{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE PatternSynonyms #-}

module Network.QUIC.Parameters (
    Parameters(..)
  , defaultParameters
  , baseParameters -- only for Connection
  , encodeParameters
  , decodeParameters
  , AuthCIDs(..)
  , defaultAuthCIDs
  , setCIDsToParameters
  , getCIDsToParameters
  ) where

import qualified Data.ByteString as BS
import qualified Data.ByteString.Short as Short
import System.IO.Unsafe (unsafeDupablePerformIO)

import Network.QUIC.Imports
import Network.QUIC.Types

encodeParameters :: Parameters -> ByteString
encodeParameters :: Parameters -> Value
encodeParameters = ParameterList -> Value
encodeParameterList forall b c a. (b -> c) -> (a -> b) -> a -> c
. Parameters -> ParameterList
toParameterList

decodeParameters :: ByteString -> Maybe Parameters
decodeParameters :: Value -> Maybe Parameters
decodeParameters Value
bs = ParameterList -> Parameters
fromParameterList forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Value -> Maybe ParameterList
decodeParameterList Value
bs

newtype Key = Key Word32 deriving (Key -> Key -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Key -> Key -> Bool
$c/= :: Key -> Key -> Bool
== :: Key -> Key -> Bool
$c== :: Key -> Key -> Bool
Eq, Int -> Key -> ShowS
[Key] -> ShowS
Key -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Key] -> ShowS
$cshowList :: [Key] -> ShowS
show :: Key -> String
$cshow :: Key -> String
showsPrec :: Int -> Key -> ShowS
$cshowsPrec :: Int -> Key -> ShowS
Show)
type Value = ByteString

type ParameterList = [(Key,Value)]

pattern OriginalDestinationConnectionId :: Key
pattern $bOriginalDestinationConnectionId :: Key
$mOriginalDestinationConnectionId :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
OriginalDestinationConnectionId  = Key 0x00
pattern MaxIdleTimeout                  :: Key
pattern $bMaxIdleTimeout :: Key
$mMaxIdleTimeout :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
MaxIdleTimeout                   = Key 0x01
pattern StateLessResetToken             :: Key
pattern $bStateLessResetToken :: Key
$mStateLessResetToken :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
StateLessResetToken              = Key 0x02
pattern MaxUdpPayloadSize               :: Key
pattern $bMaxUdpPayloadSize :: Key
$mMaxUdpPayloadSize :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
MaxUdpPayloadSize                = Key 0x03
pattern InitialMaxData                  :: Key
pattern $bInitialMaxData :: Key
$mInitialMaxData :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
InitialMaxData                   = Key 0x04
pattern InitialMaxStreamDataBidiLocal   :: Key
pattern $bInitialMaxStreamDataBidiLocal :: Key
$mInitialMaxStreamDataBidiLocal :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
InitialMaxStreamDataBidiLocal    = Key 0x05
pattern InitialMaxStreamDataBidiRemote  :: Key
pattern $bInitialMaxStreamDataBidiRemote :: Key
$mInitialMaxStreamDataBidiRemote :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
InitialMaxStreamDataBidiRemote   = Key 0x06
pattern InitialMaxStreamDataUni         :: Key
pattern $bInitialMaxStreamDataUni :: Key
$mInitialMaxStreamDataUni :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
InitialMaxStreamDataUni          = Key 0x07
pattern InitialMaxStreamsBidi           :: Key
pattern $bInitialMaxStreamsBidi :: Key
$mInitialMaxStreamsBidi :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
InitialMaxStreamsBidi            = Key 0x08
pattern InitialMaxStreamsUni            :: Key
pattern $bInitialMaxStreamsUni :: Key
$mInitialMaxStreamsUni :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
InitialMaxStreamsUni             = Key 0x09
pattern AckDelayExponent                :: Key
pattern $bAckDelayExponent :: Key
$mAckDelayExponent :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
AckDelayExponent                 = Key 0x0a
pattern MaxAckDelay                     :: Key
pattern $bMaxAckDelay :: Key
$mMaxAckDelay :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
MaxAckDelay                      = Key 0x0b
pattern DisableActiveMigration          :: Key
pattern $bDisableActiveMigration :: Key
$mDisableActiveMigration :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
DisableActiveMigration           = Key 0x0c
pattern PreferredAddress                :: Key
pattern $bPreferredAddress :: Key
$mPreferredAddress :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
PreferredAddress                 = Key 0x0d
pattern ActiveConnectionIdLimit         :: Key
pattern $bActiveConnectionIdLimit :: Key
$mActiveConnectionIdLimit :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
ActiveConnectionIdLimit          = Key 0x0e
pattern InitialSourceConnectionId       :: Key
pattern $bInitialSourceConnectionId :: Key
$mInitialSourceConnectionId :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
InitialSourceConnectionId        = Key 0x0f
pattern RetrySourceConnectionId         :: Key
pattern $bRetrySourceConnectionId :: Key
$mRetrySourceConnectionId :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
RetrySourceConnectionId          = Key 0x10
pattern VersionInformation              :: Key
pattern $bVersionInformation :: Key
$mVersionInformation :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
VersionInformation               = Key 0x11
pattern Grease                          :: Key
pattern $bGrease :: Key
$mGrease :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
Grease                           = Key 0xff
pattern GreaseQuicBit                   :: Key
pattern $bGreaseQuicBit :: Key
$mGreaseQuicBit :: forall {r}. Key -> ((# #) -> r) -> ((# #) -> r) -> r
GreaseQuicBit                    = Key 0x2ab2


