From 5ce9c0f1e20079505a2549c708f6d3ac8049c88a Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Wed, 2 Jun 2021 14:45:21 -0400
Subject: [PATCH] build new tunnels instead slow

---
 libi2pd/Tunnel.h       | 3 +++
 libi2pd/TunnelPool.cpp | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/libi2pd/Tunnel.h b/libi2pd/Tunnel.h
index 7e8edca7..f30eab14 100644
--- a/libi2pd/Tunnel.h
+++ b/libi2pd/Tunnel.h
@@ -38,6 +38,7 @@ namespace tunnel
 	const int TUNNEL_CREATION_TIMEOUT = 30; // 30 seconds
 	const int STANDARD_NUM_RECORDS = 4; // in VariableTunnelBuild message
 	const int MAX_NUM_RECORDS = 8;
+	const int HIGH_LATENCY_PER_HOP = 250; // in milliseconds
 	
 	enum TunnelState
 	{
@@ -98,6 +99,8 @@ namespace tunnel
 			bool LatencyFitsRange(uint64_t lowerbound, uint64_t upperbound) const;
 
 			bool LatencyIsKnown() const { return m_Latency > 0; }
+			bool IsSlow () const { return LatencyIsKnown() && (int)m_Latency > HIGH_LATENCY_PER_HOP*GetNumHops (); }
+			
 		protected:
 
 			void PrintHops (std::stringstream& s) const;
diff --git a/libi2pd/TunnelPool.cpp b/libi2pd/TunnelPool.cpp
index f2f0b4c8..b025219f 100644
--- a/libi2pd/TunnelPool.cpp
+++ b/libi2pd/TunnelPool.cpp
@@ -525,7 +525,7 @@ namespace tunnel
 
 	void TunnelPool::RecreateInboundTunnel (std::shared_ptr<InboundTunnel> tunnel)
 	{
-		if (IsExploratory ()) // always create new exploratory tunnel
+		if (IsExploratory () || tunnel->IsSlow ()) // always create new exploratory tunnel or if slow
 		{
 			CreateInboundTunnel ();
 			return;
@@ -576,7 +576,7 @@ namespace tunnel
 
 	void TunnelPool::RecreateOutboundTunnel (std::shared_ptr<OutboundTunnel> tunnel)
 	{
-		if (IsExploratory ()) // always create new exploratory tunnel
+		if (IsExploratory () || tunnel->IsSlow ()) // always create new exploratory tunnel or if slow
 		{
 			CreateOutboundTunnel ();
 			return;