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wownero/contrib/epee/include/net/abstract_tcp_server2.inl
rbrunner7 cf5f623616 Corrections in rate limiting / trottle code, especially in 'out' direction 
Deleted 3 out of 4 calls to method connection_basic::sleep_before_packet
that were erroneous / superfluous, which enabled the elimination of a
"fudge" factor of 2.1 in connection_basic::set_rate_up_limit;
also ended the multiplying of limit values and numbers of bytes
transferred by 1024 before handing them over to the global throttle
objects
2017-11-28 21:18:01 +01:00

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/**
@file
@author from CrypoNote (see copyright below; Andrey N. Sabelnikov)
@monero rfree
@brief the connection templated-class for one peer connection
*/
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of the Andrey N. Sabelnikov 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 OWNER 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 "net_utils_base.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> // TODO
#include <boost/thread/v2/thread.hpp> // TODO
#include "misc_language.h"
#include "pragma_comp_defs.h"
#include <sstream>
#include <iomanip>
#include <algorithm>
#include "../../../../src/cryptonote_core/cryptonote_core.h" // e.g. for the send_stop_signal()
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net"
PRAGMA_WARNING_PUSH
namespace epee
{
namespace net_utils
{
/************************************************************************/
/* */
/************************************************************************/
PRAGMA_WARNING_DISABLE_VS(4355)
template<class t_protocol_handler>
connection<t_protocol_handler>::connection( boost::asio::io_service& io_service,
typename t_protocol_handler::config_type& config,
std::atomic<long> &ref_sock_count, // the ++/-- counter
std::atomic<long> &sock_number, // the only increasing ++ number generator
i_connection_filter* &pfilter
,t_connection_type connection_type
)
:
connection_basic(io_service, ref_sock_count, sock_number),
m_protocol_handler(this, config, context),
m_pfilter( pfilter ),
m_connection_type( connection_type ),
m_throttle_speed_in("speed_in", "throttle_speed_in"),
m_throttle_speed_out("speed_out", "throttle_speed_out")
{
MDEBUG("test, connection constructor set m_connection_type="<<m_connection_type);
}
PRAGMA_WARNING_DISABLE_VS(4355)
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
connection<t_protocol_handler>::~connection() noexcept(false)
{
if(!m_was_shutdown)
{
_dbg3("[sock " << socket_.native_handle() << "] Socket destroyed without shutdown.");
shutdown();
}
_dbg3("[sock " << socket_.native_handle() << "] Socket destroyed");
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boost::asio::ip::tcp::socket& connection<t_protocol_handler>::socket()
{
return socket_;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boost::shared_ptr<connection<t_protocol_handler> > connection<t_protocol_handler>::safe_shared_from_this()
{
try
{
return connection<t_protocol_handler>::shared_from_this();
}
catch (const boost::bad_weak_ptr&)
{
// It happens when the connection is being deleted
return boost::shared_ptr<connection<t_protocol_handler> >();
}
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::start(bool is_income, bool is_multithreaded)
{
TRY_ENTRY();
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if(!self)
return false;
m_is_multithreaded = is_multithreaded;
boost::system::error_code ec;
auto remote_ep = socket_.remote_endpoint(ec);
CHECK_AND_NO_ASSERT_MES(!ec, false, "Failed to get remote endpoint: " << ec.message() << ':' << ec.value());
CHECK_AND_NO_ASSERT_MES(remote_ep.address().is_v4(), false, "IPv6 not supported here");
auto local_ep = socket_.local_endpoint(ec);
CHECK_AND_NO_ASSERT_MES(!ec, false, "Failed to get local endpoint: " << ec.message() << ':' << ec.value());
context = boost::value_initialized<t_connection_context>();
const unsigned long ip_{boost::asio::detail::socket_ops::host_to_network_long(remote_ep.address().to_v4().to_ulong())};
// create a random uuid
boost::uuids::uuid random_uuid;
// that stuff turns out to be included, even though it's from src... Taking advantage
random_uuid = crypto::rand<boost::uuids::uuid>();
context.set_details(random_uuid, epee::net_utils::ipv4_network_address(ip_, remote_ep.port()), is_income);
_dbg3("[sock " << socket_.native_handle() << "] new connection from " << print_connection_context_short(context) <<
" to " << local_ep.address().to_string() << ':' << local_ep.port() <<
", total sockets objects " << m_ref_sock_count);
if(m_pfilter && !m_pfilter->is_remote_host_allowed(context.m_remote_address))
{
_dbg2("[sock " << socket_.native_handle() << "] host denied " << context.m_remote_address.host_str() << ", shutdowning connection");
close();
return false;
}
m_protocol_handler.after_init_connection();
socket_.async_read_some(boost::asio::buffer(buffer_),
strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_read, self,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)));
#if !defined(_WIN32) || !defined(__i686)
// not supported before Windows7, too lazy for runtime check
// Just exclude for 32bit windows builds
//set ToS flag
int tos = get_tos_flag();
boost::asio::detail::socket_option::integer< IPPROTO_IP, IP_TOS >
optionTos( tos );
socket_.set_option( optionTos );
//_dbg1("Set ToS flag to " << tos);
#endif
boost::asio::ip::tcp::no_delay noDelayOption(false);
socket_.set_option(noDelayOption);
