2014 network limit 1.0a +utils +toc -doc -drmonero

commands and options for network limiting
works very well e.g. for 50 KiB/sec up and down
ToS (QoS) flag
peer number limit
TODO some spikes in ingress/download
TODO problems when other up and down limit
added "otshell utils" - simple logging (with colors, text files channels)

9 files changed, 1541 insertions, 47 deletions

diff --git a/src/p2p/CMakeLists.txt b/src/p2p/CMakeLists.txt
new file mode 100644
index 000000000..541b90fa9
--- /dev/null
+++ b/src/p2p/CMakeLists.txt
@@ -0,0 +1,46 @@
+# Copyright (c) 2014, The Monero Project
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+cmake_minimum_required (VERSION 2.6)
+project (bitmonero CXX)
+
+file(GLOB P2P *)
+source_group(p2p FILES ${P2P})
+
+#add_library(p2p ${P2P})
+
+#bitmonero_private_headers(p2p ${P2P})
+bitmonero_add_library(p2p ${P2P})
+#target_link_libraries(p2p)
+#  LINK_PRIVATE
+#    ${Boost_CHRONO_LIBRARY}
+#    ${Boost_REGEX_LIBRARY}
+#    ${Boost_SYSTEM_LIBRARY}
+#    ${Boost_THREAD_LIBRARY}
+#    ${EXTRA_LIBRARIES})
+add_dependencies(p2p
+  version)
diff --git a/src/p2p/connection_basic.cpp b/src/p2p/connection_basic.cpp
new file mode 100644
index 000000000..35b0d4c8e
--- /dev/null
+++ b/src/p2p/connection_basic.cpp
@@ -0,0 +1,362 @@
+/// @file
+/// @author rfree (current maintainer in monero.cc project)
+/// @brief base for connection, contains e.g. the ratelimit hooks
+
+// Copyright (c) 2014, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/* rfree: implementation for the non-template base, can be used by connection<> template class in abstract_tcp_server2 file  */
+
+#include "connection_basic.hpp"
+
+#include <boost/asio.hpp>
+#include <string>
+#include <vector>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <atomic>
+
+#include <boost/asio.hpp>
+#include <boost/array.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/interprocess/detail/atomic.hpp>
+#include <boost/thread/thread.hpp>
+
+#include <memory>
+
+#include "syncobj.h"
+
+#include "../../contrib/epee/include/net/net_utils_base.h" 
+#include "../../contrib/epee/include/misc_log_ex.h" 
+#include <boost/lambda/bind.hpp>
+#include <boost/foreach.hpp>
+#include <boost/lambda/lambda.hpp>
+#include <boost/uuid/random_generator.hpp>
+#include <boost/chrono.hpp>
+#include <boost/utility/value_init.hpp>
+#include <boost/asio/deadline_timer.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/filesystem.hpp>
+#include "misc_language.h"
+#include "pragma_comp_defs.h"
+#include <fstream>
+#include <sstream>
+#include <iomanip>
+#include <algorithm>
+#include <mutex>
+
+#include <boost/asio/basic_socket.hpp>
+#include <boost/asio/ip/unicast.hpp>
+#include "../../contrib/epee/include/net/abstract_tcp_server2.h"
+
+#include "../../contrib/otshell_utils/utils.hpp"
+using namespace nOT::nUtils;
+
+// TODO:
+#include "../../src/p2p/network_throttle-detail.hpp"
+#include "../../src/cryptonote_core/cryptonote_core.h"
+
+// ################################################################################################
+// local (TU local) headers
+// ################################################################################################
+
+namespace epee
+{
+namespace net_utils
+{
+
+
+/* ============================================================================ */
+
+class connection_basic_pimpl {
+	public:
+		connection_basic_pimpl(const std::string &name);
+
+		static int m_default_tos;
+
+		network_throttle_bw m_throttle; // per-perr
+    critical_section m_throttle_lock;
+
+		int m_peer_number; // e.g. for debug/stats
+};
+
+
+} // namespace
+} // namespace
+
+// ################################################################################################
+// The implementation part
+// ################################################################################################
+
+namespace epee
+{
+namespace net_utils
+{
+
+// ================================================================================================
+// connection_basic_pimpl
+// ================================================================================================
+	
+connection_basic_pimpl::connection_basic_pimpl(const std::string &name) : m_throttle(name) { }
+
+// ================================================================================================
+// connection_basic
+// ================================================================================================
+
+// static variables:
+int connection_basic_pimpl::m_default_tos;
+
+// methods:
+connection_basic::connection_basic(boost::asio::io_service& io_service, std::atomic<long> &ref_sock_count, std::atomic<long> &sock_number)
+	: 
+	mI( new connection_basic_pimpl("peer") ),
+	strand_(io_service),
+	socket_(io_service),
+	m_want_close_connection(false), 
+	m_was_shutdown(false),
+	m_ref_sock_count(ref_sock_count)
+{ 
+	++ref_sock_count; // increase the global counter
+	mI->m_peer_number = sock_number.fetch_add(1); // use, and increase the generated number
+	_note("Spawned connection p2p#"<<mI->m_peer_number<<" currently we have sockets count:" << m_ref_sock_count);
+	boost::filesystem::create_directories("log/dr-monero/net/");
+	/*boost::asio::SettableSocketOption option;// = new boost::asio::SettableSocketOption();
+	option.level(IPPROTO_IP);
+	option.name(IP_TOS);
+	option.value(&tos);
+	option.size = sizeof(tos);
+	socket_.set_option(option);*/
+	// TODO socket options
+}
+
+connection_basic::~connection_basic() {
+	_note("Destructing connection p2p#"<<mI->m_peer_number);
+}
+
+void connection_basic::set_rate_up_limit(uint64_t limit) {
+	save_limit_to_file(limit);
+	{
+		// TODO remove __SCALING_FACTOR...
+		const double SCALING_FACTOR = 2.25; // to acheve the best performance
+		limit *= SCALING_FACTOR;
+		CRITICAL_REGION_LOCAL(	network_throttle_manager::m_lock_get_global_throttle_out );
+		network_throttle_manager::get_global_throttle_out().set_target_speed(limit);
+	}
+	//	connection_basic_pimpl::m_throttle_global.m_out.set_target_speed(limit);
+}
+
+void connection_basic::set_rate_down_limit(uint64_t limit) {
+	{
+	  CRITICAL_REGION_LOCAL(	network_throttle_manager::m_lock_get_global_throttle_in );
+		network_throttle_manager::get_global_throttle_in().set_target_speed(limit);
+	}
+
+	{
+	  CRITICAL_REGION_LOCAL(	network_throttle_manager::m_lock_get_global_throttle_inreq );
+		network_throttle_manager::get_global_throttle_inreq().set_target_speed(limit);
+	}
+    save_limit_to_file(limit);
+}
+
+void connection_basic::set_rate_limit(uint64_t limit) {
+	// TODO
+}
+void connection_basic::set_kill_limit (uint64_t limit) {
+       {
+         CRITICAL_REGION_LOCAL(        network_throttle_manager::m_lock_get_global_throttle_in );
+               network_throttle_manager::get_global_throttle_in().set_target_kill(limit);
+       }
+
+       {
+         CRITICAL_REGION_LOCAL(        network_throttle_manager::m_lock_get_global_throttle_out );
+               network_throttle_manager::get_global_throttle_out().set_target_kill(limit);
+       }
+
+       {
+         CRITICAL_REGION_LOCAL(        network_throttle_manager::m_lock_get_global_throttle_inreq );
+               network_throttle_manager::get_global_throttle_inreq().set_target_kill(limit);
+       }
+}
+
+void connection_basic::save_limit_to_file(int limit) {
+    // saving limit to file
+    std::ofstream file;
+    file.open("log/dr-monero/limit.info");
+    file << limit;
+}
+
+void connection_basic::set_rate_autodetect(uint64_t limit) {
+	// TODO
+	LOG_PRINT_L0("inside connection_basic we set autodetect (this is additional notification)..");
+}
+ 
+void connection_basic::set_tos_flag(int tos) {
+	connection_basic_pimpl::m_default_tos = tos;
+}
+
+int connection_basic::get_tos_flag() {
+	return connection_basic_pimpl::m_default_tos;
+}
+
+void connection_basic::sleep_before_packet(size_t packet_size, int phase,  int q_len) {
+	double delay=0; // will be calculated
+	do
+	{ // rate limiting
+		//XXX 
+		/*if (::cryptonote::core::get_is_stopping()) { 
+			_dbg1("We are stopping - so abort sleep");
+			return;
+		}*/
+		if (m_was_shutdown) { 
+			_dbg2("m_was_shutdown - so abort sleep");
+			return;
+		}
+
+		{ 
+	  	CRITICAL_REGION_LOCAL(	network_throttle_manager::m_lock_get_global_throttle_out );
+			delay = network_throttle_manager::get_global_throttle_out().get_sleep_time_after_tick( packet_size ); // decission from global
+		}
+
+		
+		delay *= 0.50;
+		delay = 0; // XXX
+		if (delay > 0) {
+			//delay += rand2*0.1;
+            		long int ms = (long int)(delay * 1000);
+			_info_c("net/sleep", "Sleeping in " << __FUNCTION__ << " for " << ms << " ms before packet_size="<<packet_size); // XXX debug sleep
+			_dbg1("sleep in sleep_before_packet");
+			boost::this_thread::sleep(boost::posix_time::milliseconds( ms ) ); // TODO randomize sleeps
+		}
+	} while(delay > 0);
+
+// XXX LATER XXX
+	{
+	  CRITICAL_REGION_LOCAL(	network_throttle_manager::m_lock_get_global_throttle_out );
+		network_throttle_manager::get_global_throttle_out().handle_trafic_tcp( packet_size ); // increase counter - global
+		//epee::critical_region_t<decltype(m_throttle_global_lock)> guard(m_throttle_global_lock); // *** critical *** 
+		//m_throttle_global.m_out.handle_trafic_tcp( packet_size ); // increase counter - global
+	}
+
+}
+void connection_basic::set_start_time() {
