ip-broadcast.js

var ip = require( 'ip' );
var IP = exports

IP.addressInfo = function(name, family) {
  var os = require( 'os' );
  var family = 'ipv4';
  var interfaces = os.networkInterfaces( );

  // console.log( interfaces );
  var all = Object.keys(interfaces).map(function (nic) {
    //
    // Note: name will only be `public` or `private`
    // when this is called.
    //
    var addresses = interfaces[nic].filter(function (details) {
      details.family = details.family.toLowerCase();
      // console.log('name',name);
      if (details.family !== family || ip.isLoopback(details.address)) {
        return false;
      } else if (!name) {
        return true;
      }

      return name === 'public' ? ip.isPrivate(details.address) : ip.isPublic(details.address);
    });

    return addresses.length ? addresses[0] : undefined;
  }).filter(Boolean);
  
  return all.length ? all[0] : undefined;
}

IP.broadcastAddress = function(name, family) {
  var _Address = this.addressInfo()
  return ip.subnet(_Address.address, _Address.netmask).broadcastAddress
}