Merge pull request #1556 from PurpleI2P/openssl

recent changes
2025-01-16 18:59:56 +00:00 · 2020-10-10 21:22:00 -04:00 · 2020-10-10 21:22:00 -04:00 · 260564345a
commit 260564345a
parent 305a654a37 e2a1cd12c3
42 changed files with 539 additions and 2096 deletions
--- a/Makefile.linux
+++ b/Makefile.linux
@ -15,7 +15,7 @@ ifeq ($(shell expr match $(CXX) 'clang'),5)
 	NEEDED_CXXFLAGS += -std=c++11
 else ifeq ($(shell expr match ${CXXVER} "4\.[0-9][0-9]"),4) # gcc >= 4.10
 	NEEDED_CXXFLAGS += -std=c++11
-else ifeq ($(shell expr match ${CXXVER} "4\.[7-9]"),3) # gcc 4.7 - 4.9
+else ifeq ($(shell expr match ${CXXVER} "4\.[8-9]"),3) # gcc 4.8 - 4.9
 	NEEDED_CXXFLAGS += -std=c++11 -D_GLIBCXX_USE_NANOSLEEP=1
 else ifeq ($(shell expr match ${CXXVER} "[5-6]"),1) # gcc 5 - 6
 	NEEDED_CXXFLAGS += -std=c++11
--- a/Win32/Win32NetState.h
+++ b/Win32/Win32NetState.h
@ -31,7 +31,8 @@ public:
 		} else {
 			Result = E_NOINTERFACE;
 		}
-
+		AddRef();
+		
 		return Result;
 	}

@ -90,4 +91,4 @@ void SubscribeToEvents() { }
 void UnSubscribeFromEvents() { }

 #endif // WINVER
-#endif
+#endif
--- a/appveyor.yml
+++ b/appveyor.yml
@ -21,11 +21,25 @@ environment:
    MSYS_BITNESS: 32

 install:
+# install new signing keyring
+- c:\msys64\usr\bin\bash -lc "curl -O https://mirror.selfnet.de/msys2/msys/x86_64/msys2-keyring-r21.b39fb11-1-any.pkg.tar.xz"
+- c:\msys64\usr\bin\bash -lc "curl -O https://mirror.selfnet.de/msys2/msys/x86_64/msys2-keyring-r21.b39fb11-1-any.pkg.tar.xz.sig"
+- c:\msys64\usr\bin\bash -lc "pacman-key --verify msys2-keyring-r21.b39fb11-1-any.pkg.tar.xz.sig"
+- c:\msys64\usr\bin\bash -lc "pacman --noconfirm -U msys2-keyring-r21.b39fb11-1-any.pkg.tar.xz"
+# disable inaccessible miror (something block sed from changing files, so rewrite them) - https://github.com/msys2/MINGW-packages/issues/7084
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/mingw/x86_64/' > /etc/pacman.d/mirrorlist.mingw64"
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/mingw/i686/' > /etc/pacman.d/mirrorlist.mingw32"
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/msys/$arch/' > /etc/pacman.d/mirrorlist.msys"
+# remove packages which can break build
 - c:\msys64\usr\bin\bash -lc "pacman --noconfirm -Rns gcc-fortran gcc mingw-w64-{i686,x86_64}-gcc-ada mingw-w64-{i686,x86_64}-gcc-objc"
-# TODO: revert that change when appveyor's images will be updated
- c:\msys64\usr\bin\bash -l "build/appveyor-msys2-upgrade.bash"
 # update runtime
 - c:\msys64\usr\bin\bash -lc "pacman --noconfirm -Syuu"
+# Kill bash before next try
+- taskkill /T /F /IM bash.exe /IM gpg.exe /IM gpg-agent.exe | exit /B 0
+# rewrite mirrorlist again because pacman update can rewrite it
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/mingw/x86_64/' > /etc/pacman.d/mirrorlist.mingw64"
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/mingw/i686/' > /etc/pacman.d/mirrorlist.mingw32"
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/msys/$arch/' > /etc/pacman.d/mirrorlist.msys"
 # update packages and install required
 - c:\msys64\usr\bin\bash -lc "pacman --noconfirm -Syuu ${MSYS_PACKAGES}"

--- a/build/CMakeLists.txt
+++ b/build/CMakeLists.txt
@ -68,7 +68,6 @@ set(LIBI2PD_SRC
  "${LIBI2PD_SRC_DIR}/NetDb.cpp"
  "${LIBI2PD_SRC_DIR}/NetDbRequests.cpp"
  "${LIBI2PD_SRC_DIR}/NTCP2.cpp"
-  "${LIBI2PD_SRC_DIR}/NTCPSession.cpp"
  "${LIBI2PD_SRC_DIR}/Poly1305.cpp"
  "${LIBI2PD_SRC_DIR}/Profiling.cpp"
  "${LIBI2PD_SRC_DIR}/Reseed.cpp"
--- a/daemon/Daemon.cpp
+++ b/daemon/Daemon.cpp
@ -17,7 +17,6 @@
 #include "Base.h"
 #include "version.h"
 #include "Transports.h"
-#include "NTCPSession.h"
 #include "RouterInfo.h"
 #include "RouterContext.h"
 #include "Tunnel.h"
@ -135,8 +134,8 @@ namespace i2p
 			i2p::context.SetNetID (netID);
 			i2p::context.Init ();

-			bool ipv6; i2p::config::GetOption("ipv6", ipv6);
-			bool ipv4; i2p::config::GetOption("ipv4", ipv4);
+			bool ipv6;		i2p::config::GetOption("ipv6", ipv6);
+			bool ipv4;		i2p::config::GetOption("ipv4", ipv4);
 #ifdef MESHNET
 			// manual override for meshnet
 			ipv4 = false;
@ -151,8 +150,7 @@ namespace i2p
 			i2p::context.SetSupportsV6 (ipv6);
 			i2p::context.SetSupportsV4 (ipv4);

-			bool ntcp; i2p::config::GetOption("ntcp", ntcp);
-			i2p::context.PublishNTCPAddress (ntcp, !ipv6);
+			i2p::context.RemoveNTCPAddress (!ipv6); // TODO: remove later 
 			bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
 			if (ntcp2)
 			{
@ -160,7 +158,7 @@ namespace i2p
 				if (published)
 				{
 					uint16_t ntcp2port; i2p::config::GetOption("ntcp2.port", ntcp2port);
-					if (!ntcp && !ntcp2port) ntcp2port = port; // use standard port
+					if (!ntcp2port) ntcp2port = port; // use standard port
 					i2p::context.PublishNTCP2Address (ntcp2port, true); // publish
 					if (ipv6)
 					{
@ -180,13 +178,10 @@ namespace i2p
 			SetMaxNumTransitTunnels (transitTunnels);

 			bool isFloodfill; i2p::config::GetOption("floodfill", isFloodfill);
-			if (isFloodfill)
-			{
+			if (isFloodfill) {
 				LogPrint(eLogInfo, "Daemon: router will be floodfill");
 				i2p::context.SetFloodfill (true);
-			}
-			else
-			{
+			}	else {
 				i2p::context.SetFloodfill (false);
 			}

@ -254,8 +249,7 @@ namespace i2p
 					i2p::transport::transports.RestrictRoutesToFamilies(fams);
 					restricted  = fams.size() > 0;
 				}
-				if (routers.length() > 0)
-				{
+				if (routers.length() > 0) {
 					std::set<i2p::data::IdentHash> idents;
 					size_t pos = 0, comma;
 					do
@ -291,8 +285,7 @@ namespace i2p
 			i2p::data::netdb.Start();

 			bool upnp; i2p::config::GetOption("upnp.enabled", upnp);
-			if (upnp)
-			{
+			if (upnp) {
 				d.UPnP = std::unique_ptr<i2p::transport::UPnP>(new i2p::transport::UPnP);
 				d.UPnP->Start ();
 			}
@ -304,16 +297,16 @@ namespace i2p
 				d.m_NTPSync->Start ();
 			}

-			bool ntcp; i2p::config::GetOption("ntcp", ntcp);
-			bool ssu;  i2p::config::GetOption("ssu", ssu);
+			bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
+			bool ssu; i2p::config::GetOption("ssu", ssu);
 			LogPrint(eLogInfo, "Daemon: starting Transports");
 			if(!ssu) LogPrint(eLogInfo, "Daemon: ssu disabled");
-			if(!ntcp) LogPrint(eLogInfo, "Daemon: ntcp disabled");
+			if(!ntcp2) LogPrint(eLogInfo, "Daemon: ntcp2 disabled");

-			i2p::transport::transports.Start(ntcp, ssu);
-			if (i2p::transport::transports.IsBoundNTCP() || i2p::transport::transports.IsBoundSSU() || i2p::transport::transports.IsBoundNTCP2())
+			i2p::transport::transports.Start(ntcp2, ssu);
+			if (i2p::transport::transports.IsBoundSSU() || i2p::transport::transports.IsBoundNTCP2()) 
 				LogPrint(eLogInfo, "Daemon: Transports started");
-			else
+			else 
 			{
 				LogPrint(eLogError, "Daemon: failed to start Transports");
 				/** shut down netdb right away */
@ -323,23 +316,23 @@ namespace i2p
 			}

 			bool http; i2p::config::GetOption("http.enabled", http);
-			if (http)
-			{
+			if (http) {
 				std::string httpAddr; i2p::config::GetOption("http.address", httpAddr);
 				uint16_t    httpPort; i2p::config::GetOption("http.port", httpPort);
 				LogPrint(eLogInfo, "Daemon: starting webconsole at ", httpAddr, ":", httpPort);
-				try
+				try 
 				{
 					d.httpServer = std::unique_ptr<i2p::http::HTTPServer>(new i2p::http::HTTPServer(httpAddr, httpPort));
 					d.httpServer->Start();
-				}
-				catch (std::exception& ex)
+				} 
+				catch (std::exception& ex) 
 				{
 					LogPrint (eLogError, "Daemon: failed to start webconsole: ", ex.what ());
 					ThrowFatal ("Unable to start webconsole at ", httpAddr, ":", httpPort, ": ", ex.what ());
 				}
 			}

+
 			LogPrint(eLogInfo, "Daemon: starting Tunnels");
 			i2p::tunnel::tunnels.Start();

@ -352,12 +345,12 @@ namespace i2p
 				std::string i2pcpAddr; i2p::config::GetOption("i2pcontrol.address", i2pcpAddr);
 				uint16_t    i2pcpPort; i2p::config::GetOption("i2pcontrol.port",    i2pcpPort);
 				LogPrint(eLogInfo, "Daemon: starting I2PControl at ", i2pcpAddr, ":", i2pcpPort);
-				try
+				try 
 				{
 					d.m_I2PControlService = std::unique_ptr<i2p::client::I2PControlService>(new i2p::client::I2PControlService (i2pcpAddr, i2pcpPort));
 					d.m_I2PControlService->Start ();
-				}
-				catch (std::exception& ex)
+				} 
+				catch (std::exception& ex) 
 				{
 					LogPrint (eLogError, "Daemon: failed to start I2PControl: ", ex.what ());
 					ThrowFatal ("Unable to start I2PControl service at ", i2pcpAddr, ":", i2pcpPort, ": ", ex.what ());
@ -374,7 +367,7 @@ namespace i2p
 			LogPrint(eLogInfo, "Daemon: stopping Tunnels");
 			i2p::tunnel::tunnels.Stop();

-			if (d.UPnP)
+			if (d.UPnP) 
 			{
 				d.UPnP->Stop ();
 				d.UPnP = nullptr;
--- a/daemon/HTTPServer.cpp
+++ b/daemon/HTTPServer.cpp
@ -12,7 +12,6 @@
 #include <memory>

 #include <boost/asio.hpp>
-#include <boost/bind.hpp>
 #include <boost/algorithm/string.hpp>

 #include "Base.h"
@ -733,13 +732,6 @@ namespace http {
 	void ShowTransports (std::stringstream& s)
 	{
 		s << "<b>Transports:</b><br>\r\n";
-		auto ntcpServer = i2p::transport::transports.GetNTCPServer ();
-		if (ntcpServer)
-		{
-			auto sessions = ntcpServer->GetNTCPSessions ();
-			if (!sessions.empty ())
-				ShowNTCPTransports (s, sessions, "NTCP");
-		}
 		auto ntcp2Server = i2p::transport::transports.GetNTCP2Server ();
 		if (ntcp2Server)
 		{
@ -1321,8 +1313,8 @@ namespace http {
 	void HTTPServer::Accept ()
 	{
 		auto newSocket = std::make_shared<boost::asio::ip::tcp::socket> (m_Service);
-		m_Acceptor.async_accept (*newSocket, boost::bind (&HTTPServer::HandleAccept, this,
-			boost::asio::placeholders::error, newSocket));
+		m_Acceptor.async_accept (*newSocket, std::bind (&HTTPServer::HandleAccept, this,
+			std::placeholders::_1, newSocket));
 	}

 	void HTTPServer::HandleAccept(const boost::system::error_code& ecode,
--- a/daemon/I2PControl.cpp
+++ b/daemon/I2PControl.cpp
@ -1,11 +1,3 @@
-/*
-* Copyright (c) 2013-2020, The PurpleI2P Project
-*
-* This file is part of Purple i2pd project and licensed under BSD3
-*
-* See full license text in LICENSE file at top of project tree
-*/
-
 #include <stdio.h>
 #include <sstream>
 #include <openssl/x509.h>
@ -14,12 +6,7 @@
 #include <boost/date_time/local_time/local_time.hpp>
 #include <boost/date_time/posix_time/posix_time.hpp>
 #include <boost/property_tree/ini_parser.hpp>
-
-// There is bug in boost 1.49 with gcc 4.7 coming with Debian Wheezy
-#define GCC47_BOOST149 ((BOOST_VERSION == 104900) && (__GNUC__ == 4) && (__GNUC_MINOR__ >= 7))
-#if !GCC47_BOOST149
 #include <boost/property_tree/json_parser.hpp>
-#endif

 #include "Crypto.h"
 #include "FS.h"
@ -67,28 +54,29 @@ namespace client
 		m_SSLContext.use_private_key_file (i2pcp_key, boost::asio::ssl::context::pem);

 		// handlers
-		m_MethodHandlers["Authenticate"]       = &I2PControlService::AuthenticateHandler;
-		m_MethodHandlers["Echo"]               = &I2PControlService::EchoHandler;
-		m_MethodHandlers["I2PControl"]         = &I2PControlService::I2PControlHandler;
-		m_MethodHandlers["RouterInfo"]         = &I2PControlService::RouterInfoHandler;
-		m_MethodHandlers["RouterManager"]      = &I2PControlService::RouterManagerHandler;
-		m_MethodHandlers["NetworkSetting"]     = &I2PControlService::NetworkSettingHandler;
-		m_MethodHandlers["ClientServicesInfo"] = &I2PControlService::ClientServicesInfoHandler;
+		m_MethodHandlers["Authenticate"]   = &I2PControlService::AuthenticateHandler;
+		m_MethodHandlers["Echo"]           = &I2PControlService::EchoHandler;
+		m_MethodHandlers["I2PControl"]     = &I2PControlService::I2PControlHandler;
+		m_MethodHandlers["RouterInfo"]     = &I2PControlService::RouterInfoHandler;
+		m_MethodHandlers["RouterManager"]  = &I2PControlService::RouterManagerHandler;
+		m_MethodHandlers["NetworkSetting"] = &I2PControlService::NetworkSettingHandler;
+		m_MethodHandlers["ClientServicesInfo"]     = &I2PControlService::ClientServicesInfoHandler;

