1 {-# LANGUAGE OverloadedStrings #-}
3 module NmcDom ( NmcDom(..)
11 import Prelude hiding (length)
12 import Control.Applicative ((<$>), (<*>), liftA2, empty, pure)
14 import Data.Text (Text, unpack)
15 import Data.List (union)
16 import Data.List.Split
17 import Data.Vector ((!), length)
18 import qualified Data.Vector as V (singleton)
19 import Data.Map (Map, unionWith, foldrWithKey)
20 import qualified Data.Map as M (singleton, empty, insert, insertWith)
21 import qualified Data.HashMap.Strict as H (lookup)
23 import Data.Aeson.Types
24 import Data.Default.Class
26 -- Variant of Aeson's `.:?` that interprets a String as a
27 -- single-element list, so it is possible to have either
31 -- with the same result.
32 (.:/) :: (FromJSON a) => Object -> Text -> Parser (Maybe a)
33 obj .:/ key = case H.lookup key obj of
34 Nothing -> pure Nothing
36 String s -> parseJSON $ Array (V.singleton v)
39 data IntRRService = IntRRService { isvName :: String
47 instance FromJSON IntRRService where
49 if length a == 6 then IntRRService
59 makeMx :: Object -> Parser (Maybe [String])
61 case H.lookup "service" o of
62 Nothing -> pure Nothing
64 isvl <- parseJSON (Array a)
65 return $ Just $ map mxStr $ filter mxMatch isvl
67 mxMatch isv = isvName isv == "smtp"
68 && isvProto isv == "tcp"
70 mxStr isv = (show (isvPrio isv)) ++ "\t" ++ (isvHost isv)
73 makeSubmap :: Object -> Parser (Maybe (Map String NmcDom))
74 makeSubmap o = takeTls o `fmerge` takeSrv o `fmerge` takeMap o
75 where fmerge = liftA2 merge
77 takeMap :: Object -> Parser (Maybe (Map String NmcDom))
79 case H.lookup "map" o of
80 Nothing -> pure Nothing
81 Just (Object mo) -> do
82 raw <- (parseJSON (Object mo) :: Parser (Maybe (Map String NmcDom)))
83 let result = fmap splitup raw
86 splitup :: Map String NmcDom -> Map String NmcDom
87 splitup x = foldrWithKey stow M.empty x
88 stow fqdn sdom acc = M.insertWith merge fqdn' sdom' acc
90 (fqdn', sdom') = nest (filter (/= "") (splitOnDots fqdn), sdom)
91 splitOnDots s = splitOn "." s
92 nest ([], v) = (fqdn, v) -- preserve "self" map entry
93 nest ([k], v) = (k, v)
95 nest (ks, def { domSubmap = Just (M.singleton k v) })
98 takeSrv :: Object -> Parser (Maybe (Map String NmcDom))
100 case H.lookup "service" o of
101 Nothing -> pure Nothing
103 isvl <- parseJSON (Array a)
104 return $ foldr addSrv (Just M.empty) isvl
106 addSrv isv acc = subm `merge` acc
108 subm = Just (M.singleton ("_" ++ isvProto isv) sub2)
109 sub2 = def { domSubmap =
110 Just (M.singleton ("_" ++ isvName isv) sub3) }
111 sub3 = def { domSrv = Just [ NmcRRSrv (isvPrio isv)
117 -- takeTls is almost, but not quite, entirely unlike takeSrv
118 takeTls :: Object -> Parser (Maybe (Map String NmcDom))
120 case H.lookup "tls" o of
121 Nothing -> pure Nothing
123 (parseJSON (Object t) :: Parser (Map String (Map String [NmcRRTlsa])))
126 tmap2dmap :: Map String (Map String [NmcRRTlsa])
127 -> Parser (Maybe (Map String NmcDom))
128 -- FIXME return parse error on invalid proto or port
129 tmap2dmap m1 = return $ foldrWithKey addprotoelem (Just M.empty) m1
130 addprotoelem k1 m2 acc = protoelem k1 m2 `merge` acc
131 protoelem k1 m2 = Just (M.singleton ("_" ++ k1) (pmap2dmap m2))
132 pmap2dmap m2 = foldrWithKey addportelem def m2
133 addportelem k2 v acc = portelem k2 v `merge` acc
135 def { domSubmap = Just (M.singleton ("_" ++ k2)
136 def { domTlsa = Just v }) }
139 class Mergeable a where
140 merge :: a -> a -> a -- bias towads second arg
142 instance (Ord k, Mergeable a) => Mergeable (Map k a) where
143 merge mx my = unionWith merge my mx
145 -- Alas, the following is not possible in Haskell :-(
146 -- instance Mergeable String where
149 instance Mergeable Value where
152 instance Mergeable a => Mergeable (Maybe a) where
153 merge (Just x) (Just y) = Just (merge x y)
