[deb] update patch

Signed-off-by: r4sas <r4sas@i2pmail.org>

ChangeLog

@@ -1,6 +1,47 @@
 # for this file format description,
 # see https://github.com/olivierlacan/keep-a-changelog
 
+## [2.55.0] - 2024-12-30
+### Added
+- Support boost 1.87
+- "i2p.streaming.maxConcurrentStreams" tunnel's param to limit number of simultaneous streams
+- Separate thread for tunnel build requests
+- Show next peer and connectivity on "Transit tunnels" page
+- Tunnel name for local destination thread
+- Throttle incoming ECIESx25519 sessions
+- Send tunnel data to transport session directly if possible
+- Publish 'R' cap for yggdrasil-only routers, and 'U' cap for routers through proxy
+- Random tunnel rejection when medium congestion
+- Save unreachable router's endpoint to use it next time without introducers
+- Recognize symmetric NAT from peer test message 7
+- Resend HolePunch and RelayResponse messages
+### Changed
+- Removed own implementation of AESNI and always use one from openssl
+- Renamed main thread to i2pd-daemon
+- Set i2p.streaming.profile=2 for shared local destination
+- Reduced LeaseSet and RouterInfo lookup timeouts
+- Cleanup ECIES sessions and tags more often
+- Check LeaseSet expiration time
+- Handle NTCP2 session handshakes in separate thread
+- Limit last decline time by 1.5 hours in router's profile
+- Don't handle RelayRequest and RelayIntro with same nonce twice
+- Increased hole punch expiration interval
+- Send peer test message 6 with delay if message 4 was received before message 5
+- Pre-calculate more x25519 keys for transports in runtime
+- Don't request LeaseSet for incoming stream
+- Terminate incoming stream right away if no remote LeaseSet
+- Handle choked, new RTO and window size calculation and resetting algorithm for streams
+### Fixed
+- Empty string in addressbook subscriptions
+- ECIESx25519 sessions without destination
+- Missing RouterInfo buffer in NetDb
+- Invalid I2PControl certificate
+- Routers disappear from NetDb when offline
+- Peer test message 6 sent to unknown endpoint
+- Race condition with LeaseSet update
+- Excessive CPU usage by streams
+- Crash on shutdown
+
 ## [2.54.0] - 2024-10-06
 ### Added
 - Maintain recently connected routers list to avoid false-positive peer test

contrib/debian/trusty/patches/01-upnp.patch

@@ -2,13 +2,13 @@ Description: Enable UPnP usage in package
 Author: r4sas <r4sas@i2pmail.org>
 
 Reviewed-By: r4sas <r4sas@i2pmail.org>
-Last-Update: 2022-03-23
+Last-Update: 2024-12-30
 
 --- i2pd.orig/Makefile
 +++ i2pd/Makefile
-@@ -31,7 +31,7 @@ include filelist.mk
+@@ -31,7 +31,7 @@ # import source files lists
+ include filelist.mk
  
- USE_AESNI       := $(or $(USE_AESNI),yes)
  USE_STATIC      := $(or $(USE_STATIC),no)
 -USE_UPNP        := $(or $(USE_UPNP),no)
 +USE_UPNP        := $(or $(USE_UPNP),yes)

contrib/debian/xenial/patches/01-upnp.patch

@@ -2,13 +2,13 @@ Description: Enable UPnP usage in package
 Author: r4sas <r4sas@i2pmail.org>
 
 Reviewed-By: r4sas <r4sas@i2pmail.org>
-Last-Update: 2022-03-23
+Last-Update: 2024-12-30
 
 --- i2pd.orig/Makefile
 +++ i2pd/Makefile
-@@ -31,7 +31,7 @@ include filelist.mk
+@@ -31,7 +31,7 @@ # import source files lists
+ include filelist.mk
  
- USE_AESNI       := $(or $(USE_AESNI),yes)
  USE_STATIC      := $(or $(USE_STATIC),no)
 -USE_UPNP        := $(or $(USE_UPNP),no)
 +USE_UPNP        := $(or $(USE_UPNP),yes)

contrib/rpm/i2pd-git.spec

@@ -1,7 +1,7 @@
 %define git_hash %(git rev-parse HEAD | cut -c -7)
 
 Name:          i2pd-git
-Version:       2.54.0
+Version:       2.55.0
 Release:       git%{git_hash}%{?dist}
 Summary:       I2P router written in C++
 Conflicts:     i2pd
@@ -148,6 +148,9 @@ getent passwd i2pd >/dev/null || \
 
