From add36aaffd9ef06ca9c6f2a73a185ba531581c25 Mon Sep 17 00:00:00 2001
From: joe <joe@jerkface.net>
Date: Mon, 13 Nov 2017 05:19:50 -0500
Subject: Added PacketQueue for handling inbound netcrypto packets.

---
 src/Network/Tox/Crypto/Handlers.hs | 14 ++++++++++++--
 1 file changed, 12 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 13db02f3..787c69c2 100644
--- a/src/Network/Tox/Crypto/Handlers.hs
+++ b/src/Network/Tox/Crypto/Handlers.hs
@@ -18,6 +18,8 @@ import qualified Data.ByteString  as B
 import Data.ByteString (ByteString)
 import Control.Lens
 import Data.Function
+import qualified Data.PacketQueue as PQ
+         ;import Data.PacketQueue (PacketQueue)
 import Data.Serialize             as S
 import Data.Word
 import GHC.Conc (unsafeIOToSTM)
@@ -63,7 +65,7 @@ data NetCryptoSession = NCrypto { ncState         :: TVar NetCryptoSessionStatus
                                 , ncTheirBaseNonce :: TVar Nonce24 -- base nonce + packet number
                                 , ncMyPacketNonce :: TVar Nonce24 -- base nonce + packet number
                                 , ncHandShake     :: TVar (Maybe (Handshake Encrypted))
-                                , ncCookie        :: TVar (Maybe Cookie)
+                                , ncCookie        :: TVar (Maybe Cookie) -- ^ Cookie issued by remote peer
                                 , ncTheirDHTKey   :: PublicKey
                                 , ncTheirSessionPublic :: Maybe PublicKey
                                 , ncSessionSecret :: SecretKey
@@ -80,6 +82,8 @@ data NetCryptoSession = NCrypto { ncState         :: TVar NetCryptoSessionStatus
                                                                      --   needs to possibly start another, as is
                                                                      --   the case in group chats
                                 , ncView :: TVar SessionView
+                                , ncPacketQueue :: PacketQueue CryptoMessage
+                                , ncBufferStart :: TVar Word32
                                 }
 
 data NetCryptoSessions = NCSessions { netCryptoSessions :: TVar (Map.Map SockAddr NetCryptoSession)
@@ -88,6 +92,7 @@ data NetCryptoSessions = NCSessions { netCryptoSessions :: TVar (Map.Map SockAdd
                                     , defaultUnrecognizedHook :: MessageType -> NetCryptoHook
                                     , sessionView :: SessionView
                                     , msgTypeArray :: MsgTypeArray
+                                    , inboundQueueCapacity :: Word32
                                     }
 
 newSessionsState :: TransportCrypto
@@ -120,6 +125,7 @@ newSessionsState crypto unrechook hooks = do
                                                   , svDownloadDir = svDownloadDir0
                                                   }
                       , msgTypeArray = allMsgTypes -- todo make this a parameter
+                      , inboundQueueCapacity = 200
                       }
 
 data HandshakeParams
@@ -195,6 +201,8 @@ freshCryptoSession  sessions
     ncUnrecognizedHook0 <- atomically $ newTVar (defaultUnrecognizedHook sessions)
     ncMessageTypes0 <- atomically $ newTVar (msgTypeArray sessions)
     ncView0 <- atomically $ newTVar (sessionView sessions)
+    pktq <- atomically $ PQ.new (inboundQueueCapacity sessions) 0
+    bufstart <- atomically $ newTVar 0
     let netCryptoSession =
             NCrypto { ncState         = ncState0
                     , ncTheirBaseNonce= ncTheirBaseNonce0
@@ -210,6 +218,8 @@ freshCryptoSession  sessions
                     , ncAllSessions = sessions
                     , ncMessageTypes = ncMessageTypes0
                     , ncView = ncView0
+                    , ncPacketQueue        = pktq
+                    , ncBufferStart        = bufstart
                     }
     atomically $ modifyTVar allsessions (Map.insert addr netCryptoSession)
 
@@ -224,7 +234,7 @@ updateCryptoSession sessions addr hp session = do
         -- duplicate handshake packet, otherwise disregard everything, and
         -- refresh all state.
         --
-     then when (  Just ncTheirBaseNonce0 /= hpTheirBaseNonce hp
+     then when (  Just ncTheirBaseNonce0 /= hpTheirBaseNonce hp -- XXX: Do we really want to compare base nonce here?
                || ncTheirDHTKey session /= hpCookieRemoteDhtkey hp
                ) $ freshCryptoSession sessions addr hp
      else if ( Just ncTheirBaseNonce0 /= hpTheirBaseNonce hp)
-- 
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