 		// I2PControl
 		m_I2PControlHandlers["i2pcontrol.password"] = &I2PControlService::PasswordHandler;

 		// RouterInfo
-		m_RouterInfoHandlers["i2p.router.uptime"]                    = &I2PControlService::UptimeHandler;
-		m_RouterInfoHandlers["i2p.router.version"]                   = &I2PControlService::VersionHandler;
-		m_RouterInfoHandlers["i2p.router.status"]                    = &I2PControlService::StatusHandler;
-		m_RouterInfoHandlers["i2p.router.netdb.knownpeers"]          = &I2PControlService::NetDbKnownPeersHandler;
-		m_RouterInfoHandlers["i2p.router.netdb.activepeers"]         = &I2PControlService::NetDbActivePeersHandler;
-		m_RouterInfoHandlers["i2p.router.net.bw.inbound.1s"]         = &I2PControlService::InboundBandwidth1S;
-		m_RouterInfoHandlers["i2p.router.net.bw.outbound.1s"]        = &I2PControlService::OutboundBandwidth1S;
-		m_RouterInfoHandlers["i2p.router.net.status"]                = &I2PControlService::NetStatusHandler;
+		m_RouterInfoHandlers["i2p.router.uptime"]  = &I2PControlService::UptimeHandler;
+		m_RouterInfoHandlers["i2p.router.version"] = &I2PControlService::VersionHandler;
+		m_RouterInfoHandlers["i2p.router.status"]  = &I2PControlService::StatusHandler;
+		m_RouterInfoHandlers["i2p.router.netdb.knownpeers"]   = &I2PControlService::NetDbKnownPeersHandler;
+		m_RouterInfoHandlers["i2p.router.netdb.activepeers"]  = &I2PControlService::NetDbActivePeersHandler;
+		m_RouterInfoHandlers["i2p.router.net.bw.inbound.1s"]  = &I2PControlService::InboundBandwidth1S;
+		m_RouterInfoHandlers["i2p.router.net.bw.outbound.1s"] = &I2PControlService::OutboundBandwidth1S;
+		m_RouterInfoHandlers["i2p.router.net.status"]         = &I2PControlService::NetStatusHandler;
 		m_RouterInfoHandlers["i2p.router.net.tunnels.participating"] = &I2PControlService::TunnelsParticipatingHandler;
-		m_RouterInfoHandlers["i2p.router.net.tunnels.successrate"]   = &I2PControlService::TunnelsSuccessRateHandler;
+		m_RouterInfoHandlers["i2p.router.net.tunnels.successrate"] =
+&I2PControlService::TunnelsSuccessRateHandler;
 		m_RouterInfoHandlers["i2p.router.net.total.received.bytes"]  = &I2PControlService::NetTotalReceivedBytes;
 		m_RouterInfoHandlers["i2p.router.net.total.sent.bytes"]      = &I2PControlService::NetTotalSentBytes;

@ -104,10 +92,10 @@ namespace client
 		// ClientServicesInfo
 		m_ClientServicesInfoHandlers["I2PTunnel"] = &I2PControlService::I2PTunnelInfoHandler;
 		m_ClientServicesInfoHandlers["HTTPProxy"] = &I2PControlService::HTTPProxyInfoHandler;
-		m_ClientServicesInfoHandlers["SOCKS"]     = &I2PControlService::SOCKSInfoHandler;
-		m_ClientServicesInfoHandlers["SAM"]       = &I2PControlService::SAMInfoHandler;
-		m_ClientServicesInfoHandlers["BOB"]       = &I2PControlService::BOBInfoHandler;
-		m_ClientServicesInfoHandlers["I2CP"]      = &I2PControlService::I2CPInfoHandler;
+		m_ClientServicesInfoHandlers["SOCKS"] = &I2PControlService::SOCKSInfoHandler;
+		m_ClientServicesInfoHandlers["SAM"] = &I2PControlService::SAMInfoHandler;
+		m_ClientServicesInfoHandlers["BOB"] = &I2PControlService::BOBInfoHandler;
+		m_ClientServicesInfoHandlers["I2CP"] = &I2PControlService::I2CPInfoHandler;
 	}

 	I2PControlService::~I2PControlService ()
@ -242,12 +230,6 @@ namespace client
 					}
 				}
 				std::ostringstream response;
-#if GCC47_BOOST149
-				LogPrint (eLogError, "I2PControl: json_read is not supported due bug in boost 1.49 with gcc 4.7");
-				response << "{\"id\":null,\"error\":";
-				response << "{\"code\":-32603,\"message\":\"JSON requests is not supported with this version of boost\"},";
-				response << "\"jsonrpc\":\"2.0\"}";
-#else
 				boost::property_tree::ptree pt;
 				boost::property_tree::read_json (ss, pt);

@ -267,7 +249,6 @@ namespace client
 					response << "{\"code\":-32601,\"message\":\"Method not found\"},";
 					response << "\"jsonrpc\":\"2.0\"}";
 				}
-#endif
 				SendResponse (socket, buf, response, isHtml);
 			}
 			catch (std::exception& ex)
@ -408,8 +389,8 @@ namespace client
 			auto it1 = m_RouterInfoHandlers.find (it->first);
 			if (it1 != m_RouterInfoHandlers.end ())
 			{
-				if (!first) results << ",";
-				else first = false;
+				if (!first) results << ","; 
+				else first = false;		
 				(this->*(it1->second))(results);
 			}
 			else
@ -507,7 +488,7 @@ namespace client
 		m_ShutdownTimer.expires_from_now (boost::posix_time::seconds(1)); // 1 second to make sure response has been sent
 		m_ShutdownTimer.async_wait (
 			[](const boost::system::error_code& ecode)
-			{
+		    {
 				Daemon.running = 0;
 			});
 	}
@ -521,7 +502,7 @@ namespace client
 		m_ShutdownTimer.expires_from_now (boost::posix_time::seconds(timeout + 1)); // + 1 second
 		m_ShutdownTimer.async_wait (
 			[](const boost::system::error_code& ecode)
-			{
+		    {
 				Daemon.running = 0;
 			});
 	}
--- a/daemon/UPnP.cpp
+++ b/daemon/UPnP.cpp
@ -1,18 +1,9 @@
-/*
-* Copyright (c) 2013-2020, The PurpleI2P Project
-*
-* This file is part of Purple i2pd project and licensed under BSD3
-*
-* See full license text in LICENSE file at top of project tree
-*/
-
 #ifdef USE_UPNP
 #include <string>
 #include <thread>

 #include <boost/thread/thread.hpp>
 #include <boost/asio.hpp>
-#include <boost/bind.hpp>

 #include "Log.h"

@ -88,10 +79,10 @@ namespace transport
 	void UPnP::Discover ()
 	{
 		bool isError;
-		int err;
+        int err;

 #if ((MINIUPNPC_API_VERSION >= 8) || defined (UPNPDISCOVER_SUCCESS))
-		err = UPNPDISCOVER_SUCCESS;
+        err = UPNPDISCOVER_SUCCESS;

 #if (MINIUPNPC_API_VERSION >= 14)
 		m_Devlist = upnpDiscover (UPNP_RESPONSE_TIMEOUT, NULL, NULL, 0, 0, 2, &err);
@ -100,9 +91,9 @@ namespace transport
 #endif

 		isError = err != UPNPDISCOVER_SUCCESS;
-#else // MINIUPNPC_API_VERSION >= 8
-		err = 0;
-		m_Devlist = upnpDiscover (UPNP_RESPONSE_TIMEOUT, NULL, NULL, 0);
+#else  // MINIUPNPC_API_VERSION >= 8
+        err = 0;
+        m_Devlist = upnpDiscover (UPNP_RESPONSE_TIMEOUT, NULL, NULL, 0);
 		isError = m_Devlist == NULL;
 #endif // MINIUPNPC_API_VERSION >= 8
 		{
@ -113,15 +104,15 @@ namespace transport

 		if (isError)
 		{
-			LogPrint (eLogError, "UPnP: unable to discover Internet Gateway Devices: error ", err);
+            LogPrint (eLogError, "UPnP: unable to discover Internet Gateway Devices: error ", err);
 			return;
 		}

 		err = UPNP_GetValidIGD (m_Devlist, &m_upnpUrls, &m_upnpData, m_NetworkAddr, sizeof (m_NetworkAddr));
-		m_upnpUrlsInitialized = err != 0;
+        m_upnpUrlsInitialized=err!=0;
 		if (err == UPNP_IGD_VALID_CONNECTED)
 		{
-			err = UPNP_GetExternalIPAddress (m_upnpUrls.controlURL, m_upnpData.first.servicetype, m_externalIPAddress);
+            err = UPNP_GetExternalIPAddress (m_upnpUrls.controlURL, m_upnpData.first.servicetype, m_externalIPAddress);
 			if(err != UPNPCOMMAND_SUCCESS)
 			{
 				LogPrint (eLogError, "UPnP: unable to get external address: error ", err);
@ -132,14 +123,14 @@ namespace transport
 				LogPrint (eLogError, "UPnP: found Internet Gateway Device ", m_upnpUrls.controlURL);
 				if (!m_externalIPAddress[0])
 				{
-					LogPrint (eLogError, "UPnP: found Internet Gateway Device doesn't know our external address");
+                    LogPrint (eLogError, "UPnP: found Internet Gateway Device doesn't know our external address");
 					return;
 				}
 			}
 		}
 		else
 		{
-			LogPrint (eLogError, "UPnP: unable to find valid Internet Gateway Device: error ", err);
+            LogPrint (eLogError, "UPnP: unable to find valid Internet Gateway Device: error ", err);
 			return;
 		}

@ -190,7 +181,7 @@ namespace transport
 		err = CheckMapping (strPort.c_str (), strType.c_str ());
 		if (err != UPNPCOMMAND_SUCCESS) // if mapping not found
 		{
-			LogPrint (eLogDebug, "UPnP: possibly port ", strPort, " is not forwarded: return code ", err);
+            LogPrint (eLogDebug, "UPnP: possibly port ", strPort, " is not forwarded: return code ", err);

 #if ((MINIUPNPC_API_VERSION >= 8) || defined (UPNPDISCOVER_SUCCESS))
 			err = UPNP_AddPortMapping (m_upnpUrls.controlURL, m_upnpData.first.servicetype, strPort.c_str (), strPort.c_str (), m_NetworkAddr, strDesc.c_str (), strType.c_str (), NULL, NULL);
@ -210,7 +201,7 @@ namespace transport
 		}
 		else
 		{
-			LogPrint (eLogDebug, "UPnP: external forward from ", m_NetworkAddr, ":", strPort, " exists on current Internet Gateway Device");
+            LogPrint (eLogDebug, "UPnP: external forward from ", m_NetworkAddr, ":", strPort, " exists on current Internet Gateway Device");
 			return;
 		}
 	}
@ -227,14 +218,14 @@ namespace transport

 	void UPnP::CloseMapping (std::shared_ptr<i2p::data::RouterInfo::Address> address)
 	{
-		if(!m_upnpUrlsInitialized) {
-			return;
-		}
+        if(!m_upnpUrlsInitialized) {
+            return;
+        }
 		std::string strType (GetProto (address)), strPort (std::to_string (address->port));
 		int err = UPNPCOMMAND_SUCCESS;
-
+		
 		err = CheckMapping (strPort.c_str (), strType.c_str ());
-		if (err == UPNPCOMMAND_SUCCESS)
+        if (err == UPNPCOMMAND_SUCCESS)
 		{
 			err = UPNP_DeletePortMapping (m_upnpUrls.controlURL, m_upnpData.first.servicetype, strPort.c_str (), strType.c_str (), NULL);
 			LogPrint (eLogError, "UPnP: DeletePortMapping() returned : ", err);
@ -245,11 +236,11 @@ namespace transport
 	{
 		freeUPNPDevlist (m_Devlist);
 		m_Devlist = 0;
-		if(m_upnpUrlsInitialized){
-			FreeUPNPUrls (&m_upnpUrls);
-			m_upnpUrlsInitialized=false;
-		}
-	}
+        if(m_upnpUrlsInitialized){
+            FreeUPNPUrls (&m_upnpUrls);
+            m_upnpUrlsInitialized=false;
+        }
+    }

 	std::string UPnP::GetProto (std::shared_ptr<i2p::data::RouterInfo::Address> address)
 	{
--- a/libi2pd/Config.cpp
+++ b/libi2pd/Config.cpp
@ -58,9 +58,9 @@ namespace config {
 			("floodfill", bool_switch()->default_value(false),                "Router will be floodfill (default: disabled)")
 			("bandwidth", value<std::string>()->default_value(""),            "Bandwidth limit: integer in KBps or letters: L (32), O (256), P (2048), X (>9000)")
 			("share", value<int>()->default_value(100),                       "Limit of transit traffic from max bandwidth in percents. (default: 100)")
-			("ntcp", value<bool>()->default_value(false),                     "Enable NTCP transport (default: disabled)")
+			("ntcp", value<bool>()->default_value(false),                     "Ignored. Always false")
 			("ssu", value<bool>()->default_value(true),                       "Enable SSU transport (default: enabled)")
-			("ntcpproxy", value<std::string>()->default_value(""),            "Proxy URL for NTCP transport")
+			("ntcpproxy", value<std::string>()->default_value(""),            "Ignored")
 #ifdef _WIN32
 			("svcctl", value<std::string>()->default_value(""),               "Windows service management ('install' or 'remove')")
 			("insomnia", bool_switch()->default_value(false),                 "Prevent system from sleeping (default: disabled)")
@ -96,7 +96,7 @@ namespace config {
 			("httpproxy.enabled", value<bool>()->default_value(true),                 "Enable or disable HTTP Proxy")
 			("httpproxy.address", value<std::string>()->default_value("127.0.0.1"),   "HTTP Proxy listen address")
 			("httpproxy.port", value<uint16_t>()->default_value(4444),                "HTTP Proxy listen port")
-			("httpproxy.keys", value<std::string>()->default_value(""),               "File to persist HTTP Proxy keys")
+			("httpproxy.keys", value<std::string>()->default_value("transient-proxy"), "File to persist HTTP Proxy keys. Transient by default")
 			("httpproxy.signaturetype", value<i2p::data::SigningKeyType>()->
 				default_value(i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519),      "Signature type for new keys. 7 (EdDSA) by default")
 			("httpproxy.inbound.length", value<std::string>()->default_value("3"),    "HTTP proxy inbound tunnel length")
@ -116,7 +116,7 @@ namespace config {
 			("socksproxy.enabled", value<bool>()->default_value(true),                 "Enable or disable SOCKS Proxy")
 			("socksproxy.address", value<std::string>()->default_value("127.0.0.1"),   "SOCKS Proxy listen address")
 			("socksproxy.port", value<uint16_t>()->default_value(4447),                "SOCKS Proxy listen port")
-			("socksproxy.keys", value<std::string>()->default_value(""),               "File to persist SOCKS Proxy keys")
+			("socksproxy.keys", value<std::string>()->default_value("transient-proxy"), "File to persist SOCKS Proxy keys. Transient by default")
 			("socksproxy.signaturetype", value<i2p::data::SigningKeyType>()->
 				default_value(i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519),       "Signature type for new keys. 7 (EdDSA) by default")
 			("socksproxy.inbound.length", value<std::string>()->default_value("3"),    "SOCKS proxy inbound tunnel length")
@ -152,6 +152,7 @@ namespace config {
 			("i2cp.enabled", value<bool>()->default_value(false),              "Enable or disable I2CP")
 			("i2cp.address", value<std::string>()->default_value("127.0.0.1"), "I2CP listen address")
 			("i2cp.port", value<uint16_t>()->default_value(7654),              "I2CP listen port")
+			("i2cp.singlethread", value<bool>()->default_value(true),          "Destinations run in the I2CP server's thread")
 		;

