net/adc_netproto.h: add AdcStartStopSeqSessionProto class

spdlog::format_string_t<ArgTs...> fmt, ArgTs&&... args) method

CMakeLists.txt

@@ -68,7 +68,6 @@ if (ASIO_LIBRARY)
 
     set(ADC_NETWORK_HEADERS ${ADC_NETWORK_HEADERS}
         net/asio/adc_netservice_asio.h
-        net/asio/adc_netsession_asio.h
         net/asio/adc_device_netserver_asio.h
     )
 
@@ -168,12 +167,17 @@ if (BUILD_TESTS)
     set(DEVATTR_TEST_APP adc_devattr_test)
     add_executable(${DEVATTR_TEST_APP} tests/adc_devattr_test.cpp)
 
+    set(DEV_TEST_APP adc_dev_test)
+    add_executable(${DEV_TEST_APP} tests/adc_dev_test.cpp)
+
     set(NETMSG_TEST_APP adc_netmsg_test)
     add_executable(${NETMSG_TEST_APP} tests/adc_netmsg_test.cpp)
 
     set(NETSERVICE_TEST_APP adc_netservice_test)
     add_executable(${NETSERVICE_TEST_APP} tests/adc_netservice_test.cpp)
-    target_link_libraries(${NETSERVICE_TEST_APP} OpenSSL::SSL OpenSSL::Crypto)
+    if (OPENSSL_LIBRARY)
+        target_link_libraries(${NETSERVICE_TEST_APP} OpenSSL::SSL OpenSSL::Crypto)
+    endif()
 
     if (ASIO_LIBRARY)
         find_package(cxxopts CONFIG)

common/adc_spdlog.h

@@ -84,37 +84,43 @@ public:
     }
 
     template <traits::formattable... ArgTs>
-    void logCritical(std::format_string<ArgTs...> fmt, ArgTs&&... args)
+    void logMessage(spdlog::level::level_enum level, spdlog::format_string_t<ArgTs...> fmt, ArgTs&&... args)
+    {
+        _loggerSPtr->log(level, fmt, std::forward<ArgTs>(args)...);
+    }
+
+    template <traits::formattable... ArgTs>
+    void logCritical(spdlog::format_string_t<ArgTs...> fmt, ArgTs&&... args)
     {
         _loggerSPtr->log(spdlog::level::critical, fmt, std::forward<ArgTs>(args)...);
     }
 
-    template <traits::formattable... ArgTs>
-    void logError(std::format_string<ArgTs...> fmt, ArgTs&&... args)
+    template <typename... ArgTs>
+    void logError(spdlog::format_string_t<ArgTs...> fmt, ArgTs&&... args)
     {
         _loggerSPtr->log(spdlog::level::err, fmt, std::forward<ArgTs>(args)...);
     }
 
     template <traits::formattable... ArgTs>
-    void logWarn(std::format_string<ArgTs...> fmt, ArgTs&&... args)
+    void logWarn(spdlog::format_string_t<ArgTs...> fmt, ArgTs&&... args)
     {
         _loggerSPtr->log(spdlog::level::warn, fmt, std::forward<ArgTs>(args)...);
     }
 
     template <traits::formattable... ArgTs>
-    void logInfo(std::format_string<ArgTs...> fmt, ArgTs&&... args)
+    void logInfo(spdlog::format_string_t<ArgTs...> fmt, ArgTs&&... args)
     {
         _loggerSPtr->log(spdlog::level::info, fmt, std::forward<ArgTs>(args)...);
     }
 
     template <traits::formattable... ArgTs>
-    void logDebug(std::format_string<ArgTs...> fmt, ArgTs&&... args)
+    void logDebug(spdlog::format_string_t<ArgTs...> fmt, ArgTs&&... args)
     {
         _loggerSPtr->log(spdlog::level::debug, fmt, std::forward<ArgTs>(args)...);
     }
 
     template <traits::formattable... ArgTs>
-    void logTrace(std::format_string<ArgTs...> fmt, ArgTs&&... args)
+    void logTrace(spdlog::format_string_t<ArgTs...> fmt, ArgTs&&... args)
     {
         _loggerSPtr->log(spdlog::level::trace, fmt, std::forward<ArgTs>(args)...);
     }
@@ -133,7 +139,7 @@ protected:
 
         ptrn += " [";
         std::ranges::copy(mark, std::back_inserter(ptrn));
-        ptrn += "] ";
+        ptrn += "]";
 
         std::ranges::copy(_currentLogPattern | std::views::drop(pos), std::back_inserter(ptrn));
 

device/adc_device.h

@@ -157,7 +157,7 @@ public:
     template <typename... CtorArgTs>
     AdcGenericDevice& addAttribute(CtorArgTs&&... ctor_args)
     {
-        return addAttribute({std::forward<CtorArgTs>(ctor_args)...});
+        return addAttribute(AttributeT(std::forward<CtorArgTs>(ctor_args)...));
     }
 
 

device/adc_device_attribute.h

@@ -202,9 +202,22 @@ protected:
     template <typename VT>
     inline static std::unordered_map<const AdcDeviceAttribute*, std::function<void(const VT&)>> _setterFunc{};
 
-    std::function<SerializedT()> _serializerFunc;
+    // from user to inner type converter
+    template <typename UT>
+    inline static std::unordered_map<const AdcDeviceAttribute*,
+                                     std::function<void(const UT&, const AdcDeviceAttribute*)>>
+        _convFuncTo{};
 
-    std::function<void(const SerializedT&)> _deserializerFunc;
+    // from innner to user type converter
+    template <typename UT>
+    inline static std::unordered_map<const AdcDeviceAttribute*, std::function<UT(const AdcDeviceAttribute*)>>
+        _convFuncFrom{};
+
+    // std::function<SerializedT()> _serializerFunc;
+    std::function<SerializedT(const AdcDeviceAttribute*)> _serializerFunc;
+
+    // std::function<void(const SerializedT&)> _deserializerFunc;
+    std::function<void(const SerializedT&, const AdcDeviceAttribute*)> _deserializerFunc;
 
     // static inline std::vector<std::function<void(AdcDeviceAttribute*)>> _clearFunc{};
     std::vector<std::function<void(AdcDeviceAttribute*)>> _clearFunc{};
@@ -254,34 +267,50 @@ public:
         }
 
         if constexpr (!std::is_null_pointer_v<GT> && !std::is_null_pointer_v<SRT>) {
-            auto& getter_func = _getterFunc<ValueT>[this];
-            _serializerFunc = [getter_func, wrapper = traits::adc_pf_wrapper(std::forward<SRT>(serializer)), this]() {
-                auto& serializer = std::get<0>(wrapper);
+            // auto& getter_func = _getterFunc<ValueT>[this];
+            // _serializerFunc = [getter_func, wrapper = traits::adc_pf_wrapper(std::forward<SRT>(serializer)), this]()
+            // {
+            _serializerFunc =
+                [wrapper = traits::adc_pf_wrapper(std::forward<SRT>(serializer))](const AdcDeviceAttribute* inst) {
+                    auto& serializer = std::get<0>(wrapper);
 
-                // auto val = _getterFunc<ValueT>[this]();
-                auto val = getter_func();
+                    // auto val = _getterFunc<ValueT>[this]();
+                    auto val = _getterFunc<ValueT>[inst]();
+                    // auto val = getter_func();
 
-                return serializer(val);
-            };
+                    return serializer(val);
+                };
         }
 
 
         if constexpr (!std::is_null_pointer_v<ST> && !std::is_null_pointer_v<DSRT>) {
-            auto& setter_func = _setterFunc<ValueT>[this];
-            _deserializerFunc = [setter_func, wrapper = traits::adc_pf_wrapper(std::forward<DSRT>(deserializer)),
-                                 this](const SerializedT& sval) {
+            // auto& setter_func = _setterFunc<ValueT>[this];
+            // _deserializerFunc = [setter_func, wrapper = traits::adc_pf_wrapper(std::forward<DSRT>(deserializer)),
+            //                      this](const SerializedT& sval) {
+            _deserializerFunc = [wrapper = traits::adc_pf_wrapper(std::forward<DSRT>(deserializer))](
+                                    const SerializedT& sval, const AdcDeviceAttribute* inst) {
                 auto& deserializer = std::get<0>(wrapper);
 
                 ValueT val = deserializer(sval);
 
                 // _setterFunc<ValueT>[this](val);
-                setter_func(val);
+                _setterFunc<ValueT>[inst](val);
+                // setter_func(val);
             };
         }
 