-- | QUIC transport parameters.
data Parameters = Parameters {
    Parameters -> Maybe CID
originalDestinationConnectionId :: Maybe CID
  , Parameters -> Milliseconds
maxIdleTimeout                  :: Milliseconds
  , Parameters -> Maybe StatelessResetToken
statelessResetToken             :: Maybe StatelessResetToken -- 16 bytes
  , Parameters -> Int
maxUdpPayloadSize               :: Int
  , Parameters -> Int
initialMaxData                  :: Int
  , Parameters -> Int
initialMaxStreamDataBidiLocal   :: Int
  , Parameters -> Int
initialMaxStreamDataBidiRemote  :: Int
  , Parameters -> Int
initialMaxStreamDataUni         :: Int
  , Parameters -> Int
initialMaxStreamsBidi           :: Int
  , Parameters -> Int
initialMaxStreamsUni            :: Int
  , Parameters -> Int
ackDelayExponent                :: Int
  , Parameters -> Milliseconds
maxAckDelay                     :: Milliseconds
  , Parameters -> Bool
disableActiveMigration          :: Bool
  , Parameters -> Maybe Value
preferredAddress                :: Maybe ByteString -- fixme
  , Parameters -> Int
activeConnectionIdLimit         :: Int
  , Parameters -> Maybe CID
initialSourceConnectionId       :: Maybe CID
  , Parameters -> Maybe CID
retrySourceConnectionId         :: Maybe CID
  , Parameters -> Maybe Value
grease                          :: Maybe ByteString
  , Parameters -> Bool
greaseQuicBit                   :: Bool
  , Parameters -> Maybe VersionInfo
versionInformation              :: Maybe VersionInfo
  } deriving (Parameters -> Parameters -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Parameters -> Parameters -> Bool
$c/= :: Parameters -> Parameters -> Bool
== :: Parameters -> Parameters -> Bool
$c== :: Parameters -> Parameters -> Bool
Eq,Int -> Parameters -> ShowS
[Parameters] -> ShowS
Parameters -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Parameters] -> ShowS
$cshowList :: [Parameters] -> ShowS
show :: Parameters -> String
$cshow :: Parameters -> String
showsPrec :: Int -> Parameters -> ShowS
$cshowsPrec :: Int -> Parameters -> ShowS
Show)