+	CRITICAL_REGION_LOCAL(	network_throttle_manager::m_lock_get_global_throttle_out );
+	m_start_time = network_throttle_manager::get_global_throttle_out().get_time_seconds();
+}
+
+void connection_basic::do_send_handler_start(const void* ptr , size_t cb ) {
+	_fact_c("net/out/size", "*** do_sen() called for packet="<<cb<<" B");
+    sleep_before_packet(cb,1,-1);
+	// set_start_time();
+}
+
+void connection_basic::do_send_handler_delayed(const void* ptr , size_t cb ) {
+	// CRITICAL_REGION_LOCAL(network_throttle_manager::m_lock_get_global_throttle_out);
+	// auto sending_time = network_throttle_manager::get_global_throttle_out().get_time_seconds() - m_start_time; // wrong? --r
+}
+
+void connection_basic::do_send_handler_write(const void* ptr , size_t cb ) {
+	sleep_before_packet(cb,1,-1);
+	_info_c("net/out/size", "handler_write (direct) - before ASIO write, for packet="<<cb<<" B (after sleep)");
+	set_start_time();
+}
+
+void connection_basic::do_send_handler_stop(const void* ptr , size_t cb ) {
+}
+
+void connection_basic::do_send_handler_after_write(const boost::system::error_code& e, size_t cb) {
+	// CRITICAL_REGION_LOCAL(network_throttle_manager::m_lock_get_global_throttle_out);
+	// auto sending_time = network_throttle_manager::get_global_throttle_out().get_time_seconds() - m_start_time;
+	// lag: if current sending time > max sending time
+	//if (sending_time > 0.1) network_throttle_manager::get_global_throttle_out().set_overheat(sending_time); // TODO
+
+}
+
+void connection_basic::do_send_handler_write_from_queue( const boost::system::error_code& e, size_t cb, int q_len ) {
+	sleep_before_packet(cb,2,q_len);
+	_info_c("net/out/size", "handler_write (after write, from queue="<<q_len<<") - before ASIO write, for packet="<<cb<<" B (after sleep)");
+
+	set_start_time();
+}
+
+void connection_basic::do_read_handler_start(const boost::system::error_code& e, std::size_t bytes_transferred) { // from read, after read completion
+	const size_t packet_size = bytes_transferred;
+	{
+	  CRITICAL_REGION_LOCAL(	network_throttle_manager::m_lock_get_global_throttle_in );
+	 // sleep_before_packet(packet_size * __SCALING_FACTOR, 1, -1); // TODO remove __SCALING_FACTOR
+		network_throttle_manager::get_global_throttle_in().handle_trafic_tcp( packet_size ); // increase counter - global
+		// epee::critical_region_t<decltype(mI->m_throttle_global_lock)> guard(mI->m_throttle_global_lock); // *** critical *** 
+		// mI->m_throttle_global.m_in.handle_trafic_tcp( packet_size ); // increase counter - global	
+	}
+}
+
+void connection_basic::logger_handle_net_peer(size_t size, bool io) { // network data written
+        // TODO OPTIMIZE! do NOT reopen idiotically :)
+        std::ostringstream oss;
+    std::string filename;
+    if (io) { // write
+        double time = network_throttle_manager::get_global_throttle_in().get_time_seconds() ;
+        oss << "log/dr-monero/net/in-peer-" << (mI->m_peer_number) << ".dat" << std::ends;
+        filename = oss.str();
+        network_throttle_manager::get_global_throttle_out().logger_handle_net(filename,time,size);
+    }
+    else { // read
+        double time = network_throttle_manager::get_global_throttle_out().get_time_seconds() ;
+        oss << "log/dr-monero/net/out-peer-" << (mI->m_peer_number) << ".dat" << std::ends;
+        filename = oss.str();
+        network_throttle_manager::get_global_throttle_in().logger_handle_net(filename,time,size);
+    }
+}
+
+void connection_basic::logger_handle_net_read(size_t size) { // network data read
+    std::string filename = "log/dr-monero/net/in-all.data";
+
+    double time = network_throttle_manager::get_global_throttle_in().get_time_seconds() ;
+    network_throttle_manager::get_global_throttle_in().logger_handle_net(filename, time, size);
+    logger_handle_net_peer(size,0);
+}
+
+void connection_basic::logger_handle_net_write(size_t size) {
+    std::string filename = "log/dr-monero/net/out-all.data";
+    double time = network_throttle_manager::get_global_throttle_out().get_time_seconds() ;
+    network_throttle_manager::get_global_throttle_out().logger_handle_net(filename, time, size);
+    logger_handle_net_peer(size,1);
+
+}
+
+double connection_basic::get_sleep_time(size_t cb) {
+    auto t = network_throttle_manager::get_global_throttle_out().get_sleep_time(cb);
+    return t;
+}
+
+
+} // namespace
+} // namespace
+
diff --git a/src/p2p/connection_basic.hpp b/src/p2p/connection_basic.hpp
new file mode 100644
index 000000000..1b5a2c8ad
--- /dev/null
+++ b/src/p2p/connection_basic.hpp
@@ -0,0 +1,139 @@
+/// @file
+/// @author rfree (current maintainer in monero.cc project)
+/// @brief base for connection, contains e.g. the ratelimit hooks
+
+// ! This file might contain variable names same as in template class connection<> 
+// ! from files contrib/epee/include/net/abstract_tcp_server2.*
+// ! I am not a lawyer; afaik APIs, var names etc are not copyrightable ;)
+// ! (how ever if in some wonderful juristdictions that is not the case, then why not make another sub-class withat that members and licence it as epee part)
+// ! Working on above premise, IF this is valid in your juristdictions, then consider this code as released as:
+
+// Copyright (c) 2014, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+
+/* rfree: place for hanlers for the non-template base, can be used by connection<> template class in abstract_tcp_server2 file  */
+
+#ifndef INCLUDED_p2p_connection_basic_hpp
+#define INCLUDED_p2p_connection_basic_hpp
+
+
+#include <boost/asio.hpp>
+#include <string>
+#include <vector>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <atomic>
+
+#include <boost/asio.hpp>
+#include <boost/array.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/interprocess/detail/atomic.hpp>
+#include <boost/thread/thread.hpp>
+
+#include <memory>
+
+#include "../../contrib/epee/include/net/net_utils_base.h"
+#include "../../contrib/epee/include/syncobj.h"
+
+namespace epee
+{
+namespace net_utils
+{
+
+  /************************************************************************/
+  /*                                                                      */
+  /************************************************************************/
+  /// Represents a single connection from a client.
+
+class connection_basic_pimpl; // PIMPL for this class
+
+class connection_basic { // not-templated base class for rapid developmet of some code parts
+	public:
+		std::unique_ptr< connection_basic_pimpl > mI; // my Implementation
+
+		// moved here from orginal connecton<> - common member variables that do not depend on template in connection<>
+    volatile uint32_t m_want_close_connection;
+    std::atomic<bool> m_was_shutdown;
+    critical_section m_send_que_lock;
+    std::list<std::string> m_send_que;
+    volatile bool m_is_multithreaded;
+    double m_start_time;
+    /// Strand to ensure the connection's handlers are not called concurrently.
+    boost::asio::io_service::strand strand_;
+    /// Socket for the connection.
+    boost::asio::ip::tcp::socket socket_;
+
+		std::atomic<long> &m_ref_sock_count; // reference to external counter of existing sockets that we will ++/--
+	public:
+		// first counter is the ++/-- count of current sockets, the other socket_number is only-increasing ++ number generator
+		connection_basic(boost::asio::io_service& io_service, std::atomic<long> &ref_sock_count, std::atomic<long> &sock_number);
+
+		virtual ~connection_basic();
+
+		// various handlers to be called from connection class:
+		void do_send_handler_start(const void * ptr , size_t cb);
+		void do_send_handler_delayed(const void * ptr , size_t cb);
+		void do_send_handler_write(const void * ptr , size_t cb);
+		void do_send_handler_stop(const void * ptr , size_t cb);
+		void do_send_handler_after_write( const boost::system::error_code& e, size_t cb ); // from handle_write
+		void do_send_handler_write_from_queue(const boost::system::error_code& e, size_t cb , int q_len); // from handle_write, sending next part
+		void do_read_handler_start(const boost::system::error_code& e, std::size_t bytes_transferred); // from read, after read completion
+
+		void logger_handle_net_write(size_t size); // network data written
+		void logger_handle_net_read(size_t size); // network data read
+		void logger_handle_net_peer(size_t size, bool io);
+
+		void set_start_time();
+
+		// config for rate limit
+		
+		static void set_rate_up_limit(uint64_t limit);
+		static void set_rate_down_limit(uint64_t limit);
+		static void set_rate_limit(uint64_t limit);
+		static void set_rate_autodetect(uint64_t limit);
+		static void set_kill_limit (uint64_t limit);
+
+		// config misc
+		static void set_tos_flag(int tos); // ToS / QoS flag
+		static int get_tos_flag();
+
+		// handlers and sleep
+		void sleep_before_packet(size_t packet_size, int phase, int q_len); // execute a sleep ; phase is not really used now(?)
+		static void save_limit_to_file(int limit); ///< for dr-monero
+		static double get_sleep_time(size_t cb);
+};
+
+} // nameserver
+} // nameserver
+
+#endif
+
+
diff --git a/src/p2p/net_node.h b/src/p2p/net_node.h
index 97fcd56c8..48737193e 100644
--- a/src/p2p/net_node.h
+++ b/src/p2p/net_node.h
@@ -80,14 +80,12 @@ namespace nodetool
   public:
     typedef t_payload_net_handler payload_net_handler;
 
