{-# LANGUAGE OverloadedStrings #-}
module NmcDom ( NmcDom(..)
- , NmcRRService(..)
- , emptyNmcDom
- , seedNmcDom
- , descendNmcDom
+ , NmcRRSrv(..)
+ , NmcRRI2p(..)
+ , NmcRRTlsa(..)
+ , NmcRRDs(..)
+ , merge
) where
import Prelude hiding (length)
-import Data.ByteString.Lazy (ByteString)
+import Control.Applicative ((<$>), (<*>), empty, pure)
+import Data.Char
import Data.Text (Text, unpack)
-import Data.List as L (union)
+import Data.List (union)
import Data.List.Split
-import Data.Char
-import Data.Map as M (Map, lookup, delete, size, unionWith)
-import Data.Vector (toList,(!),length, singleton)
-import Control.Applicative ((<$>), (<*>), empty, pure)
+import Data.Vector ((!), length, singleton)
+import Data.Map (Map, unionWith)
+import qualified Data.HashMap.Strict as H (lookup)
import Data.Aeson
-
-import qualified Data.HashMap.Strict as H
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
String s -> parseJSON $ Array (singleton v)
_ -> parseJSON v
+makeMx :: Object -> Parser (Maybe [String])
+makeMx o = return Nothing -- FIXME
+{-
+ case H.lookup "service" o of
+ Nothing -> pure Nothing
+ Just (Array saa) -> return $ Just $ fmap mxStr $ filter mxMatch saa
+ where
+ mxMatch sa = (sa ! 0) == "smtp" && (sa ! 1) == "tcp" && (sa ! 4) == 25
+ mxStr sa = (sa ! 2) ++ "\t" ++ (sa ! 5)
+ _ -> empty
+-}
+makeSubmap :: Object -> Parser (Maybe (Map String NmcDom))
+makeSubmap o = o .:? "map" -- FIXME
+
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 = M.unionWith merge my mx
+ merge mx my = unionWith merge my mx
+-- Alas, the following is not possible in Haskell :-(
-- instance Mergeable String where
-- merge _ b = b
merge Nothing Nothing = Nothing
instance Eq a => Mergeable [a] where
- merge xs ys = L.union xs ys
+ merge xs ys = union xs ys
-data NmcRRService = NmcRRService
- { srvName :: String
- , srvProto :: String
- , srvPrio :: Int
+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
- <$> parseJSON (a ! 0)
- <*> parseJSON (a ! 1)
- <*> parseJSON (a ! 2)
- <*> parseJSON (a ! 3)
- <*> parseJSON (a ! 4)
- <*> parseJSON (a ! 5)
- else empty
- parseJSON _ = empty
-
-instance Mergeable NmcRRService where
+instance Mergeable NmcRRSrv where
merge _ b = b
data NmcRRI2p = NmcRRI2p
- { i2pDestination :: String
- , i2pName :: String
- , i2pB32 :: String
+ { i2pDestination :: Maybe String
+ , i2pName :: Maybe String
+ , i2pB32 :: Maybe String
} deriving (Show, Eq)
instance FromJSON NmcRRI2p where
parseJSON (Object o) = NmcRRI2p
- <$> o .: "destination"
- <*> o .: "name"
- <*> o .: "b32"
+ <$> o .:? "destination"
+ <*> o .:? "name"
+ <*> o .:? "b32"
parseJSON _ = empty
instance Mergeable NmcRRI2p where
merge _ b = b
-data NmcRRTls = NmcRRTls
+data NmcRRTlsa = NmcRRTlsa
{ tlsMatchType :: Int -- 0:exact 1:sha256 2:sha512
, tlsMatchValue :: String
, tlsIncSubdoms :: Int -- 1:enforce on subdoms 0:no
} deriving (Show, Eq)
-instance FromJSON NmcRRTls where
- parseJSON (Array a) =
- if length a == 3 then NmcRRTls
- <$> parseJSON (a ! 0)
- <*> parseJSON (a ! 1)
- <*> parseJSON (a ! 2)
- else empty
- parseJSON _ = empty
-
-instance Mergeable NmcRRTls where
+instance Mergeable NmcRRTlsa where
merge _ b = b
data NmcRRDs = NmcRRDs
instance Mergeable NmcRRDs where
merge _ b = b
-data NmcDom = NmcDom { domService :: Maybe [NmcRRService]
- , domIp :: Maybe [String]
+data NmcDom = NmcDom { domIp :: Maybe [String]
, domIp6 :: Maybe [String]
, domTor :: Maybe String
, domI2p :: Maybe NmcRRI2p
, domInfo :: Maybe Value
, domNs :: Maybe [String]
, domDelegate :: Maybe String
- , domImport :: Maybe String
- , domMap :: Maybe (Map String NmcDom)
+ , domImport :: Maybe [String]
