mptcp-pm (empty) → 0.0.1
raw patch · 14 files changed
+3053/−0 lines, 14 filesdep +HUnitdep +aesondep +basesetup-changed
Dependencies added: HUnit, aeson, base, bytestring, bytestring-conversion, c2hsc, cereal, containers, fast-logger, ip, netlink, optparse-applicative, process
Files
- CHANGELOG +3/−0
- LICENSE +674/−0
- Net/IPAddress.hs +101/−0
- Net/Mptcp.hs +422/−0
- Net/SockDiag.hs +484/−0
- Net/Tcp.hs +59/−0
- README.md +68/−0
- Setup.hs +2/−0
- headers/tcp_states.h +52/−0
- hs/daemon.hs +855/−0
- hs/monitor.hs +68/−0
- hs/test.hs +65/−0
- mptcp-pm.cabal +114/−0
- test/Main.hs +86/−0
+ CHANGELOG view
@@ -0,0 +1,3 @@+v0.0.1:+- addition of 100s of bugs+- will mess up your mind
+ LICENSE view
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Of course, your program's commands+might be different; for a GUI interface, you would use an "about box".++ You should also get your employer (if you work as a programmer) or school,+if any, to sign a "copyright disclaimer" for the program, if necessary.+For more information on this, and how to apply and follow the GNU GPL, see+<http://www.gnu.org/licenses/>.++ The GNU General Public License does not permit incorporating your program+into proprietary programs. 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+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+ Net/IPAddress.hs view
@@ -0,0 +1,101 @@+-- |+-- Module : Ip+-- Copyright : teto 2019+-- License : GPL3+--+-- Description+--+{-# OPTIONS_GHC -fno-warn-orphans #-}+module Net.IPAddress+where+import Net.IP+import Net.IPv4+import Net.IPv6+import Data.Serialize.Get+import Data.Serialize.Put+import Data.Word (Word32)+import Data.ByteString (ByteString)++-- for replicateM+import Control.Monad+++-- check ip link / localhost seems to be 1+-- global interface index+localhostIntfIdx :: Word32+localhostIntfIdx = 1+++-- then I could do encode myIP+-- instance Convertable IP where+-- getPut = putIPAddress+-- getGet _ = getIPAddress++-- TODO I could use Serialize for IP instead+-- instance Serialize IP where++getIPv4FromByteString :: ByteString -> Either String IPv4+getIPv4FromByteString val =+ runGet (Net.IPv4.fromOctets <$> getWord8 <*> getWord8 <*> getWord8 <*> getWord8) val+++getIPv6FromByteString :: ByteString -> Either String IPv6+getIPv6FromByteString bs =+ -- returns a list to me+ -- <$> replicateM 16 (getWord8) in+ -- TODO check ?+ let+ val = Net.IPv6.fromWord32s <$> getWord32be <*> getWord32be <*> getWord32be <*> getWord32be+ in+ runGet val bs++-- TODO pass the type ?+-- getIPAddressFromByteString :: ByteString -> Maybe IP+-- getIPAddressFromByteString bstr =+-- let+-- -- val = (fromOctets <$> getWord8 <*> getWord8 <*> getWord8 <*> getWord8)+-- -- probably could use Word32 instead ?+-- in+-- case runGet val bstr of+-- Left err -> error "maybe it was an ipv6"+-- Right ip -> Just $ fromIPv4 ip+ --+ -- fromIPv6 c+++-- big endian for IDiag+-- replicateM 4 (putWord32be $ dst cust) -- dest+-- assuming it's an ipv4+-- valid for the ip v 4 only+-- one constructor is getIPv4 :: Word32+putIPAddress :: IP -> Put+putIPAddress addr =+ case_ putIPv4Address putIPv6Address addr++-- the doc should show the MSB+putIPv6Address :: IPv6 -> Put+putIPv6Address addr =+ let+ (w1, w2, w3, w4) = toWord32s addr+ in do+ putWord32be w1+ putWord32be w2+ putWord32be w3+ putWord32be w4++-- |IDIag version since it will add some padding to reach 128 bits+putIPv4Address :: IPv4 -> Put+putIPv4Address addr =+ let+ w32 = getIPv4 addr+ -- (ip1, ip2, ip3, ip4) = toOctets $ addr+ in do+ putWord32be w32+ -- mapM_ putWord8 t+ -- putWord8 ip1+ -- putWord8 ip2+ -- putWord8 ip3+ -- putWord8 ip4+ replicateM_ 3 (putWord32be 0)++
+ Net/Mptcp.hs view
@@ -0,0 +1,422 @@+{-|+Module : MPTCP+Description : Implementation of mptcp netlink path manager+Maintainer : matt+Stability : testing+Portability : Linux++-}+{-# LANGUAGE DeriveGeneric #-}+module Net.Mptcp+where++import Generated+import Net.SockDiag ()+import Control.Exception (assert)++import Data.Word (Word8, Word16, Word32)+import qualified Data.Map as Map+import System.Linux.Netlink hiding (makeSocket)+-- import System.Linux.Netlink (query, Packet(..))+import System.Linux.Netlink.GeNetlink+import System.Linux.Netlink.Constants+-- import System.Linux.Netlink.GeNetlink.Control+import Data.ByteString (ByteString)+import Data.Maybe (fromJust)++import Data.Serialize.Get+import Data.Serialize.Put++import Data.Bits ((.|.))++import Data.List ()+import Debug.Trace+import Control.Concurrent ()+import Net.IP+import Net.Tcp+import Net.IPAddress+import Net.IPv4+import Net.IPv6+-- in package Unique-0.4.7.6+-- import Data.List.Unique+import Data.Aeson+import GHC.Generics+-- import Data.Default++-- how can I retreive the word16 without pattern matching ?+data MptcpSocket = MptcpSocket NetlinkSocket Word16+instance Show MptcpSocket where+ show sock = let (MptcpSocket nlSock fid) = sock in ("Mptcp netlink socket: " ++ show fid)++-- isIPv4address+-- |Data to hold subflows information+-- use http://hackage.haskell.org/package/data-default-0.5.3/docs/Data-Default.html+-- data default to provide default values++-- prevents hie from working correctly ?!+-- instance Default TcpConnection where+-- def = TcpConnection {+-- srcIp = fromIPv4 Net.IPv4.localhost+-- , dstIp = fromIPv4 Net.IPv4.localhost+-- , srcPort = 0+-- , dstPort = 0+-- , priority = Nothing+-- , localId = 0+-- , remoteId = 0+-- , inetFamily = eAF_INET+-- , subflowInterface = Nothing+-- }+++type MptcpPacket = GenlPacket NoData+++-- |Data to hold MPTCP level information+data MptcpConnection = MptcpConnection {+ connectionToken :: MptcpToken+ , subflows :: [TcpConnection]+ , localIds :: [Word8] -- ^ Announced addresses+ , remoteIds :: [Word8] -- ^ Announced addresses+} deriving (Show, Generic)+++instance FromJSON MptcpConnection+instance ToJSON MptcpConnection+++-- TODO add to localIds+mptcpConnAddSubflow :: MptcpConnection -> TcpConnection -> MptcpConnection+mptcpConnAddSubflow mptcpConn subflow =+ mptcpConn {+ subflows = subflow : subflows mptcpConn+ , localIds = localId subflow : localIds mptcpConn+ , remoteIds = remoteId subflow : remoteIds mptcpConn+ }++mptcpConnAddLocalId :: MptcpConnection+ -> Word8 -- ^ Local id to add+ -> MptcpConnection+mptcpConnAddLocalId con locId = undefined+++-- TODO remove subflow+mptcpConnRemoveSubflow :: MptcpConnection -> TcpConnection -> MptcpConnection+mptcpConnRemoveSubflow mptcpConn subflow = undefined++getPort :: ByteString -> Word16+getPort val =+ case (runGet getWord16host val) of+ Left _ -> 0+ Right port -> port++++-- TODO merge default attributes+-- todo pass a list of (Int, Bytestring) and build the map with fromList ?+{-|+ Generates an Mptcp netlink request+-}+genMptcpRequest :: Word16 -- ^ the family id+ -> MptcpGenlEvent -- ^The MPTCP command+ -> Bool -- ^Dump answer (returns EOPNOTSUPP if not possible)+ -- -> Attributes+ -> [MptcpAttribute]+ -> MptcpPacket+genMptcpRequest fid cmd dump attrs =+ let+ -- The message type/ flag / sequence number / pid (0 => from the kernel)+ -- https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/netlink.h#L54+ myHeader = Header (fromIntegral fid) (flags .|. fNLM_F_ACK) 0 0+ geheader = GenlHeader word8Cmd mptcpGenlVer+ flags = if dump then fNLM_F_REQUEST .|. fNLM_F_MATCH .|. fNLM_F_ROOT else fNLM_F_REQUEST+ word8Cmd = fromIntegral (fromEnum cmd) :: Word8++ pkt = Packet myHeader (GenlData geheader NoData) (mptcpListToAttributes attrs)+ -- TODO run an assert on the list filter+ hasTokenAttr = Prelude.any (isAttribute (MptcpAttrToken 0)) attrs+ in+ assert hasTokenAttr pkt++readToken :: Maybe ByteString -> MptcpToken+readToken maybeVal = case maybeVal of+ Nothing -> error "Missing token"+ Just val -> case ( runGet getWord32host val) of+ Left err -> error "could not decode"+ Right mptcpToken -> mptcpToken++-- LocId => Word8+readLocId :: Maybe ByteString -> LocId+readLocId maybeVal = case maybeVal of+ Nothing -> error "Missing locator id"+ Just val -> case runGet getWord8 val of+ -- TODO generate an error here !+ Left _ -> 0+ Right locId -> locId+ -- runGet getWord8 val++-- inspectResult :: MyState -> Either String MptcpPacket -> IO()+-- inspectResult myState result = case result of+-- Left ex -> putStrLn $ "An error in parsing happened" ++ show ex+-- -- Right myPack -> dispatchPacket myState myPack >> putStrLn "Valid packet"+-- Right myPack -> putStrLn "inspect result Valid packet"+++-- doDumpLoop :: MyState -> IO MyState+-- doDumpLoop myState = do+-- let (MptcpSocket simpleSock fid) = socket myState+-- results <- recvOne' simpleSock :: IO [Either String MptcpPacket]+-- -- TODO retrieve packets+-- mapM_ (inspectResult myState) results+-- newState <- doDumpLoop myState+-- return newState+++data MptcpAttributes = MptcpAttributes {+ connToken :: Word32+ , localLocatorID :: Maybe Word8+ , remoteLocatorID :: Maybe Word8+ , family :: Word16 -- Remove ?+ -- |Pointer to the Attributes map used to build this struct. This is purely+ -- |for forward compat, please file a feature report if you have to use this.+ , staSelf :: Attributes+} deriving (Show, Eq, Read)++-- Wouldn't it be easier to work with ?