-- | The default value for QUIC transport parameters.
baseParameters :: Parameters
baseParameters :: Parameters
baseParameters = Parameters {
    originalDestinationConnectionId :: Maybe CID
originalDestinationConnectionId    = forall a. Maybe a
Nothing
  , maxIdleTimeout :: Milliseconds
maxIdleTimeout                     = Int64 -> Milliseconds
Milliseconds Int64
0 -- disabled
  , statelessResetToken :: Maybe StatelessResetToken
statelessResetToken                = forall a. Maybe a
Nothing
  , maxUdpPayloadSize :: Int
maxUdpPayloadSize                  = Int
65527
  , initialMaxData :: Int
initialMaxData                     = Int
0
  , initialMaxStreamDataBidiLocal :: Int
initialMaxStreamDataBidiLocal      = Int
0
  , initialMaxStreamDataBidiRemote :: Int
initialMaxStreamDataBidiRemote     = Int
0
  , initialMaxStreamDataUni :: Int
initialMaxStreamDataUni            = Int
0
  , initialMaxStreamsBidi :: Int
initialMaxStreamsBidi              = Int
0
  , initialMaxStreamsUni :: Int
initialMaxStreamsUni               = Int
0
  , ackDelayExponent :: Int
ackDelayExponent                   = Int
3
  , maxAckDelay :: Milliseconds
maxAckDelay                        = Int64 -> Milliseconds
Milliseconds Int64
25
  , disableActiveMigration :: Bool
disableActiveMigration             = Bool
False
  , preferredAddress :: Maybe Value
preferredAddress                   = forall a. Maybe a
Nothing
  , activeConnectionIdLimit :: Int
activeConnectionIdLimit            = Int
2
  , initialSourceConnectionId :: Maybe CID
initialSourceConnectionId          = forall a. Maybe a
Nothing
  , retrySourceConnectionId :: Maybe CID
retrySourceConnectionId            = forall a. Maybe a
Nothing
  , grease :: Maybe Value
grease                             = forall a. Maybe a
Nothing
  , greaseQuicBit :: Bool
greaseQuicBit                      = Bool
False
  , versionInformation :: Maybe VersionInfo
versionInformation                 = forall a. Maybe a
Nothing
  }

decInt :: ByteString -> Int
decInt :: Value -> Int
decInt = forall a b. (Integral a, Num b) => a -> b
fromIntegral forall b c a. (b -> c) -> (a -> b) -> a -> c
. Value -> Int64
decodeInt

encInt :: Int -> ByteString
encInt :: Int -> Value
encInt = Int64 -> Value
encodeInt forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a b. (Integral a, Num b) => a -> b
fromIntegral

decMilliseconds :: ByteString -> Milliseconds
decMilliseconds :: Value -> Milliseconds
decMilliseconds = Int64 -> Milliseconds
Milliseconds forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a b. (Integral a, Num b) => a -> b
fromIntegral forall b c a. (b -> c) -> (a -> b) -> a -> c
. Value -> Int64
decodeInt

encMilliseconds :: Milliseconds -> ByteString
encMilliseconds :: Milliseconds -> Value
encMilliseconds (Milliseconds Int64
n) = Int64 -> Value
encodeInt forall a b. (a -> b) -> a -> b
$ forall a b. (Integral a, Num b) => a -> b
fromIntegral Int64
n

fromVersionInfo :: Maybe VersionInfo -> Value
fromVersionInfo :: Maybe VersionInfo -> Value
fromVersionInfo Maybe VersionInfo
Nothing                = Value
"" -- never reach
fromVersionInfo (Just VersionInfo{[Version]
Version
otherVersions :: VersionInfo -> [Version]
chosenVersion :: VersionInfo -> Version
otherVersions :: [Version]
chosenVersion :: Version
..}) = forall a. IO a -> a
unsafeDupablePerformIO forall a b. (a -> b) -> a -> b
$
    Int -> (WriteBuffer -> IO ()) -> IO Value
withWriteBuffer Int
len forall a b. (a -> b) -> a -> b
$ \WriteBuffer
wbuf -> do
        let putVersion :: Version -> IO ()
putVersion (Version Word32
ver) = WriteBuffer -> Word32 -> IO ()
write32 WriteBuffer
wbuf Word32
ver
        Version -> IO ()
putVersion Version
chosenVersion
        forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ Version -> IO ()
putVersion [Version]
otherVersions
  where
    len :: Int
len = Int
4 forall a. Num a => a -> a -> a
* (forall (t :: * -> *) a. Foldable t => t a -> Int
length [Version]
otherVersions forall a. Num a => a -> a -> a
+ Int
1)