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::start()", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::request_callback()
{
TRY_ENTRY();
_dbg2("[" << print_connection_context_short(context) << "] request_callback");
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if(!self)
return false;
strand_.post(boost::bind(&connection<t_protocol_handler>::call_back_starter, self));
CATCH_ENTRY_L0("connection<t_protocol_handler>::request_callback()", false);
return true;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boost::asio::io_service& connection<t_protocol_handler>::get_io_service()
{
return socket_.get_io_service();
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::add_ref()
{
TRY_ENTRY();
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if(!self)
return false;
//_dbg3("[sock " << socket_.native_handle() << "] add_ref, m_peer_number=" << mI->m_peer_number);
CRITICAL_REGION_LOCAL(self->m_self_refs_lock);
//_dbg3("[sock " << socket_.native_handle() << "] add_ref 2, m_peer_number=" << mI->m_peer_number);
if(m_was_shutdown)
return false;
m_self_refs.push_back(self);
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::add_ref()", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::release()
{
TRY_ENTRY();
boost::shared_ptr<connection<t_protocol_handler> > back_connection_copy;
LOG_TRACE_CC(context, "[sock " << socket_.native_handle() << "] release");
CRITICAL_REGION_BEGIN(m_self_refs_lock);
CHECK_AND_ASSERT_MES(m_self_refs.size(), false, "[sock " << socket_.native_handle() << "] m_self_refs empty at connection<t_protocol_handler>::release() call");
//erasing from container without additional copy can cause start deleting object, including m_self_refs
back_connection_copy = m_self_refs.back();
m_self_refs.pop_back();
CRITICAL_REGION_END();
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::release()", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::call_back_starter()
{
TRY_ENTRY();
_dbg2("[" << print_connection_context_short(context) << "] fired_callback");
m_protocol_handler.handle_qued_callback();
CATCH_ENTRY_L0("connection<t_protocol_handler>::call_back_starter()", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::save_dbg_log()
{
std::string address, port;
boost::system::error_code e;
boost::asio::ip::tcp::endpoint endpoint = socket_.remote_endpoint(e);
if (e)
{
address = "<not connected>";
port = "<not connected>";
}
else
{
address = endpoint.address().to_string();
port = boost::lexical_cast<std::string>(endpoint.port());
}
MDEBUG(" connection type " << to_string( m_connection_type ) << " "
<< socket_.local_endpoint().address().to_string() << ":" << socket_.local_endpoint().port()
<< " <--> " << address << ":" << port);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::handle_read(const boost::system::error_code& e,
std::size_t bytes_transferred)
{
TRY_ENTRY();
//_info("[sock " << socket_.native_handle() << "] Async read calledback.");
if (!e)
{
{
CRITICAL_REGION_LOCAL(m_throttle_speed_in_mutex);
m_throttle_speed_in.handle_trafic_exact(bytes_transferred);
context.m_current_speed_down = m_throttle_speed_in.get_current_speed();
}
{
CRITICAL_REGION_LOCAL( epee::net_utils::network_throttle_manager::network_throttle_manager::m_lock_get_global_throttle_in );
epee::net_utils::network_throttle_manager::network_throttle_manager::get_global_throttle_in().handle_trafic_exact(bytes_transferred);
}
double delay=0; // will be calculated - how much we should sleep to obey speed limit etc
if (speed_limit_is_enabled()) {
do // keep sleeping if we should sleep
{
{ //_scope_dbg1("CRITICAL_REGION_LOCAL");
CRITICAL_REGION_LOCAL( epee::net_utils::network_throttle_manager::m_lock_get_global_throttle_in );
delay = epee::net_utils::network_throttle_manager::get_global_throttle_in().get_sleep_time_after_tick( bytes_transferred );
}
delay *= 0.5;
if (delay > 0) {
long int ms = (long int)(delay * 100);
boost::this_thread::sleep_for(boost::chrono::milliseconds(ms));
}
} while(delay > 0);
} // any form of sleeping
//_info("[sock " << socket_.native_handle() << "] RECV " << bytes_transferred);
logger_handle_net_read(bytes_transferred);
context.m_last_recv = time(NULL);
context.m_recv_cnt += bytes_transferred;
bool recv_res = m_protocol_handler.handle_recv(buffer_.data(), bytes_transferred);
if(!recv_res)
{
//_info("[sock " << socket_.native_handle() << "] protocol_want_close");
//some error in protocol, protocol handler ask to close connection
boost::interprocess::ipcdetail::atomic_write32(&m_want_close_connection, 1);
bool do_shutdown = false;
CRITICAL_REGION_BEGIN(m_send_que_lock);
if(!m_send_que.size())
do_shutdown = true;
CRITICAL_REGION_END();
if(do_shutdown)
shutdown();
}else
{
socket_.async_read_some(boost::asio::buffer(buffer_),
strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_read, connection<t_protocol_handler>::shared_from_this(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)));
//_info("[sock " << socket_.native_handle() << "]Async read requested.");
}
}else
{
_dbg3("[sock " << socket_.native_handle() << "] Some not success at read: " << e.message() << ':' << e.value());
if(e.value() != 2)
{
_dbg3("[sock " << socket_.native_handle() << "] Some problems at read: " << e.message() << ':' << e.value());
shutdown();
}
}
// If an error occurs then no new asynchronous operations are started. This
// means that all shared_ptr references to the connection object will
// disappear and the object will be destroyed automatically after this
// handler returns. The connection class's destructor closes the socket.