-    node_server(
-        t_payload_net_handler& payload_handler
-      , boost::uuids::uuid network_id
-      )
-      : m_payload_handler(payload_handler)
-      , m_allow_local_ip(false)
-      , m_hide_my_port(false)
-      , m_network_id(std::move(network_id))
+    node_server(t_payload_net_handler& payload_handler, boost::uuids::uuid network_id)
+		:m_payload_handler(payload_handler),
+		m_allow_local_ip(false),
+		m_no_igd(false),
+		m_hide_my_port(false),
+		m_network_id(std::move(network_id))
     {}
 
     static void init_options(boost::program_options::options_description& desc);
@@ -111,6 +109,7 @@ namespace nodetool
     virtual uint64_t get_connections_count();
     size_t get_outgoing_connections_count();
     peerlist_manager& get_peerlist_manager(){return m_peerlist;}
+    void delete_connections(size_t count);
   private:
     const std::vector<std::string> m_seed_nodes_list =
     { "seeds.moneroseeds.se"
@@ -118,6 +117,9 @@ namespace nodetool
     , "seeds.moneroseeds.ch"
     , "seeds.moneroseeds.li"
     };
+    
+    bool islimitup=false;
+    bool islimitdown=false;
 
     typedef COMMAND_REQUEST_STAT_INFO_T<typename t_payload_net_handler::stat_info> COMMAND_REQUEST_STAT_INFO;
 
@@ -197,6 +199,13 @@ namespace nodetool
     template <class Container>
     bool parse_peers_and_add_to_container(const boost::program_options::variables_map& vm, const command_line::arg_descriptor<std::vector<std::string> > & arg, Container& container);
 
+	bool set_max_out_peers(const boost::program_options::variables_map& vm, int64_t max);
+	bool set_tos_flag(const boost::program_options::variables_map& vm, int limit);
+	
+	bool set_rate_up_limit(const boost::program_options::variables_map& vm, int64_t limit);
+  	bool set_rate_down_limit(const boost::program_options::variables_map& vm, int64_t limit);
+  	bool set_rate_limit(const boost::program_options::variables_map& vm, uint64_t limit);
+
     //debug functions
     std::string print_connections_container();
 
@@ -214,7 +223,10 @@ namespace nodetool
       END_KV_SERIALIZE_MAP()
     };
 
-    config m_config;
+	public:
+    config m_config; // TODO was private, add getters?
+
+	private:
     std::string m_config_folder;
 
     bool m_have_address;
@@ -224,6 +236,7 @@ namespace nodetool
     uint32_t m_ip_address;
     bool m_allow_local_ip;
     bool m_hide_my_port;
+    bool m_no_igd;
 
     //critical_section m_connections_lock;
     //connections_indexed_container m_connections;
diff --git a/src/p2p/net_node.inl b/src/p2p/net_node.inl
index ee4a10789..ce70e241a 100644
--- a/src/p2p/net_node.inl
+++ b/src/p2p/net_node.inl
@@ -84,6 +84,14 @@ namespace nodetool
                                                                                                   " If this option is given the options add-priority-node and seed-node are ignored"};
     const command_line::arg_descriptor<std::vector<std::string> > arg_p2p_seed_node   = {"seed-node", "Connect to a node to retrieve peer addresses, and disconnect"};
     const command_line::arg_descriptor<bool> arg_p2p_hide_my_port   =    {"hide-my-port", "Do not announce yourself as peerlist candidate", false, true};
+    
+    const command_line::arg_descriptor<bool>        arg_no_igd = {"no-igd", "Disable UPnP port mapping"};
+    const command_line::arg_descriptor<int64_t>     arg_out_peers = {"out-peers", "set max limit of out peers", -1};
+    const command_line::arg_descriptor<int>    		arg_tos_flag      		= {"tos-flag", "set TOS flag", -1};
+    
+    const command_line::arg_descriptor<int64_t>    	arg_limit_rate_up      	= {"limit-rate-up", "set limit-rate-up [kB/s]", -1};
+    const command_line::arg_descriptor<int64_t>    	arg_limit_rate_down     = {"limit-rate-down", "set limit-rate-down [kB/s]", -1};
+    const command_line::arg_descriptor<uint64_t>    arg_limit_rate      	= {"limit-rate", "set limit-rate [kB/s]", 128};
   }
 
