addon.cc

#include <napi.h>
#include <windows.h>
#include <stdio.h>
#include <netlistmgr.h>
#pragma comment(lib, "ole32.lib" )
#include <chrono>
#include <thread>
#include <iostream>

Napi::Boolean GetConnectivity(const Napi::CallbackInfo & info) {
    Napi::Env env = info.Env();
    CoInitialize(NULL);
    bool inetconnection = false;
    INetworkListManager *networkListManager = NULL;
    HRESULT hr = CoCreateInstance(CLSID_NetworkListManager, NULL, CLSCTX_ALL, IID_INetworkListManager, (LPVOID *)&networkListManager);
    if (SUCCEEDED(hr))
    {
        NLM_CONNECTIVITY result;
        hr = networkListManager->GetConnectivity(&result);
        if (SUCCEEDED(hr))
        {
            if (result & (NLM_CONNECTIVITY_IPV4_INTERNET | NLM_CONNECTIVITY_IPV6_INTERNET)) inetconnection = true;
        };
        networkListManager->Release();
    };
    return Napi::Boolean::New(env, inetconnection);
};

Napi::Object Init(Napi::Env env, Napi::Object exports) {
    exports.Set(Napi::String::New(env, "GetConnectivity"), Napi::Function::New(env, GetConnectivity));
    return exports;
};

NODE_API_MODULE(NODE_GYP_MODULE_NAME, Init);