diff options
Diffstat (limited to 'Utility/SRV.hs')
| -rw-r--r-- | Utility/SRV.hs | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/Utility/SRV.hs b/Utility/SRV.hs index c30c8bd86..38ac28787 100644 --- a/Utility/SRV.hs +++ b/Utility/SRV.hs @@ -11,6 +11,8 @@ {-# LANGUAGE CPP #-} module Utility.SRV ( + mkSRVTcp, + mkSRV, lookupSRV, ) where @@ -30,12 +32,21 @@ import ADNS.Resolver import Data.Either #endif +newtype SRV = SRV String + type HostPort = (HostName, PortID) +mkSRV :: String -> String -> HostName -> SRV +mkSRV transport protocol host = SRV $ concat + ["_", protocol, ".", transport, ".", host] + +mkSRVTcp :: String -> HostName -> SRV +mkSRVTcp = mkSRV "tcp" + {- Returns an ordered list, with highest priority hosts first. - - On error, returns an empty list. -} -lookupSRV :: HostName -> IO [HostPort] +lookupSRV :: SRV -> IO [HostPort] #ifdef WITH_ADNS lookupSRV srv = initResolver [] $ \resolver -> do r <- catchDefaultIO (Right []) $ @@ -45,8 +56,8 @@ lookupSRV srv = initResolver [] $ \resolver -> do lookupSRV = lookupSRVHost #endif -lookupSRVHost :: HostName -> IO [HostPort] -lookupSRVHost srv +lookupSRVHost :: SRV -> IO [HostPort] +lookupSRVHost (SRV srv) | Build.SysConfig.host = catchDefaultIO [] $ parseSrvHost <$> readProcessEnv "host" ["-t", "SRV", "--", srv] -- clear environment, to avoid LANG affecting output |