{-# LINE 1 "Network/Socket.hsc" #-}
{-# LANGUAGE CPP #-}
{-# LINE 2 "Network/Socket.hsc" #-}
{-# OPTIONS_GHC -fno-warn-orphans -fno-warn-unused-do-bind #-}
-----------------------------------------------------------------------------
-- |
-- Module      :  Network.Socket
-- Copyright   :  (c) The University of Glasgow 2001
-- License     :  BSD-style (see the file libraries/network/LICENSE)
-- 
-- Maintainer  :  libraries@haskell.org
-- Stability   :  provisional
-- Portability :  portable
--
-- The "Network.Socket" module is for when you want full control over
-- sockets.  Essentially the entire C socket API is exposed through
-- this module; in general the operations follow the behaviour of the C
-- functions of the same name (consult your favourite Unix networking book).
--
-- A higher level interface to networking operations is provided
-- through the module "Network".
--
-----------------------------------------------------------------------------


{-# LINE 24 "Network/Socket.hsc" #-}

-- NOTE: ##, we want this interpreted when compiling the .hs, not by hsc2hs.
#include "Typeable.h"

-- In order to process this file, you need to have CALLCONV defined.

module Network.Socket
    (
    -- * Types
      Socket(..)
    , Family(..)         
    , SocketType(..)
    , SockAddr(..)
    , SocketStatus(..)
    , HostAddress

{-# LINE 40 "Network/Socket.hsc" #-}
    , HostAddress6
    , FlowInfo
    , ScopeID

{-# LINE 44 "Network/Socket.hsc" #-}
    , ShutdownCmd(..)
    , ProtocolNumber
    , defaultProtocol
    , PortNumber(..)
    -- PortNumber is used non-abstractly in Network.BSD.  ToDo: remove
    -- this use and make the type abstract.

    -- * Address operations

    , HostName
    , ServiceName


{-# LINE 57 "Network/Socket.hsc" #-}
    , AddrInfo(..)

    , AddrInfoFlag(..)
    , addrInfoFlagImplemented

    , defaultHints

    , getAddrInfo

    , NameInfoFlag(..)

    , getNameInfo

{-# LINE 70 "Network/Socket.hsc" #-}

    -- * Socket operations
    , socket

{-# LINE 74 "Network/Socket.hsc" #-}
    , socketPair

{-# LINE 76 "Network/Socket.hsc" #-}
    , connect
    , bindSocket
    , listen
    , accept
    , getPeerName
    , getSocketName


{-# LINE 84 "Network/Socket.hsc" #-}
    -- get the credentials of our domain socket peer.
    , getPeerCred

{-# LINE 87 "Network/Socket.hsc" #-}

    , socketPort

    , socketToHandle

    -- ** Sending and receiving data
    -- $sendrecv
    , sendTo
    , sendBufTo

    , recvFrom
    , recvBufFrom
    
    , send
    , recv
    , recvLen

    , inet_addr
    , inet_ntoa

    , shutdown
    , sClose

    -- ** Predicates on sockets
    , sIsConnected
    , sIsBound
    , sIsListening
    , sIsReadable
    , sIsWritable

    -- * Socket options
    , SocketOption(..)
    , getSocketOption
    , setSocketOption

    -- * File descriptor transmission

{-# LINE 124 "Network/Socket.hsc" #-}
    , sendFd
    , recvFd

    -- Note: these two will disappear shortly
    , sendAncillary
    , recvAncillary


{-# LINE 132 "Network/Socket.hsc" #-}

    -- * Special constants
    , aNY_PORT
    , iNADDR_ANY

{-# LINE 137 "Network/Socket.hsc" #-}
    , iN6ADDR_ANY

{-# LINE 139 "Network/Socket.hsc" #-}
    , sOMAXCONN
    , sOL_SOCKET

{-# LINE 142 "Network/Socket.hsc" #-}
    , sCM_RIGHTS

{-# LINE 144 "Network/Socket.hsc" #-}
    , maxListenQueue

    -- * Initialisation
    , withSocketsDo
    
    -- * Very low level operations
    -- in case you ever want to get at the underlying file descriptor..
    , fdSocket
    , mkSocket

    -- * Internal

    -- | The following are exported ONLY for use in the BSD module and
    -- should not be used anywhere else.

    , packFamily
    , unpackFamily
    , packSocketType
    , throwSocketErrorIfMinus1_
    ) where


{-# LINE 177 "Network/Socket.hsc" #-}

import Data.Bits
import Data.List (foldl')
import Data.Word (Word16, Word32)
import Foreign.Ptr (Ptr, castPtr, nullPtr)
import Foreign.Storable (Storable(..))
import Foreign.C.Error
import Foreign.C.String (CString, withCString, peekCString, peekCStringLen)
import Foreign.C.Types (CUInt, CChar)

{-# LINE 187 "Network/Socket.hsc" #-}
import Foreign.C.Types (CInt(..), CSize(..))

{-# LINE 191 "Network/Socket.hsc" #-}
import Foreign.Marshal.Alloc ( alloca, allocaBytes )
import Foreign.Marshal.Array ( peekArray )
import Foreign.Marshal.Utils ( maybeWith, with )

import System.IO
import Control.Monad (liftM, when)
import Data.Ratio ((%))

import qualified Control.Exception
import Control.Concurrent.MVar
import Data.Typeable
import System.IO.Error


{-# LINE 205 "Network/Socket.hsc" #-}
import GHC.Conc (threadWaitRead, threadWaitWrite)
#if MIN_VERSION_base(4,3,1)
import GHC.Conc (closeFdWith)
#endif

{-# LINE 213 "Network/Socket.hsc" #-}

{-# LINE 214 "Network/Socket.hsc" #-}
import qualified GHC.IO.Device
import GHC.IO.Handle.FD
import GHC.IO.Exception
import GHC.IO

{-# LINE 222 "Network/Socket.hsc" #-}
import qualified System.Posix.Internals

{-# LINE 226 "Network/Socket.hsc" #-}


{-# LINE 228 "Network/Socket.hsc" #-}
import GHC.IO.FD

{-# LINE 230 "Network/Socket.hsc" #-}

import Network.Socket.Internal

-- | Either a host name e.g., @\"haskell.org\"@ or a numeric host
-- address string consisting of a dotted decimal IPv4 address or an
-- IPv6 address e.g., @\"192.168.0.1\"@.
type HostName       = String
type ServiceName    = String

-- ----------------------------------------------------------------------------
-- On Windows, our sockets are not put in non-blocking mode (non-blocking
-- is not supported for regular file descriptors on Windows, and it would
-- be a pain to support it only for sockets).  So there are two cases:
--
--  - the threaded RTS uses safe calls for socket operations to get
--    non-blocking I/O, just like the rest of the I/O library
--
--  - with the non-threaded RTS, only some operations on sockets will be
--    non-blocking.  Reads and writes go through the normal async I/O
--    system.  accept() uses asyncDoProc so is non-blocking.  A handful
--    of others (recvFrom, sendFd, recvFd) will block all threads - if this
--    is a problem, -threaded is the workaround.
--
#if defined(mingw32_HOST_OS)
#define SAFE_ON_WIN safe
#else
#define SAFE_ON_WIN unsafe
#endif

-----------------------------------------------------------------------------
-- Socket types

-- There are a few possible ways to do this.  The first is convert the
-- structs used in the C library into an equivalent Haskell type. An
-- other possible implementation is to keep all the internals in the C
-- code and use an Int## and a status flag. The second method is used
-- here since a lot of the C structures are not required to be
-- manipulated.

-- Originally the status was non-mutable so we had to return a new
-- socket each time we changed the status.  This version now uses
-- mutable variables to avoid the need to do this.  The result is a
-- cleaner interface and better security since the application
-- programmer now can't circumvent the status information to perform
-- invalid operations on sockets.

data SocketStatus
  -- Returned Status    Function called
  = NotConnected        -- socket
  | Bound               -- bindSocket
  | Listening           -- listen
  | Connected           -- connect/accept
  | ConvertedToHandle   -- is now a Handle, don't touch
  | Closed              -- sClose 
    deriving (Eq, Show, Typeable)

data Socket
  = MkSocket
            CInt                 -- File Descriptor
            Family                                
            SocketType                            
            ProtocolNumber       -- Protocol Number
            (MVar SocketStatus)  -- Status Flag
  deriving Typeable


{-# LINE 300 "Network/Socket.hsc" #-}

mkSocket :: CInt
         -> Family
         -> SocketType
         -> ProtocolNumber
         -> SocketStatus
         -> IO Socket
mkSocket fd fam sType pNum stat = do
   mStat <- newMVar stat
   return (MkSocket fd fam sType pNum mStat)

instance Eq Socket where
  (MkSocket _ _ _ _ m1) == (MkSocket _ _ _ _ m2) = m1 == m2

instance Show Socket where
  showsPrec _n (MkSocket fd _ _ _ _) =
        showString "<socket: " . shows fd . showString ">"


fdSocket :: Socket -> CInt
fdSocket (MkSocket fd _ _ _ _) = fd

type ProtocolNumber = CInt

-- | This is the default protocol for a given service.
defaultProtocol :: ProtocolNumber
defaultProtocol = 0

----------------------------------------------------------------------------
-- Port Numbers

instance Show PortNumber where
  showsPrec p pn = showsPrec p (portNumberToInt pn)

intToPortNumber :: Int -> PortNumber
intToPortNumber v = PortNum (htons (fromIntegral v))

portNumberToInt :: PortNumber -> Int
portNumberToInt (PortNum po) = fromIntegral (ntohs po)

foreign import CALLCONV unsafe "ntohs" ntohs :: Word16 -> Word16
foreign import CALLCONV unsafe "htons" htons :: Word16 -> Word16
--foreign import CALLCONV unsafe "ntohl" ntohl :: Word32 -> Word32
foreign import CALLCONV unsafe "htonl" htonl :: Word32 -> Word32

instance Enum PortNumber where
    toEnum   = intToPortNumber
    fromEnum = portNumberToInt

instance Num PortNumber where
   fromInteger i = intToPortNumber (fromInteger i)
    -- for completeness.
   (+) x y   = intToPortNumber (portNumberToInt x + portNumberToInt y)
   (-) x y   = intToPortNumber (portNumberToInt x - portNumberToInt y)
   negate x  = intToPortNumber (-portNumberToInt x)
   (*) x y   = intToPortNumber (portNumberToInt x * portNumberToInt y)
   abs n     = intToPortNumber (abs (portNumberToInt n))
   signum n  = intToPortNumber (signum (portNumberToInt n))

instance Real PortNumber where
    toRational x = toInteger x % 1

instance Integral PortNumber where
    quotRem a b = let (c,d) = quotRem (portNumberToInt a) (portNumberToInt b) in
                  (intToPortNumber c, intToPortNumber d)
    toInteger a = toInteger (portNumberToInt a)

instance Storable PortNumber where
   sizeOf    _ = sizeOf    (undefined :: Word16)
   alignment _ = alignment (undefined :: Word16)
   poke p (PortNum po) = poke (castPtr p) po
   peek p = PortNum `liftM` peek (castPtr p)

-----------------------------------------------------------------------------
-- SockAddr

instance Show SockAddr where

{-# LINE 378 "Network/Socket.hsc" #-}
  showsPrec _ (SockAddrUnix str) = showString str

{-# LINE 380 "Network/Socket.hsc" #-}
  showsPrec _ (SockAddrInet port ha)
   = showString (unsafePerformIO (inet_ntoa ha)) 
   . showString ":"
   . shows port

{-# LINE 385 "Network/Socket.hsc" #-}
  showsPrec _ addr@(SockAddrInet6 port _ _ _)
   = showChar '['
   . showString (unsafePerformIO $
                 fst `liftM` getNameInfo [NI_NUMERICHOST] True False addr >>=
                 maybe (fail "showsPrec: impossible internal error") return)
   . showString "]:"
   . shows port

{-# LINE 393 "Network/Socket.hsc" #-}

-----------------------------------------------------------------------------
-- Connection Functions

-- In the following connection and binding primitives.  The names of
-- the equivalent C functions have been preserved where possible. It
-- should be noted that some of these names used in the C library,
-- \tr{bind} in particular, have a different meaning to many Haskell
-- programmers and have thus been renamed by appending the prefix
-- Socket.