 
 %changelog
+* Mon Dec 30 2024 orignal <orignal@i2pmail.org> - 2.55.0
+- update to 2.55.0
+
 * Sun Oct 6 2024 orignal <orignal@i2pmail.org> - 2.54.0
 - update to 2.54.0
 

contrib/rpm/i2pd.spec

@@ -1,5 +1,5 @@
 Name:          i2pd
-Version:       2.54.0
+Version:       2.55.0
 Release:       1%{?dist}
 Summary:       I2P router written in C++
 Conflicts:     i2pd-git
@@ -146,6 +146,9 @@ getent passwd i2pd >/dev/null || \
 
 
 %changelog
+* Mon Dec 30 2024 orignal <orignal@i2pmail.org> - 2.55.0
+- update to 2.55.0
+
 * Sun Oct 6 2024 orignal <orignal@i2pmail.org> - 2.54.0
 - update to 2.54.0
 

daemon/HTTPServer.cpp

@@ -826,7 +826,7 @@ namespace http {
 		if (i2p::tunnel::tunnels.CountTransitTunnels())
 		{
 			s << "<b>" << tr("Transit Tunnels") << ":</b><br>\r\n";
-			s << "<table><thead><th>&#8658;</th><th>ID</th><th>&#8658;</th><th>" << tr("Amount") << "</th></thead><tbody class=\"tableitem\">";
+			s << "<table><thead><th>&#8658;</th><th>ID</th><th>&#8658;</th><th>" << tr("Amount") << "</th><th>" << tr("Next") << "</th></thead><tbody class=\"tableitem\">";
 			for (const auto& it: i2p::tunnel::tunnels.GetTransitTunnels ())
 			{
 				if (std::dynamic_pointer_cast<i2p::tunnel::TransitTunnelGateway>(it))
@@ -836,7 +836,7 @@ namespace http {
 				else
 					s << "<tr><td>&#8658;</td><td>" << it->GetTunnelID () << "</td><td>&#8658;</td><td>";
 				ShowTraffic(s, it->GetNumTransmittedBytes ());
-				s << "</td></tr>\r\n";
+				s << "</td><td>" << it->GetNextPeerName () << "</td></tr>\r\n";
 			}
 			s << "</tbody></table>\r\n";
 		}

debian/changelog

@@ -1,3 +1,9 @@
+i2pd (2.55.0-1) unstable; urgency=medium
+
+  * updated to version 2.55.0
+
+ -- orignal <orignal@i2pmail.org>  Mon, 30 Dec 2024 16:00:00 +0000
+
 i2pd (2.54.0-1) unstable; urgency=medium
 
   * updated to version 2.54.0/0.9.64

debian/patches/01-upnp.patch

@@ -2,13 +2,13 @@ Description: Enable UPnP usage in package
 Author: r4sas <r4sas@i2pmail.org>
 
 Reviewed-By: r4sas <r4sas@i2pmail.org>
-Last-Update: 2022-03-23
+Last-Update: 2024-12-30
 
 --- i2pd.orig/Makefile
 +++ i2pd/Makefile
-@@ -31,7 +31,7 @@ include filelist.mk
+@@ -31,7 +31,7 @@ # import source files lists
+ include filelist.mk
  
- USE_AESNI       := $(or $(USE_AESNI),yes)
  USE_STATIC      := $(or $(USE_STATIC),no)
 -USE_UPNP        := $(or $(USE_UPNP),no)
 +USE_UPNP        := $(or $(USE_UPNP),yes)

libi2pd/Destination.cpp

@@ -833,7 +833,7 @@ namespace client
 			request->requestedBlindedKey = requestedBlindedKey; // for encrypted LeaseSet2
 			if (requestComplete)
 				request->requestComplete.push_back (requestComplete);
-			auto ts = i2p::util::GetSecondsSinceEpoch ();
+			auto ts = i2p::util::GetMillisecondsSinceEpoch ();
 			auto ret = m_LeaseSetRequests.insert (std::pair<i2p::data::IdentHash, std::shared_ptr<LeaseSetRequest> >(dest,request));
 			if (ret.second) // inserted
 			{
@@ -916,7 +916,7 @@ namespace client
 						nextFloodfill->GetIdentHash (), 0, msg
 					}
 				});
-			request->requestTimeoutTimer.expires_from_now (boost::posix_time::seconds(LEASESET_REQUEST_TIMEOUT));
+			request->requestTimeoutTimer.expires_from_now (boost::posix_time::milliseconds(LEASESET_REQUEST_TIMEOUT));
 			request->requestTimeoutTimer.async_wait (std::bind (&LeaseSetDestination::HandleRequestTimoutTimer,
 				shared_from_this (), std::placeholders::_1, dest));
 		}
@@ -933,7 +933,7 @@ namespace client
 			if (it != m_LeaseSetRequests.end ())
 			{
 				bool done = false;
-				uint64_t ts = i2p::util::GetSecondsSinceEpoch ();
+				uint64_t ts = i2p::util::GetMillisecondsSinceEpoch ();
 				if (ts < it->second->requestTime + MAX_LEASESET_REQUEST_TIMEOUT)
 				{
 					auto floodfill = i2p::data::netdb.GetClosestFloodfill (dest, it->second->excluded);

