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{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ViewPatterns #-}
module Network.Tox.Avahi
( module Network.Tox.Avahi
, NodeInfo(..)
, NodeId(..)
) where
import Data.Foldable
import GHC.Conc.Sync
import GHC.Word (Word16)
import Network.Address
import Network.Avahi
import Network.Avahi
import Network.Socket
import Network.Tox.NodeId
import Text.Read
toxServiceName :: String
toxServiceName = "_tox_dht._udp"
toxServiceDomain :: String
toxServiceDomain = "local"
(<.>) :: String -> String -> String
a <.> b = a ++ "." ++ b
toxService :: String -> PortNumber -> NodeId -> Service
toxService hostname (fromIntegral -> port) (show -> extra) =
Service {
serviceProtocol = PROTO_UNSPEC,
serviceName = "Tox DHT @ " ++ hostname,
serviceType = toxServiceName,
serviceDomain = toxServiceDomain,
serviceHost = if null hostname then "" else hostname <.> toxServiceDomain,
serviceAddress = Nothing,
servicePort = port,
serviceText = extra
}
announceToxService :: String -> PortNumber -> NodeId -> IO ThreadId
announceToxService = ((.).(.).(.)) (forkIO . announce) toxService
queryToxService :: (NodeInfo -> IO ()) -> IO ThreadId
queryToxService cb =
forkIO $
browse $
BrowseQuery
{ lookupProtocol = PROTO_UNSPEC
, lookupServiceName = toxServiceName
, lookupDomain = toxServiceDomain
, lookupCallback = runCallback
}
where
runCallback x@Service {..} = do
let nid = readMaybe serviceText
addr = readMaybe =<< serviceAddress
p = fromIntegral servicePort
forM_ nid $ \n -> forM_ addr $ \a -> cb (NodeInfo n a p)
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