+-- data MptcpEvent = NewConnection {+-- }+++data MptcpAttribute =+ MptcpAttrToken MptcpToken |+ -- v4 or v6, AddressFamily is a netlink def+ SubflowFamily AddressFamily |+ -- remote/local ?+ RemoteLocatorId Word8 |+ LocalLocatorId Word8 |+ SubflowSourceAddress IP |+ SubflowDestAddress IP |+ SubflowSourcePort Word16 |+ SubflowDestPort Word16 |+ SubflowMaxCwnd Word32 |+ SubflowBackup Word8 |+ SubflowInterface Word32+ deriving (Show, Eq)++type MptcpToken = Word32+type LocId = Word8++-- inspired by netlink cATA :: CtrlAttribute -> (Int, ByteString)+attrToPair :: MptcpAttribute -> (Int, ByteString)+attrToPair (MptcpAttrToken token) = (fromEnum MPTCP_ATTR_TOKEN, runPut $ putWord32host token)+attrToPair (RemoteLocatorId loc) = (fromEnum MPTCP_ATTR_REM_ID, runPut $ putWord8 loc)+attrToPair (LocalLocatorId loc) = (fromEnum MPTCP_ATTR_LOC_ID, runPut $ putWord8 loc)+attrToPair (SubflowFamily fam) = let+ fam8 = (fromIntegral $ fromEnum fam) :: Word16+ in (fromEnum MPTCP_ATTR_FAMILY, runPut $ putWord16host fam8)++attrToPair ( SubflowInterface idx) = (fromEnum MPTCP_ATTR_IF_IDX, runPut $ putWord32host idx)+attrToPair ( SubflowSourcePort port) = (fromEnum MPTCP_ATTR_SPORT, runPut $ putWord16host port)+attrToPair ( SubflowDestPort port) = (fromEnum MPTCP_ATTR_DPORT, runPut $ putWord16host port)+attrToPair ( SubflowMaxCwnd limit) = (fromEnum MPTCP_ATTR_CWND, runPut $ putWord32host limit)+attrToPair ( SubflowBackup prio) = (fromEnum MPTCP_ATTR_BACKUP, runPut $ putWord8 prio)+-- TODO should depend on the ip putWord32be w32+attrToPair ( SubflowSourceAddress addr) =+ case_ (genV4SubflowAddress MPTCP_ATTR_SADDR4) (genV6SubflowAddress MPTCP_ATTR_SADDR6) addr+attrToPair ( SubflowDestAddress addr) =+ case_ (genV4SubflowAddress MPTCP_ATTR_DADDR4) (genV6SubflowAddress MPTCP_ATTR_DADDR6) addr+++genV4SubflowAddress :: MptcpAttr -> IPv4 -> (Int, ByteString)+genV4SubflowAddress attr ip = (fromEnum attr, runPut $ putWord32be w32)+ where+ w32 = getIPv4 ip++genV6SubflowAddress :: MptcpAttr -> IPv6 -> (Int, ByteString)+genV6SubflowAddress addr = undefined+-- (fromEnum MPTCP_ATTR_SADDR6, runPut $ putIPAddress addr)++mptcpListToAttributes :: [MptcpAttribute] -> Attributes+mptcpListToAttributes attrs = Map.fromList $map attrToPair attrs+++-- mptcpAttributesToMap :: [MptcpAttribute] -> Attributes+-- mptcpAttributesToMap attrs =+-- Map.fromList $map mptcpAttributeToTuple attrs++-- TODO simplify+subflowFromAttributes :: Attributes -> TcpConnection+subflowFromAttributes attrs =+ -- makeAttribute Int ByteString+ let+ -- expects a ByteString+ (SubflowSourcePort sport) = fromJust $ makeAttributeFromMaybe MPTCP_ATTR_SPORT attrs+ (SubflowDestPort dport) = fromJust $ makeAttributeFromMaybe MPTCP_ATTR_DPORT attrs+ SubflowSourceAddress _srcIp = case makeAttributeFromMaybe MPTCP_ATTR_SADDR4 attrs of+ Just ip -> ip+ Nothing -> case makeAttributeFromMaybe MPTCP_ATTR_SADDR6 attrs of+ Just ip -> ip+ Nothing -> error "could not get the src IP"+ SubflowDestAddress _dstIp = case makeAttributeFromMaybe MPTCP_ATTR_DADDR4 attrs of+ Just ip -> ip+ Nothing -> case makeAttributeFromMaybe MPTCP_ATTR_DADDR6 attrs of+ Just ip -> ip+ Nothing -> error "could not get the dest IP"+ (LocalLocatorId lid) = fromJust $ makeAttributeFromMaybe MPTCP_ATTR_LOC_ID attrs+ (RemoteLocatorId rid) = fromJust $ makeAttributeFromMaybe MPTCP_ATTR_REM_ID attrs+ (SubflowInterface intfId) = fromJust $ makeAttributeFromMaybe MPTCP_ATTR_IF_IDX attrs+ sfFamily = getPort $ fromJust (Map.lookup (fromEnum MPTCP_ATTR_FAMILY) attrs)+ prio = Nothing -- (SubflowPriority N)+ in+ TcpConnection _srcIp _dstIp sport dport prio lid rid eAF_INET (Just intfId)++-- makeSubflowFromAttributes ::++-- TODO prefix with 'e' for enum+-- Map.lookup (fromEnum attr) m+-- getAttribute :: MptcpAttr -> Attributes -> Maybe MptcpAttribute+-- getAttribute attr m+-- | attr == MPTCP_ATTR_TOKEN = Nothing+-- | otherwise = Nothing++-- getAttribute :: (Int, ByteString) -> CtrlAttribute+-- getAttribute (i, x) = fromMaybe (CTRL_ATTR_UNKNOWN i x) $makeAttribute i x++-- getW16 :: ByteString -> Maybe Word16+-- getW16 x = e2M (runGet g16 x)++-- getW32 :: ByteString -> Maybe Word32+-- getW32 x = e2M (runGet g32 x)++-- "either2Maybe"+e2M :: Either a b -> Maybe b+e2M (Right x) = Just x+e2M _ = Nothing++-- makeAttributeFromMap ::++-- makeAttributeFromList ::++-- TODO rename fromMap+makeAttributeFromMaybe :: MptcpAttr -> Attributes -> Maybe MptcpAttribute+makeAttributeFromMaybe attrType attrs =+ let res = Map.lookup (fromEnum attrType) attrs in+ case res of+ Nothing -> Nothing+ Just bytestring -> makeAttribute (fromEnum attrType) bytestring++-- | Builds an MptcpAttribute from+makeAttribute :: Int -- ^ MPTCP_ATTR_TOKEN value+ -> ByteString+ -> Maybe MptcpAttribute+makeAttribute i val =+ case toEnum i of+ MPTCP_ATTR_TOKEN -> Just (MptcpAttrToken $ readToken $ Just val)+ MPTCP_ATTR_FAMILY -> Just (SubflowFamily $ eAF_INET)+ MPTCP_ATTR_SADDR4 -> SubflowSourceAddress <$> fromIPv4 <$> e2M ( getIPv4FromByteString val)+ MPTCP_ATTR_DADDR4 -> SubflowDestAddress <$> fromIPv4 <$> e2M (getIPv4FromByteString val)+ MPTCP_ATTR_SADDR6 -> SubflowSourceAddress <$> fromIPv6 <$> e2M (getIPv6FromByteString val)+ MPTCP_ATTR_DADDR6 -> SubflowDestAddress <$> fromIPv6 <$> e2M (getIPv6FromByteString val)+ MPTCP_ATTR_SPORT -> SubflowSourcePort <$> port where port = e2M $ runGet getWord16host val+ MPTCP_ATTR_DPORT -> SubflowDestPort <$> port where port = e2M $ runGet getWord16host val+ MPTCP_ATTR_LOC_ID -> Just (LocalLocatorId $ readLocId $ Just val )+ MPTCP_ATTR_REM_ID -> Just (RemoteLocatorId $ readLocId $ Just val )+ MPTCP_ATTR_IF_IDX ->+ case runGet getWord32be val of+ Right x -> Just $ SubflowInterface x+ _ -> Nothing+ MPTCP_ATTR_BACKUP -> trace "makeAttribute BACKUP" Nothing+ MPTCP_ATTR_ERROR -> trace "makeAttribute ERROR" Nothing+ MPTCP_ATTR_TIMEOUT -> undefined+ MPTCP_ATTR_CWND -> undefined+ MPTCP_ATTR_FLAGS -> trace "makeAttribute ATTR_FLAGS" Nothing+ MPTCP_ATTR_UNSPEC -> undefined+++dumpAttribute :: Int -> ByteString -> String+dumpAttribute attrId value =+ -- TODO replace with makeAttribute followd by show ?+ -- traceShowId+ show $ makeAttribute attrId value++checkIfSocketExistsPkt :: Word16 -> [MptcpAttribute] -> MptcpPacket+checkIfSocketExistsPkt fid attributes =+ genMptcpRequest fid MPTCP_CMD_EXIST True attributes++-- https://stackoverflow.com/questions/47861648/a-general-way-of-comparing-constructors-of-two-terms-in-haskell?noredirect=1&lq=1+-- attrToPair ( SubflowSourcePort port) = (fromEnum MPTCP_ATTR_SPORT, runPut $ putWord8 loc)+isAttribute :: MptcpAttribute -- ^ to compare with+ -> MptcpAttribute -- ^to compare to+ -> Bool+isAttribute ref toCompare = fst (attrToPair toCompare) == fst (attrToPair ref)++hasLocAddr :: [MptcpAttribute] -> Bool+hasLocAddr attrs = Prelude.any (isAttribute (LocalLocatorId 0)) attrs++hasFamily :: [MptcpAttribute] -> Bool+hasFamily = Prelude.any (isAttribute (SubflowFamily eAF_INET))++-- need to prepare a request+-- type GenlPacket a = Packet (GenlData a)+-- REQUIRES: LOC_ID / TOKEN+resetConnectionPkt :: MptcpSocket -> [MptcpAttribute] -> MptcpPacket+resetConnectionPkt (MptcpSocket sock fid) attrs = let+ cmd = MPTCP_CMD_REMOVE+ in+ assert (hasLocAddr attrs) $ genMptcpRequest fid MPTCP_CMD_REMOVE False attrs+++subflowAttrs :: TcpConnection -> [MptcpAttribute]+subflowAttrs con = [+ LocalLocatorId $ localId con+ , RemoteLocatorId $ remoteId con+ -- TODO adapt+ , SubflowFamily $ eAF_INET -- inetFamily con+ , SubflowDestAddress $ dstIp con+ , SubflowDestPort $ dstPort con+ , SubflowInterface localhostIntfIdx+ -- https://github.com/multipath-tcp/mptcp/issues/338+ , SubflowSourceAddress $ srcIp con+ ]+++-- TODO pass a TcpConnection instead ?+capCwndAttrs :: MptcpToken -> TcpConnection -> Word32 -> [MptcpAttribute]+capCwndAttrs token sf cwnd = let+ capSubflowAttrs = [+ MptcpAttrToken token+ , SubflowMaxCwnd cwnd+ -- This should not be necessary anymore ?+ , SubflowSourcePort $ srcPort sf+ ] ++ (subflowAttrs sf)+ in+ capSubflowAttrs++capCwndPkt :: MptcpSocket -> [MptcpAttribute] -> MptcpPacket+capCwndPkt (MptcpSocket sock fid) attrs =+ assert (hasFamily attrs) pkt+ where+ pkt = genMptcpRequest fid MPTCP_CMD_SND_CLAMP_WINDOW False attrs+ -- attrs = [+ -- MptcpAttrToken token+ -- , SubflowFamily eAF_INET+ -- , LocalLocatorId 0+ -- -- TODO check emote locator ?+ -- , RemoteLocatorId 0+ -- , SubflowInterface localhostIntfIdx+ -- -- , SubflowInterface localhostIntfIdx+ -- ]+ -- putStrLn "while waiting for a real implementation"++-- sport/backup/intf are optional+-- family /loc id/remid/daddr/dport+-- TODO pass new subflow ?+newSubflowPkt :: MptcpSocket -> [MptcpAttribute] -> MptcpPacket+newSubflowPkt (MptcpSocket sock fid) attrs = let+ cmd = MPTCP_CMD_SUB_CREATE+ pkt = genMptcpRequest fid MPTCP_CMD_SUB_CREATE False attrs+ in+ assert (hasFamily attrs) pkt++-- announceLocalIdPkt ::+-- announceLocalIdPkt = +
+ Net/SockDiag.hs view
