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cd57a10c90
monero/contrib/epee/include/net/abstract_tcp_server2.inl
anonimal cd57a10c90
epee: abstract_tcp_server2: resolve CID 203919 (DC.WEAK_CRYPTO) 
The problem actually exists in two parts:

1. When sending chunks over a connection, if the queue size is
greater than N, the seed is predictable across every monero node.

>"If rand() is used before any calls to srand(), rand() behaves as if
it was seeded with srand(1). Each time rand() is seeded with the same seed, it
must produce the same sequence of values."

2. The CID speaks for itself: "'rand' should not be used for security-related
applications, because linear congruential algorithms are too easy to break."

*But* this is an area of contention.

One could argue that a CSPRNG is warranted in order to fully mitigate any
potential timing attacks based on crafting chunk responses. Others could argue
that the existing LCG, or even an MTG, would suffice (if properly seeded). As a
compromise, I've used an MTG with a full bit space. This should give a healthy
balance of security and speed without relying on the existing crypto library
(which I'm told might break on some systems since epee is not (shouldn't be)
dependent upon the existing crypto library).
2019-09-08 01:14:39 +00:00

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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 <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>
#include <functional>
#include <random>
#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() || remote_ep.address().is_v6(), false, "only IPv4 and IPv6 supported here");
if (remote_ep.address().is_v4())
{
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()});
}
else
{
const auto ip_{remote_ep.address().to_v6()};
return start(is_income, is_multithreaded, ipv6_network_address{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
}*/
using engine = std::mt19937;
engine rng;
std::random_device dev;
std::seed_seq::result_type rand[engine::state_size]{}; // Use complete bit space
std::generate_n(rand, engine::state_size, std::ref(dev));
std::seed_seq seed(rand, rand + engine::state_size);
rng.seed(seed);
long int ms = 250 + (rng() % 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_),
acceptor_ipv6(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_(),
new_connection_ipv6()
{
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_),
acceptor_ipv6(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_(),
new_connection_ipv6()
{
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,
uint32_t port_ipv6, const std::string& address_ipv6, bool use_ipv6, bool require_ipv4,
ssl_options_t ssl_options)
{
TRY_ENTRY();
m_stop_signal_sent = false;
m_port = port;
m_port_ipv6 = port_ipv6;
m_address = address;
m_address_ipv6 = address_ipv6;
m_use_ipv6 = use_ipv6;
m_require_ipv4 = require_ipv4;
if (ssl_options)
m_state->configure_ssl(std::move(ssl_options));
std::string ipv4_failed = "";
std::string ipv6_failed = "";
try
{
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());
// Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
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 (IPv4)");
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_ipv4, this,
boost::asio::placeholders::error));
}
catch (const std::exception &e)
{
ipv4_failed = e.what();
}
if (ipv4_failed != "")
{
MERROR("Failed to bind IPv4: " << ipv4_failed);
if (require_ipv4)
{
throw std::runtime_error("Failed to bind IPv4 (set to required)");
}
}
if (use_ipv6)
{
try
{
if (port_ipv6 == 0) port_ipv6 = port; // default arg means bind to same port as ipv4
boost::asio::ip::tcp::resolver resolver(io_service_);
boost::asio::ip::tcp::resolver::query query(address_ipv6, boost::lexical_cast<std::string>(port_ipv6), boost::asio::ip::tcp::resolver::query::canonical_name);
boost::asio::ip::tcp::endpoint endpoint = *resolver.resolve(query);
acceptor_ipv6.open(endpoint.protocol());
// Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
acceptor_ipv6.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
acceptor_ipv6.set_option(boost::asio::ip::v6_only(true));
acceptor_ipv6.bind(endpoint);
acceptor_ipv6.listen();
boost::asio::ip::tcp::endpoint binded_endpoint = acceptor_ipv6.local_endpoint();
m_port_ipv6 = binded_endpoint.port();
MDEBUG("start accept (IPv6)");
new_connection_ipv6.reset(new connection<t_protocol_handler>(io_service_, m_state, m_connection_type, m_state->ssl_options().support));
acceptor_ipv6.async_accept(new_connection_ipv6->socket(),
boost::bind(&boosted_tcp_server<t_protocol_handler>::handle_accept_ipv6, this,
boost::asio::placeholders::error));
}
catch (const std::exception &e)
{
ipv6_failed = e.what();
}
}
if (use_ipv6 && ipv6_failed != "")
{
MERROR("Failed to bind IPv6: " << ipv6_failed);
if (ipv4_failed != "")
{
throw std::runtime_error("Failed to bind IPv4 and IPv6");
}
}
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,
const std::string port_ipv6, const std::string address_ipv6, bool use_ipv6, bool require_ipv4,
ssl_options_t ssl_options)
{
uint32_t p = 0;
uint32_t p_ipv6 = 0;
if (port.size() && !string_tools::get_xtype_from_string(p, port)) {
MERROR("Failed to convert port no = " << port);
