From 63988b33ca82f83fc13a7fb1a556c95bb8cf9813 Mon Sep 17 00:00:00 2001
From: James Crayne <jim.crayne@gmail.com>
Date: Tue, 21 Nov 2017 00:24:49 +0000
Subject: launch ping machine on netcrypto conn

---
 src/Network/Tox/Crypto/Handlers.hs | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

(limited to 'src/Network/Tox/Crypto')

diff --git a/src/Network/Tox/Crypto/Handlers.hs b/src/Network/Tox/Crypto/Handlers.hs
index 10a24e50..cbd820de 100644
--- a/src/Network/Tox/Crypto/Handlers.hs
+++ b/src/Network/Tox/Crypto/Handlers.hs
@@ -32,9 +32,11 @@ import System.FilePath
 import System.IO.Temp
 import System.Environment
 import System.Directory
+import System.Random -- for ping fuzz
 import Control.Concurrent
 import GHC.Conc (labelThread)
 import System.IO.Unsafe(unsafeDupablePerformIO {- unsafeIOToSTM -})
+import PingMachine
 
 -- util, todo: move to another module
 maybeToEither :: Maybe b -> Either String b
@@ -101,6 +103,7 @@ data NetCryptoSession = NCrypto { ncState          :: TVar NetCryptoSessionStatu
                                 , ncPacketQueue :: PacketQueue CryptoData
                                 , ncBufferStart :: TVar Word32
                                 , ncDequeueThread :: Maybe ThreadId
+                                , ncPingMachine :: Maybe PingMachine
                                 , ncOutgoingQueue :: PQ.PacketOutQueue (State,Nonce24,TVar MsgOutMap) CryptoMessage (CryptoPacket Encrypted) CryptoData
                                 }
 
@@ -350,8 +353,10 @@ freshCryptoSession  sessions
                     , ncPacketQueue        = pktq
                     , ncBufferStart        = bufstart
                     , ncDequeueThread      = Nothing -- error "you want the NetCrypto-Dequeue thread id, but is it started?"
+                    , ncPingMachine        = Nothing -- error "you want the NetCrypto-PingMachine, but is it started?"
                     , ncOutgoingQueue      = pktoq
                     }
+    -- launch dequeue thread
     threadid <- forkIO $ do
         tid <- myThreadId
         labelThread tid ("NetCryptoDequeue." ++ show (key2id remotePublicKey))
@@ -359,7 +364,12 @@ freshCryptoSession  sessions
             cd <- atomically $ PQ.dequeue pktq
             _ <- runCryptoHook (netCryptoSession0 {ncDequeueThread=Just tid}) cd
             loop
-    let netCryptoSession = netCryptoSession0 {ncDequeueThread=Just threadid}
+    -- launch ping thread
+    fuzz <- randomRIO (0,2000)
+    pingMachine <- forkPingMachine ("NetCrypto." ++ show (key2id remotePublicKey)) (15000 + fuzz) 2000
+    -- update session with thread ids
+    let netCryptoSession = netCryptoSession0 {ncDequeueThread=Just threadid, ncPingMachine=Just pingMachine}
+    -- add this session to the lookup maps
     atomically $ do
         modifyTVar allsessions (Map.insert addr netCryptoSession)
         byKeyResult <- readTVar allsessionsByKey >>= return . Map.lookup remotePublicKey
@@ -459,7 +469,9 @@ cryptoNetHandler sessions addr (NetCrypto (CryptoPacket nonce16 encrypted)) = do
     -- Handle Encrypted Message
     case Map.lookup addr sessionsmap of
         Nothing -> return Nothing -- drop packet, we have no session
-        Just session@(NCrypto {ncIncomingTypeArray, ncState, ncPacketQueue, ncHooks,ncSessionSecret,ncTheirSessionPublic,ncTheirBaseNonce}) -> do
+        Just session@(NCrypto { ncIncomingTypeArray, ncState, ncPacketQueue, ncHooks,
+                                ncSessionSecret, ncTheirSessionPublic, ncTheirBaseNonce,
+                                ncPingMachine}) -> do
             theirBaseNonce <- atomically $ readTVar ncTheirBaseNonce
             -- Try to decrypt message
             let diff :: Word16
@@ -488,6 +500,10 @@ cryptoNetHandler sessions addr (NetCrypto (CryptoPacket nonce16 encrypted)) = do
                             writeTVar ncTheirBaseNonce y
                     -- then set session confirmed,
                     atomically $ writeTVar ncState Confirmed
+                    -- bump ping machine
+                    case ncPingMachine of
+                        Just pingMachine -> pingBump pingMachine
+                        Nothing -> return ()
                     msgTypes <- atomically $ readTVar ncIncomingTypeArray
                     let msgTyp = cd ^. messageType
                         msgTypMapped16 = msgTypes A.! fromEnum8 (msgID cm)
-- 
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