869 lines
33 KiB
C++
869 lines
33 KiB
C++
#pragma once
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#include <asio/any_completion_handler.hpp>
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#include <asio/basic_datagram_socket.hpp>
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#include <asio/basic_seq_packet_socket.hpp>
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#include <asio/basic_stream_socket.hpp>
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#include <asio/bind_executor.hpp>
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#include <asio/compose.hpp>
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#include <asio/deferred.hpp>
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#include <asio/ip/tcp.hpp>
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#include <asio/ip/udp.hpp>
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#include <asio/local/datagram_protocol.hpp>
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#include <asio/local/seq_packet_protocol.hpp>
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#include <asio/local/stream_protocol.hpp>
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#include <asio/read.hpp>
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#include <asio/read_until.hpp>
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#include <asio/steady_timer.hpp>
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#include <asio/strand.hpp>
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#include <asio/streambuf.hpp>
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#include <asio/use_awaitable.hpp>
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#include <asio/use_future.hpp>
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#include <asio/write.hpp>
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#include <functional>
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#include <queue>
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#ifdef USE_OPENSSL_WITH_ASIO
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#include <asio/ssl.hpp>
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#include <asio/ssl/stream.hpp>
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#endif
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#include "../../common/adc_traits.h"
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#include "../adc_net_concepts.h"
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#include "../adc_netproto.h"
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namespace adc::traits
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{
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// special ASIO-related template specializations
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template <>
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struct adc_func_traits<asio::use_future_t<>> {
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using ret_t = std::nullptr_t;
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using args_t = std::tuple<std::nullptr_t, std::nullptr_t>;
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using arg1_t = std::nullptr_t;
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static constexpr size_t arity = 0;
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};
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template <>
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struct adc_func_traits<asio::use_awaitable_t<>> {
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using ret_t = std::nullptr_t;
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using args_t = std::tuple<std::nullptr_t, std::nullptr_t>;
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using arg1_t = std::nullptr_t;
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static constexpr size_t arity = 0;
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};
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template <>
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struct adc_func_traits<asio::deferred_t> {
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using ret_t = std::nullptr_t;
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using args_t = std::tuple<std::nullptr_t, std::nullptr_t>;
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using arg1_t = std::nullptr_t;
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static constexpr size_t arity = 0;
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};
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} // namespace adc::traits
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namespace adc::impl
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{
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template <typename T>
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concept adc_asio_transport_proto_c =
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std::derived_from<T, asio::ip::tcp> || std::derived_from<T, asio::ip::udp> ||
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std::derived_from<T, asio::local::seq_packet_protocol> || std::derived_from<T, asio::local::stream_protocol> ||
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std::derived_from<T, asio::local::datagram_protocol>;
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template <typename T>
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concept adc_asio_tls_transport_proto_c =
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std::derived_from<T, asio::ip::tcp> || std::derived_from<T, asio::local::stream_protocol> ||
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std::derived_from<T, asio::local::seq_packet_protocol>;
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template <typename T>
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concept adc_asio_stream_transport_proto_c =
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std::derived_from<T, asio::ip::tcp> || std::derived_from<T, asio::local::stream_protocol>;
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template <typename T>
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concept adc_asio_is_future = requires {
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// [](std::type_identity<asio::use_future_t<>>) {}(std::type_identity<std::remove_cvref_t<T>>());
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[]<typename AllocatorT>(std::type_identity<asio::use_future_t<AllocatorT>>) {
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}(std::type_identity<std::remove_cvref_t<T>>{});
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};
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template <typename T>
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concept adc_asio_is_awaitable = requires {
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[]<typename ExecutorT>(std::type_identity<asio::use_awaitable_t<ExecutorT>>) {
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}(std::type_identity<std::remove_cvref_t<T>>{});
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};
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template <typename T>
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concept adc_asio_special_comp_token_c =
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adc_asio_is_future<T> || adc_asio_is_awaitable<T> || std::same_as<std::remove_cvref_t<T>, asio::deferred_t>;
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namespace details
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{
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struct helper_struct_t {
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using asyncAcceptImplementation = std::nullptr_t;
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};
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template <typename SRVT, typename DRVT = std::nullptr_t>
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class Accpt
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{
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public:
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using netservice_t = SRVT;
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// deduce needed types
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using transport_proto_t = typename SRVT::endpoint_t::protocol_type;
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using socket_t = typename SRVT::endpoint_t::protocol_type::socket;
