Z-IO-0.1.2.0: Z/IO/Network/SocketAddr.hsc
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE UnliftedFFITypes #-}
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE UnboxedTuples #-}
{-# LANGUAGE MagicHash #-}
{-|
Module : Z.IO.Network.SocketAddr
Description : TCP/UDP socket address API
Copyright : (c) Winterland, 2018
License : BSD
Maintainer : drkoster@qq.com
Stability : experimental
Portability : non-portable
This module provides necessary types and constant for low level socket address manipulating.
-}
module Z.IO.Network.SocketAddr
( -- * name to address
SocketAddr(..)
, ipv4, ipv6
, sockAddrFamily
, withSocketAddr
, withSocketAddrUnsafe
, sizeOfSocketAddr
, withSocketAddrStorage
, withSocketAddrStorageUnsafe
, sizeOfSocketAddrStorage
-- ** IPv4 address
, InetAddr(..)
, inetAny
, inetBroadcast
, inetNone
, inetLoopback
, inetUnspecificGroup
, inetAllHostsGroup
, inetMaxLocalGroup
, inetAddrToTuple
, tupleToInetAddr
-- ** IPv6 address
, Inet6Addr(..)
, inet6Any
, inet6Loopback
, inet6AddrToTuple
, tupleToInet6Addr
, FlowInfo
, ScopeID
-- * port numbber
, PortNumber(..)
, portAny
-- * family, type, protocol
, SocketFamily(AF_UNSPEC, AF_INET, AF_INET6)
, SocketType(SOCK_DGRAM, SOCK_STREAM, SOCK_SEQPACKET, SOCK_RAW, SOCK_RDM, SOCK_ANY)
, ProtocolNumber(IPPROTO_DEFAULT, IPPROTO_IP, IPPROTO_TCP, IPPROTO_UDP)
-- * Internal helper
, peekSocketAddr
, pokeSocketAddr
, peekSocketAddrMBA
, pokeSocketAddrMBA
, htons
, ntohs
, ntohl
, htonl
) where
import Data.Bits
import qualified Data.List as List
import Data.Typeable
import Foreign
import Foreign.C
import Numeric (showHex)
import System.IO.Unsafe
import Text.Read
import Z.Data.CBytes
import Z.IO.Exception
import Z.IO.UV.Errno
import Z.Foreign
#include "hs_uv.h"
#if defined(i386_HOST_ARCH) && defined(mingw32_HOST_OS)
#let CALLCONV = "stdcall"
#else
#let CALLCONV = "ccall"
#endif
--------------------------------------------------------------------------------
#if defined(_WIN32)
type CSaFamily = (#type unsigned short)
#elif defined(darwin_HOST_OS)
type CSaFamily = (#type u_char)
#else
type CSaFamily = (#type sa_family_t)
#endif
-- | IPv4 or IPv6 socket address, i.e. the `sockaddr_in` or `sockaddr_in6` struct.
--
data SocketAddr
= SocketAddrInet
{-# UNPACK #-} !PortNumber -- sin_port (network byte order)
{-# UNPACK #-} !InetAddr -- sin_addr (ditto)
| SocketAddrInet6
{-# UNPACK #-} !PortNumber -- sin6_port (network byte order)
{-# UNPACK #-} !FlowInfo -- sin6_flowinfo (ditto)
{-# UNPACK #-} !Inet6Addr -- sin6_addr (ditto)
{-# UNPACK #-} !ScopeID -- sin6_scope_id (ditto)
deriving (Eq, Ord, Typeable)
instance Show SocketAddr where
showsPrec _ (SocketAddrInet port ia)
= shows ia . showString ":" . shows port
showsPrec _ (SocketAddrInet6 port _ ia6 _)
= ('[':) . shows ia6 . showString "]:" . shows port
-- Taken from showIPv6 in Data.IP.Addr.
-- | Show an IPv6 address in the most appropriate notation, based on recommended
-- representation proposed by <http://tools.ietf.org/html/rfc5952 RFC 5952>.
