X-Git-Url: http://www.average.org/gitweb/?p=pdns-pipe-nmc.git;a=blobdiff_plain;f=PowerDns.hs;h=76d0b029070f213b0d40f18cdc5e370993eae75c;hp=1c1e420c6e13c0c61d25e1dc98537933f802bad0;hb=f728855c4380a2169a9dc98f52818052db22e031;hpb=1ee19d546701efde4b4b2f2f70bedae907a5266d diff --git a/PowerDns.hs b/PowerDns.hs index 1c1e420..76d0b02 100644 --- a/PowerDns.hs +++ b/PowerDns.hs @@ -1,44 +1,70 @@ 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 @@ -52,19 +78,111 @@ pdnsParse ver s = 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 -pdnsOut :: Int -> RRType -> Either String NmcDom -> String -pdnsOut ver rrtype edom = - case edom of - Left err -> "LOG Error: " ++ err ++ "\nFAIL\n" - Right dom -> "DATA\n" ++ (show dom) ++ "\nEND\n" --FIXME +-- | Produce LOG entry followed by FAIL +pdnsReport :: String -> String +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 = + let + rrl = case rrtype of + RRTypeANY -> [RRTypeSRV, RRTypeA, RRTypeAAAA, RRTypeCNAME + , RRTypeDNAME, RRTypeRP, RRTypeLOC, RRTypeNS + , RRTypeDS, RRTypeMX] + rrt -> [rrt] + in + (formatDom ver id name rrl edom) ++ "END\n" + +-- | Produce answer to the AXFR request +pdnsOutXfr :: Int -> Int -> String -> Either String NmcDom -> String +pdnsOutXfr ver id name edom = "" -- FIXME + +formatDom ver id name rrl edom = case edom of + Left err -> + pdnsReport $ err ++ " in the " ++ (show rrl) ++ " query for " ++ name + Right dom -> + foldr (\x a -> (formatRR ver id name dom x) ++ a) "" rrl + +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 + +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]