{-# LANGUAGE OverloadedStrings #-}
module NmcDom ( NmcDom(..)
- , emptyNmcDom
- , seedNmcDom
- , descendNmcDom
+ , NmcRRSrv(..)
+ , NmcRRI2p(..)
+ , NmcRRTlsa(..)
+ , NmcRRDs(..)
+ , merge
) where
import Prelude hiding (length)
-import Data.ByteString.Lazy (ByteString)
-import qualified Data.Text as T (unpack)
-import Data.List.Split
+import Control.Applicative ((<$>), (<*>), liftA2, empty, pure)
import Data.Char
-import Data.Map as M (Map, lookup, delete, size)
-import Data.Vector (toList,(!),length)
-import Control.Applicative ((<$>), (<*>), empty)
+import Data.Text (Text, unpack)
+import Data.List (union)
+import Data.List.Split
+import Data.Vector ((!), length)
+import qualified Data.Vector as V (singleton)
+import Data.Map (Map, unionWith, foldrWithKey)
+import qualified Data.Map as M (singleton, empty, insert, insertWith)
+import qualified Data.HashMap.Strict as H (lookup, foldrWithKey)
import Data.Aeson
+import Data.Aeson.Types
+import Data.Default.Class
+
+-- Variant of Aeson's `.:?` that interprets a String as a
+-- single-element list, so it is possible to have either
+-- "ip":["1.2.3.4"]
+-- or
+-- "ip":"1.2.3.4"
+-- with the same result.
+(.:/) :: (FromJSON a) => Object -> Text -> Parser (Maybe a)
+obj .:/ key = case H.lookup key obj of
+ Nothing -> pure Nothing
+ Just v -> case v of
+ String s -> parseJSON $ Array (V.singleton v)
+ _ -> parseJSON v
+
+data IntRRService = IntRRService { isvName :: String
+ , isvProto :: String
+ , isvPrio :: Int
+ , isvWeight :: Int
+ , isvPort :: Int
+ , isvHost :: String
+ } deriving (Show, Eq)
+
+instance FromJSON IntRRService where
+ parseJSON (Array a) =
+ if length a == 6 then IntRRService
+ <$> parseJSON (a ! 0)
+ <*> parseJSON (a ! 1)
+ <*> parseJSON (a ! 2)
+ <*> parseJSON (a ! 3)
+ <*> parseJSON (a ! 4)
+ <*> parseJSON (a ! 5)
+ else empty
+ parseJSON _ = empty
+
+makeMx :: Object -> Parser (Maybe [String])
+makeMx o =
+ case H.lookup "service" o of
+ Nothing -> pure Nothing
+ Just (Array a) -> do
+ isvl <- parseJSON (Array a)
+ return $ Just $ map mxStr $ filter mxMatch isvl
+ where
+ mxMatch isv = isvName isv == "smtp"
+ && isvProto isv == "tcp"
+ && isvPort isv == 25
+ mxStr isv = (show (isvPrio isv)) ++ "\t" ++ (isvHost isv)
+ Just _ -> empty
+
+makeSubmap :: Object -> Parser (Maybe (Map String NmcDom))
+makeSubmap o = takeTls o `fmerge` takeSrv o `fmerge` takeMap o
+ where fmerge = liftA2 merge
+
+takeMap :: Object -> Parser (Maybe (Map String NmcDom))
+takeMap o =
+ case H.lookup "map" o of
+ Nothing -> pure Nothing
+ Just (Object mo) -> H.foldrWithKey addmapentry (pure (Just M.empty)) mo
+ where
+ addmapentry "" v acc = parseJSON v >>= inject acc ""
+ addmapentry k v acc = nest (splitOn "." (unpack k)) v acc
+ nest [] v acc = empty -- does not happen as a result of splitOn
+ nest [""] v acc = empty -- empty element of fqdn forbidden
+ nest [d] v acc = parseJSON v >>= inject acc d
+ nest (d:ds) v acc =
+ nest ds v acc >>= (inject acc d) . (\r -> def { domSubmap = r })
+ inject acc d r = (fmap.fmap) (M.insertWith merge d r) acc
+ _ -> empty
+
+takeSrv :: Object -> Parser (Maybe (Map String NmcDom))
+takeSrv o =
