Initial commit

LICENSE

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+Copyright Zesen Qian (c) 2016
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Zesen Qian nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Setup.hs

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+import Distribution.Simple
+main = defaultMain

src/Network/TUNTAP.hsc

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+{-# LANGUAGE ForeignFunctionInterface #-}
+module Network.TUNTAP where
+
+import Foreign
+import Foreign.C.String
+
+import Data.Bits
+
+import System.Posix.IOCtl
+
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <linux/if.h>
+#include <linux/if_tun.h>
+
+data Flag = TUN | TAP | NO_PI | MULTI_QUEUE
+  deriving (Eq)
+
+data Ifreq = Ifreq { flags :: [Flag]
+                   , name :: String}
+
+sheet = [ (#{const IFF_TUN}, TUN)
+        , (#{const IFF_TAP}, TAP)
+        , (#{const IFF_NO_PI}, NO_PI)
+        , (#{const IFF_MULTI_QUEUE}, MULTI_QUEUE)
+        ]
+
+instance Storable Ifreq where
+  alignment _ = #{alignment struct ifreq}
+  sizeOf _ = #{size struct ifreq}
+  peek ptr = do 
+    flags_ <- #{peek struct ifreq, ifr_flags} ptr :: IO (#{type typeof(((struct ifreq *)0)->ifr_flags)})
+    let flags = foldr (\a b -> if ((fst a) .&. flags_) /= 0 then (snd a) : b else b) [] sheet 
+    name <- peekCString $ #{ptr struct ifreq, ifr_name} ptr
+    return (Ifreq flags name)
+  poke ptr (Ifreq flags name) = do
+    #{poke struct ifreq, ifr_flags} ptr
+      ((foldr (\a b -> if elem (snd a) flags then b .|. (fst a) else b) 0 sheet) :: #{type typeof(((struct ifreq *)0)->ifr_flags)})
+    withCStringLen (take maxLen name) $ uncurry (copyArray $ #{ptr struct ifreq, ifr_name} ptr)
+    where maxLen = #{const IFNAMSIZ}
+
+--foreign import ccall "tunsetiff" tunsetiff :: CInt
+
+data TUNSETIFF = TUNSETIFF
+
+instance IOControl TUNSETIFF Ifreq where
+  ioctlReq _ = #{const TUNSETIFF}

tuntap-simple.cabal

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+name:                tuntap-simple
+version:             0.1.0.0
+synopsis:            A simple tun/tap library
+description:         Please see README.md
+homepage:            https://github.com/riaqn/tuntap-simple#readme
+license:             BSD3
+license-file:        LICENSE
+author:              Zesen Qian
+maintainer:          haskell@riaqn.org
+copyright:           GPL3
+category:            Network
+build-type:          Simple
+-- extra-source-files:
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Network.TUNTAP
+  build-depends:       base >= 4.7 && < 5
+                     , ioctl
+  default-language:    Haskell2010
+  default-extensions:  MultiParamTypeClasses
+
+source-repository head
+  type:     git
+  location: https://github.com/riaqn/tuntap-simple