diff options
Diffstat (limited to 'contrib/epee/include/net/abstract_tcp_server2.inl')
| -rw-r--r-- | contrib/epee/include/net/abstract_tcp_server2.inl | 1708 |
1 files changed, 953 insertions, 755 deletions
diff --git a/contrib/epee/include/net/abstract_tcp_server2.inl b/contrib/epee/include/net/abstract_tcp_server2.inl index 0c3b457bc..81aa725d1 100644 --- a/contrib/epee/include/net/abstract_tcp_server2.inl +++ b/contrib/epee/include/net/abstract_tcp_server2.inl @@ -76,859 +76,1057 @@ namespace net_utils /************************************************************************/ /* */ /************************************************************************/ - 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<typename T> + unsigned int connection<T>::host_count(int delta) { + static std::mutex hosts_mutex; + std::lock_guard<std::mutex> guard(hosts_mutex); + static std::map<std::string, unsigned int> hosts; + unsigned int &val = hosts[m_host]; + if (delta > 0) + MTRACE("New connection from host " << m_host << ": " << val); + else if (delta < 0) + MTRACE("Closed connection from host " << m_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> - 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) + template<typename T> + typename connection<T>::duration_t connection<T>::get_default_timeout() { - MDEBUG("test, connection constructor set m_connection_type="<<m_connection_type); + unsigned count{}; + try { count = host_count(); } catch (...) {} + const unsigned shift = ( + connection_basic::get_state().sock_count > AGGRESSIVE_TIMEOUT_THRESHOLD ? + std::min(std::max(count, 1u) - 1, 8u) : + 0 + ); + return ( + m_local ? + std::chrono::milliseconds(DEFAULT_TIMEOUT_MS_LOCAL >> shift) : + std::chrono::milliseconds(DEFAULT_TIMEOUT_MS_REMOTE >> shift) + ); } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - connection<t_protocol_handler>::~connection() noexcept(false) + template<typename T> + typename connection<T>::duration_t connection<T>::get_timeout_from_bytes_read(size_t bytes) const { - if(!m_was_shutdown) - { - _dbg3("[sock " << socket().native_handle() << "] Socket destroyed without shutdown."); - shutdown(); - } - - _dbg3("[sock " << socket().native_handle() << "] Socket destroyed"); + return std::chrono::duration_cast<connection<T>::duration_t>( + std::chrono::duration<double, std::chrono::milliseconds::period>( + bytes * TIMEOUT_EXTRA_MS_PER_BYTE + ) + ); } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - boost::shared_ptr<connection<t_protocol_handler> > connection<t_protocol_handler>::safe_shared_from_this() + + template<typename T> + void connection<T>::state_status_check() { - 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> >(); + switch (m_state.status) + { + case status_t::RUNNING: + interrupt(); + break; + case status_t::INTERRUPTED: + on_interrupted(); + break; + case status_t::TERMINATING: + on_terminating(); + break; + default: + break; } } - //--------------------------------------------------------------------------------- - 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) + template<typename T> + void connection<T>::start_timer(duration_t duration, bool add) { - 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; + if (m_state.timers.general.wait_expire) { + m_state.timers.general.cancel_expire = true; + m_state.timers.general.reset_expire = true; + ec_t ec; + m_timers.general.expires_from_now( + std::min( + duration + (add ? m_timers.general.expires_from_now() : duration_t{}), + get_default_timeout() + ), + ec + ); + } + else { + ec_t ec; + m_timers.general.expires_from_now( + std::min( + duration + (add ? m_timers.general.expires_from_now() : duration_t{}), + get_default_timeout() + ), + ec + ); + async_wait_timer(); } - - 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_), - strand_.wrap( - std::bind(&connection<t_protocol_handler>::handle_receive, self, - std::placeholders::_1, - std::placeholders::_2))); - else - async_read_some(boost::asio::buffer(buffer_), - strand_.wrap( - std::bind(&connection<t_protocol_handler>::handle_read, self, - std::placeholders::_1, - std::placeholders::_2))); -#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() + template<typename T> + void connection<T>::async_wait_timer() { - return GET_IO_SERVICE(socket()); + if (m_state.timers.general.wait_expire) + return; + m_state.timers.general.wait_expire = true; + auto self = connection<T>::shared_from_this(); + m_timers.general.async_wait([this, self](const ec_t & ec){ + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.timers.general.wait_expire = false; + if (m_state.timers.general.cancel_expire) { + m_state.timers.general.cancel_expire = false; + if (m_state.timers.general.reset_expire) { + m_state.timers.general.reset_expire = false; + async_wait_timer(); + } + else if (m_state.status == status_t::INTERRUPTED) + on_interrupted(); + else if (m_state.status == status_t::TERMINATING) + on_terminating(); + } + else if (m_state.status == status_t::RUNNING) + interrupt(); + else if (m_state.status == status_t::INTERRUPTED) + terminate(); + }); } - //--------------------------------------------------------------------------------- - 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); - ++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() + template<typename T> + void connection<T>::cancel_timer() { - 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()); + if (!m_state.timers.general.wait_expire) + return; + m_state.timers.general.cancel_expire = true; + m_state.timers.general.reset_expire = false; + ec_t ec; + m_timers.general.cancel(ec); } - //--------------------------------------------------------------------------------- - 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) + template<typename T> + void connection<T>::start_handshake() { - TRY_ENTRY(); - //_info("[sock " << socket().native_handle() << "] Async read calledback."); - - if (m_was_shutdown) - return; + if (m_state.socket.wait_handshake) + return; + static_assert( + epee::net_utils::get_ssl_magic_size() <= sizeof(m_state.data.read.buffer), + "" + ); + auto self = connection<T>::shared_from_this(); + if (!m_state.ssl.forced && !m_state.ssl.detected) { + m_state.socket.wait_read = true; + boost::asio::async_read( + connection_basic::socket_.next_layer(), + boost::asio::buffer( + m_state.data.read.buffer.data(), + m_state.data.read.buffer.size() + ), + boost::asio::transfer_exactly(epee::net_utils::get_ssl_magic_size()), + m_strand.wrap( + [this, self](const ec_t &ec, size_t bytes_transferred){ + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.socket.wait_read = false; + if (m_state.socket.cancel_read) { + m_state.socket.cancel_read = false; + state_status_check(); + } + else if (ec.value()) { + terminate(); + } + else if ( + !epee::net_utils::is_ssl( + static_cast<const unsigned char *>( + m_state.data.read.buffer.data() + ), + bytes_transferred + ) + ) { + m_state.ssl.enabled = false; + m_state.socket.handle_read = true; + connection_basic::strand_.post( + [this, self, bytes_transferred]{ + bool success = m_handler.handle_recv( + reinterpret_cast<char *>(m_state.data.read.buffer.data()), + bytes_transferred + ); + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.socket.handle_read = false; + if (m_state.status == status_t::INTERRUPTED) + on_interrupted(); + else if (m_state.status == status_t::TERMINATING) + on_terminating(); + else if (!success) + interrupt(); + else { + start_read(); + } + } + ); + } + else { + m_state.ssl.detected = true; + start_handshake(); + } + } + ) + ); + return; + } - 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 ); - } - - if (m_was_shutdown) - return; - - delay *= 0.5; - long int ms = (long int)(delay * 100); - if (ms > 0) { - 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 - m_want_close_connection = true; - 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."); + m_state.socket.wait_handshake = true; + auto on_handshake = [this, self](const ec_t &ec, size_t bytes_transferred){ + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.socket.wait_handshake = false; + if (m_state.socket.cancel_handshake) { + m_state.socket.cancel_handshake = false; + state_status_check(); } - }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 if (ec.value()) { + ec_t ec; + connection_basic::socket_.next_layer().shutdown( + socket_t::shutdown_both, + ec + ); + connection_basic::socket_.next_layer().close(ec); + m_state.socket.connected = false; + interrupt(); } - else - { - _dbg3("[sock " << socket().native_handle() << "] peer closed connection"); - bool do_shutdown = false; - CRITICAL_REGION_BEGIN(m_send_que_lock); - if(!m_send_que.size()) - do_shutdown = true; - CRITICAL_REGION_END(); - if (m_ready_to_close || do_shutdown) - shutdown(); + else { + m_state.ssl.handshaked = true; + start_write(); + start_read(); } - 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()); + }; + const auto handshake = handshake_t::server; + static_cast<shared_state&>( + connection_basic::get_state() + ).ssl_options().configure(connection_basic::socket_, handshake); + m_strand.post( + [this, self, on_handshake]{ + connection_basic::socket_.async_handshake( + handshake, + boost::asio::buffer( + m_state.data.read.buffer.data(), + m_state.ssl.forced ? 