1 {-# LANGUAGE OverloadedStrings #-}
3 module NmcDom ( NmcDom(..)
11 import Prelude hiding (length)
12 import Control.Applicative ((<$>), (<*>), 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)
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 = ((.).(.)) merge merge <$> takeTls o <*> takeSrv o <*> takeMap o
76 takeMap :: Object -> Parser (Maybe (Map String NmcDom))
77 takeMap o = o .:? "map"
79 takeSrv :: Object -> Parser (Maybe (Map String NmcDom))
81 case H.lookup "service" o of
82 Nothing -> pure Nothing
84 isvl <- parseJSON (Array a)
85 return $ foldr addSrv (Just M.empty) isvl
87 addSrv isv acc = subm `merge` acc
89 subm = Just (M.singleton ("_" ++ isvProto isv) sub2)
90 sub2 = def { domSubmap =
91 Just (M.singleton ("_" ++ isvName isv) sub3) }
92 sub3 = def { domSrv = Just [ NmcRRSrv (isvPrio isv)
98 -- takeTls is almost, but not quite, entirely unlike takeSrv
99 takeTls :: Object -> Parser (Maybe (Map String NmcDom))
101 case H.lookup "tls" o of
102 Nothing -> pure Nothing
104 (parseJSON (Object t) :: Parser (Map String (Map String [NmcRRTlsa])))
107 tmap2dmap :: Map String (Map String [NmcRRTlsa])
108 -> Parser (Maybe (Map String NmcDom))
109 -- FIXME return parse error on invalid proto or port
110 tmap2dmap m1 = return $ foldrWithKey addprotoelem (Just M.empty) m1
111 addprotoelem k1 m2 acc = protoelem k1 m2 `merge` acc
112 protoelem k1 m2 = Just (M.singleton ("_" ++ k1) (pmap2dmap m2))
113 pmap2dmap m2 = foldrWithKey addportelem def m2
114 addportelem k2 v acc = portelem k2 v `merge` acc
116 def { domSubmap = Just (M.singleton ("_" ++ k2)
117 def { domTlsa = Just v }) }
120 class Mergeable a where
121 merge :: a -> a -> a -- bias towads second arg
123 instance (Ord k, Mergeable a) => Mergeable (Map k a) where
124 merge mx my = unionWith merge my mx
126 -- Alas, the following is not possible in Haskell :-(
127 -- instance Mergeable String where
130 instance Mergeable Value where
133 instance Mergeable a => Mergeable (Maybe a) where
134 merge (Just x) (Just y) = Just (merge x y)
135 merge Nothing (Just y) = Just y
136 merge (Just x) Nothing = Just x
137 merge Nothing Nothing = Nothing
139 instance Eq a => Mergeable [a] where
140 merge xs ys = union xs ys
142 data NmcRRSrv = NmcRRSrv
147 } deriving (Show, Eq)
149 instance Mergeable NmcRRSrv where
152 data NmcRRI2p = NmcRRI2p
153 { i2pDestination :: Maybe String
154 , i2pName :: Maybe String
155 , i2pB32 :: Maybe String
156 } deriving (Show, Eq)
158 instance FromJSON NmcRRI2p where
159 parseJSON (Object o) = NmcRRI2p
160 <$> o .:? "destination"
165 instance Mergeable NmcRRI2p where
168 data NmcRRTlsa = NmcRRTlsa
169 { tlsMatchType :: Int -- 0:exact 1:sha256 2:sha512
170 , tlsMatchValue :: String
171 , tlsIncSubdoms :: Int -- 1:enforce on subdoms 0:no
172 } deriving (Show, Eq)
174 instance FromJSON NmcRRTlsa where
175 parseJSON (Array a) =
176 if length a == 3 then NmcRRTlsa
177 <$> parseJSON (a ! 0)
178 <*> parseJSON (a ! 1)
179 <*> parseJSON (a ! 2)
183 instance Mergeable NmcRRTlsa where
186 data NmcRRDs = NmcRRDs
190 , dsHashValue :: String
191 } deriving (Show, Eq)
193 instance FromJSON NmcRRDs where
194 parseJSON (Array a) =
195 if length a == 4 then NmcRRDs
196 <$> parseJSON (a ! 0)
197 <*> parseJSON (a ! 1)
198 <*> parseJSON (a ! 2)
199 <*> parseJSON (a ! 3)
203 instance Mergeable NmcRRDs where
206 data NmcDom = NmcDom { domIp :: Maybe [String]
207 , domIp6 :: Maybe [String]
208 , domTor :: Maybe String
209 , domI2p :: Maybe NmcRRI2p
210 , domFreenet :: Maybe String
211 , domAlias :: Maybe String
212 , domTranslate :: Maybe String
213 , domEmail :: Maybe String
214 , domLoc :: Maybe String
215 , domInfo :: Maybe Value
216 , domNs :: Maybe [String]
217 , domDelegate :: Maybe String
218 , domImport :: Maybe [String]
219 , domSubmap :: Maybe (Map String NmcDom)
220 , domFingerprint :: Maybe [String]
221 , domDs :: Maybe [NmcRRDs]
222 , domMx :: Maybe [String] -- Synthetic
223 , domSrv :: Maybe [NmcRRSrv] -- Synthetic
224 , domTlsa :: Maybe [NmcRRTlsa] -- Synthetic
225 } deriving (Show, Eq)
227 instance Default NmcDom where
228 def = NmcDom Nothing Nothing Nothing Nothing Nothing Nothing Nothing
229 Nothing Nothing Nothing Nothing Nothing Nothing Nothing
230 Nothing Nothing Nothing Nothing Nothing
232 instance FromJSON NmcDom where
233 -- Wherever we expect a domain object, there may be a string
234 -- containing IPv4 address. Interpret it as such.
235 -- Question: shall we try to recognize IPv6 addresses too?
236 parseJSON (String s) =
237 return $ if isIPv4 s'
238 then def { domIp = Just [s'] }
242 isIPv4 x = all isNibble $ splitOn "." x
244 if all isDigit x then (read x :: Int) < 256
246 parseJSON (Object o) = NmcDom
253 <*> o .:? "translate"
261 <*> o .:/ "fingerprint"
264 <*> return Nothing -- domSrv created in subdomains
265 <*> return Nothing -- domTlsa created in subdomains
268 instance Mergeable NmcDom where
269 merge sub dom = dom { domIp = mergelm domIp
270 , domIp6 = mergelm domIp6
271 , domTor = choose domTor
272 , domI2p = mergelm domI2p
273 , domFreenet = choose domFreenet
274 , domAlias = choose domAlias
275 , domTranslate = choose domTranslate
276 , domEmail = choose domEmail
277 , domLoc = choose domLoc
278 , domInfo = mergelm domInfo
279 , domNs = mergelm domNs
280 , domDelegate = mergelm domDelegate
281 , domImport = mergelm domImport
282 , domSubmap = mergelm domSubmap
283 , domFingerprint = mergelm domFingerprint
284 , domDs = mergelm domDs
285 , domMx = mergelm domMx
286 , domSrv = mergelm domSrv
287 , domTlsa = mergelm domTlsa
290 mergelm x = merge (x sub) (x dom)
291 -- Because it is not possible to define instance of merge for Strings,
292 -- we have to treat string elements separately, otherwise strings are
293 -- 'unioned' along with the rest of lists. Ugly, but alternatives are worse.
294 choose field = case field dom of