118 lines
3.2 KiB
TypeScript
118 lines
3.2 KiB
TypeScript
// SPDX-License-Identifier: MIT
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import {
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isCAA,
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isMX,
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isNAPTR,
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isSOA,
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isSRV,
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isTXT,
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QueryResponse,
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} from "./utils.ts";
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/**
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* @param res A DNS {@link QueryResponse}
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* @param domain The domain (or IP, if doing it in reverse) queried
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* @param query The DNS query that was queried
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* @returns {string} The DNS response, put in canonical form
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*/
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export function parseResponse(
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res: QueryResponse,
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domain: string,
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query: string,
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short: boolean,
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): string[] {
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const answer: string[] = [];
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switch (query) {
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case "A":
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case "AAAA":
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case "CNAME":
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case "NS":
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case "PTR":
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res.dnsResponse.forEach((ip) => {
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let dnsQuery = "";
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if (!short) dnsQuery += `${domain} IN ${query} `;
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dnsQuery += `${ip}`;
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answer.push(dnsQuery);
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});
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break;
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case "MX":
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if (isMX(res.dnsResponse)) {
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res.dnsResponse.forEach((record) => {
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let dnsQuery = "";
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if (!short) {
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dnsQuery += `${domain} IN ${query} `;
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}
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dnsQuery += `${record.preference} ${record.exchange}`;
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answer.push(dnsQuery);
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});
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}
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break;
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case "CAA":
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if (isCAA(res.dnsResponse)) {
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res.dnsResponse.forEach((record) => {
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let dnsQuery = "";
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if (!short) {
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dnsQuery += `${domain} IN ${query} `;
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}
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dnsQuery += `${
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record.critical ? "1" : "0"
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} ${record.tag} "${record.value}"`;
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answer.push(dnsQuery);
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});
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}
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break;
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case "NAPTR":
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if (isNAPTR(res.dnsResponse)) {
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res.dnsResponse.forEach((record) => {
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let dnsQuery = "";
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if (!short) dnsQuery += `${domain} IN ${query} `;
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dnsQuery +=
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`${record.order} ${record.preference} "${record.flags}" "${record.services}" ${record.regexp} ${record.replacement}`;
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answer.push(dnsQuery);
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});
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}
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break;
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case "SOA":
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if (isSOA(res.dnsResponse)) {
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res.dnsResponse.forEach((record) => {
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let dnsQuery = "";
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if (!short) dnsQuery += `${domain} IN ${query} `;
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dnsQuery +=
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`${record.mname} ${record.rname} ${record.serial} ${record.refresh} ${record.retry} ${record.expire} ${record.minimum}`;
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answer.push(dnsQuery);
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});
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}
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break;
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case "SRV":
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if (isSRV(res.dnsResponse)) {
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res.dnsResponse.forEach((record) => {
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let dnsQuery = "";
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if (!short) dnsQuery += `${domain} IN ${query} `;
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dnsQuery +=
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`${record.priority} ${record.weight} ${record.port} ${record.target}`;
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answer.push(dnsQuery);
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});
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}
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break;
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case "TXT":
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if (isTXT(res.dnsResponse)) {
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res.dnsResponse.forEach((record) => {
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let dnsQuery = "";
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let txt = "";
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record.forEach((value) => {
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txt += `"${value}"`;
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});
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if (!short) {
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dnsQuery += `${domain} IN ${query} `;
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}
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dnsQuery += `${txt}`;
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answer.push(dnsQuery);
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});
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}
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break;
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default:
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throw new Error("Not yet implemented");
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}
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return answer;
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}
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