+        _convFuncTo<ValueT>[this] = [](const ValueT& v, const AdcDeviceAttribute* inst) {
+            _setterFunc<ValueT>[inst](v);
+        };
+
+        _convFuncFrom<ValueT>[this] = [](const AdcDeviceAttribute* inst) { return _getterFunc<ValueT>[inst](); };
+
         _clearFunc.emplace_back([](AdcDeviceAttribute* inst) {
             _getterFunc<ValueT>.erase(inst);
             _setterFunc<ValueT>.erase(inst);
+
+            _convFuncFrom<ValueT>.erase(inst);
+            _convFuncTo<ValueT>.erase(inst);
         });
 
 
@@ -289,12 +318,18 @@ public:
         _copyFunc.emplace_back([](const AdcDeviceAttribute* from, AdcDeviceAttribute* to) {
             _getterFunc<ValueT>.emplace(to, _getterFunc<ValueT>[from]);
             _setterFunc<ValueT>.emplace(to, _setterFunc<ValueT>[from]);
+
+            _convFuncFrom<ValueT>.emplace(to, _convFuncFrom<ValueT>[from]);
+            _convFuncTo<ValueT>.emplace(to, _convFuncTo<ValueT>[from]);
         });
 
         // move instance function
         _moveFunc.emplace_back([](AdcDeviceAttribute* from, AdcDeviceAttribute* to) {
             _getterFunc<ValueT>.emplace(to, std::move(_getterFunc<ValueT>[from]));
             _setterFunc<ValueT>.emplace(to, std::move(_setterFunc<ValueT>[from]));
+
+            _convFuncFrom<ValueT>.emplace(to, std::move(_convFuncFrom<ValueT>[from]));
+            _convFuncTo<ValueT>.emplace(to, std::move(_convFuncTo<ValueT>[from]));
         });
     }
 
@@ -409,9 +444,13 @@ public:
                 fn(&other, this);
             }
 
-            _copyFunc = std::move(other._copyFunc);
-            _moveFunc = std::move(other._moveFunc);
-            _clearFunc = std::move(other._clearFunc);
+            // _copyFunc = std::move(other._copyFunc);
+            // _moveFunc = std::move(other._moveFunc);
+            // _clearFunc = std::move(other._clearFunc);
+
+            _copyFunc = other._copyFunc;
+            _moveFunc = other._moveFunc;
+            _clearFunc = other._clearFunc;
 
             _ident = std::move(other._ident);
             _accessType = std::move(other._accessType);
@@ -457,54 +496,86 @@ public:
                       "Deduced attribute internal type must not be std::nullptr_t!!!");
         static_assert(!std::is_null_pointer_v<user_t>, "Deduced user-defined type must not be std::nullptr_t!!!");
 
+        // return *this;
         try {
             if (_accessType != AdcDeviceAttribute::WriteOnly) {
-                auto& getter = _getterFunc<value_t>.at(this);  // throw out_of_range if value_t is invalid
+                // auto& getter = _getterFunc<value_t>.at(this);  // throw out_of_range if value_t is invalid
 
-                _getterFunc<user_t>[this] =
-                    [getter, wrapper = traits::adc_pf_wrapper(std::forward<FromFuncT>(func_from_internal)), this]() {
-                        // auto val = _getterFunc<value_t>.at(this)();  // throw out_of_range if value_t is invalid
-                        auto val = getter();
-                        return std::get<0>(wrapper)(val);  // convert from internal type
-                    };
+                _convFuncFrom<user_t>[this] = [wrapper = traits::adc_pf_wrapper(std::forward<FromFuncT>(
+                                                   func_from_internal))](const AdcDeviceAttribute* inst) {
+                    auto val = _getterFunc<value_t>[inst]();
+                    return std::get<0>(wrapper)(val);  // convert from internal type
+                };
+                // _getterFunc<user_t>.try_emplace(
+                //     this, [getter = _getterFunc<value_t>.at(this),
+                //            wrapper = traits::adc_pf_wrapper(std::forward<FromFuncT>(func_from_internal))]() {
+                //         auto val = getter();
+                //         return std::get<0>(wrapper)(val);  // convert from internal type
+                //     });
+                // _getterFunc<user_t>[this] =
+                //     [getter = _getterFunc<value_t>.at(this),
+                //      wrapper = traits::adc_pf_wrapper(std::forward<FromFuncT>(func_from_internal))]() {
+                //         auto val = getter();
+                //         return std::get<0>(wrapper)(val);  // convert from internal type
+                //     };
+
+                // _getterFunc<user_t>[this] =
+                //     [getter, wrapper = traits::adc_pf_wrapper(std::forward<FromFuncT>(func_from_internal)), this]() {
+                //         // auto val = _getterFunc<value_t>.at(this)();  // throw out_of_range if value_t is invalid
+                //         auto val = getter();
+                //         return std::get<0>(wrapper)(val);  // convert from internal type
+                //     };
             }  // ignore "from_internal" conversional function for write-only attribute
 
 
 
             if (_accessType != AdcDeviceAttribute::ReadOnly) {
-                auto& setter = _setterFunc<value_t>.at(this);  // throw out_of_range if value_t is invalid
-
-                _setterFunc<user_t>[this] = [setter,
-                                             wrapper = traits::adc_pf_wrapper(std::forward<ToFuncT>(func_to_internal)),
-                                             this](const user_t& val) {
+                _convFuncTo<user_t>[this] = [wrapper = traits::adc_pf_wrapper(std::forward<ToFuncT>(func_to_internal))](
+                                                const user_t& val, const AdcDeviceAttribute* inst) {
                     value_t value = std::get<0>(wrapper)(val);  // convert to internal type
-
-                    // throw out_of_range if value_t is invalid
-                    // _setterFunc<value_t>.at(this)(value);
-                    setter(value);
+                    _setterFunc<value_t>[inst](value);
                 };
+                // auto& setter = _setterFunc<value_t>.at(this);  // throw out_of_range if value_t is invalid
+
+                // _setterFunc<user_t>[this] = [setter,
+                //                              wrapper =
+                //                              traits::adc_pf_wrapper(std::forward<ToFuncT>(func_to_internal)),
+                //                              this](const user_t& val) {
+                //     value_t value = std::get<0>(wrapper)(val);  // convert to internal type
+
+                //     // throw out_of_range if value_t is invalid
+                //     // _setterFunc<value_t>.at(this)(value);
+                //     setter(value);
+                // };
             }  // ignore "to_internal" conversional function for read-only attribute
         } catch (const std::out_of_range&) {
             throw std::system_error(AdcDeviceAttributeErrorCode::ERROR_INTERNAL_TYPE_MISMATCH);
         }
 
+        // return *this;
         _clearFunc.emplace_back([](AdcDeviceAttribute* inst) {
-            _getterFunc<user_t>.erase(inst);
-            _setterFunc<user_t>.erase(inst);
+            // _getterFunc<user_t>.erase(inst);
+            // _setterFunc<user_t>.erase(inst);
+            _convFuncFrom<user_t>.erase(inst);
+            _convFuncTo<user_t>.erase(inst);
         });
 
 
         // copy instance functions
         _copyFunc.emplace_back([](const AdcDeviceAttribute* from, AdcDeviceAttribute* to) {
-            _getterFunc<user_t>.emplace(to, _getterFunc<user_t>[from]);
-            _setterFunc<user_t>.emplace(to, _setterFunc<user_t>[from]);
+            // _getterFunc<user_t>.emplace(to, _getterFunc<user_t>[from]);
+            // _setterFunc<user_t>.emplace(to, _setterFunc<user_t>[from]);
+            _convFuncFrom<user_t>.emplace(to, _convFuncFrom<user_t>[from]);
+            _convFuncTo<user_t>.emplace(to, _convFuncTo<user_t>[from]);
         });
 
 
         // move instance functions
         _moveFunc.emplace_back([](AdcDeviceAttribute* from, AdcDeviceAttribute* to) {
-            _getterFunc<user_t>.emplace(to, std::move(_getterFunc<user_t>[from]));
-            _setterFunc<user_t>.emplace(to, std::move(_setterFunc<user_t>[from]));
+            // _getterFunc<user_t>.emplace(to, std::move(_getterFunc<user_t>[from]));
+            // _setterFunc<user_t>.emplace(to, std::move(_setterFunc<user_t>[from]));
+            _convFuncFrom<user_t>.emplace(to, std::move(_convFuncFrom<user_t>[from]));
+            _convFuncTo<user_t>.emplace(to, std::move(_convFuncTo<user_t>[from]));
         });
 
         return *this;
@@ -520,7 +591,8 @@ public:
         using val_t = std::decay_t<UT>;
 
         try {
-            return _getterFunc<val_t>.at(this)();
+            // return _getterFunc<val_t>.at(this)();
+            return _convFuncFrom<val_t>.at(this)(this);
         } catch (const std::out_of_range&) {
             throw std::system_error(AdcDeviceAttributeErrorCode::ERROR_NO_CONV_FUNC);
         }
@@ -537,7 +609,8 @@ public:
         using val_t = std::decay_t<UT>;
 
         try {
-            _setterFunc<val_t>.at(this)(std::forward<UT>(val));
+            // _setterFunc<val_t>.at(this)(std::forward<UT>(val));
+            _convFuncTo<val_t>.at(this)(std::forward<UT>(val), this);
         } catch (const std::out_of_range&) {
             throw std::system_error(AdcDeviceAttributeErrorCode::ERROR_NO_CONV_FUNC);
         }
@@ -574,9 +647,13 @@ public:
                 fn(&other, this);
             }
 
