_connection = {}

config   = require "config"
ident    = require "ident" 
arpcache = require "arpcache"

function _connection.auth(serv, localport, remoteport)

  local user = config.map_ip(serv)
  local mac = nil
  
  if not user then
    mac = arpcache.get_mac(serv)
    if mac then
      user = config.map_mac(mac)
    end  
  end

  if user == "*ident" then
    user = ident.resolve(serv,localport,config.map_port(remoteport))
  end  

  return user

end

return _connection