equivalent of INET_ATON() in mongodb - node.js

Question

What is the equivalent of INET_ATON() in mongodb? I am using nodejs with mongodb so if a equivalent in nodejs is avaliable than it is good enough.

Answer 1

// ip example: 192.168.2.1
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
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('.');
}
http://rolfrost.de/ipjs.html

Answer 2

Here's someone else's solution for converting an IP address from a dotted-decimal string to a 32-bit number:
function dot2num(dot)
{
var d = dot.split('.');
return ((((((+d[0])*256)+(+d[1]))*256)+(+d[2]))*256)+(+d[3]);
}
From here: IP-addresses stored as int results in overflow?

Answer 3

function inet_aton(ip){
var a = new Array();
a = ip.split('.');
return((a[0] << 24) >>> 0) + ((a[1] << 16) >>> 0) + ((a[2] << 8) >>> 0) + (a[3] >>> 0);
}
function inet_ntoa(n){
var a = ((n >> 24) & 0xFF) >>> 0;
var b = ((n >> 16) & 0xFF) >>> 0;
var c = ((n >> 8) & 0xFF) >>> 0;
var d = (n & 0xFF) >>> 0;
return(a + "." + b + "." + c + "." + d);
}
as of my site see below/above, compatible with older browsers.

Answer 4

Here's a version of the ntoa function in Javascript using typed arrays.
function ntoa(ipInt) {
var buffer = new ArrayBuffer(4);
var uint8View = new Uint8Array(buffer);
var uint32View = new Uint32Array(buffer);
uint32View[0] = ipInt;
var ipSegments = [];
for (var i = 0; i < uint8View.length; i ++) {
ipSegments.push(uint8View[i]);
}
return ipSegments.join(".");
}