 		options_description i2pcontrol("I2PControl options");
--- a/libi2pd/Destination.cpp
+++ b/libi2pd/Destination.cpp
@ -13,6 +13,7 @@
 #include <vector>
 #include <boost/algorithm/string.hpp>
 #include "Crypto.h"
+#include "Config.h"
 #include "Log.h"
 #include "FS.h"
 #include "Timestamp.h"
@ -464,14 +465,14 @@ namespace client
 			if (request->excluded.size () < MAX_NUM_FLOODFILLS_PER_REQUEST)
 			{
 				for (int i = 0; i < num; i++)
-			{
-				i2p::data::IdentHash peerHash (buf + 33 + i*32);
-				if (!request->excluded.count (peerHash) && !i2p::data::netdb.FindRouter (peerHash))
 				{
-					LogPrint (eLogInfo, "Destination: Found new floodfill, request it"); // TODO: recheck this message
-					i2p::data::netdb.RequestDestination (peerHash);
+					i2p::data::IdentHash peerHash (buf + 33 + i*32);
+					if (!request->excluded.count (peerHash) && !i2p::data::netdb.FindRouter (peerHash))
+					{
+						LogPrint (eLogInfo, "Destination: Found new floodfill, request it"); 
+						i2p::data::netdb.RequestDestination (peerHash, nullptr, false); // through exploratory
+					}
 				}
-			}

 				auto floodfill = i2p::data::netdb.GetClosestFloodfill (key, request->excluded);
 				if (floodfill)
@ -603,9 +604,8 @@ namespace client
 				return;
 			}
 			auto s = shared_from_this ();
-			// we must capture this for gcc 4.7 due the bug
 			RequestLeaseSet (ls->GetStoreHash (),
-				[s, ls, this](std::shared_ptr<const i2p::data::LeaseSet> leaseSet)
+				[s, ls](std::shared_ptr<const i2p::data::LeaseSet> leaseSet)
 				{
 					if (leaseSet)
 					{
@ -744,14 +744,19 @@ namespace client
 			request->excluded.insert (nextFloodfill->GetIdentHash ());
 			request->requestTimeoutTimer.cancel ();

+			bool isECIES = SupportsEncryptionType (i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET) &&
+				nextFloodfill->GetVersion () >= MAKE_VERSION_NUMBER(0, 9, 46); // >= 0.9.46;
 			uint8_t replyKey[32], replyTag[32];
 			RAND_bytes (replyKey, 32); // random session key
-			RAND_bytes (replyTag, 32); // random session tag
-			AddSessionKey (replyKey, replyTag);
+			RAND_bytes (replyTag, isECIES ? 8 : 32); // random session tag
+			if (isECIES)	
+				AddECIESx25519Key (replyKey, replyTag);
+			else	
+				AddSessionKey (replyKey, replyTag);

 			auto msg = WrapMessage (nextFloodfill,
 				CreateLeaseSetDatabaseLookupMsg (dest, request->excluded,
-					request->replyTunnel, replyKey, replyTag));
+					request->replyTunnel, replyKey, replyTag, isECIES));
 			request->outboundTunnel->SendTunnelDataMsg (
 				{
 					i2p::tunnel::TunnelMessageBlock
@ -845,8 +850,9 @@ namespace client

 	ClientDestination::ClientDestination (boost::asio::io_service& service, const i2p::data::PrivateKeys& keys,
 		bool isPublic, const std::map<std::string, std::string> * params):
-		LeaseSetDestination (service, isPublic, params),
-		m_Keys (keys), m_StreamingAckDelay (DEFAULT_INITIAL_ACK_DELAY),
+		LeaseSetDestination (service, isPublic, params), 
+		m_Keys (keys), m_StreamingAckDelay (DEFAULT_INITIAL_ACK_DELAY), 
+		m_IsStreamingAnswerPings (DEFAULT_ANSWER_PINGS),
 		m_DatagramDestination (nullptr), m_RefCounter (0),
 		m_ReadyChecker(service)
 	{
@ -855,8 +861,7 @@ namespace client

 		// extract encryption type params for LS2
 		std::set<i2p::data::CryptoKeyType> encryptionKeyTypes;
-		if ((GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2 ||
-			GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2) && params)
+		if (params)
 		{
 			auto it = params->find (I2CP_PARAM_LEASESET_ENCRYPTION_TYPE);
 			if (it != params->end ())
@ -915,7 +920,10 @@ namespace client
 				auto it = params->find (I2CP_PARAM_STREAMING_INITIAL_ACK_DELAY);
 				if (it != params->end ())
 					m_StreamingAckDelay = std::stoi(it->second);
-
+				it = params->find (I2CP_PARAM_STREAMING_ANSWER_PINGS);
+				if (it != params->end ())
+					i2p::config::GetOption (it->second, m_IsStreamingAnswerPings);
+				
 				if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2)
 				{
 					// authentication for encrypted LeaseSet
--- a/libi2pd/Destination.h
+++ b/libi2pd/Destination.h
@ -78,6 +78,8 @@ namespace client
 	// streaming
 	const char I2CP_PARAM_STREAMING_INITIAL_ACK_DELAY[] = "i2p.streaming.initialAckDelay";
 	const int DEFAULT_INITIAL_ACK_DELAY = 200; // milliseconds
+	const char I2CP_PARAM_STREAMING_ANSWER_PINGS[] = "i2p.streaming.answerPings";
+	const int DEFAULT_ANSWER_PINGS = true; 

 	typedef std::function<void (std::shared_ptr<i2p::stream::Stream> stream)> StreamRequestComplete;

@ -242,7 +244,8 @@ namespace client
 			bool IsAcceptingStreams () const;
 			void AcceptOnce (const i2p::stream::StreamingDestination::Acceptor& acceptor);
 			int GetStreamingAckDelay () const { return m_StreamingAckDelay; }
-
+			bool IsStreamingAnswerPings () const { return m_IsStreamingAnswerPings; }
+			
 			// datagram
 			i2p::datagram::DatagramDestination * GetDatagramDestination () const { return m_DatagramDestination; };
 			i2p::datagram::DatagramDestination * CreateDatagramDestination (bool gzip = true);
@ -275,6 +278,7 @@ namespace client
 			std::unique_ptr<EncryptionKey> m_ECIESx25519EncryptionKey;

 			int m_StreamingAckDelay;
+			bool m_IsStreamingAnswerPings;
 			std::shared_ptr<i2p::stream::StreamingDestination> m_StreamingDestination; // default
 			std::map<uint16_t, std::shared_ptr<i2p::stream::StreamingDestination> > m_StreamingDestinationsByPorts;
 			i2p::datagram::DatagramDestination * m_DatagramDestination;
--- a/libi2pd/ECIESX25519AEADRatchetSession.cpp
+++ b/libi2pd/ECIESX25519AEADRatchetSession.cpp
@ -88,12 +88,67 @@ namespace garlic
 		}
 	}

+	void RatchetTagSet::DeleteSymmKey (int index)
+	{	
+		m_ItermediateSymmKeys.erase (index);
+	}
+	
 	void RatchetTagSet::Expire ()
 	{
 		if (!m_ExpirationTimestamp)
 			m_ExpirationTimestamp = i2p::util::GetSecondsSinceEpoch () + ECIESX25519_PREVIOUS_TAGSET_EXPIRATION_TIMEOUT;
 	}

+	bool RatchetTagSet::HandleNextMessage (uint8_t * buf, size_t len, int index)
+	{
+		auto session = GetSession ();
+		if (!session) return false;
+		return session->HandleNextMessage (buf, len, shared_from_this (), index);
+	}	
+
+	DatabaseLookupTagSet::DatabaseLookupTagSet (GarlicDestination * destination, const uint8_t * key):
+		RatchetTagSet (nullptr), m_Destination (destination) 
+	{ 
+		memcpy (m_Key, key, 32); 
+		Expire ();	
+	}
+	
+	bool DatabaseLookupTagSet::HandleNextMessage (uint8_t * buf, size_t len, int index)
+	{
+		if (len < 24) return false;
+		uint8_t nonce[12];
+		memset (nonce, 0, 12); // n = 0
+		size_t offset = 8; // first 8 bytes is reply tag used as AD	
+		len -= 16; // poly1305
+		if (!i2p::crypto::AEADChaCha20Poly1305 (buf + offset, len - offset, buf, 8, m_Key, nonce, buf + offset, len - offset, false)) // decrypt
+		{
+			LogPrint (eLogWarning, "Garlic: Lookup reply AEAD decryption failed");
+			return false;
+		}
+		// we assume 1 I2NP block with delivery type local
+		if (offset + 3 > len) 
+		{	
+			LogPrint (eLogWarning, "Garlic: Lookup reply is too short ", len);
+			return false;
+		}	
+		if (buf[offset] != eECIESx25519BlkGalicClove)
+		{
+			LogPrint (eLogWarning, "Garlic: Lookup reply unexpected block ", (int)buf[offset]);
+			return false;
+		}	
+		offset++;
+		auto size = bufbe16toh (buf + offset);
+		offset += 2;
+		if (offset + size > len) 
+		{
+			LogPrint (eLogWarning, "Garlic: Lookup reply block is too long ", size);
+			return false;
+		}	
+		if (m_Destination)
+			m_Destination->HandleECIESx25519GarlicClove (buf + offset, size);	
+		return true;
+	}	
+	
 	ECIESX25519AEADRatchetSession::ECIESX25519AEADRatchetSession (GarlicDestination * owner, bool attachLeaseSet):
 		GarlicRoutingSession (owner, attachLeaseSet)
 	{
@ -657,7 +712,12 @@ namespace garlic
 				moreTags -= (receiveTagset->GetNextIndex () - index);
 			}	
 			if (moreTags > 0)
+			{	
 				GenerateMoreReceiveTags (receiveTagset, moreTags);
+				index -= (moreTags >> 1); // /2
+				if (index > 0)
+					receiveTagset->SetTrimBehind (index);
+			}	
 		}	
 		return true;
 	}
--- a/libi2pd/ECIESX25519AEADRatchetSession.h
+++ b/libi2pd/ECIESX25519AEADRatchetSession.h
@ -40,7 +40,7 @@ namespace garlic
 	// - 16 /* I2NP header */ - 16 /* poly hash */ - 8 /* tag */ - 4 /* garlic length */

 	class ECIESX25519AEADRatchetSession;
-	class RatchetTagSet
+	class RatchetTagSet: public std::enable_shared_from_this<RatchetTagSet>
 	{
 		public:

@ -52,14 +52,19 @@ namespace garlic
 			const uint8_t * GetNextRootKey () const { return m_NextRootKey; };
 			int GetNextIndex () const { return m_NextIndex; };
 			void GetSymmKey (int index, uint8_t * key);
+			void DeleteSymmKey (int index);

 			std::shared_ptr<ECIESX25519AEADRatchetSession> GetSession () { return m_Session.lock (); };
 			int GetTagSetID () const { return m_TagSetID; };
 			void SetTagSetID (int tagsetID) { m_TagSetID = tagsetID; };
+			void SetTrimBehind (int index) { if (index > m_TrimBehindIndex) m_TrimBehindIndex = index; }; 

 			void Expire ();
 			bool IsExpired (uint64_t ts) const { return m_ExpirationTimestamp && ts > m_ExpirationTimestamp; };
+			virtual bool IsIndexExpired (int index) const { return m_Session.expired () || index < m_TrimBehindIndex; };

+			virtual bool HandleNextMessage (uint8_t * buf, size_t len, int index);
+			
 		private:

 			union
@ -73,7 +78,7 @@ namespace garlic

 			} m_KeyData;
 			uint8_t m_SessTagConstant[32], m_SymmKeyCK[32], m_CurrentSymmKeyCK[64], m_NextRootKey[32];
-			int m_NextIndex, m_NextSymmKeyIndex;
+			int m_NextIndex, m_NextSymmKeyIndex, m_TrimBehindIndex = 0;
 			std::unordered_map<int, i2p::data::Tag<32> > m_ItermediateSymmKeys;
 			std::weak_ptr<ECIESX25519AEADRatchetSession> m_Session;
 			int m_TagSetID = 0;
@ -91,6 +96,21 @@ namespace garlic

 			std::shared_ptr<ECIESX25519AEADRatchetSession> m_DummySession; // we need a strong pointer for NS
 	};	
+
+	class DatabaseLookupTagSet: public RatchetTagSet
+	{
+		public:
+
+			DatabaseLookupTagSet (GarlicDestination * destination, const uint8_t * key);
+
+			bool IsIndexExpired (int index) const { return false; };
+			bool HandleNextMessage (uint8_t * buf, size_t len, int index);
+			
+		private:
+
+			GarlicDestination * m_Destination;
+			uint8_t m_Key[32];
+	};	
 	
 	enum ECIESx25519BlockType
 	{
--- a/libi2pd/Garlic.cpp
+++ b/libi2pd/Garlic.cpp
@ -460,6 +460,14 @@ namespace garlic
 		}
 	}