+ case H.lookup "service" o of
+ Nothing -> pure Nothing
+ Just (Array a) -> do
+ isvl <- parseJSON (Array a)
+ return $ foldr addSrv (Just M.empty) isvl
+ where
+ addSrv isv acc = subm `merge` acc
+ where
+ subm = Just (M.singleton ("_" ++ isvProto isv) sub2)
+ sub2 = def { domSubmap =
+ Just (M.singleton ("_" ++ isvName isv) sub3) }
+ sub3 = def { domSrv = Just [ NmcRRSrv (isvPrio isv)
+ (isvWeight isv)
+ (isvPort isv)
+ (isvHost isv) ] }
+ Just _ -> empty
+
+-- takeTls is almost, but not quite, entirely unlike takeSrv
+takeTls :: Object -> Parser (Maybe (Map String NmcDom))
+takeTls o =
+ case H.lookup "tls" o of
+ Nothing -> pure Nothing
+ Just (Object t) ->
+ (parseJSON (Object t) :: Parser (Map String (Map String [NmcRRTlsa])))
+ >>= tmap2dmap
+ where
+ tmap2dmap :: Map String (Map String [NmcRRTlsa])
+ -> Parser (Maybe (Map String NmcDom))
+ -- FIXME return parse error on invalid proto or port
+ tmap2dmap m1 = return $ foldrWithKey addprotoelem (Just M.empty) m1
+ addprotoelem k1 m2 acc = protoelem k1 m2 `merge` acc
+ protoelem k1 m2 = Just (M.singleton ("_" ++ k1) (pmap2dmap m2))
+ pmap2dmap m2 = foldrWithKey addportelem def m2
+ addportelem k2 v acc = portelem k2 v `merge` acc
+ portelem k2 v =
+ def { domSubmap = Just (M.singleton ("_" ++ k2)
+ def { domTlsa = Just v }) }
+ Just _ -> empty
+
+class Mergeable a where
+ merge :: a -> a -> a -- bias towads second arg
+
+instance (Ord k, Mergeable a) => Mergeable (Map k a) where
+ merge mx my = unionWith merge my mx
+
+-- Alas, the following is not possible in Haskell :-(
+-- instance Mergeable String where
+-- merge _ b = b
+
+instance Mergeable Value where
+ merge _ b = b
-data NmcRRService = NmcRRService
- { srvName :: String
- , srvProto :: String
- , srvW1 :: Int
- , srvW2 :: Int
+instance Mergeable a => Mergeable (Maybe a) where
+ merge (Just x) (Just y) = Just (merge x y)
+ merge Nothing (Just y) = Just y
+ merge (Just x) Nothing = Just x
+ merge Nothing Nothing = Nothing
+
+instance Eq a => Mergeable [a] where
+ merge xs ys = union xs ys
+
+data NmcRRSrv = NmcRRSrv
+ { srvPrio :: Int
+ , srvWeight :: Int
, srvPort :: Int
, srvHost :: String
} deriving (Show, Eq)
-instance FromJSON NmcRRService where
- parseJSON (Array a) =
- if length a == 6 then NmcRRService
- <$> parseJSON (a ! 0)
- <*> parseJSON (a ! 1)
- <*> parseJSON (a ! 2)
- <*> parseJSON (a ! 3)
- <*> parseJSON (a ! 4)
- <*> parseJSON (a ! 5)
- else empty
- parseJSON _ = empty
+instance Mergeable NmcRRSrv where
+ merge _ b = b
data NmcRRI2p = NmcRRI2p
- { i2pDestination :: String
- , i2pName :: String
- , i2pB32 :: String
+ { i2pDestination :: Maybe String
+ , i2pName :: Maybe String
+ , i2pB32 :: Maybe String
} deriving (Show, Eq)
instance FromJSON NmcRRI2p where
parseJSON (Object o) = NmcRRI2p
- <$> o .: "destination"
- <*> o .: "name"
- <*> o .: "b32"
+ <$> o .:? "destination"
+ <*> o .:? "name"
+ <*> o .:? "b32"
+ parseJSON _ = empty
+
+instance Mergeable NmcRRI2p where
+ merge _ b = b
+
+data NmcRRTlsa = NmcRRTlsa
+ { tlsMatchType :: Int -- 0:exact 1:sha256 2:sha512
+ , tlsMatchValue :: String
+ , tlsIncSubdoms :: Bool -- enforce on subdoms?
