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{-# OPTIONS_GHC -Wall #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ViewPatterns #-}
module Network.Tox.Avahi
( module Network.Tox.Avahi
, NodeInfo(..)
, NodeId
) where
import Control.Applicative
import Data.Foldable
import Network.Address
import Network.Avahi
import Network.BSD (getHostName)
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 -> (Maybe NodeId) -> Service
toxService hostname (fromIntegral -> port) dhtkey toxid =
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 = maybe (show dhtkey) (show . ((,) dhtkey)) toxid
}
announceToxServiceWithHostname :: String -> PortNumber -> NodeId -> (Maybe NodeId) -> IO ()
announceToxServiceWithHostname = (boobs.boobs) announce toxService
where boobs = ((.).(.))
announceToxService :: PortNumber -> NodeId -> (Maybe NodeId) -> IO ()
announceToxService a b c = do
h <- getHostName
announceToxServiceWithHostname h a b c
queryToxService :: (NodeInfo -> Maybe NodeId -> IO ()) -> IO ()
queryToxService cb =
browse $
BrowseQuery
{ lookupProtocol = PROTO_UNSPEC
, lookupServiceName = toxServiceName
, lookupDomain = toxServiceDomain
, lookupCallback = runCallback
}
where
runCallback Service {..} = do
let both :: Maybe (NodeId, NodeId)
both = readMaybe serviceText
nid = (fst <$> both) <|> readMaybe serviceText
addr = readMaybe =<< serviceAddress
p = fromIntegral servicePort
forM_ nid $ \n -> forM_ addr $ \a -> cb (NodeInfo n a p) (snd <$> both)
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