing (router), m_TerminationTimeout (terminationTimeout), 
+				m_LastActivityTimestamp (i2p::util::GetSecondsSinceEpoch ())
 			{
 				if (router)
 					m_RemoteIdentity = router->GetRouterIdentity ();
@@ -72,6 +74,8 @@ namespace transport
 			
 			int GetTerminationTimeout () const { return m_TerminationTimeout; };
 			void SetTerminationTimeout (int terminationTimeout) { m_TerminationTimeout = terminationTimeout; };	
+			bool IsTerminationTimeoutExpired (uint64_t ts) const 
+			{ return ts >= m_LastActivityTimestamp + GetTerminationTimeout (); };	
 
 			virtual void SendI2NPMessages (const std::vector<std::shared_ptr<I2NPMessage> >& msgs) = 0;
 			
@@ -82,6 +86,7 @@ namespace transport
 			size_t m_NumSentBytes, m_NumReceivedBytes;
 			bool m_IsOutgoing;
 			int m_TerminationTimeout;
+			uint64_t m_LastActivityTimestamp;
 	};	
 }
 }