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using acceptor_t = std::conditional_t<std::derived_from<socket_t, asio::basic_datagram_socket<transport_proto_t>>,
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std::nullptr_t, // there is no acceptor
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typename transport_proto_t::acceptor>;
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static constexpr std::chrono::duration DEFAULT_ACCEPT_TIMEOUT = std::chrono::seconds::max();
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Accpt(asio::io_context& io_ctx, const netservice_t::endpoint_t& endpoint)
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: _ioContext(io_ctx), _acceptor(io_ctx, endpoint)
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{
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}
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template <asio::completion_token_for<void(std::error_code, netservice_t)> TokenT,
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traits::adc_time_duration_c DT = decltype(DEFAULT_ACCEPT_TIMEOUT)>
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auto asyncAccept(TokenT&& token, const DT& timeout = DEFAULT_ACCEPT_TIMEOUT)
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{
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if constexpr (std::is_null_pointer_v<acceptor_t>) {
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static_assert(false, "INVALID TRANSPORT PROTOCOL TYPE!");
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}
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auto timer = netservice_t::getDeadlineTimer(_acceptor, timeout);
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auto srv = std::make_shared<netservice_t>(_ioContext);
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// auto srv = std::make_unique<netservice_t>(_ioContext);
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if constexpr (std::same_as<DRVT, std::nullptr_t>) {
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return asio::async_compose<TokenT, void(std::error_code, netservice_t)>(
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_impl(this, _acceptor, std::move(timer), srv, true), token, _ioContext);
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} else {
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return asio::async_compose<TokenT, void(std::error_code, netservice_t)>(
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static_cast<DRVT*>(this)->_impl(this, _acceptor, std::move(timer), srv, true), token, _ioContext);
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}
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}
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template <traits::adc_time_duration_c DT = decltype(DEFAULT_ACCEPT_TIMEOUT)>
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auto accept(const DT& timeout = DEFAULT_ACCEPT_TIMEOUT)
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{
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auto f = asyncAccept(asio::use_future, timeout);
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return f.get();
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}
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protected:
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asio::io_context& _ioContext;
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acceptor_t _acceptor;
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struct asyncAcceptImplementation {
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Accpt* acp;
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acceptor_t& _acceptor;
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std::shared_ptr<asio::steady_timer> timer;
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std::shared_ptr<netservice_t> srv;
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bool start;
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void operator()(auto& self, std::error_code ec = {})
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{
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if (!ec) {
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if (start) {
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start = false;
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return _acceptor.async_accept(srv->_socket, std::move(self));
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}
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}
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if (netservice_t::isTimeout(timer, ec)) {
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ec = std::make_error_code(std::errc::timed_out);
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} else { // an error occured in async_accept
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timer->cancel();
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}
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self.complete(ec, std::move(*srv));
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}
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} _impl;
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};
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/*
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// template <interfaces::adc_netservice_c SRVT>
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template <typename SRVT>
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class AdcAcceptorASIO
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{
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public:
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using netservice_t = SRVT;
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// deduce needed types
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using transport_proto_t = typename SRVT::endpoint_t::protocol_type;
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using socket_t = typename SRVT::endpoint_t::protocol_type::socket;
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using acceptor_t = std::conditional_t<std::derived_from<socket_t, asio::basic_datagram_socket<transport_proto_t>>,
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std::nullptr_t, // there is no acceptor
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typename transport_proto_t::acceptor>;
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static constexpr std::chrono::duration DEFAULT_ACCEPT_TIMEOUT = std::chrono::seconds::max();
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AdcAcceptorASIO(asio::io_context& io_ctx, const netservice_t::endpoint_t& endpoint)
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: _ioContext(io_ctx), _acceptor(io_ctx, endpoint)
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{
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}
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AdcAcceptorASIO(const AdcAcceptorASIO& other)
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: _ioContext(other._ioContext), _acceptor(std::move(other._acceptor)) {
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};
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template <asio::completion_token_for<void(std::error_code, netservice_t)> TokenT,
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traits::adc_time_duration_c DT = decltype(DEFAULT_ACCEPT_TIMEOUT)>
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auto asyncAccept(TokenT&& token, const DT& timeout = DEFAULT_ACCEPT_TIMEOUT)
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{
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if constexpr (std::is_null_pointer_v<acceptor_t>) {
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static_assert(false, "INVALID TRANSPORT PROTOCOL TYPE!");
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}
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enum { starting, native_accept, post_accept, finishing };
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auto timer = netservice_t::getDeadlineTimer(_acceptor, timeout);
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auto srv = std::make_shared<netservice_t>(_ioContext);
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// auto srv = std::make_unique<netservice_t>(_ioContext);
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// return asio::async_compose<TokenT, void(std::error_code, netservice_t)>(