CATCH_ENTRY_L0("connection<t_protocol_handler>::handle_read", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::call_run_once_service_io()
{
TRY_ENTRY();
if(!m_is_multithreaded)
{
//single thread model, we can wait in blocked call
size_t cnt = socket_.get_io_service().run_one();
if(!cnt)//service is going to quit
return false;
}else
{
//multi thread model, we can't(!) wait in blocked call
//so we make non blocking call and releasing CPU by calling sleep(0);
//if no handlers were called
//TODO: Maybe we need to have have critical section + event + callback to upper protocol to
//ask it inside(!) critical region if we still able to go in event wait...
size_t cnt = socket_.get_io_service().poll_one();
if(!cnt)
misc_utils::sleep_no_w(0);
}
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::call_run_once_service_io", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::do_send(const void* ptr, size_t cb) {
TRY_ENTRY();
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if (!self) return false;
if (m_was_shutdown) return false;
// TODO avoid copy
const double factor = 32; // TODO config
typedef long long signed int t_safe; // my t_size to avoid any overunderflow in arithmetic
const t_safe chunksize_good = (t_safe)( 1024 * std::max(1.0,factor) );
const t_safe chunksize_max = chunksize_good * 2 ;
const bool allow_split = (m_connection_type == e_connection_type_RPC) ? false : true; // do not split RPC data
CHECK_AND_ASSERT_MES(! (chunksize_max<0), false, "Negative chunksize_max" ); // make sure it is unsigned before removin sign with cast:
long long unsigned int chunksize_max_unsigned = static_cast<long long unsigned int>( chunksize_max ) ;
if (allow_split && (cb > chunksize_max_unsigned)) {
{ // LOCK: chunking
epee::critical_region_t<decltype(m_chunking_lock)> send_guard(m_chunking_lock); // *** critical ***
MDEBUG("do_send() will SPLIT into small chunks, from packet="<<cb<<" B for ptr="<<ptr);
t_safe all = cb; // all bytes to send
t_safe pos = 0; // current sending position
// 01234567890
// ^^^^ (pos=0, len=4) ; pos:=pos+len, pos=4
// ^^^^ (pos=4, len=4) ; pos:=pos+len, pos=8
// ^^^ (pos=8, len=4) ;
// const size_t bufsize = chunksize_good; // TODO safecast
// char* buf = new char[ bufsize ];
bool all_ok = true;
while (pos < all) {
t_safe lenall = all-pos; // length from here to end
t_safe len = std::min( chunksize_good , lenall); // take a smaller part
CHECK_AND_ASSERT_MES(len<=chunksize_good, false, "len too large");
// pos=8; len=4; all=10; len=3;
CHECK_AND_ASSERT_MES(! (len<0), false, "negative len"); // check before we cast away sign:
unsigned long long int len_unsigned = static_cast<long long int>( len );
CHECK_AND_ASSERT_MES(len>0, false, "len not strictly positive"); // (redundant)
CHECK_AND_ASSERT_MES(len_unsigned < std::numeric_limits<size_t>::max(), false, "Invalid len_unsigned"); // yeap we want strong < then max size, to be sure
void *chunk_start = ((char*)ptr) + pos;
MDEBUG("chunk_start="<<chunk_start<<" ptr="<<ptr<<" pos="<<pos);
CHECK_AND_ASSERT_MES(chunk_start >= ptr, false, "Pointer wraparound"); // not wrapped around address?