-- | Create a new socket using the given address family, socket type
-- and protocol number.  The address family is usually 'AF_INET',
-- 'AF_INET6', or 'AF_UNIX'.  The socket type is usually 'Stream' or
-- 'Datagram'.  The protocol number is usually 'defaultProtocol'.
-- If 'AF_INET6' is used, the 'IPv6Only' socket option is set to 0
-- so that both IPv4 and IPv6 can be handled with one socket.
socket :: Family         -- Family Name (usually AF_INET)
       -> SocketType     -- Socket Type (usually Stream)
       -> ProtocolNumber -- Protocol Number (getProtocolByName to find value)
       -> IO Socket      -- Unconnected Socket
socket family stype protocol = do
    fd <- throwSocketErrorIfMinus1Retry "socket" $
                c_socket (packFamily family) (packSocketType stype) protocol

{-# LINE 418 "Network/Socket.hsc" #-}

{-# LINE 421 "Network/Socket.hsc" #-}
    System.Posix.Internals.setNonBlockingFD fd True

{-# LINE 423 "Network/Socket.hsc" #-}

{-# LINE 424 "Network/Socket.hsc" #-}
    socket_status <- newMVar NotConnected
    let sock = MkSocket fd family stype protocol socket_status

{-# LINE 427 "Network/Socket.hsc" #-}

{-# LINE 433 "Network/Socket.hsc" #-}
    when (family == AF_INET6) $ setSocketOption sock IPv6Only 0

{-# LINE 435 "Network/Socket.hsc" #-}

{-# LINE 436 "Network/Socket.hsc" #-}
    return sock

-- | Build a pair of connected socket objects using the given address
-- family, socket type, and protocol number.  Address family, socket
-- type, and protocol number are as for the 'socket' function above.
-- Availability: Unix.

{-# LINE 443 "Network/Socket.hsc" #-}
socketPair :: Family              -- Family Name (usually AF_INET or AF_INET6)
           -> SocketType          -- Socket Type (usually Stream)
           -> ProtocolNumber      -- Protocol Number
           -> IO (Socket, Socket) -- unnamed and connected.
socketPair family stype protocol = do
    allocaBytes (2 * sizeOf (1 :: CInt)) $ \ fdArr -> do
    _rc <- throwSocketErrorIfMinus1Retry "socketpair" $
                c_socketpair (packFamily family)
                             (packSocketType stype)
                             protocol fdArr
    [fd1,fd2] <- peekArray 2 fdArr 
    s1 <- mkNonBlockingSocket fd1
    s2 <- mkNonBlockingSocket fd2
    return (s1,s2)
  where
    mkNonBlockingSocket fd = do

{-# LINE 460 "Network/Socket.hsc" #-}

{-# LINE 463 "Network/Socket.hsc" #-}
       System.Posix.Internals.setNonBlockingFD fd True

{-# LINE 465 "Network/Socket.hsc" #-}

{-# LINE 466 "Network/Socket.hsc" #-}
       stat <- newMVar Connected
       return (MkSocket fd family stype protocol stat)

foreign import ccall unsafe "socketpair"
  c_socketpair :: CInt -> CInt -> CInt -> Ptr CInt -> IO CInt

{-# LINE 472 "Network/Socket.hsc" #-}

-----------------------------------------------------------------------------
-- Binding a socket

-- | Bind the socket to an address. The socket must not already be
-- bound.  The 'Family' passed to @bindSocket@ must be the
-- same as that passed to 'socket'.  If the special port number
-- 'aNY_PORT' is passed then the system assigns the next available
-- use port.
bindSocket :: Socket    -- Unconnected Socket
           -> SockAddr  -- Address to Bind to
           -> IO ()
bindSocket (MkSocket s _family _stype _protocol socketStatus) addr = do
 modifyMVar_ socketStatus $ \ status -> do
 if status /= NotConnected 
  then
   ioError (userError ("bindSocket: can't peform bind on socket in status " ++
         show status))
  else do
   withSockAddr addr $ \p_addr sz -> do
   _status <- throwSocketErrorIfMinus1Retry "bind" $ c_bind s p_addr (fromIntegral sz)
   return Bound

-----------------------------------------------------------------------------
-- Connecting a socket

-- | Connect to a remote socket at address.
connect :: Socket    -- Unconnected Socket
        -> SockAddr  -- Socket address stuff
        -> IO ()
connect sock@(MkSocket s _family _stype _protocol socketStatus) addr = do
 modifyMVar_ socketStatus $ \currentStatus -> do
 if currentStatus /= NotConnected && currentStatus /= Bound
  then
    ioError (userError ("connect: can't peform connect on socket in status " ++
        show currentStatus))
  else do
    withSockAddr addr $ \p_addr sz -> do

    let connectLoop = do
           r <- c_connect s p_addr (fromIntegral sz)
           if r == -1
               then do 

{-# LINE 516 "Network/Socket.hsc" #-}
                   err <- getErrno
                   case () of
                     _ | err == eINTR       -> connectLoop
                     _ | err == eINPROGRESS -> connectBlocked
--                   _ | err == eAGAIN      -> connectBlocked
                     _otherwise             -> throwSocketError "connect"

{-# LINE 533 "Network/Socket.hsc" #-}
               else return r

        connectBlocked = do 

{-# LINE 537 "Network/Socket.hsc" #-}
           threadWaitWrite (fromIntegral s)

{-# LINE 539 "Network/Socket.hsc" #-}
           err <- getSocketOption sock SoError
           if (err == 0)
                then return 0
                else do ioError (errnoToIOError "connect" 
                                (Errno (fromIntegral err))
                                Nothing Nothing)

    connectLoop
    return Connected

-----------------------------------------------------------------------------
-- Listen

-- | Listen for connections made to the socket.  The second argument
-- specifies the maximum number of queued connections and should be at
-- least 1; the maximum value is system-dependent (usually 5).
listen :: Socket  -- Connected & Bound Socket
       -> Int     -- Queue Length
       -> IO ()
listen (MkSocket s _family _stype _protocol socketStatus) backlog = do
 modifyMVar_ socketStatus $ \ status -> do
 if status /= Bound 
   then
     ioError (userError ("listen: can't peform listen on socket in status " ++
         show status))
   else do
     throwSocketErrorIfMinus1Retry "listen" (c_listen s (fromIntegral backlog))
     return Listening

-----------------------------------------------------------------------------
-- Accept
--
-- A call to `accept' only returns when data is available on the given
-- socket, unless the socket has been set to non-blocking.  It will
-- return a new socket which should be used to read the incoming data and
-- should then be closed. Using the socket returned by `accept' allows
-- incoming requests to be queued on the original socket.

-- | Accept a connection.  The socket must be bound to an address and
-- listening for connections.  The return value is a pair @(conn,
-- address)@ where @conn@ is a new socket object usable to send and
-- receive data on the connection, and @address@ is the address bound
-- to the socket on the other end of the connection.
accept :: Socket                        -- Queue Socket
       -> IO (Socket,                   -- Readable Socket
              SockAddr)                 -- Peer details

accept sock@(MkSocket s family stype protocol status) = do
 currentStatus <- readMVar status
 okay <- sIsAcceptable sock
 if not okay
   then
     ioError (userError ("accept: can't perform accept on socket (" ++ (show (family,stype,protocol)) ++") in status " ++
         show currentStatus))
   else do
     let sz = sizeOfSockAddrByFamily family
     allocaBytes sz $ \ sockaddr -> do

{-# LINE 611 "Network/Socket.hsc" #-}
     with (fromIntegral sz) $ \ ptr_len -> do
     new_sock <- 

{-# LINE 614 "Network/Socket.hsc" #-}
                 throwSocketErrorIfMinus1RetryMayBlock "accept"
                        (threadWaitRead (fromIntegral s))

{-# LINE 617 "Network/Socket.hsc" #-}
                        (c_accept s sockaddr ptr_len)

{-# LINE 619 "Network/Socket.hsc" #-}

{-# LINE 622 "Network/Socket.hsc" #-}
     System.Posix.Internals.setNonBlockingFD new_sock True

{-# LINE 624 "Network/Socket.hsc" #-}

{-# LINE 625 "Network/Socket.hsc" #-}

{-# LINE 626 "Network/Socket.hsc" #-}
     addr <- peekSockAddr sockaddr
     new_status <- newMVar Connected
     return ((MkSocket new_sock family stype protocol new_status), addr)


{-# LINE 640 "Network/Socket.hsc" #-}

-----------------------------------------------------------------------------
-- ** Sending and reciving data

-- $sendrecv
--
-- Do not use the @send@ and @recv@ functions defined in this module
-- in new code, as they incorrectly represent binary data as a Unicode
-- string.  As a result, these functions are inefficient and may lead
-- to bugs in the program.  Instead use the @send@ and @recv@
-- functions defined in the 'Network.Socket.ByteString' module.

-----------------------------------------------------------------------------
-- sendTo & recvFrom

-- | Send data to the socket.  The recipient can be specified
-- explicitly, so the socket need not be in a connected state.
-- Returns the number of bytes sent.  Applications are responsible for
-- ensuring that all data has been sent.
--
-- NOTE: blocking on Windows unless you compile with -threaded (see
-- GHC ticket #1129)
sendTo :: Socket        -- (possibly) bound/connected Socket
       -> String        -- Data to send
       -> SockAddr
       -> IO Int        -- Number of Bytes sent
sendTo sock xs addr = do
 withCString xs $ \str -> do
   sendBufTo sock str (length xs) addr

-- | Send data to the socket.  The recipient can be specified
-- explicitly, so the socket need not be in a connected state.
-- Returns the number of bytes sent.  Applications are responsible for
-- ensuring that all data has been sent.
sendBufTo :: Socket            -- (possibly) bound/connected Socket
          -> Ptr a -> Int  -- Data to send
          -> SockAddr
          -> IO Int            -- Number of Bytes sent
sendBufTo (MkSocket s _family _stype _protocol _status) ptr nbytes addr = do
 withSockAddr addr $ \p_addr sz -> do
   liftM fromIntegral $

{-# LINE 682 "Network/Socket.hsc" #-}
     throwSocketErrorIfMinus1RetryMayBlock "sendTo"
        (threadWaitWrite (fromIntegral s)) $

{-# LINE 685 "Network/Socket.hsc" #-}
        c_sendto s ptr (fromIntegral $ nbytes) 0{-flags-} 
                        p_addr (fromIntegral sz)