+	void GarlicDestination::AddECIESx25519Key (const uint8_t * key, const uint8_t * tag)
+	{
+		uint64_t t;
+		memcpy (&t, tag, 8);
+		auto tagset = std::make_shared<DatabaseLookupTagSet>(this, key);
+		m_ECIESx25519Tags.emplace (t, ECIESX25519AEADRatchetIndexTagset{0, tagset});
+	}	
+		
 	bool GarlicDestination::SubmitSessionKey (const uint8_t * key, const uint8_t * tag)
 	{
 		AddSessionKey (key, tag);
@ -507,8 +515,7 @@ namespace garlic
 				if (it1 != m_ECIESx25519Tags.end ())
 				{
 					found = true;
-					auto session = it1->second.tagset->GetSession ();
-					if (!session || !session->HandleNextMessage (buf, length, it1->second.tagset, it1->second.index))
+					if (!it1->second.tagset->HandleNextMessage (buf, length, it1->second.index))
 						LogPrint (eLogError, "Garlic: can't handle ECIES-X25519-AEAD-Ratchet message");
 					m_ECIESx25519Tags.erase (it1);
 				}
@ -802,14 +809,6 @@ namespace garlic
 			}
 		}
 		// ECIESx25519
-		for (auto it = m_ECIESx25519Tags.begin (); it != m_ECIESx25519Tags.end ();)
-		{
-			if (it->second.tagset->IsExpired (ts) || ts > it->second.creationTime + ECIESX25519_INCOMING_TAGS_EXPIRATION_TIMEOUT)
-				it = m_ECIESx25519Tags.erase (it);
-			else
-				++it;
-		}
-
 		for (auto it = m_ECIESx25519Sessions.begin (); it != m_ECIESx25519Sessions.end ();)
 		{
 			if (it->second->CheckExpired (ts))
@ -820,6 +819,20 @@ namespace garlic
 			else
 				++it;
 		}
+
+		numExpiredTags = 0;
+		for (auto it = m_ECIESx25519Tags.begin (); it != m_ECIESx25519Tags.end ();)
+		{
+			if (it->second.tagset->IsExpired (ts) || it->second.tagset->IsIndexExpired (it->second.index))
+			{
+				it->second.tagset->DeleteSymmKey (it->second.index);
+				it = m_ECIESx25519Tags.erase (it);
+			}	
+			else
+				++it;
+		}
+		if (numExpiredTags > 0)
+			LogPrint (eLogDebug, "Garlic: ", numExpiredTags, " ECIESx25519 tags expired for ", GetIdentHash().ToBase64 ());
 	}

 	void GarlicDestination::RemoveDeliveryStatusSession (uint32_t msgID)
@ -1009,7 +1022,7 @@ namespace garlic
 	{
 		auto index = tagset->GetNextIndex ();
 		uint64_t tag = tagset->GetNextSessionTag ();
-		m_ECIESx25519Tags.emplace (tag, ECIESX25519AEADRatchetIndexTagset{index, tagset, i2p::util::GetSecondsSinceEpoch ()});
+		m_ECIESx25519Tags.emplace (tag, ECIESX25519AEADRatchetIndexTagset{index, tagset});
 	}

 	void GarlicDestination::AddECIESx25519Session (const uint8_t * staticKey, ECIESX25519AEADRatchetSessionPtr session)
--- a/libi2pd/Garlic.h
+++ b/libi2pd/Garlic.h
@ -220,7 +220,6 @@ namespace garlic
 	{
 		int index;
 		RatchetTagSetPtr tagset;
-		uint64_t creationTime; // seconds since epoch
 	};

 	class GarlicDestination: public i2p::data::LocalDestination
@ -242,6 +241,7 @@ namespace garlic
 				std::shared_ptr<I2NPMessage> msg, bool attachLeaseSet = false);

 			void AddSessionKey (const uint8_t * key, const uint8_t * tag); // one tag
+			void AddECIESx25519Key (const uint8_t * key, const uint8_t * tag); // one tag
 			virtual bool SubmitSessionKey (const uint8_t * key, const uint8_t * tag); // from different thread
 			void DeliveryStatusSent (GarlicRoutingSessionPtr session, uint32_t msgID);
 			void AddECIESx25519SessionNextTag (RatchetTagSetPtr tagset);
--- a/libi2pd/I2NPProtocol.cpp
+++ b/libi2pd/I2NPProtocol.cpp
@ -171,7 +171,8 @@ namespace i2p

 	std::shared_ptr<I2NPMessage> CreateLeaseSetDatabaseLookupMsg (const i2p::data::IdentHash& dest,
 		const std::set<i2p::data::IdentHash>& excludedFloodfills,
-		std::shared_ptr<const i2p::tunnel::InboundTunnel> replyTunnel, const uint8_t * replyKey, const uint8_t * replyTag)
+		std::shared_ptr<const i2p::tunnel::InboundTunnel> replyTunnel, const uint8_t * replyKey, 
+	    const uint8_t * replyTag, bool replyECIES)
 	{
 		int cnt = excludedFloodfills.size ();
 		auto m = cnt > 7 ? NewI2NPMessage () : NewI2NPShortMessage ();
@ -180,7 +181,8 @@ namespace i2p
 		buf += 32;
 		memcpy (buf, replyTunnel->GetNextIdentHash (), 32); // reply tunnel GW
 		buf += 32;
-		*buf = DATABASE_LOOKUP_DELIVERY_FLAG | DATABASE_LOOKUP_ENCRYPTION_FLAG | DATABASE_LOOKUP_TYPE_LEASESET_LOOKUP; // flags
+		*buf = DATABASE_LOOKUP_DELIVERY_FLAG | DATABASE_LOOKUP_TYPE_LEASESET_LOOKUP; // flags
+		*buf |= (replyECIES ? DATABASE_LOOKUP_ECIES_FLAG : DATABASE_LOOKUP_ENCRYPTION_FLAG);
 		buf ++;
 		htobe32buf (buf, replyTunnel->GetNextTunnelID ()); // reply tunnel ID
 		buf += 4;
@ -204,8 +206,16 @@ namespace i2p
 		// encryption
 		memcpy (buf, replyKey, 32);
 		buf[32] = 1; // 1 tag
-		memcpy (buf + 33, replyTag, 32);
-		buf += 65;
+		if (replyECIES)
+		{
+			memcpy (buf + 33, replyTag, 8); // 8 bytes tag
+			buf += 41;
+		}	
+		else	
+		{		
+			memcpy (buf + 33, replyTag, 32); // 32 bytes tag
+			buf += 65;
+		}	

 		m->len += (buf - m->GetPayload ());
 		m->FillI2NPMessageHeader (eI2NPDatabaseLookup);
--- a/libi2pd/I2NPProtocol.h
+++ b/libi2pd/I2NPProtocol.h
@ -251,8 +251,9 @@ namespace tunnel
 	std::shared_ptr<I2NPMessage> CreateRouterInfoDatabaseLookupMsg (const uint8_t * key, const uint8_t * from,
 		uint32_t replyTunnelID, bool exploratory = false, std::set<i2p::data::IdentHash> * excludedPeers = nullptr);
 	std::shared_ptr<I2NPMessage> CreateLeaseSetDatabaseLookupMsg (const i2p::data::IdentHash& dest,
-		const std::set<i2p::data::IdentHash>& excludedFloodfills,
-		std::shared_ptr<const i2p::tunnel::InboundTunnel> replyTunnel, const uint8_t * replyKey, const uint8_t * replyTag);
+		const std::set<i2p::data::IdentHash>& excludedFloodfills, 
+	    std::shared_ptr<const i2p::tunnel::InboundTunnel> replyTunnel, 
+	    const uint8_t * replyKey, const uint8_t * replyTag, bool replyECIES = false);
 	std::shared_ptr<I2NPMessage> CreateDatabaseSearchReply (const i2p::data::IdentHash& ident, std::vector<i2p::data::IdentHash> routers);

 	std::shared_ptr<I2NPMessage> CreateDatabaseStoreMsg (std::shared_ptr<const i2p::data::RouterInfo> router = nullptr, uint32_t replyToken = 0);
--- a/libi2pd/NTCP2.cpp
+++ b/libi2pd/NTCP2.cpp
@ -1435,7 +1435,7 @@ namespace transport
 			{

 				auto timer = std::make_shared<boost::asio::deadline_timer>(GetService());
-				auto timeout = NTCP_CONNECT_TIMEOUT * 5;
+				auto timeout = NTCP2_CONNECT_TIMEOUT * 5;
 				conn->SetTerminationTimeout(timeout * 2);
 				timer->expires_from_now (boost::posix_time::seconds(timeout));
 				timer->async_wait ([conn, timeout](const boost::system::error_code& ecode)
--- a/libi2pd/NTCPSession.cpp
+++ b/libi2pd/NTCPSession.cpp
--- a/libi2pd/NTCPSession.h
+++ b/libi2pd/NTCPSession.h
@ -1,242 +0,0 @@
-/*
-* Copyright (c) 2013-2020, The PurpleI2P Project
-*
-* This file is part of Purple i2pd project and licensed under BSD3
-*
-* See full license text in LICENSE file at top of project tree
-*/
-
-#ifndef NTCP_SESSION_H__
-#define NTCP_SESSION_H__
-
-#include <inttypes.h>
-#include <map>
-#include <memory>
-#include <thread>
-#include <mutex>
-#include <boost/asio.hpp>
-#include "Crypto.h"
-#include "Identity.h"
-#include "RouterInfo.h"
-#include "I2NPProtocol.h"
-#include "TransportSession.h"
-#include "CryptoWorker.h"
-
-namespace i2p
-{
-namespace transport
-{
-	struct NTCPPhase1
-	{
-		uint8_t pubKey[256];
-		uint8_t HXxorHI[32];
-	};
-
-	struct NTCPPhase2
-	{
-		uint8_t pubKey[256];
-		struct
-		{
-			uint8_t hxy[32];
-			uint8_t timestamp[4];
-			uint8_t filler[12];
-		} encrypted;
-	};
-
-	struct NTCPWork;
-
-	const size_t NTCP_MAX_MESSAGE_SIZE = 16384;
-	const size_t NTCP_BUFFER_SIZE = 1028; // fits 1 tunnel data message
-	const int NTCP_CONNECT_TIMEOUT = 5; // 5 seconds
-	const int NTCP_ESTABLISH_TIMEOUT = 10; // 10 seconds
-	const int NTCP_TERMINATION_TIMEOUT = 120; // 2 minutes
-	const int NTCP_TERMINATION_CHECK_TIMEOUT = 30; // 30 seconds
-	const size_t NTCP_DEFAULT_PHASE3_SIZE = 2/*size*/ + i2p::data::DEFAULT_IDENTITY_SIZE/*387*/ + 4/*ts*/ + 15/*padding*/ + 40/*signature*/; // 448
-	const int NTCP_CLOCK_SKEW = 60; // in seconds
-	const int NTCP_MAX_OUTGOING_QUEUE_SIZE = 200; // how many messages we can queue up
-
-	class NTCPServer;
-	class NTCPSession: public TransportSession, public std::enable_shared_from_this<NTCPSession>
-	{
-		public:
-
-			NTCPSession (NTCPServer& server, std::shared_ptr<const i2p::data::RouterInfo> in_RemoteRouter = nullptr);
-			~NTCPSession ();
-			void Terminate ();
-			void Done ();
-
-			boost::asio::ip::tcp::socket& GetSocket () { return m_Socket; };
-			boost::asio::io_service & GetService();
-			bool IsEstablished () const { return m_IsEstablished; };
-			bool IsTerminated () const { return m_IsTerminated; };
-
-			void ClientLogin ();
-			void ServerLogin ();
-			void SendI2NPMessages (const std::vector<std::shared_ptr<I2NPMessage> >& msgs);
-
-		private:
-
-			void PostI2NPMessages (std::vector<std::shared_ptr<I2NPMessage> > msgs);
-			void Connected ();
-			void SendTimeSyncMessage ();
-			void SetIsEstablished (bool isEstablished) { m_IsEstablished = isEstablished; }
-
-			void CreateAESKey (uint8_t * pubKey);
-
-			// client
-			void SendPhase3 ();
-			void HandlePhase1Sent (const boost::system::error_code& ecode,  std::size_t bytes_transferred);
-			void HandlePhase2Received (const boost::system::error_code& ecode, std::size_t bytes_transferred);
-			void HandlePhase2 (NTCPWork * work=nullptr);
-			void HandlePhase3Sent (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsA);
-			void HandlePhase4Received (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsA);
-
-			//server
-			void SendPhase2 (NTCPWork * work=nullptr);
-			void SendPhase4 (uint32_t tsA, uint32_t tsB);
-			void HandlePhase1Received (const boost::system::error_code& ecode, std::size_t bytes_transferred);
-			void HandlePhase2Sent (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsB);
-			void HandlePhase3Received (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsB);
-			void HandlePhase3ExtraReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsB, size_t paddingLen);
-			void HandlePhase3 (uint32_t tsB, size_t paddingLen);
-			void HandlePhase4Sent (const boost::system::error_code& ecode,  std::size_t bytes_transferred);
-
-			// common
-			void Receive ();
-			void HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred);
-			bool DecryptNextBlock (const uint8_t * encrypted);
-
-			void Send (std::shared_ptr<i2p::I2NPMessage> msg);
-			boost::asio::const_buffers_1 CreateMsgBuffer (std::shared_ptr<I2NPMessage> msg);
-			void Send (const std::vector<std::shared_ptr<I2NPMessage> >& msgs);
-			void HandleSent (const boost::system::error_code& ecode, std::size_t bytes_transferred, std::vector<std::shared_ptr<I2NPMessage> > msgs);
-
-		private:
-
-			NTCPServer& m_Server;
-			boost::asio::ip::tcp::socket m_Socket;
-			bool m_IsEstablished, m_IsTerminated;
-
-			i2p::crypto::CBCDecryption m_Decryption;
-			i2p::crypto::CBCEncryption m_Encryption;
-
-			struct Establisher
-			{
-				NTCPPhase1 phase1;
-				NTCPPhase2 phase2;
-			} * m_Establisher;
-
-			i2p::crypto::AESAlignedBuffer<NTCP_BUFFER_SIZE + 16> m_ReceiveBuffer;
-			i2p::crypto::AESAlignedBuffer<16> m_TimeSyncBuffer;
-			int m_ReceiveBufferOffset;
-
-			std::shared_ptr<I2NPMessage> m_NextMessage;
-			size_t m_NextMessageOffset;
-			i2p::I2NPMessagesHandler m_Handler;
-
-			bool m_IsSending;
-			std::vector<std::shared_ptr<I2NPMessage> > m_SendQueue;
-	};
-
-	// TODO: move to NTCP.h/.cpp
-	class NTCPServer
-	{
-		public:
-
-			typedef i2p::worker::ThreadPool<NTCPSession> Pool;
-
-			enum RemoteAddressType
-			{
-				eIP4Address,
-				eIP6Address,
-				eHostname
-			};
-
-			enum ProxyType
-			{
-				eNoProxy,
-				eSocksProxy,
-				eHTTPProxy
-			};
-
-
-			NTCPServer (int workers=4);
-			~NTCPServer ();
-
-			void Start ();
-			void Stop ();
-
-			bool AddNTCPSession (std::shared_ptr<NTCPSession> session);
-			void RemoveNTCPSession (std::shared_ptr<NTCPSession> session);
-			std::shared_ptr<NTCPSession> FindNTCPSession (const i2p::data::IdentHash& ident);
-			void ConnectWithProxy (const std::string& addr, uint16_t port, RemoteAddressType addrtype, std::shared_ptr<NTCPSession> conn);
-			void Connect(const boost::asio::ip::address & address, uint16_t port, std::shared_ptr<NTCPSession> conn);
-
-			bool IsBoundV4() const { return m_NTCPAcceptor != nullptr; };
-			bool IsBoundV6() const { return m_NTCPV6Acceptor != nullptr; };
-			bool NetworkIsReady() const { return IsBoundV4() || IsBoundV6() ||	UsingProxy(); };
-			bool UsingProxy() const { return m_ProxyType != eNoProxy; };
-
-			void UseProxy(ProxyType proxy, const std::string & address, uint16_t port);
-
-			boost::asio::io_service& GetService () { return m_Service; };
-
-			void SetSessionLimits(uint16_t softLimit, uint16_t hardLimit) { m_SoftLimit = softLimit; m_HardLimit = hardLimit; }
-			bool ShouldLimit() const { return ShouldHardLimit() || ShouldSoftLimit(); }
-			void Work(std::shared_ptr<NTCPSession> conn, Pool::WorkFunc work)
-			{
-				m_CryptoPool->Offer({conn, work});
-			}
-		private:
-
-			/** @brief return true for hard limit */
-			bool ShouldHardLimit() const { return m_HardLimit && m_NTCPSessions.size() >= m_HardLimit; }
-
-			/** @brief return true for probabalistic soft backoff */
-			bool ShouldSoftLimit() const
-			{
-				auto sessions = m_NTCPSessions.size();
-				return sessions && m_SoftLimit && m_SoftLimit < sessions && ( rand() % sessions ) <= m_SoftLimit;
-			}
-			void Run ();
-			void HandleAccept (std::shared_ptr<NTCPSession> conn, const boost::system::error_code& error);
-			void HandleAcceptV6 (std::shared_ptr<NTCPSession> conn, const boost::system::error_code& error);
-
-			void HandleConnect (const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer);
-
-			void HandleProxyConnect(const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port, RemoteAddressType adddrtype);
-			void AfterSocksHandshake(std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port, RemoteAddressType adddrtype);
-
-			// timer
-			void ScheduleTermination ();
-			void HandleTerminationTimer (const boost::system::error_code& ecode);
-
-		private:
-
-			bool m_IsRunning;
-			std::thread * m_Thread;
-			boost::asio::io_service m_Service;
-			boost::asio::io_service::work m_Work;
-			boost::asio::deadline_timer m_TerminationTimer;
-			boost::asio::ip::tcp::acceptor * m_NTCPAcceptor, * m_NTCPV6Acceptor;
-			std::map<i2p::data::IdentHash, std::shared_ptr<NTCPSession> > m_NTCPSessions; // access from m_Thread only
-			std::list<std::shared_ptr<NTCPSession> > m_PendingIncomingSessions;
-
-			ProxyType m_ProxyType;
-			std::string m_ProxyAddress;
-			uint16_t m_ProxyPort;
-			boost::asio::ip::tcp::resolver m_Resolver;
-			boost::asio::ip::tcp::endpoint * m_ProxyEndpoint;
-
-			std::shared_ptr<Pool> m_CryptoPool;
-
-			uint16_t m_SoftLimit, m_HardLimit;
-		public:
-
-			// for HTTP/I2PControl
-			const decltype(m_NTCPSessions)& GetNTCPSessions () const { return m_NTCPSessions; };
-	};
-}
-}
-
-#endif
--- a/libi2pd/NetDb.cpp
+++ b/libi2pd/NetDb.cpp
@ -560,6 +560,9 @@ namespace data
 				updatedCount++;
 				continue;
 			}
+			// make router reachable back if too few routers
+			if (it.second->IsUnreachable () && total - deletedCount < NETDB_MIN_ROUTERS)	
+				it.second->SetUnreachable (false); 
 			// find & mark expired routers
 			if (it.second->UsesIntroducer ())
 			{
@ -575,7 +578,7 @@ namespace data
 				// delete RI file
 				m_Storage.Remove(ident);
 				deletedCount++;
-				if (total - deletedCount < NETDB_MIN_ROUTERS) checkForExpiration = false;
+				if (total - deletedCount < NETDB_MIN_ROUTERS) checkForExpiration = false;	
 			}
 		} // m_RouterInfos iteration