//std::memcpy( (void*)buf, chunk_start, len);
MDEBUG("part of " << lenall << ": pos="<<pos << " len="<<len);
bool ok = do_send_chunk(chunk_start, len); // <====== ***
all_ok = all_ok && ok;
if (!all_ok) {
MDEBUG("do_send() DONE ***FAILED*** from packet="<<cb<<" B for ptr="<<ptr);
MDEBUG("do_send() SEND was aborted in middle of big package - this is mostly harmless "
<< " (e.g. peer closed connection) but if it causes trouble tell us at #monero-dev. " << cb);
return false; // partial failure in sending
}
pos = pos+len;
CHECK_AND_ASSERT_MES(pos >0, false, "pos <= 0");
// (in catch block, or uniq pointer) delete buf;
} // each chunk
MDEBUG("do_send() DONE SPLIT from packet="<<cb<<" B for ptr="<<ptr);
MDEBUG("do_send() m_connection_type = " << m_connection_type);
return all_ok; // done - e.g. queued - all the chunks of current do_send call
} // LOCK: chunking
} // a big block (to be chunked) - all chunks
else { // small block
return do_send_chunk(ptr,cb); // just send as 1 big chunk
}
CATCH_ENTRY_L0("connection<t_protocol_handler>::do_send", false);
} // do_send()
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::do_send_chunk(const void* ptr, size_t cb)
{
TRY_ENTRY();
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if(!self)
return false;
if(m_was_shutdown)
return false;
{
CRITICAL_REGION_LOCAL(m_throttle_speed_out_mutex);
m_throttle_speed_out.handle_trafic_exact(cb);
context.m_current_speed_up = m_throttle_speed_out.get_current_speed();
}
//_info("[sock " << socket_.native_handle() << "] SEND " << cb);
context.m_last_send = time(NULL);
context.m_send_cnt += cb;
//some data should be wrote to stream
//request complete
// No sleeping here; sleeping is done once and for all in "handle_write"
m_send_que_lock.lock(); // *** critical ***
epee::misc_utils::auto_scope_leave_caller scope_exit_handler = epee::misc_utils::create_scope_leave_handler([&](){m_send_que_lock.unlock();});
long int retry=0;
const long int retry_limit = 5*4;
while (m_send_que.size() > ABSTRACT_SERVER_SEND_QUE_MAX_COUNT)
{
retry++;
/* if ( ::cryptonote::core::get_is_stopping() ) { // TODO re-add fast stop
_fact("ABORT queue wait due to stopping");
return false; // aborted
}*/
long int ms = 250 + (rand()%50);
MDEBUG("Sleeping because QUEUE is FULL, in " << __FUNCTION__ << " for " << ms << " ms before packet_size="<<cb); // XXX debug sleep
m_send_que_lock.unlock();
boost::this_thread::sleep(boost::posix_time::milliseconds( ms ) );
m_send_que_lock.lock();
_dbg1("sleep for queue: " << ms);
if (retry > retry_limit) {
MWARNING("send que size is more than ABSTRACT_SERVER_SEND_QUE_MAX_COUNT(" << ABSTRACT_SERVER_SEND_QUE_MAX_COUNT << "), shutting down connection");
shutdown();
return false;
}
}
m_send_que.resize(m_send_que.size()+1);
m_send_que.back().assign((const char*)ptr, cb);
if(m_send_que.size() > 1)
{ // active operation should be in progress, nothing to do, just wait last operation callback
auto size_now = cb;
MDEBUG("do_send() NOW just queues: packet="<<size_now<<" B, is added to queue-size="<<m_send_que.size());
//do_send_handler_delayed( ptr , size_now ); // (((H))) // empty function
LOG_TRACE_CC(context, "[sock " << socket_.native_handle() << "] Async send requested " << m_send_que.front().size());
}
else
{ // no active operation
if(m_send_que.size()!=1)
{
_erro("Looks like no active operations, but send que size != 1!!");
return false;
}
auto size_now = m_send_que.front().size();
MDEBUG("do_send() NOW SENSD: packet="<<size_now<<" B");
if (speed_limit_is_enabled())
do_send_handler_write( ptr , size_now ); // (((H)))
CHECK_AND_ASSERT_MES( size_now == m_send_que.front().size(), false, "Unexpected queue size");
boost::asio::async_write(socket_, boost::asio::buffer(m_send_que.front().data(), size_now ) ,
//strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_write, self, _1, _2)
//)
);
//_dbg3("(chunk): " << size_now);
//logger_handle_net_write(size_now);
//_info("[sock " << socket_.native_handle() << "] Async send requested " << m_send_que.front().size());
}
//do_send_handler_stop( ptr , cb ); // empty function
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::do_send", false);
} // do_send_chunk
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::shutdown()
{
// Initiate graceful connection closure.