0 : + epee::net_utils::get_ssl_magic_size() + ), + m_strand.wrap(on_handshake) + ); + } + ); } - //--------------------------------------------------------------------------------- - 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 (m_was_shutdown) return; - - if (e) - { - // offload the error case - handle_read(e, bytes_transferred); + template<typename T> + void connection<T>::start_read() + { + if (m_state.timers.throttle.in.wait_expire || m_state.socket.wait_read || + m_state.socket.handle_read + ) { return; } + auto self = connection<T>::shared_from_this(); + if (m_connection_type != e_connection_type_RPC) { + auto calc_duration = []{ + CRITICAL_REGION_LOCAL( + network_throttle_manager_t::m_lock_get_global_throttle_in + ); + return std::chrono::duration_cast<connection<T>::duration_t>( + std::chrono::duration<double, std::chrono::seconds::period>( + std::min( + network_throttle_manager_t::get_global_throttle_in( + ).get_sleep_time_after_tick(1), + 1.0 + ) + ) + ); + }; + const auto duration = calc_duration(); + if (duration > duration_t{}) { + ec_t ec; + m_timers.throttle.in.expires_from_now(duration, ec); + m_state.timers.throttle.in.wait_expire = true; + m_timers.throttle.in.async_wait([this, self](const ec_t &ec){ + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.timers.throttle.in.wait_expire = false; + if (m_state.timers.throttle.in.cancel_expire) { + m_state.timers.throttle.in.cancel_expire = false; + state_status_check(); + } + else if (ec.value()) + interrupt(); + else + start_read(); + }); + return; + } + } + m_state.socket.wait_read = true; + auto on_read = [this, self](const ec_t &ec, size_t bytes_transferred){ + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.socket.wait_read = false; + if (m_state.socket.cancel_read) { + m_state.socket.cancel_read = false; + state_status_check(); + } + else if (ec.value()) + terminate(); + else { + { + m_state.stat.in.throttle.handle_trafic_exact(bytes_transferred); + const auto speed = m_state.stat.in.throttle.get_current_speed(); + m_conn_context.m_current_speed_down = speed; + m_conn_context.m_max_speed_down = std::max( + m_conn_context.m_max_speed_down, + speed + ); + { + CRITICAL_REGION_LOCAL( + network_throttle_manager_t::m_lock_get_global_throttle_in + ); + network_throttle_manager_t::get_global_throttle_in( + ).handle_trafic_exact(bytes_transferred); + } + connection_basic::logger_handle_net_read(bytes_transferred); + m_conn_context.m_last_recv = time(NULL); + m_conn_context.m_recv_cnt += bytes_transferred; + start_timer(get_timeout_from_bytes_read(bytes_transferred), true); + } - buffer_ssl_init_fill += bytes_transferred; - MTRACE("we now have " << buffer_ssl_init_fill << "/" << get_ssl_magic_size() << " bytes needed to detect SSL"); - 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), - 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))); + // Post handle_recv to a separate `strand_`, distinct from `m_strand` + // which is listening for reads/writes. This avoids a circular dep. + // handle_recv can queue many writes, and `m_strand` will process those + // writes until the connection terminates without deadlocking waiting + // for handle_recv. + m_state.socket.handle_read = true; + connection_basic::strand_.post( + [this, self, bytes_transferred]{ + bool success = m_handler.handle_recv( + reinterpret_cast<char *>(m_state.data.read.buffer.data()), + bytes_transferred + ); + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.socket.handle_read = false; + if (m_state.status == status_t::INTERRUPTED) + on_interrupted(); + else if (m_state.status == status_t::TERMINATING) + on_terminating(); + else if (!success) + interrupt(); + else { + start_read(); + } + } + ); + } + }; + if (!m_state.ssl.enabled) + connection_basic::socket_.next_layer().async_read_some( + boost::asio::buffer( + m_state.data.read.buffer.data(), + m_state.data.read.buffer.size() + ), + m_strand.wrap(on_read) + ); + else + m_strand.post( + [this, self, on_read]{ + connection_basic::socket_.async_read_some( + boost::asio::buffer( + m_state.data.read.buffer.data(), + m_state.data.read.buffer.size() + ), + m_strand.wrap(on_read) + ); + } + ); + } + + template<typename T> + void connection<T>::start_write() + { + if (m_state.timers.throttle.out.wait_expire || m_state.socket.wait_write || + m_state.data.write.queue.empty() || + (m_state.ssl.enabled && !m_state.ssl.handshaked) + ) { return; } + auto self = connection<T>::shared_from_this(); + if (m_connection_type != e_connection_type_RPC) { + auto calc_duration = [this]{ + CRITICAL_REGION_LOCAL( + network_throttle_manager_t::m_lock_get_global_throttle_out + ); + return std::chrono::duration_cast<connection<T>::duration_t>( + std::chrono::duration<double, std::chrono::seconds::period>( + std::min( + network_throttle_manager_t::get_global_throttle_out( + ).get_sleep_time_after_tick( + m_state.data.write.queue.back().size() + ), + 1.0 + ) + ) + ); + }; + const auto duration = calc_duration(); + if (duration > duration_t{}) { + ec_t ec; + m_timers.throttle.out.expires_from_now(duration, ec); + m_state.timers.throttle.out.wait_expire = true; + m_timers.throttle.out.async_wait([this, self](const ec_t &ec){ + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.timers.throttle.out.wait_expire = false; + if (m_state.timers.throttle.out.cancel_expire) { + m_state.timers.throttle.out.cancel_expire = false; + state_status_check(); + } + else if (ec.value()) + interrupt(); + else + start_write(); + }); + } + } - // 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 + m_state.socket.wait_write = true; + auto on_write = [this, self](const ec_t &ec, size_t bytes_transferred){ + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.socket.wait_write = false; + if (m_state.socket.cancel_write) { + m_state.socket.cancel_write = false; + m_state.data.write.queue.clear(); + state_status_check(); } - 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 + else if (ec.value()) { + m_state.data.write.queue.clear(); + interrupt(); } - } + else { + { + m_state.stat.out.throttle.handle_trafic_exact(bytes_transferred); + const auto speed = m_state.stat.out.throttle.get_current_speed(); + m_conn_context.m_current_speed_up = speed; + m_conn_context.m_max_speed_down = std::max( + m_conn_context.m_max_speed_down, + speed + ); + { + CRITICAL_REGION_LOCAL( + network_throttle_manager_t::m_lock_get_global_throttle_out + ); + network_throttle_manager_t::get_global_throttle_out( + ).handle_trafic_exact(bytes_transferred); + } + connection_basic::logger_handle_net_write(bytes_transferred); + m_conn_context.m_last_send = time(NULL); + m_conn_context.m_send_cnt += bytes_transferred; - if (m_ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_enabled) - { - // Handshake - if (!handshake(boost::asio::ssl::stream_base::server, boost::asio::const_buffer(buffer_.data(), buffer_ssl_init_fill))) - { - MERROR("SSL handshake failed"); - m_want_close_connection = true; - m_ready_to_close = true; - 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; + start_timer(get_default_timeout(), true); + } + assert(bytes_transferred == m_state.data.write.queue.back().size()); + m_state.data.write.queue.pop_back(); + m_state.condition.notify_all(); + start_write(); } - } + }; + if (!m_state.ssl.enabled) + boost::asio::async_write( + connection_basic::socket_.next_layer(), + boost::asio::buffer( + m_state.data.write.queue.back().data(), + m_state.data.write.queue.back().size() + ), + m_strand.wrap(on_write) + ); else - { - handle_read(e, buffer_ssl_init_fill); - return; - } + m_strand.post( + [this, self, on_write]{ + boost::asio::async_write( + connection_basic::socket_, + boost::asio::buffer( + m_state.data.write.queue.back().data(), + m_state.data.write.queue.back().size() + ), + m_strand.wrap(on_write) + ); + } + ); + } - 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<typename T> + void connection<T>::start_shutdown() + { + if (m_state.socket.wait_shutdown) + return; + auto self = connection<T>::shared_from_this(); + m_state.socket.wait_shutdown = true; + auto on_shutdown = [this, self](const ec_t &ec){ + std::lock_guard<std::mutex> guard(m_state.lock); + m_state.socket.wait_shutdown = false; + if (m_state.socket.cancel_shutdown) { + m_state.socket.cancel_shutdown = false; + switch (m_state.status) + { + case status_t::RUNNING: + interrupt(); + break; + case status_t::INTERRUPTED: + terminate(); + break; + case status_t::TERMINATING: + on_terminating(); + break; + default: + break; + } + } + else if (ec.value()) + terminate(); + else { + cancel_timer(); + on_interrupted(); + } + }; + m_strand.post( + [this, self, on_shutdown]{ + connection_basic::socket_.async_shutdown( + m_strand.wrap(on_shutdown) + ); + } + ); + start_timer(get_default_timeout()); } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - bool