gdritter repos ucspi-hs / 3309a0b
UCSPI library in basic working state sans documentation Getty Ritter 6 years ago
4 changed file(s) with 96 addition(s) and 0 deletion(s). Collapse all Expand all
1 Copyright (c) 2015, Getty Ritter
2
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met:
7
8 * Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10
11 * Redistributions in binary form must reproduce the above
12 copyright notice, this list of conditions and the following
13 disclaimer in the documentation and/or other materials provided
14 with the distribution.
15
16 * Neither the name of Getty Ritter nor the names of other
17 contributors may be used to endorse or promote products derived
18 from this software without specific prior written permission.
19
20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1 module Network.UCSPI where
2
3 import Control.Arrow (first)
4 import Data.List (stripPrefix)
5 import System.IO (Handle, hPutStrLn, stderr)
6 import System.Posix.IO (fdToHandle)
7 import System.Posix.Types (Fd(..))
8 import System.Environment (getEnvironment)
9
10 data UCSPIOptions = UCSPIOptions
11 { ucspiProtocol :: String
12 , ucspiLocalVars :: [(String,String)]
13 , ucspiRemoteVars :: [(String,String)]
14 } deriving (Eq, Show)
15
16 gatherOptions :: [(String,String)] -> Maybe UCSPIOptions
17 gatherOptions envs = do
18 proto <- lookup "PROTO" envs
19 let locals = [ (k, v) | let pr = proto ++ "LOCAL"
20 , (Just k, v) <- map (first (stripPrefix pr)) envs
21 ]
22 let remotes = [ (k, v) | let pr = proto ++ "REMOTE"
23 , (Just k, v) <- map (first (stripPrefix pr)) envs
24 ]
25 return $ UCSPIOptions
26 { ucspiProtocol = proto
27 , ucspiLocalVars = locals
28 , ucspiRemoteVars = remotes
29 }
30
31
32 ucspiClient :: (UCSPIOptions -> Handle -> Handle -> IO ()) -> IO ()
33 ucspiClient client = do
34 opts <- gatherOptions `fmap` getEnvironment
35 case opts of
36 Nothing -> hPutStrLn stderr "Non-conformant UCSPI client: no PROTO supplied"
37 Just opts' -> do
38 rdH <- fdToHandle (Fd 6)
39 wrH <- fdToHandle (Fd 7)
40 client opts' rdH wrH
41
42 ucspiServer :: (UCSPIOptions -> IO ()) -> IO ()
43 ucspiServer server = do
44 opts <- gatherOptions `fmap` getEnvironment
45 case opts of
46 Nothing -> hPutStrLn stderr "Non-conformant UCSPI server: no PROTO supplied"
47 Just opts' -> server opts'
1 import Distribution.Simple
2 main = defaultMain
1 name: ucspi-hs
2 version: 0.1.0.0
3 synopsis: A small Haskell interface to writing @ucspi@-conformant applications
4 -- description:
5 license: BSD3
6 license-file: LICENSE
7 author: Getty Ritter
8 maintainer: gettylefou@gmail.com
9 copyright: © 2015 Getty Ritter
10 category: Network
11 build-type: Simple
12 cabal-version: >=1.10
13
14 library
15 exposed-modules: Network.UCSPI
16 build-depends: base >=4.7 && <4.8, unix >=2.7 && <2.8
17 default-language: Haskell2010