pick-port/lib/udp.js

Get a free TCP or UDP port for the given IP address

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.reserve = reserve;
const dgram = require("node:dgram");
async function reserve(ip, port, family) {
    const server = dgram.createSocket(family === 4 ? 'udp4' : 'udp6');
    await new Promise((resolve, reject) => {
        server.unref();
        server.on('error', reject);
        server.bind({ address: ip, port, exclusive: true }, () => {
            server.close(() => resolve());
        });
    });
}