-            _copyFunc = std::move(other._copyFunc);
-            _moveFunc = std::move(other._moveFunc);
-            _clearFunc = std::move(other._clearFunc);
+            // _copyFunc = std::move(other._copyFunc);
+            // _moveFunc = std::move(other._moveFunc);
+            // _clearFunc = std::move(other._clearFunc);
+
+            _copyFunc = other._copyFunc;
+            _moveFunc = other._moveFunc;
+            _clearFunc = other._clearFunc;
 
             _ident = std::move(other._ident);
             _accessType = std::move(other._accessType);
@@ -593,7 +670,8 @@ public:
             throw std::system_error(AdcDeviceAttributeErrorCode::ERROR_WRITE_ONLY);
         }
 
-        return _serializerFunc();
+        // return _serializerFunc();
+        return _serializerFunc(this);
     }
 
     template <typename ST>
@@ -616,7 +694,8 @@ public:
             throw std::system_error(AdcDeviceAttributeErrorCode::ERROR_READ_ONLY);
         }
 
-        _deserializerFunc(sval);
+        // _deserializerFunc(sval);
+        _deserializerFunc(sval, this);
 
         return *this;
     }
@@ -628,7 +707,8 @@ public:
         using s_t = std::decay_t<ST>;
 
         if constexpr (traits::adc_input_char_range<s_t> && traits::adc_input_char_range<serialized_t>) {
-            _deserializerFunc(serialized_t(sval.begin(), sval.end()));
+            // _deserializerFunc(serialized_t(sval.begin(), sval.end()));
+            _deserializerFunc(serialized_t(sval.begin(), sval.end()), this);
         } else {
             static_assert(false, "INVALID USER SERIALIZATION TYPE!");
         }

net/adc_device_netclient.h

@@ -112,7 +112,6 @@ public:
 
         typedef std::vector<char> message_t;
 
-        // Session(const netsession_ident_t& id, netservice_t srv, AdcDeviceNetServer* srv_ptr)
         Session(const netsession_ident_t& id, netservice_t srv, netsession_ctx_t ctx)
             : _ident(id),
               _netService(std::move(srv)),
@@ -151,8 +150,77 @@ public:
         }
 
 
+        // general-purpose server communication methods
+
+        // blocking
+        template <traits::adc_range_of_output_char_range R, typename... ArgTs>
+        R serverCall(ServerResponseType& rtype, std::string_view key, ArgTs&&... args)
+        {
+            typename netservice_t::send_msg_t bytes;
+
+            AdcDeviceProtoMessage msg(bytes);
+            msg.setKeyValue(key, std::forward<ArgTs>(args)...);
+
+            return getFromServer<R>(key, bytes, rtype);
+        }
+
+        template <typename... ArgTs>
+        default_server_resp_t serverCall(ServerResponseType& rtype, std::string_view key, ArgTs&&... args)
+        {
+            return serverCall<default_server_resp_t>(rtype, key, std::forward<ArgTs>(args)...);
+        }
+
+
+        // asynchronous
+        template <std::convertible_to<async_callback_func_t> CallbackT, typename... ArgTs>
+        auto asyncServerCall(std::string_view key, CallbackT&& callback_func, ArgTs&&... args)
+        {
+            auto bytes = std::shared_ptr<typename netservice_t::send_msg_t>();
+
+            AdcDeviceProtoMessage msg(*bytes);
+            msg.setKeyValue(key, std::forward<ArgTs>(args)...);
+
+            asyncSendRecv(*bytes, [bytes, key, wrapper = traits::adc_pf_wrapper(std::forward<CallbackT>(callback_func)),
+                                   this](auto err, auto rmsg) mutable {
+                if (err) {
+                    _clientPtr->logError("An error occured while receiving server respond: {}",
+                                         netservice_t::formattableError(err));
+                } else {
+                    try {
+                        ServerResponseType type;
+                        auto attrs = checkServerCall<default_server_resp_t>(key, rmsg, type);
+
+                        std::forward<CallbackT>(std::get<0>(wrapper))(type, attrs);
+
+                    } catch (const std::system_error& err) {
+                        _clientPtr->logError("An error occured while getting server respond: {}", err.what());
+                    }
+                }
+            });
+        }
+
+
         // ADC device helper methods (blocking)
 
+        // send client HELLO-message
+        template <traits::adc_range_of_output_char_range R,
+                  traits::adc_input_char_range SenderNameT,
+                  typename... ParamTs>
+        R clientHello(ServerResponseType& rtype, SenderNameT&& name, ParamTs&&... params)
+        {
+            // expected respond: ACK HELLO ...
+            // return HELLO ... (or error description 'code category what')
+            return serverCall<R>(rtype, constants::ADC_DEVICE_NETPROTO_KEY_HELLO, std::forward<SenderNameT>(name),
+                                 std::forward<ParamTs>(params)...);
+        }
+
+        template <traits::adc_input_char_range SenderNameT, typename... ParamTs>
+        default_server_resp_t clientHello(ServerResponseType& rtype, SenderNameT&& name, ParamTs&&... params)
+        {
+            return clientHello<default_server_resp_t>(rtype, std::forward<SenderNameT>(name),
+                                                      std::forward<ParamTs>(params)...);
+        }
+
 
         // get names of devices
         template <traits::adc_range_of_output_char_range R>
@@ -160,7 +228,7 @@ public:
         {
             // expected respond: ACK NAMES DEV1 DEV2 ...
             // return DEV1 DEV2 ... (or error description 'code category what')
-            return deviceFuncHelper<R>(constants::ADC_DEVICE_NETPROTO_KEY_NAMES, rtype);
+            return serverCall<R>(rtype, constants::ADC_DEVICE_NETPROTO_KEY_NAMES);
         }
 
         default_server_resp_t deviceNames(ServerResponseType& rtype)
@@ -170,51 +238,49 @@ public:
 
         // bind device to the client
         template <traits::adc_range_of_output_char_range R, traits::adc_input_char_range DevNameT>
-        R bindDevice(DevNameT&& dev_name, ServerResponseType& rtype)
+        R bindDevice(ServerResponseType& rtype, DevNameT&& dev_name)
         {
             // expected respond: ACK DEVICE DEV_NAME
             // return DEV_NAME (or error description 'code category what')
-            return deviceFuncHelper<R>(constants::ADC_DEVICE_NETPROTO_KEY_DEVICE, rtype,
-                                       std::forward<DevNameT>(dev_name));
+            return serverCall<R>(rtype, constants::ADC_DEVICE_NETPROTO_KEY_DEVICE, std::forward<DevNameT>(dev_name));
         }
 
         template <traits::adc_input_char_range DevNameT>
-        default_server_resp_t bindDevice(DevNameT&& dev_name, ServerResponseType& rtype)
+        default_server_resp_t bindDevice(ServerResponseType& rtype, DevNameT&& dev_name)
         {
-            return bindDevice<default_server_resp_t>(std::forward<DevNameT>(dev_name), rtype);
+            return bindDevice<default_server_resp_t>(rtype, std::forward<DevNameT>(dev_name));
         }
 
 
         // execute a command
         template <traits::adc_range_of_output_char_range R, traits::adc_input_char_range CmdNameT>
-        R exec(CmdNameT&& cmd_name, ServerResponseType& rtype)
+        R exec(ServerResponseType& rtype, CmdNameT&& cmd_name)
         {
             // expected respond: ACK CMD CMD_NAME
             // return CMD_NAME ... (or error description 'code category what')
-            return deviceFuncHelper<R>(constants::ADC_DEVICE_NETPROTO_KEY_CMD, rtype, std::forward<CmdNameT>(cmd_name));
+            return serverCall<R>(rtype, constants::ADC_DEVICE_NETPROTO_KEY_CMD, std::forward<CmdNameT>(cmd_name));
         }
 
         template <traits::adc_input_char_range CmdNameT>
-        default_server_resp_t exec(CmdNameT&& cmd_name, ServerResponseType& rtype)
+        default_server_resp_t exec(ServerResponseType& rtype, CmdNameT&& cmd_name)
         {
-            return exec<default_server_resp_t>(std::forward<CmdNameT>(cmd_name), rtype);
+            return exec<default_server_resp_t>(rtype, std::forward<CmdNameT>(cmd_name));
         }
 