@@ -0,0 +1,484 @@+{-|+ ipSrc <- IPAddress . pack <$> replicateM (4*8) getWord8+ -- ipSrc = IPAddress . pack <$> replicateM (4*8) getWord8+ ipDst <- IPAddress . pack <$> replicateM (4*8) getWord8 +Module : IDiag+Description : Implementation of mptcp netlink path manager+Maintainer : matt+Stability : testing+Portability : Linux++-}+{-# LANGUAGE FlexibleInstances #-}+{-# LANGUAGE DeriveGeneric #-}+{-# LANGUAGE DeriveAnyClass #-}+module Net.SockDiag (+ InetDiagMsg (..)+ , genQueryPacket+ , loadExtension+ , showExtension+) where++-- import Generated+import Data.Word (Word8, Word16, Word32, Word64)++import Prelude hiding (length, concat)+import Prelude hiding (length, concat)++import Data.Maybe (fromJust)++import Data.Serialize+import Data.Serialize.Get ()+import Data.Serialize.Put ()++-- import Control.Monad (replicateM)++import System.Linux.Netlink+import System.Linux.Netlink.Constants+-- For TcpState, FFI generated+import Generated+-- (IDiagExt, TcpState, msgTypeSockDiag)++import qualified Data.Bits as B+import Data.Bits ((.|.))+import qualified Data.Map as Map+import Data.ByteString ()+import Data.ByteString.Char8 as C8 (unpack)+import Net.IPAddress+import Net.IP ()+-- import Net.IPv4+import Net.Tcp+import Data.ByteString (ByteString, pack, )++-- requires cabal as a dep+-- import Distribution.Utils.ShortText (decodeStringUtf8)+import GHC.Generics++-- iproute uses this seq number #define MAGIC_SEQ 123456+magicSeq :: Word32+magicSeq = 123456+++-- TODO provide constructor from Cookie+-- and one fronConnection+-- {| InetDiagFromCookie Word64+--+-- |}+data InetDiagSockId = InetDiagSockId {+ idiag_sport :: Word16+ , idiag_dport :: Word16++ -- Just be careful that this is a fixed size regardless of family+ -- __be32 idiag_src[4];+ -- __be32 idiag_dst[4];+ -- we don't know yet the address family+ , idiag_src :: ByteString+ , idiag_dst :: ByteString++ , idiag_intf :: Word32+ , idiag_cookie :: Word64++} deriving (Eq, Show)++{-# OPTIONS_GHC -Wno-incomplete-patterns #-}+++-- TODO we need a way to rebuild from the integer to the enum+class Enum2Bits a where+ -- toBits :: [a] -> Word32+ shiftL :: a -> Word32++instance Enum2Bits TcpState where+ -- toBits = enumsToWord+ shiftL state = B.shiftL 1 (fromEnum state)++instance Enum2Bits IDiagExt where+ -- toBits = enumsToWord+ shiftL state = B.shiftL 1 ((fromEnum state) - 1)++-- instance Enum2Bits INetDiag where+-- toBits = enumsToWord+++enumsToWord :: Enum2Bits a => [a] -> Word32+enumsToWord [] = 0+enumsToWord (x:xs) = (shiftL x) .|. (enumsToWord xs)++-- TODO use bitset package ? but broken on nixos+wordToEnums :: Enum2Bits a => Word32 -> [a]+wordToEnums _ = []++-- defined in include/uapi/linux/inet_diag.h+-- data InetDiagReq = InetDiagMsg {++-- {| This generates a response of inet_diag_msg+-- rename to answer ? |}+data InetDiagMsg = InetDiagMsg {+ idiag_family :: Word8+ , idiag_state :: Word8+ , idiag_timer :: Word8+ , idiag_retrans :: Word8+ , idiag_sockid :: InetDiagSockId+ , idiag_expires :: Word32+ , idiag_rqueue :: Word32+ , idiag_wqueue :: Word32+ , idiag_uid :: Word32+ , idiag_inode :: Word32+} deriving (Eq, Show)++-- see https://stackoverflow.com/questions/8633470/illegal-instance-declaration-when-declaring-instance-of-isstring+{-# LANGUAGE FlexibleInstances #-}++-- TODO this generates the error "Orphan instance: instance Convertable [TcpState]"+-- instance Convertable [TcpState] where+-- getPut = putStates+-- getGet _ = return []++putStates :: [TcpState] -> Put+putStates states = putWord32host $ enumsToWord states+++instance Convertable InetDiagMsg where+ getPut = putInetDiagMsg+ getGet _ = getInetDiagMsg++-- TODO rename to a TCP one ? SockDiagRequest+data SockDiagRequest = SockDiagRequest {+ sdiag_family :: Word8 -- ^AF_INET6 or AF_INET (TODO rename)+-- It should be set to the appropriate IPPROTO_* constant for AF_INET and AF_INET6, and to 0 otherwise.+ , sdiag_protocol :: Word8 -- ^IPPROTO_XXX always TCP ?+ -- IPv4/v6 specific structure+ , idiag_ext :: [IDiagExt] -- ^query extended info (word8 size)+ -- , req_pad :: Word8 -- ^ padding for backwards compatibility with v1++ -- in principle, any kind of state, but for now we only deal with TcpStates+ , idiag_states :: [TcpState] -- ^States to dump (based on TcpDump) Word32+ , diag_sockid :: InetDiagSockId -- ^inet_diag_sockid +} deriving (Eq, Show)++{- |Typeclase used by the system. Basically 'Storable' for 'Get' and 'Put'+getGet Returns a 'Get' function for the convertable.+The MessageType is passed so that the function can parse different data structures+based on the message type.+-}+-- class Convertable a where+-- getGet :: MessageType -> Get a -- ^get a 'Get' function for the static data+-- getPut :: a -> Put -- ^get a 'Put' function for the static data+instance Convertable SockDiagRequest where+ getPut = putSockDiagRequestHeader+ -- MessageType+ getGet _ = getSockDiagRequestHeader++-- |'Get' function for 'GenlHeader'+-- applicative style Trade <$> getWord32le <*> getWord32le <*> getWord16le+getSockDiagRequestHeader :: Get SockDiagRequest+getSockDiagRequestHeader = do+ addressFamily <- getWord8 -- AF_INET for instance+ protocol <- getWord8+ extended <- getWord32host+ _pad <- getWord8+ -- TODO discarded later+ states <- getWord32host+ _sockid <- getInetDiagSockid+ -- TODO reestablish states+ return $ SockDiagRequest addressFamily protocol + (wordToEnums extended :: [IDiagExt]) (wordToEnums states :: [TcpState]) _sockid++-- |'Put' function for 'GenlHeader'+putSockDiagRequestHeader :: SockDiagRequest -> Put+putSockDiagRequestHeader request = do+ -- let states = enumsToWord $ idiag_states request+ putWord8 $ sdiag_family request+ putWord8 $ sdiag_protocol request+ -- extended todo use Enum2Bits+ --putWord32host $ enumsToWord states+ putWord8 ( fromIntegral (enumsToWord $ idiag_ext request) :: Word8)+ putWord8 0 -- padding ?+ -- TODO check endianness+ putStates $ idiag_states request+ putInetDiagSockid $ diag_sockid request++-- | +-- Usually accompanied with attributes ?+getInetDiagMsg :: Get InetDiagMsg+getInetDiagMsg = do+ family <- getWord8+ state <- getWord8+ timer <- getWord8+ retrans <- getWord8++ _sockid <- getInetDiagSockid+ expires <- getWord32host+ rqueue <- getWord32host+ wqueue <- getWord32host+ uid <- getWord32host+ inode <- getWord32host+ return$ InetDiagMsg family state timer retrans _sockid expires rqueue wqueue uid inode++putInetDiagMsg :: InetDiagMsg -> Put+putInetDiagMsg msg = do+ putWord8 $ idiag_family msg+ putWord8 $ idiag_state msg+ putWord8 $ idiag_timer msg+ putWord8 $ idiag_retrans msg++ putInetDiagSockid $ idiag_sockid msg++ -- Network order+ putWord32le $ idiag_expires msg+ putWord32le $ idiag_rqueue msg+ putWord32le $ idiag_wqueue msg+ putWord32le $ idiag_uid msg+ putWord32le $ idiag_inode msg++-- TODO add support for OWDs+getInetDiagSockid :: Get InetDiagSockId+getInetDiagSockid = do+-- getWord32host+ sport <- getWord16host+ dport <- getWord16host+ -- iterate/ grow+ _src <- getByteString (4*4)+ _dst <- getByteString (4*4)+ _intf <- getWord32host+ cookie <- getWord64host+ return $ InetDiagSockId sport dport _src _dst _intf cookie++putInetDiagSockid :: InetDiagSockId -> Put+putInetDiagSockid cust = do+ -- we might need to clean up this a bit+ putWord16be $ idiag_sport cust+ putWord16be $ idiag_dport cust+ putByteString (idiag_src cust)+ putByteString (idiag_dst cust)+ -- putIPAddress (src cust)+ -- putIPAddress (dst cust)+ putWord32host $ idiag_intf cust+ putWord64host $ idiag_cookie cust++-- struct tcpvegas_info {+-- __u32 tcpv_enabled;+-- __u32 tcpv_rttcnt;+-- __u32 tcpv_rtt;+-- __u32 tcpv_minrtt;+-- };+-- data DiagVegasInfo = TcpVegasInfo {+-- -- TODO hide ?+-- tcpInfoVegasEnabled :: Word32+-- , tcpInfoRttCount :: Word32+-- , tcpInfoRtt :: Word32+-- , tcpInfoMinrtt :: Word32+-- }++-- instance Convertable DiagVegasInfo where+-- getPut = putDiagVegasInfo+-- getGet _ = getDiagVegasInfo+++-- putDiagVegasInfo :: -> Put+-- putDiagVegasInfo info = error "should not be needed"+++getDiagVegasInfo :: Get IDiagExtension+getDiagVegasInfo =+ TcpVegasInfo <$> getWord32host <*> getWord32host <*> getWord32host <*> getWord32host++-- TODO generate via FFI ?+eIPPROTO_TCP :: Word8+eIPPROTO_TCP = 6+++-- getTcpInfo :: Get IDiagExtension+-- getTcpInfo =+-- DiagTcpInfo <$> getWord8+-- Word8 Word8 Word8 Word8 Word8 Word8 Word8 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32 Word32++-- TODO generate with c2hsc ?+-- include/uapi/linux/inet_diag.h+data IDiagExtension = DiagTcpInfo {+ tcpi_state :: Word8,+ tcpi_ca_state :: Word8,+ tcpi_retransmits :: Word8,+ tcpi_probes :: Word8,+ tcpi_backoff :: Word8,+ tcpi_options :: Word8,+ tcpi_wscales :: Word8,+ -- tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4 :: Word8,++ tcpi_rto :: Word32,+ tcpi_ato :: Word32,+ tcpi_snd_mss :: Word32,+ tcpi_rcv_mss :: Word32,++ tcpi_unacked :: Word32,+ tcpi_sacked :: Word32,+ tcpi_lost :: Word32,+ tcpi_retrans :: Word32,+ tcpi_fackets :: Word32,++ -- Time+ tcpi_last_data_sent :: Word32,+ -- Not remembered, sorr+ tcpi_last_ack_sent :: Word32,+ tcpi_last_data_recv :: Word32,+ tcpi_last_ack_recv :: Word32,++ -- Metric+ tcpi_pmtu :: Word32,+ tcpi_rcv_ssthresh :: Word32,+ tcpi_rtt :: Word32,+ tcpi_rttvar :: Word32,+ tcpi_snd_ssthresh :: Word32,+ tcpi_snd_cwnd :: Word32,+ tcpi_advmss :: Word32,+ tcpi_reordering :: Word32,+ tcpi_rcv_rtt :: Word32,+ tcpi_rcv_space :: Word32,+ tcpi_total_retrans :: Word32++} | Meminfo {+ idiag_rmem :: Word32+, idiag_wmem :: Word32+, idiag_fmem :: Word32+, idiag_tmem :: Word32+} | TcpVegasInfo {+-- tcpvegas_info + -- TODO hide ?