blob: 1c2ac2ebafc9f5334e1e63f15b09ac6444f02432 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
-- |
-- Copyright : (c) Sam T. 2013
-- License : MIT
-- Maintainer : pxqr.sta@gmail.com
-- Stability : experimental
-- Portability : non-portable
--
{-# LANGUAGE OverloadedStrings #-}
{-# OPTIONS -fno-warn-orphans #-}
module Network.BitTorrent.Peer.Addr
( PeerAddr(..)
, peerSockAddr, connectToPeer
, ppPeer
) where
import Control.Applicative
import Data.BEncode
import Data.Bits
import Data.Word
import Network
import Network.Socket
import Network.BitTorrent.Peer.ID
import Network.BitTorrent.Peer.ClientInfo
data PeerAddr = PeerAddr {
peerID :: Maybe PeerID
, peerIP :: HostAddress
, peerPort :: PortNumber
} deriving (Show, Eq)
instance BEncodable PortNumber where
toBEncode = toBEncode . fromEnum
fromBEncode b = toEnum <$> fromBEncode b
instance BEncodable PeerAddr where
toBEncode (PeerAddr pid pip pport) = fromAssocs
[ "peer id" -->? pid
, "ip" --> pip
, "port" --> pport
]
fromBEncode (BDict d) =
PeerAddr <$> d >--? "peer id"
<*> d >-- "ip"
<*> d >-- "port"
fromBEncode _ = decodingError "PeerAddr"
-- TODO make platform independent, clarify htonl
-- | Convert peer info from tracker response to socket address.
-- Used for establish connection between peers.
--
peerSockAddr :: PeerAddr -> SockAddr
peerSockAddr = SockAddrInet <$> (g . peerPort) <*> (htonl . peerIP)
where
htonl :: Word32 -> Word32
htonl d =
((d .&. 0xff) `shiftL` 24) .|.
(((d `shiftR` 8 ) .&. 0xff) `shiftL` 16) .|.
(((d `shiftR` 16) .&. 0xff) `shiftL` 8) .|.
((d `shiftR` 24) .&. 0xff)
g :: PortNumber -> PortNumber
g = id
-- | Tries to connect to peer using reasonable default parameters.
connectToPeer :: PeerAddr -> IO Socket
connectToPeer p = do
sock <- socket AF_INET Stream Network.Socket.defaultProtocol
connect sock (peerSockAddr p)
return sock
ppPeer :: PeerAddr -> String
ppPeer p = maybe "" (++ " at ") ((ppClientInfo . clientInfo) <$> peerID p)
++ show (peerSockAddr p)
|
