gameServer/Actions.hs
author unc0rr
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child 1931 ffe420e9e61a
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Fix server crash (properly follow client's state)
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module Actions where
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import Control.Concurrent.STM
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import Control.Concurrent.Chan
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import Data.IntMap
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import qualified Data.IntSet as IntSet
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import qualified Data.Sequence as Seq
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import System.Log.Logger
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import Monad
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import Data.Time
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import Maybe
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-----------------------------
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import CoreTypes
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import Utils
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data Action =
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	AnswerThisClient [String]
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	| AnswerAll [String]
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	| AnswerAllOthers [String]
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	| AnswerThisRoom [String]
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	| AnswerOthersInRoom [String]
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	| AnswerLobby [String]
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	| SendServerMessage
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	| RoomAddThisClient Int -- roomID
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	| RoomRemoveThisClient
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	| RemoveTeam String
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	| RemoveRoom
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	| UnreadyRoomClients
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	| MoveToLobby
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	| ProtocolError String
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	| Warning String
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	| ByeClient String
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	| KickClient Int -- clID
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	| KickRoomClient Int -- clID
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	| BanClient String -- nick
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	| RemoveClientTeams Int -- clID
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	| ModifyClient (ClientInfo -> ClientInfo)
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	| ModifyRoom (RoomInfo -> RoomInfo)
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	| ModifyServerInfo (ServerInfo -> ServerInfo)
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	| AddRoom String String
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	| CheckRegistered
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	| ProcessAccountInfo AccountInfo
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	| Dump
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	| AddClient ClientInfo
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	| PingAll
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type CmdHandler = Int -> Clients -> Rooms -> [String] -> [Action]
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replaceID a (b, c, d, e) = (a, c, d, e)
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processAction :: (Int, ServerInfo, Clients, Rooms) -> Action -> IO (Int, ServerInfo, Clients, Rooms)
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processAction (clID, serverInfo, clients, rooms) (AnswerThisClient msg) = do
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	writeChan (sendChan $ clients ! clID) msg
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	return (clID, serverInfo, clients, rooms)
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processAction (clID, serverInfo, clients, rooms) (AnswerAll msg) = do
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	mapM_ (\cl -> writeChan (sendChan cl) msg) (elems clients)
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	return (clID, serverInfo, clients, rooms)
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processAction (clID, serverInfo, clients, rooms) (AnswerAllOthers msg) = do
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	mapM_ (\id -> writeChan (sendChan $ clients ! id) msg) $
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		Prelude.filter (\id' -> (id' /= clID) && (logonPassed $ clients ! id')) (keys clients)
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	return (clID, serverInfo, clients, rooms)
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processAction (clID, serverInfo, clients, rooms) (AnswerThisRoom msg) = do
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	mapM_ (\id -> writeChan (sendChan $ clients ! id) msg) roomClients
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	return (clID, serverInfo, clients, rooms)
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	where
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		roomClients = IntSet.elems $ playersIDs room
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		room = rooms ! rID
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		rID = roomID client
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		client = clients ! clID
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processAction (clID, serverInfo, clients, rooms) (AnswerOthersInRoom msg) = do
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	mapM_ (\id -> writeChan (sendChan $ clients ! id) msg) $ Prelude.filter (/= clID) roomClients
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	return (clID, serverInfo, clients, rooms)
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	where
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		roomClients = IntSet.elems $ playersIDs room
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		room = rooms ! rID
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		rID = roomID client
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		client = clients ! clID
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processAction (clID, serverInfo, clients, rooms) (AnswerLobby msg) = do
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	mapM_ (\id -> writeChan (sendChan $ clients ! id) msg) roomClients
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	return (clID, serverInfo, clients, rooms)
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	where
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		roomClients = IntSet.elems $ playersIDs room
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		room = rooms ! 0
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processAction (clID, serverInfo, clients, rooms) SendServerMessage = do
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	writeChan (sendChan $ clients ! clID) $ ["SERVER_MESSAGE", serverMessage serverInfo]
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	return (clID, serverInfo, clients, rooms)
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processAction (clID, serverInfo, clients, rooms) (ProtocolError msg) = do
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	writeChan (sendChan $ clients ! clID) ["ERROR", msg]
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	return (clID, serverInfo, clients, rooms)
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processAction (clID, serverInfo, clients, rooms) (Warning msg) = do
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	writeChan (sendChan $ clients ! clID) ["WARNING", msg]
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	return (clID, serverInfo, clients, rooms)
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processAction (clID, serverInfo, clients, rooms) (ByeClient msg) = do
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	(_, _, newClients, newRooms) <-
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			if roomID client /= 0 then
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				processAction  (clID, serverInfo, clients, rooms)
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					(if isMaster client then RemoveRoom else RemoveClientTeams clID)
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				else