+ tcpInfoVegasEnabled :: Word32+ , tcpInfoRttCount :: Word32+ , tcpInfoRtt :: Word32+ , tcpInfoMinrtt :: Word32+} | CongInfo String deriving (Show, Generic)++-- ideally we should be able to , Serialize+-- encode+-- instance Convertable IDiagExtension where+-- getGet _ = get+-- getPut = put++-- not sure what it is+-- INET_DIAG_MARK, /* only with CAP_NET_ADMIN */++getTcpVegasInfo :: Get IDiagExtension+getTcpVegasInfo = TcpVegasInfo <$> getWord32host <*> getWord32host <*> getWord32host <*> getWord32host++getMemInfo :: Get IDiagExtension+getMemInfo = Meminfo <$> getWord32host <*> getWord32host <*> getWord32host <*> getWord32host+++-- |+getCongInfo :: Get IDiagExtension+getCongInfo = do+ -- bytes = getListOf getWord8+ left <- remaining+ bs <- getByteString left+ return (CongInfo $ unpack bs)++-- Meminfo <$> getWord32host <*> getWord32host <*> getWord32host <*> getWord32host++getDiagTcpInfo :: Get IDiagExtension+getDiagTcpInfo =+ DiagTcpInfo <$> getWord8 <*> getWord8 <*> getWord8 <*> getWord8 <*> getWord8 <*> getWord8 <*> getWord8+ <*> getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host <*>getWord32host++-- Sends a SockDiagRequest+-- expects INetDiag+-- TODO should take an Mptcp connection into account+-- We should use cookies later on+-- MaybeCookie ?+-- TcpConnection -- ^Connection we are requesting+-- #define SS_ALL ((1 << SS_MAX) - 1)+-- #define SS_CONN (SS_ALL & ~((1<<SS_LISTEN)|(1<<SS_CLOSE)|(1<<SS_TIME_WAIT)|(1<<SS_SYN_RECV)))+-- stateFilter = [TcpListen, TcpEstablished, TcpSynSent ]++-- InetDiagInfo+-- TODO we need to request more !+-- TODO if we have a cookie ignore the rest ?!+-- requestedInfo = InetDiagNone++showExtension :: IDiagExtension -> String+showExtension (CongInfo cc) = "Using CC " ++ (show cc)+showExtension (TcpVegasInfo _ _ rtt minRtt) = "RTT=" ++ (show rtt) ++ " minRTT=" ++ show minRtt+-- tcpi_state :: Word8,+showExtension (arg@DiagTcpInfo{}) = "TcpInfo: rtt/rttvar=" ++ show ( tcpi_rtt arg) ++ "/" ++ show ( tcpi_rttvar arg)+ ++ " snd_cwnd/ssthresh=" ++ show (tcpi_snd_cwnd arg) ++ "/" ++ show (tcpi_snd_ssthresh arg)+showExtension rest = show rest+-- "RTT=" ++ (show rtt) ++ " minRTT=" ++ show minRtt++-- | TODO use either ?+genQueryPacket :: (Either Word64 TcpConnection) -> [TcpState] -> [IDiagExt] -> Packet SockDiagRequest+genQueryPacket selector tcpStatesFilter requestedInfo = let+ -- Mesge type / flags /seqNum /pid+ flags = (fNLM_F_REQUEST .|. fNLM_F_MATCH .|. fNLM_F_ROOT)+++ -- might be a trick with seqnum+ hdr = Header msgTypeSockDiag flags magicSeq 0++ diag_req = case selector of+ -- TODO+ Left cookie -> let+ bstr = pack $ replicate 128 (0 :: Word8)+ in+ InetDiagSockId 0 0 bstr bstr 0 cookie++ Right con -> let+ ipSrc = runPut $ putIPAddress (srcIp con)+ ipDst = runPut $ putIPAddress (dstIp con)+ ifIndex = subflowInterface con+ _cookie = 0 :: Word64+ in+ InetDiagSockId (srcPort con) (dstPort con) ipSrc ipDst (fromJust ifIndex) _cookie++ -- 1 => "lo". Check with ip link ?+ -- TODO pick from connection+ -- ifIndex = fromIntegral localhostIntfIdx :: Word32++ custom = SockDiagRequest eAF_INET eIPPROTO_TCP requestedInfo tcpStatesFilter diag_req+ in+ Packet hdr custom Map.empty++-- | to search for a specific connection+queryPacketFromCookie :: Word64 -> Packet SockDiagRequest+queryPacketFromCookie cookie = genQueryPacket (Left cookie) [] []+++loadExtension :: Int -> ByteString -> Maybe IDiagExtension+loadExtension key value = let+ fn = case toEnum key of+ -- MessageType shouldn't matter anyway ?!+ -- DiagCong error too few bytes+ InetDiagCong -> Just getCongInfo+ -- InetDiagNone -> Nothing+ InetDiagInfo -> Just getDiagTcpInfo+ -- InetDiagInfo -> case runGet (getGet 42) value of+ -- Right x -> Just x+ -- _ -> Nothing+ InetDiagVegasinfo -> Just getTcpVegasInfo+ -- InetDiagTos -> Nothing+ -- InetDiagTclass -> Nothing+ -- InetDiagSkmeminfo -> Nothing+ -- InetDiagShutdown -> Nothing+ -- InetDiagDctcpinfo -> Nothing+ -- InetDiagProtocol -> Nothing+ -- InetDiagSkv6only -> Nothing+ -- InetDiagLocals -> Nothing+ -- InetDiagPeers -> Nothing+ -- InetDiagPad -> Nothing+ -- InetDiagMark -> Nothing+ -- InetDiagBbrinfo -> Nothing+ -- InetDiagClassId -> Nothing+ -- InetDiagMd5sig -> Nothing+ -- InetDiagMax -> Nothing+ _ -> Nothing+ -- _ -> case decode value of+ -- Right x -> Just x+ -- -- Left err -> error $ "fourre-tout error " ++ err+ -- Left err -> Nothing++ in case fn of+ Nothing -> Nothing+ Just getFn -> case runGet getFn value of+ Right x -> Just $ x+ Left err -> error $ "Decoding error " ++ err+
+ Net/Tcp.hs view
@@ -0,0 +1,59 @@+{-|+Module : TCP+Description : Implementation of mptcp netlink path manager+Maintainer : matt+Stability : testing+Portability : Linux++-}+{-# LANGUAGE DeriveGeneric #-}+module Net.Tcp (+ TcpConnection (..)+ , Net.Tcp.reverse+) where+++import Net.IP+import Data.Aeson+import Data.Word (Word8, Word16, Word32)+import GHC.Generics++data TcpConnection = TcpConnection {+ -- TODO use libraries to deal with that ? filter from the command line for instance ?+ srcIp :: IP -- ^Source ip+ , dstIp :: IP -- ^Destination ip+ , srcPort :: Word16 -- ^ Source port+ , dstPort :: Word16 -- ^Destination port+ , priority :: Maybe Word8 -- ^subflow priority+ , localId :: Word8 -- ^ Convert to AddressFamily+ , remoteId :: Word8+ , inetFamily :: Word16+ , subflowInterface :: Maybe Word32 -- ^Interface of Maybe ?+ -- add TcpMetrics member++} deriving (Show, Generic)+++reverse :: TcpConnection -> TcpConnection+reverse con = TcpConnection {+ srcIp = dstIp con+ , dstIp = srcIp con+ , srcPort = dstPort con+ , dstPort = srcPort con+ , priority = Nothing+ , localId = remoteId con+ , remoteId = localId con+ , subflowInterface = Nothing+ , inetFamily = inetFamily con+}+++instance FromJSON TcpConnection+instance ToJSON TcpConnection++-- ignore the rest+instance Eq TcpConnection where+ x == y = srcIp x == srcIp y && dstIp x == dstIp y+ && srcPort x == srcPort y && dstPort x == dstPort y+ -- /= = not ==+
+ README.md view
@@ -0,0 +1,68 @@++This is a rewrite in haskell of the python netlink module.+nix-shell -p 'haskellPackages.ghcWithHoogle(p: with p; [netlink optparse-applicative ])'+++The netlink module asks for GENL_ADMIN_PERM => The operation requires the CAP_NET_ADMIN privilege++sudo setcap cap_net_admin+ep hs/dist-newstyle/build/x86_64-linux/ghc-8.6.3/netlink-pm-1.0.0/x/daemon/build/daemon/daemon++# Netlink explanation++To fetch TCP diagnostics:+Creates a socket with family eNETLINK_INET_DIAG (really NETLINK_SOCK_DIAG) with value 4+AF_INET => netlink family 2++++# Compilation++With a custom netlink and kernel+Compile the custom netlink library with+```+$ cabal configure --enable-library-profiling+```+```+kernel $ make headers_install+$ cabal configure --package-db /home/teto/netlink-hs/dist/package.conf.inplace --extra-include-dirs=/home/teto/mptcp2/build/usr/include -v3 --enable-profiling+```+++# Usage++Enter the nix-shell shell-test.nix and start the daemon:++$ cabal run daemon++or+$ buildNRun+To print a stacktrace+cabal run daemon toto -- +RTS -xc++In a shell:+`$ nix run nixpkgs.iperf -c iperf -s`++In another:+`$ nix run nixpkgs.iperf -c iperf -c localhost -b 1KiB -t 4 --cport 5500 -4`++TODO:+ss package sends by default+```+-- #define SS_ALL ((1 << SS_MAX) - 1)+-- #define SS_CONN (SS_ALL & ~((1<<SS_LISTEN)|(1<<SS_CLOSE)|(1<<SS_TIME_WAIT)|(1<<SS_SYN_RECV)))+-- #define TIPC_SS_CONN ((1<<SS_ESTABLISHED)|(1<<SS_LISTEN)|(1<<SS_CLOSE))+```+- [ ] write wordToEnums function, especially to fix getSockDiagRequestHeader+(with bitset package once it's fixed)++# Testsuite++# BUGS++- conversion of IDiagExt is bad everywhere ? req.r.idiag_ext |= (1<<(INET_DIAG_INFO-1));+- we need to request more states++# TODO +- pass local/server IPs as commands to the PM ?+- generate completion scripts via --zsh-completion-script+- to get kernel ifindex: cat /sys/class/net/lo/ifindex
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ headers/tcp_states.h view
@@ -0,0 +1,52 @@+/*+ * INET An implementation of the TCP/IP protocol suite for the LINUX+ * operating system. INET is implemented using the BSD Socket+ * interface as the means of communication with the user level.+ *+ * Definitions for the TCP protocol sk_state field.+ *+ * This program 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+ * 2 of the License, or (at your option) any later version.+ */+#ifndef _LINUX_TCP_STATES_H+#define _LINUX_TCP_STATES_H++enum eTCPStates {+ TCP_ESTABLISHED = 1,+ TCP_SYN_SENT,+ TCP_SYN_RECV,+ TCP_FIN_WAIT1,+ TCP_FIN_WAIT2,+ TCP_TIME_WAIT,+ TCP_CLOSE,+ TCP_CLOSE_WAIT,+ TCP_LAST_ACK,+ TCP_LISTEN,+ TCP_CLOSING, /* Now a valid state */+ TCP_NEW_SYN_RECV,++ TCP_MAX_STATES /* Leave at the end! */+} ;++#define TCP_STATE_MASK 0xF++#define TCP_ACTION_FIN (1 << 7)++enum {+ TCPF_ESTABLISHED = (1 << 1),+ TCPF_SYN_SENT = (1 << 2),+ TCPF_SYN_RECV = (1 << 3),+ TCPF_FIN_WAIT1 = (1 << 4),+ TCPF_FIN_WAIT2 = (1 << 5),+ TCPF_TIME_WAIT = (1 << 6),+ TCPF_CLOSE = (1 << 7),+ TCPF_CLOSE_WAIT = (1 << 8),+ TCPF_LAST_ACK = (1 << 9),+ TCPF_LISTEN = (1 << 10),+ TCPF_CLOSING = (1 << 11),+ TCPF_NEW_SYN_RECV = (1 << 12),+};++#endif /* _LINUX_TCP_STATES_H */
+ hs/daemon.hs view
