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{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE OverloadedStrings #-}
module Network.BitTorrent.Discovery
(discover, startListener, startDHT
) where
import Control.Monad
import Control.Concurrent
import Control.Exception
import Network.Socket
import Data.Torrent
import Network.BitTorrent.Peer
import Network.BitTorrent.Internal
import Network.BitTorrent.Exchange
import Network.BitTorrent.Tracker
import Network.BitTorrent.DHT
-- discover should hide tracker and DHT communication under the hood
-- thus we can obtain an unified interface
discover :: SwarmSession -> P2P () -> IO ()
discover swarm @ SwarmSession {..} action = {-# SCC discover #-} do
port <- listenerPort clientSession
let conn = TConnection {
tconnAnnounce = tAnnounce torrentMeta
, tconnInfoHash = tInfoHash torrentMeta
, tconnPeerId = clientPeerId clientSession
, tconnPort = port
}
progress <- getCurrentProgress clientSession
withTracker progress conn $ \tses -> do
forever $ do
addr <- getPeerAddr tses
spawnP2P swarm addr $ do
action
startListener :: ClientSession -> PortNumber -> IO ()
startListener cs @ ClientSession {..} port =
putMVar peerListener =<< startService port (listener cs (error "listener"))
startDHT :: ClientSession -> PortNumber -> IO ()
startDHT ClientSession {..} nodePort = do
maybe failure start =<< tryTakeMVar peerListener
where
start ClientService {..} = do
ses <- newNodeSession servPort
serv <- startService nodePort (dhtServer ses)
putMVar nodeListener serv
failure = throwIO $ userError msg
msg = "unable to start DHT server: peer listener is not running"
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