libi2pd/Destination.h

@@ -40,8 +40,8 @@ namespace client
 	const int PUBLISH_VERIFICATION_TIMEOUT = 10; // in seconds after successful publish
 	const int PUBLISH_MIN_INTERVAL = 20; // in seconds
 	const int PUBLISH_REGULAR_VERIFICATION_INTERNAL = 100; // in seconds periodically
-	const int LEASESET_REQUEST_TIMEOUT = 5; // in seconds
-	const int MAX_LEASESET_REQUEST_TIMEOUT = 40; // in seconds
+	const int LEASESET_REQUEST_TIMEOUT = 1600; // in milliseconds
+	const int MAX_LEASESET_REQUEST_TIMEOUT = 12000; // in milliseconds
 	const int DESTINATION_CLEANUP_TIMEOUT = 44; // in seconds
 	const int DESTINATION_CLEANUP_TIMEOUT_VARIANCE = 30; // in seconds
 	const unsigned int MAX_NUM_FLOODFILLS_PER_REQUEST = 7;

libi2pd/NTCP2.cpp

@@ -1435,6 +1435,12 @@ namespace transport
 			boost::asio::post (m_Server.GetService (), std::bind (&NTCP2Session::SendRouterInfo, shared_from_this ()));
 	}
 
+	i2p::data::RouterInfo::SupportedTransports NTCP2Session::GetTransportType () const
+	{
+		if (m_RemoteEndpoint.address ().is_v4 ()) return i2p::data::RouterInfo::eNTCP2V4;
+		return i2p::util::net::IsYggdrasilAddress (m_RemoteEndpoint.address ()) ? i2p::data::RouterInfo::eNTCP2V6Mesh : i2p::data::RouterInfo::eNTCP2V6;
+	}	
+		
 	NTCP2Server::NTCP2Server ():
 		RunnableServiceWithWork ("NTCP2"), m_TerminationTimer (GetService ()),
 		m_ProxyType(eNoProxy), m_Resolver(GetService ()),
@@ -1544,6 +1550,7 @@ namespace transport
 
 	void NTCP2Server::Stop ()
 	{
+		m_EstablisherService.Stop ();
 		{
 			// we have to copy it because Terminate changes m_NTCP2Sessions
 			auto ntcpSessions = m_NTCP2Sessions;
@@ -1559,7 +1566,6 @@ namespace transport
 			m_TerminationTimer.cancel ();
 			m_ProxyEndpoint = nullptr;
 		}
-		m_EstablisherService.Stop ();
 		StopIOService ();
 	}
 

libi2pd/NTCP2.h

@@ -147,6 +147,7 @@ namespace transport
 			void SetRemoteEndpoint (const boost::asio::ip::tcp::endpoint& ep) { m_RemoteEndpoint = ep; };
 
 			bool IsEstablished () const override { return m_IsEstablished; };
+			i2p::data::RouterInfo::SupportedTransports GetTransportType () const override;
 			bool IsTerminated () const { return m_IsTerminated; };
 
 			void ClientLogin (); // Alice

libi2pd/NetDbRequests.cpp

@@ -21,7 +21,7 @@ namespace data
 {
 	RequestedDestination::RequestedDestination (const IdentHash& destination, bool isExploratory, bool direct):
 		m_Destination (destination), m_IsExploratory (isExploratory), m_IsDirect (direct), m_IsActive (true),
-		m_CreationTime (i2p::util::GetSecondsSinceEpoch ()), m_LastRequestTime (0), m_NumAttempts (0)
+		m_CreationTime (i2p::util::GetMillisecondsSinceEpoch ()), m_LastRequestTime (0), m_NumAttempts (0)
 	{
 		if (i2p::context.IsFloodfill ())
 			m_ExcludedPeers.insert (i2p::context.GetIdentHash ()); // exclude self if floodfill
@@ -44,7 +44,7 @@ namespace data
 			msg = i2p::CreateRouterInfoDatabaseLookupMsg(m_Destination, i2p::context.GetIdentHash(), 0, m_IsExploratory, &m_ExcludedPeers);
 		if(router)
 			m_ExcludedPeers.insert (router->GetIdentHash ());
-		m_LastRequestTime = i2p::util::GetSecondsSinceEpoch ();
+		m_LastRequestTime = i2p::util::GetMillisecondsSinceEpoch ();
 		m_NumAttempts++;
 		return msg;
 	}
@@ -55,7 +55,7 @@ namespace data
 			i2p::context.GetRouterInfo ().GetIdentHash () , 0, false, &m_ExcludedPeers);
 		m_ExcludedPeers.insert (floodfill);
 		m_NumAttempts++;
-		m_LastRequestTime = i2p::util::GetSecondsSinceEpoch ();
+		m_LastRequestTime = i2p::util::GetMillisecondsSinceEpoch ();
 		return msg;
 	}
 
