close stream if SYACK is not acked

4 days ago · 5b2d0c579b
1 changed files with 84 additions and 83 deletions
--- a/libi2pd/Streaming.cpp
+++ b/libi2pd/Streaming.cpp
@ -1337,104 +1337,105 @@ namespace stream
				@@ -1337,104 +1337,105 @@ namespace stream
 	
 	void Stream::ResendPacket ()
 	{
-			// check for resend attempts
-			if (m_NumResendAttempts >= MAX_NUM_RESEND_ATTEMPTS)
-			{
-				LogPrint (eLogWarning, "Streaming: packet was not ACKed after ", MAX_NUM_RESEND_ATTEMPTS, " attempts, terminate, rSID=", m_RecvStreamID, ", sSID=", m_SendStreamID);
-				m_Status = eStreamStatusReset;
-				Close ();
-				return;
-			}
+		// check for resend attempts
+		if (m_SequenceNumber == 1 && m_NumResendAttempts > 0)
+		{
+			LogPrint (eLogWarning, "Streaming: SYNACK packet was not ACKed after ", m_NumResendAttempts, " attempts, terminate, rSID=", m_RecvStreamID, ", sSID=", m_SendStreamID);
+			m_Status = eStreamStatusReset;
+			Close ();
+			return;
+		}
+		if (m_NumResendAttempts >= MAX_NUM_RESEND_ATTEMPTS)
+		{
+			LogPrint (eLogWarning, "Streaming: packet was not ACKed after ", MAX_NUM_RESEND_ATTEMPTS, " attempts, terminate, rSID=", m_RecvStreamID, ", sSID=", m_SendStreamID);
+			m_Status = eStreamStatusReset;
+			Close ();
+			return;
+		}

