From a33fd34516e405d29654dff85df235b3c26ab565 Mon Sep 17 00:00:00 2001
From: "jim@bo" <jim@bo>
Date: Thu, 21 Jun 2018 04:26:54 -0400
Subject: netCrypto packet-request thread wip

---
 src/Network/Tox/Crypto/Handlers.hs | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'src')

diff --git a/src/Network/Tox/Crypto/Handlers.hs b/src/Network/Tox/Crypto/Handlers.hs
index ae8ce873..ea5c0f98 100644
--- a/src/Network/Tox/Crypto/Handlers.hs
+++ b/src/Network/Tox/Crypto/Handlers.hs
@@ -342,6 +342,10 @@ data NetCryptoSession = NCrypto
     -- ^ a buffer in which incoming packets may be stored out of order
     -- but from which they may be extracted in sequence,
     -- helps ensure lossless packets are processed in order
+    , ncRequestInterval    :: TVar Int
+    -- ^ How long (in microseconds) to wait between packet requests
+    , ncRequestThread      :: TVar (Maybe ThreadId)
+    -- ^ thread which sends packet requests
     , ncDequeueThread      :: TVar (Maybe ThreadId)
     -- ^ when the thread which dequeues from ncPacketQueue
     -- is started, its ThreadId is stored here
@@ -605,6 +609,8 @@ freshCryptoSession  sessions
     dmsg $ "freshCryptoSession: Session ncTheirBaseNonce=" ++ show theirbasenonce
     dmsg $ "freshCryptoSession: My Session Public =" ++ show (key2id $ toPublic newsession)
     ncTheirSessionPublic0 <- newTVar (frmMaybe mbtheirSessionKey)
+    ncRequestInterval0 <- newTVar 250000 -- quarter of a second
+    ncRequestThread0 <- newTVar Nothing
     ncDequeueThread0 <- newTVar Nothing
     ncDequeueOutGoingThread0 <- newTVar Nothing
     ncPingMachine0 <- newTVar Nothing
@@ -631,6 +637,8 @@ freshCryptoSession  sessions
                     , ncOutgoingIdMapEscapedLossless = losslessEscapeIdMap
                     , ncView               = ncView0
                     , ncPacketQueue        = pktq
+                    , ncRequestInterval    = ncRequestInterval0
+                    , ncRequestThread         = ncRequestThread0
                     , ncDequeueThread         = ncDequeueThread0
                     , ncDequeueOutGoingThread = ncDequeueOutGoingThread0
                     , ncPingMachine           = ncPingMachine0
@@ -737,6 +745,25 @@ runUponHandshake netCryptoSession0 addr pktoq = do
             _ <- runCryptoHook netCryptoSession0 (bufferData cd)
             loop
     dput XNetCrypto $ "runUponHandshake: " ++ show threadid ++ " = NetCryptoDequeue." ++ show (key2id remotePublicKey) ++ sidStr
+    -- launch request thread
+    -- (In terms of data dependency, this thread could be launched prior to handshake)
+    threadid <- forkIO $ do
+        tid <- myThreadId
+        atomically $ writeTVar (ncDequeueThread netCryptoSession0) (Just tid)
+        labelThread tid ("NetCryptoRequest." ++ show (key2id remotePublicKey) ++ sidStr)
+        fix $ \loop -> do
+            atomically (readTVar (ncRequestInterval netCryptoSession0)) >>= threadDelay
+            result <- atomically $ PQ.dequeueOrGetMissing pktq
+            case result of
+                Right cd -> do
+                    dput XNetCrypto $ "Dequeued(Request Thread)::" ++ show (bufferData cd) ++ " now running hook..."
+                    _ <- runCryptoHook netCryptoSession0 (bufferData cd)
+                    return ()
+                Left nums -> do
+                    dput XNetCrypto $ "(Request Thread) Missing Packets detected:" ++ show nums
+                    dput XNetCrypto $ "TODO: compose PacketRequest message and send it."
+            loop
+    dput XNetCrypto $ "runUponHandshake: " ++ show threadid ++ " = NetCryptoRequest." ++ show (key2id remotePublicKey) ++ sidStr
     -- launch dequeueOutgoing thread
     threadidOutgoing <- forkIO $ do
         tid <- myThreadId
-- 
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