@@ -210,7 +210,7 @@ namespace data
 
 	void NetDbRequests::ManageRequests ()
 	{
-		uint64_t ts = i2p::util::GetSecondsSinceEpoch ();
+		uint64_t ts = i2p::util::GetMillisecondsSinceEpoch ();
 		for (auto it = m_RequestedDestinations.begin (); it != m_RequestedDestinations.end ();)
 		{
 			auto& dest = it->second;
@@ -328,7 +328,8 @@ namespace data
 
 	void NetDbRequests::ScheduleManageRequests ()
 	{
-		m_ManageRequestsTimer.expires_from_now (boost::posix_time::seconds(MANAGE_REQUESTS_INTERVAL));
+		m_ManageRequestsTimer.expires_from_now (boost::posix_time::milliseconds(MANAGE_REQUESTS_INTERVAL +
+			m_Rng () % MANAGE_REQUESTS_INTERVAL_VARIANCE));
 		m_ManageRequestsTimer.async_wait (std::bind (&NetDbRequests::HandleManageRequestsTimer,
 			this, std::placeholders::_1));
 	}

libi2pd/NetDbRequests.h

@@ -24,15 +24,16 @@ namespace i2p
 namespace data
 {
 	const int MAX_NUM_REQUEST_ATTEMPTS = 5;
-	const uint64_t MANAGE_REQUESTS_INTERVAL = 1; // in seconds
-	const uint64_t MIN_REQUEST_TIME = 5; // in seconds
-	const uint64_t MAX_REQUEST_TIME = MAX_NUM_REQUEST_ATTEMPTS * (MIN_REQUEST_TIME + MANAGE_REQUESTS_INTERVAL);
+	const uint64_t MANAGE_REQUESTS_INTERVAL = 400; // in milliseconds
+	const uint64_t MANAGE_REQUESTS_INTERVAL_VARIANCE = 300; // in milliseconds
+	const uint64_t MIN_REQUEST_TIME = 1200; // in milliseconds
+	const uint64_t MAX_REQUEST_TIME = MAX_NUM_REQUEST_ATTEMPTS * (MIN_REQUEST_TIME + MANAGE_REQUESTS_INTERVAL + MANAGE_REQUESTS_INTERVAL_VARIANCE);
 	const uint64_t EXPLORATORY_REQUEST_INTERVAL = 55; // in seconds
 	const uint64_t EXPLORATORY_REQUEST_INTERVAL_VARIANCE = 170; // in seconds 
 	const uint64_t DISCOVERED_REQUEST_INTERVAL = 360; // in milliseconds
 	const uint64_t DISCOVERED_REQUEST_INTERVAL_VARIANCE = 540; // in milliseconds
-	const uint64_t MAX_EXPLORATORY_REQUEST_TIME = 30; // in seconds
-	const uint64_t REQUEST_CACHE_TIME = MAX_REQUEST_TIME + 40; // in seconds
+	const uint64_t MAX_EXPLORATORY_REQUEST_TIME = 30000; // in milliseconds
+	const uint64_t REQUEST_CACHE_TIME = MAX_REQUEST_TIME + 40000; // in milliseconds
 	const uint64_t REQUESTED_DESTINATIONS_POOL_CLEANUP_INTERVAL = 191; // in seconds
 	
 	class RequestedDestination
@@ -71,7 +72,7 @@ namespace data
 			IdentHash m_Destination;
 			bool m_IsExploratory, m_IsDirect, m_IsActive;
 			std::unordered_set<IdentHash> m_ExcludedPeers;
-			uint64_t m_CreationTime, m_LastRequestTime; // in seconds
+			uint64_t m_CreationTime, m_LastRequestTime; // in milliseconds
 			std::list<RequestComplete> m_RequestComplete;
 			int m_NumAttempts;
 	};
@@ -115,9 +116,9 @@ namespace data
 			
 		private:
 