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// asyncAcceptImplementation{this, _acceptor, std::move(timer), srv, AdcAcceptorASIO::starting}, token,
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// _ioContext);
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return asio::async_compose<TokenT, void(std::error_code, netservice_t)>(
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// [timer = std::move(timer), srv = std::move(srv), state = AdcAcceptorASIO::native_accept, this](
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[timer = std::move(timer), srv, state = AdcAcceptorASIO::native_accept, this](
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auto& self, std::error_code ec = {}) mutable {
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if (!ec) {
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switch (state) {
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case starting:
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// _starting(srv, state, self);
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_starting(srv, state, std::move(self));
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return;
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break;
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case native_accept:
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// _native_accept(srv, state, self);
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_native_accept(srv, state, std::move(self));
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return;
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break;
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case post_accept:
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// _post_accept(srv, state, self);
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_post_accept(srv, state, std::move(self));
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return;
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break;
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case finishing:
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// _finishing(srv, state, self);
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_finishing(srv, state, std::move(self));
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return;
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break;
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default:
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break;
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}
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}
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if (netservice_t::isTimeout(timer, ec)) {
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ec = std::make_error_code(std::errc::timed_out);
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} else { // an error occured in async_accept
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timer->cancel();
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}
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self.complete(ec, std::move(*srv));
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},
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token, _ioContext);
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}
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template <traits::adc_time_duration_c DT = decltype(DEFAULT_ACCEPT_TIMEOUT)>
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auto accept(const DT& timeout = DEFAULT_ACCEPT_TIMEOUT)
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{
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auto f = asyncAccept(asio::use_future, timeout);
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return f.get();
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}
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protected:
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asio::io_context& _ioContext;
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acceptor_t _acceptor;
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enum state_t { starting, native_accept, post_accept, finishing };
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using self_t = std::function<void(std::error_code)>;
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// using self_t = asio::any_completion_handler<void(std::error_code)>;
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// using self_t = std::move_only_function<void(std::error_code)>;
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// typedef std::function<void(std::unique_ptr<netservice_t>&, state_t&, self_t)> stage_func_t;
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typedef std::function<void(std::shared_ptr<netservice_t>, state_t&, self_t)> stage_func_t;
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// stage_func_t _starting = [this](auto&, state_t& state, self_t self) mutable {
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stage_func_t _starting = [this](auto, state_t& state, self_t self) mutable {
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state = native_accept;
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asio::post(_ioContext, std::bind([](auto&, auto) {}, std::move(self), std::error_code{}));
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};
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// stage_func_t _native_accept = [this](auto& srv, state_t& state, self_t self) mutable {
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stage_func_t _native_accept = [this](auto srv, state_t& state, self_t self) mutable {
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state = post_accept;
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_acceptor.async_accept(srv->_socket, std::move(self));
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};
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// stage_func_t _post_accept = [this](auto&, state_t& state, self_t self) mutable { state = finishing; };
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stage_func_t _post_accept = [this](auto, state_t& state, self_t self) mutable { state = finishing; };
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// stage_func_t _finishing = [](auto&, state_t&, self_t) mutable {};
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stage_func_t _finishing = [](auto, state_t&, self_t) mutable {};
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struct asyncAcceptImplementation {
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AdcAcceptorASIO* acp;
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acceptor_t& _acceptor;
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std::shared_ptr<asio::steady_timer> timer;
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std::shared_ptr<netservice_t> srv;
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// std::unique_ptr<asio::steady_timer> timer;
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// std::unique_ptr<netservice_t> srv;
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state_t state;
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asyncAcceptImplementation(AdcAcceptorASIO* a,
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acceptor_t& ar,
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std::shared_ptr<asio::steady_timer> tm,
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std::shared_ptr<netservice_t> s,
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state_t st)
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: acp(a), _acceptor(ar), timer(tm), srv(s), state(st)
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{
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}
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asyncAcceptImplementation(const asyncAcceptImplementation& other) : _acceptor(other._acceptor)
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{
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acp = other.acp;
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timer = other.timer;
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srv = other.srv;
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state = other.state;
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}
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void operator()(auto& self, std::error_code ec = {})