   //-----------------------------------------------------------------------------------
@@ -99,7 +107,13 @@ namespace nodetool
     command_line::add_arg(desc, arg_p2p_add_priority_node);
     command_line::add_arg(desc, arg_p2p_add_exclusive_node);
     command_line::add_arg(desc, arg_p2p_seed_node);    
-    command_line::add_arg(desc, arg_p2p_hide_my_port);   }
+    command_line::add_arg(desc, arg_p2p_hide_my_port);
+    command_line::add_arg(desc, arg_no_igd);
+    command_line::add_arg(desc, arg_out_peers);
+    command_line::add_arg(desc, arg_tos_flag);
+    command_line::add_arg(desc, arg_limit_rate_up);
+  	command_line::add_arg(desc, arg_limit_rate_down);
+  	command_line::add_arg(desc, arg_limit_rate);   }
   //-----------------------------------------------------------------------------------
   template<class t_payload_net_handler>
   bool node_server<t_payload_net_handler>::init_config()
@@ -120,7 +134,6 @@ namespace nodetool
 
     //at this moment we have hardcoded config
     m_config.m_net_config.handshake_interval = P2P_DEFAULT_HANDSHAKE_INTERVAL;
-    m_config.m_net_config.connections_count = P2P_DEFAULT_CONNECTIONS_COUNT;
     m_config.m_net_config.packet_max_size = P2P_DEFAULT_PACKET_MAX_SIZE; //20 MB limit
     m_config.m_net_config.config_id = 0; // initial config
     m_config.m_net_config.connection_timeout = P2P_DEFAULT_CONNECTION_TIMEOUT;
@@ -165,6 +178,7 @@ namespace nodetool
     m_port = command_line::get_arg(vm, p2p_bind_arg);
     m_external_port = command_line::get_arg(vm, arg_p2p_external_port);
     m_allow_local_ip = command_line::get_arg(vm, arg_p2p_allow_local_ip);
+    m_no_igd = command_line::get_arg(vm, arg_no_igd);
 
     if (command_line::has_arg(vm, arg_p2p_add_peer))
     {       
@@ -184,11 +198,13 @@ namespace nodetool
       if (!parse_peers_and_add_to_container(vm, arg_p2p_add_exclusive_node, m_exclusive_peers))
         return false;
     }
+    
     if (command_line::has_arg(vm, arg_p2p_add_priority_node))
     {
       if (!parse_peers_and_add_to_container(vm, arg_p2p_add_priority_node, m_priority_peers))
         return false;
     }
+    
     if (command_line::has_arg(vm, arg_p2p_seed_node))
     {
       if (!parse_peers_and_add_to_container(vm, arg_p2p_seed_node, m_seed_nodes))
@@ -197,6 +213,21 @@ namespace nodetool
 
     if(command_line::has_arg(vm, arg_p2p_hide_my_port))
       m_hide_my_port = true;
+      
+    if ( !set_max_out_peers(vm, command_line::get_arg(vm, arg_out_peers) ) )
+		return false;
+		
+	if ( !set_tos_flag(vm, command_line::get_arg(vm, arg_tos_flag) ) )
+		return false;
+
+	if ( !set_rate_up_limit(vm, command_line::get_arg(vm, arg_limit_rate_up) ) )
+		return false;
+
+	if ( !set_rate_down_limit(vm, command_line::get_arg(vm, arg_limit_rate_down) ) )
+		return false;
+
+	if ( !set_rate_limit(vm, command_line::get_arg(vm, arg_limit_rate) ) )
+		return false; 
 
     return true;
   }
@@ -375,42 +406,43 @@ namespace nodetool
       LOG_PRINT_L0("External port defined as " << m_external_port);
 
     // Add UPnP port mapping
-    LOG_PRINT_L0("Attempting to add IGD port mapping.");
-    int result;
-    UPNPDev* deviceList = upnpDiscover(1000, NULL, NULL, 0, 0, &result);
-    UPNPUrls urls;
-    IGDdatas igdData;
-    char lanAddress[64];
-    result = UPNP_GetValidIGD(deviceList, &urls, &igdData, lanAddress, sizeof lanAddress);
-    freeUPNPDevlist(deviceList);
-    if (result != 0) {
-      if (result == 1) {
-        std::ostringstream portString;
-        portString << m_listenning_port;
-        
-        // Delete the port mapping before we create it, just in case we have dangling port mapping from the daemon not being shut down correctly
-        UPNP_DeletePortMapping(urls.controlURL, igdData.first.servicetype, portString.str().c_str(), "TCP", 0);
-
-        int portMappingResult;
-        portMappingResult = UPNP_AddPortMapping(urls.controlURL, igdData.first.servicetype, portString.str().c_str(), portString.str().c_str(), lanAddress, CRYPTONOTE_NAME, "TCP", 0, "0");
-        if (portMappingResult != 0) {
-          LOG_ERROR("UPNP_AddPortMapping failed, error: " << strupnperror(portMappingResult));
-        } else {
-          LOG_PRINT_GREEN("Added IGD port mapping.", LOG_LEVEL_0);
-        }
-      } else if (result == 2) {
-        LOG_PRINT_L0("IGD was found but reported as not connected.");
-      } else if (result == 3) {
-        LOG_PRINT_L0("UPnP device was found but not recoginzed as IGD.");
-      } else {
-        LOG_ERROR("UPNP_GetValidIGD returned an unknown result code.");
-      }
-
-      FreeUPNPUrls(&urls);
-    } else {
-      LOG_PRINT_L0("No IGD was found.");
-    }
-
+    if(m_no_igd == false) {
+		LOG_PRINT_L0("Attempting to add IGD port mapping.");
+		int result;
+		UPNPDev* deviceList = upnpDiscover(1000, NULL, NULL, 0, 0, &result);
+		UPNPUrls urls;
+		IGDdatas igdData;
+		char lanAddress[64];
+		result = UPNP_GetValidIGD(deviceList, &urls, &igdData, lanAddress, sizeof lanAddress);
+		freeUPNPDevlist(deviceList);
+		if (result != 0) {
+		  if (result == 1) {
+			std::ostringstream portString;
+			portString << m_listenning_port;
+			
+			// Delete the port mapping before we create it, just in case we have dangling port mapping from the daemon not being shut down correctly
+			UPNP_DeletePortMapping(urls.controlURL, igdData.first.servicetype, portString.str().c_str(), "TCP", 0);
+
+			int portMappingResult;
+			portMappingResult = UPNP_AddPortMapping(urls.controlURL, igdData.first.servicetype, portString.str().c_str(), portString.str().c_str(), lanAddress, CRYPTONOTE_NAME, "TCP", 0, "0");
+			if (portMappingResult != 0) {
+			  LOG_ERROR("UPNP_AddPortMapping failed, error: " << strupnperror(portMappingResult));
+			} else {
+			  LOG_PRINT_GREEN("Added IGD port mapping.", LOG_LEVEL_0);
+			}
+		  } else if (result == 2) {
+			LOG_PRINT_L0("IGD was found but reported as not connected.");
+		  } else if (result == 3) {
+			LOG_PRINT_L0("UPnP device was found but not recoginzed as IGD.");
+		  } else {
+			LOG_ERROR("UPNP_GetValidIGD returned an unknown result code.");
+		  }
+
+		  FreeUPNPUrls(&urls);
+		} else {
+		  LOG_PRINT_L0("No IGD was found.");
+		}
+	}
     return res;
   }
   //-----------------------------------------------------------------------------------
@@ -1300,4 +1332,83 @@ namespace nodetool
 
