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|
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE LambdaCase #-}
module Network.Tox.ContactInfo where
import Connection
import Data.Time.Clock.POSIX
import Control.Concurrent.STM
import Control.Monad
import Crypto.PubKey.Curve25519
import qualified Data.HashMap.Strict as HashMap
;import Data.HashMap.Strict (HashMap)
import Data.Maybe
import Network.Tox.DHT.Transport as DHT
import Network.Tox.NodeId (id2key)
import Network.Tox.Onion.Transport as Onion
import DPut
newtype ContactInfo extra = ContactInfo
-- | Map our toxid public key to an Account record.
{ accounts :: TVar (HashMap NodeId{-my userkey-} (Account extra))
}
data Account extra = Account
{ userSecret :: SecretKey -- local secret key
, contacts :: TVar (HashMap NodeId{-friend's userkey-} Contact) -- received contact info
, accountExtra :: TVar extra
, eventChan :: TChan ContactEvent
}
data ContactEvent = OnionRouted { contact :: PublicKey, onionRouted :: OnionData }
| PolicyChange { contact :: PublicKey, policyChange :: Policy }
| AddrChange { contact :: PublicKey, addrChange :: NodeInfo }
| SessionEstablished { contact :: PublicKey }
| SessionTerminated { contact :: PublicKey }
data Contact = Contact
{ contactKeyPacket :: TVar (Maybe (POSIXTime,DHT.DHTPublicKey))
, contactLastSeenAddr :: TVar (Maybe (POSIXTime,NodeInfo))
, contactFriendRequest :: TVar (Maybe (POSIXTime,DHT.FriendRequest))
, contactPolicy :: TVar (Maybe Connection.Policy)
}
newContactInfo :: IO (ContactInfo extra)
newContactInfo = atomically $ ContactInfo <$> newTVar HashMap.empty
myKeyPairs :: ContactInfo extra -> STM [(SecretKey,PublicKey)]
myKeyPairs (ContactInfo accounts) = do
acnts <- readTVar accounts
forM (HashMap.toList acnts) $ \(nid, Account{userSecret}) -> do
return (userSecret,id2key nid)
updateContactInfo :: ContactInfo extra -> Onion.AnnouncedRendezvous -> (PublicKey,Onion.OnionData) -> IO ()
updateContactInfo roster Onion.AnnouncedRendezvous{remoteUserKey} (localUserKey,omsg) = do
dput XMisc "updateContactInfo!!!"
now <- getPOSIXTime
atomically $ do
as <- readTVar (accounts roster)
maybe (return ())
(updateAccount now remoteUserKey omsg)
$ HashMap.lookup (key2id localUserKey) as
initContact :: STM Contact
initContact = Contact <$> newTVar Nothing
<*> newTVar Nothing
<*> newTVar Nothing
<*> newTVar Nothing
getContact :: PublicKey -> Account extra -> STM (Maybe Contact)
getContact remoteUserKey acc = do
let rkey = key2id remoteUserKey
cmap <- readTVar (contacts acc)
return $ HashMap.lookup rkey cmap
updateAccount' :: PublicKey -> Account extra -> (Contact -> STM ()) -> STM ()
updateAccount' remoteUserKey acc updater = do
let rkey = key2id remoteUserKey
cmap <- readTVar (contacts acc)
contact <- case HashMap.lookup rkey cmap of
Just contact -> return contact
Nothing -> do contact <- initContact
writeTVar (contacts acc) $ HashMap.insert rkey contact cmap
return contact
updater contact
updateAccount :: POSIXTime -> PublicKey -> Onion.OnionData -> Account extra -> STM ()
updateAccount now remoteUserKey omsg acc = do
updateAccount' remoteUserKey acc $ onionUpdate now omsg
writeTChan (eventChan acc) $ OnionRouted remoteUserKey omsg
onionUpdate :: POSIXTime -> OnionData -> Contact -> STM ()