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{
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if (!ec) {
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switch (state) {
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case starting:
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acp->_starting(srv, state, self);
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break;
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case native_accept:
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acp->_native_accept(srv, state, self);
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break;
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case post_accept:
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acp->_post_accept(srv, state, self);
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break;
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case finishing:
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acp->_finishing(srv, state, self);
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break;
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default:
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break;
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}
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}
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if (netservice_t::isTimeout(timer, ec)) {
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ec = std::make_error_code(std::errc::timed_out);
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} else { // an error occured in async_accept
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timer->cancel();
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}
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self.complete(ec, std::move(*srv));
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}
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};
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};
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*/
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} // namespace details
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template <adc_asio_transport_proto_c TRANSPORT_PROTOT,
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interfaces::adc_netsession_proto_c<std::string_view> SESSION_PROTOT,
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traits::adc_output_char_range RMSGT =
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std::vector<char>> // used only for inner storing of message byte sequence
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class AdcNetServiceASIOBase : public SESSION_PROTOT
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{
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public:
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// friend details::AdcAcceptorASIO<AdcNetServiceASIOBase>;
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friend details::Accpt<AdcNetServiceASIOBase>;
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// typedefs to satisfy 'adc_netservice_c' concept
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typedef std::string_view netservice_ident_t;
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typedef std::vector<char> send_msg_t; // in general, only one of several possible
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typedef RMSGT recv_msg_t; // in general, only one of several possible (see class template arguments declaration)
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typedef traits::adc_common_duration_t timeout_t;
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using endpoint_t = typename TRANSPORT_PROTOT::endpoint;
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// typedefs for completion tokens (callbacks, required by 'adc_netservice_c' concept)
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typedef std::function<void(std::error_code)> async_connect_callback_t;
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typedef std::function<void(std::error_code)> async_send_callback_t;
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typedef std::function<void(std::error_code, RMSGT)> async_receive_callback_t;
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// typedefs from transport protocol
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using socket_t = typename TRANSPORT_PROTOT::socket;
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// typedef details::AdcAcceptorASIO<AdcNetServiceASIOBase> acceptor_t;
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// typedef details::Accpt<AdcNetServiceASIOBase> acceptor_t;
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struct acceptor_t : details::Accpt<AdcNetServiceASIOBase, acceptor_t> {
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using base_t = details::Accpt<AdcNetServiceASIOBase, acceptor_t>;
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using base_t::base_t;
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protected:
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using typename base_t::netservice_t;
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struct asyncAcceptImplementation {
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acceptor_t* acp;
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typename base_t::acceptor_t& _acceptor;
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std::shared_ptr<asio::steady_timer> timer;
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std::shared_ptr<netservice_t> srv;
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bool start;
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void operator()(auto& self, std::error_code ec = {})
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{
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if (!ec) {
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if (start) {
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start = false;
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return _acceptor.async_accept(srv->_socket, std::move(self));
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}
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}
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if (netservice_t::isTimeout(timer, ec)) {
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ec = std::make_error_code(std::errc::timed_out);
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} else { // an error occured in async_accept
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timer->cancel();
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}
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self.complete(ec, std::move(*srv));
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}
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};
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};
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static constexpr std::chrono::duration DEFAULT_CONNECT_TIMEOUT = std::chrono::seconds(10);
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static constexpr std::chrono::duration DEFAULT_SEND_TIMEOUT = std::chrono::seconds(5);
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static constexpr std::chrono::duration DEFAULT_RECEIVE_TIMEOUT = std::chrono::seconds(5);
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AdcNetServiceASIOBase(asio::io_context& ctx)
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: SESSION_PROTOT(), _ioContext(ctx), _receiveStrand(_ioContext), _socket(_ioContext), _receiveQueue()
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{
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}
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AdcNetServiceASIOBase(socket_t socket)
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: SESSION_PROTOT(),
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_ioContext(static_cast<asio::io_context&>(socket.get_executor().context())),
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_socket(std::move(socket)),
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_receiveStrand(_ioContext),
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_receiveQueue()
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{
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}
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// NOTE: CANNOT MOVE asio::streambuf CORRECTLY?!!!
