From: Ramakrishnan Muthukrishnan Date: Sun, 17 Jul 2016 04:08:50 +0000 (+0530) Subject: starting with a clean slate X-Git-Url: https://git.rkrishnan.org/%5B/%5D%20/file/URI:LIT:krugkidfnzsc4/frontends/(%5B%5E?a=commitdiff_plain;h=ad1587e61564e6a677fa9000daaf209b0c95a5b4;p=functorrent.git starting with a clean slate --- diff --git a/AUTHORS b/AUTHORS deleted file mode 100644 index 4dc8f3b..0000000 --- a/AUTHORS +++ /dev/null @@ -1,5 +0,0 @@ -In alphabetic order of the first name: - -Abhiranjan Kumar -Jaseem Abid -Ramakrishnan Muthukrishnan diff --git a/COPYING b/COPYING deleted file mode 100644 index 45644ff..0000000 --- a/COPYING +++ /dev/null @@ -1,674 +0,0 @@ - GNU GENERAL PUBLIC LICENSE - Version 3, 29 June 2007 - - Copyright (C) 2007 Free Software Foundation, Inc. - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The GNU General Public License is a free, copyleft license for -software and other kinds of works. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. 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If your program is a subroutine library, you -may consider it more useful to permit linking proprietary applications with -the library. If this is what you want to do, use the GNU Lesser General -Public License instead of this License. But first, please read -. diff --git a/README.md b/README.md deleted file mode 100644 index 457a754..0000000 --- a/README.md +++ /dev/null @@ -1,67 +0,0 @@ -# A command line BitTorrent client. - -I started writing a BitTorrent client because it seemed like fun -and I am learning Haskell and wanted to see if I can write something -real with Haskell than just heat the room. It is turning out to be a -lot of fun. - -### Building - -You need to install [Stack](https://github.com/commercialhaskell/stack), either via -the OS package manager or via `cabal` (`cabal install stack`). - - $ git clone https://github.com/vu3rdd/functorrent && cd functorrent - $ cabal install stack # or install stack by other means - $ stack build # binaries in $(pwd)/.stack-work/install/x86..../lts-2.16/7.8.4/bin/functorrent - -### Usage - -If you invoke functorrent without any options, it expects the contents of a torrent file -to be given in stdin. So - - $ cat ubuntu-14.10-desktop-amd64.iso.torrent | functorrent - [....] - -Or one can explicitly specify the torrent file as input. - - $ functorrent ubuntu-14.10-desktop-amd64.iso.torrent - [...] - -### Goals - -- [Optimized for Fun](http://www.slideshare.net/autang/ofun-optimizing-for-fun). - (should have called it "funtorrent") -- Become more profient with Haskell. -- Implement something non-trivial with Haskell (crypto, file operations, network - operations, concurrency, bit twiddling, DHT). -- Follow the spec ([official spec](http://bittorrent.org/beps/bep_0003.html), [unofficial spec](https://wiki.theory.org/BitTorrentSpecification)) -- Easy for newbies like me to read and understand alongside the spec. -- doctest and quickcheck tests. -- Follow Haskell Style Guide - https://github.com/tibbe/haskell-style-guide/blob/master/haskell-style.md - -### WARNING - -This client is not usable as your daily BitTorrent client yet. You may get -corrupted files and end up wasting a lot of bandwidth. So, until we achieve -some robustness, consider this as a programmer-friendly project to learn -about a bunch of stuff. - -### Current Status - -- most of the peer wire protocol works. -- talks only to one peer at the moment. -- can download files. But needs every piece to be served by the peer it connected to. -- can talk to http/udp trackers. - -### TODO - -- Test suite. -- Talk to multiple peers concurrently. -- Piece download algorithms. -- Multifile torrent support. -- Magnet link support. -- other advanced features of BitTorrent (like DHT). - -### Misc - -The Bangalore Haskell group forked an early version of this code and started to develop it as a group. My code has diverged a lot from it. Both are calling it functorrent. Perhaps that needs to be fixed. diff --git a/Setup.hs b/Setup.hs deleted file mode 100644 index 9a994af..0000000 --- a/Setup.hs +++ /dev/null @@ -1,2 +0,0 @@ -import Distribution.Simple -main = defaultMain diff --git a/data/The.Flash.2014.S01E14.HDTV.x264-LOL.mp4.127fc6b23a3dc168.torrent b/data/The.Flash.2014.S01E14.HDTV.x264-LOL.mp4.127fc6b23a3dc168.torrent deleted file mode 100644 index fac643a..0000000 Binary files a/data/The.Flash.2014.S01E14.HDTV.x264-LOL.mp4.127fc6b23a3dc168.torrent and /dev/null differ diff --git a/data/debian-7.8.0-amd64-CD-1.iso.cache b/data/debian-7.8.0-amd64-CD-1.iso.cache deleted file mode 100644 index 9086a9d..0000000 --- a/data/debian-7.8.0-amd64-CD-1.iso.cache +++ /dev/null @@ -1,3 +0,0 @@ -d8:intervali900e5:peers300:UÉeÈÕ%;ìVÎL•+ʚ·!Í©ËÕÒxVkXÕïØÍ[À£˜.:>ÒðAWTúg¡%XÃñÀÈÕX¥=ßáVêóè¿Õ)‰òÈÕ[ -T÷]@8ù·oÊ>Gê+~záØD©…HÄ.߇a±å½¦]vûËȔmÈÕmâì ­œN:‹šY"¼ô/ºšÛËVÌoÌ»Pn(bD»ŽÙãðGs‹´öYF©#­ÈÕ¹‡º*‰XÆàÊÈÕ·AÙ#ÛWû½–¶XWrÊ®0i]:ÈÓYf E'<^ŸÞ=§_1°åªÙr:‡áO¢&‹Þˆ©2H֏»C¼—ÈÕOoÚ2ф>K‰ÈÕÌœ-PO¢"_ÓRÀöèÔ"ç -PÌ_áöÝÈÕ|)ífa*6:peers60:e \ No newline at end of file diff --git a/data/debian-7.8.0-amd64-CD-1.iso.error b/data/debian-7.8.0-amd64-CD-1.iso.error deleted file mode 100644 index c19b09a..0000000 --- a/data/debian-7.8.0-amd64-CD-1.iso.error +++ /dev/null @@ -1 +0,0 @@ -d14:failure reason17:torrent not founde \ No newline at end of file diff --git a/data/debian-7.8.0-amd64-CD-1.iso.torrent b/data/debian-7.8.0-amd64-CD-1.iso.torrent deleted file mode 100644 index 7a3c0a0..0000000 Binary files a/data/debian-7.8.0-amd64-CD-1.iso.torrent and /dev/null differ diff --git a/data/debian-8.2.0-amd64-CD-1.iso.torrent b/data/debian-8.2.0-amd64-CD-1.iso.torrent deleted file mode 100644 index ea0ab8c..0000000 Binary files a/data/debian-8.2.0-amd64-CD-1.iso.torrent and /dev/null differ diff --git a/data/hello.txt b/data/hello.txt deleted file mode 100644 index 3b18e51..0000000 --- a/data/hello.txt +++ /dev/null @@ -1 +0,0 @@ -hello world diff --git a/data/hello.txt.cache b/data/hello.txt.cache deleted file mode 100644 index 8b51ab7..0000000 --- a/data/hello.txt.cache +++ /dev/null @@ -1 +0,0 @@ -d8:completei0e10:incompletei0e8:intervali130e12:min intervali130e5:peers0:e diff --git a/data/hello.txt.torrent b/data/hello.txt.torrent deleted file mode 100644 index f9c4bdd..0000000 --- a/data/hello.txt.torrent +++ /dev/null @@ -1 +0,0 @@ -d8:announce32:http://9.rarbg.com:2710/announce7:comment11:hello world10:created by11:Jaseem Abid13:creation datei1428717851e8:encoding5:UTF-84:infod6:lengthi12e4:name9:hello.txt12:piece lengthi32768e6:pieces20:"Ycc³Þ@°o˜¸]‚1.ŒÕ7:privatei0eee \ No newline at end of file diff --git a/data/ubuntu-14.10-desktop-amd64.iso.torrent b/data/ubuntu-14.10-desktop-amd64.iso.torrent deleted file mode 100644 index d38a2f6..0000000 Binary files a/data/ubuntu-14.10-desktop-amd64.iso.torrent and /dev/null differ diff --git a/data/ubuntu-14.10-desktop-i386.iso.torrent b/data/ubuntu-14.10-desktop-i386.iso.torrent deleted file mode 100644 index 7e453ce..0000000 Binary files a/data/ubuntu-14.10-desktop-i386.iso.torrent and /dev/null differ diff --git a/data/ubuntu-15.10-desktop-amd64.iso.torrent b/data/ubuntu-15.10-desktop-amd64.iso.torrent deleted file mode 100644 index 5a006d1..0000000 Binary files a/data/ubuntu-15.10-desktop-amd64.iso.torrent and /dev/null differ diff --git a/data/ubuntu-16.04-desktop-amd64.iso.torrent b/data/ubuntu-16.04-desktop-amd64.iso.torrent deleted file mode 100644 index 1d2e0cb..0000000 Binary files a/data/ubuntu-16.04-desktop-amd64.iso.torrent and /dev/null differ diff --git a/doc/design.md b/doc/design.md deleted file mode 100644 index e5dbd9d..0000000 --- a/doc/design.md +++ /dev/null @@ -1,53 +0,0 @@ -2016-03-10: - -A rough sketch of the design of the program. - -In the Unix tradition, FuncTorrent takes either a .torrent file as input or one -can `cat' the .torrent file and pipe the output into the program: - -$ cat foo.torrent | ./functorrent - -As of 10/Mar/2016, FuncTorrent supports only HTTP tracker. - -Each module starts up as a thread, so we have FileSystem thread, we have a Tracker -Client thread. We have a main client thread, that receives pieces. We also have a -Server thread that serves pieces. - -The messages themselves are not exposed outside the