toVersionInfo :: Value -> Maybe VersionInfo
toVersionInfo :: Value -> Maybe VersionInfo
toVersionInfo Value
bs
  | Int
len forall a. Ord a => a -> a -> Bool
< Int
3 Bool -> Bool -> Bool
|| Int
remainder forall a. Eq a => a -> a -> Bool
/= Int
0   = forall a. a -> Maybe a
Just VersionInfo
brokenVersionInfo
  | Bool
otherwise                   = forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall a. IO a -> a
unsafeDupablePerformIO forall a b. (a -> b) -> a -> b
$
    forall a. Value -> (ReadBuffer -> IO a) -> IO a
withReadBuffer Value
bs forall a b. (a -> b) -> a -> b
$ \ReadBuffer
rbuf -> do
        let getVersion :: IO Version
getVersion = Word32 -> Version
Version forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall a. Readable a => a -> IO Word32
read32 ReadBuffer
rbuf
        Version -> [Version] -> VersionInfo
VersionInfo forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> IO Version
getVersion forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (m :: * -> *) a. Applicative m => Int -> m a -> m [a]
replicateM (Int
cnt forall a. Num a => a -> a -> a
- Int
1) IO Version
getVersion
  where
    len :: Int
len = Value -> Int
BS.length Value
bs
    (Int
cnt,Int
remainder) = Int
len forall a. Integral a => a -> a -> (a, a)
`divMod` Int
4