-			// collect packets to resend
-			auto ts = i2p::util::GetMillisecondsSinceEpoch ();
-			std::vector<Packet *> packets;
-			if (m_IsNAcked)
+		// collect packets to resend
+		auto ts = i2p::util::GetMillisecondsSinceEpoch ();
+		std::vector<Packet *> packets;
+		if (m_IsNAcked)
+		{
+			for (auto it : m_NACKedPackets)
 			{
-				for (auto it : m_NACKedPackets)
+				if (ts >= it->sendTime + m_RTO)
 				{
-					if (ts >= it->sendTime + m_RTO)
-					{
-						if (ts < it->sendTime + m_RTO*2)
-							it->resent = true;
-						else
-							it->resent = false;
-						it->sendTime = ts;
-						packets.push_back (it);
-						if ((int)packets.size () >= m_NumPacketsToSend) break;
-					}
+					if (ts < it->sendTime + m_RTO*2)
+						it->resent = true;
+					else
+						it->resent = false;
+					it->sendTime = ts;
+					packets.push_back (it);
+					if ((int)packets.size () >= m_NumPacketsToSend) break;
 				}
 			}
-			else
+		}
+		else
+		{
+			for (auto it : m_SentPackets)
 			{
-				for (auto it : m_SentPackets)
+				if (ts >= it->sendTime + m_RTO)
 				{
-					if (ts >= it->sendTime + m_RTO)
-					{
-						if (ts < it->sendTime + m_RTO*2)
-							it->resent = true;
-						else
-							it->resent = false;
-						it->sendTime = ts;
-						packets.push_back (it);
-						if ((int)packets.size () >= m_NumPacketsToSend) break;
-					}
+					if (ts < it->sendTime + m_RTO*2)
+						it->resent = true;
+					else
+						it->resent = false;
+					it->sendTime = ts;
+					packets.push_back (it);
+					if ((int)packets.size () >= m_NumPacketsToSend) break;
 				}
 			}
-			
-			// select tunnels if necessary and send
-			if (packets.size () > 0 && m_IsSendTime)
+		}
+		
+		// select tunnels if necessary and send
+		if (packets.size () > 0 && m_IsSendTime)
+		{
+			if (m_IsNAcked) m_NumResendAttempts = 1;
+			else if (m_IsTimeOutResend) m_NumResendAttempts++;
+			if (m_NumResendAttempts == 1 && m_RTO != INITIAL_RTO)
+			{
+				// loss-based CC
+				if (!m_IsWinDropped && LOSS_BASED_CONTROL_ENABLED)
+					ProcessWindowDrop ();
+			}
+			else if (m_IsTimeOutResend)
 			{
-				if (m_IsNAcked) m_NumResendAttempts = 1;
-				else if (m_IsTimeOutResend) m_NumResendAttempts++;
-				if (m_NumResendAttempts == 1 && m_RTO != INITIAL_RTO)
+				m_IsTimeOutResend = false;
+				m_RTO = INITIAL_RTO; // drop RTO to initial upon tunnels pair change
+				m_WindowDropTargetSize = INITIAL_WINDOW_SIZE;
+				m_LastWindowDropSize = 0;
+				m_WindowIncCounter = 0;
+				m_IsWinDropped = true;
+				m_IsFirstRttSample = true;
+				m_DropWindowDelaySequenceNumber = 0;
+				m_IsFirstACK = true;
+				UpdatePacingTime ();
+				if (m_RoutingSession) m_RoutingSession->SetSharedRoutingPath (nullptr);
+				if (m_NumResendAttempts & 1)
 				{
-					// loss-based CC
-					if (!m_IsWinDropped && LOSS_BASED_CONTROL_ENABLED)
-						ProcessWindowDrop ();
+					// pick another outbound tunnel
+					m_CurrentOutboundTunnel = m_LocalDestination.GetOwner ()->GetTunnelPool ()->GetNextOutboundTunnel (m_CurrentOutboundTunnel);
+					LogPrint (eLogWarning, "Streaming: Resend #", m_NumResendAttempts,
+						", another outbound tunnel has been selected for stream with sSID=", m_SendStreamID);
 				}
-				else if (m_IsTimeOutResend)
+				else
 				{
-					m_IsTimeOutResend = false;
-					m_RTO = INITIAL_RTO; // drop RTO to initial upon tunnels pair change
-					m_WindowDropTargetSize = INITIAL_WINDOW_SIZE;
-					m_LastWindowDropSize = 0;
-					m_WindowIncCounter = 0;
-					m_IsWinDropped = true;
-					m_IsFirstRttSample = true;
-					m_DropWindowDelaySequenceNumber = 0;
-					m_IsFirstACK = true;
-					UpdatePacingTime ();
-					if (m_RoutingSession) m_RoutingSession->SetSharedRoutingPath (nullptr);
-					if (m_NumResendAttempts & 1)
-					{
-						// pick another outbound tunnel
-						m_CurrentOutboundTunnel = m_LocalDestination.GetOwner ()->GetTunnelPool ()->GetNextOutboundTunnel (m_CurrentOutboundTunnel);
-						LogPrint (eLogWarning, "Streaming: Resend #", m_NumResendAttempts,
-							", another outbound tunnel has been selected for stream with sSID=", m_SendStreamID);
-					}
-					else
-					{
-						CancelRemoteLeaseChange ();
-						UpdateCurrentRemoteLease (); // pick another lease
-						LogPrint (eLogWarning, "Streaming: Resend #", m_NumResendAttempts,
-							", another remote lease has been selected for stream with rSID=", m_RecvStreamID, ", sSID=", m_SendStreamID);
-					}
+					CancelRemoteLeaseChange ();
+					UpdateCurrentRemoteLease (); // pick another lease
+					LogPrint (eLogWarning, "Streaming: Resend #", m_NumResendAttempts,
+						", another remote lease has been selected for stream with rSID=", m_RecvStreamID, ", sSID=", m_SendStreamID);
 				}
-				SendPackets (packets);
-				m_LastSendTime = ts;
-				m_IsSendTime = false;
-				if (m_IsNAcked || m_IsResendNeeded) 
-				{
-					if (m_SequenceNumber > 1) // doesn't resend agressively very first packet
-						ScheduleSend ();
-					else
-						ScheduleResend ();
-				}	
 			}
-			else
-				SendBuffer ();
-			if (!m_IsNAcked && !m_IsResendNeeded) ScheduleResend ();
+			SendPackets (packets);
+			m_LastSendTime = ts;
+			m_IsSendTime = false;
+			if (m_IsNAcked || m_IsResendNeeded) ScheduleSend ();
+		}
+		else
+			SendBuffer ();
+		if (!m_IsNAcked && !m_IsResendNeeded) ScheduleResend ();
 	}

 	void Stream::ScheduleAck (int timeout)