     return true;
   }
+  
+  template<class t_payload_net_handler>
+  bool node_server<t_payload_net_handler>::set_max_out_peers(const boost::program_options::variables_map& vm, int64_t max)
+	{
+		if(max == -1) {
+			m_config.m_net_config.connections_count = P2P_DEFAULT_CONNECTIONS_COUNT;
+			return true;
+		}
+		
+		m_config.m_net_config.connections_count = max;
+		LOG_PRINT_RED_L0("connections_count:  " << m_config.m_net_config.connections_count);
+		return true;
+	}
+	
+  template<class t_payload_net_handler>
+  void node_server<t_payload_net_handler>::delete_connections(size_t count)
+  {
+		m_net_server.get_config_object().del_connections(count);
+  }
+  
+  	  template<class t_payload_net_handler>
+  bool node_server<t_payload_net_handler>::set_tos_flag(const boost::program_options::variables_map& vm, int flag)
+	{
+		if(flag==-1){
+			return true;
+		}
+		epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_tos_flag(flag);
+		_dbg1("Set ToS flag  " << flag);
+		return true;
+	}
+	
+	  template<class t_payload_net_handler>
+	bool node_server<t_payload_net_handler>::set_rate_up_limit(const boost::program_options::variables_map& vm, int64_t limit)
+	{
+		this->islimitup=true;
+
+		if (limit==-1) {
+			limit=128;
+			this->islimitup=false;
+		}
+		
+		limit *= 1024;
+		epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_up_limit( limit );
+		LOG_PRINT_L0("Set limit-up to " << limit/1024 << " kB/s");
+		return true;
+	}
+	
+  template<class t_payload_net_handler>
+	bool node_server<t_payload_net_handler>::set_rate_down_limit(const boost::program_options::variables_map& vm, int64_t limit)
+	{
+		this->islimitdown=true;
+		if(limit==-1) {
+			limit=128;
+			this->islimitdown=false;
+		}
+		limit *= 1024;
+		epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_down_limit( limit );
+		LOG_PRINT_L0("Set limit-down to " << limit/1024 << " kB/s");
+		return true;
+	}
+
+  template<class t_payload_net_handler>
+	bool node_server<t_payload_net_handler>::set_rate_limit(const boost::program_options::variables_map& vm, uint64_t limit)
+	{
+		limit *= 1024;
+		if(this->islimitdown==false && this->islimitup==false) {
+			epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_up_limit( limit );
+			epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_down_limit( limit );
+			LOG_PRINT_L0("Set limit to " << limit/1024 << " kB/s");
+		}
+		else if(this->islimitdown==false && this->islimitup==true ) {
+			epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_down_limit( limit );
+		}
+		else if(this->islimitdown==true && this->islimitup==false ) {
+			epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_up_limit( limit );
+        }
+
+		return true;
+	}
 }
diff --git a/src/p2p/network_throttle-detail.cpp b/src/p2p/network_throttle-detail.cpp
new file mode 100644
index 000000000..6ea3076a9
--- /dev/null
+++ b/src/p2p/network_throttle-detail.cpp
@@ -0,0 +1,382 @@
+/// @file
+/// @author rfree (current maintainer in monero.cc project)
+/// @brief implementaion for throttling of connection (count and rate-limit speed etc)
+
+// Copyright (c) 2014, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/* rfree: implementation for throttle details */
+
+#include <boost/asio.hpp>
+#include <string>
+#include <vector>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <atomic>
+
+#include <boost/asio.hpp>
+#include <boost/array.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/interprocess/detail/atomic.hpp>
+#include <boost/thread/thread.hpp>
+
+#include <memory>
+
+#include "syncobj.h"
+
+#include "../../contrib/epee/include/net/net_utils_base.h" 
+#include "../../contrib/epee/include/misc_log_ex.h" 
+#include <boost/lambda/bind.hpp>
+#include <boost/foreach.hpp>
+#include <boost/lambda/lambda.hpp>
+#include <boost/uuid/random_generator.hpp>
+#include <boost/chrono.hpp>
+#include <boost/utility/value_init.hpp>
+#include <boost/asio/deadline_timer.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <boost/thread/thread.hpp> 
+#include "misc_language.h"
+#include "pragma_comp_defs.h"
+#include <sstream>
+#include <iomanip>
+#include <algorithm>
+
+
+
+#include <boost/asio/basic_socket.hpp>
+#include <boost/asio/ip/unicast.hpp>
+#include "../../contrib/epee/include/net/abstract_tcp_server2.h"
+
+// TODO:
+#include "../../src/p2p/network_throttle-detail.hpp"
+
+#include "../../contrib/otshell_utils/utils.hpp"
+using namespace nOT::nUtils;
+
+// ################################################################################################
+// ################################################################################################
+// the "header part". Not separeted out for .hpp because point of this modification is 
+// to rebuild just 1 translation unit while working on this code.
+// (But maybe common parts will be separated out later though - if needed)
+// ################################################################################################
+// ################################################################################################
+
+using namespace nOT::nUtils;
+
+namespace epee
+{
+namespace net_utils
+{
+
+
+/* ============================================================================ */
+
+class connection_basic_pimpl {
+	public:
+		connection_basic_pimpl(const std::string &name);
+
+		static int m_default_tos;
+
+		network_throttle_bw m_throttle; // per-perr
+    critical_section m_throttle_lock;
+
+		void _packet(size_t packet_size, int phase, int q_len); // execute a sleep ; phase is not really used now(?) could be used for different kinds of sleep e.g. direct/queue write
+};
+
+
+} // namespace
+} // namespace
+
+
+
+
+
+
+// ################################################################################################
+// ################################################################################################
+// The implementation part
+// ################################################################################################
+// ################################################################################################
+
+namespace epee
+{
+namespace net_utils
+{
+
+// ================================================================================================
+// network_throttle
+// ================================================================================================
+
+network_throttle::~network_throttle() { }
+
+network_throttle::packet_info::packet_info() 
+	: m_size(0)
+{ 
+}
+
+network_throttle::network_throttle(const std::string &nameshort, const std::string &name, int window_size)
+    : m_window_size( (window_size==-1) ? 10 : window_size  ),
+	  m_history( m_window_size ), m_nameshort(nameshort)
+{
+	set_name(name);
+	m_network_add_cost = 128;
+	m_network_minimal_segment = 256;
+	m_network_max_segment = 1024*1024;
+	m_any_packet_yet = false;
+	m_slot_size = 1.0; // hard coded in few places
+	m_target_speed = 16 * 1024; // other defaults are probably defined in the command-line parsing code when this class is used e.g. as main global throttle
+	m_target_MB = 0;
+
+}
+
+void network_throttle::set_name(const std::string &name) 
+{
+	m_name = name;
+}
+
+void network_throttle::set_target_speed( network_speed_kbps target ) 
+{
+    m_target_speed = target;
+	_note_c("net/"+m_nameshort, "Setting LIMIT: " << target << " kbps");
+}
+
+void network_throttle::set_target_kill( network_MB target )
+{
+	_note_c("net/"+m_nameshort, "Setting KILL: " << target << " MB hard limit");
+	m_target_MB = target;
+}
+
+			
+void network_throttle::tick()
+{
+	double time_now = get_time_seconds();
+	if (!m_any_packet_yet) m_start_time = time_now; // starting now
+
+	network_time_seconds current_sample_time_slot = time_to_slot( time_now ); // T=13.7 --> 13  (for 1-second smallwindow)