@@ -0,0 +1,855 @@+{-|+Description : Implementation of mptcp netlink path manager+Maintainer : matt+Stability : testing+Portability : Linux++Monitors new MPTCP connections and runs a specific monitor instance++To interact+GENL_ADMIN_PERM+The operation requires the CAP_NET_ADMIN privilege++Helpful links:++- inspired by https://stackoverflow.com/questions/6009384/exception-handling-in-haskell+- super nice tutorial on optparse applicative: https://github.com/pcapriotti/optparse-applicative#regular-options+- How to use Map https://lotz84.github.io/haskellbyexample/ex/maps+= How to update a single field https://stackoverflow.com/questions/14955627/shorthand-way-for-assigning-a-single-field-in-a-record-while-copying-the-rest-o+- get tcp stats via netlink https://www.vividcortex.com/blog/2014/09/22/using-netlink-to-optimize-socket-statistics/+eNETLINK_INET_DIAG+++Concurrent values+- https://www.oreilly.com/library/view/parallel-and-concurrent/9781449335939/ch07.html+- https://stackoverflow.com/questions/22171895/using-tchan-with-timeout+- https://www.reddit.com/r/haskellquestions/comments/5rh1d4/concurrency_and_shared_state/++Mutable states:+- https://blog.jakuba.net/2014/07/20/Mutable-State-in-Haskell/+- http://mainisusuallyafunction.blogspot.com/2011/10/safe-top-level-mutable-variables-for.html++http://kristrev.github.io/2013/07/26/passive-monitoring-of-sockets-on-linux++iproute2/misc/ss.c to see how `ss` utility interacts with the kernel+-- https://downloads.haskell.org/~ghc/latest/docs/html/libraries/process-1.6.5.0/System-Process.html++Aeson tutorials:+-- https://haskell.fpcomplete.com/library/aeson+- https://lotz84.github.io/haskellbyexample/ex/timers++- https://lotz84.github.io/haskellbyexample/ex/maps+++Useful functions in Map+- member / elemes / keys / assocs / keysSet / toList+-}++-- !/usr/bin/env nix-shell+-- !nix-shell ../shell-haskell.nix -i ghc+module Main where++import Prelude hiding (concat)+import Options.Applicative hiding (value, ErrorMsg)+import qualified Options.Applicative (value)++-- For TcpState, FFI generated+import Generated+import Net.SockDiag+import Net.Mptcp+import Net.Tcp+import Net.IP+import Net.IPv4 hiding (print)+import Net.IPAddress++-- for replicateM+-- import Control.Monad+import Data.Maybe ()+import Data.Foldable ()+import Foreign.C.Types (CInt)+import Foreign.C.Error+-- import qualified System.Linux.Netlink as NL+import System.Linux.Netlink as NL+import System.Linux.Netlink.GeNetlink as GENL+import System.Linux.Netlink.Constants as NLC+-- import System.Linux.Netlink.Helpers+import System.Log.FastLogger+import System.Linux.Netlink.GeNetlink.Control+import qualified System.Linux.Netlink.Simple as NLS+import qualified System.Linux.Netlink.Route as NLR++import System.Process+import System.Exit+import Data.Word (Word16, Word32)+-- import qualified Data.Bits as Bits -- (shiftL, )+-- import Data.Bits ((.|.))+import Data.Serialize.Get (runGet)+import Data.Serialize.Put+-- import Data.Either (fromRight)+import Data.ByteString (ByteString)+import Data.ByteString.Lazy (writeFile)+-- import qualified Data.ByteString.Char8 as BSC+import qualified Data.Map as Map++import Data.Bits (Bits(..))++-- https://hackage.haskell.org/package/bytestring-conversion-0.1/candidate/docs/Data-ByteString-Conversion.html#t:ToByteString+-- contains ToByteString / FromByteString+-- import Data.ByteString.Conversion+import Debug.Trace+-- import Control.Exception++import Control.Concurrent+import Control.Exception (assert)+-- import Control.Concurrent.Chan+-- import Data.IORef+-- import Control.Concurrent.Async+import System.IO.Unsafe+import Data.Aeson++-- for writeUTF8File+-- import Distribution.Simple.Utils+-- import Distribution.Utils.Generic++-- STM = State Thread Monad ST monad+-- import Data.IORef+-- MVar can be empty contrary to IORef !+-- globalMptcpSock :: IORef MptcpSocket++{-# NOINLINE globalMptcpSock #-}+globalMptcpSock :: MVar MptcpSocket+globalMptcpSock = unsafePerformIO newEmptyMVar++{-# NOINLINE globalMetricsSock #-}+globalMetricsSock :: MVar NetlinkSocket+globalMetricsSock = unsafePerformIO newEmptyMVar++iperfClientPort :: Word16+iperfClientPort = 5500++iperfServerPort :: Word16+iperfServerPort = 5201++monitoringRateMs :: Int+monitoringRateMs = 100+++data MyState = MyState {+ socket :: MptcpSocket -- ^Socket+ -- ThreadId/MVar+ , connections :: Map.Map MptcpToken (ThreadId, MVar MptcpConnection)+}+-- deriving Show++++-- , dstIp = fromIPv4 localhost+authorizedCon1 :: TcpConnection+authorizedCon1 = TcpConnection {+ srcIp = fromIPv4 $ Net.IPv4.ipv4 192 168 0 128+ , dstIp = fromIPv4 $ Net.IPv4.ipv4 202 214 86 51+ , srcPort = iperfClientPort+ , dstPort = iperfServerPort+ , priority = Nothing+ , subflowInterface = Nothing+ , localId = 0+ , remoteId = 0+ , inetFamily = eAF_INET+ }++filteredConnections :: [TcpConnection]+filteredConnections = [+ authorizedCon1+ ]+++-- inspired by CtrlPacket+ -- token :: MptcpToken+-- MptcpNewConnection+-- data MptcpPacket = MptcpPacket {+-- mptcpHeader :: Header+-- , mptcpGeHeader :: GenlHeader+-- , mptcpData :: MptcpData++-- data MptcpData = MptcpData {+-- mptcpAttributes :: [MptcpAttr]+-- } deriving (Eq)++-- TODO are they generated+dumpCommand :: MptcpGenlEvent -> String+dumpCommand x = show x ++ " = " ++ show (fromEnum x)+-- dumpCommand MPTCP_CMD_UNSPEC = " MPTCP_CMD_UNSPEC 0"+-- dumpCommand MPTCP_EVENT_SUB_ERROR = show MPTCP_EVENT_SUB_ERROR + show fromEnum MPTCP_EVENT_SUB_ERROR++dumpMptcpCommands :: MptcpGenlEvent -> String+dumpMptcpCommands MPTCP_CMD_EXIST = dumpCommand MPTCP_CMD_EXIST+dumpMptcpCommands x = dumpCommand x ++ "\n" ++ dumpMptcpCommands (succ x)+++-- todo use it as a filter+data Sample = Sample {+ command :: String+ , serverIP :: IPv4+ -- , clientIP :: IPv4+ , quiet :: Bool+ , enthusiasm :: Int+ }+++-- TODO use 3rd party library levels+-- data Verbosity = Normal | Debug++++-- TODO register subcommands instead+-- see https://stackoverflow.com/questions/31318643/optparse-applicative-how-to-handle-no-arguments-situation-in-arrow-syntax+-- ( command "add" (info addOptions ( progDesc "Add a file to the repository" ))+ -- <> command "commit" (info commitOptions ( progDesc "Record changes to the repository" ))+-- can use several constructors depending on the PM ?+-- eitherReader+-- ByteString+-- <> ( metavar "ServerIP"+--readerError+sample :: Parser Sample+sample = Sample+ <$> argument str+ ( metavar "CMD"+ <> help "What to do" )+ <*> argument (eitherReader $ \x -> case (Net.IPv4.decodeString x) of+ Nothing -> Left "could not parse"+ Just ip -> Right ip)+ ( metavar "ServerIP"+ <> help "ServerIP to let through (e.g.: 202.214.86.51 )" )+ <*> switch+ ( long "verbose"+ <> short 'v'+ <> help "Whether to be quiet" )+ <*> option auto+ ( long "enthusiasm"+ <> help "How enthusiastically to greet"+ <> showDefault+ <> Options.Applicative.value 1+ <> metavar "INT" )+++opts :: ParserInfo Sample+opts = info (sample <**> helper)+ ( fullDesc+ <> progDesc "Print a greeting for TARGET"+ <> header "hello - a test for optparse-applicative" )++++-- inspired by makeNL80211Socket Create a 'NL80211Socket' this opens a genetlink+-- socket and gets the family id+-- TODO should record the token too+-- TODO should join the group !!+makeMptcpSocket :: IO MptcpSocket+makeMptcpSocket = do+ -- for legacy reasons this opens a route socket+ sock <- GENL.makeSocket+ res <- getFamilyIdS sock mptcpGenlName+ case res of+ Nothing -> error $ "Could not find family " ++ mptcpGenlName+ Just fid -> return (MptcpSocket sock (trace ("family id"++ show fid ) fid))+++-- Used tuples+-- sock <- makeSocket+makeMetricsSocket :: IO NetlinkSocket+makeMetricsSocket = do+ -- NETLINK_SOCK_DIAG == NETLINK_INET_DIAG+ sock <- makeSocketGeneric eNETLINK_SOCK_DIAG+ return sock++-- used in tests+startMonitorExternalProcess :: MptcpToken -> CreateProcess+startMonitorExternalProcess token =+ let+ params = proc "daemon" [ show token ]+ -- todo pass the token via the environment+ newParams = params {+ -- cmdspec = RawCommand "monitor" [ show token ] + new_session = True+ -- cwd+ -- env+ }+ in+ -- return "toto"+ newParams++-- A utility function - threadDelay takes microseconds, which is slightly annoying.+sleepMs :: Int -> IO()+sleepMs n = threadDelay (n * 1000)++-- Need a specific chan+-- TODO it should start a forkIO that fetches metrics and updates stuff+-- Chan ->+-- readChan is blocking sadly+-- modifyMVar_+++-- here we may want to run mptcpnumerics to get some results+updateSubflowMetrics :: TcpConnection -> IO ()+updateSubflowMetrics subflow = do+ putStrLn "Reading metrics sock Mvar..."+ sockMetrics <- readMVar globalMetricsSock++ putStrLn "Reading mptcp sock Mvar..."+ mptcpSock <- readMVar globalMptcpSock+ putStrLn "Finished reading"+ let queryPkt = genQueryPacket (Right subflow) [TcpListen, TcpEstablished]+ [InetDiagCong, InetDiagInfo, InetDiagMeminfo]+ -- let (MptcpSocket testSock familyId ) = mptcpSock+ sendPacket sockMetrics queryPkt+ putStrLn "Sent the TCP SS request"++ -- exported from my own version !!+ recvMulti sockMetrics >>= inspectIdiagAnswers+ -- for now let's discard the answer+ -- recvOne sockMetrics >>= inspectIdiagAnswers++ -- let capCwndPkt = genCapCwnd familyId+ -- sendPacket testSock capCwndPkt >> putStrLn "Sent the Cap command"++-- TODO +-- clude child configs in grub menu #45345+-- send MPTCP_CMD_SND_CLAMP_WINDOW+-- TODO we need the token to generate the command ?