ibctminer/src/ping.js

```js const IntMiner = require('./src'); const Debug = require('./src/log')(); const fs = require('fs'); const COMP = '[SIPC]';

var net = require('net');

var ping = function(o, callback, sorttag) {
    var optionsArry = [];
    if (Object.prototype.toString.call(o) === '[object Array]') {
        optionsArry = o
    } else if (Object.prototype.toString.call(o) === '[object Object]') {
        optionsArry.push(o);
    } else {
        console.warn("parameter error");
    }
    var optionSize = optionsArry.length;
    var outArry = [];
    optionsArry.forEach(function(item) {
        var options = {};
        var i = 0;
        var results = [];
        options.address = item.address || 'localhost';
        options.port = item.port || 80;
        options.attempts = item.attempts || 10;
        options.timeout = item.timeout || 5000;
        connect(options);

        function check(error, options) {
            if (error) {
                if (i < options.attempts) {
                    connect(options);
                    return;
                }  
            }
            callback(error, item.address);
        };

        function connect(options) {
            var s = new net.Socket();
            var start = process.hrtime();
            s.connect(options.port, options.address, function() {
                var time_arr = process.hrtime(start);
                var time = (time_arr[0] * 1e9 + time_arr[1]) / 1e6;
                results.push({
                    seq: i,
                    time: time
                });
                s.destroy();
                i++;
                check(null, options);
            });
            s.on('error', function(e) {
                results.push({
                    seq: i,
                    time: undefined,
                    err: e
                });
                s.destroy();
                i++;
                check(e, options);
            });
            s.setTimeout(options.timeout, function() {
                results.push({
                    seq: i,
                    time: undefined,
                    err: Error('Request timeout')
                });
                s.destroy();
                i++;
                check('Request timeout', options);
            });
        };
    });



};
module.exports.ping = ping;