From 75a8232c86f6bc41df0dc93321543f10629525d5 Mon Sep 17 00:00:00 2001
From: Igor Pashev <pashev.igor@gmail.com>
Date: Wed, 17 Mar 2021 10:26:29 +0200
Subject: Use getAddrInfo instead of inet_addr

---
 src/Server.hs | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/src/Server.hs b/src/Server.hs
index 14d7579..a61bd8e 100644
--- a/src/Server.hs
+++ b/src/Server.hs
@@ -9,21 +9,28 @@ import Data.Pool (createPool, destroyAllResources)
 import Database.MySQL.Base (ConnectInfo)
 import qualified Database.MySQL.Simple as MySQL
 import Network.Socket
-  ( Family(AF_INET, AF_UNIX)
-  , SockAddr(SockAddrInet, SockAddrUnix)
+  ( AddrInfoFlag(AI_NUMERICSERV)
+  , Family(AF_UNIX)
+  , SockAddr(SockAddrUnix)
   , Socket
   , SocketOption(ReuseAddr)
   , SocketType(Stream)
+  , addrAddress
+  , addrFamily
+  , addrFlags
+  , addrProtocol
+  , addrSocketType
   , bind
   , close
+  , defaultHints
+  , getAddrInfo
   , getSocketName
-  , inet_addr
   , listen
   , maxListenQueue
   , setSocketOption
   , socket
   )
-import Network.Wai.Handler.Warp (Port, defaultSettings, runSettingsSocket)
+import Network.Wai.Handler.Warp (defaultSettings, runSettingsSocket)
 import System.IO (hPutStrLn, stderr)
 import System.IO.Error (isDoesNotExistError)
 import System.Posix.Files
@@ -73,12 +80,15 @@ createSocket (Socket path) = do
   hPutStrLn stderr $ "Listening on UNIX socket `" ++ path ++ "'"
   return sock
 createSocket (Port port) = do
-  sock <- socket AF_INET Stream 0
+  addr:_ <- getAddrInfo (Just hints) (Just "localhost") (Just svc)
+  sock <- socket (addrFamily addr) (addrSocketType addr) (addrProtocol addr)
   setSocketOption sock ReuseAddr 1
-  addr <- inet_addr "127.0.0.1"
-  bind sock $ SockAddrInet (fromIntegral port) addr
+  bind sock $ addrAddress addr
   hPutStrLn stderr $ "Listening on localhost:" ++ show port
   return sock
+  where
+    svc = show port
+    hints = defaultHints {addrFlags = [AI_NUMERICSERV], addrSocketType = Stream}
 
 closeSocket :: Socket -> IO ()
 closeSocket sock = do
-- 
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