Parse ARP details from table TODO: Validate and format IP and MAC Addresses
function parseArpTable (arpStr) {
  var arpArr = []
  var arpt = arpStr.join()
  arpt = arpt.split('\n')
  var x
  for (x in arpt) {
    var entry = arpt[x]
    var arpObj = {}

    // Get the IP from the "(1.2.3.4)" fromat
    var ipStart = entry.indexOf('(')
    if (ipStart === -1) {
      continue
    }
    var ipEnd = entry.indexOf(')')
    var ip = entry.slice(ipStart + 1, ipEnd)
    arpObj['ip'] = ip

    // Get the Corresponding MAC Addres by splitting
    var mac = entry.split(' ')[3]

    // make sure MAC addresses are in lowercase
    mac = mac.toLowerCase()

    // make sure octets have a leading zero
    var macSplited = mac.split(':')
    for (var i in macSplited) {
      if (macSplited.hasOwnProperty(i)) {
        if (macSplited[i].length === 1) {
          macSplited[i] = '0' + macSplited[i]
        }
      }
    }

    // join octets again
    mac = macSplited.join(':')

    arpObj['mac'] = mac

    arpArr.push(arpObj)
  }

  return arpArr
}