module. Instead, a function that -create a message passing channel is exposed and also helper functions that talk via -the channel to the module are also exposed. So, it is the duty of the Module to expose -relevant functions that sends/receives messages. - -Tracker -------- - -Tracker module has two submodules: one for Http and another for Udp. UDP one is not -ready yet. So, let us talk about http. The tracker module would take care of dispatching -to the apropriate module (udp or http) depending on the tracker server url that we -decode from the .torrent file. The Tracker currently takes two messages: one to get the -tracker status (tracker url could be defunct and could time out or the tracker server -may return a genuine error response, which is captured in a bytestring). The module -has an 'newTracker' function, that just creates a new channel. It also has a 'runTracker' -function that takes the above created channel and a bunch of parameters including the -FileSystem channel (since FileSystem module is the 'owner' of the bytes read/write -statistics). It then spawns a thread that talks to the tracker server and the rest of -the function is a loop which is looking for and handling messages on the msg channel. - -Tracker messages are defined in Tracker/Types.hs - -data TrackerMsg = GetStatusMsg TrackerEventState - | GetConnectedPeersMsg (MVar [Peer]) - -i.e. There are two messages. GetStatusMsg is to get the current state of the TrackerClient (us) -to Tracker Server communication. TrackerEventState is also defined in Tracker/Types.hs as - -data TrackerEventState = None - | Started - | Completed - | Error ByteString - deriving (Show, Eq) - -In particular, the Error EventState signifies any possible error signalled by the -server, based on which, the user of the Tracker module can take some action. - -So, once started, diff --git a/functorrent.cabal b/functorrent.cabal deleted file mode 100644 index 3de1ebf..0000000 --- a/functorrent.cabal +++ /dev/null @@ -1,94 +0,0 @@ --- Initial functorrent.cabal generated by cabal init. For further documentation, --- see http://haskell.org/cabal/users-guide/ - -name: functorrent -version: 0.2.0 -synopsis: A Bit-torrent client -description: A bittorrent client -license: GPL-3 -license-file: COPYING -author: Ramakrishnan Muthukrishnan -maintainer: ram@rkrishnan.org --- copyright: -category: Network -build-type: Simple -extra-source-files: README.md -cabal-version: >=1.18 - -library - exposed-modules: FuncTorrent.Bencode, - FuncTorrent.FileSystem, - FuncTorrent.Logger, - FuncTorrent.Metainfo, - FuncTorrent.Network - FuncTorrent.Peer, - FuncTorrent.PeerMsgs, - FuncTorrent.PieceManager, - FuncTorrent.Server, - FuncTorrent.Tracker, - FuncTorrent.Tracker.Http, - FuncTorrent.Tracker.Types, - FuncTorrent.Tracker.Udp, - FuncTorrent.Utils - - other-extensions: OverloadedStrings - hs-source-dirs: src - ghc-options: -Wall -fwarn-incomplete-patterns -fno-warn-orphans - default-language: Haskell2010 - build-depends: base, - base16-bytestring, - binary, - bytestring, - containers, - cryptohash, - directory, - HTTP, - mtl, - network, - network-uri, - parsec, - QuickCheck, - random, - safe, - transformers - -executable functorrent - main-is: Main.hs - other-extensions: OverloadedStrings - hs-source-dirs: src/main - ghc-options: -Wall -fwarn-incomplete-patterns -optc-Os -fno-warn-orphans - default-language: Haskell2010 - build-depends: base, - base16-bytestring, - binary, - bytestring, - containers, - cryptohash, - directory, - functorrent, - HTTP, - mtl, - network, - network-uri, - QuickCheck, - random, - safe - -test-suite functorrent-test - type: exitcode-stdio-1.0 - default-language: Haskell2010 - hs-source-dirs: test - main-is: Test.hs - other-modules: BencodeTests - build-depends: base, - functorrent, - bytestring, - containers, - directory, - doctest, - QuickCheck, - tasty, - tasty-hunit, - QuickCheck, - tasty-quickcheck, - test-framework-quickcheck2 diff --git a/src/FuncTorrent/Bencode.hs b/src/FuncTorrent/Bencode.hs deleted file mode 100644 index f359465..0000000 --- a/src/FuncTorrent/Bencode.hs +++ /dev/null @@ -1,198 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} -module FuncTorrent.Bencode - (BVal(..) - , bValToBList - , bValToBytestr - , bValToInfoDict - , bValToInteger - , bstrToString - , decode - , encode - ) where - -import Prelude hiding (length, concat) - -import Data.ByteString (ByteString, length, concat) -import Data.ByteString.Char8 (unpack, pack) -import Data.Map.Strict (Map, fromList, toList) -import Text.ParserCombinators.Parsec -import qualified Text.Parsec.ByteString as ParsecBS -import Test.QuickCheck - -data BVal = Bint Integer - | Bstr ByteString - | Blist [BVal] - | Bdict (Map String BVal) - deriving (Ord, Eq, Show) - -instance Arbitrary ByteString where - arbitrary = pack <$> arbitrary - -instance Arbitrary BVal where - arbitrary = sized bval - where - bval :: Int -> Gen BVal - bval 0 = oneof [ Bint <$> arbitrary - , Bstr <$> arbitrary] - bval n = oneof [ Bint <$> arbitrary - , Bstr <$> arbitrary - , Blist <$> vectorOf n (bval (n `div` 4)) - , do keys <- vectorOf n arbitrary - vals <- vectorOf n (bval (n `div` 4)) - return $ Bdict $ fromList $ zip keys vals ] - --- getters -bValToInteger :: BVal -> Maybe Integer -bValToInteger (Bint x) = Just x -bValToInteger _ = Nothing - -bValToBytestr :: BVal -> Maybe ByteString -bValToBytestr (Bstr bs) = Just bs -bValToBytestr _ = Nothing - -bValToBList :: BVal -> Maybe [BVal] -bValToBList (Blist lst) = Just lst -bValToBList _ = Nothing - -bValToInfoDict :: BVal -> Maybe (Map String BVal) -bValToInfoDict (Bdict dict) = Just dict -bValToInfoDict _ = Nothing - -bstrToString :: BVal -> Maybe String -bstrToString bval = unpack <$> bValToBytestr bval - --- $setup --- >>> import Data.Either - --- | parse strings --- --- >>> parse bencStr "Bstr" (pack "4:spam") --- Right "spam" --- >>> parse bencStr "Bstr" (pack "0:") --- Right "" --- >>> parse bencStr "Bstr" (pack "0:hello") --- Right "" --- -bencStr :: ParsecBS.Parser ByteString -bencStr = do ds <- many1 digit <* char ':' - s <- count (read ds) anyChar - return (pack s) - --- | parse integers --- --- >>> parse bencInt "Bint" (pack "i42e") --- Right 42 --- >>> parse bencInt "Bint" (pack "i123e") --- Right 123 --- >>> parse bencInt "Bint" (pack "i1e") --- Right 1 --- >>> parse bencInt "Bint" (pack "i0e") --- Right 0 --- >>> parse bencInt "Bint" (pack "i-1e") --- Right (-1) --- >>> isLeft $ parse bencInt "Bint" (pack "i01e") --- True --- >>> isLeft $ parse bencInt "Bint" (pack "i00e") --- True --- >>> isLeft $ parse bencInt "Bint" (pack "i002e") --- True -bencInt :: ParsecBS.Parser Integer -bencInt = do ds <- between (char 'i') (char 'e') numbers - return (read ds) - where numbers = do d' <- char '-' <|> digit - ds' <- many digit - parseNumber d' ds' - parseNumber '0' [] = return "0" - parseNumber '0' _ = unexpected "numbers cannot be left-padded with zeros" - parseNumber '-' [] = unexpected "sign without any digits" - parseNumber '-' (d'':_) | d'' == '0' = unexpected "numbers cannot be left-padded with zeros" - parseNumber d'' ds'' = return (d'':ds'') - --- | parse lists --- --- >>> parse bencList "Blist" (pack "le") --- Right [] --- >>> parse bencList "Blist" (pack "l4:spam4:eggse") --- Right [Bstr "spam",Bstr "eggs"] --- >>> parse bencList "Blist" (pack "l4:spami42ee") --- Right [Bstr "spam",Bint 42] --- >>> parse bencList "Blist" (pack "l4:spam4:eggsli42eee") --- Right [Bstr "spam",Bstr "eggs",Blist [Bint 42]] -bencList :: ParsecBS.Parser [BVal] -bencList = between (char 'l') (char 'e') (many bencVal) - --- | parse dict --- --- >>> parse bencDict "Bdict" (pack "de") --- Right (fromList []) --- >>> parse bencDict "Bdict" (pack "d3:cow3:moo4:spam4:eggse") --- Right (fromList [("cow",Bstr "moo"),("spam",Bstr "eggs")]) --- >>> parse bencDict "Bdict" (pack "d4:spaml1:a1:bee") --- Right (fromList [("spam",Blist [Bstr "a",Bstr "b"])]) --- >>> parse bencDict "Bdict" (pack "d9:publisher3:bob17:publisher-webpage15:www.example.com18:publisher.location4:homee") --- Right (fromList [("publisher",Bstr "bob"),("publisher-webpage",Bstr "www.example.com"),("publisher.location",Bstr "home")]) -bencDict :: ParsecBS.Parser (Map String