+			i2p::util::MemoryPoolMt<RequestedDestination> m_RequestedDestinationsPool;
 			std::unordered_map<IdentHash, std::shared_ptr<RequestedDestination> > m_RequestedDestinations;
 			std::list<IdentHash> m_DiscoveredRouterHashes;
-			i2p::util::MemoryPoolMt<RequestedDestination> m_RequestedDestinationsPool;
 			boost::asio::deadline_timer m_ManageRequestsTimer, m_ExploratoryTimer,
 				m_CleanupTimer, m_DiscoveredRoutersTimer;
 			std::mt19937 m_Rng;

libi2pd/RouterInfo.cpp

@@ -1195,6 +1195,19 @@ namespace data
 				return false;
 		}
 	}
+
+	std::string RouterInfo::GetTransportName (SupportedTransports tr)
+	{
+		switch (tr)
+		{
+			case eNTCP2V4: return "NTCP2V4";
+			case eNTCP2V6: return "NTCP2V6";
+			case eSSU2V4: return "SSU2V4";
+			case eSSU2V6: return "SSU2V6";
+			case eNTCP2V6Mesh: return "Mesh";
+			default: return "";
+		}
+	}	
 		
 	void LocalRouterInfo::CreateBuffer (const PrivateKeys& privateKeys)
 	{

libi2pd/RouterInfo.h

@@ -363,6 +363,10 @@ namespace data
 			int m_Version;
 			Congestion m_Congestion;
 			mutable std::shared_ptr<RouterProfile> m_Profile;
+
+		public:
+
+			static std::string GetTransportName (SupportedTransports tr);
 	};
 
 	class LocalRouterInfo: public RouterInfo

libi2pd/SSU2Session.cpp

@@ -3114,5 +3114,10 @@ namespace transport
 		else if (!sent && !m_SentPackets.empty ()) // if only acks received, nothing sent and we still have something to resend
 			Resend (i2p::util::GetMillisecondsSinceEpoch ()); // than right time to resend
 	}
+
+	i2p::data::RouterInfo::SupportedTransports SSU2Session::GetTransportType () const
+	{
+		return m_RemoteEndpoint.address ().is_v4 () ? i2p::data::RouterInfo::eSSU2V4 : i2p::data::RouterInfo::eSSU2V6;
+	}	
 }
 }

libi2pd/SSU2Session.h

@@ -267,6 +267,7 @@ namespace transport
 			size_t Resend (uint64_t ts); // return number of resent packets
 			uint64_t GetLastResendTime () const { return m_LastResendTime; };
 			bool IsEstablished () const override { return m_State == eSSU2SessionStateEstablished; };
+			i2p::data::RouterInfo::SupportedTransports GetTransportType () const override;
 			uint64_t GetConnID () const { return m_SourceConnID; };
 			SSU2SessionState GetState () const { return m_State; };
 			void SetState (SSU2SessionState state) { m_State = state; };

libi2pd/TransitTunnel.cpp

@@ -10,6 +10,8 @@
 #include "I2PEndian.h"
 #include "Crypto.h"
 #include "Log.h"
+#include "Identity.h"
+#include "RouterInfo.h"
 #include "RouterContext.h"
 #include "I2NPProtocol.h"
 #include "Garlic.h"
@@ -41,6 +43,21 @@ namespace tunnel
 		i2p::transport::transports.UpdateTotalTransitTransmittedBytes (TUNNEL_DATA_MSG_SIZE);
 	}
 
+	std::string TransitTunnel::GetNextPeerName () const
+	{
+		return i2p::data::GetIdentHashAbbreviation (GetNextIdentHash ());
+	}	
+
+	void TransitTunnel::SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg)
+	{
+		LogPrint (eLogError, "TransitTunnel: We are not a gateway for ", GetTunnelID ());
+	}
+
+	void TransitTunnel::HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg)
+	{
+		LogPrint (eLogError, "TransitTunnel: Incoming tunnel message is not supported ", GetTunnelID ());
+	}
+		
 	TransitTunnelParticipant::~TransitTunnelParticipant ()
 	{
 	}
@@ -67,16 +84,18 @@ namespace tunnel
 		}
 	}
 
-	void TransitTunnel::SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg)
+	std::string TransitTunnelParticipant::GetNextPeerName () const
 	{
-		LogPrint (eLogError, "TransitTunnel: We are not a gateway for ", GetTunnelID ());
-	}
-
-	void TransitTunnel::HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg)
-	{
-		LogPrint (eLogError, "TransitTunnel: Incoming tunnel message is not supported ", GetTunnelID ());
-	}
-
+		if (m_Sender)
+		{
+			auto transport = m_Sender->GetCurrentTransport ();
+			if (transport)
+				return TransitTunnel::GetNextPeerName () + "-" + 
+					i2p::data::RouterInfo::GetTransportName (transport->GetTransportType ());
+		}	
+		return TransitTunnel::GetNextPeerName ();
+	}	
+		
 	void TransitTunnelGateway::SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg)
 	{
 		TunnelMessageBlock block;
@@ -92,6 +111,19 @@ namespace tunnel
 		m_Gateway.SendBuffer ();
 	}
 