+--token, family, loc_id, rem_id, [saddr4 | saddr6,+-- daddr4 | daddr6, dport [, sport, backup, if_idx]]++genCapCwnd :: MptcpToken+ -> Word16 -- ^family id+ -> MptcpPacket+genCapCwnd token familyId =+ assert (hasFamily attrs) pkt+ where+ pkt = genMptcpRequest familyId MPTCP_CMD_SND_CLAMP_WINDOW True attrs+ -- attrs = Map.empty+ attrs = [+ MptcpAttrToken token+ , SubflowFamily eAF_INET+ , LocalLocatorId 0+ -- TODO check emote locator ?+ , RemoteLocatorId 0+ , SubflowInterface localhostIntfIdx+ -- , SubflowInterface localhostIntfIdx+ ]+ -- putStrLn "while waiting for a real implementation"++-- Use a Mvar here to+startMonitorConnection :: MptcpSocket -> MVar MptcpConnection -> IO ()+startMonitorConnection mptcpSock mConn = do+ -- ++ show token+ let (MptcpSocket sock familyId) = mptcpSock+ putStr "Start monitoring connection..."+ -- as long as conn is not empty we keep going ?+ -- for this connection+ -- query metrics for the whole MPTCP connection+ con <- readMVar mConn+ putStrLn $ show con ++ "..."+ let token = connectionToken con+++ let resetAttrs = [ (MptcpAttrToken token ), (LocalLocatorId 0)]+ let masterSf = head $ subflows con+ let newSubflowAttrs = [+ MptcpAttrToken token+ ] ++ (subflowAttrs $ masterSf { srcPort = 0 })+ let capSubflowAttrs = [+ MptcpAttrToken token+ , SubflowMaxCwnd 3+ , SubflowSourcePort $ srcPort masterSf+ ] ++ (subflowAttrs masterSf)+ let resetPkt = resetConnectionPkt mptcpSock resetAttrs+ let newSfPkt = newSubflowPkt mptcpSock newSubflowAttrs+ -- let capCwndPkt = capCwndPkt mptcpSock capSubflowAttrs++ -- updateCwndCap+ -- queryOne+ -- putStrLn $ "Sending RESET for token " ++ show token+ -- query sock resetPkt >>= inspectAnswers++ -- putStrLn $ "Master sf " ++ show masterSf+ -- putStrLn $ "Trying to cap subflow cwd... with token " ++ show token+ -- putStrLn $ "Sending " ++ show capCwndPkt++ -- putStrLn $ "Master sf " ++ show masterSf+ -- putStrLn $ "Trying to create new subflow... with token " ++ show token+ -- putStrLn $ "Sending " ++ show newSfPkt+ -- query sock newSfPkt >>= inspectAnswers++ putStrLn "Running mptcpnumerics"+ cwnds <- getCapsForConnection con++ putStrLn $ "Requesting to set cwnds..." ++ show cwnds+ -- TODO capCwndAttrs capCwndPkt + -- KISS for now (capCwndPkt mptcpSock )+ -- zip caps (subflows con) + let attrsList = map (\(cwnd, sf) -> capCwndAttrs token sf cwnd ) (zip cwnds (subflows con))+ -- >> map (capCwndPkt mptcpSock ) >>= putStrLn "toto"++ -- query sock capCwndPkt >>= inspectAnswers+ -- de type [MptcpPacket]+ let cwndPackets = map (capCwndPkt mptcpSock) attrsList+ mapM_ (query sock) cwndPackets >> putStrLn "test"+ -- >>= inspectAnswers++ -- then we should send a request for each cwnd+ mapM_ updateSubflowMetrics (subflows con)++ sleepMs monitoringRateMs+ putStrLn "Finished monitoring token "+ -- call ourself again+ startMonitorConnection mptcpSock mConn+++-- | This should return a list of cwnd to respect a certain scenario+-- invoke+-- 1. save the connection to a JSON file and pass it to mptcpnumerics+-- 2.+-- 3.+-- Maybe ?+getCapsForConnection :: MptcpConnection -> IO [Word32]+getCapsForConnection con = do+ -- returns a bytestring+ let bs = Data.Aeson.encode con+ let subflowCount = length $ subflows con+ let filename = "mptcp_" ++ (show $ subflowCount) ++ "_" ++ (show $ connectionToken con) ++ ".json"+ -- encode token in filename+ -- fromMaybe $+ Data.ByteString.Lazy.writeFile filename bs++ -- eitherDecode+ -- TODO run readProcessWithExitCode instead+ -- FilePath -> [String] -> String -> IO (ExitCode, String, String)++ -- TODO to keep it simple it should return a list of CWNDs to apply+ -- readProcessWithExitCode binary / args / stdin+ (exitCode, stdout, stderr) <- readProcessWithExitCode "./fake_solver" [filename, show subflowCount] ""+ case exitCode of+ -- for now simple, we might read json afterwards+ ExitSuccess -> return (read stdout :: [Word32])+ ExitFailure val -> error $ "stdout:" ++ stdout ++ " stderr: " ++ stderr++-- type Attributes = Map Int ByteString+-- the library contains showAttrs / showNLAttrs+showAttributes :: Attributes -> String+showAttributes attrs =+ let+ mapped = Map.foldrWithKey (\k v -> (dumpAttribute k v ++) ) "\n " attrs+ in+ mapped++putW32 :: Word32 -> ByteString+putW32 x = runPut (putWord32host x)++-- removeSubflow :: MptcpSocket -> MptcpToken -> LocId -> IO [GenlPacket NoData]+-- removeSubflow (MptcpSocket socket fid) token locId = let++-- I want to override the GenlHeader version+newtype GenlHeaderMptcp = GenlHeaderMptcp GenlHeader+instance Show GenlHeaderMptcp where+ show (GenlHeaderMptcp (GenlHeader cmd ver)) =+ "Header: Cmd = " ++ show cmd ++ ", Version: " ++ show ver ++ "\n"++inspectAnswers :: [GenlPacket NoData] -> IO ()+inspectAnswers packets = do+ mapM_ inspectAnswer packets+ putStrLn "Finished inspecting answers"++-- showPacketCustom :: GenlPacket NoData -> String+-- showPacketCustom pkt = let+-- hdr = (genlDataHeader pkt )+-- in showPacket pkt++showHeaderCustom :: GenlHeader -> String+showHeaderCustom hdr = show hdr++inspectAnswer :: GenlPacket NoData -> IO ()+-- inspectAnswer packet = putStrLn $ "Inspecting answer:\n" ++ showPacket packet+-- (GenlData NoData)+-- inspectAnswer (Packet hdr (GenlData ghdr NoData) attributes) = putStrLn $ "Inspecting answer:\n"+inspectAnswer (Packet _ (GenlData hdr NoData) attributes) = let+ cmd = genlCmd hdr+ in+ putStrLn $ "Inspecting answer custom:\n" ++ showHeaderCustom hdr+ ++ "Supposing it's a mptcp command: " ++ dumpCommand ( toEnum $ fromIntegral cmd)++inspectAnswer pkt = putStrLn $ "Inspecting answer:\n" ++ showPacket pkt++++queryAddrs :: NLR.RoutePacket+queryAddrs = NL.Packet+ (NL.Header NLC.eRTM_GETADDR (NLC.fNLM_F_ROOT .|. NLC.fNLM_F_MATCH .|. NLC.fNLM_F_REQUEST) 0 0)+ (NLR.NAddrMsg 0 0 0 0 0)+ mempty+++handleMessage :: NLR.Message -> IO()+handleMessage (NLR.NLinkMsg _ _ _ ) = putStrLn $ "Ignoring NLinkMsg"+handleMessage (NLR.NNeighMsg _ _ _ _ _ ) = putStrLn $ "Ignoring NNeighMsg"+handleMessage (NLR.NAddrMsg _ _ _ _ _ ) = putStrLn $ "Ignoring NNeighMsg"++-- TODO handle remove/new event+handleAddr :: Either String NLR.RoutePacket -> IO ()+handleAddr (Left errStr) = putStrLn $ "Error decoding packet: " ++ errStr+handleAddr (Right (Packet hdr pkt _)) = handleMessage pkt+handleAddr (Right (DoneMsg hdr)) = putStrLn $ "Error decoding packet: " ++ show hdr+handleAddr (Right (ErrorMsg hdr errorInt errorBstr )) = putStrLn $ "Error decoding packet: " ++ show hdr++--+onNewConnection :: MptcpSocket -> Attributes -> IO ()+onNewConnection sock attributes = do+ -- TODO use getAttribute instead + let token = readToken $ Map.lookup (fromEnum MPTCP_ATTR_TOKEN) attributes+ let locId = readLocId $ Map.lookup (fromEnum MPTCP_ATTR_LOC_ID) attributes+ let answer = "e"+ -- answer <- Prelude.getLine+ -- putStrLn "What do you want to do ? (c.reate subflow, d.elete connection, r.eset connection)"+ -- announceSubflow sock token >>= inspectAnswers >> putStrLn "Finished announcing"+ case answer of+ "c" -> do+ putStrLn "Creating new subflow !!"+ -- let pkt = createNewSubflow sock token attributes+ return ()+ "d" -> putStrLn "Not implemented"+ -- removeSubflow sock token locId >>= inspectAnswers >> putStrLn "Finished announcing"+ -- "e" -> putStrLn "check for existence" >>+ -- checkIfSocketExists sock token >>= inspectAnswers+ "r" -> putStrLn "Reset the connection" >>+ -- TODO expects token+ -- TODO discard result+ -- resetTheConnection sock token >>= inspectAnswers >>+ putStrLn "Finished resetting"+ _ -> onNewConnection sock attributes+ return ()+++-- |Class to implement different path managers+-- class PathManager a where+-- onNewSubflow :: TcpConnection -> [MptcpPacket]+++-- unknownConnectionEvent :: M+-- unknownConnectionMonitor :: MptcpToken -> MptcpPacket+-- pass [MptcpAttribute] instead ?+-- +dispatchPacketForKnownConnection :: MptcpConnection+ -> MptcpGenlEvent+ -> Attributes+ -> MptcpConnection+ -- -> IO MyState+dispatchPacketForKnownConnection con event attributes = let+ token = connectionToken con+ in+ case event of+ -- TODO wait for established instead ?+ -- MPTCP_EVENT_CREATED -> do++ MPTCP_EVENT_ESTABLISHED -> con+ -- do+ -- putStrLn "Connection established !"+ -- TODO llok+ -- return oldState++ MPTCP_EVENT_ANNOUNCED -> con+ -- putStrLn "New address announced"+ -- case maybeConn of+ -- Nothing -> putStrLn "No connection with this token" >> return oldState+ -- Just mConn -> _+ -- case mmakeAttributeFromMaybe MPTCP_ATTR_REM_ID attrs of + -- Nothing -> return oldState+ -- Just localId ->+ -- putStrLn "Found a match"+ -- -- swapMVar / withMVar / modifyMVar+ -- mptcpConn <- takeMVar mConn+ -- -- TODO we should trigger an update in the CWND+ -- let newCon = mptcpConnAddLocalId mptcpConn + -- let newState = oldState+ -- return oldState++ MPTCP_EVENT_CLOSED -> do+ -- putStrLn $ "Connection closed, deleting token " ++ show token+ -- let newState = oldState { connections = Map.delete token (connections oldState) }+ -- TODO we should kill the thread with killThread or empty the mVar !!