/**
 * @param {string} val
 * @returns {boolean}
 */
function isValidSubnetMask(val: string) {
  const reg =
    /^(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])(?:\.(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])){3}$/;

  return reg.test(val);
}

export default isValidSubnetMask;