+ , domSubmap :: Maybe (Map String NmcDom)
, domFingerprint :: Maybe [String]
- , domTls :: Maybe (Map String
- (Map String [NmcRRTls]))
, domDs :: Maybe [NmcRRDs]
- , domMx :: Maybe [String] -- Synthetic
+ , 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' = unpack s
isIPv4 x = all isNibble $ splitOn "." x
if all isDigit x then (read x :: Int) < 256
else False
parseJSON (Object o) = NmcDom
- <$> o .:? "service"
- <*> o .:/ "ip"
+ <$> o .:/ "ip"
<*> o .:/ "ip6"
<*> o .:? "tor"
<*> o .:? "i2p"
<*> o .:? "info"
<*> o .:/ "ns"
<*> o .:? "delegate"
- <*> o .:? "import"
- <*> o .:? "map"
+ <*> o .:/ "import"
+ <*> makeSubmap o
<*> o .:/ "fingerprint"
- <*> o .:? "tls"
<*> o .:? "ds"
- <*> return Nothing -- domMx not parsed
+ <*> makeMx o
+ <*> return Nothing -- domSrv created in subdomains
+ <*> return Nothing -- domTlsa created in subdomains
parseJSON _ = empty
instance Mergeable NmcDom where
- merge sub dom = dom { domService = mergelm domService
- , domIp = mergelm domIp
+ merge sub dom = dom { domIp = mergelm domIp
, domIp6 = mergelm domIp6
, domTor = choose domTor
, domI2p = mergelm domI2p
, domInfo = mergelm domInfo
, domNs = mergelm domNs
, domDelegate = mergelm domDelegate
- , domImport = choose domImport
- , domMap = mergelm domMap
+ , domImport = mergelm domImport
+ , domSubmap = mergelm domSubmap
, domFingerprint = mergelm domFingerprint
- , domTls = mergelm domTls
, domDs = mergelm domDs
, domMx = mergelm domMx
+ , domSrv = mergelm domSrv
+ , domTlsa = mergelm domTlsa
}
where
mergelm x = merge (x sub) (x dom)
choose field = case field dom of
Nothing -> field sub
Just x -> Just x
-
-
-emptyNmcDom = NmcDom Nothing Nothing Nothing Nothing Nothing Nothing
- Nothing Nothing Nothing Nothing Nothing Nothing
- Nothing Nothing Nothing Nothing Nothing Nothing
- Nothing
-
--- | 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
- -> Int -- ^ recursion counter
- -> NmcDom -- ^ base domain
- -> IO (Either String NmcDom) -- ^ result with merged import
-mergeImport queryOp depth base = do
- let
- mbase = mergeSelf base
- base' = mbase {domImport = Nothing}
- -- print base
- if depth <= 0 then return $ Left "Nesting of imports is too deep"
- else 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 (depth - 1) $ sub' `merge` 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) `merge` base'
- -- recursion depth limited by the size of the record
-
--- | SRV case - remove everyting and filter SRV records
-normalizeSrv :: String -> String -> NmcDom -> NmcDom
-normalizeSrv serv proto dom =
- emptyNmcDom {domService = fmap (filter needed) (domService dom)}
- where
- needed r = srvName r == serv && srvProto r == proto
-
--- | Presence of some elements require removal of some others
-normalizeDom :: NmcDom -> NmcDom
-normalizeDom dom = foldr id dom [ srvNormalizer
- , translateNormalizer
- , nsNormalizer
- ]
- 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 }
- srvNormalizer dom = dom { domService = Nothing, domMx = makemx }
- where
- makemx = case domService dom of
- Nothing -> Nothing
- Just svl -> Just $ map makerec (filter needed svl)
- where
- needed sr = srvName sr == "smtp"
- && srvProto sr == "tcp"
- && srvPort sr == 25
- makerec sr = (show (srvPrio sr)) ++ " " ++ (srvHost sr)
-
--- | 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 10 base
- case subdom of
- [] -> return $ fmap normalizeDom base'
- -- A hack to handle SRV records: don't descend if ["_prot","_serv"]
- [('_':p),('_':s)] -> return $ fmap (normalizeSrv s p) 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)}
projects / pdns-pipe-nmc.git / blobdiff