BVal) -bencDict = between (char 'd') (char 'e') $ fromList <$> many kvpair - where kvpair = do k <- bencStr - v <- bencVal - return (unpack k, v) - -bencVal :: ParsecBS.Parser BVal -bencVal = Bstr <$> bencStr <|> - Bint <$> bencInt <|> - Blist <$> bencList <|> - Bdict <$> bencDict - -decode :: ByteString -> Either ParseError BVal -decode = parse bencVal "BVal" - --- Encode BVal into a bencoded ByteString. Inverse of decode - --- TODO: Use builders and lazy byte string to get O(1) concatenation over O(n) --- provided by lists. - --- TODO: encode . decode pair might be a good candidate for Quickcheck. --- | encode bencoded-values --- --- >>> encode (Bstr (pack "")) --- "0:" --- >>> encode (Bstr (pack "spam")) --- "4:spam" --- >>> encode (Bint 0) --- "i0e" --- >>> encode (Bint 42) --- "i42e" --- >>> encode (Blist [(Bstr (pack "spam")), (Bstr (pack "eggs"))]) --- "l4:spam4:eggse" --- >>> encode (Blist []) --- "le" --- >>> encode (Bdict (fromList [("spam", Bstr $ pack "eggs")])) --- "d4:spam4:eggse" -encode :: BVal -> ByteString -encode (Bstr bs) = pack $ show (length bs) ++ ":" ++ unpack bs -encode (Bint i) = pack $ "i" ++ show i ++ "e" -encode (Blist xs) = concat ["l", concat $ map encode xs, "e"] -encode (Bdict d) = concat ["d", concat kvlist, "e"] - where - kvlist :: [ByteString] - kvlist = [encPair kv | kv <- toList d] - encPair (k, v) = concat [encode . Bstr . pack $ k, encode v] diff --git a/src/FuncTorrent/FileSystem.hs b/src/FuncTorrent/FileSystem.hs deleted file mode 100644 index 7c95c1e..0000000 --- a/src/FuncTorrent/FileSystem.hs +++ /dev/null @@ -1,131 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} -{-# LANGUAGE FlexibleContexts #-} - -module FuncTorrent.FileSystem - (run, - MsgChannel, - createMsgChannel, - writePieceToDisk, - Piece(..), - pieceMapFromFile, - Stats(..), - getStats - ) - where - -import Control.Concurrent.Chan (Chan, newChan, readChan, writeChan) -import Control.Concurrent.MVar (MVar, newEmptyMVar, putMVar) -import Control.Monad (forever) -import Control.Monad.State (StateT, liftIO, get, runStateT, modify) -import qualified Data.ByteString as BS -import Data.Map (traverseWithKey, (!)) -import System.IO (Handle, IOMode (ReadWriteMode), withFile) -import System.Directory (doesFileExist) - -import FuncTorrent.PieceManager (PieceDlState(..), PieceData(..), PieceMap, pieceNumToOffset) -import FuncTorrent.Utils (createDummyFile, readFileAtOffset, writeFileAtOffset, verifyHash) - -type PieceNum = Integer -data Piece = Piece PieceNum BS.ByteString - -data Msg = ReadPiece PieceNum Integer (MVar Piece) - | WritePiece Piece - | VerifyPiece PieceNum (MVar Bool) - | GetStats (MVar Stats) - -type MsgChannel = Chan Msg - -data Stats = Stats { bytesRead :: Integer - , bytesWritten :: Integer - } - -createMsgChannel :: IO (Chan Msg) -createMsgChannel = newChan - -run :: PieceMap -> MsgChannel -> Handle -> IO () -run pieceMap c handle = forever $ do - _ <- runStateT (run' pieceMap c handle) initialStats - return () - where initialStats = Stats { bytesRead = 0 - , bytesWritten = 0 } - -run' :: PieceMap -> MsgChannel -> Handle -> StateT Stats IO () -run' pieceMap c handle = do - stats <- get - msg <- liftIO recvMsg - liftIO $ sendResponse msg stats - updateStats msg - where - recvMsg = readChan c - sendResponse msg stats = - case msg of - ReadPiece n len' var -> do - bs <- readPiece n len' - putMVar var (Piece n bs) - WritePiece (Piece n bs) -> - writePiece n bs - VerifyPiece n var -> do - isHashValid <- verifyPiece n - putMVar var isHashValid - GetStats var -> - putMVar var stats - readPiece n len' = do - let offset = pieceNumToOffset pieceMap n - readFileAtOffset handle offset len' - writePiece n piece = do - let offset = pieceNumToOffset pieceMap n - writeFileAtOffset handle offset piece - verifyPiece n = do - let offset = pieceNumToOffset pieceMap n - hash' = hash (pieceMap ! n) - len' = len (pieceMap ! n) - bs' <- readFileAtOffset handle offset len' - return $ verifyHash bs' hash' - updateStats (ReadPiece _ l _) = - modify (\st -> st {bytesRead = bytesRead st + l}) - updateStats (WritePiece (Piece _ bs)) = - modify (\st -> st {bytesWritten = bytesWritten st + fromIntegral (BS.length bs)}) - updateStats _ = modify id - -pieceMapFromFile :: FilePath -> Integer -> PieceMap -> IO PieceMap -pieceMapFromFile filePath fileLen pieceMap = do - dfe <- doesFileExist filePath - if dfe - then traverseWithKey f pieceMap - else createDummyFile filePath (fromIntegral fileLen) >> return pieceMap - where - f k v = do - let offset = pieceNumToOffset pieceMap k - isHashValid <- flip verifyHash (hash v) <$> withFile filePath ReadWriteMode (\handle -> readFileAtOffset handle offset (len v)) - if isHashValid - then return $ v { dlstate = Have } - else return v - -writePieceToDisk :: MsgChannel -> PieceNum -> BS.ByteString -> IO () -writePieceToDisk c pieceNum bs = - writeChan c $ WritePiece (Piece pieceNum bs) - -getStats :: MsgChannel -> IO (MVar Stats) -getStats c = do - v <- newEmptyMVar - writeChan c $ GetStats v - return v diff --git a/src/FuncTorrent/Logger.hs b/src/FuncTorrent/Logger.hs deleted file mode 100644 index 431a96c..0000000 --- a/src/FuncTorrent/Logger.hs +++ /dev/null @@ -1,72 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -module FuncTorrent.Logger ( - initLogger - , logMessage - , logStop - ) where - -import Control.Concurrent - --- The below logger implementation has been taken from --- Parallel and Concurrent Programming in Haskell, Chapter 7 --- The logger is implemented in a concurrent thread. - --- Here the (MVar LogCommand) is used for actual thread communication --- So if multiple threads try to log, then the logger will be thread-safe --- Also the 'loop' in logger will wait for the message to come. --- --- The MVar in stop is just to ensure the logger thread executes completely --- Before exiting the main application. -data Logger = Logger (MVar LogCommand) -data LogCommand = Message String | Stop (MVar ()) - -initLogger :: IO Logger -initLogger = do - m <- newEmptyMVar - let l = Logger m - _ <- forkIO (logger l) - return l - -logger :: Logger -> IO () -logger (Logger m) = loop - where - loop = do - cmd <- takeMVar m - case cmd of - Message msg -> do - -- We can alternatively put the message to a file - putStrLn msg - -- Recursive - loop - Stop s -> do - putStrLn "FuncTorrent: Exit succesfully" - putMVar s () - --- Send log message to logger -logMessage :: Logger -> String -> IO () -logMessage (Logger m) s = putMVar m (Message s) - -logStop :: Logger -> IO () -logStop (Logger m) = do - s <- newEmptyMVar - putMVar m (Stop s) - -- Wait for logger to complete the logging - takeMVar s diff --git a/src/FuncTorrent/Metainfo.hs b/src/FuncTorrent/Metainfo.hs deleted file mode 100644 index 898cc54..0000000 --- a/src/FuncTorrent/Metainfo.hs +++ /dev/null @@ -1,104 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -module FuncTorrent.Metainfo - (Info(..), - Metainfo(..), - torrentToMetainfo - ) where - -import Prelude hiding (lookup) -import Data.ByteString.Char8 (ByteString, unpack) -import Data.Map as M ((!), lookup) -import Crypto.Hash.SHA1 (hash) -import Data.Maybe (maybeToList) - -import FuncTorrent.Bencode (BVal(..), encode, decode, bstrToString, bValToInteger) - --- only single file mode supported for the time being. -data Info = Info { pieceLength :: !Integer - , pieces :: !ByteString - , private :: !(Maybe Integer) - , name :: !String - , lengthInBytes :: !Integer - , md5sum :: !(Maybe String) - } deriving (Eq, Show) - -data Metainfo = Metainfo { info :: !Info - , announceList :: ![String] - , creationDate :: !(Maybe Integer) - , comment :: !(Maybe String) - , createdBy :: !(Maybe String) - , encoding :: !