fromParameterList :: ParameterList -> Parameters
fromParameterList :: ParameterList -> Parameters
fromParameterList ParameterList
kvs = forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' Parameters -> (Key, Value) -> Parameters
update Parameters
params ParameterList
kvs
  where
    params :: Parameters
params = Parameters
baseParameters
    update :: Parameters -> (Key, Value) -> Parameters
update Parameters
x (Key
OriginalDestinationConnectionId,Value
v)
        = Parameters
x { originalDestinationConnectionId :: Maybe CID
originalDestinationConnectionId = forall a. a -> Maybe a
Just (Value -> CID
toCID Value
v) }
    update Parameters
x (Key
MaxIdleTimeout,Value
v)
        = Parameters
x { maxIdleTimeout :: Milliseconds
maxIdleTimeout = Value -> Milliseconds
decMilliseconds Value
v }
    update Parameters
x (Key
StateLessResetToken,Value
v)
        = Parameters
x { statelessResetToken :: Maybe StatelessResetToken
statelessResetToken = forall a. a -> Maybe a
Just (Bytes -> StatelessResetToken
StatelessResetToken forall a b. (a -> b) -> a -> b
$ Value -> Bytes
Short.toShort Value
v) }
    update Parameters
x (Key
MaxUdpPayloadSize,Value
v)
        = Parameters
x { maxUdpPayloadSize :: Int
maxUdpPayloadSize = Value -> Int
decInt Value
v }
    update Parameters
x (Key
InitialMaxData,Value
v)
        = Parameters
x { initialMaxData :: Int
initialMaxData = Value -> Int
decInt Value
v }
    update Parameters
x (Key
InitialMaxStreamDataBidiLocal,Value
v)
        = Parameters
x { initialMaxStreamDataBidiLocal :: Int
initialMaxStreamDataBidiLocal = Value -> Int
decInt Value
v }
    update Parameters
x (Key
InitialMaxStreamDataBidiRemote,Value
v)
        = Parameters
x { initialMaxStreamDataBidiRemote :: Int
initialMaxStreamDataBidiRemote = Value -> Int
decInt Value
v }
    update Parameters
x (Key
InitialMaxStreamDataUni,Value
v)
        = Parameters
x { initialMaxStreamDataUni :: Int
initialMaxStreamDataUni = Value -> Int
decInt Value
v }
    update Parameters
x (Key
InitialMaxStreamsBidi,Value
v)
        = Parameters
x { initialMaxStreamsBidi :: Int
initialMaxStreamsBidi = Value -> Int
decInt Value
v }
    update Parameters
x (Key
InitialMaxStreamsUni,Value
v)
        = Parameters
x { initialMaxStreamsUni :: Int
initialMaxStreamsUni = Value -> Int
decInt Value
v }
    update Parameters
x (Key
AckDelayExponent,Value
v)
        = Parameters
x { ackDelayExponent :: Int
ackDelayExponent = Value -> Int
decInt Value
v }
    update Parameters
x (Key
MaxAckDelay,Value
v)
        = Parameters
x { maxAckDelay :: Milliseconds
maxAckDelay = Value -> Milliseconds
decMilliseconds Value
v }
    update Parameters
x (Key
DisableActiveMigration,Value
_)
        = Parameters
x { disableActiveMigration :: Bool
disableActiveMigration = Bool
True }
    update Parameters
x (Key
PreferredAddress,Value
v)
        = Parameters
x { preferredAddress :: Maybe Value
preferredAddress = forall a. a -> Maybe a
Just Value
v }
    update Parameters
x (Key
ActiveConnectionIdLimit,Value
v)
        = Parameters
x { activeConnectionIdLimit :: Int
activeConnectionIdLimit = Value -> Int
decInt Value
v }
    update Parameters
x (Key
InitialSourceConnectionId,Value
v)
        = Parameters
x { initialSourceConnectionId :: Maybe CID
initialSourceConnectionId = forall a. a -> Maybe a
Just (Value -> CID
toCID Value
v) }
    update Parameters
x (Key
RetrySourceConnectionId,Value
v)
        = Parameters
x { retrySourceConnectionId :: Maybe CID
retrySourceConnectionId = forall a. a -> Maybe a
Just (Value -> CID
toCID Value
v) }
    update Parameters
x (Key
Grease,Value
v)
        = Parameters
x { grease :: Maybe Value
grease = forall a. a -> Maybe a
Just Value
v }
    update Parameters
x (Key
GreaseQuicBit,Value
_)
        = Parameters
x { greaseQuicBit :: Bool
greaseQuicBit = Bool
True }
    update Parameters
x (Key
VersionInformation,Value
v)
        = Parameters
x { versionInformation :: Maybe VersionInfo
versionInformation = Value -> Maybe VersionInfo
toVersionInfo Value
v }
    update Parameters
x (Key, Value)
_ = Parameters
x

diff :: Eq a => Parameters -> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key,Value)
diff :: forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
params Parameters -> a
label Key
key a -> Value
enc
  | a
val forall a. Eq a => a -> a -> Bool
== a
val0 = forall a. Maybe a
Nothing
  | Bool
otherwise   = forall a. a -> Maybe a
Just (Key
key, a -> Value
enc a
val)
  where
    val :: a
val = Parameters -> a
label Parameters
params
    val0 :: a
val0 = Parameters -> a
label Parameters
baseParameters