--
-- /The implementation is completely compatible with the current implementation
-- of the `inet_ntop` function in glibc./
--
sockAddrFamily :: SocketAddr -> SocketFamily
sockAddrFamily (SocketAddrInet _ _) = AF_INET
sockAddrFamily (SocketAddrInet6 _ _ _ _) = AF_INET6
type FlowInfo = Word32
type ScopeID = Word32
-- | Convert a string containing an IPv4 addresses to a binary structure
--
-- This is partial function, wrong address will throw 'InvalidArgument' exception.
ipv4:: HasCallStack => CBytes -> PortNumber -> SocketAddr
ipv4 str (PortNumber port) = unsafeDupablePerformIO . withSocketAddrStorageUnsafe $ \ p ->
withCBytes str $ \ cstr -> throwUVIfMinus_ $ uv_ip4_addr cstr (fromIntegral port) p
-- | Convert a string containing an IPv6 addresses to a binary structure
--
-- This is partial function, wrong address will throw 'InvalidArgument' exception.
ipv6:: HasCallStack => CBytes -> PortNumber -> SocketAddr
ipv6 str (PortNumber port) = unsafeDupablePerformIO . withSocketAddrStorageUnsafe $ \ p ->
withCBytes str $ \ cstr -> throwUVIfMinus_ $ uv_ip6_addr cstr (fromIntegral port) p
--------------------------------------------------------------------------------
-- | Independent of endianness. For example @127.0.0.1@ is stored as @(127, 0, 0, 1)@.
--
-- For direct manipulation prefer 'inetAddrToTuple' and 'tupleToInetAddr'.
--
newtype InetAddr = InetAddr { getInetAddr :: Word32 } deriving (Eq, Ord, Typeable)
instance Show InetAddr where
showsPrec _ ia =
let (a,b,c,d) = inetAddrToTuple ia
in shows a . ('.':) . shows b . ('.':) . shows c . ('.':) . shows d
-- | @0.0.0.0@
inetAny :: InetAddr
inetAny = InetAddr 0
-- | @255.255.255.255@
inetBroadcast :: InetAddr
inetBroadcast = tupleToInetAddr (255,255,255,255)
-- | @255.255.255.255@
inetNone :: InetAddr
inetNone = tupleToInetAddr (255,255,255,255)
-- | @127.0.0.1@
inetLoopback :: InetAddr
inetLoopback = tupleToInetAddr (127, 0, 0, 1)
-- | @224.0.0.0@
inetUnspecificGroup :: InetAddr
inetUnspecificGroup = tupleToInetAddr (224, 0, 0, 0)
-- | @224.0.0.1@
inetAllHostsGroup :: InetAddr
inetAllHostsGroup = tupleToInetAddr (224, 0, 0, 1)
-- | @224.0.0.255@
inetMaxLocalGroup :: InetAddr
inetMaxLocalGroup = tupleToInetAddr (224, 0, 0,255)
instance Storable InetAddr where
sizeOf _ = sizeOf (undefined :: Word32)
alignment _ = alignment (undefined :: Word32)
peek p = (InetAddr . ntohl) `fmap` peekByteOff p 0
poke p (InetAddr ia) = pokeByteOff p 0 (htonl ia)
instance UnalignedAccess InetAddr where
unalignedSize = UnalignedSize 4
pokeMBA p off x = pokeMBA p off (htonl (getInetAddr x))
peekMBA p off = InetAddr . ntohl <$> peekMBA p off
indexBA p off = InetAddr (ntohl (indexBA p off))
-- | Converts 'InetAddr' to representation-independent IPv4 quadruple.
-- For example for @127.0.0.1@ the function will return @(127, 0, 0, 1)@
-- regardless of host endianness.
inetAddrToTuple :: InetAddr -> (Word8, Word8, Word8, Word8)
inetAddrToTuple (InetAddr ia) =
let byte i = fromIntegral (ia `shiftR` i) :: Word8
in (byte 24, byte 16, byte 8, byte 0)
-- | Converts IPv4 quadruple to 'InetAddr'.
tupleToInetAddr :: (Word8, Word8, Word8, Word8) -> InetAddr
tupleToInetAddr (b3, b2, b1, b0) =
let x `sl` i = fromIntegral x `shiftL` i :: Word32
in InetAddr $ (b3 `sl` 24) .|. (b2 `sl` 16) .|. (b1 `sl` 8) .|. (b0 `sl` 0)
--------------------------------------------------------------------------------
-- | Independent of endianness. For example @::1@ is stored as @(0, 0, 0, 1)@.
--
-- For direct manipulation prefer 'inet6AddrToTuple' and 'tupleToInet6Addr'.