+	std::string TransitTunnelGateway::GetNextPeerName () const
+	{
+		const auto& sender = m_Gateway.GetSender ();
+		if (sender)
+		{
+			auto transport = sender->GetCurrentTransport ();
+			if (transport)
+				return TransitTunnel::GetNextPeerName () + "-" + 
+					i2p::data::RouterInfo::GetTransportName (transport->GetTransportType ());
+		}	
+		return TransitTunnel::GetNextPeerName ();
+	}	
+		
 	void TransitTunnelEndpoint::HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg)
 	{
 		auto newMsg = CreateEmptyTunnelDataMsg (true);
@@ -101,6 +133,30 @@ namespace tunnel
 		m_Endpoint.HandleDecryptedTunnelDataMsg (newMsg);
 	}
 
+	void TransitTunnelEndpoint::FlushTunnelDataMsgs ()
+	{
+		m_Endpoint.FlushI2NPMsgs ();
+	}	
+
+	std::string TransitTunnelEndpoint::GetNextPeerName () const
+	{ 
+		auto hash = m_Endpoint.GetCurrentHash ();
+		if (hash)
+		{	
+			const auto& sender = m_Endpoint.GetSender ();
+			if (sender)
+			{
+				auto transport = sender->GetCurrentTransport ();
+				if (transport)
+					return i2p::data::GetIdentHashAbbreviation (*hash) + "-" + 
+						i2p::data::RouterInfo::GetTransportName (transport->GetTransportType ());
+				else
+					return i2p::data::GetIdentHashAbbreviation (*hash);
+			}	
+		}
+		return "";
+	}	
+		
 	std::shared_ptr<TransitTunnel> CreateTransitTunnel (uint32_t receiveTunnelID,
 		const i2p::data::IdentHash& nextIdent, uint32_t nextTunnelID,
 		const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey,

libi2pd/TransitTunnel.h

@@ -33,11 +33,13 @@ namespace tunnel
 				const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey);
 
 			virtual size_t GetNumTransmittedBytes () const { return 0; };
+			virtual std::string GetNextPeerName () const;
 
 			// implements TunnelBase
 			void SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg) override;
 			void HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg) override;
 			void EncryptTunnelMsg (std::shared_ptr<const I2NPMessage> in, std::shared_ptr<I2NPMessage> out) override;
+		
 		private:
 
 			i2p::crypto::AESKey m_LayerKey, m_IVKey;
@@ -56,6 +58,7 @@ namespace tunnel
 			~TransitTunnelParticipant ();
 
 			size_t GetNumTransmittedBytes () const override { return m_NumTransmittedBytes; };
+			std::string GetNextPeerName () const override;
 			void HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg) override;
 			void FlushTunnelDataMsgs () override;
 
@@ -79,7 +82,8 @@ namespace tunnel
 			void SendTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage> msg) override;
 			void FlushTunnelDataMsgs () override;
 			size_t GetNumTransmittedBytes () const override { return m_Gateway.GetNumSentBytes (); };
-
+			std::string GetNextPeerName () const override;
+			
 		private:
 
 			std::mutex m_SendMutex;
@@ -97,10 +101,12 @@ namespace tunnel
 				m_Endpoint (false) {}; // transit endpoint is always outbound
 
 			void Cleanup () override { m_Endpoint.Cleanup (); }
-
+		
 			void HandleTunnelDataMsg (std::shared_ptr<i2p::I2NPMessage>&& tunnelMsg) override;
+			void FlushTunnelDataMsgs () override;
 			size_t GetNumTransmittedBytes () const override { return m_Endpoint.GetNumReceivedBytes (); }
-
+			std::string GetNextPeerName () const override;
+			
 		private:
 
 			TunnelEndpoint m_Endpoint;

libi2pd/TransportSession.h

@@ -151,6 +151,7 @@ namespace transport
 			};
 			virtual void SendI2NPMessages (std::list<std::shared_ptr<I2NPMessage> >& msgs) = 0;
 			virtual bool IsEstablished () const = 0;
+			virtual i2p::data::RouterInfo::SupportedTransports GetTransportType () const = 0;
 
 		private:
 

libi2pd/Transports.cpp

@@ -55,6 +55,13 @@ namespace transport
 			m_Thread->join ();
 			m_Thread = nullptr;
 		}
+		if (!m_Queue.empty ())
+		{
+			// clean up queue
+			std::queue<std::shared_ptr<Keys> > tmp;
+	   		std::swap (m_Queue, tmp);
+		}
+		m_KeysPool.CleanUpMt ();
 	}
 
 	template<typename Keys>

libi2pd/Transports.h

@@ -54,8 +54,8 @@ namespace transport
 		private:
 
 			const int m_QueueSize;
-			std::queue<std::shared_ptr<Keys> > m_Queue;
 			i2p::util::MemoryPoolMt<Keys> m_KeysPool;
+			std::queue<std::shared_ptr<Keys> > m_Queue;
 
 			bool m_IsRunning;
 			std::unique_ptr<std::thread> m_Thread;

