{-# LANGUAGE OverloadedStrings #-}
+{-
+Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan <ram@rkrishnan.org>
+
+This file is part of FuncTorrent.
+
+FuncTorrent is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+(at your option) any later version.
+
+FuncTorrent is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with FuncTorrent; if not, see <http://www.gnu.org/licenses/>
+-}
+
module Main where
-import Prelude hiding (log, length, readFile, getContents)
-import Data.ByteString.Char8 (ByteString, getContents, readFile, unpack)
-import System.Environment (getArgs)
-import System.Exit (exitSuccess)
-import System.Directory (doesFileExist)
+import Prelude hiding (log, length, readFile, getContents)
-import FuncTorrent.Logger (initLogger, logMessage, logStop)
-import FuncTorrent.Metainfo (Info(..), Metainfo(..), torrentToMetainfo)
-import FuncTorrent.Peer (handlePeerMsgs)
-import FuncTorrent.Tracker (peers, getTrackerResponse)
+import Control.Concurrent (forkIO, killThread)
+import Control.Concurrent.MVar (readMVar)
+import Data.ByteString.Char8 (ByteString, getContents, readFile)
+import qualified FuncTorrent.FileSystem as FS (createMsgChannel, pieceMapFromFile, run)
+import FuncTorrent.Logger (initLogger, logMessage, logStop)
+import FuncTorrent.Metainfo (Info(..), Metainfo(..), torrentToMetainfo)
+import FuncTorrent.Peer (handlePeerMsgs)
+import FuncTorrent.PieceManager (initPieceMap)
+import qualified FuncTorrent.Server as Server
+import FuncTorrent.Tracker (runTracker, getConnectedPeers, newTracker)
+import Network (PortID (PortNumber))
+import System.IO (withFile, IOMode (ReadWriteMode))
+import System.Directory (doesFileExist)
+import System.Environment (getArgs)
+import System.Exit (exitSuccess)
+import System.Random (getStdGen, randomRs)
logError :: String -> (String -> IO ()) -> IO ()
logError e logMsg = logMsg $ "parse error: \n" ++ e
-peerId :: String
-peerId = "-HS0001-*-*-20150215"
-
exit :: IO ByteString
exit = exitSuccess
-usage :: IO ()
-usage = putStrLn "usage: functorrent torrent-file"
+usage :: String
+usage = "usage: functorrent torrent-file"
parse :: [String] -> IO ByteString
parse [] = getContents
else error "file does not exist"
parse _ = exit
+-- peer id is exactly 20 bytes long.
+-- peer id starts with '-', followed by 2 char client id'
+-- followed by 4 ascii digits for version number, followed by
+-- a '-'. Rest are random digits to fill the 20 bytes.
+mkPeerID :: IO String
+mkPeerID = do
+ stdgen <- getStdGen
+ let digits = randomRs (0, 9) stdgen :: [Integer]
+ return $ "-HS9001-" ++ (concatMap show $ take (20 - 8) digits)
+
main :: IO ()
main = do
args <- getArgs
logR <- initLogger
+ peerId <- mkPeerID
let log = logMessage logR
- log "Starting up functorrent"
- log $ "Parsing arguments " ++ concat args
- torrentStr <- parse args
- case torrentToMetainfo torrentStr of
- Left e -> logError e log
- Right m -> do
- log "Input File OK"
- log $ "Downloading file : " ++ name (info m)
- log "Trying to fetch peers"
-
- log $ "Trackers: " ++ head (announceList m)
- trackerResp <- getTrackerResponse peerId m
- case trackerResp of
- Left e -> log $ "Error" ++ unpack e
- Right peerList -> do
- log $ "Peers List : " ++ (show . peers $ peerList)
- let p1 = head (peers peerList)
- handlePeerMsgs p1 peerId m
- logStop logR
+ case args of
+ [] -> do
+ log usage
+ _ -> do
+ log "Starting up functorrent"
+ log $ "Parsing arguments " ++ concat args
+ torrentStr <- parse args
+ case torrentToMetainfo torrentStr of
+ Left e -> logError e log
+ Right m -> do
+ -- if we had downloaded the file before (partly or completely)
+ -- then we should check the current directory for the existence
+ -- of the file and then update the map of each piece' availability.
+ -- This can be done by reading each piece and verifying the checksum.
+ -- If the checksum does not match, we don't have that piece.
+ let filePath = name (info m) -- really this is just the file name, not file path
+ fileLen = lengthInBytes (info m)
+ pieceHash = pieces (info m)
+ pLen = pieceLength (info m)
+ infohash = infoHash m
+ defaultPieceMap = initPieceMap pieceHash fileLen pLen
+ log $ "create FS msg channel"
+ fsMsgChannel <- FS.createMsgChannel
+ log $ "Downloading file : " ++ filePath
+ pieceMap <- FS.pieceMapFromFile filePath fileLen defaultPieceMap
+ log $ "start filesystem manager thread"
+ fsTid <- forkIO $ withFile filePath ReadWriteMode (FS.run pieceMap fsMsgChannel)
+ log $ "starting server"
+ (serverSock, (PortNumber portnum)) <- Server.start
+ log $ "server started on " ++ show portnum
+ log "Trying to fetch peers"
+ _ <- forkIO $ Server.run serverSock peerId m pieceMap fsMsgChannel
+ log $ "Trackers: " ++ head (announceList m)
+ trackerMsgChan <- newTracker
+ _ <- forkIO $ runTracker trackerMsgChan fsMsgChannel infohash portnum peerId (announceList m) fileLen
+ ps <- getConnectedPeers trackerMsgChan
+ log $ "Peers List : " ++ (show ps)
+ let p1 = head ps
+ handlePeerMsgs p1 peerId m pieceMap True fsMsgChannel
+ logStop logR
+ killThread fsTid
projects / functorrent.git / blobdiff