toParameterList :: Parameters -> ParameterList
toParameterList :: Parameters -> ParameterList
toParameterList Parameters
p = forall a. [Maybe a] -> [a]
catMaybes [
    forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Maybe CID
originalDestinationConnectionId
         Key
OriginalDestinationConnectionId    (CID -> Value
fromCID forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. HasCallStack => Maybe a -> a
fromJust)
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Milliseconds
maxIdleTimeout          Key
MaxIdleTimeout          Milliseconds -> Value
encMilliseconds
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Maybe StatelessResetToken
statelessResetToken     Key
StateLessResetToken     Maybe StatelessResetToken -> Value
encSRT
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
maxUdpPayloadSize       Key
MaxUdpPayloadSize       Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
initialMaxData          Key
InitialMaxData          Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
initialMaxStreamDataBidiLocal  Key
InitialMaxStreamDataBidiLocal  Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
initialMaxStreamDataBidiRemote Key
InitialMaxStreamDataBidiRemote Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
initialMaxStreamDataUni Key
InitialMaxStreamDataUni Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
initialMaxStreamsBidi   Key
InitialMaxStreamsBidi   Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
initialMaxStreamsUni    Key
InitialMaxStreamsUni    Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
ackDelayExponent        Key
AckDelayExponent        Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Milliseconds
maxAckDelay             Key
MaxAckDelay             Milliseconds -> Value
encMilliseconds
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Bool
disableActiveMigration  Key
DisableActiveMigration  (forall a b. a -> b -> a
const Value
"")
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Maybe Value
preferredAddress        Key
PreferredAddress        forall a. HasCallStack => Maybe a -> a
fromJust
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Int
activeConnectionIdLimit Key
ActiveConnectionIdLimit Int -> Value
encInt
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Maybe CID
initialSourceConnectionId
         Key
InitialSourceConnectionId    (CID -> Value
fromCID forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. HasCallStack => Maybe a -> a
fromJust)
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Maybe CID
retrySourceConnectionId
         Key
RetrySourceConnectionId      (CID -> Value
fromCID forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. HasCallStack => Maybe a -> a
fromJust)
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Bool
greaseQuicBit           Key
GreaseQuicBit           (forall a b. a -> b -> a
const Value
"")
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Maybe Value
grease                  Key
Grease                  forall a. HasCallStack => Maybe a -> a
fromJust
  , forall a.
Eq a =>
Parameters
-> (Parameters -> a) -> Key -> (a -> Value) -> Maybe (Key, Value)
diff Parameters
p Parameters -> Maybe VersionInfo
versionInformation      Key
VersionInformation      Maybe VersionInfo -> Value
fromVersionInfo
  ]

encSRT :: Maybe StatelessResetToken -> ByteString
encSRT :: Maybe StatelessResetToken -> Value
encSRT (Just (StatelessResetToken Bytes
srt)) = Bytes -> Value
Short.fromShort Bytes
srt
encSRT Maybe StatelessResetToken
_ = forall a. HasCallStack => String -> a
error String
"encSRT"

encodeParameterList :: ParameterList -> ByteString
encodeParameterList :: ParameterList -> Value
encodeParameterList ParameterList
kvs = forall a. IO a -> a
unsafeDupablePerformIO forall a b. (a -> b) -> a -> b
$
    Int -> (WriteBuffer -> IO ()) -> IO Value
withWriteBuffer Int
4096 forall a b. (a -> b) -> a -> b
$ \WriteBuffer
wbuf -> do -- for grease
        forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ (WriteBuffer -> (Key, Value) -> IO ()
put WriteBuffer
wbuf) ParameterList
kvs
  where
    put :: WriteBuffer -> (Key, Value) -> IO ()
put WriteBuffer
wbuf (Key Word32
k,Value
v) = do
        WriteBuffer -> Int64 -> IO ()
encodeInt' WriteBuffer
wbuf forall a b. (a -> b) -> a -> b
$ forall a b. (Integral a, Num b) => a -> b
fromIntegral Word32
k
        WriteBuffer -> Int64 -> IO ()
encodeInt' WriteBuffer
wbuf forall a b. (a -> b) -> a -> b
$ forall a b. (Integral a, Num b) => a -> b
fromIntegral forall a b. (a -> b) -> a -> b
$ Value -> Int
BS.length Value
v
        WriteBuffer -> Value -> IO ()
copyByteString WriteBuffer
wbuf Value
v