boost::system::error_code ignored_ec;
socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);
m_was_shutdown = true;
m_protocol_handler.release_protocol();
return true;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::close()
{
TRY_ENTRY();
//_info("[sock " << socket_.native_handle() << "] Que Shutdown called.");
size_t send_que_size = 0;
CRITICAL_REGION_BEGIN(m_send_que_lock);
send_que_size = m_send_que.size();
CRITICAL_REGION_END();
boost::interprocess::ipcdetail::atomic_write32(&m_want_close_connection, 1);
if(!send_que_size)
{
shutdown();
}
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::close", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::cancel()
{
return close();
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::handle_write(const boost::system::error_code& e, size_t cb)
{
TRY_ENTRY();
LOG_TRACE_CC(context, "[sock " << socket_.native_handle() << "] Async send calledback " << cb);
if (e)
{
_dbg1("[sock " << socket_.native_handle() << "] Some problems at write: " << e.message() << ':' << e.value());
shutdown();
return;
}
logger_handle_net_write(cb);
// The single sleeping that is needed for correctly handling "out" speed throttling
if (speed_limit_is_enabled()) {
sleep_before_packet(cb, 1, 1);
}
bool do_shutdown = false;
CRITICAL_REGION_BEGIN(m_send_que_lock);
if(m_send_que.empty())
{
_erro("[sock " << socket_.native_handle() << "] m_send_que.size() == 0 at handle_write!");
return;
}
m_send_que.pop_front();
if(m_send_que.empty())
{
if(boost::interprocess::ipcdetail::atomic_read32(&m_want_close_connection))
{
do_shutdown = true;
}
}else
{
//have more data to send
auto size_now = m_send_que.front().size();
MDEBUG("handle_write() NOW SENDS: packet="<<size_now<<" B" <<", from queue size="<<m_send_que.size());
if (speed_limit_is_enabled())
do_send_handler_write_from_queue(e, m_send_que.front().size() , m_send_que.size()); // (((H)))
CHECK_AND_ASSERT_MES( size_now == m_send_que.front().size(), void(), "Unexpected queue size");
boost::asio::async_write(socket_, boost::asio::buffer(m_send_que.front().data(), size_now) ,
// strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_write, connection<t_protocol_handler>::shared_from_this(), _1, _2)
// )
);
//_dbg3("(normal)" << size_now);
}
CRITICAL_REGION_END();
if(do_shutdown)
{
shutdown();
}
CATCH_ENTRY_L0("connection<t_protocol_handler>::handle_write", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::setRpcStation()
{
m_connection_type = e_connection_type_RPC;
MDEBUG("set m_connection_type = RPC ");
}
template<class t_protocol_handler>
bool connection<t_protocol_handler>::speed_limit_is_enabled() const {
return m_connection_type != e_connection_type_RPC ;
}
/************************************************************************/
/* */
/************************************************************************/
template<class t_protocol_handler>
boosted_tcp_server<t_protocol_handler>::boosted_tcp_server( t_connection_type connection_type ) :
m_io_service_local_instance(new boost::asio::io_service()),
io_service_(*m_io_service_local_instance.get()),
acceptor_(io_service_),
m_stop_signal_sent(false), m_port(0),
m_sock_count(0), m_sock_number(0), m_threads_count(0),
m_pfilter(NULL), m_thread_index(0),
m_connection_type( connection_type ),
new_connection_()
{
create_server_type_map();
m_thread_name_prefix = "NET";
}
template<class t_protocol_handler>
boosted_tcp_server<t_protocol_handler>::boosted_tcp_server(boost::asio::io_service& extarnal_io_service, t_connection_type connection_type) :
io_service_(extarnal_io_service),
acceptor_(io_service_),
m_stop_signal_sent(false), m_port(0),
m_sock_count(0), m_sock_number(0), m_threads_count(0),
m_pfilter(NULL), m_thread_index(0),
m_connection_type(connection_type),
new_connection_()
{
create_server_type_map();
m_thread_name_prefix = "NET";
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boosted_tcp_server<t_protocol_handler>::~boosted_tcp_server()
{
this->send_stop_signal();
timed_wait_server_stop(10000);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::create_server_type_map()
{
server_type_map["NET"] = e_connection_type_NET;