 
         // get an attribute value
         template <traits::adc_range_of_output_char_range R, traits::adc_input_char_range AttrNameT>
-        R getAttr(AttrNameT&& attr_name, ServerResponseType& rtype)
+        R getAttr(ServerResponseType& rtype, AttrNameT&& attr_name)
         {
             // expected respond: ACK GET ATTR_NAME ATTR_VALUE
             // return ATTR_NAME ATTR_VALUE (or error description 'code category what')
-            return deviceFuncHelper<R>(constants::ADC_DEVICE_NETPROTO_KEY_GET, rtype,
-                                       std::forward<AttrNameT>(attr_name));
+            return serverCall<R>(rtype, constants::ADC_DEVICE_NETPROTO_KEY_GET, std::forward<AttrNameT>(attr_name));
         }
 
         template <traits::adc_input_char_range AttrNameT>
-        default_server_resp_t getAttr(AttrNameT&& attr_name, ServerResponseType& rtype)
+        default_server_resp_t getAttr(ServerResponseType& rtype, AttrNameT&& attr_name)
         {
-            return getAttr<default_server_resp_t>(std::forward<AttrNameT>(attr_name), rtype);
+            return getAttr<default_server_resp_t>(rtype, std::forward<AttrNameT>(attr_name));
         }
 
 
@@ -227,8 +293,8 @@ public:
         {
             // expected respond: ACK SET ATTR_NAME ATTR_VALUE
             // return ATTR_NAME ATTR_VALUE (or error description 'code category what')
-            return deviceFuncHelper<R>(constants::ADC_DEVICE_NETPROTO_KEY_SET, rtype, std::forward<ValueT>(value),
-                                       std::forward<ValueTs>(values)...);
+            return serverCall<R>(constants::ADC_DEVICE_NETPROTO_KEY_SET, rtype, std::forward<AttrNameT>(attr_name),
+                                 std::forward<ValueT>(value), std::forward<ValueTs>(values)...);
         }
 
         template <traits::adc_input_char_range AttrNameT, typename ValueT, typename... ValueTs>
@@ -243,32 +309,40 @@ public:
 
         // ADC device helper methods (asynchronous)
 
+        template <std::convertible_to<async_callback_func_t> CallbackT,
+                  traits::adc_input_char_range SenderNameT,
+                  typename... ParamTs>
+        auto asyncClientHello(CallbackT&& callback_func, SenderNameT&& name, ParamTs&&... params)
+        {
+            return asyncServerCall(constants::ADC_DEVICE_NETPROTO_KEY_HELLO, std::forward<CallbackT>(callback_func),
+                                   std::forward<SenderNameT>(name), std::forward<ParamTs>(params)...);
+        }
+
         template <std::convertible_to<async_callback_func_t> CallbackT>
         auto asyncDeviceNames(CallbackT&& callback_func)
         {
-            return asyncDeviceFuncHelper(constants::ADC_DEVICE_NETPROTO_KEY_NAMES,
-                                         std::forward<CallbackT>(callback_func));
+            return asyncServerCall(constants::ADC_DEVICE_NETPROTO_KEY_NAMES, std::forward<CallbackT>(callback_func));
         }
 
         template <std::convertible_to<async_callback_func_t> CallbackT, traits::adc_input_char_range DevNameT>
         auto asyncBindDevice(CallbackT&& callback_func, DevNameT&& dev_name)
         {
-            return asyncDeviceFuncHelper(constants::ADC_DEVICE_NETPROTO_KEY_DEVICE,
-                                         std::forward<CallbackT>(callback_func), std::forward<DevNameT>(dev_name));
+            return asyncServerCall(constants::ADC_DEVICE_NETPROTO_KEY_DEVICE, std::forward<CallbackT>(callback_func),
+                                   std::forward<DevNameT>(dev_name));
         }
 
         template <std::convertible_to<async_callback_func_t> CallbackT, traits::adc_input_char_range CmdNameT>
         auto asyncExec(CallbackT&& callback_func, CmdNameT&& cmd_name)
         {
-            return asyncDeviceFuncHelper(constants::ADC_DEVICE_NETPROTO_KEY_CMD, std::forward<CallbackT>(callback_func),
-                                         std::forward<CmdNameT>(cmd_name));
+            return asyncServerCall(constants::ADC_DEVICE_NETPROTO_KEY_CMD, std::forward<CallbackT>(callback_func),
+                                   std::forward<CmdNameT>(cmd_name));
         }
 
         template <std::convertible_to<async_callback_func_t> CallbackT, traits::adc_input_char_range AttrNameT>
         auto asyncGetAttr(CallbackT&& callback_func, AttrNameT&& attr_name)
         {
-            return asyncDeviceFuncHelper(constants::ADC_DEVICE_NETPROTO_KEY_GET, std::forward<CallbackT>(callback_func),
-                                         std::forward<AttrNameT>(attr_name));
+            return asyncServerCall(constants::ADC_DEVICE_NETPROTO_KEY_GET, std::forward<CallbackT>(callback_func),
+                                   std::forward<AttrNameT>(attr_name));
         }
 
         template <std::convertible_to<async_callback_func_t> CallbackT,
@@ -277,9 +351,9 @@ public:
                   typename... ValueTs>
         auto asyncSetAttr(CallbackT&& callback_func, AttrNameT&& attr_name, ValueT&& value, ValueTs&&... values)
         {
-            return asyncDeviceFuncHelper(constants::ADC_DEVICE_NETPROTO_KEY_SET, std::forward<CallbackT>(callback_func),
-                                         std::forward<AttrNameT>(attr_name), std::forward<ValueT>(value),
-                                         std::forward<ValueTs>(values)...);
+            return asyncServerCall(constants::ADC_DEVICE_NETPROTO_KEY_SET, std::forward<CallbackT>(callback_func),
+                                   std::forward<AttrNameT>(attr_name), std::forward<ValueT>(value),
+                                   std::forward<ValueTs>(values)...);
         }
 
     protected:
@@ -297,7 +371,7 @@ public:
         // helper methods
 
         template <traits::adc_range_of_output_char_range R>
-        R checkServerRespond(std::string_view key, const auto& bytes, ServerResponseType& type) const
+        R checkServerCall(std::string_view key, const auto& bytes, ServerResponseType& type) const
         {
             AdcDeviceProtoMessage dev_msg(bytes);
 
@@ -321,47 +395,9 @@ public:
         {
             auto rbytes = sendRecv(bytes);
 
-            return checkServerRespond<R>(key, rbytes, type);
+            return checkServerCall<R>(key, rbytes, type);
         }
 
-        template <traits::adc_range_of_output_char_range R, typename... ArgTs>
-        R deviceFuncHelper(std::string_view key, ServerResponseType& rtype, ArgTs&&... args)
-        {
-            typename netservice_t::send_msg_t bytes;
-
-            AdcDeviceProtoMessage msg(bytes);
-            msg.setKeyValue(key, std::forward<ArgTs>(args)...);
-
-            return getFromServer<R>(key, bytes, rtype);
-        }
-
-
-        template <std::convertible_to<async_callback_func_t> CallbackT, typename... ArgTs>
-        auto asyncDeviceFuncHelper(std::string_view key, CallbackT&& callback_func, ArgTs&&... args)
-        {
-            auto bytes = std::shared_ptr<typename netservice_t::send_msg_t>();
-
-            AdcDeviceProtoMessage msg(*bytes);
-            msg.setKeyValue(key, std::forward<ArgTs>(args)...);
-
-            asyncSendRecv(*bytes, [bytes, key, wrapper = traits::adc_pf_wrapper(std::forward<CallbackT>(callback_func)),
-                                   this](auto err, auto rmsg) mutable {
-                if (err) {
-                    _clientPtr->logError("An error occured while receiving server respond: {}",
-                                         netservice_t::formattableError(err));
-                } else {
-                    try {
-                        ServerResponseType type;
-                        auto attrs = checkServerRespond<default_server_resp_t>(key, rmsg, type);
-
-                        std::forward<CallbackT>(std::get<0>(wrapper))(type, attrs);
-
-                    } catch (const std::system_error& err) {
-                        _clientPtr->logError("An error occured while getting server respond: {}", err.what());
-                    }
-                }
-            });
-        }
 
         template <traits::adc_input_char_range SendMsgT>
         auto sendRecv(const SendMsgT& send_msg)
@@ -394,6 +430,8 @@ public:
 };
 