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// AdcNetServiceASIOBase(AdcNetServiceASIOBase&& other) = default;
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AdcNetServiceASIOBase(AdcNetServiceASIOBase&& other)
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: _ioContext(other._ioContext),
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_receiveStrand(std::move(other._receiveStrand)),
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_socket(std::move(other._socket)),
|
|
_streamBuffer(),
|
|
_receiveQueue(std::move(other._receiveQueue))
|
|
|
|
{
|
|
auto bytes = asio::buffer_copy(_streamBuffer.prepare(other._streamBuffer.size()), other._streamBuffer.data());
|
|
_streamBuffer.commit(bytes);
|
|
}
|
|
|
|
|
|
// AdcNetServiceASIOBase(AdcNetServiceASIOBase&& other) = delete;
|
|
AdcNetServiceASIOBase(const AdcNetServiceASIOBase&) = delete; // no copy constructor!
|
|
|
|
virtual ~AdcNetServiceASIOBase() {}
|
|
|
|
|
|
AdcNetServiceASIOBase& operator=(const AdcNetServiceASIOBase&) = delete;
|
|
|
|
// AdcNetServiceASIOBase& operator=(AdcNetServiceASIOBase&& other) = delete;
|
|
// AdcNetServiceASIOBase& operator=(AdcNetServiceASIOBase&& other) = default;
|
|
AdcNetServiceASIOBase& operator=(AdcNetServiceASIOBase&& other)
|
|
{
|
|
_ioContext = other._ioContext;
|
|
_receiveStrand = std::move(other._receiveStrand);
|
|
_receiveQueue = std::move(other._receiveQueue);
|
|
_socket = std::move(other._socket);
|
|
|
|
_streamBuffer.consume(_streamBuffer.size());
|
|
|
|
auto bytes = asio::buffer_copy(_streamBuffer.prepare(other._streamBuffer.size()), other._streamBuffer.data());
|
|
_streamBuffer.commit(bytes);
|
|
|
|
return *this;
|
|
};
|
|
|
|
|
|
constexpr netservice_ident_t ident() const
|
|
{
|
|
return _ident;
|
|
}
|
|
|
|
|
|
/* asynchronuos methods */
|
|
|
|
template <asio::completion_token_for<void(std::error_code)> TokenT,
|
|
traits::adc_time_duration_c TimeoutT = decltype(DEFAULT_CONNECT_TIMEOUT)>
|
|
auto asyncConnect(const endpoint_t& endpoint, TokenT&& token, const TimeoutT& timeout = DEFAULT_CONNECT_TIMEOUT)
|
|
{
|
|
auto timer = getDeadlineTimer(_socket, timeout);
|
|
|
|
return asio::async_compose<TokenT, void(std::error_code)>(
|
|
[start = true, endpoint, timer = std::move(timer), this](auto& self, std::error_code ec = {}) mutable {
|
|
if (!ec) {
|
|
if (start) {
|
|
start = false;
|
|
return _socket.async_connect(endpoint, std::move(self));
|
|
}
|
|
}
|
|
|
|
if (isTimeout(timer, ec)) {
|
|
ec = std::make_error_code(std::errc::timed_out);
|
|
} else { // an error occured in async_connect
|
|
timer->cancel();
|
|
}
|
|
|
|
self.complete(ec);
|
|
},
|
|
token, _socket);
|
|
}
|
|
|
|
|
|
template <traits::adc_input_char_range MessageT,
|
|
asio::completion_token_for<void(std::error_code ec)> TokenT,
|
|
traits::adc_time_duration_c TimeoutT = decltype(DEFAULT_SEND_TIMEOUT)>
|
|
auto asyncSend(const MessageT& msg, TokenT&& token, const TimeoutT& timeout = DEFAULT_SEND_TIMEOUT)
|
|
{
|
|
// create buffer sequence of sending session protocol representation of the input message
|
|
std::vector<asio::const_buffer> buff_seq;
|
|
// std::ranges::for_each(this->toProto(msg), [&buff_seq](const auto& el) { buff_seq.emplace_back(el); });
|
|
std::ranges::for_each(this->toProto(msg),
|
|
[&buff_seq](const auto& el) { buff_seq.emplace_back(el.data(), el.size()); });
|
|
|
|
auto timer = getDeadlineTimer(_socket, timeout);
|
|
|
|
return asio::async_compose<TokenT, void(std::error_code)>(
|
|