--
data Inet6Addr = Inet6Addr {-# UNPACK #-}!Word32
{-# UNPACK #-}!Word32
{-# UNPACK #-}!Word32
{-# UNPACK #-}!Word32 deriving (Eq, Ord, Typeable)
instance Show Inet6Addr where
showsPrec _ ia6@(Inet6Addr a1 a2 a3 a4)
-- IPv4-Mapped IPv6 Address
| a1 == 0 && a2 == 0 && a3 == 0xffff =
showString "::ffff:" . shows (InetAddr a4)
-- IPv4-Compatible IPv6 Address (exclude IPRange ::/112)
| a1 == 0 && a2 == 0 && a3 == 0 && a4 >= 0x10000 =
showString "::" . shows (InetAddr a4)
-- length of longest run > 1, replace it with "::"
| end - begin > 1 =
showFields prefix . showString "::" . showFields suffix
| otherwise =
showFields fields
where
fields =
let (u7, u6, u5, u4, u3, u2, u1, u0) = inet6AddrToTuple ia6 in
[u7, u6, u5, u4, u3, u2, u1, u0]
showFields = foldr (.) id . List.intersperse (':':) . map showHex
prefix = take begin fields -- fields before "::"
suffix = drop end fields -- fields after "::"
begin = end + diff -- the longest run of zeros
(diff, end) = minimum $
scanl (\c i -> if i == 0 then c - 1 else 0) 0 fields `zip` [0..]
-- | @::@
inet6Any :: Inet6Addr
inet6Any = Inet6Addr 0 0 0 0
-- | @::1@
inet6Loopback :: Inet6Addr
inet6Loopback = Inet6Addr 0 0 0 1
-- | convert 'Inet6Addr' to octets.
inet6AddrToTuple :: Inet6Addr -> (Word16, Word16, Word16, Word16,
Word16, Word16, Word16, Word16)
inet6AddrToTuple (Inet6Addr w3 w2 w1 w0) =
let high, low :: Word32 -> Word16
high w = fromIntegral (w `shiftR` 16)
low w = fromIntegral w
in (high w3, low w3, high w2, low w2, high w1, low w1, high w0, low w0)
-- | convert 'Inet6Addr' from octets.
tupleToInet6Addr :: (Word16, Word16, Word16, Word16,
Word16, Word16, Word16, Word16) -> Inet6Addr
tupleToInet6Addr (w7, w6, w5, w4, w3, w2, w1, w0) =
let add :: Word16 -> Word16 -> Word32
high `add` low = (fromIntegral high `shiftL` 16) .|. (fromIntegral low)
in Inet6Addr (w7 `add` w6) (w5 `add` w4) (w3 `add` w2) (w1 `add` w0)
instance Storable Inet6Addr where
sizeOf _ = #size struct in6_addr
alignment _ = #alignment struct in6_addr
peek p = do
a <- peek32 p 0
b <- peek32 p 1
c <- peek32 p 2
d <- peek32 p 3
return $ Inet6Addr a b c d
poke p (Inet6Addr a b c d) = do
poke32 p 0 a
poke32 p 1 b
poke32 p 2 c
poke32 p 3 d
s6_addr_offset :: Int
s6_addr_offset = (#offset struct in6_addr, s6_addr)
peek32 :: Ptr a -> Int -> IO Word32
peek32 p i0 = do
let i' = i0 * 4
peekByte n = peekByteOff p (s6_addr_offset + i' + n) :: IO Word8
a `sl` i = fromIntegral a `shiftL` i
a0 <- peekByte 0
a1 <- peekByte 1
a2 <- peekByte 2
a3 <- peekByte 3
return ((a0 `sl` 24) .|. (a1 `sl` 16) .|. (a2 `sl` 8) .|. (a3 `sl` 0))
poke32 :: Ptr a -> Int -> Word32 -> IO ()
poke32 p i0 a = do
let i' = i0 * 4
pokeByte n = pokeByteOff p (s6_addr_offset + i' + n)
x `sr` i = fromIntegral (x `shiftR` i) :: Word8
pokeByte 0 (a `sr` 24)
pokeByte 1 (a `sr` 16)
pokeByte 2 (a `sr` 8)
pokeByte 3 (a `sr` 0)
instance UnalignedAccess Inet6Addr where
unalignedSize = UnalignedSize (#size struct in6_addr)
indexBA p off =
let a = indexBA p (off + s6_addr_offset + 0)