connection<t_protocol_handler>::call_run_once_service_io() + + template<typename T> + void connection<T>::cancel_socket() { - 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); + bool wait_socket = false; + if (m_state.socket.wait_handshake) + wait_socket = m_state.socket.cancel_handshake = true; + if (m_state.timers.throttle.in.wait_expire) { + m_state.timers.throttle.in.cancel_expire = true; + ec_t ec; + m_timers.throttle.in.cancel(ec); + } + if (m_state.socket.wait_read) + wait_socket = m_state.socket.cancel_read = true; + if (m_state.timers.throttle.out.wait_expire) { + m_state.timers.throttle.out.cancel_expire = true; + ec_t ec; + m_timers.throttle.out.cancel(ec); + } + if (m_state.socket.wait_write) + wait_socket = m_state.socket.cancel_write = true; + if (m_state.socket.wait_shutdown) + wait_socket = m_state.socket.cancel_shutdown = true; + if (wait_socket) { + ec_t ec; + connection_basic::socket_.next_layer().cancel(ec); } - - 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="<<(const void*)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="<<(void*)chunk.data()<<" ptr="<<(const void*)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="<<(const void*)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 + template<typename T> + void connection<T>::cancel_handler() + { + if (m_state.protocol.released || m_state.protocol.wait_release) + return; + m_state.protocol.wait_release = true; + m_state.lock.unlock(); + m_handler.release_protocol(); + m_state.lock.lock(); + m_state.protocol.wait_release = false; + m_state.protocol.released = true; + if (m_state.status == status_t::INTERRUPTED) + on_interrupted(); + else if (m_state.status == status_t::TERMINATING) + on_terminating(); + } - MDEBUG("do_send() DONE SPLIT from packet="<<message_size<<" B for ptr="<<(const void*)message_data); + template<typename T> + void connection<T>::interrupt() + { + if (m_state.status != status_t::RUNNING) + return; + m_state.status = status_t::INTERRUPTED; + cancel_timer(); + cancel_socket(); + on_interrupted(); + m_state.condition.notify_all(); + cancel_handler(); + } - MDEBUG("do_send() m_connection_type = " << m_connection_type); + template<typename T> + void connection<T>::on_interrupted() + { + assert(m_state.status == status_t::INTERRUPTED); + if (m_state.timers.general.wait_expire) + return; + if (m_state.socket.wait_handshake) + return; + if (m_state.timers.throttle.in.wait_expire) + return; + if (m_state.socket.wait_read) + return; + if (m_state.socket.handle_read) + return; + if (m_state.timers.throttle.out.wait_expire) + return; + if (m_state.socket.wait_write) + return; + if (m_state.socket.wait_shutdown) + return; + if (m_state.protocol.wait_init) + return; + if (m_state.protocol.wait_callback) + return; + if (m_state.protocol.wait_release) + return; + if (m_state.socket.connected) { + if (!m_state.ssl.enabled) { + ec_t ec; + connection_basic::socket_.next_layer().shutdown( + socket_t::shutdown_both, + ec + ); + connection_basic::socket_.next_layer().close(ec); + m_state.socket.connected = false; + m_state.status = status_t::WASTED; + } + else + start_shutdown(); + } + else + m_state.status = status_t::WASTED; + } - 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 - } + template<typename T> + void connection<T>::terminate() + { + if (m_state.status != status_t::RUNNING && + m_state.status != status_t::INTERRUPTED + ) + return; + m_state.status = status_t::TERMINATING; + cancel_timer(); + cancel_socket(); + on_terminating(); + m_state.condition.notify_all(); + cancel_handler(); + } - CATCH_ENTRY_L0("connection<t_protocol_handler>::do_send", false); - } // do_send() + template<typename T> + void connection<T>::on_terminating() + { + assert(m_state.status == status_t::TERMINATING); + if (m_state.timers.general.wait_expire) + return; + if (m_state.socket.wait_handshake) + return; + if (m_state.timers.throttle.in.wait_expire) + return; + if (m_state.socket.wait_read) + return; + if (m_state.socket.handle_read) + return; + if (m_state.timers.throttle.out.wait_expire) + return; + if (m_state.socket.wait_write) + return; + if (m_state.socket.wait_shutdown) + return; + if (m_state.protocol.wait_init) + return; + if (m_state.protocol.wait_callback) + return; + if (m_state.protocol.wait_release) + return; + if (m_state.socket.connected) { + ec_t ec; + connection_basic::socket_.next_layer().shutdown( + socket_t::shutdown_both, + ec + ); + connection_basic::socket_.next_layer().close(ec); + m_state.socket.connected = false; + } + m_state.status = status_t::WASTED; + } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - bool connection<t_protocol_handler>::do_send_chunk(byte_slice chunk) + template<typename T> + bool connection<T>::send(epee::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) + std::lock_guard<std::mutex> guard(m_state.lock); + if (m_state.status != status_t::RUNNING || m_state.socket.wait_handshake) 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 - }*/ + // Wait for the write queue to fall below the max. If it doesn't after a + // randomized delay, drop the connection. + auto wait_consume = [this] { + auto random_delay = []{ using engine = std::mt19937; - - engine rng; std::random_device dev; - std::seed_seq::result_type rand[engine::state_size]{}; // Use complete bit space - + 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 (m_was_shutdown) - return false; - - 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; + engine rng(seed); + return std::chrono::milliseconds( + std::uniform_int_distribution<>(5000, 6000)(rng) + ); + }; + if (m_state.data.write.queue.size() <= ABSTRACT_SERVER_SEND_QUE_MAX_COUNT) + return true; + m_state.data.write.wait_consume = true; + bool success = m_state.condition.wait_for( + m_state.lock, + random_delay(), + [this]{ + return ( + m_state.status != status_t::RUNNING || + m_state.data.write.queue.size() <= + ABSTRACT_SERVER_SEND_QUE_MAX_COUNT + ); + } + ); + m_state.data.write.wait_consume = false; + if (!success) { + terminate(); + return false; + } + else + return m_state.status == status_t::RUNNING; + }; + auto wait_sender = [this] { + m_state.condition.wait( + m_state.lock, + [this] { + return ( + m_state.status != status_t::RUNNING || + !m_state.data.write.wait_consume + ); } + ); + return m_state.status == status_t::RUNNING; + }; + if (!wait_sender()) + return false; + constexpr size_t CHUNK_SIZE = 32 * 1024; + if (m_connection_type == e_connection_type_RPC || + message.size() <= 2 * CHUNK_SIZE + ) { + if (!wait_consume()) + return false; + m_state.data.write.queue.emplace_front(std::move(message)); + start_write(); } - - 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 { + while (!message.empty()) { + if (!wait_consume()) + return false; + m_state.data.write.queue.emplace_front( + message.take_slice(CHUNK_SIZE) + ); + start_write(); + } } - else - { // no active operation + m_state.condition.notify_all(); + return true; + } - if(m_send_que.size()!=1) - { - _erro("Looks like no active operations, but send que size != 1!!"); - return false; + template<typename T> + bool connection<T>::start_internal( + bool is_income, + bool is_multithreaded, + boost::optional<network_address> real_remote + ) + { + std::unique_lock<std::mutex> guard(m_state.lock); + if (m_state.status != status_t::TERMINATED) + return false; + if (!real_remote) { + ec_t ec; + auto endpoint = connection_basic::socket_.next_layer().remote_endpoint( + ec + ); + if (ec.value()) + return false; + real_remote = ( + endpoint.address().is_v6() ? + network_address{ + ipv6_network_address{endpoint.address().to_v6(), endpoint.port()} + } : + network_address{ + ipv4_network_address{ + uint32_t{ + boost::asio::detail::socket_ops::host_to_network_long( + endpoint.address().to_v4().to_ulong() + ) + }, + endpoint.port() + } } - - 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( - std::bind(&connection<t_protocol_handler>::handle_write, self, std::placeholders::_1, std::placeholders::_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 - + auto *filter = static_cast<shared_state&>( + connection_basic::get_state() + ).pfilter; + if (filter && !filter->is_remote_host_allowed(*real_remote)) + return false; + ec_t ec; + #if !defined(_WIN32) || !defined(__i686) + connection_basic::socket_.next_layer().set_option( + boost::asio::detail::socket_option::integer<IPPROTO_IP, IP_TOS>{ + connection_basic::get_tos_flag() + }, + ec + ); + if (ec.value()) + return false; + #endif + connection_basic::socket_.next_layer().set_option( + boost::asio::ip::tcp::no_delay{false}, + ec + ); + if (ec.value()) + return false; + connection_basic::m_is_multithreaded = is_multithreaded; + m_conn_context.set_details( + boost::uuids::random_generator()(), + *real_remote, + is_income, + connection_basic::m_ssl_support == ssl_support_t::e_ssl_support_enabled + ); + m_host = real_remote->host_str(); + try { host_count(1); } catch(...) { /* ignore */ } + m_local = real_remote->is_loopback() || real_remote->is_local(); + m_state.ssl.enabled = ( + connection_basic::m_ssl_support != ssl_support_t::e_ssl_support_disabled + ); + m_state.ssl.forced = ( + connection_basic::m_ssl_support == ssl_support_t::e_ssl_support_enabled + ); + m_state.socket.connected = true; + m_state.status = status_t::RUNNING; + start_timer( + std::chrono::milliseconds( + m_local ? NEW_CONNECTION_TIMEOUT_LOCAL : NEW_CONNECTION_TIMEOUT_REMOTE + ) + ); + m_state.protocol.wait_init = true; + guard.unlock(); + m_handler.after_init_connection(); + guard.lock(); + m_state.protocol.wait_init = false; + m_state.protocol.initialized = true; + if (m_state.status == status_t::INTERRUPTED) + on_interrupted(); + else if (m_state.status == status_t::TERMINATING) + on_terminating(); + else if (!is_income || !m_state.ssl.enabled) + start_read(); + else + start_handshake(); 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() + template<typename T> + connection<T>::connection( + io_context_t &io_context, + std::shared_ptr<shared_state> shared_state, + t_connection_type connection_type, + ssl_support_t ssl_support + ): + connection( + std::move(socket_t{io_context}), + std::move(shared_state), + connection_type, + ssl_support + ) { - 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) + + template<typename T> + connection<T>::connection( + socket_t &&socket, + std::shared_ptr<shared_state> shared_state, + t_connection_type connection_type, + ssl_support_t ssl_support + ): + connection_basic(std::move(socket), shared_state, ssl_support), + m_handler(this, *shared_state, m_conn_context), + m_connection_type(connection_type), + m_io_context{GET_IO_SERVICE(connection_basic::socket_)}, + m_strand{m_io_context}, + m_timers{m_io_context} { - boost::posix_time::milliseconds ms = (boost::posix_time::milliseconds)(unsigned)(bytes * TIMEOUT_EXTRA_MS_PER_BYTE); - const auto cur = m_timer.expires_from_now().total_milliseconds(); - if (cur > 0) - ms += (boost::posix_time::milliseconds)cur; - 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) + + template<typename T> + connection<T>::~connection() noexcept(false) { - 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; + std::lock_guard<std::mutex> guard(m_state.lock); + assert(m_state.status == status_t::TERMINATED || + m_state.status == status_t::WASTED || + m_io_context.stopped() + ); + if (m_state.status != status_t::WASTED) + return; + try { host_count(-1); } catch (...) { /* ignore */ } } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - void connection<t_protocol_handler>::reset_timer(boost::posix_time::milliseconds ms, bool add) + + template<typename T> + bool connection<T>::start( + bool is_income, + bool is_multithreaded + ) { - const auto tms = ms.total_milliseconds(); - if (tms < 0 || (add && tms == 0)) - { - MWARNING("Ignoring negative timeout " << ms); - return; - } - MTRACE((add ? "Adding" : "Setting") << " " << ms << " expiry"); - auto self = safe_shared_from_this(); - if(!self) - { - MERROR("Resetting timer on a dead object"); - return; - } - if (m_was_shutdown) - { - MERROR("Setting timer on a shut down object"); - return; - } - if (add) - { - const auto cur = m_timer.expires_from_now().total_milliseconds(); - if (cur > 0) - ms += (boost::posix_time::milliseconds)cur; - } - 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(); - }); + return start_internal(is_income, is_multithreaded, {}); } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - bool connection<t_protocol_handler>::shutdown() + + template<typename T> + bool connection<T>::start( + bool is_income, + bool is_multithreaded, + network_address real_remote + ) { - 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; + return start_internal(is_income, is_multithreaded, real_remote); } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - bool connection<t_protocol_handler>::close() + + template<typename T> + void connection<T>::save_dbg_log() { - 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(); - m_want_close_connection = true; - if(!send_que_size) - { - shutdown(); + std::lock_guard<std::mutex> guard(m_state.lock); + std::string address; + std::string port; + ec_t ec; + auto endpoint = connection_basic::socket().remote_endpoint(ec); + if (ec.value()) { + address = "<not connected>"; + port = "<not connected>"; } - - return true; - CATCH_ENTRY_L0("connection<t_protocol_handler>::close", false); + else { + address = endpoint.address().to_string(); + port = std::to_string(endpoint.port()); + } + MDEBUG( + " connection type " << std::to_string(m_connection_type) << + " " << connection_basic::socket().local_endpoint().address().to_string() << + ":" << connection_basic::socket().local_endpoint().port() << + " <--> " << m_conn_context.m_remote_address.str() << + " (via " << address << ":" << port << ")" + ); } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - bool connection<t_protocol_handler>::send_done() + + template<typename T> + bool connection<T>::speed_limit_is_enabled() const { - if (m_ready_to_close) - return close(); - m_ready_to_close = true; - return true; + return m_connection_type != e_connection_type_RPC; } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - bool connection<t_protocol_handler>::cancel() + + template<typename T> + bool connection<T>::cancel() { return close(); } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - void connection<t_protocol_handler>::handle_write(const boost::system::error_code& e, size_t cb) + + template<typename T> + bool connection<T>::do_send(byte_slice message) { - TRY_ENTRY(); - LOG_TRACE_CC(context, "[sock " << socket().native_handle() << "] Async send calledback " << cb); + return send(std::move(message)); + } - if (e) - { - _dbg1("[sock " << socket().native_handle() << "] Some problems at write: " << e.message() << ':' << e.value()); - shutdown(); - return; - } - logger_handle_net_write(cb); + template<typename T> + bool connection<T>::send_done() + { + return true; + } - // The single sleeping that is needed for correctly handling "out" speed throttling - if (speed_limit_is_enabled()) { - sleep_before_packet(cb, 1, 1); - } + template<typename T> + bool connection<T>::close() + { + std::lock_guard<std::mutex> guard(m_state.lock); + if (m_state.status != status_t::RUNNING) + return false; + terminate(); + return true; + } - 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; + template<typename T> + bool connection<T>::call_run_once_service_io() + { + if(connection_basic::m_is_multithreaded) { + if (!m_io_context.poll_one()) + misc_utils::sleep_no_w(1); } - - m_send_que.pop_front(); - if(m_send_que.empty()) - { - if(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( - std::bind(&connection<t_protocol_handler>::handle_write, connection<t_protocol_handler>::shared_from_this(), std::placeholders::_1, std::placeholders::_2) - ) - ); - //_dbg3("(normal)" << size_now); + else { + if (!m_io_context.run_one()) + return false; } - CRITICAL_REGION_END(); + return true; + } - if(do_shutdown) - { - shutdown(); - } - CATCH_ENTRY_L0("connection<t_protocol_handler>::handle_write", void()); + template<typename T> + bool connection<T>::request_callback() + { + std::lock_guard<std::mutex> guard(m_state.lock); + if (m_state.status != status_t::RUNNING) + return false; + auto self = connection<T>::shared_from_this(); + ++m_state.protocol.wait_callback; + connection_basic::strand_.post([this, self]{ + m_handler.handle_qued_callback(); + std::lock_guard<std::mutex> guard(m_state.lock); + --m_state.protocol.wait_callback; + if (m_state.status == status_t::INTERRUPTED) + on_interrupted(); + else if (m_state.status == status_t::TERMINATING) + on_terminating(); + }); + return true; } - //--------------------------------------------------------------------------------- - template<class t_protocol_handler> - void connection<t_protocol_handler>::setRpcStation() + template<typename T> + typename connection<T>::io_context_t &connection<T>::get_io_service() { - m_connection_type = e_connection_type_RPC; - MDEBUG("set m_connection_type = RPC "); + return m_io_context; } + template<typename T> + bool connection<T>::add_ref() + { + try { + auto self = connection<T>::shared_from_this(); + std::lock_guard<std::mutex> guard(m_state.lock); + this->self = std::move(self); + ++m_state.protocol.reference_counter; + return true; + } + catch (boost::bad_weak_ptr &exception) { + return false; + } + } - template<class t_protocol_handler> - bool connection<t_protocol_handler>::speed_limit_is_enabled() const { - return m_connection_type != e_connection_type_RPC ; - } + template<typename T> + bool connection<T>::release() + { + connection_ptr self; + std::lock_guard<std::mutex> guard(m_state.lock); + if (!(--m_state.protocol.reference_counter)) + self = std::move(this->self); + return true; + } - /************************************************************************/ - /* */ - /************************************************************************/ + template<typename T> + void connection<T>::setRpcStation() + { + std::lock_guard<std::mutex> guard(m_state.lock); + 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 ) : |