{-# LANGUAGE DeriveDataTypeable #-}
module Main where

import Control.Monad
import System.ZMQ3
import System.Console.CmdArgs.Implicit

data Echo = Echo
  { address :: String
  } deriving (Show, Data, Typeable)

opts = Echo { address = def &= help "address to connect"
            }
            &= summary "Echo"

main :: IO ()
main = do
    o <- cmdArgs opts
    withContext 2 $ \ctx ->
        withSocket ctx Rep $ \sck -> do
            bind sck (address o)
            forever $ receive sck >>= send sck []