-- | Receive data from the socket. The socket need not be in a
-- connected state. Returns @(bytes, nbytes, address)@ where @bytes@
-- is a @String@ of length @nbytes@ representing the data received and
-- @address@ is a 'SockAddr' representing the address of the sending
-- socket.
--
-- NOTE: blocking on Windows unless you compile with -threaded (see
-- GHC ticket #1129)
recvFrom :: Socket -> Int -> IO (String, Int, SockAddr)
recvFrom sock nbytes =
  allocaBytes nbytes $ \ptr -> do
    (len, sockaddr) <- recvBufFrom sock ptr nbytes
    str <- peekCStringLen (ptr, len)
    return (str, len, sockaddr)

-- | Receive data from the socket, writing it into buffer instead of
-- creating a new string.  The socket need not be in a connected
-- state. Returns @(nbytes, address)@ where @nbytes@ is the number of
-- bytes received and @address@ is a 'SockAddr' representing the
-- address of the sending socket.
--
-- NOTE: blocking on Windows unless you compile with -threaded (see
-- GHC ticket #1129)
recvBufFrom :: Socket -> Ptr a -> Int -> IO (Int, SockAddr)
recvBufFrom sock@(MkSocket s family _stype _protocol _status) ptr nbytes
 | nbytes <= 0 = ioError (mkInvalidRecvArgError "Network.Socket.recvFrom")
 | otherwise   = 
    withNewSockAddr family $ \ptr_addr sz -> do
      alloca $ \ptr_len -> do
        poke ptr_len (fromIntegral sz)
        len <- 

{-# LINE 720 "Network/Socket.hsc" #-}
               throwSocketErrorIfMinus1RetryMayBlock "recvFrom"
                   (threadWaitRead (fromIntegral s)) $

{-# LINE 723 "Network/Socket.hsc" #-}
                   c_recvfrom s ptr (fromIntegral nbytes) 0{-flags-} 
                                ptr_addr ptr_len
        let len' = fromIntegral len
        if len' == 0
         then ioError (mkEOFError "Network.Socket.recvFrom")
         else do
           flg <- sIsConnected sock
             -- For at least one implementation (WinSock 2), recvfrom() ignores
             -- filling in the sockaddr for connected TCP sockets. Cope with 
             -- this by using getPeerName instead.
           sockaddr <- 
                if flg then
                   getPeerName sock
                else
                   peekSockAddr ptr_addr 
           return (len', sockaddr)

-----------------------------------------------------------------------------
-- send & recv

-- | Send data to the socket. The socket must be connected to a remote
-- socket. Returns the number of bytes sent.  Applications are
-- responsible for ensuring that all data has been sent.
send :: Socket  -- Bound/Connected Socket
     -> String  -- Data to send
     -> IO Int  -- Number of Bytes sent
send sock@(MkSocket s _family _stype _protocol _status) xs = do
 let len = length xs
 withCString xs $ \str -> do
   liftM fromIntegral $

{-# LINE 772 "Network/Socket.hsc" #-}

{-# LINE 773 "Network/Socket.hsc" #-}
     throwSocketErrorIfMinus1RetryMayBlock "send"
        (threadWaitWrite (fromIntegral s)) $

{-# LINE 776 "Network/Socket.hsc" #-}
        c_send s str (fromIntegral len) 0{-flags-} 

{-# LINE 778 "Network/Socket.hsc" #-}

-- | Receive data from the socket.  The socket must be in a connected
-- state. This function may return fewer bytes than specified.  If the
-- message is longer than the specified length, it may be discarded
-- depending on the type of socket.  This function may block until a
-- message arrives.
--
-- Considering hardware and network realities, the maximum number of
-- bytes to receive should be a small power of 2, e.g., 4096.
--
-- For TCP sockets, a zero length return value means the peer has
-- closed its half side of the connection.
recv :: Socket -> Int -> IO String
recv sock l = recvLen sock l >>= \ (s,_) -> return s

recvLen :: Socket -> Int -> IO (String, Int)
recvLen sock@(MkSocket s _family _stype _protocol _status) nbytes
 | nbytes <= 0 = ioError (mkInvalidRecvArgError "Network.Socket.recv")
 | otherwise   = do
     allocaBytes nbytes $ \ptr -> do
        len <- 

{-# LINE 808 "Network/Socket.hsc" #-}

{-# LINE 809 "Network/Socket.hsc" #-}
               throwSocketErrorIfMinus1RetryMayBlock "recv"
                   (threadWaitRead (fromIntegral s)) $

{-# LINE 812 "Network/Socket.hsc" #-}
                   c_recv s ptr (fromIntegral nbytes) 0{-flags-} 

{-# LINE 814 "Network/Socket.hsc" #-}
        let len' = fromIntegral len
        if len' == 0
         then ioError (mkEOFError "Network.Socket.recv")
         else do
           s' <- peekCStringLen (castPtr ptr,len')
           return (s', len')

-- ---------------------------------------------------------------------------
-- socketPort
--
-- The port number the given socket is currently connected to can be
-- determined by calling $port$, is generally only useful when bind
-- was given $aNY\_PORT$.

socketPort :: Socket            -- Connected & Bound Socket
           -> IO PortNumber     -- Port Number of Socket
socketPort sock@(MkSocket _ AF_INET _ _ _) = do
    (SockAddrInet port _) <- getSocketName sock
    return port

{-# LINE 834 "Network/Socket.hsc" #-}
socketPort sock@(MkSocket _ AF_INET6 _ _ _) = do
    (SockAddrInet6 port _ _ _) <- getSocketName sock
    return port

{-# LINE 838 "Network/Socket.hsc" #-}
socketPort (MkSocket _ family _ _ _) =
    ioError (userError ("socketPort: not supported for Family " ++ show family))


-- ---------------------------------------------------------------------------
-- getPeerName

-- Calling $getPeerName$ returns the address details of the machine,
-- other than the local one, which is connected to the socket. This is
-- used in programs such as FTP to determine where to send the
-- returning data.  The corresponding call to get the details of the
-- local machine is $getSocketName$.

getPeerName   :: Socket -> IO SockAddr
getPeerName (MkSocket s family _ _ _) = do
 withNewSockAddr family $ \ptr sz -> do
   with (fromIntegral sz) $ \int_star -> do
   throwSocketErrorIfMinus1Retry "getPeerName" $ c_getpeername s ptr int_star
   _sz <- peek int_star
   peekSockAddr ptr
    
getSocketName :: Socket -> IO SockAddr
getSocketName (MkSocket s family _ _ _) = do
 withNewSockAddr family $ \ptr sz -> do
   with (fromIntegral sz) $ \int_star -> do
   throwSocketErrorIfMinus1Retry "getSocketName" $ c_getsockname s ptr int_star
   peekSockAddr ptr

-----------------------------------------------------------------------------
-- Socket Properties

data SocketOption
    = DummySocketOption__

{-# LINE 872 "Network/Socket.hsc" #-}
    | Debug         {- SO_DEBUG     -}

{-# LINE 874 "Network/Socket.hsc" #-}

{-# LINE 875 "Network/Socket.hsc" #-}
    | ReuseAddr     {- SO_REUSEADDR -}

{-# LINE 877 "Network/Socket.hsc" #-}

{-# LINE 878 "Network/Socket.hsc" #-}
    | Type          {- SO_TYPE      -}

{-# LINE 880 "Network/Socket.hsc" #-}

{-# LINE 881 "Network/Socket.hsc" #-}
    | SoError       {- SO_ERROR     -}

{-# LINE 883 "Network/Socket.hsc" #-}

{-# LINE 884 "Network/Socket.hsc" #-}
    | DontRoute     {- SO_DONTROUTE -}

{-# LINE 886 "Network/Socket.hsc" #-}

{-# LINE 887 "Network/Socket.hsc" #-}
    | Broadcast     {- SO_BROADCAST -}

{-# LINE 889 "Network/Socket.hsc" #-}

{-# LINE 890 "Network/Socket.hsc" #-}
    | SendBuffer    {- SO_SNDBUF    -}

{-# LINE 892 "Network/Socket.hsc" #-}

{-# LINE 893 "Network/Socket.hsc" #-}
    | RecvBuffer    {- SO_RCVBUF    -}

{-# LINE 895 "Network/Socket.hsc" #-}

{-# LINE 896 "Network/Socket.hsc" #-}
    | KeepAlive     {- SO_KEEPALIVE -}

{-# LINE 898 "Network/Socket.hsc" #-}

{-# LINE 899 "Network/Socket.hsc" #-}
    | OOBInline     {- SO_OOBINLINE -}

{-# LINE 901 "Network/Socket.hsc" #-}

{-# LINE 902 "Network/Socket.hsc" #-}
    | TimeToLive    {- IP_TTL       -}

{-# LINE 904 "Network/Socket.hsc" #-}

{-# LINE 905 "Network/Socket.hsc" #-}
    | MaxSegment    {- TCP_MAXSEG   -}

{-# LINE 907 "Network/Socket.hsc" #-}

{-# LINE 908 "Network/Socket.hsc" #-}
    | NoDelay       {- TCP_NODELAY  -}

{-# LINE 910 "Network/Socket.hsc" #-}

{-# LINE 911 "Network/Socket.hsc" #-}
    | Linger        {- SO_LINGER    -}

{-# LINE 913 "Network/Socket.hsc" #-}

{-# LINE 916 "Network/Socket.hsc" #-}

{-# LINE 917 "Network/Socket.hsc" #-}
    | RecvLowWater  {- SO_RCVLOWAT  -}

{-# LINE 919 "Network/Socket.hsc" #-}

{-# LINE 920 "Network/Socket.hsc" #-}
    | SendLowWater  {- SO_SNDLOWAT  -}

{-# LINE 922 "Network/Socket.hsc" #-}

{-# LINE 923 "Network/Socket.hsc" #-}
    | RecvTimeOut   {- SO_RCVTIMEO  -}

{-# LINE 925 "Network/Socket.hsc" #-}

{-# LINE 926 "Network/Socket.hsc" #-}
    | SendTimeOut   {- SO_SNDTIMEO  -}

{-# LINE 928 "Network/Socket.hsc" #-}

{-# LINE 931 "Network/Socket.hsc" #-}

{-# LINE 932 "Network/Socket.hsc" #-}
    | IPv6Only      {- IPV6_V6ONLY -}

{-# LINE 934 "Network/Socket.hsc" #-}
    deriving (Show, Typeable)

socketOptLevel :: SocketOption -> CInt
socketOptLevel so = 
  case so of

{-# LINE 940 "Network/Socket.hsc" #-}
    TimeToLive   -> 0
{-# LINE 941 "Network/Socket.hsc" #-}

{-# LINE 942 "Network/Socket.hsc" #-}

{-# LINE 943 "Network/Socket.hsc" #-}
    MaxSegment   -> 6
{-# LINE 944 "Network/Socket.hsc" #-}

{-# LINE 945 "Network/Socket.hsc" #-}

{-# LINE 946 "Network/Socket.hsc" #-}
    NoDelay      -> 6
{-# LINE 947 "Network/Socket.hsc" #-}

{-# LINE 948 "Network/Socket.hsc" #-}

{-# LINE 949 "Network/Socket.hsc" #-}
    IPv6Only     -> 41
{-# LINE 950 "Network/Socket.hsc" #-}

{-# LINE 951 "Network/Socket.hsc" #-}
    _            -> 1
{-# LINE 952 "Network/Socket.hsc" #-}

packSocketOption :: SocketOption -> CInt
packSocketOption so =
  case so of

{-# LINE 957 "Network/Socket.hsc" #-}
    Debug         -> 1
{-# LINE 958 "Network/Socket.hsc" #-}

