正在努力找出如何正确地使用OpenSSAPI
假设实现一个stunnel-style ssl-wrapper,可以这么做:
runProxy :: PortID -> AddrInfo -> IO ()
runProxy localPort@(PortNumber lpn) serverAddrInfo = do
listener <- listenOn localPort
forever $ do
(sClient, clientAddr) <- accept listener
let finalize sServer = do
sClose sServer
sClose sClient
forkIO $ do
tidToServer <- myThreadId
bracket (connectToServer serverAddrInfo) finalize $ \sServer -> do
-- execute one 'copySocket' thread for each data direction
-- and make sure that if one direction dies, the other gets
-- pulled down as well
bracket (forkIO (copySocket sServer sClient
`finally` killThread tidToServer))
(killThread) $ \_ -> do
copySocket sClient sServer -- "controlling" thread
where
-- |Copy data from source to dest until EOF occurs on source
-- Copying may also be aborted due to exceptions
copySocket :: Socket -> Socket -> IO ()
copySocket src dst = go
where
go = do
buf <- B.recv src 4096
unless (B.null buf) $ do
B.sendAll dst buf
go
-- |Create connection to given AddrInfo target and return socket
connectToServer saddr = do
sServer <- socket (addrFamily saddr) Stream defaultProtocol
connect sServer (addrAddress saddr)
return sServer
如何将上述框架转换为full-duplex ssl-wrapping tcp-forwarding proxy
?
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