 
+/*  A HELPER CLASS TO IMPLEMENT AN SIMPLE QUEUE FOR DEVICE ATTRIBUTE GET/SET OPERATIONS AND COMMAND EXECUTION  */
+
 template <traits::adc_range_of_input_char_range ArgRangeT = std::vector<std::string>>
 class AdcNetClientSendQueue
 {
@@ -415,13 +453,13 @@ public:
         return *this;
     }
 
-    template <traits::adc_input_char_range... ElemTs>
-    AdcNetClientSendQueue& addToQueue(std::string key, ElemTs&&... elems)
+    template <traits::adc_input_char_range... ArgTs>
+    AdcNetClientSendQueue& addToQueue(std::string key, ArgTs&&... elems)
     {
-        if constexpr (sizeof...(ElemTs)) {
+        if constexpr (sizeof...(ArgTs)) {
             _queue.push({key, ArgRangeT()});
 
-            addToQueueHelper(std::get<1>(_queue.back()), std::forward<ElemTs>(elems)...);
+            addToQueueHelper(std::get<1>(_queue.back()), std::forward<ArgTs>(elems)...);
         }
 
         return *this;
@@ -463,17 +501,17 @@ public:
 protected:
     std::queue<queue_elem_t> _queue;
 
-    template <traits::adc_input_char_range ElemT, traits::adc_input_char_range... ElemTs>
-    void addToQueueHelper(ArgRangeT& args, ElemT&& elem, ElemTs&&... elems)
+    template <traits::adc_input_char_range ArgT, traits::adc_input_char_range... ArgTs>
+    void addToQueueHelper(ArgRangeT& args, ArgT&& elem, ArgTs&&... elems)
     {
         using el_t = std::ranges::range_value_t<ArgRangeT>;
 
-        if constexpr (std::same_as<el_t, std::remove_cvref_t<ElemT>>) {
+        if constexpr (std::same_as<el_t, std::remove_cvref_t<ArgT>>) {
             std::ranges::copy(std::ranges::single_view(elem), std::back_inserter(args));
         } else {
             std::span<const char> sp;
 
-            if constexpr (std::is_array_v<std::remove_cvref_t<ElemT>>) {
+            if constexpr (std::is_array_v<std::remove_cvref_t<ArgT>>) {
                 sp = std::string_view(elem);
             } else {
                 sp = std::span<const char>(elem);
@@ -488,8 +526,8 @@ protected:
                               std::back_inserter(args));
         }
 
-        if constexpr (sizeof...(ElemTs)) {
-            addToQueue(args, std::forward<ElemTs>(elems)...);
+        if constexpr (sizeof...(ArgTs)) {
+            addToQueue(args, std::forward<ArgTs>(elems)...);
         }
     }
 };

net/adc_device_netserver.h

@@ -155,8 +155,8 @@ protected:
                       CmdIdDeserialT&& cmd_id_deser_func = {})
             : _id(id)
         {
-            _get_attr = [dev_ptr, wrapper = traits::adc_pf_wrapper(std::forward<AttrIdDeserialT>(attr_id_deser_func)),
-                         this](const auto& attr_name) mutable {
+            _get_attr = [dev_ptr, wrapper = traits::adc_pf_wrapper(std::forward<AttrIdDeserialT>(attr_id_deser_func))](
+                            const auto& attr_name) mutable {
                 auto attr_id = std::get<0>(wrapper)(attr_name);
                 auto& attr = (*dev_ptr)[attr_id];
                 // auto& attr = dev_ptr->operator[](attr_id);
@@ -344,7 +344,8 @@ public:
                             }
                         }
                         if (found) {
-                            msg.ack(msg_t::DEVICE_KEY, attrs);
+                            // msg.ack(msg_t::DEVICE_KEY, attrs);
+                            msg.ack(constants::ADC_DEVICE_NETPROTO_KEY_DEVICE, attrs);
                         } else {
                             msg.err(std::make_error_code(AdcDeviceNetServerSessionError::ERROR_UNKNOWN_DEVICE_ID));
                         }
@@ -356,14 +357,17 @@ public:
                     for (auto& [ptr, dev_wr] : _serverPtr->_devices) {
                         names.emplace_back(dev_wr.ident());
                     }
-                    msg.ack(msg_t::NAMES_KEY, names);
+                    // msg.ack(msg_t::NAMES_KEY, names);
+                    msg.ack(constants::ADC_DEVICE_NETPROTO_KEY_NAMES, names);
                 } else if (msg.isHELLO()) {
-                    msg.ack(msg_t::HELLO_KEY, _serverPtr->_serverIdent);
+                    // msg.ack(msg_t::HELLO_KEY, _serverPtr->_serverIdent);
+                    msg.ack(constants::ADC_DEVICE_NETPROTO_KEY_HELLO, _serverPtr->_serverIdent);
                 } else if (msg.isGET()) {  // get attribute value
                     attrs = msg.template attrs<attr_vec_t>(0, 1);
                     if (attrs.size()) {
                         auto val = _bindDevice->getAttr(get_elem(0));
-                        msg.ack(msg_t::GET_KEY, get_elem(0), val);
+                        // msg.ack(msg_t::GET_KEY, get_elem(0), val);
+                        msg.ack(constants::ADC_DEVICE_NETPROTO_KEY_GET, get_elem(0), val);
                     } else {  // no attr name!
                         msg.err(std::make_error_code(AdcDeviceNetServerSessionError::ERROR_NO_PROTO_ATTRNAME));
                     }
@@ -372,7 +376,8 @@ public:
                     if (attrs.size() >= 2) {
                         auto val = msg.template joinAttrs<serialized_t>(1);
                         _bindDevice->setAttr(get_elem(0), val);
-                        msg.ack(msg_t::SET_KEY, get_elem(0), val);
+                        // msg.ack(msg_t::SET_KEY, get_elem(0), val);
+                        msg.ack(constants::ADC_DEVICE_NETPROTO_KEY_SET, get_elem(0), val);
                     } else {  // no attr name or its value!
                         if (attrs.size() == 1) {
                             msg.err(std::make_error_code(AdcDeviceNetServerSessionError::ERROR_NO_PROTO_ATTRVALUE));
@@ -385,7 +390,8 @@ public:
                     if (attrs.size()) {
                         auto cmd_name = get_elem(0);
                         _bindDevice->exec(cmd_name);
-                        msg.ack(msg_t::CMD_KEY, cmd_name);
+                        // msg.ack(msg_t::CMD_KEY, cmd_name);
+                        msg.ack(constants::ADC_DEVICE_NETPROTO_KEY_CMD, cmd_name);
                     } else {  // no cmd name!
                         msg.err(std::make_error_code(AdcDeviceNetServerSessionError::ERROR_NO_PROTO_CMDNAME));
                     }

net/adc_endpoint.h

@@ -304,6 +304,36 @@ public:
         return proto() == protoMarkWSS;
     }
 
+    // add '\0' char (or replace special-meaning char/char-sequence) to construct UNIX abstract namespace
+    // endpoint path
+    template <typename T = std::nullptr_t>
+    AdcEndpoint& makeAbstract(const T& mark = nullptr)
+        requires(traits::adc_input_char_range<T> || std::same_as<std::remove_cv_t<T>, char> ||
+                 std::is_null_pointer_v<std::remove_cv_t<T>>)
+    {
+        if (!(isLocalStream() || isLocalSeqpacket())) {  // only local proto is valid!
+            return *this;
+        }
+
+        if constexpr (std::is_null_pointer_v<T>) {  // just insert '\0'
+            auto it = _endpoint.insert(std::string::const_iterator(_path.begin()), '\0');
+            _path = std::string_view(it, _endpoint.end());
+        } else if constexpr (std::same_as<std::remove_cv_t<T>, char>) {  // replace a character (mark)
+            auto pos = std::distance(_endpoint.cbegin(), std::string::const_iterator(_path.begin()));
+            if (_endpoint[pos] == mark) {
+                _endpoint[pos] = '\0';
+            }
+        } else {  // replace a character range (mark)
+            if (std::ranges::equal(_path | std::views::take(std::ranges::size(mark), mark))) {
+                auto pos = std::distance(_endpoint.cbegin(), std::string::const_iterator(_path.begin()));
+                _endpoint.replace(pos, std::ranges::size(mark), 1, '\0');
+                _path = std::string_view(_endpoint.begin() + pos, _endpoint.end());
+            }
+        }
+
+        return *this;
+    }
+
 protected:
     std::string _endpoint;
     std::string_view _proto, _host, _path, _portView;

net/adc_netclient.h

@@ -55,7 +55,9 @@ public:
     }
 
 
-    template <interfaces::adc_netsession_c SessionT, typename TokenT, typename... NetServiceCtorArgTs>
+    template <interfaces::adc_netsession_c SessionT,
+              std::invocable<typename SessionT::netservice_t::async_callback_err_t, SessionT> TokenT,
+              typename... NetServiceCtorArgTs>
     void start(const SessionT::netservice_t::endpoint_t& endpoint,
                SessionT::netsession_ident_t id,
                SessionT::netsession_ctx_t sess_ctx,

net/adc_netproto.h

@@ -21,6 +21,7 @@ concept adc_netproto_c = adc_range_of_view_char_range<R> && requires(T t, const
 namespace constants
 {
 