[start = true, buff_seq = std::move(buff_seq), timer = std::move(timer), this](
|
|
auto& self, std::error_code ec = {}, size_t = 0) mutable {
|
|
if (!ec) {
|
|
if (start) {
|
|
start = false;
|
|
if constexpr (std::derived_from<socket_t,
|
|
asio::basic_stream_socket<typename socket_t::protocol_type>>) {
|
|
return asio::async_write(_socket, buff_seq, std::move(self));
|
|
} else if constexpr (std::derived_from<socket_t, asio::basic_datagram_socket<
|
|
typename socket_t::protocol_type>>) {
|
|
return _socket.async_send(buff_seq, std::move(self));
|
|
} else if constexpr (std::derived_from<socket_t, asio::basic_seq_packet_socket<
|
|
typename socket_t::protocol_type>>) {
|
|
return _socket.async_send(buff_seq, std::move(self));
|
|
} else {
|
|
static_assert(false, "UNKNOWN ASIO-LIBRARY SOCKET TYPE!!!");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (isTimeout(timer, ec)) {
|
|
ec = std::make_error_code(std::errc::timed_out);
|
|
} else { // an error occured in async_write/async_send
|
|
timer->cancel();
|
|
}
|
|
|
|
self.complete(ec);
|
|
},
|
|
token, _socket);
|
|
}
|
|
|
|
|
|
template <typename TokenT, traits::adc_time_duration_c TimeoutT = decltype(DEFAULT_RECEIVE_TIMEOUT)>
|
|
auto asyncReceive(TokenT&& token, const TimeoutT& timeout = DEFAULT_RECEIVE_TIMEOUT)
|
|
{
|
|
// static asio::streambuf _streamBuffer;
|
|
|
|
// check completion token signature and deduce message type
|
|
// if constexpr (!adc_asio_special_comp_token_c<TokenT> && !is_async_ctx_t) {
|
|
if constexpr (!adc_asio_special_comp_token_c<TokenT>) {
|
|
static_assert(traits::adc_func_traits<TokenT>::arity == 2, "INVALID COMPLETION TOKEN SIGNATURE!");
|
|
static_assert(std::is_same_v<std::remove_cvref_t<traits::adc_func_arg1_t<TokenT>>, std::error_code>,
|
|
"INVALID COMPLETION TOKEN SIGNATURE!");
|
|
static_assert(traits::adc_output_char_range<
|
|
std::tuple_element_t<1, typename traits::adc_func_traits<TokenT>::args_t>>,
|
|
"INVALID COMPLETION TOKEN SIGNATURE!");
|
|
}
|
|
|
|
using msg_t = std::conditional_t<
|
|
// adc_asio_special_comp_token_c<TokenT> || is_async_ctx_t, RMSGT,
|
|
adc_asio_special_comp_token_c<TokenT>, RMSGT,
|
|
std::remove_cvref_t<std::tuple_element_t<1, typename traits::adc_func_traits<TokenT>::args_t>>>;
|
|
|
|
auto out_flags = std::make_shared<asio::socket_base::message_flags>();
|
|
|
|
auto timer = getDeadlineTimer(_socket, timeout);
|
|
|
|
return asio::async_compose<TokenT, void(std::error_code, msg_t)>(
|
|
[out_flags, do_read = true, timer = std::move(timer), this](auto& self, std::error_code ec = {},
|
|
size_t nbytes = 0) mutable {
|
|
msg_t msg;
|
|
|
|
if (!ec) {
|
|
if (do_read) {
|
|
do_read = false;
|
|
if (_receiveQueue.size()) { // return message from queue
|
|
timer->cancel();
|
|
auto imsg = _receiveQueue.front();
|
|
_receiveQueue.pop();
|
|
if constexpr (std::is_same_v<msg_t, RMSGT>) {
|
|
self.complete(std::error_code(), std::move(imsg));
|
|
} else {
|
|
self.complete(std::error_code(), {imsg.begin(), imsg.end()});
|
|
}
|
|
return;
|
|
}
|
|
|
|
auto n_avail = _socket.available();
|
|
auto buff = _streamBuffer.prepare(n_avail ? n_avail : 1);
|
|
|
|
if constexpr (std::derived_from<socket_t,
|
|
asio::basic_stream_socket<typename socket_t::protocol_type>>) {
|
|
return asio::async_read(_socket, std::move(buff), asio::transfer_at_least(1),
|
|
std::move(self));
|
|
} else if constexpr (std::derived_from<socket_t, asio::basic_datagram_socket<
|
|
typename socket_t::protocol_type>>) {
|
|
// datagram, so it should be received at once
|
|
return _socket.async_receive(std::move(buff), std::move(self));