+ -- let newState = oldState+ -- putStrLn $ "New state"+ -- return newState+ con++ MPTCP_EVENT_SUB_ESTABLISHED -> let+ subflow = subflowFromAttributes attributes+ newCon = mptcpConnAddSubflow con subflow+ in+ newCon+ -- let newState = oldState+ -- putMVar con newCon+ -- let newState = oldState { connections = Map.insert token newCon (connections oldState) }+ -- TODO we should insert the+ -- newConn <-+ -- return newState++ -- TODO remove+ MPTCP_EVENT_SUB_CLOSED -> con+ -- putStrLn "Subflow closed"+ -- putStrLn "TODO remove subflow"+ -- >> mptcpConnRemoveSubflow+ -- return oldState++ MPTCP_CMD_EXIST -> con+ _ -> error $ "should not happen " ++ show event+ -- >> return oldState++-- TODO pass a PathManager+-- |^+--+dispatchPacket :: MyState -> MptcpPacket -> IO MyState+dispatchPacket oldState (Packet hdr (GenlData genlHeader NoData) attributes) = let+ cmd = toEnum $ fromIntegral $ genlCmd genlHeader+ (MyState mptcpSock conns) = oldState++ -- i suppose token is always available right ?+ token = readToken $ Map.lookup (fromEnum MPTCP_ATTR_TOKEN) attributes+ maybeMatch = Map.lookup token (connections oldState)+ in+ case maybeMatch of+ -- Unknown token+ Nothing -> case cmd of+ MPTCP_EVENT_CREATED -> do+ putStrLn "Ignoring Creating EVENT"+ return oldState++ MPTCP_EVENT_ESTABLISHED -> let subflow = subflowFromAttributes attributes+ in+ if subflow `notElem` filteredConnections+ then do+ putStrLn $ "filtered out connection" ++ show subflow + putStrLn $ "it was compared with " ++ show authorizedCon1 + return oldState+ else (do+ let newMptcpConn = MptcpConnection token [ subflow ] [] []+ newConn <- newMVar newMptcpConn+ putStrLn $ "Connection established !!\n" ++ showAttributes attributes+ -- onNewConnection mptcpSock attributes+ handle <- forkOS (startMonitorConnection mptcpSock newConn)+ -- r <- createProces $ startMonitor token+ -- putStrLn $ "Connection created !!\n" ++ show subflow+ let newState = oldState { connections = Map.insert token (handle, newConn) (connections oldState) }+ return newState)++ _ -> return oldState++ Just (threadId, mvarConn) -> case cmd of++ MPTCP_EVENT_CREATED -> error "We should not receive MPTCP_EVENT_CREATED from here !!!"+ MPTCP_EVENT_SUB_CLOSED -> do+ putStrLn $ "SUBFLOW WAS CLOSED"+ return oldState++ MPTCP_EVENT_CLOSED -> do+ putStrLn $ "Killing thread " ++ show threadId+ killThread threadId+ -- TODO remove + return $ oldState { connections = Map.delete token (connections oldState) }+ -- let newState = oldState++ -- TODO update connection+ -- TODO filter first+ _ -> do+ mptcpConn <- takeMVar mvarConn+ let newConn = dispatchPacketForKnownConnection mptcpConn cmd attributes+ putMVar mvarConn newConn+ -- TODO update state+ let newState = oldState { + connections = Map.insert token (threadId, mvarConn) (connections oldState) + }+ return newState+++dispatchPacket s (DoneMsg err) =+ putStrLn "Done msg" >> return s+++-- EOK shouldn't be an ErrorMsg when it receives EOK ?+dispatchPacket s (ErrorMsg hdr errCode errPacket) = do+ putStrLn $ "Error msg of type " ++ showErrCode errCode ++ " Packet content:\n" ++ show errPacket+ return s++-- ++ show errPacket+showError :: Show a => Packet a -> IO ()+showError (ErrorMsg hdr errCode errPacket) = do+ putStrLn $ "Error msg of type " ++ showErrCode errCode ++ " Packet content:\n" +showError _ = error "Not the good overload"++-- netlink must contain sthg for it+-- /usr/include/asm/errno.h+showErrCode :: CInt -> String+showErrCode err+ | Errno err == ePERM = "EPERM"+ | Errno err == eOK = "EOK"+ | otherwise = show err++-- showErrCode err = case err of+-- -- show err+-- ePERM -> "EPERM"+-- eNOTCONN -> "NOT connected"++inspectResult :: MyState -> Either String MptcpPacket -> IO()+inspectResult myState result = case result of+ Left ex -> putStrLn $ "An error in parsing happened" ++ show ex+ Right myPack -> dispatchPacket myState myPack >> putStrLn "Valid packet"++doDumpLoop :: MyState -> IO MyState+doDumpLoop myState = do+ let (MptcpSocket simpleSock fid) = socket myState++ results <- recvOne' simpleSock :: IO [Either String MptcpPacket]++ -- TODO retrieve packets+ mapM_ (inspectResult myState) results++ newState <- doDumpLoop myState+ return newState++-- regarder dans query/joinMulticastGroup/recvOne+listenToEvents :: MptcpSocket -> CtrlAttrMcastGroup -> IO ()+listenToEvents (MptcpSocket sock fid) my_group = do+ -- joinMulticastGroup returns IO ()+ -- TODO should check it works correctly !+ joinMulticastGroup sock (grpId my_group)+ putStrLn $ "Joined grp " ++ grpName my_group+ let globalState = MyState mptcpSocket Map.empty+ _ <- doDumpLoop globalState+ putStrLn "TOTO"+ where+ mptcpSocket = MptcpSocket sock fid+ -- globalState = MyState mptcpSocket Map.empty+++-- testing+listenToMetricEvents :: NetlinkSocket -> CtrlAttrMcastGroup -> IO ()+listenToMetricEvents sock myGroup = do+ putStrLn "listening to metric events"+ joinMulticastGroup sock (grpId myGroup)+ putStrLn $ "Joined grp " ++ grpName myGroup+ -- _ <- doDumpLoop globalState+ -- putStrLn "TOTO"+ -- where+ -- -- mptcpSocket = MptcpSocket sock fid+ -- globalState = MyState mptcpSocket Map.empty+++createLogger :: IO LoggerSet+createLogger = newStdoutLoggerSet defaultBufSize+++-- for big endian+-- https://mail.haskell.org/pipermail/beginners/2010-October/005571.html+-- foldl' :: (b -> a -> b) -> b -> Maybe a -> b+-- fromOctetsBE :: [Word8] -> Word32+-- fromOctetsBE = foldl' accum 0+-- where+-- accum a o = (a `Bits.shiftL` 8) .|. fromIntegral o+-- -- maybe I could use putIArrayOf instead++-- fromOctetsLE :: [Word8] -> Word32+-- fromOctetsLE = fromOctetsBE . reverse++++dumpExtensionAttribute :: Int -> ByteString -> String+dumpExtensionAttribute attrId value = let+ eExtId = (toEnum attrId :: IDiagExt)+ ext_m = loadExtension attrId value+ in+ case ext_m of+ Nothing -> "Could not load " ++ show eExtId ++ " \n"+ Just ext -> traceId (show eExtId) ++ " " ++ showExtension ext ++ " \n"+ -- show $ (toEnum attrId :: IDiagExt)++showExtensionAttributes :: Attributes -> String+showExtensionAttributes attrs =+ let+ -- $ loadExtension+ mapped = Map.foldrWithKey (\k v -> (dumpExtensionAttribute k v ++ )) "Dumping extensions:\n " attrs+ in+ mapped+++--+inspectIDiagAnswer :: Packet InetDiagMsg -> IO ()+inspectIDiagAnswer (Packet hdr cus attrs) =+ putStrLn ("Idiag custom " ++ show cus) >>+ putStrLn ("Idiag header " ++ show hdr) >>+ putStrLn (showExtensionAttributes attrs)+inspectIDiagAnswer p = putStrLn $ "test" ++ showPacket p++-- inspectIDiagAnswer (DoneMsg err) = putStrLn "DONE MSG"+-- (GenlData NoData)+-- inspectIdiagAnswer (Packet hdr (GenlData ghdr NoData) attributes) = putStrLn $ "Inspecting answer:\n"+-- inspectIdiagAnswer (Packet _ (GenlData hdr NoData) attributes) = let+-- cmd = genlCmd hdr+-- in+-- putStrLn $ "Inspecting answer custom:\n" ++ showHeaderCustom hdr+-- ++ "Supposing it's a mptcp command: " ++ dumpCommand ( toEnum $ fromIntegral cmd)+++-- la en fait c des reponses que j'obtiens ?+inspectIdiagAnswers :: [Packet InetDiagMsg] -> IO ()+inspectIdiagAnswers packets = do+ putStrLn "Start inspecting IDIAG answers"+ mapM_ inspectIDiagAnswer packets+ putStrLn "Finished inspecting answers"++-- s'inspirer de+-- https://github.com/vdorr/linux-live-netinfo/blob/24ead3dd84d6847483aed206ec4b0e001bfade02/System/Linux/NetInfo.hs+main :: IO ()+main = do+ options <- execParser opts++ -- crashes when threaded+ -- logger <- createLogger+ -- pushLogStr logger (toLogStr "ok")++ -- globalState <- newIORef mempty+ -- globalState <- newEmptyMVar+ -- putStrLn "dumping important values:"+ -- putStrLn $ "RESET" ++ show MPTCP_CMD_REMOVE+ -- putStrLn $ dumpMptcpCommands MPTCP_CMD_UNSPEC+ putStrLn "Creating MPTCP netlink socket..."++ -- add the socket too to an MVar ?+ (MptcpSocket sock fid) <- makeMptcpSocket+ -- putMVar instead !+ -- globalState <- newMVar $ MyState (MptcpSocket sock fid) Map.empty+ putMVar globalMptcpSock (MptcpSocket sock fid)++ putStrLn "Creating metrics netlink socket..."+ sockMetrics <- makeMetricsSocket+ -- putMVar+ putMVar globalMetricsSock sockMetrics+++ -- + routingSock <- NLS.makeNLHandle (const $ pure ()) =<< NL.makeSocket+ let cb = NLS.NLCallback (pure ()) (handleAddr . runGet getGenPacket)+ NLS.nlPostMessage routingSock queryAddrs cb+ NLS.nlWaitCurrent routingSock++ putStr "socket created. MPTCP Family id " >> Prelude.print fid+ -- putStr "socket created. tcp_metrics Family id " >> print fidMetrics+ -- That's what I should use in fact !! (Word16, [CtrlAttrMcastGroup])+ -- (mid, mcastGroup ) <- getFamilyWithMulticasts sock mptcpGenlEvGrpName+ -- Each netlink family has a set of 32 multicast groups+ -- mcastMetricGroups <- getMulticastGroups sockMetrics fidMetrics+ mcastMptcpGroups <- getMulticastGroups sock fid+ mapM_ Prelude.print mcastMptcpGroups++ -- mapM_ (listenToMetricEvents sockMetrics) mcastMetricGroups+ mapM_ (listenToEvents (MptcpSocket sock fid)) mcastMptcpGroups+ -- putStrLn $ " Groups: " ++ unwords ( map grpName mcastMptcpGroups )+ putStrLn "finished"+
+ hs/monitor.hs view
