72 lines
2.1 KiB
JavaScript
72 lines
2.1 KiB
JavaScript
var redis = require("redis");
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var util = require('util');
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var EventEmitter = require('events').EventEmitter;
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var exec = require('child_process').exec;
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var moment = require('moment');
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var redisprefix = "ippoll:";
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var IpPoll = function(switchaddr, hostsaddr) {
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var self = this;
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var redisClient = redis.createClient();
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var regexp = /\(([0-9]+) hosts* up\)/;
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var nmap = "nmap -n -sP ";
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redisClient.on("connect", function () {
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console.log("IP-Poll: connected to redis");
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self.emit('ready');
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});
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this.pollCount = function() {
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exec(nmap + "--min-hostgroup 10 " + hostsaddr, function (error, stdout, stderr) {
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if(error == null) {
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var matches = regexp.exec(stdout);
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if(matches != null && matches.length == 2) {
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var time = Date.now();
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redisClient.zremrangebyscore(redisprefix + 'onlinecount', "-inf", time - 7*24*60*1000);
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var num = matches[1];
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redisClient.zadd(redisprefix + 'onlinecount', time, time + "|" + num, function() {
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self.emit('doneCount', parseInt(num));
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});
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}
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}
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});
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};
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this.pollState = function() {
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exec(nmap + switchaddr, function (error, stdout, stderr) {
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if(error == null) {
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var matches = regexp.exec(stdout);
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if(matches != null && matches.length == 2) {
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self.emit('doneState', matches[1] == "1");
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}
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} else {
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self.emit('doneState', "unknown");
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}
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});
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};
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this.getHistory = function(start, end, callback) {
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redisClient.zrangebyscore(redisprefix + 'onlinecount', "-inf", "+inf", function(err, replies) {
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var data = [];
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replies.forEach(function (reply, i) {
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var line = reply.split('|');
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data.push( { at: moment(parseInt(line[0])).format(), value: line[1] });
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});
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callback(data);
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});
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};
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};
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util.inherits(IpPoll, EventEmitter);
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module.exports = IpPoll;
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