@ -610,7 +613,7 @@ namespace data
 		}
 	}

-	void NetDb::RequestDestination (const IdentHash& destination, RequestedDestination::RequestComplete requestComplete)
+	void NetDb::RequestDestination (const IdentHash& destination, RequestedDestination::RequestComplete requestComplete, bool direct)
 	{
 		auto dest = m_Requests.CreateRequest (destination, false, requestComplete); // non-exploratory
 		if (!dest)
@ -621,7 +624,23 @@ namespace data

 		auto floodfill = GetClosestFloodfill (destination, dest->GetExcludedPeers ());
 		if (floodfill)
-			transports.SendMessage (floodfill->GetIdentHash (), dest->CreateRequestMessage (floodfill->GetIdentHash ()));
+		{
+			if (direct)
+				transports.SendMessage (floodfill->GetIdentHash (), dest->CreateRequestMessage (floodfill->GetIdentHash ()));
+			else
+			{
+				auto pool = i2p::tunnel::tunnels.GetExploratoryPool ();
+				auto outbound = pool ? pool->GetNextOutboundTunnel () : nullptr;
+				auto inbound = pool ? pool->GetNextInboundTunnel () : nullptr;
+				if (outbound &&	inbound)
+					outbound->SendTunnelDataMsg (floodfill->GetIdentHash (), 0, dest->CreateRequestMessage (floodfill, inbound));
+				else
+				{
+					LogPrint (eLogError, "NetDb: ", destination.ToBase64(), " destination requested, but no tunnels found");
+					m_Requests.RequestComplete (destination, nullptr);	
+				}		
+			}		
+		}	
 		else
 		{
 			LogPrint (eLogError, "NetDb: ", destination.ToBase64(), " destination requested, but no floodfills found");
@ -775,37 +794,21 @@ namespace data
 					// reply to our destination. Try other floodfills
 					if (outbound && inbound)
 					{
-						std::vector<i2p::tunnel::TunnelMessageBlock> msgs;
 						auto count = dest->GetExcludedPeers ().size ();
 						if (count < 7)
 						{
 							auto nextFloodfill = GetClosestFloodfill (dest->GetDestination (), dest->GetExcludedPeers ());
 							if (nextFloodfill)
 							{
-								// tell floodfill about us
-								msgs.push_back (i2p::tunnel::TunnelMessageBlock
-									{
-										i2p::tunnel::eDeliveryTypeRouter,
-										nextFloodfill->GetIdentHash (), 0,
-										CreateDatabaseStoreMsg ()
-									});
-
 								// request destination
 								LogPrint (eLogDebug, "NetDb: Try ", key, " at ", count, " floodfill ", nextFloodfill->GetIdentHash ().ToBase64 ());
-								auto msg = dest->CreateRequestMessage (nextFloodfill, inbound);
-								msgs.push_back (i2p::tunnel::TunnelMessageBlock
-									{
-										i2p::tunnel::eDeliveryTypeRouter,
-										nextFloodfill->GetIdentHash (), 0, msg
-									});
+								outbound->SendTunnelDataMsg (nextFloodfill->GetIdentHash (), 0,
+									dest->CreateRequestMessage (nextFloodfill, inbound));
 								deleteDest = false;
 							}
 						}
 						else
 							LogPrint (eLogWarning, "NetDb: ", key, " was not found on ", count, " floodfills");
-
-						if (msgs.size () > 0)
-							outbound->SendTunnelDataMsg (msgs);
 					}
 				}

--- a/libi2pd/NetDb.hpp
+++ b/libi2pd/NetDb.hpp
@ -70,7 +70,7 @@ namespace data
 			std::shared_ptr<LeaseSet> FindLeaseSet (const IdentHash& destination) const;
 			std::shared_ptr<RouterProfile> FindRouterProfile (const IdentHash& ident) const;

-			void RequestDestination (const IdentHash& destination, RequestedDestination::RequestComplete requestComplete = nullptr);
+			void RequestDestination (const IdentHash& destination, RequestedDestination::RequestComplete requestComplete = nullptr, bool direct = true);
 			void RequestDestinationFrom (const IdentHash& destination, const IdentHash & from, bool exploritory, RequestedDestination::RequestComplete requestComplete = nullptr);

 			void HandleDatabaseStoreMsg (std::shared_ptr<const I2NPMessage> msg);
--- a/libi2pd/RouterContext.cpp
+++ b/libi2pd/RouterContext.cpp
@ -63,7 +63,6 @@ namespace i2p
 		bool ipv4;           i2p::config::GetOption("ipv4", ipv4);
 		bool ipv6;           i2p::config::GetOption("ipv6", ipv6);
 		bool ssu;            i2p::config::GetOption("ssu", ssu);
-		bool ntcp;           i2p::config::GetOption("ntcp", ntcp);
 		bool ntcp2;          i2p::config::GetOption("ntcp2.enabled", ntcp2);
 		bool nat;            i2p::config::GetOption("nat", nat);
 		std::string ifname;  i2p::config::GetOption("ifname", ifname);
@ -83,8 +82,6 @@ namespace i2p

 			if (ssu)
 				routerInfo.AddSSUAddress (host.c_str(), port, routerInfo.GetIdentHash ());
-			if (ntcp)
-				routerInfo.AddNTCPAddress (host.c_str(), port);
 		}
 		if (ipv6)
 		{
@ -99,8 +96,6 @@ namespace i2p

 			if (ssu)
 				routerInfo.AddSSUAddress (host.c_str(), port, routerInfo.GetIdentHash ());
-			if (ntcp)
-				routerInfo.AddNTCPAddress (host.c_str(), port);
 		}

 		routerInfo.SetCaps (i2p::data::RouterInfo::eReachable |
@ -115,20 +110,17 @@ namespace i2p
 		{
 			if (!m_NTCP2Keys) NewNTCP2Keys ();
 			UpdateNTCP2Address (true);
-			if (!ntcp) // NTCP2 should replace NTCP
+			bool published; i2p::config::GetOption("ntcp2.published", published);
+			if (published)
 			{
-				bool published; i2p::config::GetOption("ntcp2.published", published);
-				if (published)
+				PublishNTCP2Address (port, true);
+				if (ipv6)
 				{
-					PublishNTCP2Address (port, true);
-					if (ipv6)
-					{
-						// add NTCP2 ipv6 address
-						std::string host = "::1";
-						if (!i2p::config::IsDefault ("ntcp2.addressv6"))
-							i2p::config::GetOption ("ntcp2.addressv6", host);
-						m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address_v6::from_string (host), port);
-					}
+					// add NTCP2 ipv6 address
+					std::string host = "::1";
+					if (!i2p::config::IsDefault ("ntcp2.addressv6"))
+						i2p::config::GetOption ("ntcp2.addressv6", host);
+					m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address_v6::from_string (host), port);
 				}
 			}
 		}
@ -381,48 +373,19 @@ namespace i2p
 		return m_RouterInfo.GetCaps () & i2p::data::RouterInfo::eUnreachable;
 	}

-	void RouterContext::PublishNTCPAddress (bool publish, bool v4only)
+	void RouterContext::RemoveNTCPAddress (bool v4only)
 	{
 		auto& addresses = m_RouterInfo.GetAddresses ();
-		if (publish)
+		for (auto it = addresses.begin (); it != addresses.end ();)
 		{
-			for (const auto& addr : addresses) // v4
+			if ((*it)->transportStyle == i2p::data::RouterInfo::eTransportNTCP && !(*it)->IsNTCP2 () &&
+				(!v4only || (*it)->host.is_v4 ()))
 			{
-				if (addr->transportStyle == i2p::data::RouterInfo::eTransportSSU &&
-					addr->host.is_v4 ())
-				{
-					// insert NTCP address with host/port from SSU
-					m_RouterInfo.AddNTCPAddress (addr->host.to_string ().c_str (), addr->port);
-					break;
-				}
-			}
-			if (!v4only)
-			{
-				for (const auto& addr : addresses) // v6
-				{
-					if (addr->transportStyle == i2p::data::RouterInfo::eTransportSSU &&
-						addr->host.is_v6 ())
-					{
-						// insert NTCP address with host/port from SSU
-						m_RouterInfo.AddNTCPAddress (addr->host.to_string ().c_str (), addr->port);
-						break;
-					}
-				}
-			}
-		}
-		else
-		{
-			for (auto it = addresses.begin (); it != addresses.end ();)
-			{
-				if ((*it)->transportStyle == i2p::data::RouterInfo::eTransportNTCP && !(*it)->IsNTCP2 () &&
-					(!v4only || (*it)->host.is_v4 ()))
-				{
-					it = addresses.erase (it);
-					if (v4only) break; // otherwise might be more than one address
-				}
-				else
-					++it;
+				it = addresses.erase (it);
+				if (v4only) break; // otherwise might be more than one address
 			}
+			else
+				++it;
 		}
 	}

