module PowerDns ( RRType(..)
+ , rrType
, PdnsRequest(..)
, pdnsParse
, pdnsReport
, pdnsOut
+ , pdnsOutXfr
) where
-import NmcJson
+import Data.Text.Lazy (splitOn, pack)
+
+import NmcDom
data RRType = RRTypeSRV | RRTypeA | RRTypeAAAA | RRTypeCNAME
| RRTypeDNAME | RRTypeSOA | RRTypeRP | RRTypeLOC
- | RRTypeNS | RRTypeDS
- | RRTypeANY | RRTypeError String
- deriving (Show)
+ | RRTypeNS | RRTypeDS | RRTypeMX
+ | RRTypeANY | RRTypeError String
+
+instance Show RRType where
+ show RRTypeSRV = "SRV"
+ show RRTypeA = "A"
+ show RRTypeAAAA = "AAAA"
+ show RRTypeCNAME = "CNAME"
+ show RRTypeDNAME = "DNAME"
+ show RRTypeSOA = "SOA"
+ show RRTypeRP = "RP"
+ show RRTypeLOC = "LOC"
+ show RRTypeNS = "NS"
+ show RRTypeDS = "DS"
+ show RRTypeMX = "MX"
+ show RRTypeANY = "ANY"
+ show (RRTypeError s) = "Unknown RR type: " ++ (show s)
+
+rrType qt = case qt of
+ "SRV" -> RRTypeSRV
+ "A" -> RRTypeA
+ "AAAA" -> RRTypeAAAA
+ "CNAME" -> RRTypeCNAME
+ "DNAME" -> RRTypeDNAME
+ "SOA" -> RRTypeSOA
+ "RP" -> RRTypeRP
+ "LOC" -> RRTypeLOC
+ "NS" -> RRTypeNS
+ "DS" -> RRTypeDS
+ "MX" -> RRTypeMX
+ "ANY" -> RRTypeANY
+ _ -> RRTypeError qt
data PdnsRequest = PdnsRequestQ
{ qName :: String
, qType :: RRType
- , iD :: String
+ , iD :: Int
, remoteIpAddress :: String
, localIpAddress :: Maybe String
, ednsSubnetAddress :: Maybe String
}
- | PdnsRequestAXFR String
+ | PdnsRequestAXFR Int
| PdnsRequestPing
deriving (Show)
+-- | Parse request string read from the core PowerDNS process
+pdnsParse :: Int -> String -> Either String PdnsRequest
pdnsParse ver s =
let
- getQt qt = case qt of
- "SRV" -> RRTypeSRV
- "A" -> RRTypeA
- "AAAA" -> RRTypeAAAA
- "CNAME" -> RRTypeCNAME
- "DNAME" -> RRTypeDNAME
- "SOA" -> RRTypeSOA
- "RP" -> RRTypeRP
- "LOC" -> RRTypeLOC
- "NS" -> RRTypeNS
- "DS" -> RRTypeDS
- "ANY" -> RRTypeANY
- _ -> RRTypeError qt
+ getInt s = case reads s :: [(Int, String)] of
+ [(x, _)] -> x
+ _ -> -1
getLIp ver xs
| ver >= 2 = case xs of
x:_ -> Just x
in
case words s of
"PING":[] -> Right PdnsRequestPing
- "AXFR":x:[] -> Right (PdnsRequestAXFR x)
- "Q":qn:"IN":qt:id:rip:xs -> Right (PdnsRequestQ
+ "AXFR":x:[] -> Right (PdnsRequestAXFR (getInt x))
+ "Q":qn:"IN":qt:id:rip:xs -> case rrType qt of
+ RRTypeError e ->
+ Left $ "PDNS Request: " ++ e
+ rt ->
+ Right (PdnsRequestQ
{ qName = qn
- , qType = getQt qt
- , iD = id
+ , qType = rrType qt
+ , iD = getInt id
, remoteIpAddress = rip
, localIpAddress = getLIp ver xs
, ednsSubnetAddress = getRIp ver xs
})
_ -> Left $ "Unparseable PDNS Request: " ++ s
+-- | Produce LOG entry followed by FAIL
pdnsReport :: String -> String
-pdnsReport err =
- "LOG\tError: " ++ err ++ "\nFAIL\n"
+pdnsReport err = "LOG\tError: " ++ err ++ "\nFAIL\n"
+
+-- | Produce answer to the Q request
+pdnsOut :: Int -> Int -> String -> RRType -> Either String NmcDom -> String
+pdnsOut ver id name rrtype edom = case edom of
+ Left err ->
+ pdnsReport $ err ++ " in a " ++ (show rrtype) ++ "query for " ++ name