b = indexBA p (off + s6_addr_offset + 4)
c = indexBA p (off + s6_addr_offset + 8)
d = indexBA p (off + s6_addr_offset + 12)
in Inet6Addr (getBE a) (getBE b) (getBE c) (getBE d)
peekMBA p off = do
a <- peekMBA p (off + s6_addr_offset + 0)
b <- peekMBA p (off + s6_addr_offset + 4)
c <- peekMBA p (off + s6_addr_offset + 8)
d <- peekMBA p (off + s6_addr_offset + 12)
return $ Inet6Addr (getBE a) (getBE b) (getBE c) (getBE d)
pokeMBA p off (Inet6Addr a b c d) = do
pokeMBA p (off + s6_addr_offset) (BE a)
pokeMBA p (off + 4 + s6_addr_offset) (BE b)
pokeMBA p (off + 8 + s6_addr_offset) (BE c)
pokeMBA p (off + 12 + s6_addr_offset) (BE d)
--------------------------------------------------------------------------------
peekSocketAddr :: HasCallStack => Ptr SocketAddr -> IO SocketAddr
peekSocketAddr p = do
family <- (#peek struct sockaddr, sa_family) p
case family :: CSaFamily of
(#const AF_INET) -> do
addr <- (#peek struct sockaddr_in, sin_addr) p
port <- (#peek struct sockaddr_in, sin_port) p
return (SocketAddrInet port addr)
(#const AF_INET6) -> do
port <- (#peek struct sockaddr_in6, sin6_port) p
flow <- (#peek struct sockaddr_in6, sin6_flowinfo) p
addr <- (#peek struct sockaddr_in6, sin6_addr) p
scope <- (#peek struct sockaddr_in6, sin6_scope_id) p
return (SocketAddrInet6 port flow addr scope)
_ -> do let errno = UV_EAI_ADDRFAMILY
name <- uvErrName errno
desc <- uvStdError errno
throwUVError errno (IOEInfo name desc callStack)
pokeSocketAddr :: Ptr SocketAddr -> SocketAddr -> IO ()
pokeSocketAddr p (SocketAddrInet port addr) = do
#if defined(darwin_HOST_OS)
clearPtr p (#size struct sockaddr_in)
#endif
#if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
(#poke struct sockaddr_in, sin_len) p ((#size struct sockaddr_in) :: Word8)
#endif
(#poke struct sockaddr_in, sin_family) p ((#const AF_INET) :: CSaFamily)
(#poke struct sockaddr_in, sin_port) p port
(#poke struct sockaddr_in, sin_addr) p addr
pokeSocketAddr p (SocketAddrInet6 port flow addr scope) = do
#if defined(darwin_HOST_OS)
clearPtr p (#size struct sockaddr_in6)
#endif
#if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
(#poke struct sockaddr_in6, sin6_len) p ((#size struct sockaddr_in6) :: Word8)
#endif
(#poke struct sockaddr_in6, sin6_family) p ((#const AF_INET6) :: CSaFamily)
(#poke struct sockaddr_in6, sin6_port) p port
(#poke struct sockaddr_in6, sin6_flowinfo) p flow
(#poke struct sockaddr_in6, sin6_addr) p (addr)
(#poke struct sockaddr_in6, sin6_scope_id) p scope
-- | Pass 'SocketAddr' to FFI as pointer.
--
withSocketAddr :: SocketAddr -> (Ptr SocketAddr -> IO a) -> IO a
withSocketAddr sa@(SocketAddrInet _ _) f = do
allocaBytesAligned
(#size struct sockaddr_in)
(#alignment struct sockaddr_in) $ \ p -> pokeSocketAddr p sa >> f p
withSocketAddr sa@(SocketAddrInet6 _ _ _ _) f = do
allocaBytesAligned
(#size struct sockaddr_in6)
(#alignment struct sockaddr_in6) $ \ p -> pokeSocketAddr p sa >> f p
-- | Pass 'SocketAddr' to FFI as pointer.
--
-- USE THIS FUNCTION WITH UNSAFE FFI CALL ONLY.