return false;
}
if (port_ipv6.size() && !string_tools::get_xtype_from_string(p_ipv6, port_ipv6)) {
MERROR("Failed to convert port no = " << port_ipv6);
return false;
}
return this->init_server(p, address, p_ipv6, address_ipv6, use_ipv6, require_ipv4, 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();
return true;
}
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)
{
assert(m_state != nullptr); // always set in constructor
m_state->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, m_port_ipv6, m_address_ipv6, m_use_ipv6, m_require_ipv4))
{
_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;
typename connection<t_protocol_handler>::shared_state *state = static_cast<typename connection<t_protocol_handler>::shared_state*>(m_state.get());
state->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>
void boosted_tcp_server<t_protocol_handler>::handle_accept_ipv4(const boost::system::error_code& e)
{
this->handle_accept(e, false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::handle_accept_ipv6(const boost::system::error_code& e)
{
this->handle_accept(e, true);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::handle_accept(const boost::system::error_code& e, bool ipv6)
{
MDEBUG("handle_accept");
boost::asio::ip::tcp::acceptor* current_acceptor = &acceptor_;
connection_ptr* current_new_connection = &new_connection_;
auto accept_function_pointer = &boosted_tcp_server<t_protocol_handler>::handle_accept_ipv4;
if (ipv6)
{
current_acceptor = &acceptor_ipv6;
current_new_connection = &new_connection_ipv6;
accept_function_pointer = &boosted_tcp_server<t_protocol_handler>::handle_accept_ipv6;
}
try
{
if (!e)
{
if (m_connection_type == e_connection_type_RPC) {
const char *ssl_message = "unknown";
switch ((*current_new_connection)->get_ssl_support())
{
case epee::net_utils::ssl_support_t::e_ssl_support_disabled: ssl_message = "disabled"; break;
case epee::net_utils::ssl_support_t::e_ssl_support_enabled: ssl_message = "enabled"; break;
case epee::net_utils::ssl_support_t::e_ssl_support_autodetect: ssl_message = "autodetection"; break;
}
MDEBUG("New server for RPC connections, SSL " << ssl_message);
(*current_new_connection)->setRpcStation(); // hopefully this is not needed actually
}
connection_ptr conn(std::move((*current_new_connection)));
(*current_new_connection).reset(new connection<t_protocol_handler>(io_service_, m_state, m_connection_type, conn->get_ssl_support()));
current_acceptor->async_accept((*current_new_connection)->socket(),
boost::bind(accept_function_pointer, this,
boost::asio::placeholders::error));
boost::asio::socket_base::keep_alive opt(true);
conn->socket().set_option(opt);
bool res;
if (default_remote.get_type_id() == net_utils::address_type::invalid)
res = conn->start(true, 1 < m_threads_count);
else
res = conn->start(true, 1 < m_threads_count, default_remote);
if (!res)
{
conn->cancel();
return;
}
conn->save_dbg_log();
return;
}
else
{
MERROR("Error in boosted_tcp_server<t_protocol_handler>::handle_accept: " << e);
}
}
catch (const std::exception &e)
{
MERROR("Exception in boosted_tcp_server<t_protocol_handler>::handle_accept: " << e.what());
}
// error path, if e or exception
assert(m_state != nullptr); // always set in constructor
_erro("Some problems at accept: " << e.message() << ", connections_count = " << m_state->sock_count);
misc_utils::sleep_no_w(100);
(*current_new_connection).reset(new connection<t_protocol_handler>(io_service_, m_state, m_connection_type, (*current_new_connection)->get_ssl_support()));
current_acceptor->async_accept((*current_new_connection)->socket(),
boost::bind(accept_function_pointer, this,
boost::asio::placeholders::error));
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::add_connection(t_connection_context& out, boost::asio::ip::tcp::socket&& sock, network_address real_remote, epee::net_utils::ssl_support_t ssl_support)
{
if(std::addressof(get_io_service()) == std::addressof(GET_IO_SERVICE(sock)))
{
connection_ptr conn(new connection<t_protocol_handler>(std::move(sock), m_state, m_connection_type, ssl_support));
if(conn->start(false, 1 < m_threads_count, std::move(real_remote)))
{
conn->get_context(out);
conn->save_dbg_log();
return true;
}
}
else
{
MWARNING(out << " was not added, socket/io_service mismatch");
}
return false;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
typename boosted_tcp_server<t_protocol_handler>::try_connect_result_t boosted_tcp_server<t_protocol_handler>::try_connect(connection_ptr new_connection_l, const std::string& adr, const std::string& port, boost::asio::ip::tcp::socket &sock_, const boost::asio::ip::tcp::endpoint &remote_endpoint, const std::string &bind_ip, uint32_t conn_timeout, epee::net_utils::ssl_support_t ssl_support)
{
TRY_ENTRY();
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(bind_ip.c_str()), 0);
boost::system::error_code ec;
sock_.bind(local_endpoint, ec);
if (ec)
{
MERROR("Error binding to " << bind_ip << ": " << ec.message());
if (sock_.is_open())
sock_.close();
return CONNECT_FAILURE;
}
}
/*
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 CONNECT_FAILURE;
}
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 CONNECT_FAILURE;
}
}
