/
abstract_tcp_server2.inl
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abstract_tcp_server2.inl
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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 <boost/bind.hpp>
#include <boost/foreach.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/condition_variable.hpp> // TODO
#include <boost/make_shared.hpp>
#include "warnings.h"
#include "string_tools.h"
#include "misc_language.h"
#include "net/local_ip.h"
#include "pragma_comp_defs.h"
#include <sstream>
#include <iomanip>
#include <algorithm>
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net"
#define AGGRESSIVE_TIMEOUT_THRESHOLD 120 // sockets
#define NEW_CONNECTION_TIMEOUT_LOCAL 1200000 // 2 minutes
#define NEW_CONNECTION_TIMEOUT_REMOTE 10000 // 10 seconds
#define DEFAULT_TIMEOUT_MS_LOCAL 1800000 // 30 minutes
#define DEFAULT_TIMEOUT_MS_REMOTE 300000 // 5 minutes
#define TIMEOUT_EXTRA_MS_PER_BYTE 0.2
PRAGMA_WARNING_PUSH
namespace epee
{
namespace net_utils
{
template<typename T>
T& check_and_get(std::shared_ptr<T>& ptr)
{
CHECK_AND_ASSERT_THROW_MES(bool(ptr), "shared_state cannot be null");
return *ptr;
}
/************************************************************************/
/* */
/************************************************************************/
PRAGMA_WARNING_DISABLE_VS(4355)
template<class t_protocol_handler>
connection<t_protocol_handler>::connection( boost::asio::io_service& io_service,
std::shared_ptr<shared_state> state,
t_connection_type connection_type,
ssl_support_t ssl_support
)
: connection(boost::asio::ip::tcp::socket{io_service}, std::move(state), connection_type, ssl_support)
{
}
template<class t_protocol_handler>
connection<t_protocol_handler>::connection( boost::asio::ip::tcp::socket&& sock,
std::shared_ptr<shared_state> state,
t_connection_type connection_type,
ssl_support_t ssl_support
)
:
connection_basic(std::move(sock), state, ssl_support),
m_protocol_handler(this, check_and_get(state), context),
buffer_ssl_init_fill(0),
m_connection_type( connection_type ),
m_throttle_speed_in("speed_in", "throttle_speed_in"),
m_throttle_speed_out("speed_out", "throttle_speed_out"),
m_timer(GET_IO_SERVICE(socket_)),
m_local(false),
m_ready_to_close(false)
{
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::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();
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");
const unsigned long ip_{boost::asio::detail::socket_ops::host_to_network_long(remote_ep.address().to_v4().to_ulong())};
return start(is_income, is_multithreaded, ipv4_network_address{uint32_t(ip_), remote_ep.port()});
CATCH_ENTRY_L0("connection<t_protocol_handler>::start()", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::start(bool is_income, bool is_multithreaded, network_address real_remote)
{
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;
m_local = real_remote.is_loopback() || real_remote.is_local();
// create a random uuid, we don't need crypto strength here
const boost::uuids::uuid random_uuid = boost::uuids::random_generator()();
context = t_connection_context{};
bool ssl = m_ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_enabled;
context.set_details(random_uuid, std::move(real_remote), is_income, ssl);
boost::system::error_code ec;
auto local_ep = socket().local_endpoint(ec);
CHECK_AND_NO_ASSERT_MES(!ec, false, "Failed to get local endpoint: " << ec.message() << ':' << ec.value());
_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 " << get_state().sock_count);
if(static_cast<shared_state&>(get_state()).pfilter && !static_cast<shared_state&>(get_state()).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_host = context.m_remote_address.host_str();
try { host_count(m_host, 1); } catch(...) { /* ignore */ }
m_protocol_handler.after_init_connection();
reset_timer(boost::posix_time::milliseconds(m_local ? NEW_CONNECTION_TIMEOUT_LOCAL : NEW_CONNECTION_TIMEOUT_REMOTE), false);
// first read on the raw socket to detect SSL for the server
buffer_ssl_init_fill = 0;
if (is_income && m_ssl_support != epee::net_utils::ssl_support_t::e_ssl_support_disabled)
socket().async_receive(boost::asio::buffer(buffer_),
boost::asio::socket_base::message_peek,
strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_receive, self,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)));
else
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 GET_IO_SERVICE(socket());
}
//---------------------------------------------------------------------------------
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_reference_count;
m_self_ref = std::move(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_reference_count, false, "[sock " << socket().native_handle() << "] m_reference_count already at 0 at connection<t_protocol_handler>::release() call");
// is this the last reference?