--
withSocketAddrUnsafe :: SocketAddr -> (MBA## SocketAddr -> IO a) -> IO a
withSocketAddrUnsafe sa@(SocketAddrInet _ _) f = do
allocMutableByteArrayUnsafe (#size struct sockaddr_in) $ \ p ->
pokeSocketAddrMBA p sa >> f p
withSocketAddrUnsafe sa@(SocketAddrInet6 _ _ _ _) f = do
allocMutableByteArrayUnsafe (#size struct sockaddr_in6) $ \ p ->
pokeSocketAddrMBA p sa >> f p
sizeOfSocketAddr :: SocketAddr -> CSize
sizeOfSocketAddr (SocketAddrInet _ _) = #size struct sockaddr_in
sizeOfSocketAddr (SocketAddrInet6 _ _ _ _) = #size struct sockaddr_in6
-- | Allocate space for 'sockaddr_storage' and pass to FFI.
withSocketAddrStorage :: (Ptr SocketAddr -> IO ()) -> IO SocketAddr
withSocketAddrStorage f = do
allocaBytesAligned
(#size struct sockaddr_storage)
(#alignment struct sockaddr_storage) $ \ p -> f p >> peekSocketAddr p
-- | Allocate space for 'sockaddr_storage' and pass to FFI.
--
-- USE THIS FUNCTION WITH UNSAFE FFI CALL ONLY.
--
withSocketAddrStorageUnsafe :: (MBA## SocketAddr -> IO ()) -> IO SocketAddr
withSocketAddrStorageUnsafe f = do
allocMutableByteArrayUnsafe (#size struct sockaddr_storage) $ \ p ->
f p >> peekSocketAddrMBA p
sizeOfSocketAddrStorage :: CSize
sizeOfSocketAddrStorage = (#size struct sockaddr_storage)
peekSocketAddrMBA :: HasCallStack => MBA## SocketAddr -> IO SocketAddr
peekSocketAddrMBA p = do
family <- peekMBA p (#offset struct sockaddr, sa_family)
case family :: CSaFamily of
(#const AF_INET) -> do
addr <- peekMBA p (#offset struct sockaddr_in, sin_addr)
port <- peekMBA p (#offset struct sockaddr_in, sin_port)
return (SocketAddrInet port addr)
(#const AF_INET6) -> do
port <- peekMBA p (#offset struct sockaddr_in6, sin6_port)
flow <- peekMBA p (#offset struct sockaddr_in6, sin6_flowinfo)
addr <- peekMBA p (#offset struct sockaddr_in6, sin6_addr)
scope <- peekMBA p (#offset struct sockaddr_in6, sin6_scope_id)
return (SocketAddrInet6 port flow addr scope)
_ -> do let errno = UV_EAI_ADDRFAMILY
name <- uvErrName errno
desc <- uvStdError errno
throwUVError errno (IOEInfo name desc callStack)
pokeSocketAddrMBA :: MBA## SocketAddr -> SocketAddr -> IO ()
pokeSocketAddrMBA p (SocketAddrInet port addr) = do
#if defined(darwin_HOST_OS)
clearMBA p (#size struct sockaddr_in)
#endif
#if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
pokeMBA p (#offset struct sockaddr_in, sin_len) ((#size struct sockaddr_in) :: Word8)
#endif
pokeMBA p (#offset struct sockaddr_in, sin_family) ((#const AF_INET) :: CSaFamily)
pokeMBA p (#offset struct sockaddr_in, sin_port) port
pokeMBA p (#offset struct sockaddr_in, sin_addr) addr
pokeSocketAddrMBA p (SocketAddrInet6 port flow addr scope) = do
#if defined(darwin_HOST_OS)
clearMBA p (#size struct sockaddr_in6)
#endif
#if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
pokeMBA p (#offset struct sockaddr_in6, sin6_len) ((#size struct sockaddr_in6) :: Word8)
#endif
pokeMBA p (#offset struct sockaddr_in6, sin6_family) ((#const AF_INET6) :: CSaFamily)
pokeMBA p (#offset struct sockaddr_in6, sin6_port) port
pokeMBA p (#offset struct sockaddr_in6, sin6_flowinfo) flow
pokeMBA p (#offset struct sockaddr_in6, sin6_addr) (addr)
pokeMBA p (#offset struct sockaddr_in6, sin6_scope_id) scope
--------------------------------------------------------------------------------
-- Port Numbers
-- | Port number.
-- Use the @Num@ instance (i.e. use a literal) to create a
-- @PortNumber@ value.