libi2pd/Tunnel.h

@@ -296,6 +296,8 @@ namespace tunnel
 
 			bool m_IsRunning;
 			std::thread * m_Thread;
+			i2p::util::MemoryPoolMt<I2NPMessageBuffer<I2NP_TUNNEL_ENPOINT_MESSAGE_SIZE> > m_I2NPTunnelEndpointMessagesMemoryPool;
+			i2p::util::MemoryPoolMt<I2NPMessageBuffer<I2NP_TUNNEL_MESSAGE_SIZE> > m_I2NPTunnelMessagesMemoryPool;
 			std::map<uint32_t, std::shared_ptr<InboundTunnel> > m_PendingInboundTunnels; // by replyMsgID
 			std::map<uint32_t, std::shared_ptr<OutboundTunnel> > m_PendingOutboundTunnels; // by replyMsgID
 			std::list<std::shared_ptr<InboundTunnel> > m_InboundTunnels;
@@ -306,8 +308,6 @@ namespace tunnel
 			std::list<std::shared_ptr<TunnelPool>> m_Pools;
 			std::shared_ptr<TunnelPool> m_ExploratoryPool;
 			i2p::util::Queue<std::shared_ptr<I2NPMessage> > m_Queue;
-			i2p::util::MemoryPoolMt<I2NPMessageBuffer<I2NP_TUNNEL_ENPOINT_MESSAGE_SIZE> > m_I2NPTunnelEndpointMessagesMemoryPool;
-			i2p::util::MemoryPoolMt<I2NPMessageBuffer<I2NP_TUNNEL_MESSAGE_SIZE> > m_I2NPTunnelMessagesMemoryPool;
 			uint32_t m_MaxNumTransitTunnels;
 			// count of tunnels for total TCSR algorithm
 			int m_TotalNumSuccesiveTunnelCreations, m_TotalNumFailedTunnelCreations;

libi2pd/TunnelBase.cpp

@@ -60,5 +60,12 @@ namespace tunnel
 		msgs.swap (msgs1);
 		SendMessagesTo (to, std::move (msgs1));
 	}	
+
+	void TunnelTransportSender::Reset ()
+	{
+		m_CurrentTransport.reset ();
+		if (m_PendingTransport.valid ())
+			m_PendingTransport = std::future<std::shared_ptr<i2p::transport::TransportSession> >();
+	}	
 }
 }

libi2pd/TunnelBase.h

@@ -93,6 +93,9 @@ namespace tunnel
 
 			void SendMessagesTo (const i2p::data::IdentHash& to, std::list<std::shared_ptr<I2NPMessage> >&& msgs);
 			void SendMessagesTo (const i2p::data::IdentHash& to, std::list<std::shared_ptr<I2NPMessage> >& msgs); // send and clear
+
+			std::shared_ptr<const i2p::transport::TransportSession> GetCurrentTransport () const { return m_CurrentTransport.lock (); }
+			void Reset ();
 			
 		private:
 			

libi2pd/TunnelEndpoint.cpp

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2023, The PurpleI2P Project
+* Copyright (c) 2013-2024, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
@@ -21,10 +21,7 @@ namespace i2p
 {
 namespace tunnel
 {
-	TunnelEndpoint::~TunnelEndpoint ()
-	{
-	}
-
+	
 	void TunnelEndpoint::HandleDecryptedTunnelDataMsg (std::shared_ptr<I2NPMessage> msg)
 	{
 		m_NumReceivedBytes += TUNNEL_DATA_MSG_SIZE;
@@ -331,13 +328,13 @@ namespace tunnel
 			break;
 			case eDeliveryTypeTunnel:
 				if (!m_IsInbound) // outbound transit tunnel
-					i2p::transport::transports.SendMessage (msg.hash, i2p::CreateTunnelGatewayMsg (msg.tunnelID, msg.data));
+					SendMessageTo (msg.hash, i2p::CreateTunnelGatewayMsg (msg.tunnelID, msg.data));
 				else
 					LogPrint (eLogError, "TunnelMessage: Delivery type 'tunnel' arrived from an inbound tunnel, dropped");
 			break;
 			case eDeliveryTypeRouter:
 				if (!m_IsInbound) // outbound transit tunnel
-					i2p::transport::transports.SendMessage (msg.hash, msg.data);
+					i2p::transport::transports.SendMessage (msg.hash, msg.data); // send right away, because most likely it's single message
 				else // we shouldn't send this message. possible leakage
 					LogPrint (eLogError, "TunnelMessage: Delivery type 'router' arrived from an inbound tunnel, dropped");
 			break;
@@ -366,5 +363,35 @@ namespace tunnel
 				++it;
 		}
 	}
+
+	void TunnelEndpoint::SendMessageTo (const i2p::data::IdentHash& to, std::shared_ptr<i2p::I2NPMessage> msg)
+	{	
+		if (msg)
+		{	
+			if (!m_Sender && m_I2NPMsgs.empty ()) // first message
+				m_CurrentHash = to;
+			else if (m_CurrentHash != to) // new target router
+			{
+				FlushI2NPMsgs (); //  flush message to previous
+				if (m_Sender) m_Sender->Reset (); // reset sender
+				m_CurrentHash = to; // set new target router
+			}	// otherwise add msg to the list for current target router
+			m_I2NPMsgs.push_back (msg);
+		}	
+	}
+	
+	void TunnelEndpoint::FlushI2NPMsgs ()
+	{
+		if (!m_I2NPMsgs.empty ())
+		{
+			if (!m_Sender) m_Sender = std::make_unique<TunnelTransportSender>();
+			m_Sender->SendMessagesTo (m_CurrentHash, m_I2NPMsgs); // send and clear
+		}	
+	}	
+
+	const i2p::data::IdentHash * TunnelEndpoint::GetCurrentHash () const
+	{
+		return (m_Sender || !m_I2NPMsgs.empty ()) ? &m_CurrentHash : nullptr;
+	}	
 }
 }