+static constexpr char ADC_DEFAULT_NETPROTO_STARTSEQ[] = "\v";
 static constexpr char ADC_DEFAULT_NETPROTO_STOPSEQ[] = "\n";
 
 static constexpr char ADC_DEFAULT_NETPROTO_STARTMARK[] = "\n\t\r\v\r\t\n";
@@ -39,7 +40,10 @@ struct AdcStopSeqSessionProto {
 
     typedef std::string proto_ident_t;
 
-    proto_ident_t ident() const { return "STOP SEQUENCE PROTO"; }
+    proto_ident_t ident() const
+    {
+        return "STOP SEQUENCE PROTO";
+    }
 
     // template <traits::adc_input_char_range R>
     // auto search(const R& r)
@@ -142,6 +146,105 @@ struct AdcStopSeqSessionProto {
 };
 
 
+template <const char* STARTSEQ = constants::ADC_DEFAULT_NETPROTO_STARTSEQ,
+          const char* STOPSEQ = constants::ADC_DEFAULT_NETPROTO_STOPSEQ>
+struct AdcStartStopSeqSessionProto {
+    static constexpr std::string_view START_SEQ{STARTSEQ};
+    static constexpr size_t START_SEQ_SIZE = START_SEQ.size();
+    static constexpr std::string_view STOP_SEQ{STOPSEQ};
+    static constexpr size_t STOP_SEQ_SIZE = STOP_SEQ.size();
+
+    static_assert(START_SEQ_SIZE, "START BYTE SEQUENCE MUST NOT BE AN EMPTY ONE!!!");
+    static_assert(STOP_SEQ_SIZE, "STOP BYTE SEQUENCE MUST NOT BE AN EMPTY ONE!!!");
+
+    typedef std::string proto_ident_t;
+
+    proto_ident_t ident() const
+    {
+        return "STOP SEQUENCE PROTO";
+    }
+
+    template <traits::adc_input_char_range R>
+    auto search(const R& r)
+    {
+        auto func = [&r](auto& result) {
+            if (std::ranges::size(r) < (START_SEQ_SIZE + STOP_SEQ_SIZE)) {
+                return;
+            }
+
+            auto found_start = std::ranges::search(r, START_SEQ);
+            if (found_start.empty()) {
+                return;
+            }
+
+            auto found_stop = std::ranges::search(r, STOP_SEQ);
+            if (found_stop.empty()) {
+                return;
+            }
+
+            if (found_start.begin() > found_stop.begin()) {
+                return;
+            }
+
+            if constexpr (std::ranges::viewable_range<R>) {
+                result = std::span(found_start.begin(), found_stop.end());
+            } else {
+                std::ranges::copy(found_start.begin(), found_stop.end(), std::back_inserter(result));
+            }
+        };
+
+        if constexpr (std::ranges::viewable_range<R>) {
+            auto res = std::span(r.begin(), r.begin());  // empty std::span
+            func(res);
+            return res;
+        } else {
+            auto res = std::vector<char>();
+            func(res);
+            return res;
+        }
+    }
+
+
+    template <traits::adc_input_char_range R>
+    auto toProto(const R& r)
+    {
+        // return 3-element array with the first element - a view of the start sequence, the second one - as a view of
+        // the input range and the third one - a view of the stop sequence
+
+        if constexpr (std::ranges::viewable_range<R>) {
+            auto res = std::array{std::span(std::span(START_SEQ.begin(), START_SEQ.end()), r.begin(), r.end()),
+                                  std::span(STOP_SEQ.begin(), STOP_SEQ.end())};
+
+            return res;
+        } else {  // return a copy of input range with added to the fron start sequence and appended stop sequence
+            std::decay_t<decltype(r)> res;
+            std::ranges::copy(START_SEQ, std::back_inserter(res));
+            std::ranges::copy(r, std::back_inserter(res));
+            std::ranges::copy(STOP_SEQ, std::back_inserter(res));
+            return res;
+        }
+    }
+
+    template <traits::adc_input_char_range R>
+    auto fromProto(const R& r)
+    {
+        size_t N = std::distance(r.begin(), r.end());
+
+        if (N < (START_SEQ_SIZE + STOP_SEQ_SIZE)) {  // one must ensure for input range size correctness
+            return std::span(r.begin(), r.begin());
+        }
+
+        if constexpr (std::ranges::viewable_range<R>) {
+            return std::span(r.begin() + START_SEQ_SIZE, r.end() - STOP_SEQ_SIZE);
+        } else {
+            R res;
+            std::ranges::copy(r | std::views::drop(START_SEQ_SIZE) | std::views::take(N - STOP_SEQ_SIZE),
+                              std::back_inserter(res));
+            return res;
+        }
+    }
+};
+
 // session protocol for datagram-kind message (e.g. UDP, seqpacket)
 // The protocol does not contain any special characters, so to/fromProto methods
 // return just a copy/one-element-array-of-vew/view of input byte
@@ -149,7 +252,10 @@ struct AdcStopSeqSessionProto {
 struct AdcDatagramSessionProto {
     typedef std::string proto_ident_t;
 
-    proto_ident_t ident() const { return "DATAGRAM PROTO"; }
+    proto_ident_t ident() const
+    {
+        return "DATAGRAM PROTO";
+    }
 
     template <traits::adc_input_char_range R>
     auto search(const R& r)
@@ -201,7 +307,10 @@ struct AdcBinaryBlobSessionProto {
 
     typedef std::string proto_ident_t;
 
-    proto_ident_t ident() const { return "BINARY BLOB PROTO"; }
+    proto_ident_t ident() const
+    {
+        return "BINARY BLOB PROTO";
+    }
 
     template <traits::adc_input_char_range R>
     auto search(const R& r)

net/asio/adc_device_netserver_asio.h

@@ -196,6 +196,13 @@ public:
                        _sessionSendTimeout.count());
     }
 
+    void daemonize()
+    {
+        this->logInfo("Daemonize server process (server addr: {})", (void*)this);
+
+        base_t::daemonize();
+    }
+
 protected:
     asio::io_context& _ioContext;
 
@@ -204,13 +211,6 @@ protected:
     std::chrono::milliseconds _sessionRecvTimeout = std::chrono::hours(12);
     std::chrono::milliseconds _sessionSendTimeout = std::chrono::seconds(5);
 
-    void daemonize()
-    {
-        this->logInfo("Daemonize server process (server addr: {})", (void*)this);
-
-        base_t::daemonize();
-    }
-
     // demonizing ASIO-related methods
     virtual void daemonizePrepare()
     {

net/asio/adc_netservice_asio.h

@@ -6,6 +6,7 @@
 #include <asio/basic_stream_socket.hpp>
 #include <asio/bind_executor.hpp>
 #include <asio/compose.hpp>
+#include <asio/connect.hpp>
 #include <asio/deferred.hpp>
 #include <asio/ip/tcp.hpp>
 #include <asio/ip/udp.hpp>
@@ -124,6 +125,10 @@ public:
     static constexpr bool isTLS = false;
 #endif
 
+    typedef TRANSPORT_PROTOT transport_proto_t;
+    typedef SESSION_PROTOT session_proto_t;
+    typedef RMSGT receive_msg_t;
+
     // typedefs to satisfy 'adc_netservice_c' concept
     typedef std::string_view netservice_ident_t;
 
@@ -154,7 +159,8 @@ public:
     typedef std::function<int(const std::string& serial, const std::vector<unsigned char>& fingerprint, int depth)>
         cert_comp_func_t;
 #else
-    using session_level_socket_t = socket_t;
+    // using session_level_socket_t = socket_t;
+    using session_level_socket_t = std::nullptr_t;
 #endif
 
