IP-addresses stored as int results in overflow?

Question

I\'m writing a chat-server in node.js, and I want to store connected users IP-addresses in a mysql database as (unsigned) integers. I have written a javascript method to convert

Answer 1

You might also find this pattern useful:

ip.toLong = function toInt(ip){
  var ipl=0;
  ip.split('.').forEach(function( octet ) {
      ipl<<=8;
      ipl+=parseInt(octet);
  });
  return(ipl >>>0);
};

ip.fromLong = function fromInt(ipl){
  return ( (ipl>>>24) +'.' +
      (ipl>>16 & 255) +'.' +
      (ipl>>8 & 255) +'.' +
      (ipl & 255) );
};

If you're using something like node.js where you can add functionality through something like Npm then you can simply do:

npm install ip

To get that functionality from the source which is here:
https://github.com/indutny/node-ip/blob/master/lib/ip.js

You will also get a bunch of other IP utility functions with that.