server_type_map["RPC"] = e_connection_type_RPC;
server_type_map["P2P"] = e_connection_type_P2P;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::init_server(uint32_t port, const std::string address)
{
TRY_ENTRY();
m_stop_signal_sent = false;
m_port = port;
m_address = address;
// Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
boost::asio::ip::tcp::resolver resolver(io_service_);
boost::asio::ip::tcp::resolver::query query(address, boost::lexical_cast<std::string>(port), boost::asio::ip::tcp::resolver::query::canonical_name);
boost::asio::ip::tcp::endpoint endpoint = *resolver.resolve(query);
acceptor_.open(endpoint.protocol());
acceptor_.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
acceptor_.bind(endpoint);
acceptor_.listen();
boost::asio::ip::tcp::endpoint binded_endpoint = acceptor_.local_endpoint();
m_port = binded_endpoint.port();
MDEBUG("start accept");
new_connection_.reset(new connection<t_protocol_handler>(io_service_, m_config, m_sock_count, m_sock_number, m_pfilter, m_connection_type));
acceptor_.async_accept(new_connection_->socket(),
boost::bind(&boosted_tcp_server<t_protocol_handler>::handle_accept, this,
boost::asio::placeholders::error));
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::init_server", false);
}
//-----------------------------------------------------------------------------
PUSH_WARNINGS
DISABLE_GCC_WARNING(maybe-uninitialized)
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::init_server(const std::string port, const std::string& address)
{
uint32_t p = 0;
if (port.size() && !string_tools::get_xtype_from_string(p, port)) {
MERROR("Failed to convert port no = " << port);
return false;
}
return this->init_server(p, address);
}
POP_WARNINGS
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::worker_thread()
{
TRY_ENTRY();
uint32_t local_thr_index = boost::interprocess::ipcdetail::atomic_inc32(&m_thread_index);
std::string thread_name = std::string("[") + m_thread_name_prefix;
thread_name += boost::to_string(local_thr_index) + "]";
MLOG_SET_THREAD_NAME(thread_name);
// _fact("Thread name: " << m_thread_name_prefix);
while(!m_stop_signal_sent)
{
try
{
io_service_.run();
}
catch(const std::exception& ex)
{
_erro("Exception at server worker thread, what=" << ex.what());
}
catch(...)
{
_erro("Exception at server worker thread, unknown execption");
}
}
//_info("Worker thread finished");
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::worker_thread", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::set_threads_prefix(const std::string& prefix_name)
{
m_thread_name_prefix = prefix_name;
auto it = server_type_map.find(m_thread_name_prefix);
if (it==server_type_map.end()) throw std::runtime_error("Unknown prefix/server type:" + std::string(prefix_name));
auto connection_type = it->second; // the value of type
MINFO("Set server type to: " << connection_type << " from name: " << m_thread_name_prefix << ", prefix_name = " << prefix_name);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::set_connection_filter(i_connection_filter* pfilter)
{
m_pfilter = pfilter;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::run_server(size_t threads_count, bool wait, const boost::thread::attributes& attrs)
{
TRY_ENTRY();
m_threads_count = threads_count;
m_main_thread_id = boost::this_thread::get_id();
MLOG_SET_THREAD_NAME("[SRV_MAIN]");
while(!m_stop_signal_sent)
{
// Create a pool of threads to run all of the io_services.
CRITICAL_REGION_BEGIN(m_threads_lock);
for (std::size_t i = 0; i < threads_count; ++i)
{
boost::shared_ptr<boost::thread> thread(new boost::thread(
attrs, boost::bind(&boosted_tcp_server<t_protocol_handler>::worker_thread, this)));
_note("Run server thread name: " << m_thread_name_prefix);
m_threads.push_back(thread);
}
CRITICAL_REGION_END();
// Wait for all threads in the pool to exit.
if (wait)
{
_fact("JOINING all threads");
for (std::size_t i = 0; i < m_threads.size(); ++i) {
m_threads[i]->join();
}
_fact("JOINING all threads - almost");
m_threads.clear();
_fact("JOINING all threads - DONE");
}
else {
_dbg1("Reiniting OK.");
return true;
}
if(wait && !m_stop_signal_sent)
{
//some problems with the listening socket ?..