|
|
} else if constexpr (std::derived_from<socket_t, asio::basic_seq_packet_socket<
|
|
typename socket_t::protocol_type>>) {
|
|
// datagram, so it should be received at once
|
|
return _socket.async_receive(std::move(buff), *out_flags, std::move(self));
|
|
} else {
|
|
static_assert(false, "UNKNOWN ASIO-LIBRARY SOCKET TYPE!!!");
|
|
}
|
|
}
|
|
|
|
// zero-length message for SEQ_PACK sockets is EOF
|
|
if constexpr (std::derived_from<socket_t,
|
|
asio::basic_seq_packet_socket<typename socket_t::protocol_type>>) {
|
|
if (!nbytes) {
|
|
timer->cancel();
|
|
self.complete(std::error_code(asio::error::misc_errors::eof), std::move(msg));
|
|
return;
|
|
}
|
|
}
|
|
|
|
_streamBuffer.commit(nbytes);
|
|
|
|
// if (!nbytes) {
|
|
// do_read = true;
|
|
// asio::post(std::move(self)); // initiate consequence socket's read operation
|
|
// return;
|
|
// }
|
|
|
|
auto start_ptr = static_cast<const char*>(_streamBuffer.data().data());
|
|
|
|
auto net_pack = this->search(std::span(start_ptr, _streamBuffer.size()));
|
|
if (net_pack.empty()) {
|
|
do_read = true;
|
|
asio::post(std::move(self)); // initiate consequence socket's read operation
|
|
return;
|
|
}
|
|
|
|
timer->cancel(); // there were no errors in the asynchronous read-operation, so stop timer
|
|
|
|
// here one has at least a single message
|
|
|
|
std::ranges::copy(this->fromProto(net_pack), std::back_inserter(msg));
|
|
_streamBuffer.consume(net_pack.size());
|
|
|
|
|
|
while (_streamBuffer.size()) { // search for possible additional session protocol packets
|
|
start_ptr = static_cast<const char*>(_streamBuffer.data().data());
|
|
|
|
net_pack = this->search(std::span(start_ptr, _streamBuffer.size()));
|
|
|
|
if (!net_pack.empty()) {
|
|
_receiveQueue.emplace();
|
|
std::ranges::copy(this->fromProto(net_pack), std::back_inserter(_receiveQueue.back()));
|
|
_streamBuffer.consume(net_pack.size());
|
|
} else {
|
|
break; // exit and hold remaining bytes in stream buffer
|
|
}
|
|
}
|
|
}
|
|
|
|
if (isTimeout(timer, ec)) {
|
|
ec = std::make_error_code(std::errc::timed_out);
|
|
} else { // an error occured in async_*
|
|
timer->cancel();
|
|
}
|
|
|
|
if constexpr (std::is_same_v<msg_t, RMSGT>) {
|
|
self.complete(ec, std::move(msg));
|
|
} else {
|
|
self.complete(ec, {msg.begin(), msg.end()});
|
|
}
|
|
|
|
// if constexpr (adc_asio_special_comp_token_c<TokenT>) {
|
|
// self.complete(ec, std::move(msg));
|
|
// } else { // may be of non-RMSGT type
|
|
// self.complete(ec, {msg.begin(), msg.end()});
|
|
// }
|
|
},
|
|
token, _receiveStrand);
|
|
}
|
|
|
|
/* blocking methods */
|
|
|
|
template <traits::adc_time_duration_c TimeoutT = decltype(DEFAULT_CONNECT_TIMEOUT)>
|
|
auto connect(const endpoint_t& endpoint, const TimeoutT& timeout = DEFAULT_CONNECT_TIMEOUT)
|
|
{
|
|
std::future<void> ftr = asyncConnect(endpoint, asio::use_future, timeout);
|
|
ftr.get();
|
|
}
|
|
|
|
template <traits::adc_input_char_range R, traits::adc_time_duration_c TimeoutT = decltype(DEFAULT_SEND_TIMEOUT)>
|
|
auto send(const R& msg, const TimeoutT& timeout = DEFAULT_SEND_TIMEOUT)
|
|
{
|
|
std::future<void> ftr = asyncSend(msg, asio::use_future, timeout);
|
|
ftr.get();
|
|
}
|
|
|
|
template <traits::adc_time_duration_c TimeoutT = decltype(DEFAULT_RECEIVE_TIMEOUT)>
|
|
auto receive(const TimeoutT& timeout = DEFAULT_RECEIVE_TIMEOUT)
|
|
{
|
|
std::future<RMSGT> ftr = asyncReceive(asio::use_future, timeout);
|
|
return ftr.get();
|
|
}
|
|
|
|
// one still may receive messages from queue!