(Maybe String) - , infoHash :: !ByteString - } deriving (Eq, Show) - -mkInfo :: BVal -> Maybe Info -mkInfo (Bdict m) = let (Bint pieceLength') = m ! "piece length" - (Bstr pieces') = m ! "pieces" - private' = Nothing - (Bstr name') = m ! "name" - (Bint length') = m ! "length" - md5sum' = Nothing - in Just Info { pieceLength = pieceLength' - , pieces = pieces' - , private = private' - , name = unpack name' - , lengthInBytes = length' - , md5sum = md5sum'} -mkInfo _ = Nothing - -mkMetaInfo :: BVal -> Either String Metainfo -mkMetaInfo (Bdict m) = - let (Just info') = mkInfo $ m ! "info" - announce' = lookup "announce" m - announceList' = lookup "announce-list" m - creationDate' = lookup "creation date" m - comment' = lookup "comment" m - createdBy' = lookup "created by" m - encoding' = lookup "encoding" m - in Right Metainfo { - info = info' - , announceList = maybeToList (announce' >>= bstrToString) - ++ getAnnounceList announceList' - , creationDate = bValToInteger =<< creationDate' - , comment = bstrToString =<< comment' - , createdBy = bstrToString =<< createdBy' - , encoding = bstrToString =<< encoding' - , infoHash = hash . encode $ (m ! "info") - } -mkMetaInfo _ = Left "mkMetaInfo: expect an input dict" - -getAnnounceList :: Maybe BVal -> [String] -getAnnounceList Nothing = [] -getAnnounceList (Just (Bint _)) = [] -getAnnounceList (Just (Bstr _)) = [] -getAnnounceList (Just (Blist l)) = map (\s -> case s of - (Bstr s') -> unpack s' - (Blist s') -> case s' of - [Bstr s''] -> unpack s'' - _ -> "" - _ -> "") l -getAnnounceList (Just (Bdict _)) = [] - -torrentToMetainfo :: ByteString -> Either String Metainfo -torrentToMetainfo s = - case decode s of - Right d -> mkMetaInfo d - Left e -> Left $ show e diff --git a/src/FuncTorrent/Network.hs b/src/FuncTorrent/Network.hs deleted file mode 100644 index 99243f6..0000000 --- a/src/FuncTorrent/Network.hs +++ /dev/null @@ -1,45 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} - -module FuncTorrent.Network - (sendGetRequest - , mkParams - ) where - -import Prelude hiding (concat) - -import Data.ByteString (ByteString) -import Data.ByteString.Char8 as BC (pack, unpack, concat, intercalate) -import Network.HTTP (simpleHTTP, defaultGETRequest_, getResponseBody) -import Network.URI (parseURI) - --- | Make a query string from a alist of k, v --- TODO: Url encode each argument -mkParams :: [(String, ByteString)] -> ByteString -mkParams params = BC.intercalate "&" [concat [pack f, "=", s] | (f,s) <- params] - -sendGetRequest :: String -> [(String, ByteString)] -> IO ByteString -sendGetRequest url args = simpleHTTP (defaultGETRequest_ url') >>= getResponseBody - where url' = case parseURI url'' of - Just x -> x - _ -> error $ "Bad tracker URL: " ++ show url'' - qstr = mkParams args - url'' = unpack $ concat [pack url, "?", qstr] diff --git a/src/FuncTorrent/Peer.hs b/src/FuncTorrent/Peer.hs deleted file mode 100644 index bf1153b..0000000 --- a/src/FuncTorrent/Peer.hs +++ /dev/null @@ -1,201 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} - -module FuncTorrent.Peer - (handlePeerMsgs - ) where - -import Prelude hiding (lookup, concat, replicate, splitAt, take, drop) - -import Control.Monad.State -import Data.ByteString (ByteString, unpack, concat, hGet, hPut, take, drop, empty) -import Data.Bits -import Data.Word (Word8) -import Data.Map ((!), adjust) -import Network (connectTo, PortID(..)) -import System.IO (Handle, BufferMode(..), hSetBuffering, hClose) - -import FuncTorrent.Metainfo (Metainfo(..)) -import FuncTorrent.PeerMsgs (Peer(..), PeerMsg(..), sendMsg, getMsg, genHandshakeMsg) -import FuncTorrent.Utils (splitNum, verifyHash) -import FuncTorrent.PieceManager (PieceDlState(..), PieceData(..), PieceMap, pickPiece, updatePieceAvailability) -import qualified FuncTorrent.FileSystem as FS (MsgChannel, writePieceToDisk) - -data PState = PState { handle :: Handle - , peer :: Peer - , meChoking :: Bool - , meInterested :: Bool - , heChoking :: Bool - , heInterested :: Bool} - -havePiece :: PieceMap -> Integer -> Bool -havePiece pm index = - dlstate (pm ! index) == Have - -connectToPeer :: Peer -> IO Handle -connectToPeer (Peer ip port) = do - h <- connectTo ip (PortNumber (fromIntegral port)) - hSetBuffering h LineBuffering - return h - -doHandshake :: Bool -> Handle -> Peer -> ByteString -> String -> IO () -doHandshake True h p infohash peerid = do - let hs = genHandshakeMsg infohash peerid - hPut h hs - putStrLn $ "--> handhake to peer: " ++ show p - _ <- hGet h (length (unpack hs)) - putStrLn $ "<-- handshake from peer: " ++ show p - return () -doHandshake False h p infohash peerid = do - let hs = genHandshakeMsg infohash peerid - putStrLn "waiting for a handshake" - hsMsg <- hGet h (length (unpack hs)) - putStrLn $ "<-- handshake from peer: " ++ show p - let rxInfoHash = take 20 $ drop 28 hsMsg - if rxInfoHash /= infohash - then do - putStrLn "infoHashes does not match" - hClose h - return () - else do - _ <- hPut h hs - putStrLn $ "--> handhake to peer: " ++ show p - return () - -bitfieldToList :: [Word8] -> [Integer] -bitfieldToList bs = go bs 0 - where go [] _ = [] - go (b:bs') pos = - let setBits = [pos*8 + toInteger i | i <- [0..8], testBit b i] - in - setBits ++ go bs' (pos + 1) - --- helper functions to manipulate PeerState -toPeerState :: Handle - -> Peer - -> Bool -- ^ meChoking - -> Bool -- ^ meInterested - -> Bool -- ^ heChoking - -> Bool -- ^ heInterested - -> PState -toPeerState h p meCh meIn heCh heIn = - PState { handle = h - , peer = p - , heChoking = heCh - , heInterested = heIn - , meChoking = meCh - , meInterested = meIn } - -handlePeerMsgs :: Peer -> String -> Metainfo -> PieceMap -> Bool -> FS.MsgChannel -> IO () -handlePeerMsgs p peerId m pieceMap isClient c = do - h <- connectToPeer p - doHandshake isClient h p (infoHash m) peerId - let pstate = toPeerState h p False False True True - _ <- runStateT (msgLoop pieceMap c) pstate - return () - -msgLoop :: PieceMap -> FS.MsgChannel -> StateT PState IO () -msgLoop pieceStatus msgchannel = do - h <- gets handle - st <- get - case st of - PState { meInterested = False, heChoking = True } -> do - liftIO $ sendMsg h InterestedMsg - gets peer >>= (\p -> liftIO $ putStrLn $ "--> InterestedMsg to peer: " ++ show p) - modify (\st' -> st' { meInterested = True }) - msgLoop pieceStatus msgchannel - PState { meInterested = True, heChoking = False } -> - case pickPiece pieceStatus of - Nothing -> liftIO $ putStrLn "Nothing to download" - Just workPiece -> do - let pLen = len (pieceStatus ! workPiece) - liftIO $ putStrLn $ "piece length = " ++ show pLen - pBS <- liftIO $ downloadPiece h workPiece pLen - if not $ verifyHash pBS (hash (pieceStatus ! workPiece)) - then - liftIO $ putStrLn "Hash mismatch" - else do - liftIO $ putStrLn $ "Write piece: " ++ show workPiece - liftIO $ FS.writePieceToDisk msgchannel workPiece pBS - msgLoop (adjust (\pieceData -> pieceData { dlstate = Have }) workPiece pieceStatus) msgchannel - _ -> do - msg <- liftIO $ getMsg h - gets peer >>= (\p -> liftIO $ putStrLn $ "<-- " ++ show msg ++ " from peer: " ++ show p) - case msg of - KeepAliveMsg -> do - liftIO $ sendMsg h KeepAliveMsg - gets peer >>= (\p -> liftIO $ putStrLn $ "--> " ++ "KeepAliveMsg to peer: " ++ show p) - msgLoop pieceStatus msgchannel - BitFieldMsg bss -> do - p <- gets peer - let pieceList = bitfieldToList (unpack bss) - pieceStatus' = updatePieceAvailability pieceStatus p pieceList - liftIO $ putStrLn $ show (length pieceList) ++ " Pieces" - -- for each pieceIndex in pieceList, make an entry in the pieceStatus - -- map with pieceIndex as the key and modify the value to add the peer. - -- download each of the piece in order - msgLoop pieceStatus' msgchannel - UnChokeMsg -> do - modify (\st' -> st' {heChoking = False }) - msgLoop pieceStatus msgchannel - ChokeMsg -> do - modify (\st' -> st' {heChoking = True }) - msgLoop pieceStatus msgchannel - InterestedMsg -> do - modify (\st' -> st' {heInterested = True}) - msgLoop pieceStatus msgchannel - NotInterestedMsg -> do - modify (\st' -> st' {heInterested = False}) - msgLoop pieceStatus msgchannel - CancelMsg {} -> -- check if valid index, begin, length - msgLoop pieceStatus msgchannel - PortMsg _ -> - msgLoop pieceStatus msgchannel - HaveMsg idx -> do - p <- gets peer - let pieceStatus' = updatePieceAvailability pieceStatus p [idx] - msgLoop pieceStatus' msgchannel - _ -> do - liftIO $ putStrLn ".. not doing anything with the msg" - msgLoop pieceStatus msgchannel - -- No need to handle PieceMsg and RequestMsg here. - - -downloadPiece :: Handle -> Integer -> Integer -> IO ByteString -downloadPiece h index pieceLength = do - let chunks = splitNum pieceLength 16384 - concat `liftM` forM (zip [0..] chunks) (\(i, pLen) -> do - sendMsg h (RequestMsg index (i*pLen) pLen) - putStrLn $ "--> " ++ "RequestMsg for Piece " - ++ show index ++ ", part: " ++ show i ++ " of length: " - ++ show pLen - msg <- getMsg h - case msg of - PieceMsg index begin block -> do - putStrLn $ " <-- PieceMsg for Piece: " - ++ show index - ++ ", offset: " - ++ show begin - return block - _ -> do - putStrLn $ "ignoring irrelevant msg: " ++ show msg - return empty) - diff --git a/src/FuncTorrent/PeerMsgs.hs b/src/FuncTorrent/PeerMsgs.hs deleted file mode 100644 index f597ed8..0000000 --- a/src/FuncTorrent/PeerMsgs.hs +++ /dev/null @@ -1,153 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} - -module FuncTorrent.PeerMsgs - (genHandshakeMsg, - sendMsg, - getMsg, - Peer(..), - makePeer, - PeerMsg(..) - ) where - -import Prelude hiding (lookup, concat, replicate, splitAt, take) - -import System.IO (Handle) -import Data.ByteString (ByteString, pack, unpack, concat, hGet, hPut, singleton) -import Data.ByteString.Lazy (fromStrict, fromChunks, toStrict) -import Data.ByteString.Char8 as BC (splitAt) -import qualified Data.ByteString.Char8 as BC (replicate, pack) -import Control.Monad (replicateM, liftM) -import Control.Applicative (liftA3) - -import Data.Binary (Binary(..), decode, encode) -import Data.Binary.Put (putWord32be, putWord16be, putWord8) -import Data.Binary.Get (getWord32be, getWord16be, getWord8, runGet) - -import FuncTorrent.Utils (toIP, toPort) - --- | Peer is a IP address, port tuple -data Peer = Peer IP Port - deriving (Show, Eq) - -type ID = String -type IP = String -type Port = Integer - -data PeerMsg = KeepAliveMsg - | ChokeMsg - | UnChokeMsg - | InterestedMsg - | NotInterestedMsg - | HaveMsg Integer - | BitFieldMsg ByteString - | RequestMsg Integer Integer Integer - | PieceMsg Integer Integer ByteString - | CancelMsg Integer Integer Integer - | PortMsg Port - deriving (Show) - -instance Binary PeerMsg where - put msg = case msg of - KeepAliveMsg -> putWord32be 0 - ChokeMsg -> do putWord32be 1 - putWord8 0 - UnChokeMsg -> do putWord32be 1 - putWord8 1 - InterestedMsg -> do putWord32be 1 - putWord8 2 - NotInterestedMsg -> do putWord32be 1 - putWord8 3 - HaveMsg i -> do putWord32be 5 - putWord8 4 - putWord32be (fromIntegral i) - BitFieldMsg bf -> do putWord32be $ fromIntegral (1 + bfListLen) - putWord8 5 - mapM_ putWord8 bfList - where bfList = unpack bf - bfListLen = length bfList - RequestMsg i o l -> do putWord32be 13 - putWord8 6 - putIndexOffsetLength i o l - PieceMsg i o b -> do putWord32be $ fromIntegral (9 + blocklen) - putWord8 7 - putWord32be (fromIntegral i) - putWord32be (fromIntegral o) - mapM_ putWord8 blockList - where blockList = unpack b - blocklen = length blockList - CancelMsg i o l -> do putWord32be 13 - putWord8 8 - putIndexOffsetLength i o l - PortMsg p -> do putWord32be 3 - putWord8 9 - putWord16be (fromIntegral p) - where putIndexOffsetLength i o l = do - putWord32be (fromIntegral i) - putWord32be (fromIntegral o) - putWord32be (fromIntegral l) - - get = do - l <- getWord32be - msgid <- getWord8 - case msgid of - 0 -> return ChokeMsg - 1 -> return UnChokeMsg - 2 -> return InterestedMsg - 3 -> return NotInterestedMsg - 4 -> fmap (HaveMsg . fromIntegral) getWord32be - 5 -> fmap (BitFieldMsg . pack) (replicateM (fromIntegral l - 1) getWord8) - 6 -> liftA3 RequestMsg getInteger getInteger getInteger - where getInteger = fromIntegral <$> getWord32be - 7 -> liftA3 PieceMsg getInteger getInteger (pack <$> replicateM (fromIntegral l - 9) getWord8) - where getInteger = fromIntegral <$> getWord32be - 8 -> liftA3 CancelMsg getInteger getInteger getInteger - where getInteger = fromIntegral <$> getWord32be - 9 -> fmap (PortMsg . fromIntegral) getWord16be - _ -> error ("unknown message ID: " ++ show msgid) - -getMsg :: Handle -> IO PeerMsg -getMsg h = do - lBS <- hGet h 4 - let l = bsToInt lBS - if l == 0 - then return KeepAliveMsg - else do - msg <- hGet h l - return $ decode $ fromStrict $ concat [lBS, msg] - -sendMsg :: Handle -> PeerMsg -> IO () -sendMsg h msg = hPut h bsMsg - where bsMsg = toStrict $ encode msg - -genHandshakeMsg :: ByteString -> String -> ByteString -genHandshakeMsg infoHash peer_id = concat [pstrlen, pstr, reserved, infoHash, peerID] - where pstrlen = singleton 19 - pstr = BC.pack "BitTorrent protocol" - reserved = BC.replicate 8 '\0' - peerID = BC.pack peer_id - -bsToInt :: ByteString -> Int -bsToInt x = fromIntegral (runGet getWord32be (fromChunks (return x))) - -makePeer :: ByteString -> Peer -makePeer peer = Peer (toIP ip') (toPort port') - where (ip', port') = splitAt 4 peer diff --git a/src/FuncTorrent/PieceManager.hs b/src/FuncTorrent/PieceManager.hs deleted file mode 100644 index c4617ca..0000000 --- a/src/FuncTorrent/PieceManager.hs +++ /dev/null @@ -1,88 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -module FuncTorrent.PieceManager - (PieceDlState(..), - PieceData(..), - PieceMap, - pieceNumToOffset, - updatePieceAvailability, - pickPiece, - bytesDownloaded, - initPieceMap, - ) where - -import Prelude hiding (filter) - -import qualified Data.ByteString.Char8 as BC (length) -import Control.Monad (liftM) -import Data.ByteString (ByteString) -import Data.Map (Map, (!), fromList, toList, mapWithKey, filter) -import Safe (headMay) - -import FuncTorrent.PeerMsgs (Peer) -import FuncTorrent.Utils (splitN, splitNum) - -data PieceDlState = Pending - | Downloading - | Have - deriving (Show, Eq) - --- todo - map with index to a new data structure (peers who have that piece and state) -data PieceData = PieceData { peers :: [Peer] -- ^ list of peers who have this piece - , dlstate :: PieceDlState -- ^ state of the piece from download perspective. - , hash :: ByteString -- ^ piece hash - , len :: Integer } -- ^ piece length - --- which piece is with which peers -type PieceMap = Map Integer PieceData - -pieceNumToOffset :: PieceMap -> Integer -> Integer -pieceNumToOffset _ 0 = 0 -pieceNumToOffset pieceMap k = k * len (pieceMap ! (k - 1)) - --- simple algorithm to pick piece. --- pick the first piece from 0 that is not downloaded yet. -pickPiece :: PieceMap -> Maybe Integer -pickPiece = - (fst `liftM`) . headMay . toList . filter (\v -> dlstate v == Pending) - -bytesDownloaded :: PieceMap -> Integer -bytesDownloaded = - sum . map (len . snd) . toList . filter (\v -> dlstate v == Have) - -updatePieceAvailability :: PieceMap -> Peer -> [Integer] -> PieceMap -updatePieceAvailability pieceStatus p pieceList = - mapWithKey (\k pd -> if k `elem` pieceList - then (pd { peers = p : peers pd }) - else pd) pieceStatus - --- Make the initial Piece map, with the assumption that no peer has the --- piece and that every piece is pending download. -initPieceMap :: ByteString -> Integer -> Integer -> PieceMap -initPieceMap pieceHash fileLen pieceLen = fromList kvs - where - numPieces = (toInteger . (`quot` 20) . BC.length) pieceHash - kvs = [(i, PieceData { peers = [] - , dlstate = Pending - , hash = h - , len = pLen }) - | (i, h, pLen) <- zip3 [0..numPieces] hashes pLengths] - hashes = splitN 20 pieceHash - pLengths = splitNum fileLen pieceLen diff --git a/src/FuncTorrent/Server.hs b/src/FuncTorrent/Server.hs deleted file mode 100644 index d8a18ff..0000000 --- a/src/FuncTorrent/Server.hs +++ /dev/null @@ -1,48 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} - -module FuncTorrent.Server where - -import Control.Concurrent (forkIO) -import Control.Monad (forever) -import Network (withSocketsDo, listenOn, accept, Socket, PortID ( PortNumber )) -import System.IO (hSetBuffering, BufferMode ( NoBuffering )) - -import FuncTorrent.Metainfo (Metainfo) -import FuncTorrent.Peer (handlePeerMsgs) -import FuncTorrent.PeerMsgs (Peer(..)) -import FuncTorrent.PieceManager (PieceMap) -import qualified FuncTorrent.FileSystem as FS (MsgChannel) - --- server is listening on any port from 6881 - 6889 --- return the port number used -start :: IO (Socket, PortID) -start = withSocketsDo $ do - let portnums = [6881 .. 