+ Right dom ->
+ case rrtype of
+ RRTypeANY -> foldr (\x a -> (formatRR ver id name dom x) ++ a) "END\n"
+ [RRTypeSRV, RRTypeA, RRTypeAAAA, RRTypeCNAME, RRTypeDNAME,
+ RRTypeRP, RRTypeLOC, RRTypeNS, RRTypeDS, RRTypeMX]
+ _ -> (formatRR ver id name dom rrtype) ++ "END\n"
+
+-- | Produce answer to the AXFR request
+pdnsOutXfr :: Int -> Int -> String -> Either String NmcDom -> String
+pdnsOutXfr ver id name edom = "" -- FIXME
-pdnsOut :: Int -> String -> RRType -> Either String NmcDom -> String
-pdnsOut ver id rrtype edom =
- case edom of
- Left err -> pdnsReport err
- Right dom -> pdnsAmend ver id rrtype dom "END\n"
+formatRR ver id name dom rrtype =
+ foldr (\x a -> "DATA\t" ++ v3ext ++ name ++ "\tIN\t" ++ (show rrtype)
+ ++ "\t" ++ ttl ++ "\t" ++ (show id) ++ "\t" ++ x ++ "\n" ++ a)
+ "" $ dataRR rrtype name dom
+ where
+ v3ext = case ver of
+ 3 -> "0\t1\t"
+ _ -> ""
+ ttl = show 3600
-pdnsAmend :: Int -> String -> RRType -> NmcDom -> String -> String
-pdnsAmend ver id rrtype dom accum =
- "DATA\t" ++ (show dom) ++ "\n" ++ accum --FIXME
+justl accessor _ dom = case accessor dom of
+ Nothing -> []
+ Just xs -> xs
+
+justv accessor _ dom = case accessor dom of
+ Nothing -> []
+ Just x -> [x]
+
+dotmail addr =
+ let (aname, adom) = break (== '@') addr
+ in case adom of
+ "" -> aname ++ "."
+ _ -> aname ++ "." ++ (tail adom) ++ "."
+
+dataRR RRTypeSRV = justl domSrv
+dataRR RRTypeMX = justl domMx
+dataRR RRTypeA = justl domIp
+dataRR RRTypeAAAA = justl domIp6
+dataRR RRTypeCNAME = justv domAlias
+dataRR RRTypeDNAME = justv domTranslate
+dataRR RRTypeSOA = \ name dom -> -- FIXME make realistic version field
+ let
+ ns = case domNs dom of
+ Just (x:_) -> x -- FIXME Terminate with a dot?
+ _ -> "."
+ email = case domEmail dom of
+ Nothing -> "hostmaster." ++ name ++ "."
+ Just addr -> dotmail addr
+ in
+ if dom == emptyNmcDom then []
+ else
+ -- Follows a relatively ugly hack to figure if we are at the top
+ -- level domain ("something.bit"). Only in such case we provide
+ -- the synthetic SOA RR. Otherwise yield empty.
+ -- Alternative would be to carry "top-ness" as a parameter through
+ -- all the calls from the very top where we split the fqdn.
+ case splitOn (pack ".") (pack name) of
+ [_,_] -> [ns ++ " " ++ email ++ " 99999 10800 3600 604800 86400"]
+ _ -> []
+dataRR RRTypeRP = \ _ dom ->
+ case domEmail dom of
+ Nothing -> []
+ Just addr -> [(dotmail addr) ++ " ."]
+dataRR RRTypeLOC = justv domLoc
+dataRR RRTypeNS = justl domNs -- FIXME Terminate with a dot?
+dataRR RRTypeDS = \ _ dom ->
+ case domDs dom of
+ Nothing -> []
+ Just dss -> map dsStr dss
+ where
+ dsStr x = (show (dsKeyTag x)) ++ " "
+ ++ (show (dsAlgo x)) ++ " "
+ ++ (show (dsHashType x)) ++ " "
+ ++ (dsHashValue x)
+-- This only comes into play when data arrived _not_ from a PDNS request:
+dataRR (RRTypeError e) = \ _ _ ->
+ ["; No data for bad request type " ++ e]
projects / pdns-pipe-nmc.git / blobdiff