_dbg1("Net service stopped without stop request, restarting...");
if(!this->init_server(m_port, m_address))
{
_dbg1("Reiniting service failed, exit.");
return false;
}else
{
_dbg1("Reiniting OK.");
}
}
}
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::run_server", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::is_thread_worker()
{
TRY_ENTRY();
CRITICAL_REGION_LOCAL(m_threads_lock);
BOOST_FOREACH(boost::shared_ptr<boost::thread>& thp, m_threads)
{
if(thp->get_id() == boost::this_thread::get_id())
return true;
}
if(m_threads_count == 1 && boost::this_thread::get_id() == m_main_thread_id)
return true;
return false;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::is_thread_worker", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::timed_wait_server_stop(uint64_t wait_mseconds)
{
TRY_ENTRY();
boost::chrono::milliseconds ms(wait_mseconds);
for (std::size_t i = 0; i < m_threads.size(); ++i)
{
if(m_threads[i]->joinable() && !m_threads[i]->try_join_for(ms))
{
_dbg1("Interrupting thread " << m_threads[i]->native_handle());
m_threads[i]->interrupt();
}
}
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::timed_wait_server_stop", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::send_stop_signal()
{
m_stop_signal_sent = true;
TRY_ENTRY();
connections_mutex.lock();
for (auto &c: connections_)
{
c->cancel();
}
connections_.clear();
connections_mutex.unlock();
io_service_.stop();
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::send_stop_signal()", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::is_stop_signal_sent()
{
return m_stop_signal_sent;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::handle_accept(const boost::system::error_code& e)
{
MDEBUG("handle_accept");
TRY_ENTRY();
if (!e)
{
if (m_connection_type == e_connection_type_RPC) {
MDEBUG("New server for RPC connections");
new_connection_->setRpcStation(); // hopefully this is not needed actually
}
connection_ptr conn(std::move(new_connection_));
new_connection_.reset(new connection<t_protocol_handler>(io_service_, m_config, m_sock_count, m_sock_number, m_pfilter, m_connection_type));
acceptor_.async_accept(new_connection_->socket(),
boost::bind(&boosted_tcp_server<t_protocol_handler>::handle_accept, this,
boost::asio::placeholders::error));
conn->start(true, 1 < m_threads_count);
conn->save_dbg_log();
}else
{
_erro("Some problems at accept: " << e.message() << ", connections_count = " << m_sock_count);
}
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::handle_accept", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::connect(const std::string& adr, const std::string& port, uint32_t conn_timeout, t_connection_context& conn_context, const std::string& bind_ip)
{
TRY_ENTRY();
connection_ptr new_connection_l(new connection<t_protocol_handler>(io_service_, m_config, m_sock_count, m_sock_number, m_pfilter, m_connection_type) );
connections_mutex.lock();
connections_.insert(new_connection_l);
MDEBUG("connections_ size now " << connections_.size());
connections_mutex.unlock();
epee::misc_utils::auto_scope_leave_caller scope_exit_handler = epee::misc_utils::create_scope_leave_handler([&](){ CRITICAL_REGION_LOCAL(connections_mutex); connections_.erase(new_connection_l); });
boost::asio::ip::tcp::socket& sock_ = new_connection_l->socket();
//////////////////////////////////////////////////////////////////////////
boost::asio::ip::tcp::resolver resolver(io_service_);
boost::asio::ip::tcp::resolver::query query(boost::asio::ip::tcp::v4(), adr, port, boost::asio::ip::tcp::resolver::query::canonical_name);
boost::asio::ip::tcp::resolver::iterator iterator = resolver.resolve(query);
boost::asio::ip::tcp::resolver::iterator end;
if(iterator == end)
{
_erro("Failed to resolve " << adr);
return false;
}
//////////////////////////////////////////////////////////////////////////
//boost::asio::ip::tcp::endpoint remote_endpoint(boost::asio::ip::address::from_string(addr.c_str()), port);
boost::asio::ip::tcp::endpoint remote_endpoint(*iterator);
sock_.open(remote_endpoint.protocol());
if(bind_ip != "0.0.0.0" && bind_ip != "0" && bind_ip != "" )
{
boost::asio::ip::tcp::endpoint local_endpoint(boost::asio::ip::address::from_string(adr.c_str()), 0);
sock_.bind(local_endpoint);
}
/*
NOTICE: be careful to make sync connection from event handler: in case if all threads suddenly do sync connect, there will be no thread to dispatch events from io service.
*/
boost::system::error_code ec = boost::asio::error::would_block;
//have another free thread(s), work in wait mode, without event handling
struct local_async_context
{
boost::system::error_code ec;
boost::mutex connect_mut;
boost::condition_variable cond;
};
boost::shared_ptr<local_async_context> local_shared_context(new local_async_context());
local_shared_context->ec = boost::asio::error::would_block;
boost::unique_lock<boost::mutex> lock(local_shared_context->connect_mut);
auto connect_callback = [](boost::system::error_code ec_, boost::shared_ptr<local_async_context> shared_context)
{
shared_context->connect_mut.lock(); shared_context->ec = ec_; shared_context->cond.notify_one(); shared_context->connect_mut.unlock();
};
sock_.async_connect(remote_endpoint, boost::bind<void>(connect_callback, _1, local_shared_context));