{-# LINE 959 "Network/Socket.hsc" #-}

{-# LINE 960 "Network/Socket.hsc" #-}
    ReuseAddr     -> 2
{-# LINE 961 "Network/Socket.hsc" #-}

{-# LINE 962 "Network/Socket.hsc" #-}

{-# LINE 963 "Network/Socket.hsc" #-}
    Type          -> 3
{-# LINE 964 "Network/Socket.hsc" #-}

{-# LINE 965 "Network/Socket.hsc" #-}

{-# LINE 966 "Network/Socket.hsc" #-}
    SoError       -> 4
{-# LINE 967 "Network/Socket.hsc" #-}

{-# LINE 968 "Network/Socket.hsc" #-}

{-# LINE 969 "Network/Socket.hsc" #-}
    DontRoute     -> 5
{-# LINE 970 "Network/Socket.hsc" #-}

{-# LINE 971 "Network/Socket.hsc" #-}

{-# LINE 972 "Network/Socket.hsc" #-}
    Broadcast     -> 6
{-# LINE 973 "Network/Socket.hsc" #-}

{-# LINE 974 "Network/Socket.hsc" #-}

{-# LINE 975 "Network/Socket.hsc" #-}
    SendBuffer    -> 7
{-# LINE 976 "Network/Socket.hsc" #-}

{-# LINE 977 "Network/Socket.hsc" #-}

{-# LINE 978 "Network/Socket.hsc" #-}
    RecvBuffer    -> 8
{-# LINE 979 "Network/Socket.hsc" #-}

{-# LINE 980 "Network/Socket.hsc" #-}

{-# LINE 981 "Network/Socket.hsc" #-}
    KeepAlive     -> 9
{-# LINE 982 "Network/Socket.hsc" #-}

{-# LINE 983 "Network/Socket.hsc" #-}

{-# LINE 984 "Network/Socket.hsc" #-}
    OOBInline     -> 10
{-# LINE 985 "Network/Socket.hsc" #-}

{-# LINE 986 "Network/Socket.hsc" #-}

{-# LINE 987 "Network/Socket.hsc" #-}
    TimeToLive    -> 2
{-# LINE 988 "Network/Socket.hsc" #-}

{-# LINE 989 "Network/Socket.hsc" #-}

{-# LINE 990 "Network/Socket.hsc" #-}
    MaxSegment    -> 2
{-# LINE 991 "Network/Socket.hsc" #-}

{-# LINE 992 "Network/Socket.hsc" #-}

{-# LINE 993 "Network/Socket.hsc" #-}
    NoDelay       -> 1
{-# LINE 994 "Network/Socket.hsc" #-}

{-# LINE 995 "Network/Socket.hsc" #-}

{-# LINE 996 "Network/Socket.hsc" #-}
    Linger        -> 13
{-# LINE 997 "Network/Socket.hsc" #-}

{-# LINE 998 "Network/Socket.hsc" #-}

{-# LINE 1001 "Network/Socket.hsc" #-}

{-# LINE 1002 "Network/Socket.hsc" #-}
    RecvLowWater  -> 18
{-# LINE 1003 "Network/Socket.hsc" #-}

{-# LINE 1004 "Network/Socket.hsc" #-}

{-# LINE 1005 "Network/Socket.hsc" #-}
    SendLowWater  -> 19
{-# LINE 1006 "Network/Socket.hsc" #-}

{-# LINE 1007 "Network/Socket.hsc" #-}

{-# LINE 1008 "Network/Socket.hsc" #-}
    RecvTimeOut   -> 20
{-# LINE 1009 "Network/Socket.hsc" #-}

{-# LINE 1010 "Network/Socket.hsc" #-}

{-# LINE 1011 "Network/Socket.hsc" #-}
    SendTimeOut   -> 21
{-# LINE 1012 "Network/Socket.hsc" #-}

{-# LINE 1013 "Network/Socket.hsc" #-}

{-# LINE 1016 "Network/Socket.hsc" #-}

{-# LINE 1017 "Network/Socket.hsc" #-}
    IPv6Only      -> 26
{-# LINE 1018 "Network/Socket.hsc" #-}

{-# LINE 1019 "Network/Socket.hsc" #-}
    unknown       -> error ("Network.Socket.packSocketOption: unknown option " ++
                            show unknown)

setSocketOption :: Socket 
                -> SocketOption -- Option Name
                -> Int          -- Option Value
                -> IO ()
setSocketOption (MkSocket s _ _ _ _) so v = do
   with (fromIntegral v) $ \ptr_v -> do
   throwErrnoIfMinus1_ "setSocketOption" $
       c_setsockopt s (socketOptLevel so) (packSocketOption so) ptr_v 
          (fromIntegral (sizeOf (undefined :: CInt)))
   return ()


getSocketOption :: Socket
                -> SocketOption  -- Option Name
                -> IO Int        -- Option Value
getSocketOption (MkSocket s _ _ _ _) so = do
   alloca $ \ptr_v ->
     with (fromIntegral (sizeOf (undefined :: CInt))) $ \ptr_sz -> do
       throwErrnoIfMinus1 "getSocketOption" $
         c_getsockopt s (socketOptLevel so) (packSocketOption so) ptr_v ptr_sz
       fromIntegral `liftM` peek ptr_v



{-# LINE 1046 "Network/Socket.hsc" #-}
-- | Returns the processID, userID and groupID of the socket's peer.
--
-- Only available on platforms that support SO_PEERCRED on domain sockets.
getPeerCred :: Socket -> IO (CUInt, CUInt, CUInt)
getPeerCred sock = do
  let fd = fdSocket sock
  let sz = (fromIntegral (12))
{-# LINE 1053 "Network/Socket.hsc" #-}
  with sz $ \ ptr_cr -> 
   alloca       $ \ ptr_sz -> do
     poke ptr_sz sz
     throwErrnoIfMinus1 "getPeerCred" $
       c_getsockopt fd (1) (17) ptr_cr ptr_sz
{-# LINE 1058 "Network/Socket.hsc" #-}
     pid <- ((\hsc_ptr -> peekByteOff hsc_ptr 0)) ptr_cr
{-# LINE 1059 "Network/Socket.hsc" #-}
     uid <- ((\hsc_ptr -> peekByteOff hsc_ptr 4)) ptr_cr
{-# LINE 1060 "Network/Socket.hsc" #-}
     gid <- ((\hsc_ptr -> peekByteOff hsc_ptr 8)) ptr_cr
{-# LINE 1061 "Network/Socket.hsc" #-}
     return (pid, uid, gid)

{-# LINE 1063 "Network/Socket.hsc" #-}

#if !(MIN_VERSION_base(4,3,1))
closeFdWith closer fd = closer fd
#endif


{-# LINE 1069 "Network/Socket.hsc" #-}
-- sending/receiving ancillary socket data; low-level mechanism
-- for transmitting file descriptors, mainly.
sendFd :: Socket -> CInt -> IO ()
sendFd sock outfd = do
  let fd = fdSocket sock

{-# LINE 1075 "Network/Socket.hsc" #-}
  throwSocketErrorIfMinus1RetryMayBlock "sendFd"
     (threadWaitWrite (fromIntegral fd)) $
     c_sendFd fd outfd

{-# LINE 1081 "Network/Socket.hsc" #-}
   -- Note: If Winsock supported FD-passing, thi would have been 
   -- incorrect (since socket FDs need to be closed via closesocket().)
  close outfd
  
recvFd :: Socket -> IO CInt
recvFd sock = do
  let fd = fdSocket sock
  theFd <- 

{-# LINE 1090 "Network/Socket.hsc" #-}
    throwSocketErrorIfMinus1RetryMayBlock "recvFd" 
        (threadWaitRead (fromIntegral fd)) $

{-# LINE 1093 "Network/Socket.hsc" #-}
         c_recvFd fd
  return theFd


sendAncillary :: Socket
              -> Int
              -> Int
              -> Int
              -> Ptr a
              -> Int
              -> IO ()
sendAncillary sock level ty flags datum len = do
  let fd = fdSocket sock
  _ <-

{-# LINE 1108 "Network/Socket.hsc" #-}
   throwSocketErrorIfMinus1RetryMayBlock "sendAncillary"
     (threadWaitWrite (fromIntegral fd)) $

{-# LINE 1111 "Network/Socket.hsc" #-}
     c_sendAncillary fd (fromIntegral level) (fromIntegral ty)
                        (fromIntegral flags) datum (fromIntegral len)
  return ()

recvAncillary :: Socket
              -> Int
              -> Int
              -> IO (Int,Int,Ptr a,Int)
recvAncillary sock flags len = do
  let fd = fdSocket sock
  alloca      $ \ ptr_len   ->
   alloca      $ \ ptr_lev   ->
    alloca      $ \ ptr_ty    ->
     alloca      $ \ ptr_pData -> do
      poke ptr_len (fromIntegral len)
      _ <- 

{-# LINE 1128 "Network/Socket.hsc" #-}
        throwSocketErrorIfMinus1RetryMayBlock "recvAncillary" 
            (threadWaitRead (fromIntegral fd)) $

{-# LINE 1131 "Network/Socket.hsc" #-}
            c_recvAncillary fd ptr_lev ptr_ty (fromIntegral flags) ptr_pData ptr_len
      rcvlen <- fromIntegral `liftM` peek ptr_len
      lev <- fromIntegral `liftM` peek ptr_lev
      ty  <- fromIntegral `liftM` peek ptr_ty
      pD  <- peek ptr_pData
      return (lev,ty,pD, rcvlen)
foreign import ccall SAFE_ON_WIN "sendAncillary"
  c_sendAncillary :: CInt -> CInt -> CInt -> CInt -> Ptr a -> CInt -> IO CInt

foreign import ccall SAFE_ON_WIN "recvAncillary"
  c_recvAncillary :: CInt -> Ptr CInt -> Ptr CInt -> CInt -> Ptr (Ptr a) -> Ptr CInt -> IO CInt

foreign import ccall SAFE_ON_WIN "sendFd" c_sendFd :: CInt -> CInt -> IO CInt
foreign import ccall SAFE_ON_WIN "recvFd" c_recvFd :: CInt -> IO CInt


{-# LINE 1147 "Network/Socket.hsc" #-}


{-
A calling sequence table for the main functions is shown in the table below.

\begin{figure}[h]
\begin{center}
\begin{tabular}{|l|c|c|c|c|c|c|c|}d
\hline
{\bf A Call to} & socket & connect & bindSocket & listen & accept & read & write \\
\hline
{\bf Precedes} & & & & & & & \\
\hline 
socket &        &         &            &        &        &      & \\
\hline
connect & +     &         &            &        &        &      & \\
\hline
bindSocket & +  &         &            &        &        &      & \\
\hline
listen &        &         & +          &        &        &      & \\
\hline
accept &        &         &            &  +     &        &      & \\
\hline
read   &        &   +     &            &  +     &  +     &  +   & + \\
\hline
write  &        &   +     &            &  +     &  +     &  +   & + \\
\hline
\end{tabular}
\caption{Sequence Table for Major functions of Socket}
\label{tab:api-seq}
\end{center}
\end{figure}
-}

-- ---------------------------------------------------------------------------
-- OS Dependent Definitions
    
unpackFamily    :: CInt -> Family
packFamily      :: Family -> CInt

packSocketType  :: SocketType -> CInt
unpackSocketType:: CInt -> SocketType

------ ------
                        
packFamily f = case f of
        AF_UNSPEC -> 0
{-# LINE 1194 "Network/Socket.hsc" #-}

