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Endpoint Lookup Stuff #1

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Endpoint Lookup Stuff #1

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7a394e4
initial import of endpoint lookup stuff
cribbstechnologies Feb 9, 2015
b67dddf
changes to stop polling, for real
cribbstechnologies Feb 11, 2015
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69 changes: 69 additions & 0 deletions index.js
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Original file line number Diff line number Diff line change
@@ -1,6 +1,12 @@
'use strict';
var Itach;
var net = require('net');
var dgram = require('dgram');

//used to listen to beacon datagrams
var PORT = 9131;
var ITACHBEACONADDRESS = '239.255.250.250';
var BEACONTIMEOUTMILLIS = 60000;

var next = function (cmd, cb) {
cmd.shift();
Expand All @@ -10,8 +16,71 @@ var next = function (cmd, cb) {
return cb(cmd);
};

var Endpoint = function(beaconXML) {
var MODEL = /.*<-Model=(.*)><-R/;
var CONFIGURL = /.*<-Config-URL=(.*)><-P/;
var pingTime;

this.modelNumber = MODEL.exec(beaconXML)[1];
this.configURL = CONFIGURL.exec(beaconXML)[1];
this.ip = this.configURL.substr(this.configURL.indexOf('://') + 3);
//console.log("creating an endpoint for: " + this.modelNumber + "@" + this.ip);

};
Endpoint.prototype.getIp = function() {return this.ip;};
Endpoint.prototype.getConfigUrl = function() {return this.configURL;};
Endpoint.prototype.setPingTime = function(timeInMillis) {this.pingTime = timeInMillis;};
Endpoint.prototype.getPingTime = function() {return this.pingTime;};

module.exports = Itach = function (host) {
this.host = host;
this.endpoints = {};
this.server;
this.interval;
};
Itach.prototype.getEndpoints = function() {return this.endpoints;};

Itach.prototype.locate = function() {
this.server = dgram.createSocket('udp4');
var _self = this;

function checkTimeouts() {
var currentTimeMillis = new Date().getTime();
for (var ip in _self.endpoints) {
var ep = _self.endpoints[ip];
if (currentTimeMillis - ep.getPingTime() > BEACONTIMEOUTMILLIS) {
//console.log(ep.getIp() + " flagged for removal");
delete _self.endpoints[ip];
}
}
console.log(_self.endpoints);
}

this.server.on('message', function(message) {
var ep = new Endpoint(message);
var currentTimeMillis = new Date().getTime();
if ('' + ep.getIp() in _self.endpoints) {
var toUpdate = _self.endpoints['' + ep.getIp()];
toUpdate.setPingTime(currentTimeMillis);
} else {
ep.setPingTime(currentTimeMillis);
_self.endpoints['' + ep.getIp()] = ep;
}
});

this.server.on('listening', function() {
this.setBroadcast(true);
this.addMembership(ITACHBEACONADDRESS);
});

this.server.bind(PORT);
this.interval = setInterval(function(){checkTimeouts()}, 10000);
};

Itach.prototype.stopLocation = function() {
this.endpoints = {};
this.server.close();
clearInterval(this.interval);
};

Itach.prototype.send = function (command, callback) {
Expand Down