libi2pd/TunnelEndpoint.h

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2021, The PurpleI2P Project
+* Copyright (c) 2013-2024, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
@@ -11,8 +11,10 @@
 
 #include <inttypes.h>
 #include <vector>
+#include <list>
 #include <string>
 #include <unordered_map>
+#include <memory>
 #include "I2NPProtocol.h"
 #include "TunnelBase.h"
 
@@ -20,7 +22,7 @@ namespace i2p
 {
 namespace tunnel
 {
-	class TunnelEndpoint
+	class TunnelEndpoint final
 	{
 		struct TunnelMessageBlockEx: public TunnelMessageBlock
 		{
@@ -39,18 +41,23 @@ namespace tunnel
 		public:
 
 			TunnelEndpoint (bool isInbound): m_IsInbound (isInbound), m_NumReceivedBytes (0), m_CurrentMsgID (0) {};
-			~TunnelEndpoint ();
+			~TunnelEndpoint () = default;
 			size_t GetNumReceivedBytes () const { return m_NumReceivedBytes; };
 			void Cleanup ();
 
 			void HandleDecryptedTunnelDataMsg (std::shared_ptr<I2NPMessage> msg);
+			void FlushI2NPMsgs (); 
 
+			const i2p::data::IdentHash * GetCurrentHash () const; // return null if not avaiable
+			const std::unique_ptr<TunnelTransportSender>& GetSender () const { return m_Sender; };
+		
 		private:
 
 			void HandleFollowOnFragment (uint32_t msgID, bool isLastFragment, uint8_t fragmentNum, const uint8_t * fragment, size_t size);
 			bool ConcatFollowOnFragment (TunnelMessageBlockEx& msg, const uint8_t * fragment, size_t size) const; // true if success
 			void HandleCurrenMessageFollowOnFragment (const uint8_t * fragment, size_t size, bool isLastFragment);
 			void HandleNextMessage (const TunnelMessageBlock& msg);
+			void SendMessageTo (const i2p::data::IdentHash& to, std::shared_ptr<i2p::I2NPMessage> msg);
 
 			void AddOutOfSequenceFragment (uint32_t msgID, uint8_t fragmentNum, bool isLastFragment, const uint8_t * fragment, size_t size);
 			bool ConcatNextOutOfSequenceFragment (uint32_t msgID, TunnelMessageBlockEx& msg); // true if something added
@@ -65,6 +72,10 @@ namespace tunnel
 			size_t m_NumReceivedBytes;
 			TunnelMessageBlockEx m_CurrentMessage;
 			uint32_t m_CurrentMsgID;
+			// I2NP messages to send
+			std::list<std::shared_ptr<i2p::I2NPMessage> > m_I2NPMsgs; // to send
+			i2p::data::IdentHash m_CurrentHash; // send msgs to
+			std::unique_ptr<TunnelTransportSender> m_Sender;
 	};
 }
 }

libi2pd/TunnelGateway.h

@@ -51,6 +51,7 @@ namespace tunnel
 			void PutTunnelDataMsg (const TunnelMessageBlock& block);
 			void SendBuffer ();
 			size_t GetNumSentBytes () const { return m_NumSentBytes; };
+			const std::unique_ptr<TunnelTransportSender>& GetSender () const { return m_Sender; };
 
 		private:
 

libi2pd/version.h

@@ -18,7 +18,7 @@
 #define MAKE_VERSION_NUMBER(a,b,c) ((a*100+b)*100+c)
 
 #define I2PD_VERSION_MAJOR 2
-#define I2PD_VERSION_MINOR 54
+#define I2PD_VERSION_MINOR 55
 #define I2PD_VERSION_MICRO 0
 #define I2PD_VERSION_PATCH 0
 #ifdef GITVER