 
@@ -793,6 +799,17 @@ public:
         return s;
     }
 
+
+    template <std::derived_from<AdcBaseNetServiceASIO> ST,
+              typename EptRangeT,
+              asio::completion_token_for<std::error_code, endpoint_t> CallbackT>
+    friend auto async_connect(ST& service, const EptRangeT& ept_range, CallbackT&& token)
+        requires std::ranges::range<EptRangeT> &&
+                 std::same_as<std::ranges::range_value_t<EptRangeT>, AdcBaseNetServiceASIO::endpoint_t>
+    {
+        return asio::async_connect(service._socket, ept_range, token);
+    };
+
 protected:
     static constexpr netservice_ident_t _ident =
         std::derived_from<socket_t, asio::basic_stream_socket<typename socket_t::protocol_type>>
@@ -814,8 +831,8 @@ protected:
 
     asio::socket_base::shutdown_type _shutdownType = asio::socket_base::shutdown_both;
 
-#ifdef USE_OPENSSL_WITH_ASIO
     session_level_socket_t _sessSocket;
+#ifdef USE_OPENSSL_WITH_ASIO
     std::conditional_t<isTLS, asio::ssl::context, std::nullptr_t> _tlsContext;
     asio::ssl::verify_mode _tlsPeerVerifyMode;
     cert_comp_func_t _tlsCertCompFunc;
@@ -931,7 +948,8 @@ protected:
 
 
 
-/*  */
+/*   PARTIAL AdcBaseNetServiceASIO-CLASS SPECIALIZATIONS  */
+
 template <
     adc_asio_transport_proto_c TRANSPORT_PROTOT,                          // transport-level proto (e.g. asio::ip::tcp)
     interfaces::adc_netsession_proto_c<std::string_view> SESSION_PROTOT,  // session-level proto (see ../adc_netproto.h)

net/asio/adc_netsession_asio.h

@@ -1,198 +0,0 @@
-#pragma once
-
-#include "adc_netservice_asio.h"
-
-namespace adc::impl
-{
-
-template <typename SessionContextT,
-          adc_asio_transport_proto_c TRANSPORT_PROTOT,
-          interfaces::adc_netsession_proto_c<std::string_view> SESSION_PROTOT,
-          traits::adc_output_char_range RMSGT = std::vector<char>>
-class AdcGenericNetSessionASIO : public std::enable_shared_from_this<
-                                     AdcGenericNetSessionASIO<SessionContextT, TRANSPORT_PROTOT, SESSION_PROTOT, RMSGT>>
-{
-public:
-    typedef std::string netsession_ident_t;
-
-    typedef SessionContextT netsession_ctx_t;
-
-    typedef AdcNetServiceASIOBase<TRANSPORT_PROTOT, SESSION_PROTOT, RMSGT> netservice_t;
-    typedef std::shared_ptr<netservice_t> netservice_sptr_t;
-
-    template <traits::adc_input_char_range R>
-    AdcGenericNetSessionASIO(const R& id, netservice_sptr_t netservice, netsession_ctx_t&& context)
-        : _ident(), _netservice(std::move(netservice)), _sessionContext(std::forward<netsession_ctx_t>(context))
-    {
-        if constexpr (std::is_array_v<R>) {
-            _ident = id;
-        } else {
-            _ident = std::string(id.begin(), id.end());
-        }
-    }
-
-    AdcGenericNetSessionASIO(netservice_sptr_t netservice, netsession_ctx_t&& context)
-        : AdcGenericNetSessionASIO(
-              std::derived_from<TRANSPORT_PROTOT, asio::ip::tcp>                      ? "ASIO TCP SESSION"
-              : std::derived_from<TRANSPORT_PROTOT, asio::ip::udp>                    ? "ASIO UDP SESSION"
-              : std::derived_from<TRANSPORT_PROTOT, asio::local::seq_packet_protocol> ? "ASIO UNIX SEQPACKET SESSION"
-              : std::derived_from<TRANSPORT_PROTOT, asio::local::stream_protocol>     ? "ASIO UNIX STREAM SESSION"
-              : std::derived_from<TRANSPORT_PROTOT, asio::local::datagram_protocol>   ? "ASIO UNIX DATAGRAM SESSION"
-                                                                                      : "ASIO UNKNOWN",
-              std::move(netservice),
-              std::forward<netsession_ctx_t>(context))
-    {
-    }
-
-
-    virtual ~AdcGenericNetSessionASIO()
-    {
-        stop();
-    }
-
-
-    netsession_ident_t ident() const
-    {
-        return _ident;
-    }
-
-
-    virtual void start() = 0;
-
-    virtual void stop()
-    {
-        _netservice->close();
-    }
-
-
-    template <traits::adc_time_duration_c TimeoutT>
-    AdcGenericNetSessionASIO& setDefaultTimeouts(const TimeoutT& send_timeout, const TimeoutT& recv_timeout)
-    {
-        _sendTimeout = send_timeout;
-        _recvTimeout = recv_timeout;
-
-        return *this;
-    }
-
-protected:
-    netsession_ident_t _ident;
-
-    netservice_sptr_t _netservice;
-
-    netsession_ctx_t _sessionContext;
-
-    std::chrono::duration<std::chrono::seconds::rep, std::chrono::seconds::period> _recvTimeout =
-        std::chrono::seconds::max();
-
-    std::chrono::duration<std::chrono::seconds::rep, std::chrono::seconds::period> _sendTimeout =
-        std::chrono::seconds(5);
-};
-
-/*
-class AdcGenericNetSessionASIO
-{
-public:
-    typedef std::string netsession_ident_t;
-
-    template <traits::adc_input_char_range R,
-              adc_asio_transport_proto_c TRANSPORT_PROTOT,
-              interfaces::adc_netsession_proto_c<std::string_view> SESSION_PROTOT,
-              traits::adc_output_char_range RMSGT = std::vector<char>,
-              traits::adc_is_callable RECV_MSG_TOKENT>
-    AdcGenericNetSessionASIO(const R& id,
-                      std::shared_ptr<AdcNetServiceASIOBase<TRANSPORT_PROTOT, SESSION_PROTOT, RMSGT>> netservice,
-                      RECV_MSG_TOKENT&& recv_msg_token)
-        : _ident(id.begin(), id.end())
-    {
-        // check receive message completion token signature and deduce message type
-        if constexpr (!adc_asio_special_comp_token_c<RECV_MSG_TOKENT>) {
-            static_assert(traits::adc_func_traits<RECV_MSG_TOKENT>::arity == 2, "INVALID COMPLETION TOKEN SIGNATURE!");
-            static_assert(
-                std::is_same_v<std::remove_cvref_t<traits::adc_func_arg1_t<RECV_MSG_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<RECV_MSG_TOKENT>::args_t>>,
-                          "INVALID COMPLETION TOKEN SIGNATURE!");
-        }
-
-        using msg_t = std::conditional_t<
-            adc_asio_special_comp_token_c<RECV_MSG_TOKENT>, RMSGT,
-            std::remove_cvref_t<std::tuple_element_t<1, typename traits::adc_func_traits<RECV_MSG_TOKENT>::args_t>>>;
-
-
-        _startFunc = [netservice, wrapper = traits::adc_pf_wrapper(std::forward<RECV_MSG_TOKENT>(recv_msg_token)),
-                      this]() {
-            //
-            netservice->asyncReceive(std::get<0>(wrapper), _recvTimeout);
-        };
-
-        _stopFunc = [netservice]() {
-            // stop
-            netservice->close();
-        };
-    }
-
-    template <adc_asio_transport_proto_c TRANSPORT_PROTOT,
-              interfaces::adc_netsession_proto_c<std::string_view> SESSION_PROTOT,
-              traits::adc_output_char_range RMSGT = std::vector<char>,
-              traits::adc_is_callable RECV_MSG_TOKENT>
-    AdcGenericNetSessionASIO(std::shared_ptr<AdcNetServiceASIOBase<TRANSPORT_PROTOT, SESSION_PROTOT, RMSGT>> netservice,
-                      RECV_MSG_TOKENT&& recv_msg_token)
-        : AdcGenericNetSessionASIO(std::derived_from<TRANSPORT_PROTOT, asio::ip::tcp>   ? "TCP SESSION"
-                            : std::derived_from<TRANSPORT_PROTOT, asio::ip::udp> ? "UDP SESSION"
-                            : std::derived_from<TRANSPORT_PROTOT, asio::local::seq_packet_protocol>
-                                ? "UNIX SEQPACKET SESSION"
-                                : std::derived_from<TRANSPORT_PROTOT, asio::local::stream_protocol> ? "UNIX STREAM
-SESSION" : "UNKNOWN", std::move(netservice), std::forward<RECV_MSG_TOKENT>(recv_msg_token))
-    {
-    }
-
-
-    virtual ~AdcGenericNetSessionASIO()
-    {
-        stop();
-    }
-
-
-    netsession_ident_t ident() const
-    {
-        return _ident;
-    }
-
-
-    void start()
-    {
-        _startFunc();
-    }
-
-    void stop()
-    {
-        _stopFunc();
-    }
-
-
-    template <traits::adc_time_duration_c TimeoutT>
-    AdcGenericNetSessionASIO& setDefaultTimeouts(const TimeoutT& send_timeout, const TimeoutT& recv_timeout)
-    {
-        _sendTimeout = send_timeout;
-        _recvTimeout = recv_timeout;
-
-        return *this;
-    }
-
-protected:
-    netsession_ident_t _ident;
-
-    std::function<void()> _startFunc;
-    std::function<void()> _stopFunc;
-
-    std::chrono::duration<std::chrono::seconds::rep, std::chrono::seconds::period> _recvTimeout =
-        std::chrono::seconds::max();
-
-    std::chrono::duration<std::chrono::seconds::rep, std::chrono::seconds::period> _sendTimeout =
-        std::chrono::seconds(5);
-};
-
-*/
-
-}  // namespace adc::impl