{-# LINE 1195 "Network/Socket.hsc" #-}
        AF_UNIX -> 1
{-# LINE 1196 "Network/Socket.hsc" #-}

{-# LINE 1197 "Network/Socket.hsc" #-}

{-# LINE 1198 "Network/Socket.hsc" #-}
        AF_INET -> 2
{-# LINE 1199 "Network/Socket.hsc" #-}

{-# LINE 1200 "Network/Socket.hsc" #-}

{-# LINE 1201 "Network/Socket.hsc" #-}
        AF_INET6 -> 10
{-# LINE 1202 "Network/Socket.hsc" #-}

{-# LINE 1203 "Network/Socket.hsc" #-}

{-# LINE 1206 "Network/Socket.hsc" #-}

{-# LINE 1209 "Network/Socket.hsc" #-}

{-# LINE 1212 "Network/Socket.hsc" #-}

{-# LINE 1215 "Network/Socket.hsc" #-}

{-# LINE 1218 "Network/Socket.hsc" #-}

{-# LINE 1221 "Network/Socket.hsc" #-}

{-# LINE 1224 "Network/Socket.hsc" #-}

{-# LINE 1227 "Network/Socket.hsc" #-}

{-# LINE 1228 "Network/Socket.hsc" #-}
        AF_SNA -> 22
{-# LINE 1229 "Network/Socket.hsc" #-}

{-# LINE 1230 "Network/Socket.hsc" #-}

{-# LINE 1231 "Network/Socket.hsc" #-}
        AF_DECnet -> 12
{-# LINE 1232 "Network/Socket.hsc" #-}

{-# LINE 1233 "Network/Socket.hsc" #-}

{-# LINE 1236 "Network/Socket.hsc" #-}

{-# LINE 1239 "Network/Socket.hsc" #-}

{-# LINE 1242 "Network/Socket.hsc" #-}

{-# LINE 1243 "Network/Socket.hsc" #-}
        AF_APPLETALK -> 5
{-# LINE 1244 "Network/Socket.hsc" #-}

{-# LINE 1245 "Network/Socket.hsc" #-}

{-# LINE 1246 "Network/Socket.hsc" #-}
        AF_ROUTE -> 16
{-# LINE 1247 "Network/Socket.hsc" #-}

{-# LINE 1248 "Network/Socket.hsc" #-}

{-# LINE 1251 "Network/Socket.hsc" #-}

{-# LINE 1254 "Network/Socket.hsc" #-}

{-# LINE 1257 "Network/Socket.hsc" #-}

{-# LINE 1260 "Network/Socket.hsc" #-}

{-# LINE 1263 "Network/Socket.hsc" #-}

{-# LINE 1266 "Network/Socket.hsc" #-}

{-# LINE 1267 "Network/Socket.hsc" #-}
        AF_X25 -> 9
{-# LINE 1268 "Network/Socket.hsc" #-}

{-# LINE 1269 "Network/Socket.hsc" #-}

{-# LINE 1270 "Network/Socket.hsc" #-}
        AF_AX25 -> 3
{-# LINE 1271 "Network/Socket.hsc" #-}

{-# LINE 1272 "Network/Socket.hsc" #-}

{-# LINE 1275 "Network/Socket.hsc" #-}

{-# LINE 1278 "Network/Socket.hsc" #-}

{-# LINE 1279 "Network/Socket.hsc" #-}
        AF_IPX -> 4
{-# LINE 1280 "Network/Socket.hsc" #-}

{-# LINE 1281 "Network/Socket.hsc" #-}

{-# LINE 1284 "Network/Socket.hsc" #-}

{-# LINE 1287 "Network/Socket.hsc" #-}

{-# LINE 1290 "Network/Socket.hsc" #-}

{-# LINE 1293 "Network/Socket.hsc" #-}

{-# LINE 1296 "Network/Socket.hsc" #-}

{-# LINE 1299 "Network/Socket.hsc" #-}

{-# LINE 1302 "Network/Socket.hsc" #-}

{-# LINE 1305 "Network/Socket.hsc" #-}

{-# LINE 1308 "Network/Socket.hsc" #-}

{-# LINE 1311 "Network/Socket.hsc" #-}

{-# LINE 1314 "Network/Socket.hsc" #-}

{-# LINE 1317 "Network/Socket.hsc" #-}

{-# LINE 1318 "Network/Socket.hsc" #-}
        AF_ISDN -> 34
{-# LINE 1319 "Network/Socket.hsc" #-}

{-# LINE 1320 "Network/Socket.hsc" #-}

{-# LINE 1323 "Network/Socket.hsc" #-}

{-# LINE 1326 "Network/Socket.hsc" #-}

{-# LINE 1329 "Network/Socket.hsc" #-}

{-# LINE 1332 "Network/Socket.hsc" #-}

{-# LINE 1335 "Network/Socket.hsc" #-}

{-# LINE 1338 "Network/Socket.hsc" #-}

{-# LINE 1341 "Network/Socket.hsc" #-}

{-# LINE 1344 "Network/Socket.hsc" #-}

{-# LINE 1345 "Network/Socket.hsc" #-}
        AF_NETROM -> 6
{-# LINE 1346 "Network/Socket.hsc" #-}

{-# LINE 1347 "Network/Socket.hsc" #-}

{-# LINE 1348 "Network/Socket.hsc" #-}
        AF_BRIDGE -> 7
{-# LINE 1349 "Network/Socket.hsc" #-}

{-# LINE 1350 "Network/Socket.hsc" #-}

{-# LINE 1351 "Network/Socket.hsc" #-}
        AF_ATMPVC -> 8
{-# LINE 1352 "Network/Socket.hsc" #-}

{-# LINE 1353 "Network/Socket.hsc" #-}

{-# LINE 1354 "Network/Socket.hsc" #-}
        AF_ROSE -> 11
{-# LINE 1355 "Network/Socket.hsc" #-}

{-# LINE 1356 "Network/Socket.hsc" #-}

{-# LINE 1357 "Network/Socket.hsc" #-}
        AF_NETBEUI -> 13
{-# LINE 1358 "Network/Socket.hsc" #-}

{-# LINE 1359 "Network/Socket.hsc" #-}

{-# LINE 1360 "Network/Socket.hsc" #-}
        AF_SECURITY -> 14
{-# LINE 1361 "Network/Socket.hsc" #-}

{-# LINE 1362 "Network/Socket.hsc" #-}

{-# LINE 1363 "Network/Socket.hsc" #-}
        AF_PACKET -> 17
{-# LINE 1364 "Network/Socket.hsc" #-}

{-# LINE 1365 "Network/Socket.hsc" #-}

{-# LINE 1366 "Network/Socket.hsc" #-}
        AF_ASH -> 18
{-# LINE 1367 "Network/Socket.hsc" #-}

{-# LINE 1368 "Network/Socket.hsc" #-}

{-# LINE 1369 "Network/Socket.hsc" #-}
        AF_ECONET -> 19
{-# LINE 1370 "Network/Socket.hsc" #-}

{-# LINE 1371 "Network/Socket.hsc" #-}

{-# LINE 1372 "Network/Socket.hsc" #-}
        AF_ATMSVC -> 20
{-# LINE 1373 "Network/Socket.hsc" #-}

{-# LINE 1374 "Network/Socket.hsc" #-}

{-# LINE 1375 "Network/Socket.hsc" #-}
        AF_IRDA -> 23
{-# LINE 1376 "Network/Socket.hsc" #-}

{-# LINE 1377 "Network/Socket.hsc" #-}

{-# LINE 1378 "Network/Socket.hsc" #-}
        AF_PPPOX -> 24
{-# LINE 1379 "Network/Socket.hsc" #-}

{-# LINE 1380 "Network/Socket.hsc" #-}

{-# LINE 1381 "Network/Socket.hsc" #-}
        AF_WANPIPE -> 25
{-# LINE 1382 "Network/Socket.hsc" #-}

{-# LINE 1383 "Network/Socket.hsc" #-}

{-# LINE 1384 "Network/Socket.hsc" #-}
        AF_BLUETOOTH -> 31
{-# LINE 1385 "Network/Socket.hsc" #-}

{-# LINE 1386 "Network/Socket.hsc" #-}

--------- ----------

unpackFamily f = case f of
        (0) -> AF_UNSPEC
{-# LINE 1391 "Network/Socket.hsc" #-}

{-# LINE 1392 "Network/Socket.hsc" #-}
        (1) -> AF_UNIX
{-# LINE 1393 "Network/Socket.hsc" #-}

{-# LINE 1394 "Network/Socket.hsc" #-}

{-# LINE 1395 "Network/Socket.hsc" #-}
        (2) -> AF_INET
{-# LINE 1396 "Network/Socket.hsc" #-}

{-# LINE 1397 "Network/Socket.hsc" #-}

{-# LINE 1398 "Network/Socket.hsc" #-}
        (10) -> AF_INET6
{-# LINE 1399 "Network/Socket.hsc" #-}

{-# LINE 1400 "Network/Socket.hsc" #-}

{-# LINE 1403 "Network/Socket.hsc" #-}

{-# LINE 1406 "Network/Socket.hsc" #-}

{-# LINE 1409 "Network/Socket.hsc" #-}

{-# LINE 1412 "Network/Socket.hsc" #-}

{-# LINE 1415 "Network/Socket.hsc" #-}

{-# LINE 1418 "Network/Socket.hsc" #-}

{-# LINE 1421 "Network/Socket.hsc" #-}

{-# LINE 1424 "Network/Socket.hsc" #-}

{-# LINE 1425 "Network/Socket.hsc" #-}
        (22) -> AF_SNA
{-# LINE 1426 "Network/Socket.hsc" #-}

{-# LINE 1427 "Network/Socket.hsc" #-}

{-# LINE 1428 "Network/Socket.hsc" #-}
        (12) -> AF_DECnet
{-# LINE 1429 "Network/Socket.hsc" #-}

{-# LINE 1430 "Network/Socket.hsc" #-}

{-# LINE 1433 "Network/Socket.hsc" #-}

{-# LINE 1436 "Network/Socket.hsc" #-}

{-# LINE 1439 "Network/Socket.hsc" #-}

{-# LINE 1440 "Network/Socket.hsc" #-}
        (5) -> AF_APPLETALK
{-# LINE 1441 "Network/Socket.hsc" #-}

{-# LINE 1442 "Network/Socket.hsc" #-}

{-# LINE 1443 "Network/Socket.hsc" #-}
        (16) -> AF_ROUTE
{-# LINE 1444 "Network/Socket.hsc" #-}

{-# LINE 1445 "Network/Socket.hsc" #-}

{-# LINE 1448 "Network/Socket.hsc" #-}

{-# LINE 1451 "Network/Socket.hsc" #-}

{-# LINE 1454 "Network/Socket.hsc" #-}

{-# LINE 1457 "Network/Socket.hsc" #-}

{-# LINE 1462 "Network/Socket.hsc" #-}

{-# LINE 1465 "Network/Socket.hsc" #-}

{-# LINE 1466 "Network/Socket.hsc" #-}
        (9) -> AF_X25
{-# LINE 1467 "Network/Socket.hsc" #-}

{-# LINE 1468 "Network/Socket.hsc" #-}

{-# LINE 1469 "Network/Socket.hsc" #-}
        (3) -> AF_AX25
{-# LINE 1470 "Network/Socket.hsc" #-}

