Get private ipv4 address

ipv4.scala

import java.net.{Inet4Address, InetAddress, NetworkInterface}
import scala.collection.JavaConversions._

def privateIPv4: Option[String] = NetworkInterface.getNetworkInterfaces
  .filter(iface => iface.isUp && !iface.isLoopback && iface.getInetAddresses.hasMoreElements)
  .foldLeft(List.empty[InetAddress])((acc, iface) =>
    iface.getInetAddresses.foldLeft(acc) { (addresses, address) => address :: addresses }
  )
  .filter(_.isInstanceOf[Inet4Address])
  .filter(_.isSiteLocalAddress)
  .map(_.getHostName)
  .headOption