module Net.Internal where
import Data.Monoid ((<>))
import Data.Word
import Data.Bits ((.&.),(.|.),shiftR,shiftL,complement)
import Control.Monad.ST
import Data.Text.Internal (Text(..))
import Data.ByteString (ByteString)
import Data.Text.Lazy.Builder.Int (decimal)
import qualified Data.Text.Lazy as LText
import qualified Data.Attoparsec.Text as AT
import qualified Data.Aeson.Types as Aeson
import qualified Data.Text.Array as TArray
import qualified Data.ByteString.Char8 as BC8
import qualified Data.ByteString as ByteString
import qualified Data.ByteString.Unsafe as ByteString
import qualified Data.Text.Lazy.Builder as TBuilder
import qualified Data.Text.Lazy.Builder.Int as TBuilder
attoparsecParseJSON :: AT.Parser a -> Aeson.Value -> Aeson.Parser a
attoparsecParseJSON p v =
case v of
Aeson.String t ->
case AT.parseOnly p t of
Left err -> fail err
Right res -> return res
_ -> fail "expected a String"
rightToMaybe :: Either a b -> Maybe b
rightToMaybe = either (const Nothing) Just
toDotDecimalText :: Word32 -> Text
toDotDecimalText = toTextPreAllocated
toDotDecimalBuilder :: Word32 -> TBuilder.Builder
toDotDecimalBuilder = TBuilder.fromText . toTextPreAllocated
rangeToDotDecimalText :: Word32 -> Word8 -> Text
rangeToDotDecimalText addr len =
LText.toStrict (TBuilder.toLazyText (rangeToDotDecimalBuilder addr len))
rangeToDotDecimalBuilder :: Word32 -> Word8 -> TBuilder.Builder
rangeToDotDecimalBuilder addr len =
toDotDecimalBuilder addr
<> TBuilder.singleton '/'
<> decimal len
toTextPreAllocated :: Word32 -> Text
toTextPreAllocated w =
let w1 = fromIntegral $ 255 .&. shiftR w 24
w2 = fromIntegral $ 255 .&. shiftR w 16
w3 = fromIntegral $ 255 .&. shiftR w 8
w4 = fromIntegral $ 255 .&. w
dot = 46
(arr,len) = runST $ do
marr <- TArray.new 15
i1 <- putAndCount 0 w1 marr
let n1 = i1
n1' = i1 + 1
TArray.unsafeWrite marr n1 dot
i2 <- putAndCount n1' w2 marr
let n2 = i2 + n1'
n2' = n2 + 1
TArray.unsafeWrite marr n2 dot
i3 <- putAndCount n2' w3 marr
let n3 = i3 + n2'
n3' = n3 + 1
TArray.unsafeWrite marr n3 dot
i4 <- putAndCount n3' w4 marr
theArr <- TArray.unsafeFreeze marr
return (theArr,i4 + n3')
in Text arr 0 len
putAndCount :: Int -> Word8 -> TArray.MArray s -> ST s Int
putAndCount pos w marr
| w < 10 = TArray.unsafeWrite marr pos (i2w w) >> return 1
| w < 100 = write2 pos w >> return 2
| otherwise = write3 pos w >> return 3
where
write2 off i0 = do
let i = fromIntegral i0; j = i + i
TArray.unsafeWrite marr off $ get2 j
TArray.unsafeWrite marr (off + 1) $ get2 (j + 1)
write3 off i0 = do
let i = fromIntegral i0; j = i + i + i
TArray.unsafeWrite marr off $ get3 j
TArray.unsafeWrite marr (off + 1) $ get3 (j + 1)
TArray.unsafeWrite marr (off + 2) $ get3 (j + 2)
get2 = fromIntegral . ByteString.unsafeIndex twoDigits
get3 = fromIntegral . ByteString.unsafeIndex threeDigits
zero :: Word16
zero = 48
i2w :: Integral a => a -> Word16
i2w v = zero + fromIntegral v
twoDigits :: ByteString
twoDigits = BC8.pack
"0001020304050607080910111213141516171819\
\2021222324252627282930313233343536373839\
\4041424344454647484950515253545556575859\
\6061626364656667686970717273747576777879\
\8081828384858687888990919293949596979899"
threeDigits :: ByteString
threeDigits =
ByteString.replicate 300 0 <> BC8.pack
"100101102103104105106107108109110111112\
\113114115116117118119120121122123124125\
\126127128129130131132133134135136137138\
\139140141142143144145146147148149150151\
\152153154155156157158159160161162163164\
