263 lines
10 KiB
JavaScript
263 lines
10 KiB
JavaScript
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module.exports = function (RED) {
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"use strict";
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var snmp = require("net-snmp");
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var sessions = {};
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function getSession(host, community, version, timeout) {
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var sessionKey = host + ":" + community + ":" + version;
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var port = 161;
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if (host.indexOf(":") !== -1) {
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port = host.split(":")[1];
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host = host.split(":")[0];
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}
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if (!(sessionKey in sessions)) {
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sessions[sessionKey] = snmp.createSession(host, community, { port:port, version:version, timeout:(timeout || 5000) });
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}
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return sessions[sessionKey];
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}
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function SnmpNode(n) {
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RED.nodes.createNode(this, n);
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this.community = n.community;
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this.host = n.host;
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this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
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this.oids = n.oids.replace(/\s/g, "");
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this.timeout = Number(n.timeout || 5) * 1000;
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var node = this;
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this.on("input", function (msg) {
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var host = node.host || msg.host;
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var community = node.community || msg.community;
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var oids = node.oids || msg.oid;
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if (oids) {
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getSession(host, community, node.version, node.timeout).get(oids.split(","), function (error, varbinds) {
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if (error) {
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node.error(error.toString(), msg);
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}
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else {
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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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node.error(snmp.varbindError(varbinds[i]), msg);
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}
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else {
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if (varbinds[i].type == 4) { varbinds[i].value = varbinds[i].value.toString(); }
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varbinds[i].tstr = snmp.ObjectType[varbinds[i].type];
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//node.log(varbinds[i].oid + "|" + varbinds[i].tstr + "|" + varbinds[i].value);
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}
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}
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msg.oid = oids;
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msg.payload = varbinds;
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node.send(msg);
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}
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});
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}
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else {
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node.warn("No oid(s) to search for");
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}
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});
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}
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RED.nodes.registerType("snmp", SnmpNode);
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function SnmpSNode(n) {
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RED.nodes.createNode(this, n);
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this.community = n.community;
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this.host = n.host;
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this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
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this.varbinds = n.varbinds;
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this.timeout = Number(n.timeout || 5) * 1000;
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if (this.varbinds && this.varbinds.trim().length === 0) { delete this.varbinds; }
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var node = this;
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this.on("input", function (msg) {
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var host = node.host || msg.host;
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var community = node.community || msg.community;
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var varbinds = (node.varbinds) ? JSON.parse(node.varbinds) : msg.varbinds;
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if (varbinds) {
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for (var i = 0; i < varbinds.length; i++) {
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varbinds[i].type = snmp.ObjectType[varbinds[i].type];
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}
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getSession(host, community, node.version, node.timeout).set(varbinds, function (error, varbinds) {
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if (error) {
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node.error(error.toString(), msg);
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}
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else {
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for (var i = 0; i < varbinds.length; i++) {
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// for version 2c we must check each OID for an error condition
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if (snmp.isVarbindError(varbinds[i])) {
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node.error(snmp.varbindError(varbinds[i]), msg);
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}
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}
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}
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});
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}
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else {
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node.warn("No varbinds to set");
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}
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});
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}
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RED.nodes.registerType("snmp set", SnmpSNode);
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function SnmpTNode(n) {
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RED.nodes.createNode(this, n);
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this.community = n.community;
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this.host = n.host;
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this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
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this.oids = n.oids.replace(/\s/g, "");
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this.timeout = Number(n.timeout || 5) * 1000;
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var node = this;
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var maxRepetitions = 20;
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function sortInt(a, b) {
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if (a > b) { return 1; }
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else if (b > a) { return -1; }
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else { return 0; }
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}
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this.on("input", function (msg) {
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var host = node.host || msg.host;
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var community = node.community || msg.community;
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var oids = node.oids || msg.oid;
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if (oids) {
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msg.oid = oids;
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getSession(host, community, node.version, node.timeout).table(oids, maxRepetitions, function (error, table) {
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if (error) {
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node.error(error.toString(), msg);
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}
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else {
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var indexes = [];
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for (var index in table) {
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if (table.hasOwnProperty(index)) {
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indexes.push(parseInt(index));
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}
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}
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indexes.sort(sortInt);
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for (var i = 0; i < indexes.length; i++) {
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var columns = [];
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for (var column in table[indexes[i]]) {
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if (table[indexes[i]].hasOwnProperty(column)) {
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columns.push(parseInt(column));
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}
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}
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columns.sort(sortInt);
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// console.log("row index = " + indexes[i]);
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// for (var j = 0; j < columns.length; j++) {
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// console.log(" column " + columns[j] + " = " + table[indexes[i]][columns[j]]);
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// }
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}
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msg.payload = table;
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node.send(msg);
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}
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});
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}
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else {
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node.warn("No oid to search for");
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}
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});
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}
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RED.nodes.registerType("snmp table", SnmpTNode);
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function SnmpSubtreeNode(n) {
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RED.nodes.createNode(this, n);
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this.community = n.community;
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this.host = n.host;
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this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
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this.oids = n.oids.replace(/\s/g, "");
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this.timeout = Number(n.timeout || 5) * 1000;
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var node = this;
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var maxRepetitions = 20;
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var response = [];
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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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node.error(snmp.varbindError(varbinds[i]), msg);
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}
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else {
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//console.log(varbinds[i].oid + "|" + varbinds[i].value);
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response.push({ oid: varbinds[i].oid, value: varbinds[i].value });
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}
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}
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}
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this.on("input", function (msg) {
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var host = node.host || msg.host;
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var community = node.community || msg.community;
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var oids = node.oids || msg.oid;
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if (oids) {
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msg.oid = oids;
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getSession(host, community, node.version, node.timeout).subtree(msg.oid, maxRepetitions, feedCb, function (error) {
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if (error) {
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node.error(error.toString(), msg);
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}
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else {
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// Clone the array
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msg.payload = response.slice(0);
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node.send(msg);
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//Clears response
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response.length = 0;
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}
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});
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}
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else {
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node.warn("No oid to search for");
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}
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});
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}
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RED.nodes.registerType("snmp subtree", SnmpSubtreeNode);
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function SnmpWalkerNode(n) {
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RED.nodes.createNode(this, n);
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this.community = n.community;
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this.host = n.host;
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this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
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this.oids = n.oids.replace(/\s/g, "");
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this.timeout = Number(n.timeout || 5) * 1000;
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var node = this;
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var maxRepetitions = 20;
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var response = [];
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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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node.error(snmp.varbindError(varbinds[i]), msg);
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}
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else {
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//console.log(varbinds[i].oid + "|" + varbinds[i].value);
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response.push({ oid: varbinds[i].oid, value: varbinds[i].value });
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}
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}
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}
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this.on("input", function (msg) {
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node.msg = msg;
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var oids = node.oids || msg.oid;
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var host = node.host || msg.host;
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var community = node.community || msg.community;
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if (oids) {
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msg.oid = oids;
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getSession(host, community, node.version, node.timeout).walk(msg.oid, maxRepetitions, feedCb, function (error) {
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if (error) {
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node.error(error.toString(), msg);
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}
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else {
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// Clone the array
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msg.payload = response.slice(0);
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node.send(msg);
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//Clears response
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response.length = 0;
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}
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});
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}
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else {
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node.warn("No oid to search for");
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}
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});
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}
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RED.nodes.registerType("snmp walker", SnmpWalkerNode);
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};
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