@ -444,16 +407,10 @@ namespace i2p
 				addr->ssu->introducers.clear ();
 				port = addr->port;
 			}
-		// remove NTCP or NTCP2 v4 address
-		bool ntcp;   i2p::config::GetOption("ntcp", ntcp);
-		if (ntcp)
-			PublishNTCPAddress (false);
-		else
-		{
-			bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
-			if (ntcp2)
-				PublishNTCP2Address (port, false, true);
-		}
+		// remove NTCP2 v4 address
+		bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
+		if (ntcp2)
+			PublishNTCP2Address (port, false, true);
 		// update
 		UpdateRouterInfo ();
 	}
@ -477,23 +434,16 @@ namespace i2p
 				addr->ssu->introducers.clear ();
 				port = addr->port;
 			}
-		// insert NTCP or NTCP2 back
-		bool ntcp;   i2p::config::GetOption("ntcp", ntcp);
-		if (ntcp)
-			PublishNTCPAddress (true);
-		else
+		// insert NTCP2 back
+		bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
+		if (ntcp2)
 		{
-			// ntcp2
-			bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
-			if (ntcp2)
+			bool published; i2p::config::GetOption ("ntcp2.published", published);
+			if (published)
 			{
-				bool published; i2p::config::GetOption ("ntcp2.published", published);
-				if (published)
-				{
-					uint16_t ntcp2Port; i2p::config::GetOption ("ntcp2.port", ntcp2Port);
-					if (!ntcp2Port) ntcp2Port = port;
-					PublishNTCP2Address (ntcp2Port, true, true);
-				}
+				uint16_t ntcp2Port; i2p::config::GetOption ("ntcp2.port", ntcp2Port);
+				if (!ntcp2Port) ntcp2Port = port;
+				PublishNTCP2Address (ntcp2Port, true, true);
 			}
 		}
 		// update
@ -506,7 +456,7 @@ namespace i2p
 		{
 			m_RouterInfo.EnableV6 ();
 			// insert v6 addresses if necessary
-			bool foundSSU = false, foundNTCP = false, foundNTCP2 = false;
+			bool foundSSU = false, foundNTCP2 = false;
 			uint16_t port = 0;
 			auto& addresses = m_RouterInfo.GetAddresses ();
 			for (auto& addr: addresses)
@ -515,12 +465,8 @@ namespace i2p
 				{
 					if (addr->transportStyle == i2p::data::RouterInfo::eTransportSSU)
 						foundSSU = true;
-					else if (addr->IsNTCP2 ())
-					{
-						if (addr->IsPublishedNTCP2 ()) foundNTCP2 = true;
-					}
-					else
-						foundNTCP = true;
+					else if (addr->IsPublishedNTCP2 ())
+						foundNTCP2 = true;
 				}
 				port = addr->port;
 			}
@ -552,16 +498,6 @@ namespace i2p
 					m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address::from_string (ntcp2Host), ntcp2Port);
 				}
 			}
-			// NTCP
-			if (!foundNTCP)
-			{
-				bool ntcp; i2p::config::GetOption("ntcp", ntcp);
-				if (ntcp)
-				{
-					std::string host = "::1";
-					m_RouterInfo.AddNTCPAddress (host.c_str (), port);
-				}
-			}
 		}
 		else
 			m_RouterInfo.DisableV6 ();
--- a/libi2pd/RouterContext.h
+++ b/libi2pd/RouterContext.h
@ -89,7 +89,7 @@ namespace i2p
 			void UpdateAddress (const boost::asio::ip::address& host);	// called from SSU or Daemon
 			void PublishNTCP2Address (int port, bool publish = true, bool v4only = false);
 			void UpdateNTCP2Address (bool enable);
-			void PublishNTCPAddress (bool publish, bool v4only = true);
+			void RemoveNTCPAddress (bool v4only = true); // delete NTCP address for older routers. TODO: remove later
 			bool AddIntroducer (const i2p::data::RouterInfo::Introducer& introducer);
 			void RemoveIntroducer (const boost::asio::ip::udp::endpoint& e);
 			bool IsUnreachable () const;
--- a/libi2pd/RouterInfo.cpp
+++ b/libi2pd/RouterInfo.cpp
@ -316,7 +316,7 @@ namespace data
 			}
 			if (introducers) supportedTransports |= eSSUV4; // in case if host is not presented
 			if (isNTCP2Only && address->ntcp2) address->ntcp2->isNTCP2Only = true;
-			if (supportedTransports)
+			if (supportedTransports & ~(eNTCPV4 | eNTCPV6)) // exclude NTCP only
 			{
 				addresses->push_back(address);
 				m_SupportedTransports |= supportedTransports;
@ -477,7 +477,12 @@ namespace data
 			s.write ((const char *)&address.date, sizeof (address.date));
 			std::stringstream properties;
 			if (address.transportStyle == eTransportNTCP)
-				WriteString (address.IsNTCP2 () ? "NTCP2" : "NTCP", s);
+			{
+				if (address.IsNTCP2 ())
+					WriteString ("NTCP2", s);
+				else
+					continue; // don't write NTCP address
+			}	
 			else if (address.transportStyle == eTransportSSU)
 			{
 				WriteString ("SSU", s);
@ -704,20 +709,6 @@ namespace data
 		s.write (str.c_str (), len);
 	}

-	void RouterInfo::AddNTCPAddress (const char * host, int port)
-	{
-		auto addr = std::make_shared<Address>();
-		addr->host = boost::asio::ip::address::from_string (host);
-		addr->port = port;
-		addr->transportStyle = eTransportNTCP;
-		addr->cost = 6;
-		addr->date = 0;
-		for (const auto& it: *m_Addresses) // don't insert same address twice
-			if (*it == *addr) return;
-		m_SupportedTransports |= addr->host.is_v6 () ? eNTCPV6 : eNTCPV4;
-		m_Addresses->push_front(std::move(addr)); // always make NTCP first
-	}
-
 	void RouterInfo::AddSSUAddress (const char * host, int port, const uint8_t * key, int mtu)
 	{
 		auto addr = std::make_shared<Address>();
@ -817,14 +808,6 @@ namespace data
 		return "";
 	}

-	bool RouterInfo::IsNTCP (bool v4only) const
-	{
-		if (v4only)
-			return m_SupportedTransports & eNTCPV4;
-		else
-			return m_SupportedTransports & (eNTCPV4 | eNTCPV6);
-	}
-
 	bool RouterInfo::IsSSU (bool v4only) const
 	{
 		if (v4only)
@ -907,15 +890,6 @@ namespace data
 		return m_Caps & Caps::eUnreachable; // non-reachable
 	}

-	std::shared_ptr<const RouterInfo::Address> RouterInfo::GetNTCPAddress (bool v4only) const
-	{
-		return GetAddress (
-			[v4only](std::shared_ptr<const RouterInfo::Address> address)->bool
-			{
-				return (address->transportStyle == eTransportNTCP) && !address->IsNTCP2Only () && (!v4only || address->host.is_v4 ());
-			});
-	}
-
 	std::shared_ptr<const RouterInfo::Address> RouterInfo::GetSSUAddress (bool v4only) const
 	{
 		return GetAddress (
--- a/libi2pd/RouterInfo.h
+++ b/libi2pd/RouterInfo.h
@ -153,12 +153,10 @@ namespace data
 			uint64_t GetTimestamp () const { return m_Timestamp; };
 			int GetVersion () const { return m_Version; };
 			Addresses& GetAddresses () { return *m_Addresses; }; // should be called for local RI only, otherwise must return shared_ptr
-			std::shared_ptr<const Address> GetNTCPAddress (bool v4only = true) const;
 			std::shared_ptr<const Address> GetNTCP2Address (bool publishedOnly,  bool v4only = true) const;
 			std::shared_ptr<const Address> GetSSUAddress (bool v4only = true) const;
 			std::shared_ptr<const Address> GetSSUV6Address () const;

-			void AddNTCPAddress (const char * host, int port);
 			void AddSSUAddress (const char * host, int port, const uint8_t * key, int mtu = 0);
 			void AddNTCP2Address (const uint8_t * staticKey, const uint8_t * iv, const boost::asio::ip::address& host = boost::asio::ip::address(), int port = 0);
 			bool AddIntroducer (const Introducer& introducer);
@ -169,7 +167,6 @@ namespace data
 			void ClearProperties () { m_Properties.clear (); };
 			bool IsFloodfill () const { return m_Caps & Caps::eFloodfill; };
 			bool IsReachable () const { return m_Caps & Caps::eReachable; };
-			bool IsNTCP (bool v4only = true) const;
 			bool IsSSU (bool v4only = true) const;
 			bool IsSSUV6 () const;
 			bool IsNTCP2 (bool v4only = true) const;
--- a/libi2pd/SSU.cpp
+++ b/libi2pd/SSU.cpp
@ -7,7 +7,6 @@
 */

 #include <string.h>
-#include <boost/bind.hpp>
 #include "Log.h"
 #include "Timestamp.h"
 #include "RouterContext.h"
--- a/libi2pd/SSUData.cpp
+++ b/libi2pd/SSUData.cpp
@ -7,7 +7,6 @@
 */

 #include <stdlib.h>
-#include <boost/bind.hpp>
 #include "Log.h"
 #include "Timestamp.h"
 #include "NetDb.hpp"
--- a/libi2pd/SSUSession.cpp
+++ b/libi2pd/SSUSession.cpp
@ -6,7 +6,6 @@
 * See full license text in LICENSE file at top of project tree
 */

-#include <boost/bind.hpp>
 #include "version.h"
 #include "Crypto.h"
 #include "Log.h"
--- a/libi2pd/Streaming.cpp
+++ b/libi2pd/Streaming.cpp
@ -351,6 +351,28 @@ namespace stream
 		return true;
 	}

+	void Stream::HandlePing (Packet * packet)
+	{
+		uint16_t flags = packet->GetFlags ();
+		if (ProcessOptions (flags, packet) && m_RemoteIdentity)
+		{
+			// send pong
+			Packet p;
+			memset (p.buf, 0, 22); // minimal header all zeroes
+			memcpy (p.buf + 4, packet->buf, 4); // but receiveStreamID is the sendStreamID from the ping
+			htobe16buf (p.buf + 18, PACKET_FLAG_ECHO); // and echo flag
+			ssize_t payloadLen = packet->len - (packet->GetPayload () - packet->buf);
+			if (payloadLen > 0)
+				memcpy (p.buf + 22, packet->GetPayload (), payloadLen);
+			else
+				payloadLen = 0;
+			p.len = payloadLen + 22;
+			SendPackets (std::vector<Packet *> { &p });
+			LogPrint (eLogDebug, "Streaming: Pong of ", p.len, " bytes sent");
+		}	
+		m_LocalDestination.DeletePacket (packet);
+	}	
+		
 	void Stream::ProcessAck (Packet * packet)
 	{
 		bool acknowledged = false;
@ -609,6 +631,7 @@ namespace stream
 			packet[size] = 0;
 			size++; // NACK count
 		}
+		packet[size] = 0;
 		size++; // resend delay
 		htobuf16 (packet + size, 0); // no flags set
 		size += 2; // flags
@ -666,6 +689,7 @@ namespace stream
 		size += 4; // ack Through
 		packet[size] = 0;
 		size++; // NACK count
+		packet[size] = 0;
 		size++; // resend delay
 		htobe16buf (packet + size, PACKET_FLAG_CLOSE | PACKET_FLAG_SIGNATURE_INCLUDED);
 		size += 2; // flags
@ -1016,6 +1040,13 @@ namespace stream
 			auto it = m_Streams.find (sendStreamID);
 			if (it != m_Streams.end ())
 				it->second->HandleNextPacket (packet);
+			else if (packet->IsEcho () && m_Owner->IsStreamingAnswerPings ())
+			{
+				// ping
+				LogPrint (eLogInfo, "Streaming: Ping received sSID=", sendStreamID);
+				auto s = std::make_shared<Stream> (m_Owner->GetService (), *this);
+				s->HandlePing (packet);
+			}		
 			else
 			{
 				LogPrint (eLogInfo, "Streaming: Unknown stream sSID=", sendStreamID);
--- a/libi2pd/Streaming.h
+++ b/libi2pd/Streaming.h
@ -87,6 +87,7 @@ namespace stream

 		bool IsSYN () const { return GetFlags () & PACKET_FLAG_SYNCHRONIZE; };
 		bool IsNoAck () const { return GetFlags () & PACKET_FLAG_NO_ACK; };
+		bool IsEcho () const { return GetFlags () & PACKET_FLAG_ECHO; };
 	};

 	struct PacketCmp
@ -168,6 +169,7 @@ namespace stream
 			StreamingDestination& GetLocalDestination () { return m_LocalDestination; };

 			void HandleNextPacket (Packet * packet);
+			void HandlePing (Packet * packet);
 			size_t Send (const uint8_t * buf, size_t len);
 			void AsyncSend (const uint8_t * buf, size_t len, SendHandler handler);

--- a/libi2pd/Transports.cpp
+++ b/libi2pd/Transports.cpp
@ -133,7 +133,7 @@ namespace transport
 	Transports::Transports ():
 		m_IsOnline (true), m_IsRunning (false), m_IsNAT (true), m_Thread (nullptr), m_Service (nullptr),
 		m_Work (nullptr), m_PeerCleanupTimer (nullptr), m_PeerTestTimer (nullptr),
-		m_NTCPServer (nullptr), m_SSUServer (nullptr), m_NTCP2Server (nullptr),
+		m_SSUServer (nullptr), m_NTCP2Server (nullptr),
 		m_DHKeysPairSupplier (5), m_X25519KeysPairSupplier (5), // 5 pre-generated keys
 		m_TotalSentBytes(0), m_TotalReceivedBytes(0), m_TotalTransitTransmittedBytes (0),
 		m_InBandwidth (0), m_OutBandwidth (0), m_TransitBandwidth(0),
@ -154,7 +154,7 @@ namespace transport
 		}
 	}

