Function isLoopback

lib/internal/net.js:90–99

* https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml * https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml * https://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.xhtml * @param {string

(host)

 * @returns {boolean}
 */
function isLoopback(host) {
  const hostLower = host.toLowerCase();

  return (
    hostLower === 'localhost' ||
    hostLower.startsWith('127.') ||
    hostLower === '[::1]' ||
    hostLower === '[0:0:0:0:0:0:0:1]'
  );
}

module.exports = {
  kReinitializeHandle: Symbol('kReinitializeHandle'),