decodeParameterList :: ByteString -> Maybe ParameterList
decodeParameterList :: Value -> Maybe ParameterList
decodeParameterList Value
bs = forall a. IO a -> a
unsafeDupablePerformIO forall a b. (a -> b) -> a -> b
$ forall a. Value -> (ReadBuffer -> IO a) -> IO a
withReadBuffer Value
bs (forall {c}. ReadBuffer -> (ParameterList -> c) -> IO (Maybe c)
`go` forall a. a -> a
id)
  where
    go :: ReadBuffer -> (ParameterList -> c) -> IO (Maybe c)
go ReadBuffer
rbuf ParameterList -> c
build = do
       Int
rest1 <- forall a. Readable a => a -> IO Int
remainingSize ReadBuffer
rbuf
       if Int
rest1 forall a. Eq a => a -> a -> Bool
== Int
0 then
          forall (m :: * -> *) a. Monad m => a -> m a
return forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just (ParameterList -> c
build [])
       else do
          Word32
key <- forall a b. (Integral a, Num b) => a -> b
fromIntegral forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ReadBuffer -> IO Int64
decodeInt' ReadBuffer
rbuf
          Int
len <- forall a b. (Integral a, Num b) => a -> b
fromIntegral forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ReadBuffer -> IO Int64
decodeInt' ReadBuffer
rbuf
          Value
val <- forall a. Readable a => a -> Int -> IO Value
extractByteString ReadBuffer
rbuf Int
len
          ReadBuffer -> (ParameterList -> c) -> IO (Maybe c)
go ReadBuffer
rbuf (ParameterList -> c
build forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((Word32 -> Key
Key Word32
key,Value
val)forall a. a -> [a] -> [a]
:))

-- | An example parameters obsoleted in the near future.
defaultParameters :: Parameters
defaultParameters :: Parameters
defaultParameters = Parameters
baseParameters {
    maxIdleTimeout :: Milliseconds
maxIdleTimeout                 = Microseconds -> Milliseconds
microToMilli Microseconds
idleTimeout -- 30000
  , maxUdpPayloadSize :: Int
maxUdpPayloadSize              = Int
maximumUdpPayloadSize -- 2048
  , initialMaxData :: Int
initialMaxData                 = Int
1048576
  , initialMaxStreamDataBidiLocal :: Int
initialMaxStreamDataBidiLocal  =  Int
262144
  , initialMaxStreamDataBidiRemote :: Int
initialMaxStreamDataBidiRemote =  Int
262144
  , initialMaxStreamDataUni :: Int
initialMaxStreamDataUni        =  Int
262144
  , initialMaxStreamsBidi :: Int
initialMaxStreamsBidi          =     Int
100
  , initialMaxStreamsUni :: Int
initialMaxStreamsUni           =       Int
3
  , activeConnectionIdLimit :: Int
activeConnectionIdLimit        =       Int
3
  , greaseQuicBit :: Bool
greaseQuicBit                  = Bool
True
  }

data AuthCIDs = AuthCIDs {
    AuthCIDs -> Maybe CID
initSrcCID  :: Maybe CID
  , AuthCIDs -> Maybe CID
origDstCID  :: Maybe CID
  , AuthCIDs -> Maybe CID
retrySrcCID :: Maybe CID
  } deriving (AuthCIDs -> AuthCIDs -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: AuthCIDs -> AuthCIDs -> Bool
$c/= :: AuthCIDs -> AuthCIDs -> Bool
== :: AuthCIDs -> AuthCIDs -> Bool
$c== :: AuthCIDs -> AuthCIDs -> Bool
Eq, Int -> AuthCIDs -> ShowS
[AuthCIDs] -> ShowS
AuthCIDs -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [AuthCIDs] -> ShowS
$cshowList :: [AuthCIDs] -> ShowS
show :: AuthCIDs -> String
$cshow :: AuthCIDs -> String
showsPrec :: Int -> AuthCIDs -> ShowS
$cshowsPrec :: Int -> AuthCIDs -> ShowS
Show)

