74 lines
1.7 KiB
TypeScript
74 lines
1.7 KiB
TypeScript
// SPDX-License-Identifier: MIT
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export function parsePTR(ip: string) {
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if (ip.includes(".")) {
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// It's an IPv4 address
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const ptr = ip.split(".");
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let pop: string | undefined = "not undefined";
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let domain = "";
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do {
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pop = ptr.pop();
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if (pop) {
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domain += `${pop}.`;
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}
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} while (pop !== undefined);
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domain += "in-addr.arpa";
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return domain;
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} else if (ip.includes(":")) {
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const parsedIP = parseIPv6(ip);
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const ptr = parsedIP.split(":");
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// It's an IPv6 address
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let pop: string[] | undefined = ["e"];
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let domain = "";
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do {
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pop = ptr.pop()?.split("").reverse();
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if (pop) {
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for (const part of pop) {
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domain += `${part}.`;
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}
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}
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} while (pop !== undefined);
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domain += "ip6.arpa";
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return domain;
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} else {
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// It's not an address
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return "";
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}
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}
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export function parseIPv6(addr: string) {
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addr = addr.replace(/^:|:$/g, "");
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const ipv6 = addr.split(":");
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for (let i = 0; i < ipv6.length; i++) {
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let hex: string | string[] = ipv6[i];
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if (hex != "") {
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// normalize leading zeros
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// TODO: make this not deprecated
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ipv6[i] = ("0000" + hex).substr(-4);
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} else {
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// normalize grouped zeros ::
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hex = [];
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for (let j = ipv6.length; j <= 8; j++) {
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hex.push("0000");
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}
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ipv6[i] = hex.join(":");
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}
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}
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return ipv6.join(":");
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}
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export function parseNAPTR(phNum: string) {
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phNum = phNum.toString();
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phNum = phNum.replace("+", "").replaceAll(" ", "").replaceAll("-", "");
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const rev = phNum.split("").reverse();
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let ptr = "";
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rev.forEach((n) => {
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ptr += `${n}.`;
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});
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ptr += "e164.arpa";
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return ptr;
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}
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