IP to integer and integer to IP

ipConvert.js

// ip example: "192.168.2.1"
module.exports = function inet_aton(ip) {
  // split into octets
  var a = ip.split(".");
  var buffer = new ArrayBuffer(4);
  var dv = new DataView(buffer);
  for (var i = 0; i < 4; i++) {
    dv.setUint8(i, a[i]);
  }
  return dv.getUint32(0);
};

// num example: "3232236033"
module.exports = function inet_ntoa(num) {
  var nbuffer = new ArrayBuffer(4);
  var ndv = new DataView(nbuffer);
  ndv.setUint32(0, num);

  var a = new Array();
  for (var i = 0; i < 4; i++) {
    a[i] = ndv.getUint8(i);
  }
  return a.join(".");
};