onionUpdate now (Onion.OnionDHTPublicKey dhtpk) contact
= writeTVar (contactKeyPacket contact) $ Just (now,dhtpk)
onionUpdate now (Onion.OnionFriendRequest fr) contact
= writeTVar (contactFriendRequest contact) $ Just (now,fr)
policyUpdate :: Policy -> Contact -> STM ()
policyUpdate policy contact = writeTVar (contactPolicy contact) $ Just policy
addrUpdate :: POSIXTime -> NodeInfo -> Contact -> STM ()
addrUpdate now addr contact = writeTVar (contactLastSeenAddr contact) $ Just (now,addr)
setContactPolicy :: PublicKey -> Policy -> Account extra -> STM ()
setContactPolicy remoteUserKey policy acc = do
updateAccount' remoteUserKey acc $ policyUpdate policy
writeTChan (eventChan acc) $ PolicyChange remoteUserKey policy
setContactAddr :: POSIXTime -> PublicKey -> NodeInfo -> Account extra -> STM ()
setContactAddr now remoteUserKey addr acc = do
contact <- getContact remoteUserKey acc
let update = updateAccount' remoteUserKey acc $ addrUpdate now addr
let notify = writeTChan (eventChan acc) $ AddrChange remoteUserKey addr
join <$> traverse (readTVar . contactLastSeenAddr) contact >>= \case
Just (_, a) | addr == a -> update -- updates time only
Just (t, _) | now > t + 60 -> update >> notify -- update IP if existing one is old
Nothing -> update >> notify -- or if we don't have any
_ -> return () -- otherwise just wait
setEstablished :: PublicKey -> Account extra -> STM ()
setEstablished remoteUserKey acc =
writeTChan (eventChan acc) $ SessionEstablished remoteUserKey
setTerminated :: PublicKey -> Account extra -> STM ()
setTerminated remoteUserKey acc =
writeTChan (eventChan acc) $ SessionTerminated remoteUserKey
addContactInfo :: ContactInfo extra -> SecretKey -> extra -> STM ()
addContactInfo (ContactInfo as) sk extra = do
a <- newAccount sk extra
modifyTVar' as $ HashMap.insert (key2id $ toPublic sk) a
delContactInfo :: ContactInfo extra -> PublicKey -> STM ()
delContactInfo (ContactInfo as) pk = modifyTVar' as $ HashMap.delete (key2id pk)
newAccount :: SecretKey -> extra -> STM (Account extra)
newAccount sk extra = Account sk <$> newTVar HashMap.empty
<*> newTVar extra
<*> newBroadcastTChan
dnsPresentation :: ContactInfo extra -> STM String
dnsPresentation (ContactInfo accsvar) = do
accs <- readTVar accsvar
ms <- forM accs $ \Account { userSecret = sec, contacts = cvar } -> do
cs <- readTVar cvar
rs <- forM (HashMap.toList cs) $ \(nid,c) -> do
mkpkt <- readTVar (contactKeyPacket c)
return $ fmap (\(_,d) -> (nid,d)) mkpkt
return $
"; local key = " ++ show (key2id $ toPublic sec) ++ "\n"
++ concatMap dnsPresentation1 (catMaybes rs)
return $ concat ms
dnsPresentation1 :: (NodeId,DHTPublicKey) -> String
dnsPresentation1 (nid,dk) = unlines
[ concat [ show nid, ".tox. IN CNAME ", show (key2id $ dhtpk dk), ".dht." ]
]
type LocalKey = NodeId
type RemoteKey = NodeId
friendRequests :: ContactInfo extra -> STM (HashMap LocalKey [(RemoteKey,DHT.FriendRequest)])
friendRequests (ContactInfo roster) = do
accs <- readTVar roster
forM accs $ \Account { userSecret = sec, contacts = cvar } -> do
cs <- readTVar cvar
rs <- forM (HashMap.toList cs) $ \(nid,c) -> do
mfr <- readTVar (contactFriendRequest c)
return $ fmap (\(_,x) -> (nid,x)) mfr
return $ catMaybes rs
|
