module.exports = function(RED) { "use strict"; var spawn = require('child_process').spawn; var plat = require('os').platform(); function PingNode(n) { RED.nodes.createNode(this,n); this.host = n.host; this.timer = n.timer * 1000; var node = this; node.tout = setInterval(function() { var ex; if (plat == "linux") { ex = spawn('ping', ['-n', '-w', '5', '-c', '1', node.host]); } else if (plat.match(/^win/)) { ex = spawn('ping', ['-n', '1', '-w', '5000', node.host]); } else if (plat == "darwin" || plat == "freebsd") { ex = spawn('ping', ['-n', '-t', '5', '-c', '1', node.host]); } else { node.error("Sorry - your platform - "+plat+" - is not recognised."); } var res = false; var line = ""; //var regex = /from.*time.(.*)ms/; var regex = /=.*[<|=]([0-9]*).*TTL|ttl..*=([0-9\.]*)/; ex.stdout.on('data', function (data) { line += data.toString(); }); //ex.stderr.on('data', function (data) { //console.log('[ping] stderr: ' + data); //}); ex.on('close', function (code) { var m = regex.exec(line)||""; if (m !== '') { if (m[1]) { res = Number(m[1]); } if (m[2]) { res = Number(m[2]); } } var msg = { payload:false, topic:node.host }; if (code === 0) { msg = { payload:res, topic:node.host }; } try { node.send(msg); } catch(e) {} }); }, node.timer); this.on("close", function() { if (this.tout) { clearInterval(this.tout); } }); } RED.nodes.registerType("ping",PingNode); }