2 - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan <ram@rkrishnan.org>
4 - This file is part of FuncTorrent.
6 - FuncTorrent is free software; you can redistribute it and/or modify
7 - it under the terms of the GNU General Public License as published by
8 - the Free Software Foundation; either version 3 of the License, or
9 - (at your option) any later version.
11 - FuncTorrent is distributed in the hope that it will be useful,
12 - but WITHOUT ANY WARRANTY; without even the implied warranty of
13 - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 - GNU General Public License for more details.
16 - You should have received a copy of the GNU General Public License
17 - along with FuncTorrent; if not, see <http://www.gnu.org/licenses/>
20 {-# LANGUAGE OverloadedStrings #-}
21 module FuncTorrent.Tracker
27 import Control.Concurrent(forkIO)
28 import Control.Concurrent.Chan (Chan, newChan, readChan, writeChan)
29 import Control.Concurrent.MVar (newEmptyMVar, putMVar, readMVar)
30 import Control.Monad.State (StateT, liftIO, get, runStateT)
31 import Control.Monad (forever)
32 import Data.ByteString.Char8 (ByteString, pack, unpack)
33 import Data.List (isPrefixOf)
34 import Network (PortNumber)
36 import qualified FuncTorrent.Tracker.Http as HT (trackerLoop)
37 import qualified FuncTorrent.Tracker.Udp as UT (trackerLoop)
38 import FuncTorrent.Tracker.Types (TState(..), TrackerEventState(..), TrackerProtocol(..), TrackerMsg(..))
39 import FuncTorrent.Utils (Port, toPort)
40 import qualified FuncTorrent.FileSystem as FS (MsgChannel)
41 import FuncTorrent.Peer (Peer)
43 type MsgChannel = Chan TrackerMsg
45 data TrackerUrl = TrackerUrl { protocol :: TrackerProtocol
51 newTracker :: IO MsgChannel
54 parseUrl :: String -> TrackerUrl
55 parseUrl url = TrackerUrl proto host port path
56 where proto = getTrackerType url
57 host = getHostname url
61 getTrackerType :: String -> TrackerProtocol
62 getTrackerType url | isPrefixOf "http://" url = Http
63 | isPrefixOf "udp://" url = Udp
64 | otherwise = UnknownProtocol
66 getHostname :: String -> String
67 getHostname url = takeWhile (/= ':') $ drop 2 $ dropWhile (/= '/') url
69 getPort :: String -> Port
70 getPort url = toPort . pack $ takeWhile (/= '/') $ drop 1 $ dropWhile (/= ':') $ drop 2 $ dropWhile (/= '/') url
72 getPath :: String -> String
73 getPath url = dropWhile (/= '/') $ dropWhile (/= ':') $ drop 1 $ dropWhile (/= ':') url
75 runTracker :: MsgChannel -> FS.MsgChannel -> ByteString -> PortNumber
76 -> String -> [String] -> Integer -> IO ()
77 runTracker msgChannel fsChan infohash port peerId announceList sz = do
79 let initialTState = TState { currentState = None
82 turl = head announceList
83 host = getHostname turl
84 case getTrackerType turl of
86 _ <- forkIO $ HT.trackerLoop host port peerId infohash fsChan initialTState
87 runStateT (msgHandler msgChannel) initialTState
90 _ <- forkIO $ UT.trackerLoop host (fromIntegral port) peerId infohash fsChan initialTState
93 error "Tracker Protocol unimplemented"
95 msgHandler :: MsgChannel -> StateT TState IO ()
96 msgHandler c = forever $ do
98 peers <- liftIO $ readMVar (connectedPeers st)
100 liftIO $ sendResponse msg peers
103 sendResponse msg peers =
105 GetConnectedPeersMsg var -> do
108 putStrLn "Unhandled Tracker Msg"
110 getConnectedPeers :: MsgChannel -> IO [Peer]
111 getConnectedPeers c = do
113 writeChan c (GetConnectedPeersMsg v)