\165166167168169170171172173174175176177\
\178179180181182183184185186187188189190\
\191192193194195196197198199200201202203\
\204205206207208209210211212213214215216\
\217218219220221222223224225226227228229\
\230231232233234235236237238239240241242\
\243244245246247248249250251252253254255"
fromDotDecimalText' :: Text -> Either String Word32
fromDotDecimalText' t =
AT.parseOnly (dotDecimalParser <* AT.endOfInput) t
fromDotDecimalText :: Text -> Maybe Word32
fromDotDecimalText = rightToMaybe . fromDotDecimalText'
rangeFromDotDecimalText' :: (Word32 -> Word8 -> a) -> Text -> Either String a
rangeFromDotDecimalText' f t =
AT.parseOnly (dotDecimalRangeParser f <* AT.endOfInput) t
rangeFromDotDecimalText :: (Word32 -> Word8 -> a) -> Text -> Maybe a
rangeFromDotDecimalText f = rightToMaybe . rangeFromDotDecimalText' f
dotDecimalRangeParser :: (Word32 -> Word8 -> a) -> AT.Parser a
dotDecimalRangeParser f = f
<$> dotDecimalParser
<* AT.char '/'
<*> (AT.decimal >>= limitSize)
where
limitSize i =
if i > 32
then fail "An IP range length must be between 0 and 32"
else return i
dotDecimalParser :: AT.Parser Word32
dotDecimalParser = fromOctets'
<$> (AT.decimal >>= limitSize)
<* AT.char '.'
<*> (AT.decimal >>= limitSize)
<* AT.char '.'
<*> (AT.decimal >>= limitSize)
<* AT.char '.'
<*> (AT.decimal >>= limitSize)
where
limitSize i =
if i > 255
then fail "All octets in an ip address must be between 0 and 255"
else return i
fromOctets' :: Word32 -> Word32 -> Word32 -> Word32 -> Word32
fromOctets' a b c d =
( shiftL a 24
.|. shiftL b 16
.|. shiftL c 8
.|. d
)
mask :: Word8 -> Word32
mask = complement . shiftR 0xffffffff . fromIntegral
p24 :: Word32
p24 = fromOctets' 10 0 0 0
p20 :: Word32
p20 = fromOctets' 172 16 0 0
p16 :: Word32
p16 = fromOctets' 192 168 0 0
mask8,mask4,mask12,mask20,mask28,mask16,mask10,mask24,mask32,mask15 :: Word32
mask4 = 0xF0000000
mask8 = 0xFF000000
mask10 = 0xFFC00000
mask12 = 0xFFF00000
mask15 = 0xFFFE0000
mask16 = 0xFFFF0000
mask20 = 0xFFFFF000
mask24 = 0xFFFFFF00
mask28 = 0xFFFFFFF0
mask32 = 0xFFFFFFFF
macTextParser :: (Word16 -> Word16 -> Word32 -> Word32 -> Word32 -> Word32 -> a) -> AT.Parser a
macTextParser f = f
<$> (AT.hexadecimal >>= limitSize)
<* AT.char ':'
<*> (AT.hexadecimal >>= limitSize)
<* AT.char ':'
<*> (AT.hexadecimal >>= limitSize)
<* AT.char ':'
<*> (AT.hexadecimal >>= limitSize)
<* AT.char ':'
<*> (AT.hexadecimal >>= limitSize)
<* AT.char ':'
<*> (AT.hexadecimal >>= limitSize)
where
limitSize i =
if i > 255
then fail "All octets in a mac address must be between 00 and FF"
else return i
macToText :: Word16 -> Word32 -> Text
macToText a b = LText.toStrict (TBuilder.toLazyText (macToTextBuilder a b))
macToTextBuilder :: Word16 -> Word32 -> TBuilder.Builder
macToTextBuilder a b =
TBuilder.hexadecimal (255 .&. shiftR a 8 )
<> colon
<> TBuilder.hexadecimal (255 .&. a )
<> colon
<> TBuilder.hexadecimal (255 .&. shiftR b 24 )
<> colon
<> TBuilder.hexadecimal (255 .&. shiftR b 16 )
<> colon
<> TBuilder.hexadecimal (255 .&. shiftR b 8 )
<> colon
<> TBuilder.hexadecimal (255 .&. b)
where colon = TBuilder.singleton ':'
macFromText :: (Word16 -> Word16 -> Word32 -> Word32 -> Word32 -> Word32 -> a) -> Text -> Maybe a
macFromText f = rightToMaybe . macFromText' f
macFromText' :: (Word16 -> Word16 -> Word32 -> Word32 -> Word32 -> Word32 -> a) -> Text -> Either String a
macFromText' f = AT.parseOnly (macTextParser f <* AT.endOfInput)