+	network_time_seconds last_sample_time_slot = time_to_slot( m_last_sample_time );
+
+	// moving to next position, and filling gaps
+	// !! during this loop the m_last_sample_time and last_sample_time_slot mean the variable moved in +1
+	// TODO optimize when moving few slots at once
+	while ( (!m_any_packet_yet) || (last_sample_time_slot < current_sample_time_slot))
+	{
+		LOG_PRINT_L4("Moving counter buffer by 1 second " << last_sample_time_slot << " < " << current_sample_time_slot << " (last time " << m_last_sample_time<<")");
+		// rotate buffer 
+		for (size_t i=m_history.size()-1; i>=1; --i) m_history[i] = m_history[i-1];
+		m_history[0] = packet_info();
+		if (! m_any_packet_yet) 
+		{
+			m_last_sample_time = time_now;	
+		}
+		m_last_sample_time += 1;	last_sample_time_slot = time_to_slot( m_last_sample_time ); // increase and recalculate time, time slot
+		m_any_packet_yet=true;
+	}
+	m_last_sample_time = time_now; // the real exact last time
+}
+
+void network_throttle::handle_trafic_exact(size_t packet_size) 
+{
+	_handle_trafic_exact(packet_size, packet_size);
+}
+
+void network_throttle::_handle_trafic_exact(size_t packet_size, size_t orginal_size)
+{
+	tick();
+
+	calculate_times_struct cts ;  calculate_times(packet_size, cts , false, -1);
+	calculate_times_struct cts2;  calculate_times(packet_size, cts2, false, 5);
+	m_history[0].m_size += packet_size;
+
+	std::ostringstream oss; oss << "["; 	for (auto sample: m_history) oss << sample.m_size << " ";	 oss << "]" << std::ends;
+	std::string history_str = oss.str();
+
+    logger_handle_net("log/dr-monero/net/inreq-all.data",get_time_seconds(),packet_size);
+	_info_c( "net/" + m_nameshort , "Throttle " << m_name << ": packet of ~"<<packet_size<<"b " << " (from "<<orginal_size<<" b)" 
+        << " Speed AVG=" << std::setw(4) <<  ((long int)(cts .average/1024)) <<"[w="<<cts .window<<"]"
+        <<           " " << std::setw(4) <<  ((long int)(cts2.average/1024)) <<"[w="<<cts2.window<<"]"
+				<<" / " << " Limit="<< ((long int)(m_target_speed/1024)) <<" KiB/sec "
+				<< " " << history_str
+		);
+}
+
+void network_throttle::handle_trafic_tcp(size_t packet_size)
+{
+	size_t all_size = packet_size + m_network_add_cost;
+	all_size = std::max( m_network_minimal_segment , all_size);
+	_handle_trafic_exact( all_size , packet_size );
+}
+
+void network_throttle::handle_congestion(double overheat) {
+	// TODO
+}
+
+network_time_seconds network_throttle::get_sleep_time_after_tick(size_t packet_size) {
+	tick();
+	return get_sleep_time(packet_size);
+}
+
+void network_throttle::logger_handle_net(const std::string &filename, double time, size_t size) {
+    std::mutex mutex;
+    mutex.lock(); {
+        std::fstream file;
+        file.open(filename.c_str(), std::ios::app | std::ios::out );
+        if(!file.is_open())
+            _warn("Can't open file " << filename);
+        file << time << " " << size/1024 << "\n";
+        file.close();
+    }  mutex.unlock();
+}
+
+// fine tune this to decide about sending speed:
+network_time_seconds network_throttle::get_sleep_time(size_t packet_size) const 
+{
+	//_scope_mark("");
+	double D2=0;
+	calculate_times_struct cts = { 0, 0, 0, 0};
+	//calculate_times(packet_size, cts, false, m_window_size/2); D2=cts.delay;
+	//calculate_times(packet_size, cts, true, m_window_size/2); D2=cts.delay;
+	calculate_times(packet_size, cts, true, m_window_size); D2=cts.delay;
+	return D2;
+}
+double network_throttle::get_current_overheat() const {
+ 	auto now = get_time_seconds();
+ 	auto diff = now - m_overheat_time;
+ 	auto overheat = m_overheat - diff;
+ 	overheat = std::max(m_overheat, 0.);
+ 	return overheat;
+}
+
+void network_throttle::set_overheat(double lag) {
+  	m_overheat += lag;
+  	m_overheat_time = get_time_seconds();
+  	LOG_PRINT_L0("Lag: " << lag << ", overheat: " << m_overheat );
+}
+
+// MAIN LOGIC:
+void network_throttle::calculate_times(size_t packet_size, calculate_times_struct &cts, bool dbg, double force_window) const 
+{
+    const double the_window_size = std::max( (double)m_window_size ,
+		((force_window>0) ? force_window : m_window_size) 
+	);
+
+	if (!m_any_packet_yet) {
+		cts.window=0; cts.average=0; cts.delay=0; 
+		cts.recomendetDataSize = m_network_minimal_segment; // should be overrided by caller anyway
+		return ; // no packet yet, I can not decide about sleep time
+	}
+
+	network_time_seconds window_len = (the_window_size-1) * m_slot_size ; // -1 since current slot is not finished
+	window_len += (m_last_sample_time - time_to_slot(m_last_sample_time));  // add the time for current slot e.g. 13.7-13 = 0.7
+
+	auto time_passed = get_time_seconds() - m_start_time;
+	cts.window = std::max( std::min( window_len , time_passed ) , m_slot_size )  ; // window length resulting from size of history but limited by how long ago history was started,
+	// also at least slot size (e.g. 1 second) to not be ridiculous
+	// window_len e.g. 5.7 because takes into account current slot time
+
+	size_t Epast = 0; // summ of traffic till now
+	for (auto sample : m_history) Epast += sample.m_size; 
+
+	const size_t E = Epast;
+	const size_t Enow = Epast + packet_size ; // including the data we're about to send now
+
+	const double M = m_target_speed; // max
+	const double D1 = (Epast - M*cts.window) / M; // delay - how long to sleep to get back to target speed
+	const double D2 = (Enow  - M*cts.window) / M; // delay - how long to sleep to get back to target speed (including current packet)
+
+	auto O = get_current_overheat();
+	auto Ouse = O * 0 ; // XXX TODO
+    cts.delay = (D1*0.80 + D2*0.20) + Ouse; // finall sleep depends on both with/without current packet
+	//				update_overheat();
+	cts.average = Epast/cts.window; // current avg. speed (for info)
+
+	if (Epast <= 0) {
+		if (cts.delay>=0) cts.delay = 0; // no traffic in history so we will not wait
+	}
+
+    double Wgood=-1;
+    {	// how much data we recommend now to download
+        Wgood = the_window_size + 1;
+        cts.recomendetDataSize = M*cts.window - E;
+    }
+
+	if (dbg) {
+		std::ostringstream oss; oss << "["; 	for (auto sample: m_history) oss << sample.m_size << " ";	 oss << "]" << std::ends;
+		std::string history_str = oss.str();
+		_dbg1_c( "net/"+m_nameshort+"_c" ,
+			"dbg " << m_name << ": " 
+			<< "speed is A=" << std::setw(8) <<cts.average<<" vs "
+			<< "Max=" << std::setw(8) <<M<<" "
+			<< " so sleep: "
+			<< "D=" << std::setw(8) <<cts.delay<<" sec "
+			<< "Overheat=" << std::setw(8) <<O<<" sec "
+			<< "E="<< std::setw(8) << E << " (Enow="<<std::setw(8)<<Enow<<") "
+            << "M=" << std::setw(8) << M <<" W="<< std::setw(8) << cts.window << " "
+            << "R=" << std::setw(8) << cts.recomendetDataSize << " Wgood" << std::setw(8) << Wgood << " "
+			<< "History: " << std::setw(8) << history_str << " "
+			<< "m_last_sample_time=" << std::setw(8) << m_last_sample_time
+		);
+
+	}
+}
+
+double network_throttle::get_time_seconds() const {
+	using namespace boost::chrono;
+	auto point = steady_clock::now();
+	auto time_from_epoh = point.time_since_epoch();
+	auto ms = duration_cast< milliseconds >( time_from_epoh ).count();
+	double ms_f = ms;
+	return ms_f / 1000.;
+}
+
+size_t network_throttle::get_recommended_size_of_planned_transport_window(double force_window) const {
+	calculate_times_struct cts = { 0, 0, 0, 0};
+	network_throttle::calculate_times(0, cts, true, force_window);
+	cts.recomendetDataSize += m_network_add_cost;
+	if (cts.recomendetDataSize<0) cts.recomendetDataSize=0;
+	if (cts.recomendetDataSize>m_network_max_segment) cts.recomendetDataSize=m_network_max_segment;
+	size_t RI = (long int)cts.recomendetDataSize;
+	return RI;
+}
+