{-# LINE 1471 "Network/Socket.hsc" #-}

{-# LINE 1474 "Network/Socket.hsc" #-}

{-# LINE 1477 "Network/Socket.hsc" #-}

{-# LINE 1478 "Network/Socket.hsc" #-}
        (4) -> AF_IPX
{-# LINE 1479 "Network/Socket.hsc" #-}

{-# LINE 1480 "Network/Socket.hsc" #-}

{-# LINE 1483 "Network/Socket.hsc" #-}

{-# LINE 1486 "Network/Socket.hsc" #-}

{-# LINE 1489 "Network/Socket.hsc" #-}

{-# LINE 1492 "Network/Socket.hsc" #-}

{-# LINE 1495 "Network/Socket.hsc" #-}

{-# LINE 1498 "Network/Socket.hsc" #-}

{-# LINE 1501 "Network/Socket.hsc" #-}

{-# LINE 1504 "Network/Socket.hsc" #-}

{-# LINE 1507 "Network/Socket.hsc" #-}

{-# LINE 1510 "Network/Socket.hsc" #-}

{-# LINE 1513 "Network/Socket.hsc" #-}

{-# LINE 1516 "Network/Socket.hsc" #-}

{-# LINE 1517 "Network/Socket.hsc" #-}
        (34) -> AF_ISDN
{-# LINE 1518 "Network/Socket.hsc" #-}

{-# LINE 1519 "Network/Socket.hsc" #-}

{-# LINE 1522 "Network/Socket.hsc" #-}

{-# LINE 1525 "Network/Socket.hsc" #-}

{-# LINE 1528 "Network/Socket.hsc" #-}

{-# LINE 1531 "Network/Socket.hsc" #-}

{-# LINE 1534 "Network/Socket.hsc" #-}

{-# LINE 1537 "Network/Socket.hsc" #-}

{-# LINE 1540 "Network/Socket.hsc" #-}

{-# LINE 1543 "Network/Socket.hsc" #-}

{-# LINE 1544 "Network/Socket.hsc" #-}
        (6) -> AF_NETROM
{-# LINE 1545 "Network/Socket.hsc" #-}

{-# LINE 1546 "Network/Socket.hsc" #-}

{-# LINE 1547 "Network/Socket.hsc" #-}
        (7) -> AF_BRIDGE
{-# LINE 1548 "Network/Socket.hsc" #-}

{-# LINE 1549 "Network/Socket.hsc" #-}

{-# LINE 1550 "Network/Socket.hsc" #-}
        (8) -> AF_ATMPVC
{-# LINE 1551 "Network/Socket.hsc" #-}

{-# LINE 1552 "Network/Socket.hsc" #-}

{-# LINE 1553 "Network/Socket.hsc" #-}
        (11) -> AF_ROSE
{-# LINE 1554 "Network/Socket.hsc" #-}

{-# LINE 1555 "Network/Socket.hsc" #-}

{-# LINE 1556 "Network/Socket.hsc" #-}
        (13) -> AF_NETBEUI
{-# LINE 1557 "Network/Socket.hsc" #-}

{-# LINE 1558 "Network/Socket.hsc" #-}

{-# LINE 1559 "Network/Socket.hsc" #-}
        (14) -> AF_SECURITY
{-# LINE 1560 "Network/Socket.hsc" #-}

{-# LINE 1561 "Network/Socket.hsc" #-}

{-# LINE 1562 "Network/Socket.hsc" #-}
        (17) -> AF_PACKET
{-# LINE 1563 "Network/Socket.hsc" #-}

{-# LINE 1564 "Network/Socket.hsc" #-}

{-# LINE 1565 "Network/Socket.hsc" #-}
        (18) -> AF_ASH
{-# LINE 1566 "Network/Socket.hsc" #-}

{-# LINE 1567 "Network/Socket.hsc" #-}

{-# LINE 1568 "Network/Socket.hsc" #-}
        (19) -> AF_ECONET
{-# LINE 1569 "Network/Socket.hsc" #-}

{-# LINE 1570 "Network/Socket.hsc" #-}

{-# LINE 1571 "Network/Socket.hsc" #-}
        (20) -> AF_ATMSVC
{-# LINE 1572 "Network/Socket.hsc" #-}

{-# LINE 1573 "Network/Socket.hsc" #-}

{-# LINE 1574 "Network/Socket.hsc" #-}
        (23) -> AF_IRDA
{-# LINE 1575 "Network/Socket.hsc" #-}

{-# LINE 1576 "Network/Socket.hsc" #-}

{-# LINE 1577 "Network/Socket.hsc" #-}
        (24) -> AF_PPPOX
{-# LINE 1578 "Network/Socket.hsc" #-}

{-# LINE 1579 "Network/Socket.hsc" #-}

{-# LINE 1580 "Network/Socket.hsc" #-}
        (25) -> AF_WANPIPE
{-# LINE 1581 "Network/Socket.hsc" #-}

{-# LINE 1582 "Network/Socket.hsc" #-}

{-# LINE 1583 "Network/Socket.hsc" #-}
        (31) -> AF_BLUETOOTH
{-# LINE 1584 "Network/Socket.hsc" #-}

{-# LINE 1585 "Network/Socket.hsc" #-}
        unknown -> error ("Network.Socket.unpackFamily: unknown address " ++
                          "family " ++ show unknown)

-- Socket Types.

-- | Socket Types.
--
-- This data type might have different constructors depending on what is
-- supported by the operating system.
data SocketType
        = NoSocketType

{-# LINE 1597 "Network/Socket.hsc" #-}
        | Stream 

{-# LINE 1599 "Network/Socket.hsc" #-}

{-# LINE 1600 "Network/Socket.hsc" #-}
        | Datagram

{-# LINE 1602 "Network/Socket.hsc" #-}

{-# LINE 1603 "Network/Socket.hsc" #-}
        | Raw 

{-# LINE 1605 "Network/Socket.hsc" #-}

{-# LINE 1606 "Network/Socket.hsc" #-}
        | RDM 

{-# LINE 1608 "Network/Socket.hsc" #-}

{-# LINE 1609 "Network/Socket.hsc" #-}
        | SeqPacket

{-# LINE 1611 "Network/Socket.hsc" #-}
        deriving (Eq, Ord, Read, Show, Typeable)

packSocketType stype = case stype of
        NoSocketType -> 0

{-# LINE 1616 "Network/Socket.hsc" #-}
        Stream -> 1
{-# LINE 1617 "Network/Socket.hsc" #-}

{-# LINE 1618 "Network/Socket.hsc" #-}

{-# LINE 1619 "Network/Socket.hsc" #-}
        Datagram -> 2
{-# LINE 1620 "Network/Socket.hsc" #-}

{-# LINE 1621 "Network/Socket.hsc" #-}

{-# LINE 1622 "Network/Socket.hsc" #-}
        Raw -> 3
{-# LINE 1623 "Network/Socket.hsc" #-}

{-# LINE 1624 "Network/Socket.hsc" #-}

{-# LINE 1625 "Network/Socket.hsc" #-}
        RDM -> 4
{-# LINE 1626 "Network/Socket.hsc" #-}

{-# LINE 1627 "Network/Socket.hsc" #-}

{-# LINE 1628 "Network/Socket.hsc" #-}
        SeqPacket -> 5
{-# LINE 1629 "Network/Socket.hsc" #-}

{-# LINE 1630 "Network/Socket.hsc" #-}

unpackSocketType t = case t of
        0 -> NoSocketType

{-# LINE 1634 "Network/Socket.hsc" #-}
        (1) -> Stream
{-# LINE 1635 "Network/Socket.hsc" #-}

{-# LINE 1636 "Network/Socket.hsc" #-}

{-# LINE 1637 "Network/Socket.hsc" #-}
        (2) -> Datagram
{-# LINE 1638 "Network/Socket.hsc" #-}

{-# LINE 1639 "Network/Socket.hsc" #-}

{-# LINE 1640 "Network/Socket.hsc" #-}
        (3) -> Raw
{-# LINE 1641 "Network/Socket.hsc" #-}

{-# LINE 1642 "Network/Socket.hsc" #-}

{-# LINE 1643 "Network/Socket.hsc" #-}
        (4) -> RDM
{-# LINE 1644 "Network/Socket.hsc" #-}

{-# LINE 1645 "Network/Socket.hsc" #-}

{-# LINE 1646 "Network/Socket.hsc" #-}
        (5) -> SeqPacket
{-# LINE 1647 "Network/Socket.hsc" #-}

{-# LINE 1648 "Network/Socket.hsc" #-}
        _ -> NoSocketType

-- ---------------------------------------------------------------------------
-- Utility Functions

aNY_PORT :: PortNumber 
aNY_PORT = 0

-- | The IPv4 wild card address.

iNADDR_ANY :: HostAddress
iNADDR_ANY = htonl (0)
{-# LINE 1660 "Network/Socket.hsc" #-}


{-# LINE 1662 "Network/Socket.hsc" #-}
-- | The IPv6 wild card address.

iN6ADDR_ANY :: HostAddress6
iN6ADDR_ANY = (0, 0, 0, 0)

{-# LINE 1667 "Network/Socket.hsc" #-}

sOMAXCONN :: Int
sOMAXCONN = 128
{-# LINE 1670 "Network/Socket.hsc" #-}

sOL_SOCKET :: Int
sOL_SOCKET = 1
{-# LINE 1673 "Network/Socket.hsc" #-}


{-# LINE 1675 "Network/Socket.hsc" #-}
sCM_RIGHTS :: Int
sCM_RIGHTS = 1
{-# LINE 1677 "Network/Socket.hsc" #-}

{-# LINE 1678 "Network/Socket.hsc" #-}

maxListenQueue :: Int
maxListenQueue = sOMAXCONN

-- -----------------------------------------------------------------------------

data ShutdownCmd 
 = ShutdownReceive
 | ShutdownSend
 | ShutdownBoth
 deriving Typeable

sdownCmdToInt :: ShutdownCmd -> CInt
sdownCmdToInt ShutdownReceive = 0
sdownCmdToInt ShutdownSend    = 1
sdownCmdToInt ShutdownBoth    = 2

-- | Shut down one or both halves of the connection, depending on the
-- second argument to the function.  If the second argument is
-- 'ShutdownReceive', further receives are disallowed.  If it is
-- 'ShutdownSend', further sends are disallowed.  If it is
-- 'ShutdownBoth', further sends and receives are disallowed.
shutdown :: Socket -> ShutdownCmd -> IO ()
shutdown (MkSocket s _ _ _ _) stype = do
  throwSocketErrorIfMinus1Retry "shutdown" (c_shutdown s (sdownCmdToInt stype))
  return ()

-- -----------------------------------------------------------------------------

-- | Close the socket.  All future operations on the socket object
-- will fail.  The remote end will receive no more data (after queued
-- data is flushed).
sClose   :: Socket -> IO ()
sClose (MkSocket s _ _ _ socketStatus) = do 
 modifyMVar_ socketStatus $ \ status ->
   case status of
     ConvertedToHandle ->
         ioError (userError ("sClose: converted to a Handle, use hClose instead"))
     Closed ->
         return status
     _ -> closeFdWith (close . fromIntegral) (fromIntegral s) >> return Closed

-- -----------------------------------------------------------------------------

sIsConnected :: Socket -> IO Bool
sIsConnected (MkSocket _ _ _ _ status) = do
    value <- readMVar status
    return (value == Connected) 

