108 lines
2.8 KiB
JavaScript
108 lines
2.8 KiB
JavaScript
var redis = require("redis");
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var snmp = require("net-snmp");
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var util = require('util');
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var EventEmitter = require('events').EventEmitter;
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var _u = require("underscore");
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var redisprefix = "mac:";
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var SnmpMac = function(hostname, community) {
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var self = this;
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var redisClient = redis.createClient();
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var session = snmp.createSession(hostname, community, { version: snmp.Version2c } );
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var baseoid = "1.3.6.1.2.1.17.7.1.2.2.1.3";
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var regexp = /([0-9]+).([0-9]+).([0-9]+).([0-9]+).([0-9]+).([0-9]+)$/;
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var names = [];
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redisClient.on("connect", function () {
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redisClient.set(redisprefix + "24:77:03:a9:f3:f4","lucas");
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redisClient.set(redisprefix + "3c:97:0e:22:b7:68","lucas");
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redisClient.set(redisprefix + "a0:0b:ba:c7:98:e5","lucas");
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redisClient.set(redisprefix + "b8:27:eb:7d:6f:d2","rpi2");
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redisClient.set(redisprefix + "b8:27:eb:7b:9b:9a","rpi3");
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redisClient.set(redisprefix + "a8:88:08:10:a0:c5","pascal");
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redisClient.set(redisprefix + "c8:97:9f:72:8f:67","fisch");
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redisClient.set(redisprefix + "00:80:a3:91:39:1c","ripe-atlas-probe");
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redisClient.set(redisprefix + "d4:ca:6d:33:cf:79","routerboard");
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console.log("connected to redis");
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self.emit('ready');
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});
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redisClient.on('error', function(err) {
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console.log("redis error: " + err);
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});
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function getMacFromOID(oid, callback) {
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var matches = regexp.exec(oid);
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var mac = "";
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if(matches != null) {
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for(var i = 1; i < matches.length; i++) {
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var num = parseInt(matches[i]);
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if(num <= 15) mac += "0";
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mac += num.toString(16) + ":";
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}
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mac = mac.substr(0, mac.length-1);
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callback(mac);
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}
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}
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function doneCb(error) {
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if (error)
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console.error(error.toString ());
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self.emit('done', _u.uniq(names));
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}
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function feedCb(varbinds) {
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for (var i = 0; i < varbinds.length; i++) {
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if (snmp.isVarbindError(varbinds[i])) {
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console.error(snmp.varbindError (varbinds[i]));
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} else {
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if(varbinds[i].value == "3") { // only valid arp entries
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getMacFromOID(varbinds[i].oid, function(mac) {
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// console.log(mac);
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redisClient.get(redisprefix + mac, function(err, reply) {
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if(reply != null) {
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names.push(reply);
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}
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});
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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.poll = function() {
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names.length = 0;
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session.subtree(baseoid, 20, feedCb, doneCb);
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};
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this.stop = function() {
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redisClient.quit();
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};
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this.add = function (mac, name, callback) {
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redisClient.set(redisprefix + mac, name, function (err) {
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if(typeof callback === "function") callback(err);
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});
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};
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this.delete = function(mac, callback) {
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redisClient.del(redisprefix + mac, function(err) {
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if(typeof callback === "function") callback(err);
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});
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};
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};
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util.inherits(SnmpMac, EventEmitter);
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module.exports = SnmpMac;
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