6889] - sock <- listenOn $ PortNumber $ fromIntegral (head portnums) - return (sock, PortNumber $ head portnums) - -run :: Socket -> String -> Metainfo -> PieceMap -> FS.MsgChannel -> IO () -run listenSock peerid m pieceMap c = forever $ do - (handle, ip, port) <- accept listenSock - let peer = Peer ip (fromIntegral port) - hSetBuffering handle NoBuffering - forkIO $ handlePeerMsgs peer peerid m pieceMap False c diff --git a/src/FuncTorrent/Tracker.hs b/src/FuncTorrent/Tracker.hs deleted file mode 100644 index b9e977a..0000000 --- a/src/FuncTorrent/Tracker.hs +++ /dev/null @@ -1,90 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} -module FuncTorrent.Tracker - (runTracker - , getConnectedPeers - , newTracker - ) where - -import Control.Concurrent(forkIO) -import Control.Concurrent.Chan (Chan, newChan, readChan, writeChan) -import Control.Concurrent.MVar (newEmptyMVar, putMVar, readMVar) -import Control.Monad.State (StateT, liftIO, get, runStateT) -import Control.Monad (forever) -import Data.ByteString.Char8 (ByteString) -import Data.List (isPrefixOf) -import Network (PortNumber) - -import qualified FuncTorrent.Tracker.Http as HT (trackerLoop) -import qualified FuncTorrent.Tracker.Udp as UT (trackerLoop) -import FuncTorrent.Tracker.Types (TState(..), TrackerEventState(..), TrackerProtocol(..), TrackerMsg(..)) -import qualified FuncTorrent.FileSystem as FS (MsgChannel) -import FuncTorrent.PeerMsgs (Peer) - -type MsgChannel = Chan TrackerMsg - -newTracker :: IO MsgChannel -newTracker = newChan - -runTracker :: MsgChannel -> FS.MsgChannel -> ByteString -> PortNumber - -> String -> [String] -> Integer -> IO () -runTracker msgChannel fsChan infohash port peerId announceList sz = do - let fn = getTrackerLoopFn turl - ps <- newEmptyMVar - _ <- forkIO $ fn turl port peerId infohash fsChan (initialTState ps) - _ <- runStateT (msgHandler msgChannel) (initialTState ps) - return () - where getTrackerLoopFn turl' = - case getTrackerType turl' of - Http -> HT.trackerLoop - Udp -> UT.trackerLoop - _ -> error "Tracker Protocol unimplemented" - initialTState ps' = TState { currentState = None - , connectedPeers = ps' - , left = sz } - turl = head announceList - -getTrackerType :: String -> TrackerProtocol -getTrackerType url | "http://" `isPrefixOf` url = Http - | "udp://" `isPrefixOf` url = Udp - | otherwise = UnknownProtocol - - -msgHandler :: MsgChannel -> StateT TState IO () -msgHandler c = forever $ do - st <- get - peers <- liftIO $ readMVar (connectedPeers st) - msg <- liftIO recvMsg - liftIO $ sendResponse msg peers - where - recvMsg = readChan c - sendResponse msg peers = - case msg of - GetConnectedPeersMsg var -> - putMVar var peers - _ -> - putStrLn "Unhandled Tracker Msg" - -getConnectedPeers :: MsgChannel -> IO [Peer] -getConnectedPeers c = do - v <- newEmptyMVar - writeChan c (GetConnectedPeersMsg v) - readMVar v diff --git a/src/FuncTorrent/Tracker/Http.hs b/src/FuncTorrent/Tracker/Http.hs deleted file mode 100644 index 13395cc..0000000 --- a/src/FuncTorrent/Tracker/Http.hs +++ /dev/null @@ -1,113 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} - -module FuncTorrent.Tracker.Http - (trackerLoop - ) where - -import Prelude hiding (lookup) - -import Control.Concurrent (threadDelay) -import Control.Concurrent.MVar (readMVar, putMVar, isEmptyMVar, swapMVar) -import Control.Monad (forever, void) -import qualified Data.ByteString.Base16 as B16 (encode) -import Data.ByteString (ByteString) -import Data.ByteString.Char8 as BC (pack, unpack) -import Data.Char (chr) -import Data.Map as M (lookup) -import Network (PortNumber) -import Network.HTTP.Base (urlEncode) - -import qualified FuncTorrent.Bencode as Benc -import FuncTorrent.Bencode (BVal(..)) -import qualified FuncTorrent.FileSystem as FS (MsgChannel, Stats(..), getStats) -import FuncTorrent.Network (sendGetRequest) -import FuncTorrent.PeerMsgs (makePeer) -import FuncTorrent.Utils (splitN, IP, Port) -import FuncTorrent.Tracker.Types(TState(..), HttpTrackerResponse(..)) - - ---- | URL encode hash as per RFC1738 ---- TODO: Add tests ---- REVIEW: Why is this not written in terms of `Network.HTTP.Base.urlEncode` or ---- equivalent library function? -urlEncodeHash :: ByteString -> String -urlEncodeHash bs = concatMap (encode' . unpack) (splitN 2 bs) - where encode' b@[c1, c2] = let c = chr (read ("0x" ++ b)) - in escape c c1 c2 - encode' _ = "" - escape i c1 c2 | i `elem` nonSpecialChars = [i] - | otherwise = "%" ++ [c1] ++ [c2] - - nonSpecialChars = ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ "-_.~" - --- | Make arguments that should be posted to tracker. --- This is a separate pure function for testability. -mkArgs :: PortNumber -> String -> Integer -> Integer -> Integer -> ByteString -> [(String, ByteString)] -mkArgs port peer_id up down left' infoHash = - [("info_hash", pack . urlEncodeHash . B16.encode $ infoHash), - ("peer_id", pack . urlEncode $ peer_id), - ("port", pack $ show port), - ("uploaded", pack $ show up), - ("downloaded", pack $ show down), - ("left", pack $ show left'), - ("compact", "1"), - ("event", "started")] - -trackerLoop :: String -> PortNumber -> String -> ByteString -> FS.MsgChannel -> TState -> IO () -trackerLoop url sport peerId infohash fschan tstate = forever $ do - st <- readMVar <$> FS.getStats fschan - up <- fmap FS.bytesRead st - down <- fmap FS.bytesWritten st - resp <- sendGetRequest url $ mkArgs sport peerId up down (left tstate) infohash - case Benc.decode resp of - Left e -> - return () -- $ pack (show e) - Right trackerInfo -> - case parseTrackerResponse trackerInfo of - Left e -> return () - Right tresp -> do - ps <- isEmptyMVar $ connectedPeers tstate - if ps - then - putMVar (connectedPeers tstate) (peers tresp) - else - void $ swapMVar (connectedPeers tstate) (peers tresp) - threadDelay $ fromIntegral (interval tresp) - -parseTrackerResponse :: BVal -> Either ByteString HttpTrackerResponse -parseTrackerResponse resp = - case lookup "failure reason" body of - Just (Bstr err) -> Left err - Just _ -> Left "Unknown failure" - Nothing -> - let (Just (Bint i)) = lookup "interval" body - (Just (Bstr peersBS)) = lookup "peers" body - pl = map makePeer (splitN 6 peersBS) - in Right HttpTrackerResponse { - interval = i - , peers = pl - , complete = Nothing - , incomplete = Nothing - } - where - (Bdict body) = resp - diff --git a/src/FuncTorrent/Tracker/Types.hs b/src/FuncTorrent/Tracker/Types.hs deleted file mode 100644 index 1c47d31..0000000 --- a/src/FuncTorrent/Tracker/Types.hs +++ /dev/null @@ -1,69 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} -{-# LANGUAGE DuplicateRecordFields #-} -module FuncTorrent.Tracker.Types - ( TrackerProtocol(..) - , HttpTrackerResponse(..) - , UdpTrackerResponse(..) - , TrackerEventState(..) - , TState(..) - , TrackerMsg(..) - ) where - -import Data.ByteString (ByteString) -import Data.Word (Word32) -import Control.Concurrent.MVar (MVar) - -import FuncTorrent.PeerMsgs (Peer) - -data TrackerProtocol = Http - | Udp - | UnknownProtocol - deriving (Show) - -data TrackerEventState = None - | Started - | Completed - | Stopped - deriving (Show, Eq) - -data TrackerMsg = GetStatusMsg TrackerEventState - | GetConnectedPeersMsg (MVar [Peer]) - -data TState = TState { left :: Integer - , currentState :: TrackerEventState - , connectedPeers :: MVar [Peer] - } - --- | Tracker response -data HttpTrackerResponse = HttpTrackerResponse { - interval :: Integer - , peers :: [Peer] - , complete :: Maybe Integer - , incomplete :: Maybe Integer - } deriving (Show, Eq) - -data UdpTrackerResponse = UdpTrackerResponse { - leechers :: Word32 - , seeders :: Word32 - , interval :: Word32 - , peers :: [Peer] - } deriving (Show) diff --git a/src/FuncTorrent/Tracker/Udp.hs b/src/FuncTorrent/Tracker/Udp.hs deleted file mode 100644 index de99ce2..0000000 --- a/src/FuncTorrent/Tracker/Udp.hs +++ /dev/null @@ -1,232 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -{-# LANGUAGE OverloadedStrings #-} -module FuncTorrent.Tracker.Udp - (trackerLoop - ) where - -import Control.Applicative (liftA2) -import Control.Monad (forever, void) -import Control.Concurrent (threadDelay) -import Control.Concurrent.MVar (readMVar, putMVar, isEmptyMVar, swapMVar) -import Control.Monad.Reader (ReaderT, runReaderT, ask, liftIO) -import Data.Binary (Binary(..), encode, decode) -import Data.Binary.Get (Get, isEmpty, getWord32be, getWord64be, getByteString) -import Data.Binary.Put (putWord16be, putWord64be, putWord32be, putByteString) -import Data.ByteString (ByteString) -import qualified