--
-- >>> 1 :: PortNumber
-- 1
-- >>> read "1" :: PortNumber
-- 1
-- >>> show (12345 :: PortNumber)
-- "12345"
-- >>> 50000 < (51000 :: PortNumber)
-- True
-- >>> 50000 < (52000 :: PortNumber)
-- True
-- >>> 50000 + (10000 :: PortNumber)
-- 60000
newtype PortNumber = PortNumber Word16 deriving (Eq, Ord, Num, Enum, Bounded, Real, Integral)
-- | @:0@
portAny :: PortNumber
portAny = PortNumber 0
-- Print "n" instead of "PortNum n".
instance Show PortNumber where
showsPrec p (PortNumber pn) = showsPrec p pn
-- Read "n" instead of "PortNum n".
instance Read PortNumber where
readPrec = PortNumber <$> readPrec
instance Storable PortNumber where
sizeOf _ = sizeOf (0 :: Word16)
alignment _ = alignment (0 :: Word16)
poke p (PortNumber po) = poke (castPtr p) (htons po)
peek p = PortNumber . ntohs <$> peek (castPtr p)
instance UnalignedAccess PortNumber where
unalignedSize = UnalignedSize 2
indexBA p off = PortNumber . ntohs $ indexBA p off
pokeMBA p off (PortNumber po) = pokeMBA p off (htons po)
peekMBA p off = PortNumber . ntohs <$> peekMBA p off
--------------------------------------------------------------------------------
newtype SocketFamily = SocketFamily CInt
deriving (Eq, Ord, Read, Show, Typeable)
newtype SocketType = SocketType CInt
deriving (Eq, Ord, Read, Show, Typeable)
newtype ProtocolNumber = ProtocolNumber CInt
deriving (Eq, Ord, Read, Show, Typeable)
instance Storable SocketFamily where
sizeOf _ = sizeOf (undefined :: CInt)
alignment _ = alignment (undefined :: CInt)
peek ptr = SocketFamily `fmap` peek (castPtr ptr)
poke ptr (SocketFamily v) = poke (castPtr ptr) v
instance Storable SocketType where
sizeOf _ = sizeOf (undefined :: CInt)
alignment _ = alignment (undefined :: CInt)
peek ptr = SocketType `fmap` peek (castPtr ptr)
poke ptr (SocketType v) = poke (castPtr ptr) v
instance Storable ProtocolNumber where
sizeOf _ = sizeOf (undefined :: CInt)
alignment _ = alignment (undefined :: CInt)
peek ptr = ProtocolNumber `fmap` peek (castPtr ptr)
poke ptr (ProtocolNumber v) = poke (castPtr ptr) v
-- | unspecified
pattern AF_UNSPEC :: SocketFamily
pattern AF_UNSPEC = SocketFamily (#const AF_UNSPEC)
-- | internetwork: UDP, TCP, etc
pattern AF_INET :: SocketFamily
pattern AF_INET = SocketFamily (#const AF_INET)
-- | Internet Protocol version 6
pattern AF_INET6 :: SocketFamily
pattern AF_INET6 = SocketFamily (#const AF_INET6)
pattern SOCK_STREAM :: SocketType
pattern SOCK_STREAM = SocketType (#const SOCK_STREAM)
pattern SOCK_DGRAM :: SocketType
pattern SOCK_DGRAM = SocketType (#const SOCK_DGRAM)
pattern SOCK_RAW :: SocketType
pattern SOCK_RAW = SocketType (#const SOCK_RAW)
pattern SOCK_RDM :: SocketType
pattern SOCK_RDM = SocketType (#const SOCK_RDM)
pattern SOCK_SEQPACKET :: SocketType
pattern SOCK_SEQPACKET = SocketType (#const SOCK_SEQPACKET)
-- | Used in getAddrInfo hints, for any type can be returned by getAddrInfo
pattern SOCK_ANY :: SocketType
pattern SOCK_ANY = SocketType 0
pattern IPPROTO_DEFAULT :: ProtocolNumber
pattern IPPROTO_DEFAULT = ProtocolNumber 0
pattern IPPROTO_IP :: ProtocolNumber
pattern IPPROTO_IP = ProtocolNumber (#const IPPROTO_IP)
pattern IPPROTO_TCP :: ProtocolNumber
pattern IPPROTO_TCP = ProtocolNumber (#const IPPROTO_TCP)
pattern IPPROTO_UDP :: ProtocolNumber
pattern IPPROTO_UDP = ProtocolNumber (#const IPPROTO_UDP)
--------------------------------------------------------------------------------
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
foreign import ccall unsafe uv_ip4_addr :: CString -> CInt -> MBA## SocketAddr -> IO CInt
foreign import ccall unsafe uv_ip6_addr :: CString -> CInt -> MBA## SocketAddr -> IO CInt