defaultAuthCIDs :: AuthCIDs
defaultAuthCIDs :: AuthCIDs
defaultAuthCIDs = Maybe CID -> Maybe CID -> Maybe CID -> AuthCIDs
AuthCIDs forall a. Maybe a
Nothing forall a. Maybe a
Nothing forall a. Maybe a
Nothing

setCIDsToParameters :: AuthCIDs -> Parameters -> Parameters
setCIDsToParameters :: AuthCIDs -> Parameters -> Parameters
setCIDsToParameters AuthCIDs{Maybe CID
retrySrcCID :: Maybe CID
origDstCID :: Maybe CID
initSrcCID :: Maybe CID
retrySrcCID :: AuthCIDs -> Maybe CID
origDstCID :: AuthCIDs -> Maybe CID
initSrcCID :: AuthCIDs -> Maybe CID
..} Parameters
params = Parameters
params {
    originalDestinationConnectionId :: Maybe CID
originalDestinationConnectionId = Maybe CID
origDstCID
  , initialSourceConnectionId :: Maybe CID
initialSourceConnectionId       = Maybe CID
initSrcCID
  , retrySourceConnectionId :: Maybe CID
retrySourceConnectionId         = Maybe CID
retrySrcCID
  }

getCIDsToParameters :: Parameters -> AuthCIDs
getCIDsToParameters :: Parameters -> AuthCIDs
getCIDsToParameters Parameters{Bool
Int
Maybe Value
Maybe StatelessResetToken
Maybe CID
Maybe VersionInfo
Milliseconds
versionInformation :: Maybe VersionInfo
greaseQuicBit :: Bool
grease :: Maybe Value
retrySourceConnectionId :: Maybe CID
initialSourceConnectionId :: Maybe CID
activeConnectionIdLimit :: Int
preferredAddress :: Maybe Value
disableActiveMigration :: Bool
maxAckDelay :: Milliseconds
ackDelayExponent :: Int
initialMaxStreamsUni :: Int
initialMaxStreamsBidi :: Int
initialMaxStreamDataUni :: Int
initialMaxStreamDataBidiRemote :: Int
initialMaxStreamDataBidiLocal :: Int
initialMaxData :: Int
maxUdpPayloadSize :: Int
statelessResetToken :: Maybe StatelessResetToken
maxIdleTimeout :: Milliseconds
originalDestinationConnectionId :: Maybe CID
versionInformation :: Parameters -> Maybe VersionInfo
greaseQuicBit :: Parameters -> Bool
grease :: Parameters -> Maybe Value
retrySourceConnectionId :: Parameters -> Maybe CID
initialSourceConnectionId :: Parameters -> Maybe CID
activeConnectionIdLimit :: Parameters -> Int
preferredAddress :: Parameters -> Maybe Value
disableActiveMigration :: Parameters -> Bool
maxAckDelay :: Parameters -> Milliseconds
ackDelayExponent :: Parameters -> Int
initialMaxStreamsUni :: Parameters -> Int
initialMaxStreamsBidi :: Parameters -> Int
initialMaxStreamDataUni :: Parameters -> Int
initialMaxStreamDataBidiRemote :: Parameters -> Int
initialMaxStreamDataBidiLocal :: Parameters -> Int
initialMaxData :: Parameters -> Int
maxUdpPayloadSize :: Parameters -> Int
statelessResetToken :: Parameters -> Maybe StatelessResetToken
maxIdleTimeout :: Parameters -> Milliseconds
originalDestinationConnectionId :: Parameters -> Maybe CID
..} = AuthCIDs {
    origDstCID :: Maybe CID
origDstCID  = Maybe CID
originalDestinationConnectionId
  , initSrcCID :: Maybe CID
initSrcCID  = Maybe CID
initialSourceConnectionId
  , retrySrcCID :: Maybe CID
retrySrcCID = Maybe CID
retrySourceConnectionId
  }