-	void Transports::Start (bool enableNTCP, bool enableSSU)
+	void Transports::Start (bool enableNTCP2, bool enableSSU)
 	{
 		if (!m_Service)
 		{
@ -169,50 +169,10 @@ namespace transport
 		m_X25519KeysPairSupplier.Start ();
 		m_IsRunning = true;
 		m_Thread = new std::thread (std::bind (&Transports::Run, this));
-		std::string ntcpproxy; i2p::config::GetOption("ntcpproxy", ntcpproxy);
 		std::string ntcp2proxy; i2p::config::GetOption("ntcp2.proxy", ntcp2proxy);
-		i2p::http::URL proxyurl;
-		uint16_t softLimit, hardLimit, threads;
-		i2p::config::GetOption("limits.ntcpsoft", softLimit);
-		i2p::config::GetOption("limits.ntcphard", hardLimit);
-		i2p::config::GetOption("limits.ntcpthreads", threads);
-		if(softLimit > 0 && hardLimit > 0 && softLimit >= hardLimit)
-		{
-			LogPrint(eLogError, "ntcp soft limit must be less than ntcp hard limit");
-			return;
-		}
-		if(ntcpproxy.size() && enableNTCP)
-		{
-			if(proxyurl.parse(ntcpproxy))
-			{
-				if(proxyurl.schema == "socks" || proxyurl.schema == "http")
-				{
-					m_NTCPServer = new NTCPServer(threads);
-					m_NTCPServer->SetSessionLimits(softLimit, hardLimit);
-					NTCPServer::ProxyType proxytype = NTCPServer::eSocksProxy;
-
-					if (proxyurl.schema == "http")
-						proxytype = NTCPServer::eHTTPProxy;
-					m_NTCPServer->UseProxy(proxytype, proxyurl.host, proxyurl.port);
-					m_NTCPServer->Start();
-					if(!m_NTCPServer->NetworkIsReady())
-					{
-						LogPrint(eLogError, "Transports: NTCP failed to start with proxy");
-						m_NTCPServer->Stop();
-						delete m_NTCPServer;
-						m_NTCPServer = nullptr;
-					}
-				}
-				else
-					LogPrint(eLogError, "Transports: unsupported NTCP proxy URL ", ntcpproxy);
-			}
-			else
-				LogPrint(eLogError, "Transports: invalid NTCP proxy url ", ntcpproxy);
-			return;
-		}
+		i2p::http::URL proxyurl;	
 		// create NTCP2. TODO: move to acceptor
-		bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
-		if (ntcp2)
+		if (enableNTCP2)
 		{
 			if(!ntcp2proxy.empty())
 			{
@ -248,20 +208,6 @@ namespace transport
 		for (const auto& address : addresses)
 		{
 			if (!address) continue;
-			if (m_NTCPServer == nullptr && enableNTCP)
-			{
-				m_NTCPServer = new NTCPServer (threads);
-				m_NTCPServer->SetSessionLimits(softLimit, hardLimit);
-				m_NTCPServer->Start ();
-				if (!(m_NTCPServer->IsBoundV6() || m_NTCPServer->IsBoundV4())) {
-					/** failed to bind to NTCP */
-					LogPrint(eLogError, "Transports: failed to bind to TCP");
-					m_NTCPServer->Stop();
-					delete m_NTCPServer;
-					m_NTCPServer = nullptr;
-				}
-			}
-
 			if (address->transportStyle == RouterInfo::eTransportSSU)
 			{
 				if (m_SSUServer == nullptr && enableSSU)
@ -306,13 +252,7 @@ namespace transport
 			delete m_SSUServer;
 			m_SSUServer = nullptr;
 		}
-		if (m_NTCPServer)
-		{
-			m_NTCPServer->Stop ();
-			delete m_NTCPServer;
-			m_NTCPServer = nullptr;
-		}
-
+		
 		if (m_NTCP2Server)
 		{
 			m_NTCP2Server->Stop ();
@ -472,41 +412,7 @@ namespace transport
 					}
 				}
 			}
-			if (peer.numAttempts == 1) // NTCP1
-			{
-				peer.numAttempts++;
-				auto address = peer.router->GetNTCPAddress (!context.SupportsV6 ());
-				if (address && m_NTCPServer)
-				{
-					if (!peer.router->UsesIntroducer () && !peer.router->IsUnreachable ())
-					{
-						if(!m_NTCPServer->ShouldLimit())
-						{
-							auto s = std::make_shared<NTCPSession> (*m_NTCPServer, peer.router);
-							if(m_NTCPServer->UsingProxy())
-							{
-								NTCPServer::RemoteAddressType remote = NTCPServer::eIP4Address;
-								std::string addr = address->host.to_string();
-
-								if(address->host.is_v6())
-									remote = NTCPServer::eIP6Address;
-
-								m_NTCPServer->ConnectWithProxy(addr, address->port, remote, s);
-							}
-							else
-								m_NTCPServer->Connect (address->host, address->port, s);
-							return true;
-						}
-						else
-						{
-							LogPrint(eLogWarning, "Transports: NTCP Limit hit falling back to SSU");
-						}
-					}
-				}
-				else
-					LogPrint (eLogDebug, "Transports: NTCP address is not present for ", i2p::data::GetIdentHashAbbreviation (ident), ", trying SSU");
-			}
-			if (peer.numAttempts == 2)// SSU
+			if (peer.numAttempts == 1)// SSU
 			{
 				peer.numAttempts++;
 				if (m_SSUServer && peer.router->IsSSU (!context.SupportsV6 ()))
--- a/libi2pd/Transports.h
+++ b/libi2pd/Transports.h
@ -21,7 +21,6 @@
 #include <atomic>
 #include <boost/asio.hpp>
 #include "TransportSession.h"
-#include "NTCPSession.h"
 #include "SSU.h"
 #include "NTCP2.h"
 #include "RouterInfo.h"
@ -88,10 +87,9 @@ namespace transport
 			Transports ();
 			~Transports ();

-			void Start (bool enableNTCP=true, bool enableSSU=true);
+			void Start (bool enableNTCP2=true, bool enableSSU=true);
 			void Stop ();

-			bool IsBoundNTCP() const { return m_NTCPServer != nullptr; }
 			bool IsBoundSSU() const { return m_SSUServer != nullptr; }
 			bool IsBoundNTCP2() const { return m_NTCP2Server != nullptr; }

@ -159,7 +157,6 @@ namespace transport
 			boost::asio::io_service::work * m_Work;
 			boost::asio::deadline_timer * m_PeerCleanupTimer, * m_PeerTestTimer;

-			NTCPServer * m_NTCPServer;
 			SSUServer * m_SSUServer;
 			NTCP2Server * m_NTCP2Server;
 			mutable std::mutex m_PeersMutex;
@ -186,7 +183,6 @@ namespace transport
 		public:

 			// for HTTP only
-			const NTCPServer * GetNTCPServer () const { return m_NTCPServer; };
 			const SSUServer * GetSSUServer () const { return m_SSUServer; };
 			const NTCP2Server * GetNTCP2Server () const { return m_NTCP2Server; };
 			const decltype(m_Peers)& GetPeers () const { return m_Peers; };
--- a/libi2pd/Tunnel.h
+++ b/libi2pd/Tunnel.h
@ -36,7 +36,7 @@ namespace tunnel
 	const int TUNNEL_EXPIRATION_THRESHOLD = 60; // 1 minute
 	const int TUNNEL_RECREATION_THRESHOLD = 90; // 1.5 minutes
 	const int TUNNEL_CREATION_TIMEOUT = 30; // 30 seconds
-	const int STANDARD_NUM_RECORDS = 5; // in VariableTunnelBuild message
+	const int STANDARD_NUM_RECORDS = 4; // in VariableTunnelBuild message

 	enum TunnelState
 	{
--- a/libi2pd_client/AddressBook.cpp
+++ b/libi2pd_client/AddressBook.cpp
@ -806,6 +806,7 @@ namespace client
 		i2p::http::HTTPReq req;
 		req.AddHeader("Host", dest_host);
 		req.AddHeader("User-Agent", "Wget/1.11.4");
+		req.AddHeader("Accept-Encoding", "gzip");
 		req.AddHeader("X-Accept-Encoding", "x-i2p-gzip;q=1.0, identity;q=0.5, deflate;q=0, gzip;q=0, *;q=0");
 		req.AddHeader("Connection", "close");
 		if (!m_Etag.empty())
@ -816,6 +817,7 @@ namespace client
 		url.schema = "";
 		url.host   = "";
 		req.uri    = url.to_string();
+		req.version = "HTTP/1.1";
 		auto stream = i2p::client::context.GetSharedLocalDestination ()->CreateStream (leaseSet, dest_port);
 		std::string request = req.to_string();
 		stream->Send ((const uint8_t *) request.data(), request.length());
@ -887,7 +889,7 @@ namespace client
 		/* assert: res.code == 200 */
 		auto it = res.headers.find("ETag");
 		if (it != res.headers.end()) m_Etag = it->second;
-		it = res.headers.find("If-Modified-Since");
+		it = res.headers.find("Last-Modified");
 		if (it != res.headers.end()) m_LastModified = it->second;
 		if (res.is_chunked())
 		{
@ -895,7 +897,7 @@ namespace client
 			i2p::http::MergeChunkedResponse (in, out);
 			response = out.str();
 		}
-		else if (res.is_gzipped())
+		if (res.is_gzipped())
 		{
 			std::stringstream out;
 			i2p::data::GzipInflator inflator;
--- a/libi2pd_client/ClientContext.cpp
+++ b/libi2pd_client/ClientContext.cpp
@ -102,10 +102,11 @@ namespace client
 		{
 			std::string i2cpAddr; i2p::config::GetOption("i2cp.address", i2cpAddr);
 			uint16_t i2cpPort; i2p::config::GetOption("i2cp.port", i2cpPort);
+			bool singleThread; i2p::config::GetOption("i2cp.singlethread", singleThread);
 			LogPrint(eLogInfo, "Clients: starting I2CP at ", i2cpAddr, ":", i2cpPort);
 			try
 			{
-				m_I2CPServer = new I2CPServer (i2cpAddr, i2cpPort);
+				m_I2CPServer = new I2CPServer (i2cpAddr, i2cpPort, singleThread);
 				m_I2CPServer->Start ();
 			}
 			catch (std::exception& e)
@ -401,7 +402,14 @@ namespace client

 	void ClientContext::CreateNewSharedLocalDestination ()
 	{
-		m_SharedLocalDestination = CreateNewLocalDestination (); // non-public, EDDSA
+		std::map<std::string, std::string> params 
+		{
+			{ I2CP_PARAM_INBOUND_TUNNELS_QUANTITY, "2" },
+			{ I2CP_PARAM_OUTBOUND_TUNNELS_QUANTITY, "2" },
+			{ I2CP_PARAM_LEASESET_TYPE, "3" }
+		};
+		m_SharedLocalDestination = CreateNewLocalDestination (false, i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519,
+			i2p::data::CRYPTO_KEY_TYPE_ELGAMAL, &params); // non-public, EDDSA
 		m_SharedLocalDestination->Acquire ();
 	}

@ -436,7 +444,7 @@ namespace client
 	}

 	template<typename Section>
-	void ClientContext::ReadI2CPOptions (const Section& section, std::map<std::string, std::string>& options) const
+	void ClientContext::ReadI2CPOptions (const Section& section, bool isServer, std::map<std::string, std::string>& options) const
 	{
 		options[I2CP_PARAM_INBOUND_TUNNEL_LENGTH] = GetI2CPOption (section, I2CP_PARAM_INBOUND_TUNNEL_LENGTH, DEFAULT_INBOUND_TUNNEL_LENGTH);
 		options[I2CP_PARAM_OUTBOUND_TUNNEL_LENGTH] = GetI2CPOption (section, I2CP_PARAM_OUTBOUND_TUNNEL_LENGTH, DEFAULT_OUTBOUND_TUNNEL_LENGTH);
@ -446,6 +454,7 @@ namespace client
 		options[I2CP_PARAM_MIN_TUNNEL_LATENCY] = GetI2CPOption(section, I2CP_PARAM_MIN_TUNNEL_LATENCY, DEFAULT_MIN_TUNNEL_LATENCY);
 		options[I2CP_PARAM_MAX_TUNNEL_LATENCY] = GetI2CPOption(section, I2CP_PARAM_MAX_TUNNEL_LATENCY, DEFAULT_MAX_TUNNEL_LATENCY);
 		options[I2CP_PARAM_STREAMING_INITIAL_ACK_DELAY] = GetI2CPOption(section, I2CP_PARAM_STREAMING_INITIAL_ACK_DELAY, DEFAULT_INITIAL_ACK_DELAY);
+		options[I2CP_PARAM_STREAMING_ANSWER_PINGS] = GetI2CPOption(section, I2CP_PARAM_STREAMING_ANSWER_PINGS, isServer ? DEFAULT_ANSWER_PINGS : false);
 		options[I2CP_PARAM_LEASESET_TYPE] = GetI2CPOption(section, I2CP_PARAM_LEASESET_TYPE, DEFAULT_LEASESET_TYPE);
 		std::string encType = GetI2CPStringOption(section, I2CP_PARAM_LEASESET_ENCRYPTION_TYPE, "");
 		if (encType.length () > 0) options[I2CP_PARAM_LEASESET_ENCRYPTION_TYPE] = encType;
@ -561,7 +570,7 @@ namespace client
 					i2p::data::CryptoKeyType cryptoType = section.second.get (I2P_CLIENT_TUNNEL_CRYPTO_TYPE, i2p::data::CRYPTO_KEY_TYPE_ELGAMAL);
 					// I2CP
 					std::map<std::string, std::string> options;
-					ReadI2CPOptions (section, options);
+					ReadI2CPOptions (section, false, options);

 					std::shared_ptr<ClientDestination> localDestination = nullptr;
 					if (keys.length () > 0)
@ -685,7 +694,7 @@ namespace client

 					// I2CP
 					std::map<std::string, std::string> options;
-					ReadI2CPOptions (section, options);
+					ReadI2CPOptions (section, true, options);

 					std::shared_ptr<ClientDestination> localDestination = nullptr;
 					auto it = destinations.find (keys);
@ -837,6 +846,8 @@ namespace client
 		bool socksproxy; i2p::config::GetOption("socksproxy.enabled", socksproxy);
 		if (socksproxy)
 		{
+			std::string httpProxyKeys;         i2p::config::GetOption("httpproxy.keys",          httpProxyKeys);
+			// we still need httpProxyKeys to compare with sockProxyKeys
 			std::string socksProxyKeys;        i2p::config::GetOption("socksproxy.keys",             socksProxyKeys);
 			std::string socksProxyAddr;        i2p::config::GetOption("socksproxy.address",          socksProxyAddr);
 			uint16_t    socksProxyPort;        i2p::config::GetOption("socksproxy.port",             socksProxyPort);
@ -845,7 +856,12 @@ namespace client
 			uint16_t    socksOutProxyPort;     i2p::config::GetOption("socksproxy.outproxyport",     socksOutProxyPort);
 			i2p::data::SigningKeyType sigType; i2p::config::GetOption("socksproxy.signaturetype",    sigType);
 			LogPrint(eLogInfo, "Clients: starting SOCKS Proxy at ", socksProxyAddr, ":", socksProxyPort);
-			if (socksProxyKeys.length () > 0)
+			if (httpProxyKeys == socksProxyKeys && m_HttpProxy)
+			{
+				localDestination = m_HttpProxy->GetLocalDestination ();
+				localDestination->Acquire ();
+			}	
+			else if (socksProxyKeys.length () > 0)
 			{
 				i2p::data::PrivateKeys keys;
 				if (LoadPrivateKeys (keys, socksProxyKeys, sigType))
--- a/libi2pd_client/ClientContext.h
+++ b/libi2pd_client/ClientContext.h
@ -115,7 +115,7 @@ namespace client
 			template<typename Section>
 			void ReadI2CPOptionsGroup (const Section& section, const std::string& group,  std::map<std::string, std::string>& options) const;
 			template<typename Section>
-			void ReadI2CPOptions (const Section& section, std::map<std::string, std::string>& options) const; // for tunnels
+			void ReadI2CPOptions (const Section& section, bool isServer, std::map<std::string, std::string>& options) const; // for tunnels
 			void ReadI2CPOptionsFromConfig (const std::string& prefix, std::map<std::string, std::string>& options) const; // for HTTP and SOCKS proxy

 			void CleanupUDP(const boost::system::error_code & ecode);
--- a/libi2pd_client/I2CP.cpp
+++ b/libi2pd_client/I2CP.cpp
@ -23,36 +23,13 @@ namespace i2p
 namespace client
 {

-	I2CPDestination::I2CPDestination (std::shared_ptr<I2CPSession> owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
-		RunnableService ("I2CP"), LeaseSetDestination (GetIOService (), isPublic, &params),
+	I2CPDestination::I2CPDestination (boost::asio::io_service& service, std::shared_ptr<I2CPSession> owner, 
+	    std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
+		LeaseSetDestination (service, isPublic, &params),
 		m_Owner (owner), m_Identity (identity), m_EncryptionKeyType (m_Identity->GetCryptoKeyType ())
 	{
 	}

-	I2CPDestination::~I2CPDestination ()
-	{
-		if (IsRunning ())
-			Stop ();
-	}
-
-	void I2CPDestination::Start ()
-	{
-		if (!IsRunning ())
-		{
-			LeaseSetDestination::Start ();
-			StartIOService ();
-		}
-	}
-
-	void I2CPDestination::Stop ()
-	{
-		if (IsRunning ())
-		{
-			LeaseSetDestination::Stop ();
-			StopIOService ();
-		}
-	}
-
 	void I2CPDestination::SetEncryptionPrivateKey (const uint8_t * key)
 	{
 		m_Decryptor = i2p::data::PrivateKeys::CreateDecryptor (m_Identity->GetCryptoKeyType (), key);
@ -217,6 +194,37 @@ namespace client
 		}
 	}