if (--m_reference_count == 0) {
// move the held reference to a local variable, keeping the object alive until the function terminates
std::swap(back_connection_copy, m_self_ref);
}
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()
<< " <--> " << context.m_remote_address.str() << " (via " << 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)
{
double current_speed_down;
{
CRITICAL_REGION_LOCAL(m_throttle_speed_in_mutex);
m_throttle_speed_in.handle_trafic_exact(bytes_transferred);
current_speed_down = m_throttle_speed_in.get_current_speed();
}
context.m_current_speed_down = current_speed_down;
context.m_max_speed_down = std::max(context.m_max_speed_down, current_speed_down);
{
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);
reset_timer(boost::posix_time::milliseconds(ms + 1), true);
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;
m_ready_to_close = false;
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
{
reset_timer(get_timeout_from_bytes_read(bytes_transferred), false);
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();
}
else
{
_dbg3("[sock " << socket().native_handle() << "] peer closed connection");
if (m_ready_to_close)
shutdown();
}
m_ready_to_close = true;
}
// 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>
void connection<t_protocol_handler>::handle_receive(const boost::system::error_code& e,
std::size_t bytes_transferred)
{
TRY_ENTRY();
if (e)
{
// offload the error case
handle_read(e, bytes_transferred);
return;
}
reset_timer(get_timeout_from_bytes_read(bytes_transferred), false);
buffer_ssl_init_fill += bytes_transferred;
if (buffer_ssl_init_fill <= get_ssl_magic_size())
{
socket().async_receive(boost::asio::buffer(buffer_.data() + buffer_ssl_init_fill, buffer_.size() - buffer_ssl_init_fill),
boost::asio::socket_base::message_peek,
strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_receive, connection<t_protocol_handler>::shared_from_this(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)));
return;
}
// detect SSL
if (m_ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_autodetect)
{
if (is_ssl((const unsigned char*)buffer_.data(), buffer_ssl_init_fill))
{
MDEBUG("That looks like SSL");
m_ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_enabled; // read/write to the SSL socket
}
else
{
MDEBUG("That does not look like SSL");
m_ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_disabled; // read/write to the raw socket
}
}
if (m_ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_enabled)
{
// Handshake
if (!handshake(boost::asio::ssl::stream_base::server))
{
MERROR("SSL handshake failed");
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();
return;
}
}
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)));
// 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_receive", 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 = GET_IO_SERVICE(socket()).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 = GET_IO_SERVICE(socket()).poll_one();
if(!cnt)
misc_utils::sleep_no_w(1);
}
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(byte_slice message) {
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
std::uint8_t const* const message_data = message.data();
const std::size_t message_size = message.size();
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 && (message_size > 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="<<message_size<<" B for ptr="<<message_data);
// 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 (!message.empty()) {
byte_slice chunk = message.take_slice(chunksize_good);
MDEBUG("chunk_start="<<chunk.data()<<" ptr="<<message_data<<" pos="<<(chunk.data() - message_data));
MDEBUG("part of " << message.size() << ": pos="<<(chunk.data() - message_data) << " len="<<chunk.size());
bool ok = do_send_chunk(std::move(chunk)); // <====== ***
all_ok = all_ok && ok;
if (!all_ok) {
MDEBUG("do_send() DONE ***FAILED*** from packet="<<message_size<<" B for ptr="<<message_data);
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. " << message_size);
return false; // partial failure in sending
}
// (in catch block, or uniq pointer) delete buf;
} // each chunk
MDEBUG("do_send() DONE SPLIT from packet="<<message_size<<" B for ptr="<<message_data);
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(std::move(message)); // 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(byte_slice chunk)
{
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;
double current_speed_up;
{
CRITICAL_REGION_LOCAL(m_throttle_speed_out_mutex);
m_throttle_speed_out.handle_trafic_exact(chunk.size());
current_speed_up = m_throttle_speed_out.get_current_speed();
}
context.m_current_speed_up = current_speed_up;
context.m_max_speed_up = std::max(context.m_max_speed_up, current_speed_up);
//_info("[sock " << socket().native_handle() << "] SEND " << cb);
context.m_last_send = time(NULL);
context.m_send_cnt += chunk.size();
//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="<<chunk.size()); // 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.push_back(std::move(chunk));
if(m_send_que.size() > 1)
{ // active operation should be in progress, nothing to do, just wait last operation callback
auto size_now = m_send_que.back().size();
MDEBUG("do_send_chunk() 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_chunk() NOW SENSD: packet="<<size_now<<" B");
