Simple TCP client on Haskell

C8Client2.hs

---
-- kreed131.blogspot.com/2011/07/tcp.html
---

import Network.Socket hiding (send, sendTo, recv, recvFrom)
import Network.Socket.ByteString (send, recv)
import qualified Data.ByteString.Char8 as B8

import System.Environment (getArgs)

main :: IO ()
main = do
  [host', port'] <- getArgs
  client host' (read port' :: Int)

client :: String -> Int -> IO ()
client host port = withSocketsDo $ do
                addrInfo <- getAddrInfo Nothing (Just host) (Just $ show port)
                let serverAddr = head addrInfo
                sock <- socket (addrFamily serverAddr) Stream defaultProtocol
                connect sock (addrAddress serverAddr)
                msgSender sock
                sClose sock

msgSender :: Socket -> IO ()
msgSender sock = do
  msg <- B8.getLine
  send sock msg
  rMsg <- recv sock 10
  B8.putStrLn rMsg
  if msg == B8.pack "q" then putStrLn "Disconnected!" else msgSender sock

Fails to connect, can be fixed by replacing "localhost" with "127.0.0.1".