154 merge Nothing (Just y) = Just y
155 merge (Just x) Nothing = Just x
156 merge Nothing Nothing = Nothing
158 instance Eq a => Mergeable [a] where
159 merge xs ys = union xs ys
161 data NmcRRSrv = NmcRRSrv
166 } deriving (Show, Eq)
168 instance Mergeable NmcRRSrv where
171 data NmcRRI2p = NmcRRI2p
172 { i2pDestination :: Maybe String
173 , i2pName :: Maybe String
174 , i2pB32 :: Maybe String
175 } deriving (Show, Eq)
177 instance FromJSON NmcRRI2p where
178 parseJSON (Object o) = NmcRRI2p
179 <$> o .:? "destination"
184 instance Mergeable NmcRRI2p where
187 data NmcRRTlsa = NmcRRTlsa
188 { tlsMatchType :: Int -- 0:exact 1:sha256 2:sha512
189 , tlsMatchValue :: String
190 , tlsIncSubdoms :: Int -- 1:enforce on subdoms 0:no
191 } deriving (Show, Eq)
193 instance FromJSON NmcRRTlsa where
194 parseJSON (Array a) =
195 if length a == 3 then NmcRRTlsa
196 <$> parseJSON (a ! 0)
197 <*> parseJSON (a ! 1)
198 <*> parseJSON (a ! 2)
202 instance Mergeable NmcRRTlsa where
205 data NmcRRDs = NmcRRDs
209 , dsHashValue :: String
210 } deriving (Show, Eq)
212 instance FromJSON NmcRRDs where
213 parseJSON (Array a) =
214 if length a == 4 then NmcRRDs
215 <$> parseJSON (a ! 0)
216 <*> parseJSON (a ! 1)
217 <*> parseJSON (a ! 2)
218 <*> parseJSON (a ! 3)
222 instance Mergeable NmcRRDs where
225 data NmcDom = NmcDom { domIp :: Maybe [String]
226 , domIp6 :: Maybe [String]
227 , domTor :: Maybe String
228 , domI2p :: Maybe NmcRRI2p
229 , domFreenet :: Maybe String
230 , domAlias :: Maybe String
231 , domTranslate :: Maybe String
232 , domEmail :: Maybe String
233 , domLoc :: Maybe String
234 , domInfo :: Maybe Value
235 , domNs :: Maybe [String]
236 , domDelegate :: Maybe String
237 , domImport :: Maybe [String]
238 , domSubmap :: Maybe (Map String NmcDom)
239 , domFingerprint :: Maybe [String]
240 , domDs :: Maybe [NmcRRDs]
241 , domMx :: Maybe [String] -- Synthetic
242 , domSrv :: Maybe [NmcRRSrv] -- Synthetic
243 , domTlsa :: Maybe [NmcRRTlsa] -- Synthetic
244 } deriving (Show, Eq)
246 instance Default NmcDom where
247 def = NmcDom Nothing Nothing Nothing Nothing Nothing Nothing Nothing
248 Nothing Nothing Nothing Nothing Nothing Nothing Nothing
249 Nothing Nothing Nothing Nothing Nothing
251 instance FromJSON NmcDom where
252 -- Wherever we expect a domain object, there may be a string
253 -- containing IPv4 address. Interpret it as such.
254 -- Question: shall we try to recognize IPv6 addresses too?
255 parseJSON (String s) =
256 return $ if isIPv4 s'
257 then def { domIp = Just [s'] }
261 isIPv4 x = all isNibble $ splitOn "." x
263 if all isDigit x then (read x :: Int) < 256
265 parseJSON (Object o) = NmcDom
272 <*> o .:? "translate"
280 <*> o .:/ "fingerprint"
283 <*> return Nothing -- domSrv created in subdomains
284 <*> return Nothing -- domTlsa created in subdomains
287 instance Mergeable NmcDom where
288 merge sub dom = dom { domIp = mergelm domIp
289 , domIp6 = mergelm domIp6
290 , domTor = choose domTor
291 , domI2p = mergelm domI2p
292 , domFreenet = choose domFreenet
293 , domAlias = choose domAlias
294 , domTranslate = choose domTranslate
295 , domEmail = choose domEmail
296 , domLoc = choose domLoc
297 , domInfo = mergelm domInfo
298 , domNs = mergelm domNs
299 , domDelegate = mergelm domDelegate
300 , domImport = mergelm domImport
301 , domSubmap = mergelm domSubmap
302 , domFingerprint = mergelm domFingerprint
303 , domDs = mergelm domDs
304 , domMx = mergelm domMx
305 , domSrv = mergelm domSrv
306 , domTlsa = mergelm domTlsa
309 mergelm x = merge (x sub) (x dom)
310 -- Because it is not possible to define instance of merge for Strings,
311 -- we have to treat string elements separately, otherwise strings are
312 -- 'unioned' along with the rest of lists. Ugly, but alternatives are worse.
313 choose field = case field dom of