+size_t network_throttle::get_recommended_size_of_planned_transport() const {
+	size_t R1=0,R2=0,R3=0;
+	R1 = get_recommended_size_of_planned_transport_window( -1 );
+	R2 = get_recommended_size_of_planned_transport_window( m_window_size/2);
+	R3 = get_recommended_size_of_planned_transport_window( 8              );
+	auto RM = std::min(R1, std::min(R2,R3));
+
+	const double a1=70, a2=10, a3=10, am=10; // weight of the various windows in decisssion
+	return (R1*a1 + R2*a2 + R3*a3 + RM*am) / (a1+a2+a3+am);
+}
+
+
+} // namespace
+} // namespace
+
diff --git a/src/p2p/network_throttle-detail.hpp b/src/p2p/network_throttle-detail.hpp
new file mode 100644
index 000000000..9d492c534
--- /dev/null
+++ b/src/p2p/network_throttle-detail.hpp
@@ -0,0 +1,133 @@
+/// @file
+/// @author rfree (current maintainer in monero.cc project)
+/// @brief implementaion for throttling of connection (count and rate-limit speed etc)
+
+// Copyright (c) 2014, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+
+/* rfree: throttle details, implementing rate limiting */
+
+
+#ifndef INCLUDED_src_p2p_throttle_detail_hpp
+#define INCLUDED_src_p2p_throttle_detail_hpp
+
+#include "../../src/p2p/network_throttle.hpp"
+
+namespace epee
+{
+namespace net_utils
+{
+
+
+class network_throttle : public i_network_throttle {
+	private:
+		struct packet_info {
+			size_t m_size; // octets sent. Summary for given small-window (e.g. for all packaged in 1 second)
+			packet_info();
+		};
+
+
+		network_speed_kbps m_target_speed;
+		network_MB m_target_MB;
+		size_t m_network_add_cost; // estimated add cost of headers 
+		size_t m_network_minimal_segment; // estimated minimal cost of sending 1 byte to round up to
+		size_t m_network_max_segment; // recommended max size of 1 TCP transmission
+
+		const size_t m_window_size; // the number of samples to average over
+		network_time_seconds m_slot_size; // the size of one slot. TODO: now hardcoded for 1 second e.g. in time_to_slot()
+		// TODO for big window size, for performance better the substract on change of m_last_sample_time instead of recalculating average of eg >100 elements
+
+		std::vector< packet_info > m_history; // the history of bw usage
+		network_time_seconds m_last_sample_time; // time of last history[0] - so we know when to rotate the buffer
+		network_time_seconds m_start_time; // when we were created
+		bool m_any_packet_yet; // did we yet got any packet to count
+
+		double m_overheat; // last overheat
+		double m_overheat_time; // time in seconds after epoch
+
+		std::string m_name; // my name for debug and logs
+		std::string m_nameshort; // my name for debug and logs (used in log file name)
+
+	// each sample is now 1 second
+	public:
+		network_throttle(const std::string &nameshort, const std::string &name, int window_size=-1);
+		virtual ~network_throttle();
+		virtual void set_name(const std::string &name);
+		virtual void set_target_speed( network_speed_kbps target );
+		virtual void set_target_kill( network_MB target );
+
+		// add information about events:
+		virtual void handle_trafic_exact(size_t packet_size); ///< count the new traffic/packet; the size is exact considering all network costs
+		virtual void handle_trafic_tcp(size_t packet_size); ///< count the new traffic/packet; the size is as TCP, we will consider MTU etc
+		virtual void handle_congestion(double overheat); ///< call this when congestion is detected; see example use
+
+		virtual void tick(); ///< poke and update timers/history (recalculates, moves the history if needed, checks the real clock etc)
+
+		virtual double get_time_seconds() const ; ///< timer that we use, time in seconds, monotionic
+		virtual double get_current_overheat() const; ///< did we detected congestion now. NOT USED NOW TODO
+		virtual void set_overheat(double lag); ///< did we detected congestion now. NOT USED NOW TODO.  rename to add_overheat ?
+
+		// time calculations:
+		virtual void calculate_times(size_t packet_size, calculate_times_struct &cts, bool dbg, double force_window) const; ///< MAIN LOGIC (see base class for info)
+
+		virtual network_time_seconds get_sleep_time_after_tick(size_t packet_size); ///< increase the timer if needed, and get the package size
+		virtual network_time_seconds get_sleep_time(size_t packet_size) const; ///< gets the Delay (recommended Delay time) from calc. (not safe: only if time didnt change?) TODO
+
+		virtual size_t get_recommended_size_of_planned_transport() const; ///< what should be the size (bytes) of next data block to be transported
+		virtual size_t get_recommended_size_of_planned_transport_window(double force_window) const;  ///< ditto, but for given windows time frame
+		//virtual void add_planned_transport(size_t size);
+
+	private:
+		virtual network_time_seconds time_to_slot(network_time_seconds t) const { return std::floor( t ); } // convert exact time eg 13.7 to rounded time for slot number in history 13
+        virtual void _handle_trafic_exact(size_t packet_size, size_t orginal_size);
+        virtual void logger_handle_net(const std::string &filename, double time, size_t size);
+};
+
+/***
+ * The complete set of traffic throttle for one typical connection
+*/
+struct network_throttle_bw {
+	public:
+		network_throttle m_in; ///< for incomming traffic (this we can not controll directly as it depends of what others send to us - usually)
+		network_throttle m_inreq; ///< for requesting incomming traffic (this is exact usually)
+		network_throttle m_out; ///< for outgoing traffic that we just sent (this is exact usually)
+
+	public:
+		network_throttle_bw(const std::string &name1);
+};
+
+
+
+} // namespace net_utils
+} // namespace epee
+
+
+#endif
+
+
diff --git a/src/p2p/network_throttle.cpp b/src/p2p/network_throttle.cpp
new file mode 100644
index 000000000..3d5edcdcd
--- /dev/null
+++ b/src/p2p/network_throttle.cpp
@@ -0,0 +1,121 @@
+/**
+@file
+@author rfree (current maintainer in monero.cc project)
+@brief interface for throttling of connection (count and rate-limit speed etc) 
+@details <PRE>
+
+Throttling work by:
+1) taking note of all traffic (hooks added e.g. to connection class) and measuring speed
+2) depending on that information we sleep before sending out data (or send smaller portions of data)
+3) depending on the information we can also sleep before sending requests or ask for smaller sets of data to download
+
+</PRE> 
+
+@image html images/net/rate1-down-1k.png
+@image html images/net/rate1-down-full.png
+@image html images/net/rate1-up-10k.png
+@image html images/net/rate1-up-full.png
+@image html images/net/rate2-down-100k.png
+@image html images/net/rate2-down-10k.png
+@image html images/net/rate2-down-50k.png
+@image html images/net/rate2-down-full.png
+@image html images/net/rate2-up-100k.png
+@image html images/net/rate2-up-10k.png
+@image html images/net/rate3-up-10k.png
+
+
+*/
+
+// Copyright (c) 2014, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+
+#include "../../src/p2p/network_throttle-detail.hpp"
+
+namespace epee
+{
+namespace net_utils
+{
+
+// ================================================================================================
+// network_throttle_manager
+// ================================================================================================
+
+// ================================================================================================
+// static:
+std::mutex network_throttle_manager::m_lock_get_global_throttle_in;
+std::mutex network_throttle_manager::m_lock_get_global_throttle_inreq;
+std::mutex network_throttle_manager::m_lock_get_global_throttle_out;
+
+int network_throttle_manager::xxx;
+
+
+// ================================================================================================
+// methods:
