ntpsync/distribution/ntpSyncTest.js

Calculate the delta between local clock and NTP time, via multiple requests to various servers in the server pool

"use strict";

var ntpsync = require('./ntpsync');

var ntpBurstConfig = {
    fServerCarousel: ["0.pool.ntp.org", "1.pool.ntp.org", "2.pool.ntp.org", "3.pool.ntp.org", "0.us.pool.ntp.org", "1.us.pool.ntp.org", "2.us.pool.ntp.org", "3.us.pool.ntp.org", "0.europe.pool.ntp.org", "1.europe.pool.ntp.org", "2.europe.pool.ntp.org", "3.europe.pool.ntp.org"],
    fTimeoutLatencyMS: 300,
    fRequestedSuccessfulSampleCount: 8,
    fBurstTimeoutMS: 6000
};

var nistBurstConfig = {
    fServerCarousel: ["utcnist.colorado.edu", "time-a.nist.gov", "time-b.nist.gov", "time-c.nist.gov", "time-d.nist.gov", "time.nist.gov"],
    fTimeoutLatencyMS: 500,
    fRequestedSuccessfulSampleCount: 4,
    fBurstTimeoutMS: 6000
};

var logNTPSyncResult = function logNTPSyncResult(iNTPData) {
    console.log("\"(Local Time - NTP Time) Delta = " + iNTPData.minimalNTPLatencyDelta + " ms\"");
    console.log("\"Corresponding Minimal Ping Latency was " + iNTPData.minimalNTPLatency + " ms\"");
    console.log("\"Calculated from " + iNTPData.totalSampleCount + " successful NTP Pings\"");

    var localClockTimeMS = Date.now();

    var adjustedClockTimeMS = localClockTimeMS - iNTPData.minimalNTPLatencyDelta;

    var localClockDateString = new Date(localClockTimeMS).toISOString();
    var adjustedlocalClockDateString = new Date(adjustedClockTimeMS).toISOString();

    console.log("Local UTC Clock Time: " + localClockDateString);
    console.log("Adjusted Local UTC Clock Time: " + adjustedlocalClockDateString);
};

var reportNTPSyncError = function reportNTPSyncError(iErr) {
    console.log(iErr);
};

var chainableNTPReport = function chainableNTPReport(iNTPData) {
    return new Promise(function (iResolve) {
        console.log("NTP DATA:");
        logNTPSyncResult(iNTPData);
        iResolve();
    });
};

var chainableNISTReport = function chainableNISTReport(iNTPData) {
    return new Promise(function (iResolve) {
        console.log("NIST DATA:");
        logNTPSyncResult(iNTPData);
        iResolve();
    });
};

var chainableNTPQuery = function chainableNTPQuery() {
    return ntpsync.ntpLocalClockDeltaPromise(ntpBurstConfig);
};
var chainableNISTQuery = function chainableNISTQuery() {
    return ntpsync.ntpLocalClockDeltaPromise(nistBurstConfig);
};
//
chainableNTPQuery().then(chainableNTPReport).then(chainableNISTQuery).then(chainableNISTReport).catch(reportNTPSyncError);

// WARNING: This would get you an error since no concurrent NTPSYNC requests are allowed.

// ntpsync.ntpLocalClockDeltaPromise().then((iNTPData) => {
//     console.log("1 OK");
// }).catch((err) => {
//     console.log("1 failed : " + err);
// });
// ntpsync.ntpLocalClockDeltaPromise().then((iNTPData) => {
//     console.log("2 OK");
// }).catch((err) => {
//     console.log("2 failed : " + err);
// });