-- -----------------------------------------------------------------------------
-- Socket Predicates

sIsBound :: Socket -> IO Bool
sIsBound (MkSocket _ _ _ _ status) = do
    value <- readMVar status
    return (value == Bound)     

sIsListening :: Socket -> IO Bool
sIsListening (MkSocket _ _ _  _ status) = do
    value <- readMVar status
    return (value == Listening) 

sIsReadable  :: Socket -> IO Bool
sIsReadable (MkSocket _ _ _ _ status) = do
    value <- readMVar status
    return (value == Listening || value == Connected)

sIsWritable  :: Socket -> IO Bool
sIsWritable = sIsReadable -- sort of.

sIsAcceptable :: Socket -> IO Bool

{-# LINE 1750 "Network/Socket.hsc" #-}
sIsAcceptable (MkSocket _ AF_UNIX x _ status)
    | x == Stream || x == SeqPacket = do
        value <- readMVar status
        return (value == Connected || value == Bound || value == Listening)
sIsAcceptable (MkSocket _ AF_UNIX _ _ _) = return False

{-# LINE 1756 "Network/Socket.hsc" #-}
sIsAcceptable (MkSocket _ _ _ _ status) = do
    value <- readMVar status
    return (value == Connected || value == Listening)
    
-- -----------------------------------------------------------------------------
-- Internet address manipulation routines:

inet_addr :: String -> IO HostAddress
inet_addr ipstr = do
   withCString ipstr $ \str -> do
   had <- c_inet_addr str
   if had == -1
    then ioError (userError ("inet_addr: Malformed address: " ++ ipstr))
    else return had  -- network byte order

inet_ntoa :: HostAddress -> IO String
inet_ntoa haddr = do
  pstr <- c_inet_ntoa haddr
  peekCString pstr

-- | Turns a Socket into an 'Handle'. By default, the new handle is
-- unbuffered. Use 'System.IO.hSetBuffering' to change the buffering.
--
-- Note that since a 'Handle' is automatically closed by a finalizer
-- when it is no longer referenced, you should avoid doing any more
-- operations on the 'Socket' after calling 'socketToHandle'.  To
-- close the 'Socket' after 'socketToHandle', call 'System.IO.hClose'
-- on the 'Handle'.


{-# LINE 1786 "Network/Socket.hsc" #-}
socketToHandle :: Socket -> IOMode -> IO Handle
socketToHandle s@(MkSocket fd _ _ _ socketStatus) mode = do
 modifyMVar socketStatus $ \ status ->
    if status == ConvertedToHandle
        then ioError (userError ("socketToHandle: already a Handle"))
        else do

{-# LINE 1793 "Network/Socket.hsc" #-}
    h <- fdToHandle' (fromIntegral fd) (Just GHC.IO.Device.Stream) True (show s) mode True{-bin-}

{-# LINE 1801 "Network/Socket.hsc" #-}
    return (ConvertedToHandle, h)

{-# LINE 1806 "Network/Socket.hsc" #-}

-- | Pack a list of values into a bitmask.  The possible mappings from
-- value to bit-to-set are given as the first argument.  We assume
-- that each value can cause exactly one bit to be set; unpackBits will
-- break if this property is not true.

packBits :: (Eq a, Num b, Bits b) => [(a, b)] -> [a] -> b

packBits mapping xs = foldl' pack 0 mapping
    where pack acc (k, v) | k `elem` xs = acc .|. v
                          | otherwise   = acc

-- | Unpack a bitmask into a list of values.

unpackBits :: (Num b, Bits b) => [(a, b)] -> b -> [a]

-- Be permissive and ignore unknown bit values. At least on OS X,
-- getaddrinfo returns an ai_flags field with bits set that have no
-- entry in <netdb.h>.
unpackBits [] _    = []
unpackBits ((k,v):xs) r
    | r .&. v /= 0 = k : unpackBits xs (r .&. complement v)
    | otherwise    = unpackBits xs r

-----------------------------------------------------------------------------
-- Address and service lookups


{-# LINE 1834 "Network/Socket.hsc" #-}

-- | Flags that control the querying behaviour of 'getAddrInfo'.
data AddrInfoFlag
    = AI_ADDRCONFIG
    | AI_ALL
    | AI_CANONNAME
    | AI_NUMERICHOST
    | AI_NUMERICSERV
    | AI_PASSIVE
    | AI_V4MAPPED
    deriving (Eq, Read, Show, Typeable)

aiFlagMapping :: [(AddrInfoFlag, CInt)]

aiFlagMapping =
    [

{-# LINE 1851 "Network/Socket.hsc" #-}
     (AI_ADDRCONFIG, 32),
{-# LINE 1852 "Network/Socket.hsc" #-}

{-# LINE 1855 "Network/Socket.hsc" #-}

{-# LINE 1856 "Network/Socket.hsc" #-}
     (AI_ALL, 16),
{-# LINE 1857 "Network/Socket.hsc" #-}

{-# LINE 1860 "Network/Socket.hsc" #-}
     (AI_CANONNAME, 2),
{-# LINE 1861 "Network/Socket.hsc" #-}
     (AI_NUMERICHOST, 4),
{-# LINE 1862 "Network/Socket.hsc" #-}

{-# LINE 1863 "Network/Socket.hsc" #-}
     (AI_NUMERICSERV, 1024),
{-# LINE 1864 "Network/Socket.hsc" #-}

{-# LINE 1867 "Network/Socket.hsc" #-}
     (AI_PASSIVE, 1),
{-# LINE 1868 "Network/Socket.hsc" #-}

{-# LINE 1869 "Network/Socket.hsc" #-}
     (AI_V4MAPPED, 8)
{-# LINE 1870 "Network/Socket.hsc" #-}

{-# LINE 1873 "Network/Socket.hsc" #-}
    ]

-- | Indicate whether the given 'AddrInfoFlag' will have any effect on
-- this system.
addrInfoFlagImplemented :: AddrInfoFlag -> Bool
addrInfoFlagImplemented f = packBits aiFlagMapping [f] /= 0

data AddrInfo =
    AddrInfo {
        addrFlags :: [AddrInfoFlag],
        addrFamily :: Family,
        addrSocketType :: SocketType,
        addrProtocol :: ProtocolNumber,
        addrAddress :: SockAddr,
        addrCanonName :: Maybe String
        }
    deriving (Eq, Show, Typeable)

instance Storable AddrInfo where
    sizeOf    _ = 32
{-# LINE 1893 "Network/Socket.hsc" #-}
    alignment _ = alignment (undefined :: CInt)

    peek p = do
        ai_flags <- ((\hsc_ptr -> peekByteOff hsc_ptr 0)) p
{-# LINE 1897 "Network/Socket.hsc" #-}
        ai_family <- ((\hsc_ptr -> peekByteOff hsc_ptr 4)) p
{-# LINE 1898 "Network/Socket.hsc" #-}
        ai_socktype <- ((\hsc_ptr -> peekByteOff hsc_ptr 8)) p
{-# LINE 1899 "Network/Socket.hsc" #-}
        ai_protocol <- ((\hsc_ptr -> peekByteOff hsc_ptr 12)) p
{-# LINE 1900 "Network/Socket.hsc" #-}
        ai_addr <- ((\hsc_ptr -> peekByteOff hsc_ptr 20)) p >>= peekSockAddr
{-# LINE 1901 "Network/Socket.hsc" #-}
        ai_canonname_ptr <- ((\hsc_ptr -> peekByteOff hsc_ptr 24)) p
{-# LINE 1902 "Network/Socket.hsc" #-}

        ai_canonname <- if ai_canonname_ptr == nullPtr
                        then return Nothing
                        else liftM Just $ peekCString ai_canonname_ptr
                             
        return (AddrInfo
                {
                 addrFlags = unpackBits aiFlagMapping ai_flags,
                 addrFamily = unpackFamily ai_family,
                 addrSocketType = unpackSocketType ai_socktype,
                 addrProtocol = ai_protocol,
                 addrAddress = ai_addr,
                 addrCanonName = ai_canonname
                })

    poke p (AddrInfo flags family socketType protocol _ _) = do
        ((\hsc_ptr -> pokeByteOff hsc_ptr 0)) p (packBits aiFlagMapping flags)
{-# LINE 1919 "Network/Socket.hsc" #-}
        ((\hsc_ptr -> pokeByteOff hsc_ptr 4)) p (packFamily family)
{-# LINE 1920 "Network/Socket.hsc" #-}
        ((\hsc_ptr -> pokeByteOff hsc_ptr 8)) p (packSocketType socketType)
{-# LINE 1921 "Network/Socket.hsc" #-}
        ((\hsc_ptr -> pokeByteOff hsc_ptr 12)) p protocol
{-# LINE 1922 "Network/Socket.hsc" #-}

        -- stuff below is probably not needed, but let's zero it for safety

        ((\hsc_ptr -> pokeByteOff hsc_ptr 16)) p (0::CSize)
{-# LINE 1926 "Network/Socket.hsc" #-}
        ((\hsc_ptr -> pokeByteOff hsc_ptr 20)) p nullPtr
{-# LINE 1927 "Network/Socket.hsc" #-}
        ((\hsc_ptr -> pokeByteOff hsc_ptr 24)) p nullPtr
{-# LINE 1928 "Network/Socket.hsc" #-}
        ((\hsc_ptr -> pokeByteOff hsc_ptr 28)) p nullPtr
{-# LINE 1929 "Network/Socket.hsc" #-}

data NameInfoFlag
    = NI_DGRAM
    | NI_NAMEREQD
    | NI_NOFQDN
    | NI_NUMERICHOST
    | NI_NUMERICSERV
    deriving (Eq, Read, Show, Typeable)

niFlagMapping :: [(NameInfoFlag, CInt)]

niFlagMapping = [(NI_DGRAM, 16),
{-# LINE 1941 "Network/Socket.hsc" #-}
                 (NI_NAMEREQD, 8),
{-# LINE 1942 "Network/Socket.hsc" #-}
                 (NI_NOFQDN, 4),
{-# LINE 1943 "Network/Socket.hsc" #-}
                 (NI_NUMERICHOST, 1),
{-# LINE 1944 "Network/Socket.hsc" #-}
                 (NI_NUMERICSERV, 2)]
{-# LINE 1945 "Network/Socket.hsc" #-}

-- | Default hints for address lookup with 'getAddrInfo'.  The values
-- of the 'addrAddress' and 'addrCanonName' fields are 'undefined',
-- and are never inspected by 'getAddrInfo'.

defaultHints :: AddrInfo

defaultHints = AddrInfo {
                         addrFlags = [],
                         addrFamily = AF_UNSPEC,
                         addrSocketType = NoSocketType,
                         addrProtocol = defaultProtocol,
                         addrAddress = undefined,
                         addrCanonName = undefined
                        }