+i_network_throttle & network_throttle_manager::get_global_throttle_in() { 
+
+	std::call_once(m_once_get_global_throttle_in, [] { m_obj_get_global_throttle_in.reset(new network_throttle("in/all","<<< global-IN",10)); }	);
+	return * m_obj_get_global_throttle_in;
+}
+std::once_flag network_throttle_manager::m_once_get_global_throttle_in;
+std::unique_ptr<i_network_throttle> network_throttle_manager::m_obj_get_global_throttle_in;
+
+
+
+i_network_throttle & network_throttle_manager::get_global_throttle_inreq() { 
+	std::call_once(m_once_get_global_throttle_inreq, [] { m_obj_get_global_throttle_inreq.reset(new network_throttle("inreq/all", "<== global-IN-REQ",10)); }	);
+	return * m_obj_get_global_throttle_inreq;
+}
+std::once_flag network_throttle_manager::m_once_get_global_throttle_inreq;
+std::unique_ptr<i_network_throttle> network_throttle_manager::m_obj_get_global_throttle_inreq;
+
+
+i_network_throttle & network_throttle_manager::get_global_throttle_out() { 
+	std::call_once(m_once_get_global_throttle_out, [] { m_obj_get_global_throttle_out.reset(new network_throttle("out/all", ">>> global-OUT",10)); }	);
+	return * m_obj_get_global_throttle_out;
+}
+std::once_flag network_throttle_manager::m_once_get_global_throttle_out;
+std::unique_ptr<i_network_throttle> network_throttle_manager::m_obj_get_global_throttle_out;
+
+
+
+
+network_throttle_bw::network_throttle_bw(const std::string &name1) 
+	: m_in("in/"+name1, name1+"-DOWNLOAD"), m_inreq("inreq/"+name1, name1+"-DOWNLOAD-REQUESTS"), m_out("out/"+name1, name1+"-UPLOAD")
+{ }
+
+
+
+
+} // namespace 
+} // namespace 
+
+
+
+
+
diff --git a/src/p2p/network_throttle.hpp b/src/p2p/network_throttle.hpp
new file mode 100644
index 000000000..dc25a2c45
--- /dev/null
+++ b/src/p2p/network_throttle.hpp
@@ -0,0 +1,187 @@
+/// @file
+/// @author rfree (current maintainer in monero.cc project)
+/// @brief interface for throttling of connection (count and rate-limit speed etc)
+
+// Copyright (c) 2014, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+
+/* rfree: throttle basic interface */
+/* rfree: also includes the manager for singeton/global such objects */
+
+
+#ifndef INCLUDED_p2p_network_throttle_hpp
+#define INCLUDED_p2p_network_throttle_hpp
+
+#include <boost/asio.hpp>
+#include <string>
+#include <vector>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <atomic>
+
+#include <boost/asio.hpp>
+#include <boost/array.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/interprocess/detail/atomic.hpp>
+#include <boost/thread/thread.hpp>
+
+#include "syncobj.h"
+
+#include "../../contrib/epee/include/net/net_utils_base.h" 
+#include "../../contrib/epee/include/misc_log_ex.h" 
+#include <boost/lambda/bind.hpp>
+#include <boost/foreach.hpp>
+#include <boost/lambda/lambda.hpp>
+#include <boost/uuid/random_generator.hpp>
+#include <boost/chrono.hpp>
+#include <boost/utility/value_init.hpp>
+#include <boost/asio/deadline_timer.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <boost/thread/thread.hpp> 
+#include "misc_language.h"
+#include "pragma_comp_defs.h"
+#include <sstream>
+#include <iomanip>
+#include <algorithm>
+
+#include <memory>
+#include <mutex>
+#include <fstream>
+
+namespace epee
+{
+namespace net_utils
+{
+
+// just typedefs to in code define the units used. TODO later it will be enforced that casts to other numericals are only explicit to avoid mistakes? use boost::chrono?
+typedef double network_speed_kbps;
+typedef double network_time_seconds;
+typedef double network_MB;
+
+class i_network_throttle;
+
+/***
+@brief All information about given throttle - speed calculations
+*/
+struct calculate_times_struct {
+		double average;
+		double window;
+		double delay;
+		double recomendetDataSize;
+};
+typedef calculate_times_struct calculate_times_struct;
+
+
+namespace cryptonote { class cryptonote_protocol_handler_base; }; // a friend class // TODO friend not working
+
+/*** 
+@brief Access to simple throttles, with singlton to access global network limits
+*/
+class network_throttle_manager {
+	// provides global (singleton) in/inreq/out throttle access
+
+	// [[note1]] see also http://www.nuonsoft.com/blog/2012/10/21/implementing-a-thread-safe-singleton-with-c11/
+	// [[note2]] _inreq is the requested in traffic - we anticipate we will get in-bound traffic soon as result of what we do (e.g. that we sent network downloads requests)
+	
+	//protected:
+	public: // XXX
+		// [[note1]]
+		static std::once_flag m_once_get_global_throttle_in; 
+		static std::once_flag m_once_get_global_throttle_inreq; // [[note2]]
+		static std::once_flag m_once_get_global_throttle_out;
+		static std::unique_ptr<i_network_throttle> m_obj_get_global_throttle_in;
+		static std::unique_ptr<i_network_throttle> m_obj_get_global_throttle_inreq;
+		static std::unique_ptr<i_network_throttle> m_obj_get_global_throttle_out;
+
+    static std::mutex m_lock_get_global_throttle_in;
+    static std::mutex m_lock_get_global_throttle_inreq;
+    static std::mutex m_lock_get_global_throttle_out;
+
+		friend class cryptonote::cryptonote_protocol_handler_base; // FRIEND - to directly access global throttle-s. !! REMEMBER TO USE LOCKS!
+		friend class connection_basic; // FRIEND - to directly access global throttle-s. !! REMEMBER TO USE LOCKS!
+		friend class connection_basic_pimpl; // ditto
+
+		static int xxx;
+
+	public:
+		static i_network_throttle & get_global_throttle_in(); ///< singleton ; for friend class ; caller MUST use proper locks! like m_lock_get_global_throttle_in
+		static i_network_throttle & get_global_throttle_inreq(); ///< ditto ; use lock ... use m_lock_get_global_throttle_inreq obviously
+		static i_network_throttle & get_global_throttle_out(); ///< ditto ; use lock ... use m_lock_get_global_throttle_out obviously
+};
+
+
+
+/***
+@brief interface for the throttle, see the derivated class
+*/
+class i_network_throttle {
+	public:
+		virtual void set_name(const std::string &name)=0;
+		virtual void set_target_speed( network_speed_kbps target )=0;
+		virtual void set_target_kill( network_MB target )=0;
+
+		virtual void handle_trafic_exact(size_t packet_size) =0; // count the new traffic/packet; the size is exact considering all network costs
+		virtual void handle_trafic_tcp(size_t packet_size) =0; // count the new traffic/packet; the size is as TCP, we will consider MTU etc
+		virtual void handle_congestion(double overheat) =0; // call this when congestion is detected; see example use
+		virtual void tick() =0; // poke and update timers/history
+		
+		// time calculations:
+		
+		virtual void calculate_times(size_t packet_size, calculate_times_struct &cts, bool dbg, double force_window) const =0; // assuming sending new package (or 0), calculate:
+		// Average, Window, Delay, Recommended data size ; also gets dbg=debug flag, and forced widnow size if >0 or -1 for not forcing window size 
+
+		// Average speed, Window size, recommended Delay to sleep now, Recommended size of data to send now
+
+		virtual network_time_seconds get_sleep_time(size_t packet_size) const =0; // gets the D (recommended Delay time) from calc
+		virtual network_time_seconds get_sleep_time_after_tick(size_t packet_size) =0; // ditto, but first tick the timer
+
+		virtual size_t get_recommended_size_of_planned_transport() const =0; // what should be the recommended limit of data size that we can transport over current network_throttle in near future
+
+		virtual double get_time_seconds() const =0; // a timer
+		virtual double get_current_overheat() const =0;
+        virtual void set_overheat(double lag) =0;
+        virtual void logger_handle_net(const std::string &filename, double time, size_t size)=0;
+
+
+};
+
+
+// ... more in the -advanced.h file
+
+
+} // namespace net_utils
+} // namespace epee
+
+
+#endif
+
+
+