+	RunnableI2CPDestination::RunnableI2CPDestination (std::shared_ptr<I2CPSession> owner, 
+		std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
+		RunnableService ("I2CP"),
+		I2CPDestination (GetIOService (), owner, identity, isPublic, params)
+	{
+	}	
+
+	RunnableI2CPDestination::~RunnableI2CPDestination ()
+	{
+		if (IsRunning ())
+			Stop ();
+	}	
+
+	void RunnableI2CPDestination::Start ()
+	{
+		if (!IsRunning ())
+		{
+			I2CPDestination::Start ();
+			StartIOService ();
+		}
+	}
+
+	void RunnableI2CPDestination::Stop ()
+	{
+		if (IsRunning ())
+		{
+			I2CPDestination::Stop ();
+			StopIOService ();
+		}
+	}
+		
 	I2CPSession::I2CPSession (I2CPServer& owner, std::shared_ptr<proto::socket> socket):
 		m_Owner (owner), m_Socket (socket), m_Payload (nullptr),
 		m_SessionID (0xFFFF), m_MessageID (0), m_IsSendAccepted (true)
@ -451,7 +459,9 @@ namespace client
 			if (params[I2CP_PARAM_DONT_PUBLISH_LEASESET] == "true") isPublic = false;
 			if (!m_Destination)
 			{
-				m_Destination = std::make_shared<I2CPDestination>(shared_from_this (), identity, isPublic, params);
+				m_Destination = m_Owner.IsSingleThread () ?
+					std::make_shared<I2CPDestination>(m_Owner.GetService (), shared_from_this (), identity, isPublic, params):
+					std::make_shared<RunnableI2CPDestination>(shared_from_this (), identity, isPublic, params);
 				SendSessionStatusMessage (1); // created
 				LogPrint (eLogDebug, "I2CP: session ", m_SessionID, " created");
 				m_Destination->Start ();
@ -800,9 +810,9 @@ namespace client
 			std::placeholders::_1, std::placeholders::_2, buf));
 	}

-	I2CPServer::I2CPServer (const std::string& interface, int port):
-		m_IsRunning (false), m_Thread (nullptr),
-		m_Acceptor (m_Service,
+	I2CPServer::I2CPServer (const std::string& interface, int port, bool isSingleThread):
+		RunnableService ("I2CP"), m_IsSingleThread (isSingleThread),
+		m_Acceptor (GetIOService (),
 #ifdef ANDROID
 			I2CPSession::proto::endpoint(std::string (1, '\0') + interface)) // leading 0 for abstract address
 #else
@ -825,20 +835,18 @@ namespace client

 	I2CPServer::~I2CPServer ()
 	{
-		if (m_IsRunning)
+		if (IsRunning ())
 			Stop ();
 	}

 	void I2CPServer::Start ()
 	{
 		Accept ();
-		m_IsRunning = true;
-		m_Thread = new std::thread (std::bind (&I2CPServer::Run, this));
+		StartIOService ();
 	}

 	void I2CPServer::Stop ()
 	{
-		m_IsRunning = false;
 		m_Acceptor.cancel ();
 		{
 			auto sessions = m_Sessions;
@ -846,33 +854,12 @@ namespace client
 				it.second->Stop ();
 		}
 		m_Sessions.clear ();
-		m_Service.stop ();
-		if (m_Thread)
-		{
-			m_Thread->join ();
-			delete m_Thread;
-			m_Thread = nullptr;
-		}
-	}
-
-	void I2CPServer::Run ()
-	{
-		while (m_IsRunning)
-		{
-			try
-			{
-				m_Service.run ();
-			}
-			catch (std::exception& ex)
-			{
-				LogPrint (eLogError, "I2CP: runtime exception: ", ex.what ());
-			}
-		}
+		StopIOService ();
 	}

 	void I2CPServer::Accept ()
 	{
-		auto newSocket = std::make_shared<I2CPSession::proto::socket> (m_Service);
+		auto newSocket = std::make_shared<I2CPSession::proto::socket> (GetIOService ());
 		m_Acceptor.async_accept (*newSocket, std::bind (&I2CPServer::HandleAccept, this,
 			std::placeholders::_1, newSocket));
 	}
--- a/libi2pd_client/I2CP.h
+++ b/libi2pd_client/I2CP.h
@ -63,16 +63,14 @@ namespace client
 	const char I2CP_PARAM_MESSAGE_RELIABILITY[] = "i2cp.messageReliability";

 	class I2CPSession;
-	class I2CPDestination: private i2p::util::RunnableService, public LeaseSetDestination
+	class I2CPDestination: public LeaseSetDestination
 	{
 		public:

-			I2CPDestination (std::shared_ptr<I2CPSession> owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params);
-			~I2CPDestination ();
-
-			void Start ();
-			void Stop ();
-
+			I2CPDestination (boost::asio::io_service& service, std::shared_ptr<I2CPSession> owner, 
+				std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params);
+			~I2CPDestination () {};
+			
 			void SetEncryptionPrivateKey (const uint8_t * key);
 			void SetEncryptionType (i2p::data::CryptoKeyType keyType) { m_EncryptionKeyType = keyType; };
 			void SetECIESx25519EncryptionPrivateKey (const uint8_t * key);
@ -109,6 +107,18 @@ namespace client
 			uint64_t m_LeaseSetExpirationTime;
 	};

+	class RunnableI2CPDestination: private i2p::util::RunnableService, public I2CPDestination 
+	{
+		public:
+
+			RunnableI2CPDestination (std::shared_ptr<I2CPSession> owner, std::shared_ptr<const i2p::data::IdentityEx> identity, 
+				bool isPublic, const std::map<std::string, std::string>& params);	
+			~RunnableI2CPDestination ();
+
+			void Start ();
+			void Stop ();
+	};	
+	
 	class I2CPServer;
 	class I2CPSession: public std::enable_shared_from_this<I2CPSession>
 	{
@ -179,17 +189,18 @@ namespace client
 	};
 	typedef void (I2CPSession::*I2CPMessageHandler)(const uint8_t * buf, size_t len);

-	class I2CPServer
+	class I2CPServer: private i2p::util::RunnableService
 	{
 		public:

-			I2CPServer (const std::string& interface, int port);
+			I2CPServer (const std::string& interface, int port, bool isSingleThread);
 			~I2CPServer ();

 			void Start ();
 			void Stop ();
-			boost::asio::io_service& GetService () { return m_Service; };
-
+			boost::asio::io_service& GetService () { return GetIOService (); };
+			bool IsSingleThread () const { return m_IsSingleThread; };
+			
 			bool InsertSession (std::shared_ptr<I2CPSession> session);
 			void RemoveSession (uint16_t sessionID);

@ -203,12 +214,10 @@ namespace client

 		private:

+			bool m_IsSingleThread;
 			I2CPMessageHandler m_MessagesHandlers[256];
 			std::map<uint16_t, std::shared_ptr<I2CPSession> > m_Sessions;

-			bool m_IsRunning;
-			std::thread * m_Thread;
-			boost::asio::io_service m_Service;
 			I2CPSession::proto::acceptor m_Acceptor;

 		public:
--- a/libi2pd_client/I2PTunnel.cpp
+++ b/libi2pd_client/I2PTunnel.cpp
@ -139,22 +139,25 @@ namespace client
 			}
 		}
 		else
-		{
-			if (m_Stream)
-			{
-				auto s = shared_from_this ();
-				m_Stream->AsyncSend (m_Buffer, bytes_transferred,
-					[s](const boost::system::error_code& ecode)
-					{
-						if (!ecode)
-							s->Receive ();
-						else
-							s->Terminate ();
-					});
-			}
-		}
+			WriteToStream (m_Buffer, bytes_transferred);
 	}

+	void I2PTunnelConnection::WriteToStream (const uint8_t * buf, size_t len)
+	{
+		if (m_Stream)
+		{
+			auto s = shared_from_this ();
+			m_Stream->AsyncSend (buf, len,
+				[s](const boost::system::error_code& ecode)
+				{
+					if (!ecode)
+						s->Receive ();
+					else
+						s->Terminate ();
+				});
+			}
+	}	
+		
 	void I2PTunnelConnection::HandleWrite (const boost::system::error_code& ecode)
 	{
 		if (ecode)
@ -302,7 +305,8 @@ namespace client
 	I2PServerTunnelConnectionHTTP::I2PServerTunnelConnectionHTTP (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
 		std::shared_ptr<boost::asio::ip::tcp::socket> socket,
 		const boost::asio::ip::tcp::endpoint& target, const std::string& host):
-		I2PTunnelConnection (owner, stream, socket, target), m_Host (host), m_HeaderSent (false), m_From (stream->GetRemoteIdentity ())
+		I2PTunnelConnection (owner, stream, socket, target), m_Host (host), 
+		m_HeaderSent (false), m_ResponseHeaderSent (false), m_From (stream->GetRemoteIdentity ())
 	{
 	}

@ -324,7 +328,7 @@ namespace client
 					if (line == "\r") endOfHeader = true;
 					else
 					{
-						if (m_Host.length () > 0 && line.find ("Host:") != std::string::npos)
+						if (m_Host.length () > 0 && !line.compare(0, 5, "Host:"))
 							m_OutHeader << "Host: " << m_Host << "\r\n"; // override host
 						else
 							m_OutHeader << line << "\n";
@ -333,12 +337,63 @@ namespace client
 				else
 					break;
 			}
-			// add X-I2P fields
-			if (m_From)
+
+			if (endOfHeader)
 			{
-				m_OutHeader << X_I2P_DEST_B32 << ": " << context.GetAddressBook ().ToAddress(m_From->GetIdentHash ()) << "\r\n";
-				m_OutHeader << X_I2P_DEST_HASH << ": " << m_From->GetIdentHash ().ToBase64 () << "\r\n";
-				m_OutHeader << X_I2P_DEST_B64 << ": " << m_From->ToBase64 () << "\r\n";
+				// add X-I2P fields
+				if (m_From)
+				{
+					m_OutHeader << X_I2P_DEST_B32 << ": " << context.GetAddressBook ().ToAddress(m_From->GetIdentHash ()) << "\r\n";
+					m_OutHeader << X_I2P_DEST_HASH << ": " << m_From->GetIdentHash ().ToBase64 () << "\r\n";
+					m_OutHeader << X_I2P_DEST_B64 << ": " << m_From->ToBase64 () << "\r\n";
+				}
+				
+				m_OutHeader << "\r\n"; // end of header
+				m_OutHeader << m_InHeader.str ().substr (m_InHeader.tellg ()); // data right after header
+				m_InHeader.str ("");
+				m_From = nullptr;
+				m_HeaderSent = true;
+				I2PTunnelConnection::Write ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ());
+			}
+		}
+	}
+
+	void I2PServerTunnelConnectionHTTP::WriteToStream (const uint8_t * buf, size_t len)
+	{
+		if (m_ResponseHeaderSent)
+			I2PTunnelConnection::WriteToStream (buf, len);
+		else
+		{
+			m_InHeader.clear ();
+			if (m_InHeader.str ().empty ()) m_OutHeader.str (""); // start of response
+			m_InHeader.write ((const char *)buf, len);
+			std::string line;
+			bool endOfHeader = false;
+			while (!endOfHeader)
+			{
+				std::getline(m_InHeader, line);
+				if (!m_InHeader.fail ())
+				{
+					if (line == "\r") endOfHeader = true;
+					else
+					{
+						static const std::vector<std::string> excluded // list of excluded headers
+						{
+							"Server:", "Date:", "X-Runtime:", "X-Powered-By:", "Proxy"
+						};
+						bool matched = false;
+						for (const auto& it: excluded)
+							if (!line.compare(0, it.length (), it)) 
+							{
+								matched = true;
+								break;	
+							}	
+						if (!matched)
+							m_OutHeader << line << "\n";
+					}
+				}
+				else
+					break;
 			}

 			if (endOfHeader)
@ -346,12 +401,15 @@ namespace client
 				m_OutHeader << "\r\n"; // end of header
 				m_OutHeader << m_InHeader.str ().substr (m_InHeader.tellg ()); // data right after header
 				m_InHeader.str ("");
-				m_HeaderSent = true;
-				I2PTunnelConnection::Write ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ());
-			}
-		}
+				m_ResponseHeaderSent = true;
+				I2PTunnelConnection::WriteToStream ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ());
+				m_OutHeader.str ("");
+			}	
+			else
+				Receive ();
+		}		
 	}
-
+		
 	I2PTunnelConnectionIRC::I2PTunnelConnectionIRC (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
 		std::shared_ptr<boost::asio::ip::tcp::socket> socket,
 		const boost::asio::ip::tcp::endpoint& target, const std::string& webircpass):
--- a/libi2pd_client/I2PTunnel.h
+++ b/libi2pd_client/I2PTunnel.h
@ -57,7 +57,8 @@ namespace client
 			void HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred);
 			virtual void Write (const uint8_t * buf, size_t len); // can be overloaded
 			void HandleWrite (const boost::system::error_code& ecode);
-
+			virtual void WriteToStream (const uint8_t * buf, size_t len); // can be overloaded
+		
 			void StreamReceive ();
 			void HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred);
 			void HandleConnect (const boost::system::error_code& ecode);
@ -103,12 +104,13 @@ namespace client
 		protected:

 			void Write (const uint8_t * buf, size_t len);
+			void WriteToStream (const uint8_t * buf, size_t len); 

 		private:

 			std::string m_Host;
 			std::stringstream m_InHeader, m_OutHeader;
-			bool m_HeaderSent;
+			bool m_HeaderSent, m_ResponseHeaderSent;
 			std::shared_ptr<const i2p::data::IdentityEx> m_From;
 	};

--- a/qt/i2pd_qt/i2pd_qt.pro
+++ b/qt/i2pd_qt/i2pd_qt.pro
@ -42,7 +42,6 @@ SOURCES += DaemonQT.cpp mainwindow.cpp \
    ../../libi2pd/NetDb.cpp \
    ../../libi2pd/NetDbRequests.cpp \
    ../../libi2pd/NTCP2.cpp \
-    ../../libi2pd/NTCPSession.cpp \
    ../../libi2pd/Poly1305.cpp \
    ../../libi2pd/Profiling.cpp \
    ../../libi2pd/Reseed.cpp \
@ -123,7 +122,6 @@ HEADERS  += DaemonQT.h mainwindow.h \
    ../../libi2pd/NetDb.hpp \
    ../../libi2pd/NetDbRequests.h \
    ../../libi2pd/NTCP2.h \
-    ../../libi2pd/NTCPSession.h \
    ../../libi2pd/Poly1305.h \
    ../../libi2pd/Profiling.h \
    ../../libi2pd/Queue.h \