Data.ByteString.Char8 as BC -import Data.ByteString.Lazy (fromStrict, toStrict) -import Data.Word (Word16, Word32, Word64) -import Network (PortNumber) -import Network.Socket (Socket, Family( AF_INET ), SocketType( Datagram ), defaultProtocol, SockAddr(..), socket, close, getAddrInfo, addrAddress, SockAddr(..)) -import Network.Socket.ByteString (sendTo, recvFrom) -import System.Random (randomIO) -import System.Timeout (timeout) - -import FuncTorrent.PeerMsgs (Peer(..)) -import FuncTorrent.Tracker.Types (TrackerEventState(..), TState(..), UdpTrackerResponse(..)) -import FuncTorrent.Utils (Port, toIP, toPort, getHostname, getPort) -import qualified FuncTorrent.FileSystem as FS (MsgChannel, Stats(..), getStats) - --- UDP tracker: http://bittorrent.org/beps/bep_0015.html -data Action = Connect - | Announce - | Scrape - deriving (Show, Eq) - -data UDPRequest = ConnectReq Word32 - | AnnounceReq Word64 Word32 ByteString String Word64 Word64 Word64 TrackerEventState Word16 - | ScrapeReq Integer Integer ByteString - deriving (Show, Eq) - -data UDPResponse = ConnectResp Word32 Word64 -- transaction_id connection_id - | AnnounceResp Word32 Word32 Word32 Word32 [Peer] -- transaction_id interval leechers seeders [(ip, port)] - | ScrapeResp Integer Integer Integer Integer - | ErrorResp Integer String - deriving (Show, Eq) - -data UDPTrackerHandle = UDPTrackerHandle { sock :: Socket - , addr :: SockAddr - } - -actionToInteger :: Action -> Integer -actionToInteger Connect = 0 -actionToInteger Announce = 1 -actionToInteger Scrape = 2 - -eventToInteger :: TrackerEventState -> Integer -eventToInteger None = 0 -eventToInteger Completed = 1 -eventToInteger Started = 2 -eventToInteger Stopped = 3 - -instance Binary UDPRequest where - put (ConnectReq transId) = do - putWord64be 0x41727101980 - putWord32be $ fromIntegral (actionToInteger Connect) - putWord32be (fromIntegral transId) - put (AnnounceReq connId transId infohash peerId down left' up event port) = do - putWord64be $ fromIntegral connId - putWord32be $ fromIntegral (actionToInteger Announce) - putWord32be $ fromIntegral transId - putByteString infohash - putByteString (BC.pack peerId) - putWord64be (fromIntegral down) - putWord64be (fromIntegral left') - putWord64be (fromIntegral up) - putWord32be $ fromIntegral (eventToInteger event) - putWord32be 0 - putWord32be 0 - putWord32be 10 - putWord16be $ fromIntegral port - put ScrapeReq {} = undefined - get = undefined - -instance Binary UDPResponse where - put = undefined - get = do - a <- getWord32be -- action - case a of - 0 -> liftA2 ConnectResp (fromIntegral <$> getWord32be) (fromIntegral <$> getWord64be) - 1 -> do - tid' <- fromIntegral <$> getWord32be - interval' <- fromIntegral <$> getWord32be - l <- getWord32be -- leechers - s <- getWord32be -- seeders - ipportpairs <- getIPPortPairs -- [(ip, port)] - return $ AnnounceResp tid' interval' l s ipportpairs - 2 -> do - tid' <- fromIntegral <$> getWord32be - _ <- getWord32be - _ <- getWord32be - _ <- getWord32be - return $ ScrapeResp tid' 0 0 0 - 3 -> do -- error response - tid' <- fromIntegral <$> getWord32be - bs <- getByteString 4 - return $ ErrorResp tid' $ BC.unpack bs - _ -> error ("unknown response action type: " ++ show a) - -sendRequest :: UDPTrackerHandle -> ByteString -> IO () -sendRequest h req = do - n <- sendTo (sock h) req (addr h) - -- sanity check with n? - return () - -recvResponse :: UDPTrackerHandle -> IO UDPResponse -recvResponse h = do - (bs, saddr) <- recvFrom (sock h) (16*1024) - return $ decode $ fromStrict bs - -connectRequest :: ReaderT UDPTrackerHandle IO Word32 -connectRequest = do - h <- ask - tidi <- liftIO randomIO - let pkt = encode $ ConnectReq tidi - liftIO $ sendRequest h (toStrict pkt) - return tidi - -connectResponse :: Word32 -> ReaderT UDPTrackerHandle IO Word64 -connectResponse tid = do - h <- ask - resp <- liftIO $ recvResponse h - -- check if nbytes is at least 16 bytes long - case resp of - (ConnectResp tidr cid) -> - if tidr == tid - then do - liftIO $ putStrLn "connect succeeded" - return cid - else - return 0 - _ -> return 0 - -announceRequest :: Word64 -> ByteString -> String -> Word64 -> Word64 -> Word64 -> Word16 -> ReaderT UDPTrackerHandle IO Word32 -announceRequest cid infohash peerId up down left' port = do - h <- ask - tidi <- liftIO randomIO - let pkt = encode $ AnnounceReq cid tidi infohash peerId down left' up None port - liftIO $ sendRequest h (toStrict pkt) - return tidi - -announceResponse :: Word32 -> ReaderT UDPTrackerHandle IO UdpTrackerResponse -announceResponse tid = do - h <- ask - resp <- liftIO $ recvResponse h - case resp of - (AnnounceResp tidr interval' ss ls xs) -> - if tidr == tid - then do - liftIO $ putStrLn "announce succeeded" - return $ UdpTrackerResponse ls ss interval' xs - else - return $ UdpTrackerResponse 0 0 0 [] - _ -> return $ UdpTrackerResponse 0 0 0 [] - -getIPPortPairs :: Get [Peer] -getIPPortPairs = do - empty <- isEmpty - if empty - then return [] - else do - ip <- toIP <$> getByteString 4 - port <- toPort <$> getByteString 2 - ipportpairs <- getIPPortPairs - return $ Peer ip port : ipportpairs - -startSession :: String -> Port -> IO UDPTrackerHandle -startSession host port = do - s <- socket AF_INET Datagram defaultProtocol - addrinfos <- getAddrInfo Nothing (Just host) (Just (show port)) - let (SockAddrInet p ip) = addrAddress $ head addrinfos - putStrLn "connected to tracker" - return UDPTrackerHandle { sock = s - , addr = SockAddrInet (fromIntegral port) ip } - -closeSession :: UDPTrackerHandle -> IO () -closeSession (UDPTrackerHandle s _) = close s - -trackerLoop :: String -> PortNumber -> String -> ByteString -> FS.MsgChannel -> TState -> IO () -trackerLoop url sport peerId infohash fschan tstate = forever $ do - st <- readMVar <$> FS.getStats fschan - up <- fmap FS.bytesRead st - down <- fmap FS.bytesWritten st - handle <- startSession host port - stats <- timeout (15*oneSec) $ worker handle up down - case stats of - Nothing -> closeSession handle - Just stats' -> do - ps <- isEmptyMVar $ connectedPeers tstate - if ps - then - putMVar (connectedPeers tstate) (peers stats') - else - void $ swapMVar (connectedPeers tstate) (peers stats') - threadDelay $ fromIntegral (interval stats') * oneSec - return () - where - oneSec = 1000000 - port = getPort url - host = getHostname url - worker handle up down = flip runReaderT handle $ do - t1 <- connectRequest - cid <- connectResponse t1 - t2 <- announceRequest cid infohash peerId (fromIntegral up) (fromIntegral down) (fromIntegral (left tstate)) (fromIntegral sport) - announceResponse t2 diff --git a/src/FuncTorrent/Utils.hs b/src/FuncTorrent/Utils.hs deleted file mode 100644 index 30fd160..0000000 --- a/src/FuncTorrent/Utils.hs +++ /dev/null @@ -1,98 +0,0 @@ -{- - - Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - - - - 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 - -} - -module FuncTorrent.Utils - ( createDummyFile - , writeFileAtOffset - , readFileAtOffset - , splitNum - , splitN - , verifyHash - , IP - , Port - , toIP - , toPort - , getHostname - , getPort - ) - where - -import Prelude hiding (writeFile, take) - -import qualified Crypto.Hash.SHA1 as SHA1 (hash) -import Control.Exception.Base (IOException, try) -import Data.ByteString (ByteString, writeFile, hPut, hGet, take) -import qualified Data.ByteString.Base16 as B16 (encode) -import qualified Data.ByteString.Char8 as BC -import Data.List (intercalate) -import System.IO (Handle, hSeek, SeekMode(..)) -import System.Directory (doesFileExist) - -type IP = String -type Port = Integer - -splitN :: Int -> BC.ByteString -> [BC.ByteString] -splitN n bs | BC.null bs = [] - | otherwise = BC.take n bs : splitN n (BC.drop n bs) - -splitNum :: Integer -> Integer -> [Integer] -splitNum n d | n == 0 = [] - | n < d = [n] - | otherwise = d : splitNum (n - d) d - -createDummyFile :: FilePath -> Int -> IO (Either IOException ()) -createDummyFile path size = do - dfe <- doesFileExist path - if not dfe - then - try $ writeFile path (BC.replicate size '\0') - else - return $ Right () - --- write into a file at a specific offet -writeFileAtOffset :: Handle -> Integer -> ByteString -> IO () -writeFileAtOffset h offset block = do - hSeek h