+ } deriving (Show, Eq)
+
+instance FromJSON NmcRRTlsa where
+ parseJSON (Array a) =
+ if length a == 3 then NmcRRTlsa
+ <$> parseJSON (a ! 0)
+ <*> parseJSON (a ! 1)
+ <*> case (a ! 2) of
+ Number 0 -> return False
+ Number 1 -> return True
+ _ -> empty
+ else empty
parseJSON _ = empty
-data NmcDom = NmcDom { domService :: Maybe [NmcRRService]
- , domIp :: Maybe [String]
+instance Mergeable NmcRRTlsa where
+ merge _ b = b
+
+data NmcRRDs = NmcRRDs
+ { dsKeyTag :: Int
+ , dsAlgo :: Int
+ , dsHashType :: Int
+ , dsHashValue :: String
+ } deriving (Show, Eq)
+
+instance FromJSON NmcRRDs where
+ parseJSON (Array a) =
+ if length a == 4 then NmcRRDs
+ <$> parseJSON (a ! 0)
+ <*> parseJSON (a ! 1)
+ <*> parseJSON (a ! 2)
+ <*> parseJSON (a ! 3)
+ else empty
+ parseJSON _ = empty
+
+instance Mergeable NmcRRDs where
+ merge _ b = b
+
+data NmcDom = NmcDom { domIp :: Maybe [String]
, domIp6 :: Maybe [String]
, domTor :: Maybe String
, domI2p :: Maybe NmcRRI2p
, domLoc :: Maybe String
, domInfo :: Maybe Value
, domNs :: Maybe [String]
- , domDelegate :: Maybe [String]
- , domImport :: Maybe String
- , domMap :: Maybe (Map String NmcDom)
+ , domDelegate :: Maybe String
+ , domImport :: Maybe [String]
+ , domSubmap :: Maybe (Map String NmcDom)
, domFingerprint :: Maybe [String]
- , domTls :: Maybe (Map String
- (Map String [[String]]))
- , domDs :: Maybe [[String]]
+ , domDs :: Maybe [NmcRRDs]
+ , domMx :: Maybe [String] -- Synthetic
+ , domSrv :: Maybe [NmcRRSrv] -- Synthetic
+ , domTlsa :: Maybe [NmcRRTlsa] -- Synthetic
} deriving (Show, Eq)
+instance Default NmcDom where
+ def = NmcDom Nothing Nothing Nothing Nothing Nothing Nothing Nothing
+ Nothing Nothing Nothing Nothing Nothing Nothing Nothing
+ Nothing Nothing Nothing Nothing Nothing
+
instance FromJSON NmcDom where
-- Wherever we expect a domain object, there may be a string
-- containing IPv4 address. Interpret it as such.
-- Question: shall we try to recognize IPv6 addresses too?
parseJSON (String s) =
return $ if isIPv4 s'
- then emptyNmcDom { domIp = Just [s'] }
- else emptyNmcDom
+ then def { domIp = Just [s'] }
+ else def
where
- s' = T.unpack s
+ s' = unpack s
isIPv4 x = all isNibble $ splitOn "." x
isNibble x =
if all isDigit x then (read x :: Int) < 256
else False
parseJSON (Object o) = NmcDom
- <$> o .:? "service"
- <*> o .:? "ip"
- <*> o .:? "ip6"
+ <$> o .:/ "ip"
+ <*> o .:/ "ip6"
<*> o .:? "tor"
<*> o .:? "i2p"
<*> o .:? "freenet"
<*> o .:? "email"
<*> o .:? "loc"
<*> o .:? "info"
- <*> o .:? "ns"
+ <*> o .:/ "ns"
<*> o .:? "delegate"
- <*> o .:? "import"
- <*> o .:? "map"
- <*> o .:? "fingerprint"
- <*> o .:? "tls"
+ <*> o .:/ "import"
+ <*> makeSubmap o
+ <*> o .:/ "fingerprint"
<*> o .:? "ds"
+ <*> makeMx o
+ <*> return Nothing -- domSrv created in subdomains
+ <*> return Nothing -- domTlsa created in subdomains
parseJSON _ = empty
-emptyNmcDom = NmcDom Nothing Nothing Nothing Nothing Nothing Nothing
- Nothing Nothing Nothing Nothing Nothing Nothing
- Nothing Nothing Nothing Nothing Nothing Nothing
-
--- FIXME -- I hope there exists a better way to merge records!
-mergeNmcDom :: NmcDom -> NmcDom -> NmcDom
-mergeNmcDom sub dom = dom { domService = choose domService
- , domIp = choose domIp
- , domIp6 = choose domIp6
- , domTor = choose domTor
- , domI2p = choose domI2p
- , domFreenet = choose domFreenet
- , domAlias = choose domAlias
- , domTranslate = choose domTranslate
- , domEmail = choose domEmail
- , domLoc = choose domLoc
- , domInfo = choose domInfo
- , domNs = choose domNs
- , domDelegate = choose domDelegate
- , domImport = choose domImport
- , domMap = choose domMap
- , domFingerprint = choose domFingerprint
- , domTls = choose domTls
- , domDs = choose domDs
- }
- where
- choose :: (NmcDom -> Maybe a) -> Maybe a
- choose field = case field dom of
- Nothing -> field sub
- Just x -> Just x
-
--- | Perform query and return error string or parsed domain object
-queryNmcDom ::
- (String -> IO (Either String ByteString)) -- ^ query operation action
- -> String -- ^ key
- -> IO (Either String NmcDom) -- ^ error string or domain
-queryNmcDom queryOp key = do
- l <- queryOp key
- case l of
- Left estr -> return $ Left estr
- Right str -> case decode str :: Maybe NmcDom of
- Nothing -> return $ Left $ "Unparseable value: " ++ (show str)
- Just dom -> return $ Right dom
-
--- | Try to fetch "import" object and merge it into the base domain
--- Original "import" element is removed, but new imports from the
--- imported objects are processed recursively until there are none.