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 CONNECT_FAILURE;
}
_dbg3("Connected success to " << adr << ':' << port);
const ssl_support_t ssl_support = new_connection_l->get_ssl_support();
if (ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_enabled || ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_autodetect)
{
// Handshake
MDEBUG("Handshaking SSL...");
if (!new_connection_l->handshake(boost::asio::ssl::stream_base::client))
{
if (ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_autodetect)
{
boost::system::error_code ignored_ec;
sock_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);
sock_.close();
return CONNECT_NO_SSL;
}
MERROR("SSL handshake failed");
if (sock_.is_open())
sock_.close();
return CONNECT_FAILURE;
}
}
return CONNECT_SUCCESS;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::try_connect", CONNECT_FAILURE);
}
//---------------------------------------------------------------------------------
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, epee::net_utils::ssl_support_t ssl_support)
{
TRY_ENTRY();
connection_ptr new_connection_l(new connection<t_protocol_handler>(io_service_, m_state, m_connection_type, ssl_support) );
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();
bool try_ipv6 = false;
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::system::error_code resolve_error;
boost::asio::ip::tcp::resolver::iterator iterator;
try
{
//resolving ipv4 address as ipv6 throws, catch here and move on
iterator = resolver.resolve(query, resolve_error);
}
catch (const boost::system::system_error& e)
{
if (!m_use_ipv6 || (resolve_error != boost::asio::error::host_not_found &&
resolve_error != boost::asio::error::host_not_found_try_again))
{
throw;
}
try_ipv6 = true;
}
catch (...)
{
throw;
}
std::string bind_ip_to_use;
boost::asio::ip::tcp::resolver::iterator end;
if(iterator == end)
{
if (!m_use_ipv6)
{
_erro("Failed to resolve " << adr);
return false;
}
else
{
try_ipv6 = true;
MINFO("Resolving address as IPv4 failed, trying IPv6");
}
}
else
{
bind_ip_to_use = bind_ip;
}
if (try_ipv6)
{
boost::asio::ip::tcp::resolver::query query6(boost::asio::ip::tcp::v6(), adr, port, boost::asio::ip::tcp::resolver::query::canonical_name);
iterator = resolver.resolve(query6, resolve_error);
if(iterator == end)
{
_erro("Failed to resolve " << adr);
return false;
}
else
{
if (bind_ip == "0.0.0.0")
{
bind_ip_to_use = "::";
}
else
{
bind_ip_to_use = "";
}
}
}
LOG_ERROR("Trying connect to " << adr << ":" << port << ", bind_ip = " << bind_ip_to_use);
//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);
auto try_connect_result = try_connect(new_connection_l, adr, port, sock_, remote_endpoint, bind_ip_to_use, conn_timeout, ssl_support);
if (try_connect_result == CONNECT_FAILURE)
return false;
if (ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_autodetect && try_connect_result == CONNECT_NO_SSL)
{
// we connected, but could not connect with SSL, try without
MERROR("SSL handshake failed on an autodetect connection, reconnecting without SSL");
new_connection_l->disable_ssl();
try_connect_result = try_connect(new_connection_l, adr, port, sock_, remote_endpoint, bind_ip_to_use, conn_timeout, epee::net_utils::ssl_support_t::e_ssl_support_disabled);
if (try_connect_result != CONNECT_SUCCESS)
return false;
}
// 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
{
assert(m_state != nullptr); // always set in constructor
_erro("[sock " << new_connection_l->socket().native_handle() << "] Failed to start connection, connections_count = " << m_state->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, const t_callback &cb, const std::string& bind_ip, epee::net_utils::ssl_support_t ssl_support)
{
TRY_ENTRY();
connection_ptr new_connection_l(new connection<t_protocol_handler>(io_service_, m_state, m_connection_type, ssl_support) );
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();
bool try_ipv6 = false;
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::system::error_code resolve_error;
boost::asio::ip::tcp::resolver::iterator iterator;
try
{
//resolving ipv4 address as ipv6 throws, catch here and move on
iterator = resolver.resolve(query, resolve_error);
}
catch (const boost::system::system_error& e)
{
if (!m_use_ipv6 || (resolve_error != boost::asio::error::host_not_found &&
resolve_error != boost::asio::error::host_not_found_try_again))
{
throw;
}
try_ipv6 = true;
}
catch (...)
{
throw;
}
boost::asio::ip::tcp::resolver::iterator end;
if(iterator == end)
{
if (!try_ipv6)
{
_erro("Failed to resolve " << adr);
return false;
}
else
{
MINFO("Resolving address as IPv4 failed, trying IPv6");
}
}
if (try_ipv6)
{
boost::asio::ip::tcp::resolver::query query6(boost::asio::ip::tcp::v6(), adr, port, boost::asio::ip::tcp::resolver::query::canonical_name);
iterator = resolver.resolve(query6, resolve_error);
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(bind_ip.c_str()), 0);
boost::system::error_code ec;
sock_.bind(local_endpoint, ec);
if (ec)
{
MERROR("Error binding to " << bind_ip << ": " << ec.message());
if (sock_.is_open())
sock_.close();
return false;
}
}
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
PRAGMA_WARNING_POP
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