AbsoluteSeek offset - hPut h block - -readFileAtOffset :: Handle -> Integer -> Integer -> IO ByteString -readFileAtOffset h offset len = do - hSeek h AbsoluteSeek offset - hGet h (fromInteger len) - -verifyHash :: ByteString -> ByteString -> Bool -verifyHash bs pieceHash = - take 20 (SHA1.hash bs) == pieceHash - -toPort :: ByteString -> Port -toPort = read . ("0x" ++) . BC.unpack . B16.encode - -toIP :: ByteString -> IP -toIP = Data.List.intercalate "." . - map (show . toInt . ("0x" ++) . BC.unpack) . - splitN 2 . B16.encode - -toInt :: String -> Integer -toInt = read - -getHostname :: String -> String -getHostname url = takeWhile (/= ':') $ drop 2 $ dropWhile (/= '/') url - -getPort :: String -> Port -getPort url = read $ takeWhile (/= '/') $ drop 1 $ dropWhile (/= ':') $ drop 2 $ dropWhile (/= '/') url diff --git a/src/main/Main.hs b/src/main/Main.hs deleted file mode 100644 index 71c9841..0000000 --- a/src/main/Main.hs +++ /dev/null @@ -1,112 +0,0 @@ -{-# LANGUAGE OverloadedStrings #-} -{- -Copyright (C) 2015-2016 Ramakrishnan Muthukrishnan - -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 --} - -module Main where - -import Prelude hiding (log, length, readFile, getContents) - -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 - -exit :: IO ByteString -exit = exitSuccess - -usage :: IO () -usage = putStrLn "usage: functorrent torrent-file" - -parse :: [String] -> IO ByteString -parse [] = getContents -parse [a] = do - fileExist <- doesFileExist a - if fileExist - then readFile a - 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 - -- 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 diff --git a/stack.yaml b/stack.yaml deleted file mode 100644 index 5b69a9a..0000000 --- a/stack.yaml +++ /dev/null @@ -1,37 +0,0 @@ -# For more information, see: https://github.com/commercialhaskell/stack/blob/release/doc/yaml_configuration.md - -# Override default flag values for local packages and extra-deps -flags: {} - -# Local packages, usually specified by relative directory name -packages: - -# Local packages, usually specified by relative directory name -- '.' - -# Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3) -extra-deps: [] - -# Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2) -resolver: nightly-2016-06-19 - -rebuild-ghc-options: true -ghc-options: - # All packages - "*": -Wall # -fwarn-incomplete-uni-patterns -fwarn-incomplete-record-updates -fwarn-monomorphism-restriction -fwarn-auto-orphans -fwarn-implicit-prelude -fwarn-missing-local-sigs -fwarn-missing-exported-sigs -fwarn-missing-import-lists -fwarn-identities - some-package: -DSOME_CPP_FLAG - -# Control whether we use the GHC we find on the path -# system-ghc: true - -# Require a specific version of stack, using version ranges -# require-stack-version: -any # Default -# require-stack-version: >= 1.0.0 - -# Override the architecture used by stack, especially useful on Windows -# arch: i386 -# arch: x86_64 - -# Extra directories used by stack for building -# extra-include-dirs: [/path/to/dir] -# extra-lib-dirs: [/path/to/dir] diff --git a/test/BencodeTests.hs b/test/BencodeTests.hs deleted file mode 100644 index c83e9cc..0000000 --- a/test/BencodeTests.hs +++ /dev/null @@ -1,17 +0,0 @@ -module BencodeTests (tests) where - -import FuncTorrent.Bencode (encode, decode, BVal(..)) - -import Test.Tasty (TestTree, testGroup) -import Test.Tasty.QuickCheck (testProperty) - -propEncodeDecode :: BVal -> Bool -propEncodeDecode bval = let encoded = encode bval - decoded = decode encoded - in Right bval == decoded - -qcTests :: TestTree -qcTests = testGroup "QuickCheck tests" [ testProperty "encode/decode" propEncodeDecode ] - -tests :: TestTree -tests = testGroup "Tests" [qcTests] diff --git a/test/Test.hs b/test/Test.hs deleted file mode 100644 index 71b9f1c..0000000 --- a/test/Test.hs +++ /dev/null @@ -1,101 +0,0 @@ -{-# LANGUAGE OverloadedStrings #-} -module Main where - -import Prelude hiding (readFile) - -import Data.ByteString (ByteString, readFile) -import Data.Map.Strict (fromList) - -import Test.Tasty (TestTree, testGroup, defaultMain) -import Test.Tasty.HUnit (testCase, (@?=)) - -import FuncTorrent.Bencode (encode, decode, BVal(..)) -import FuncTorrent.Metainfo (Info(..), Metainfo(..), mkMetaInfo) -import FuncTorrent.Peer (Peer(..)) -import FuncTorrent.Tracker - -import qualified BencodeTests - --- Parsed .torrent file -file :: BVal -file = Bdict (fromList [ - ("announce",Bstr "http://9.rarbg.com:2710/announce"), - ("comment",Bstr "hello world"), - ("created by",Bstr "Jaseem Abid"), - ("creation date",Bint 1428717851), - ("encoding",Bstr "UTF-8"), - ("info",Bdict (fromList [ - ("length",Bint 12), - ("name",Bstr "hello.txt"), - ("piece length",Bint 32768), - ("pieces",Bstr "\"Ycc\179\222@\176o\152\US\184]\130\&1.\140\SO\213\DC1"), - ("private",Bint 0)]))]) - -hello :: Metainfo -hello = Metainfo { - info = Info { - pieceLength = 32768, - pieces = "\"Ycc\179\222@\176o\152\US\184]\130\&1.\140\SO\213\DC1", - private = Nothing, - name = "hello.txt", - lengthInBytes = 12, - md5sum = Nothing - }, - announceList = ["http://9.rarbg.com:2710/announce"], - creationDate = Just 1428717851, - comment = Just "hello world", - createdBy = Just "Jaseem Abid", - encoding = Just "UTF-8", - infoHash = "\205CX(;\163 expected @?= file - Left _ -> error "Failed parsing test file" - - -testMkMetaInfo :: TestTree -testMkMetaInfo = testCase "Should mkInfo valid torrent files" $ do - str <- readFile "./data/hello.txt.torrent" - case decode str of - Right expected -> mkMetaInfo expected @?= Just hello - Left _ -> error "Failed parsing test file" - -testResponse1 :: TestTree -testResponse1 = testCase "Should parse valid tracker response" $ do - str <- readFile "./data/debian-7.8.0-amd64-CD-1.iso.cache" - case decode str of - Right bval -> expectation @?= mkTrackerResponse bval - Left _ -> error "Failed parsing test file" - where - expectation :: Either a TrackerResponse - expectation = Right TrackerResponse { - interval = Just 900, - peers = [Peer "" "85.25.201.101" 51413, Peer "" "37.59.28.236" 22222, Peer "" "76.21.149.43" 51866, Peer "" "31.183.33.205" 43467, Peer "" "213.210.120.86" 27480, Peer "" "213.239.216.205" 6914, Peer "" "91.192.163.152" 11834, Peer "" "62.210.240.65" 6999, Peer "" "84.250.103.161" 6949, Peer "" "88.195.241.192" 51413, Peer "" "88.165.61.223" 6881, Peer "" "86.157.234.243" 59583, Peer "" "213.41.137.242" 51413, Peer "" "91.10.84.195" 46941, Peer "" "64.56.249.183" 7023, Peer "" "202.62.16.71" 59929, Peer "" "31.43.126.122" 57816, Peer "" "68.169.133.72" 50222, Peer "" "223.135.97.177" 58813, Peer "" "5.166.93.118" 64459, Peer "" "200.148.109.141" 51413, Peer "" "109.226.236.160" 44444, Peer "" "78.58.139.154" 22818, Peer "" "188.244.47.186" 39643, Peer "" "203.86.204.111" 52411, Peer "" "80.110.40.98" 6918, Peer "" "68.187.142.217" 58352, Peer "" "71.115.139.180" 63065, Peer "" "70.169.35.173" 51413, Peer "" "185.3.135.186" 10889, Peer "" "88.198.224.202" 51413, Peer "" "183.157.65.217" 9179, Peer "" "87.251.189.150" 46680, Peer "" "87.114.202.174" 12393, Peer "" "93.58.5.16" 51411, Peer "" "89.102.9.69" 10044, Peer "" "94.159.19.222" 15783, Peer "" "95.28.49.176" 58794, Peer "" "217.114.58.135" 6881, Peer "" "79.141.162.38" 35806, Peer "" "136.169.50.72" 54927, Peer "" "187.67.188.151" 51413, Peer "" "79.111.218.50" 53636, Peer "" "62.75.137.129" 51413, Peer "" "14.204.20.156" 11600, Peer "" "79.141.162.34" 24531, Peer "" "82.144.192.7" 63208, Peer "" "212.34.231.10" 20684, Peer "" "95.225.246.221" 51413, Peer "" "124.41.237.102" 24874], - complete = Nothing, - incomplete = Nothing - } - -testResponse2 :: TestTree -testResponse2 = testCase "Should parse invalid tracker response" $ do - str <- readFile "./data/debian-7.8.0-amd64-CD-1.iso.error" - case decode str of - Right bval -> expectation @?= mkTrackerResponse bval - Left _ -> error "Failed parsing test file" - where - expectation :: Either ByteString a - expectation = Left "torrent not found" - - -unitTests :: TestTree -unitTests = testGroup "Unit tests" [testFile, testMkMetaInfo, testResponse1, - testResponse2] - -tests :: TestTree -tests = testGroup "Tests" [unitTests, BencodeTests.tests] - -main :: IO () -main = defaultMain tests