if (speed_limit_is_enabled())
do_send_handler_write( m_send_que.back().data(), m_send_que.back().size() ); // (((H)))
CHECK_AND_ASSERT_MES( size_now == m_send_que.front().size(), false, "Unexpected queue size");
reset_timer(get_default_timeout(), false);
async_write(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_chunk", false);
} // do_send_chunk
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boost::posix_time::milliseconds connection<t_protocol_handler>::get_default_timeout()
{
unsigned count;
try { count = host_count(m_host); } catch (...) { count = 0; }
const unsigned shift = get_state().sock_count > AGGRESSIVE_TIMEOUT_THRESHOLD ? std::min(std::max(count, 1u) - 1, 8u) : 0;
boost::posix_time::milliseconds timeout(0);
if (m_local)
timeout = boost::posix_time::milliseconds(DEFAULT_TIMEOUT_MS_LOCAL >> shift);
else
timeout = boost::posix_time::milliseconds(DEFAULT_TIMEOUT_MS_REMOTE >> shift);
return timeout;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boost::posix_time::milliseconds connection<t_protocol_handler>::get_timeout_from_bytes_read(size_t bytes)
{
boost::posix_time::milliseconds ms = (boost::posix_time::milliseconds)(unsigned)(bytes * TIMEOUT_EXTRA_MS_PER_BYTE);
ms += m_timer.expires_from_now();
if (ms > get_default_timeout())
ms = get_default_timeout();
return ms;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
unsigned int connection<t_protocol_handler>::host_count(const std::string &host, int delta)
{
static boost::mutex hosts_mutex;
CRITICAL_REGION_LOCAL(hosts_mutex);
static std::map<std::string, unsigned int> hosts;
unsigned int &val = hosts[host];
if (delta > 0)
MTRACE("New connection from host " << host << ": " << val);
else if (delta < 0)
MTRACE("Closed connection from host " << host << ": " << val);
CHECK_AND_ASSERT_THROW_MES(delta >= 0 || val >= (unsigned)-delta, "Count would go negative");
CHECK_AND_ASSERT_THROW_MES(delta <= 0 || val <= std::numeric_limits<unsigned int>::max() - (unsigned)delta, "Count would wrap");
val += delta;
return val;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::reset_timer(boost::posix_time::milliseconds ms, bool add)
{
MTRACE("Setting " << ms << " expiry");
auto self = safe_shared_from_this();
if(!self)
{
MERROR("Resetting timer on a dead object");
return;
}
if (add)
ms += m_timer.expires_from_now();
m_timer.expires_from_now(ms);
m_timer.async_wait([=](const boost::system::error_code& ec)
{
if(ec == boost::asio::error::operation_aborted)
return;
MDEBUG(context << "connection timeout, closing");
self->close();
});
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::shutdown()
{
CRITICAL_REGION_BEGIN(m_shutdown_lock);
if (m_was_shutdown)
return true;
m_was_shutdown = true;
// Initiate graceful connection closure.
m_timer.cancel();
boost::system::error_code ignored_ec;
if (m_ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_enabled)
{
const shared_state &state = static_cast<const shared_state&>(get_state());
if (!state.stop_signal_sent)
socket_.shutdown(ignored_ec);
}
socket().shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);
if (!m_host.empty())
{
try { host_count(m_host, -1); } catch (...) { /* ignore */ }
m_host = "";
}
CRITICAL_REGION_END();
m_protocol_handler.release_protocol();
return true;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::close()
{
TRY_ENTRY();
auto self = safe_shared_from_this();
if(!self)
return false;
//_info("[sock " << socket().native_handle() << "] Que Shutdown called.");
m_timer.cancel();
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>::send_done()
{
if (m_ready_to_close)
return close();
m_ready_to_close = true;
return true;
}
//---------------------------------------------------------------------------------
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
reset_timer(get_default_timeout(), false);
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");
async_write(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_state(std::make_shared<typename connection<t_protocol_handler>::shared_state>()),
m_io_service_local_instance(new worker()),
io_service_(m_io_service_local_instance->io_service),
acceptor_(io_service_),
default_remote(),
m_stop_signal_sent(false), m_port(0),
m_threads_count(0),
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) :
m_state(std::make_shared<typename connection<t_protocol_handler>::shared_state>()),
io_service_(extarnal_io_service),
acceptor_(io_service_),
default_remote(),
m_stop_signal_sent(false), m_port(0),
m_threads_count(0),
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, ssl_options_t ssl_options)
{
TRY_ENTRY();
m_stop_signal_sent = false;
m_port = port;
m_address = address;
if (ssl_options)
m_state->configure_ssl(std::move(ssl_options));
// 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_state, m_connection_type, m_state->ssl_options().support));
acceptor_.async_accept(new_connection_->socket(),
boost::bind(&boosted_tcp_server<t_protocol_handler>::handle_accept, this,
boost::asio::placeholders::error));
return true;
}
catch (const std::exception &e)
{
MFATAL("Error starting server: " << e.what());
return false;
}
catch (...)
{
MFATAL("Error starting server");
return 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, ssl_options_t ssl_options)
{
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, std::move(ssl_options));
}
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();