SRV hack part 2

[pdns-pipe-nmc.git] / NmcDom.hs

diff --git a/NmcDom.hs b/NmcDom.hs
index fe87270c728d31a51064c35c50742ec69e8d3b48..3f6c7bc3e364fe633c0122cb5220364738be9306 100644 (file)
--- a/NmcDom.hs
+++ b/NmcDom.hs
@@ -41,8 +41,8 @@ instance Eq a => Mergeable [a] where
 data NmcRRService = NmcRRService
                         { srvName       :: String
                         , srvProto      :: String
-                        , srvW1         :: Int
-                        , srvW2         :: Int
+                        , srvPrio       :: Int
+                        , srvWeight     :: Int
                         , srvPort       :: Int
                         , srvHost       :: String
                         } deriving (Show, Eq)
@@ -186,20 +186,22 @@ queryNmcDom queryOp key = do
 --   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 base = do
+mergeImport queryOp depth base = do
   let
     mbase = mergeSelf base
     base' = mbase {domImport = Nothing}
   -- print base
-  case domImport mbase of
+  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 $ sub' `merge` base'
+        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.
@@ -218,11 +220,20 @@ mergeSelf base =
         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 [ translateNormalizer
-                                -- , nsNormalizer -- FIXME retrun this
+normalizeDom dom = foldr id dom [ srvNormalizer
+                                , translateNormalizer
+                                , nsNormalizer
                                 ]
   where
     nsNormalizer dom = case domNs dom of
@@ -231,6 +242,7 @@ normalizeDom dom = foldr id dom [ translateNormalizer
     translateNormalizer dom = case domTranslate dom of
       Nothing  -> dom
       Just tr  -> dom { domMap = Nothing }
+    srvNormalizer dom = dom { domService = Nothing }
 
 -- | Merge imports and Selfs and follow the maps tree to get dom
 descendNmcDom ::
@@ -239,9 +251,11 @@ descendNmcDom ::
   -> NmcDom                                 -- ^ base domain
   -> IO (Either String NmcDom)              -- ^ fully processed result
 descendNmcDom queryOp subdom base = do
-  base' <- mergeImport queryOp base
+  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'