145 lines
4.5 KiB
JavaScript
145 lines
4.5 KiB
JavaScript
/*
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* Simple DNS Server
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* For testing DNS monitoring type, dev only
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*/
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const dns2 = require("dns2");
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const { Packet } = dns2;
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const server = dns2.createServer({
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udp: true
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});
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server.on("request", (request, send, rinfo) => {
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for (let question of request.questions) {
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console.log(question.name, type(question.type), question.class);
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const response = Packet.createResponseFromRequest(request);
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if (question.name === "existing.com") {
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if (question.type === Packet.TYPE.A) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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address: "1.2.3.4"
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});
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} else if (question.type === Packet.TYPE.AAAA) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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address: "fe80::::1234:5678:abcd:ef00",
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});
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} else if (question.type === Packet.TYPE.CNAME) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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domain: "cname1.existing.com",
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});
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} else if (question.type === Packet.TYPE.MX) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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exchange: "mx1.existing.com",
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priority: 5
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});
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} else if (question.type === Packet.TYPE.NS) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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ns: "ns1.existing.com",
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});
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} else if (question.type === Packet.TYPE.SOA) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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primary: "existing.com",
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admin: "admin@existing.com",
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serial: 2021082701,
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refresh: 300,
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retry: 3,
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expiration: 10,
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minimum: 10,
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});
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} else if (question.type === Packet.TYPE.SRV) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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priority: 5,
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weight: 5,
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port: 8080,
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target: "srv1.existing.com",
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});
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} else if (question.type === Packet.TYPE.TXT) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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data: "#v=spf1 include:_spf.existing.com ~all",
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});
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} else if (question.type === Packet.TYPE.CAA) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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flags: 0,
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tag: "issue",
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value: "ca.existing.com",
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});
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}
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}
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if (question.name === "4.3.2.1.in-addr.arpa") {
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if (question.type === Packet.TYPE.PTR) {
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response.answers.push({
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name: question.name,
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type: question.type,
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class: question.class,
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ttl: 300,
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domain: "ptr1.existing.com",
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});
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}
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}
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send(response);
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}
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});
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server.on("listening", () => {
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console.log("Listening");
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console.log(server.addresses());
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});
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server.on("close", () => {
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console.log("server closed");
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});
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server.listen({
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udp: 5300
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});
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function type(code) {
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for (let name in Packet.TYPE) {
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if (Packet.TYPE[name] === code) {
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return name;
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}
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}
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}
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