var redis = require("redis"); var util = require('util'); var EventEmitter = require('events').EventEmitter; var exec = require('child_process').exec; var redisprefix = "ippoll:"; var IpPoll = function(switchaddr, hostsaddr) { var self = this; var redisClient = redis.createClient(); var regexp = /\(([0-9]+) hosts* up\)/; // var nmap = "nmap -n -sP -T5 --host-timeout 10ms "; var nmap = "nmap -n -sP -T5 "; redisClient.on("connect", function () { console.log("connected to redis"); self.emit('ready'); }); this.pollCount = function() { exec(nmap + "--min-hostgroup 10 " + hostsaddr, function (error, stdout, stderr) { if(error == null) { var matches = regexp.exec(stdout); if(matches != null && matches.length == 2) { var num = parseInt(matches[1]); redisClient.zadd('onlinecount', Date.now(), num, function() { self.emit('doneCount', num); }); } } }); }; this.pollState = function() { exec(nmap + switchaddr, function (error, stdout, stderr) { if(error == null) { var matches = regexp.exec(stdout); if(matches != null && matches.length == 2) { self.emit('doneState', matches[1] == "1"); } } else { self.emit('doneState', "unknown"); } }); }; }; util.inherits(IpPoll, EventEmitter); module.exports = IpPoll;