tests/adc_asio_netserver_test.cpp

@@ -162,13 +162,14 @@ int main(int argc, char* argv[])
         for (auto& ep : epnt) {
             adc::AdcEndpoint epn(ep);
             if (epn.isValid()) {
-                if (epn.isLocalSeqpacket() || epn.isLocalStream()) {
-                    if (epn.path()[0] == '@') {  // replace '@' to '\0' (use of UNIX abstract namespace)
-                        auto it = std::ranges::find(ep, '@');
-                        *it = '\0';
-                        epn = adc::AdcEndpoint(ep);
-                    }
-                }
+                epn.makeAbstract('@');
+                // if (epn.isLocalSeqpacket() || epn.isLocalStream()) {
+                //     if (epn.path()[0] == '@') {  // replace '@' to '\0' (use of UNIX abstract namespace)
+                //         auto it = std::ranges::find(ep, '@');
+                //         *it = '\0';
+                //         epn = adc::AdcEndpoint(ep);
+                //     }
+                // }
 
                 // std::cout << "try to start listenning at '" << ep << "' ...";
 

tests/adc_dev_test.cpp

@@ -0,0 +1,176 @@
+#include <iostream>
+
+#include "../common/adc_traits.h"
+#include "../device/adc_device.h"
+#include "../device/adc_device_attribute.h"
+#include "../device/adc_device_command.h"
+
+using namespace adc;
+
+typedef std::vector<char> serialized_t;
+
+class DeviceWrapper
+{
+public:
+    // using char_range_t = std::span<const char>;
+    using char_range_t = std::span<char>;
+
+private:
+    serialized_t _id;
+
+    std::function<serialized_t(const serialized_t&)> _get_attr = [](auto) -> serialized_t {
+        throw std::invalid_argument("BAD _get_attr");
+    };
+    std::function<void(const serialized_t&, const serialized_t&)> _set_attr = [](auto, auto) {
+        throw std::invalid_argument("BAD _set_attr");
+    };
+    std::function<void(const serialized_t&)> _exec_cmd = [](auto) { throw std::invalid_argument("BAD _exec_cmd"); };
+
+public:
+    DeviceWrapper() : _id()
+    {
+        // null device
+        std::string_view id{"NULL-DEVICE"};
+        std::ranges::copy(id, std::back_inserter(_id));
+    };
+
+    template <typename DeviceT,
+              typename AttrIdDeserialT = traits::adc_char_identity<typename DeviceT::attr_ident_t>,
+              typename CmdIdDeserialT = traits::adc_char_identity<typename DeviceT::cmd_ident_t>>
+    DeviceWrapper(DeviceT* dev_ptr,
+                  const serialized_t& id,
+                  AttrIdDeserialT&& attr_id_deser_func = {},
+                  CmdIdDeserialT&& cmd_id_deser_func = {})
+        : _id(id)
+    {
+        _get_attr = [dev_ptr, wrapper = traits::adc_pf_wrapper(std::forward<AttrIdDeserialT>(attr_id_deser_func))](
+                        const auto& attr_name) mutable {
+            auto attr_id = std::get<0>(wrapper)(attr_name);
+            auto& attr = (*dev_ptr)[attr_id];
+            // auto& attr = dev_ptr->operator[](attr_id);
+            auto val = attr.serialize();
+            return val;
+        };
+
+        _set_attr = [dev_ptr, wrapper = traits::adc_pf_wrapper(std::forward<AttrIdDeserialT>(attr_id_deser_func))](
+                        const auto& attr_name, const auto& val) mutable {
+            auto attr_id = std::get<0>(wrapper)(attr_name);
+            (*dev_ptr)[attr_id].deserialize(val);
+        };
+
+        _exec_cmd = [dev_ptr, wrapper = traits::adc_pf_wrapper(std::forward<CmdIdDeserialT>(cmd_id_deser_func))](
+                        const auto& cmd_name) mutable {
+            auto cmd_id = std::get<0>(wrapper)(cmd_name);
+            (*dev_ptr)(cmd_id);
+        };
+    }
+
+
+    serialized_t ident() const
+    {
+        // return _get_id();
+        return _id;
+    }
+
+    serialized_t getAttr(const serialized_t& attr_name)
+    {
+        return _get_attr(attr_name);
+    }
+
+    void setAttr(const serialized_t& attr_name, const serialized_t& val)
+    {
+        _set_attr(attr_name, val);
+    }
+
+    void exec(const serialized_t& cmd_name)
+    {
+        _exec_cmd(cmd_name);
+    }
+};
+
+
+static std::vector<DeviceWrapper> devs;
+
+
+auto getAttr(size_t dev_idx, const serialized_t& name)
+{
+    DeviceWrapper& dev = devs[dev_idx];
+
+    return dev.getAttr(name);
+}
+
+int main()
+{
+    typedef AdcGenericDevice<std::string_view, AdcDeviceAttribute<std::string_view, serialized_t>, AdcDeviceCommand<>>
+        dev_t;
+
+    dev_t dev1("DEV1");
+
+    int attr1_val = 10;
+    // dev1.addAttribute(
+    //     "ATTR1",
+    //     [&attr1_val]() {
+    //         std::cout << "ATTR1 getter\n";
+    //         return attr1_val;
+    //     },
+    //     [&attr1_val](const int& v) {
+    //         std::cout << "ATTR1 setter\n";
+    //         attr1_val = v;
+    //     });
+    // dev1.addAttribute(
+    //     "ATTR2",
+    //     [&attr1_val]() {
+    //         std::cout << "ATTR2 getter\n";
+    //         return attr1_val + 10;
+    //     },
+    //     [&attr1_val](const int& v) {
+    //         std::cout << "ATTR2 setter\n";
+    //         attr1_val = v;
+    //     },
+    //     utils::AdcDefaultValueConverter<>::serialize<dev_t::attribute_t::serialized_t, int>);
+    dev1.addAttribute(dev_t::attribute_t::makeArithAttr(
+        "ATTR1",
+        [&attr1_val]() {
+            std::cout << "ATTR1 getter\n";
+            return attr1_val;
+        },
+        [&attr1_val](const int& v) {
+            std::cout << "ATTR1 setter\n";
+            attr1_val = v;
+        }));
+    dev1.addAttribute(dev_t::attribute_t::makeArithAttr(
+        "ATTR2",
+        [&attr1_val]() {
+            std::cout << "ATTR2 getter\n";
+            return (long)attr1_val + 10;
+        },
+        [&attr1_val](const long& v) {
+            std::cout << "ATTR2 setter\n";
+            attr1_val = v;
+        },
+        utils::AdcDefaultValueConverter<>::serialize<dev_t::attribute_t::serialized_t, long>));
+
+    devs.push_back({&dev1, {'D', '1'}});
+
+    serialized_t sn1, sn2;
+    std::ranges::copy(std::string_view("ATTR1"), std::back_inserter(sn1));
+    std::ranges::copy(std::string_view("ATTR2"), std::back_inserter(sn2));
+
+    devs[0].setAttr(sn1, {'7', '7'});
+    auto r = getAttr(0, sn1);
+
+    std::string rs;
+    std::ranges::copy(r, std::back_inserter(rs));
+
+    std::cout << "ATTR1 = " << rs << "\n";
+
+    devs[0].setAttr(sn2, {'7', '7'});
+    r = getAttr(0, sn2);
+
+    rs.clear();
+    std::ranges::copy(r, std::back_inserter(rs));
+
+    std::cout << "ATTR2 = " << rs << "\n";
+
+    return 0;
+}