распаковка пакета

require"pack"
pkts = {}
pkts.HRS = function(packet)
  local self = {}
  local _
  self.unpack = function(...)
    local _ = {...}; if (_[1] == self) then table.remove(_,1); end
    local packet = unpack(_)
    _, self.pkt, self.laps, self.quals = string.unpack(packet, "zbb")
  end
  return self
end

p = "HRS\0"..string.char(20)..string.char(5)
HRS = pkts.HRS(p)
HRS.unpack(p)
print(HRS.pkt, HRS.laps)