while(local_shared_context->ec == boost::asio::error::would_block)
{
bool r = local_shared_context->cond.timed_wait(lock, boost::get_system_time() + boost::posix_time::milliseconds(conn_timeout));
if (m_stop_signal_sent)
{
if (sock_.is_open())
sock_.close();
return false;
}
if(local_shared_context->ec == boost::asio::error::would_block && !r)
{
//timeout
sock_.close();
_dbg3("Failed to connect to " << adr << ":" << port << ", because of timeout (" << conn_timeout << ")");
return false;
}
}
ec = local_shared_context->ec;
if (ec || !sock_.is_open())
{
_dbg3("Some problems at connect, message: " << ec.message());
if (sock_.is_open())
sock_.close();
return false;
}
_dbg3("Connected success to " << adr << ':' << port);
// start adds the connection to the config object's list, so we don't need to have it locally anymore
connections_mutex.lock();
connections_.erase(new_connection_l);
connections_mutex.unlock();
bool r = new_connection_l->start(false, 1 < m_threads_count);
if (r)
{
new_connection_l->get_context(conn_context);
//new_connection_l.reset(new connection<t_protocol_handler>(io_service_, m_config, m_sock_count, m_pfilter));
}
else
{
_erro("[sock " << new_connection_l->socket().native_handle() << "] Failed to start connection, connections_count = " << m_sock_count);
}
new_connection_l->save_dbg_log();
return r;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::connect", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler> template<class t_callback>
bool boosted_tcp_server<t_protocol_handler>::connect_async(const std::string& adr, const std::string& port, uint32_t conn_timeout, t_callback cb, const std::string& bind_ip)
{
TRY_ENTRY();
connection_ptr new_connection_l(new connection<t_protocol_handler>(io_service_, m_config, m_sock_count, m_sock_number, m_pfilter, m_connection_type) );
connections_mutex.lock();
connections_.insert(new_connection_l);
MDEBUG("connections_ size now " << connections_.size());
connections_mutex.unlock();
epee::misc_utils::auto_scope_leave_caller scope_exit_handler = epee::misc_utils::create_scope_leave_handler([&](){ CRITICAL_REGION_LOCAL(connections_mutex); connections_.erase(new_connection_l); });
boost::asio::ip::tcp::socket& sock_ = new_connection_l->socket();
//////////////////////////////////////////////////////////////////////////
boost::asio::ip::tcp::resolver resolver(io_service_);
boost::asio::ip::tcp::resolver::query query(boost::asio::ip::tcp::v4(), adr, port, boost::asio::ip::tcp::resolver::query::canonical_name);
boost::asio::ip::tcp::resolver::iterator iterator = resolver.resolve(query);
boost::asio::ip::tcp::resolver::iterator end;
if(iterator == end)
{
_erro("Failed to resolve " << adr);
return false;
}
//////////////////////////////////////////////////////////////////////////
boost::asio::ip::tcp::endpoint remote_endpoint(*iterator);
sock_.open(remote_endpoint.protocol());
if(bind_ip != "0.0.0.0" && bind_ip != "0" && bind_ip != "" )
{
boost::asio::ip::tcp::endpoint local_endpoint(boost::asio::ip::address::from_string(adr.c_str()), 0);
sock_.bind(local_endpoint);
}
boost::shared_ptr<boost::asio::deadline_timer> sh_deadline(new boost::asio::deadline_timer(io_service_));
//start deadline
sh_deadline->expires_from_now(boost::posix_time::milliseconds(conn_timeout));
sh_deadline->async_wait([=](const boost::system::error_code& error)
{
if(error != boost::asio::error::operation_aborted)
{
_dbg3("Failed to connect to " << adr << ':' << port << ", because of timeout (" << conn_timeout << ")");
new_connection_l->socket().close();
}
});
//start async connect
sock_.async_connect(remote_endpoint, [=](const boost::system::error_code& ec_)
{
t_connection_context conn_context = AUTO_VAL_INIT(conn_context);
boost::system::error_code ignored_ec;
boost::asio::ip::tcp::socket::endpoint_type lep = new_connection_l->socket().local_endpoint(ignored_ec);
if(!ec_)
{//success
if(!sh_deadline->cancel())
{
cb(conn_context, boost::asio::error::operation_aborted);//this mean that deadline timer already queued callback with cancel operation, rare situation
}else
{
_dbg3("[sock " << new_connection_l->socket().native_handle() << "] Connected success to " << adr << ':' << port <<
" from " << lep.address().to_string() << ':' << lep.port());
// start adds the connection to the config object's list, so we don't need to have it locally anymore
connections_mutex.lock();
connections_.erase(new_connection_l);
connections_mutex.unlock();
bool r = new_connection_l->start(false, 1 < m_threads_count);
if (r)
{
new_connection_l->get_context(conn_context);
cb(conn_context, ec_);
}
else
{
_dbg3("[sock " << new_connection_l->socket().native_handle() << "] Failed to start connection to " << adr << ':' << port);
cb(conn_context, boost::asio::error::fault);
}
}
}else
{
_dbg3("[sock " << new_connection_l->socket().native_handle() << "] Failed to connect to " << adr << ':' << port <<
" from " << lep.address().to_string() << ':' << lep.port() << ": " << ec_.message() << ':' << ec_.value());
cb(conn_context, ec_);
}
});
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::connect_async", false);
}
} // namespace
} // namespace
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