-- | Resolve a host or service name to one or more addresses.
-- The 'AddrInfo' values that this function returns contain 'SockAddr'
-- values that you can pass directly to 'connect' or
-- 'bindSocket'.
--
-- This function is protocol independent.  It can return both IPv4 and
-- IPv6 address information.
--
-- The 'AddrInfo' argument specifies the preferred query behaviour,
-- socket options, or protocol.  You can override these conveniently
-- using Haskell's record update syntax on 'defaultHints', for example
-- as follows:
--
-- @
--   myHints = defaultHints { addrFlags = [AI_ADDRCONFIG, AI_CANONNAME] }
-- @
--
-- Values for 'addrFlags' control query behaviour.  The supported
-- flags are as follows:
--
--   [@AI_PASSIVE@] If no 'HostName' value is provided, the network
--     address in each 'SockAddr'
--     will be left as a "wild card", i.e. as either 'iNADDR_ANY'
--     or 'iN6ADDR_ANY'.  This is useful for server applications that
--     will accept connections from any client.
--
--   [@AI_CANONNAME@] The 'addrCanonName' field of the first returned
--     'AddrInfo' will contain the "canonical name" of the host.
--
--   [@AI_NUMERICHOST@] The 'HostName' argument /must/ be a numeric
--     address in string form, and network name lookups will not be
--     attempted.
-- 
-- /Note/: Although the following flags are required by RFC 3493, they
-- may not have an effect on all platforms, because the underlying
-- network stack may not support them.  To see whether a flag from the
-- list below will have any effect, call 'addrInfoFlagImplemented'.
--
--   [@AI_NUMERICSERV@] The 'ServiceName' argument /must/ be a port
--     number in string form, and service name lookups will not be
--     attempted.
--
--   [@AI_ADDRCONFIG@] The list of returned 'AddrInfo' values will
--     only contain IPv4 addresses if the local system has at least
--     one IPv4 interface configured, and likewise for IPv6.
--
--   [@AI_V4MAPPED@] If an IPv6 lookup is performed, and no IPv6
--     addresses are found, IPv6-mapped IPv4 addresses will be
--     returned.
--
--   [@AI_ALL@] If 'AI_ALL' is specified, return all matching IPv6 and
--     IPv4 addresses.  Otherwise, this flag has no effect.
--     
-- You must provide a 'Just' value for at least one of the 'HostName'
-- or 'ServiceName' arguments.  'HostName' can be either a numeric
-- network address (dotted quad for IPv4, colon-separated hex for
-- IPv6) or a hostname.  In the latter case, its addresses will be
-- looked up unless 'AI_NUMERICHOST' is specified as a hint.  If you
-- do not provide a 'HostName' value /and/ do not set 'AI_PASSIVE' as
-- a hint, network addresses in the result will contain the address of
-- the loopback interface.
--
-- If the query fails, this function throws an IO exception instead of
-- returning an empty list.  Otherwise, it returns a non-empty list
-- of 'AddrInfo' values.
--
-- There are several reasons why a query might result in several
-- values.  For example, the queried-for host could be multihomed, or
-- the service might be available via several protocols.
--
-- Note: the order of arguments is slightly different to that defined
-- for @getaddrinfo@ in RFC 2553.  The 'AddrInfo' parameter comes first
-- to make partial application easier.
--
-- Example:
-- @
--   let hints = defaultHints { addrFlags = [AI_ADDRCONFIG, AI_CANONNAME] }
--   addrs <- getAddrInfo (Just hints) (Just "www.haskell.org") (Just "http")
--   let addr = head addrs
--   sock <- socket (addrFamily addr) (addrSocketType addr) (addrProtocol addr)
--   connect sock (addrAddress addr)
-- @

getAddrInfo :: Maybe AddrInfo -- ^ preferred socket type or protocol
            -> Maybe HostName -- ^ host name to look up
            -> Maybe ServiceName -- ^ service name to look up
            -> IO [AddrInfo] -- ^ resolved addresses, with "best" first

getAddrInfo hints node service =
  maybeWith withCString node $ \c_node ->
    maybeWith withCString service $ \c_service ->
      maybeWith with hints $ \c_hints ->
        alloca $ \ptr_ptr_addrs -> do
          ret <- c_getaddrinfo c_node c_service c_hints ptr_ptr_addrs
          case ret of
            0 -> do ptr_addrs <- peek ptr_ptr_addrs
                    ais <- followAddrInfo ptr_addrs
                    c_freeaddrinfo ptr_addrs
                    return ais
            _ -> do err <- gai_strerror ret
                    ioError (ioeSetErrorString
                             (mkIOError NoSuchThing "getAddrInfo" Nothing
                              Nothing) err)

followAddrInfo :: Ptr AddrInfo -> IO [AddrInfo]

followAddrInfo ptr_ai | ptr_ai == nullPtr = return []
                      | otherwise = do
    a <- peek ptr_ai
    as <- ((\hsc_ptr -> peekByteOff hsc_ptr 28)) ptr_ai >>= followAddrInfo
{-# LINE 2071 "Network/Socket.hsc" #-}
    return (a:as)

foreign import ccall safe "hsnet_getaddrinfo"
    c_getaddrinfo :: CString -> CString -> Ptr AddrInfo -> Ptr (Ptr AddrInfo)
                  -> IO CInt

foreign import ccall safe "hsnet_freeaddrinfo"
    c_freeaddrinfo :: Ptr AddrInfo -> IO ()

gai_strerror :: CInt -> IO String


{-# LINE 2083 "Network/Socket.hsc" #-}
gai_strerror n = c_gai_strerror n >>= peekCString

foreign import ccall safe "gai_strerror"
    c_gai_strerror :: CInt -> IO CString

{-# LINE 2090 "Network/Socket.hsc" #-}

withCStringIf :: Bool -> Int -> (CSize -> CString -> IO a) -> IO a
withCStringIf False _ f = f 0 nullPtr
withCStringIf True n f = allocaBytes n (f (fromIntegral n))
                    
-- | Resolve an address to a host or service name.
-- This function is protocol independent.
--
-- The list of 'NameInfoFlag' values controls query behaviour.  The
-- supported flags are as follows:
--
--   [@NI_NOFQDN@] If a host is local, return only the
--     hostname part of the FQDN.
--
--   [@NI_NUMERICHOST@] The name of the host is not
--     looked up.  Instead, a numeric representation of the host's
--     address is returned.  For an IPv4 address, this will be a
--     dotted-quad string.  For IPv6, it will be colon-separated
--     hexadecimal.
--
--   [@NI_NUMERICSERV@] The name of the service is not
--     looked up.  Instead, a numeric representation of the
--     service is returned.
--
--   [@NI_NAMEREQD@] If the hostname cannot be looked up, an IO error
--     is thrown.
--
--   [@NI_DGRAM@] Resolve a datagram-based service name.  This is
--     required only for the few protocols that have different port
--     numbers for their datagram-based versions than for their
--     stream-based versions.
--
-- Hostname and service name lookups can be expensive.  You can
-- specify which lookups to perform via the two 'Bool' arguments.  If
-- one of these is 'False', the corresponding value in the returned
-- tuple will be 'Nothing', and no lookup will be performed.
--
-- If a host or service's name cannot be looked up, then the numeric
-- form of the address or service will be returned.
--
-- If the query fails, this function throws an IO exception.
--
-- Example:
-- @
--   (hostName, _) <- getNameInfo [] True False myAddress
-- @

getNameInfo :: [NameInfoFlag] -- ^ flags to control lookup behaviour
            -> Bool -- ^ whether to look up a hostname
            -> Bool -- ^ whether to look up a service name
            -> SockAddr -- ^ the address to look up
            -> IO (Maybe HostName, Maybe ServiceName)

getNameInfo flags doHost doService addr =
  withCStringIf doHost (1025) $ \c_hostlen c_host ->
{-# LINE 2145 "Network/Socket.hsc" #-}
    withCStringIf doService (32) $ \c_servlen c_serv -> do
{-# LINE 2146 "Network/Socket.hsc" #-}
      withSockAddr addr $ \ptr_addr sz -> do
        ret <- c_getnameinfo ptr_addr (fromIntegral sz) c_host c_hostlen
                             c_serv c_servlen (packBits niFlagMapping flags)
        case ret of
          0 -> do
            let peekIf doIf c_val = if doIf
                                     then liftM Just $ peekCString c_val
                                     else return Nothing
            host <- peekIf doHost c_host
            serv <- peekIf doService c_serv
            return (host, serv)
          _ -> do err <- gai_strerror ret
                  ioError (ioeSetErrorString
                           (mkIOError NoSuchThing "getNameInfo" Nothing 
                            Nothing) err)

foreign import ccall safe "hsnet_getnameinfo"
    c_getnameinfo :: Ptr SockAddr -> CInt{-CSockLen???-} -> CString -> CSize -> CString
                  -> CSize -> CInt -> IO CInt

{-# LINE 2166 "Network/Socket.hsc" #-}

mkInvalidRecvArgError :: String -> IOError
mkInvalidRecvArgError loc = ioeSetErrorString (mkIOError

{-# LINE 2170 "Network/Socket.hsc" #-}
                                    InvalidArgument

{-# LINE 2174 "Network/Socket.hsc" #-}
                                    loc Nothing Nothing) "non-positive length"

mkEOFError :: String -> IOError
mkEOFError loc = ioeSetErrorString (mkIOError EOF loc Nothing Nothing) "end of file"

-- ---------------------------------------------------------------------------
-- foreign imports from the C library

foreign import ccall unsafe "my_inet_ntoa"
  c_inet_ntoa :: HostAddress -> IO (Ptr CChar)

foreign import CALLCONV unsafe "inet_addr"
  c_inet_addr :: Ptr CChar -> IO HostAddress

foreign import CALLCONV unsafe "shutdown"
  c_shutdown :: CInt -> CInt -> IO CInt 

close :: CInt -> IO ()
close fd = throwErrnoIfMinus1Retry_ "Network.Socket.close" $ c_close fd


{-# LINE 2195 "Network/Socket.hsc" #-}
foreign import ccall unsafe "close"
  c_close :: CInt -> IO CInt

{-# LINE 2201 "Network/Socket.hsc" #-}

foreign import CALLCONV unsafe "socket"
  c_socket :: CInt -> CInt -> CInt -> IO CInt
foreign import CALLCONV unsafe "bind"
  c_bind :: CInt -> Ptr SockAddr -> CInt{-CSockLen???-} -> IO CInt
foreign import CALLCONV unsafe "connect"
  c_connect :: CInt -> Ptr SockAddr -> CInt{-CSockLen???-} -> IO CInt
foreign import CALLCONV unsafe "accept"
  c_accept :: CInt -> Ptr SockAddr -> Ptr CInt{-CSockLen???-} -> IO CInt
foreign import CALLCONV unsafe "listen"
  c_listen :: CInt -> CInt -> IO CInt


{-# LINE 2219 "Network/Socket.hsc" #-}

foreign import CALLCONV unsafe "send"
  c_send :: CInt -> Ptr a -> CSize -> CInt -> IO CInt
foreign import CALLCONV SAFE_ON_WIN "sendto"
  c_sendto :: CInt -> Ptr a -> CSize -> CInt -> Ptr SockAddr -> CInt -> IO CInt
foreign import CALLCONV unsafe "recv"
  c_recv :: CInt -> Ptr CChar -> CSize -> CInt -> IO CInt
foreign import CALLCONV SAFE_ON_WIN "recvfrom"
  c_recvfrom :: CInt -> Ptr a -> CSize -> CInt -> Ptr SockAddr -> Ptr CInt -> IO CInt
foreign import CALLCONV unsafe "getpeername"
  c_getpeername :: CInt -> Ptr SockAddr -> Ptr CInt -> IO CInt
foreign import CALLCONV unsafe "getsockname"
  c_getsockname :: CInt -> Ptr SockAddr -> Ptr CInt -> IO CInt

foreign import CALLCONV unsafe "getsockopt"
  c_getsockopt :: CInt -> CInt -> CInt -> Ptr CInt -> Ptr CInt -> IO CInt
foreign import CALLCONV unsafe "setsockopt"
  c_setsockopt :: CInt -> CInt -> CInt -> Ptr CInt -> CInt -> IO CInt