@@ -0,0 +1,68 @@+import Options.Applicative hiding (value, ErrorMsg)+import qualified Options.Applicative (value)+import qualified System.Environment as Env+import System.Log.FastLogger ()+import Data.Word (Word8, Word16, Word32)+import Net.Mptcp+import System.Linux.Netlink hiding (makeSocket)+++-- instance Show TcpConnection where+-- show (TcpConnection srcIp dstIP srcPort dstPort) = "Src IP: " ++ srcIp+data MetricsSocket = MetricsSocket NetlinkSocket Word16++++data Sample = Sample+ { command :: String+ , quiet :: Bool+ , enthusiasm :: Int }+++-- TODO register subcommands instead+sample :: Parser Sample+sample = Sample+ <$> argument str+ ( metavar "CMD"+ <> help "What to do" )+ <*> switch+ ( long "verbose"+ <> short 'v'+ <> help "Whether to be quiet" )+ <*> option auto+ ( long "enthusiasm"+ <> help "How enthusiastically to greet"+ <> showDefault+ <> Options.Applicative.value 1+ <> metavar "INT" )+++opts :: ParserInfo Sample+opts = info (sample <**> helper)+ ( fullDesc+ <> progDesc "Print a greeting for TARGET"+ <> header "hello - a test for optparse-applicative" )+++main :: IO ()+main = do+ -- let token = + case Env.getEnv "token" of+ Nothing -> error "Needs the token of the connection to monitor"+ Just token -> putStrLn "Monitoring token " ++ show token+ putStrLn $ "Starting monitoring connection with token " ++ show token+ (MptcpSocket sock fid) <- makeMptcpSocket+ putStr "socket created. MPTCP Family id " >> print fid+ let mptcpConnection = MptcpConnection token []++ -- (sockMetrics, fidMetrics) <- makeMetricsSocket+ putStrLn "Creating metrics netlink socket..."+ sockMetrics <- makeMetricsSocket++ mapM_ (listenToEvents (MptcpSocket sock fid)) mcastMptcpGroups++ -- sendPacket+ sendPacket sockMetrics genQueryPacket >> putStrLn "Sent the TCP SS request"++ -- exported from my own version !!+ recvMulti sockMetrics >>= inspectIdiagAnswers
+ hs/test.hs view
@@ -0,0 +1,65 @@+import Prelude hiding (length, concat)+-- import Options.Applicative hiding (value)+-- import qualified Options.Applicative (value)++import Generated+import Data.Bits ()+import Data.Bits (( .|.))+-- import System.Linux.Netlink hiding (makeSocket)+-- import System.Linux.Netlink (query, bufferSize)+-- import System.Linux.Netlink.GeNetlink+-- import System.Linux.Netlink.Constants++-- import System.Linux.Netlink.GeNetlink.Control as C+-- import Data.Word (Word8, Word16, Word32)+-- import Data.List (intercalate)+-- import Data.Serialize.Put++import IDiag++-- import Data.ByteString as BS hiding (putStrLn, putStr, map, intercalate)+-- import qualified Data.ByteString.Lazy as BSL++-- import Debug.Trace+-- import Control.Exception++-- data MptcpSocket = MptcpSocket NetlinkSocket Word16++-- mptcpGenlEvGrpName :: String+-- mptcpGenlEvGrpName = "mptcp_events"+-- mptcpGenlCmdGrpName :: String+-- mptcpGenlCmdGrpName = "mptcp_commands"+-- mptcpGenlName :: String+-- mptcpGenlName="mptcp"++-- makeMptcpSocket :: IO MptcpSocket+-- makeMptcpSocket = do+-- sock <- makeSocket+-- putStrLn "socket created"+-- res <- getFamilyIdS sock mptcpGenlName+-- case res of+-- Nothing -> error $ "Could not find family " ++ mptcpGenlName+-- Just fid -> return (MptcpSocket sock (trace ("family id"++ show fid ) fid))+++-- instance Bits TcpState where+-- shiftL x = shiftL (fromEnum x - 1)+++-- in fact it's 1 << fromEnum TcpListen)+-- (fromEnum TcpListen) .|. (fromEnum TcpEstablished)++-- #define SS_ALL ((1 << SS_MAX) - 1)+-- #define SS_CONN (SS_ALL & ~((1<<SS_LISTEN)|(1<<SS_CLOSE)|(1<<SS_TIME_WAIT)|(1<<SS_SYN_RECV)))+-- #define TIPC_SS_CONN ((1<<SS_ESTABLISHED)|(1<<SS_LISTEN)|(1<<SS_CLOSE))++main :: IO ()+main = let + -- TODO test with shiftL+ toto = (fromEnum TcpListen) .|. (fromEnum TcpEstablished)+ in do+ putStrLn $ "InetDiag =" ++ show (fromEnum InetDiagMeminfo)+ putStrLn $ "TcpListen =" ++ show (enumsToWord [TcpListen])+ putStrLn $ "TcpEstablished =" ++ show (enumsToWord [TcpEstablished])+ putStrLn $ "combo !!" ++ show (enumsToWord [TcpEstablished, TcpListen])+ putStrLn "finished"
+ mptcp-pm.cabal view
@@ -0,0 +1,114 @@+cabal-version: 2.2+name: mptcp-pm+version: 0.0.1+license: GPL-3.0-only+license-file: LICENSE+build-type: Simple+Maintainer: teto+Category: Network+Synopsis: A work in progress Multipath TCP path manager+Homepage: https://github.com/teto/netlink_pm+Description:+ Multipath TCP (www.multipath-tcp.org) starting from version 0.95 provides a + netlink path manager module. This package implements the userspace part to allow+ userspace daemons to control MPTCP behavior.+Extra-source-files:+ headers/*.h README.md CHANGELOG++Source-repository head+ type: git+ location: https://github.com/teto/netlink_pm+++Flag Dev {+ Description: Develop with a local netlink library+ Default: True+}+++-- TODO write a rule specific to generated files+-- , ip requires hspec_2_7+-- iproute/network-info bad+-- bitset, fails+-- aeson to (de)serialize to json+-- brittany for formatting (does not work)+-- use containers for Data.Set ?+-- bytestring-conversion,+common shared-properties+ build-depends: base >= 4.12 && < 4.20, optparse-applicative,+ containers, bytestring, fast-logger, process, cereal, ip, aeson,+ netlink >= 1.1.1.0, bytestring-conversion, c2hsc+ default-language: Haskell2010+ -- -fno-warn-unused-imports+ ghc-options: -Wall -fno-warn-unused-binds -fno-warn-unused-matches++ if flag(Dev)+ build-depends: netlink>= 1.1.1.1+ -- for the generated.hsc , c2hs seems good to generate headers+ Build-tools: hsc2hs, c2hs+ -- apparently this just helps getting a better error messages+ Includes: tcp_states.h, linux/sock_diag.h, linux/inet_diag.h+ Other-modules: Net.SockDiag, Net.Tcp, Net.Mptcp, Net.IPAddress, Generated+ -- TODO try to pass it from CLI instead , Net.TcpInfo+ include-dirs: headers+ -- , Net.TcpInfo+ autogen-modules: Generated++++-- monitor new mptcp connections+-- and delegate the behavior to a monitor+executable daemon+ import: shared-properties+ -- build-depends: MyCustomLibrary+ -- ghc-options: -i/home/teto/netlink-hs+ ghc-options: -Wall -fno-warn-unused-binds -fno-warn-unused-matches -threaded+ main-is: daemon.hs+ -- extra-packages: netlink+ -- extra-lib-dirs: /home/teto/netlink-hs+ hs-source-dirs: ., hs++-- will monitor a specific mptcp connection+executable monitor+ import: shared-properties+ main-is: hs/monitor.hs++-- for short tests+executable short+ import: shared-properties+ main-is: hs/test.hs++-- MyCustomLibrary+library+ Build-tools: hsc2hs, c2hs+ ghc-options: -Wall -fno-warn-unused-binds -fno-warn-unused-matches+ default-language: Haskell2010+ -- apparently this just helps getting a better error messages+ Includes: tcp_states.h, linux/sock_diag.h, linux/inet_diag.h+ include-dirs: . , headers+ -- autogen-modules: Generated+++Test-Suite test+ -- 2 types supported, exitcode is based on ... exit codes ....+ type: exitcode-stdio-1.0+ main-is: test/Main.hs+ -- test-module: Detailed+ hs-source-dirs: .+ default-language: Haskell2010+ -- import: shared-properties+ Build-tools: hsc2hs, c2hs+ Includes: tcp_states.h, linux/sock_diag.h, linux/inet_diag.h+ Other-modules: Generated, Net.SockDiag, Net.Mptcp, Net.IPAddress+ autogen-modules: Generated+ include-dirs: headers+ build-depends: base >=4.12 && <4.20+ , HUnit+ , netlink+ , cereal+ , ip+ , bytestring+ , containers+ , aeson+ -- , test-framework+ -- , test-framework-hunit
+ test/Main.hs view
@@ -0,0 +1,86 @@+{-| +https://stackoverflow.com/questions/32913552/why-does-my-hunit-test-suite-pass-when-my-tests-fail+-}+module Main where++import System.Exit+import Test.HUnit+import Generated+import IDiag+import Net.Mptcp+import Net.IP+import Net.IPv4 (localhost)++-- main = do+-- putStrLn "This test always fails!"+-- exitFailure++testEmpty = TestCase $ assertEqual+ "Check"+ 1+ ( enumsToWord [TcpEstablished] )++testCombo = TestCase $ assertEqual+ "Check"+ 513+ ( enumsToWord [TcpEstablished, TcpListen] )++testComboReverse = TestCase $ assertEqual+ "Check"+ 513+ ( enumsToWord [TcpEstablished, TcpListen] )+++iperfConnection = TcpConnection {+ srcIp = fromIPv4 localhost+ , dstIp = fromIPv4 localhost+ , srcPort = 5000+ , dstPort = 1000+ -- placeholder values+ , priority = Nothing+ , subflowInterface = Nothing+ , localId = 0+ , remoteId = 0+ , inetFamily = 2+ }++modifiedConnection = iperfConnection {+ subflowInterface = Just 0+}++filteredConnections :: [TcpConnection]+filteredConnections = [+ iperfConnection+ ]+++connectionFilter = TestCase $ assertBool+ "Check connection is in the list"+ (iperfConnection `elem` filteredConnections)++-- connectionFilter = TestCase $ assertEqual+-- "Check connection is in the list"+-- True+-- ( iperfConnection `elem` filteredConnections)++-- main :: IO Count+main = do++ results <- runTestTT $ TestList [+ -- testEmpty+ -- , testCombo+ -- , testComboReverse,+ TestLabel "subflow is correctly filtered" connectionFilter+ , TestCase $ assertBool "connection should be equal" (iperfConnection == iperfConnection)+ , TestCase $ assertBool "connection should be equal despite different interfaces"+ (iperfConnection == modifiedConnection)+ , TestCase $ assertBool "connection should be considered as in list"+ (modifiedConnection `elem` filteredConnections)+ , TestCase $ assertBool "connection should not be considered as in list"+ (modifiedConnection `notElem` filteredConnections)+ ]+ if (errors results + failures results == 0)+ then+ exitWith ExitSuccess+ else+ exitWith (ExitFailure 1)