/**
 * Converts an IPv4 address in string notation to the
 * byte representation.
 */
export function ipv4StringToBuffer(host: string): Buffer {
  const parts = host.split('.');
  const result = Buffer.alloc(4);
  for (let i = 0; i < 4; i++) {
    result[i] = parseInt(parts[i]);
  }
  return result;
}