/** * Copyright 2014 IBM Corp. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. **/ module.exports = function(RED) { "use strict"; var snmp = require ("net-snmp"); function SnmpNode(n) { RED.nodes.createNode(this,n); this.community = n.community || "public"; this.host = n.host || "127.0.0.1"; this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1; this.oids = n.oids.replace(/\s/g,""); this.session = snmp.createSession (this.host, this.community, {version: this.version}); var node = this; this.on("input",function(msg) { var oids = node.oids || msg.oid; if (oids) { node.session.get(oids.split(","), function(error, varbinds) { if (error) { node.error(error.toString()); } else { for (var i = 0; i < varbinds.length; i++) { if (snmp.isVarbindError (varbinds[i])) { node.error(snmp.varbindError (varbinds[i])); } else { if (varbinds[i].type == 4) { varbinds[i].value = varbinds[i].value.toString(); } varbinds[i].tstr = snmp.ObjectType[varbinds[i].type]; //node.log(varbinds[i].oid + "|" + varbinds[i].tstr + "|" + varbinds[i].value); } } msg.oid = oids; msg.payload = varbinds; node.send(msg); } }); } else { node.warn("No oid(s) to search for"); } }); } RED.nodes.registerType("snmp",SnmpNode); function SnmpTNode(n) { RED.nodes.createNode(this,n); this.community = n.community || "public"; this.host = n.host || "127.0.0.1"; this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1; this.oids = n.oids.replace(/\s/g,""); this.session = snmp.createSession (this.host, this.community, {version: this.version}); var node = this; var maxRepetitions = 20; function sortInt (a, b) { if (a > b) { return 1; } else if (b > a) { return -1; } else { return 0; } } function responseCb (error, table) { if (error) { console.error (error.toString ()); } else { var indexes = []; for (var index in table) { if (table.hasOwnProperty(index)) { indexes.push (parseInt (index)); } } indexes.sort (sortInt); for (var i = 0; i < indexes.length; i++) { var columns = []; for (var column in table[indexes[i]]) { if (table[indexes[i]].hasOwnProperty(column)) { columns.push(parseInt (column)); } } columns.sort(sortInt); console.log ("row index = " + indexes[i]); for (var j = 0; j < columns.length; j++) { console.log (" column " + columns[j] + " = " + table[indexes[i]][columns[j]]); } } msg.payload = table; node.send(msg); } } this.on("input",function(msg) { var oids = node.oids || msg.oid; if (oids) { msg.oid = oids; node.session.table(oids, maxRepetitions, responseCb); } else { node.warn("No oid to search for"); } }); } RED.nodes.registerType("snmp table",SnmpTNode); }