|
|
std::error_code close()
|
|
{
|
|
std::error_code ec;
|
|
|
|
_socket.shutdown(_shutdownType, ec);
|
|
if (!ec) {
|
|
_socket.close(ec);
|
|
}
|
|
|
|
return ec;
|
|
}
|
|
|
|
/* additional ASIO-related methods */
|
|
|
|
void clearRcvQueue()
|
|
{
|
|
// clear receiving messages queue
|
|
// NOTE: there is no racing condition here since using asio::strand!
|
|
asio::post(_receiveStrand, [this]() {
|
|
//
|
|
_receiveQueue = {};
|
|
});
|
|
}
|
|
|
|
void clearRcvBuff()
|
|
{
|
|
asio::post(_receiveStrand, [this]() {
|
|
//
|
|
_streamBuffer.consume(_streamBuffer.size());
|
|
});
|
|
}
|
|
|
|
void clearRcvData()
|
|
{
|
|
asio::post(_receiveStrand, [this]() {
|
|
_receiveQueue = {};
|
|
_streamBuffer.consume(_streamBuffer.size());
|
|
});
|
|
}
|
|
|
|
void setShutdownType(asio::socket_base::shutdown_type shutdown_type)
|
|
{
|
|
_shutdownType = shutdown_type;
|
|
}
|
|
|
|
asio::socket_base::shutdown_type getShutdownType() const
|
|
{
|
|
return _shutdownType;
|
|
}
|
|
|
|
protected:
|
|
static constexpr netservice_ident_t _ident =
|
|
std::derived_from<socket_t, asio::basic_stream_socket<typename socket_t::protocol_type>>
|
|
? "STREAM-SOCKET NETWORK SERVICE"
|
|
: std::derived_from<socket_t, asio::basic_datagram_socket<typename socket_t::protocol_type>>
|
|
? "DATAGRAM-SOCKET NETWORK SERVICE"
|
|
: std::derived_from<socket_t, asio::basic_seq_packet_socket<typename socket_t::protocol_type>>
|
|
? "SEQPACKET-SOCKET NETWORK SERVICE"
|
|
: "UNKNOWN";
|
|
|
|
asio::io_context& _ioContext;
|
|
asio::io_context::strand _receiveStrand;
|
|
|
|
socket_t _socket;
|
|
|
|
asio::streambuf _streamBuffer;
|
|
|
|
std::queue<std::vector<char>> _receiveQueue;
|
|
|
|
asio::socket_base::shutdown_type _shutdownType = asio::socket_base::shutdown_both;
|
|
|
|
|
|
// public:
|
|
template <typename CancelableT, traits::adc_time_duration_c TimeoutT>
|
|
static std::unique_ptr<asio::steady_timer> getDeadlineTimer(CancelableT& obj,
|
|
const TimeoutT& timeout,
|
|
bool arm = true)
|
|
{
|
|
auto timer = std::make_unique<asio::steady_timer>(obj.get_executor());
|
|
|
|
// if (timeout == std::chrono::duration<typename TimeoutT::rep, typename TimeoutT::period>::max()) {
|
|
// return timer; // do not arm the timer if MAX duration are given
|
|
// }
|
|
|
|
if (arm) {
|
|
std::chrono::seconds max_d = std::chrono::duration_cast<std::chrono::seconds>(
|
|
std::chrono::steady_clock::time_point::max() - std::chrono::steady_clock::now() -
|
|
std::chrono::seconds(1));
|
|
|
|
timer->expires_after(timeout < max_d ? timeout : max_d); // to avoid overflow!
|
|
// timer->expires_after(timeout);
|
|
|
|
timer->async_wait([&obj](const std::error_code& ec) mutable {
|
|
if (!ec) {
|
|
obj.cancel();
|
|
}
|
|
});
|
|
}
|
|
|
|
return timer;
|
|
}
|
|
|
|
template <typename TimerT>
|
|
static bool isTimeout(const std::unique_ptr<TimerT>& timer, const std::error_code& ec)
|
|
{
|
|
auto exp_time = timer->expiry();
|
|
return (exp_time < std::chrono::steady_clock::now()) && (ec == asio::error::operation_aborted);
|
|
}
|
|
|
|
template <typename TimerT>
|
|
static bool isTimeout(const std::shared_ptr<TimerT>& timer, const std::error_code& ec)
|
|
{
|
|
auto exp_time = timer->expiry();
|
|
return (exp_time < std::chrono::steady_clock::now()) && (ec == asio::error::operation_aborted);
|
|
}
|
|
};
|
|
|
|
} // namespace adc::impl
|