-mergeImport ::
- (String -> IO (Either String ByteString)) -- ^ query operation action
- -> NmcDom -- ^ base domain
- -> IO (Either String NmcDom) -- ^ result with merged import
-mergeImport queryOp base = do
- let
- mbase = mergeSelf base
- base' = mbase {domImport = Nothing}
- -- print base
- case domImport mbase of
- Nothing -> return $ Right base'
- Just key -> do
- sub <- queryNmcDom queryOp key
- case sub of
- Left e -> return $ Left e
- Right sub' -> mergeImport queryOp $ sub' `mergeNmcDom` base'
-
--- | If there is an element in the map with key "", merge the contents
--- and remove this element. Do this recursively.
-mergeSelf :: NmcDom -> NmcDom
-mergeSelf base =
- let
- map = domMap base
- base' = base {domMap = removeSelf map}
- removeSelf Nothing = Nothing
- removeSelf (Just map) = if size map' == 0 then Nothing else Just map'
- where map' = M.delete "" map
- in
- case map of
- Nothing -> base'
- Just map' ->
- case M.lookup "" map' of
- Nothing -> base'
- Just sub -> (mergeSelf sub) `mergeNmcDom` base'
-
--- | Presence of some elements require removal of some others
-normalizeDom :: NmcDom -> NmcDom
-normalizeDom dom = foldr id dom [ translateNormalizer
- -- , nsNormalizer -- FIXME retrun this
- ]
- where
- nsNormalizer dom = case domNs dom of
- Nothing -> dom
- Just ns -> emptyNmcDom { domNs = domNs dom, domEmail = domEmail dom }
- translateNormalizer dom = case domTranslate dom of
- Nothing -> dom
- Just tr -> dom { domMap = Nothing }
-
--- | Merge imports and Selfs and follow the maps tree to get dom
-descendNmcDom ::
- (String -> IO (Either String ByteString)) -- ^ query operation action
- -> [String] -- ^ subdomain chain
- -> NmcDom -- ^ base domain
- -> IO (Either String NmcDom) -- ^ fully processed result
-descendNmcDom queryOp subdom base = do
- base' <- mergeImport queryOp base
- case subdom of
- [] -> return $ fmap normalizeDom base'
- d:ds ->
- case base' of
- Left err -> return base'
- Right base'' ->
- case domMap base'' of
- Nothing -> return $ Right emptyNmcDom
- Just map ->
- case M.lookup d map of
- Nothing -> return $ Right emptyNmcDom
- Just sub -> descendNmcDom queryOp ds sub
-
--- | Initial NmcDom populated with "import" only, suitable for "descend"
-seedNmcDom ::
- String -- ^ domain key (without namespace prefix)
- -> NmcDom -- ^ resulting seed domain
-seedNmcDom dn = emptyNmcDom { domImport = Just ("d/" ++ dn)}
+instance Mergeable NmcDom where
+ merge sub dom = dom { domIp = mergelm domIp
+ , domIp6 = mergelm domIp6
+ , domTor = choose domTor
+ , domI2p = mergelm domI2p
+ , domFreenet = choose domFreenet
+ , domAlias = choose domAlias
+ , domTranslate = choose domTranslate
+ , domEmail = choose domEmail
+ , domLoc = choose domLoc
+ , domInfo = mergelm domInfo
+ , domNs = mergelm domNs
+ , domDelegate = mergelm domDelegate
+ , domImport = mergelm domImport
+ , domSubmap = mergelm domSubmap
+ , domFingerprint = mergelm domFingerprint
+ , domDs = mergelm domDs
+ , domMx = mergelm domMx
+ , domSrv = mergelm domSrv
+ , domTlsa = mergelm domTlsa
+ }
+ where
+ mergelm x = merge (x sub) (x dom)
+-- Because it is not possible to define instance of merge for Strings,
+-- we have to treat string elements separately, otherwise strings are
+-- 'unioned' along with the rest of lists. Ugly, but alternatives are worse.
+ choose field = case field dom of
+ Nothing -> field sub
+ Just x -> Just x
projects / pdns-pipe-nmc.git / blobdiff