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					return (clID, serverInfo, clients, rooms)
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	mapM_ (processAction (clID, serverInfo, newClients, newRooms)) $ answerOthersQuit ++ answerInformRoom
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	writeChan (sendChan $ clients ! clID) ["BYE", msg]
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	return (
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			0,
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			serverInfo,
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			delete clID newClients,
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			adjust (\r -> r{
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					playersIDs = IntSet.delete clID (playersIDs r),
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					playersIn = (playersIn r) - 1,
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					readyPlayers = if isReady client then readyPlayers r - 1 else readyPlayers r
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					}) (roomID $ newClients ! clID) newRooms
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			)
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	where
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		client = clients ! clID
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		clientNick = nick client
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		answerInformRoom =
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			if roomID client /= 0 then
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				if not $ Prelude.null msg then
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					[AnswerThisRoom ["LEFT", clientNick, msg]]
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				else
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					[AnswerThisRoom ["LEFT", clientNick]]
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			else
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				[]
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		answerOthersQuit =
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			if logonPassed client then
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				if not $ Prelude.null msg then
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					[AnswerAll ["LOBBY:LEFT", clientNick, msg]]
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				else
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					[AnswerAll ["LOBBY:LEFT", clientNick]]
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			else
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				[]
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processAction (clID, serverInfo, clients, rooms) (ModifyClient func) = do
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	return (clID, serverInfo, adjust func clID clients, rooms)
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processAction (clID, serverInfo, clients, rooms) (ModifyRoom func) = do
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	return (clID, serverInfo, clients, adjust func rID rooms)
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	where
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		rID = roomID $ clients ! clID
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processAction (clID, serverInfo, clients, rooms) (ModifyServerInfo func) = do
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	return (clID, func serverInfo, clients, rooms)
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processAction (clID, serverInfo, clients, rooms) (RoomAddThisClient rID) = do
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	processAction (
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		clID,
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		serverInfo,
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		adjust (\cl -> cl{roomID = rID}) clID clients,
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		adjust (\r -> r{playersIDs = IntSet.insert clID (playersIDs r), playersIn = (playersIn r) + 1}) rID $
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			adjust (\r -> r{playersIDs = IntSet.delete clID (playersIDs r)}) 0 rooms
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		) joinMsg
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	where
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		client = clients ! clID
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		joinMsg = if rID == 0 then
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				AnswerAllOthers ["LOBBY:JOINED", nick client]
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			else
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				AnswerThisRoom ["JOINED", nick client]
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processAction (clID, serverInfo, clients, rooms) (RoomRemoveThisClient) = do
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	when (rID /= 0) $ (processAction (clID, serverInfo, clients, rooms) $ AnswerOthersInRoom ["LEFT", nick client, "part"]) >> return ()
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	return (
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		clID,
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		serverInfo,
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		adjust (\cl -> cl{roomID = 0, isMaster = False, isReady = False}) clID clients,
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		adjust (\r -> r{
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				playersIDs = IntSet.delete clID (playersIDs r),
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				playersIn = (playersIn r) - 1,
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				readyPlayers = if isReady client then (readyPlayers r) - 1 else readyPlayers r
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				}) rID $
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			adjust (\r -> r{playersIDs = IntSet.insert clID (playersIDs r)}) 0 rooms
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		)
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	where
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		rID = roomID client
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		client = clients ! clID
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processAction (clID, serverInfo, clients, rooms) (AddRoom roomName roomPassword) = do
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	let newServerInfo = serverInfo {nextRoomID = newID}
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	let room = newRoom{
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			roomUID = newID,
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			name = roomName,
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			password = roomPassword,
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			roomProto = (clientProto client)
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			}
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	processAction (clID, serverInfo, clients, rooms) $ AnswerLobby ["ROOM", "ADD", roomName]
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	processAction (
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		clID,
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		newServerInfo,
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		adjust (\cl -> cl{isMaster = True}) clID clients,
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		insert newID room rooms
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		) $ RoomAddThisClient newID
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	where
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		newID = (nextRoomID serverInfo) - 1
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		client = clients ! clID
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   222
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processAction (clID, serverInfo, clients, rooms) (RemoveRoom) = do
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	processAction (clID, serverInfo, clients, rooms) $ AnswerLobby ["ROOM", "DEL", name room]
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	processAction (clID, serverInfo, clients, rooms) $ AnswerOthersInRoom ["ROOMABANDONED", name room]
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	return (clID,
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		serverInfo,
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		Data.IntMap.map (\cl -> if roomID cl == rID then cl{roomID = 0, isMaster = False, isReady = False} else cl) clients,
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		delete rID $ adjust (\r -> r{playersIDs = IntSet.union (playersIDs room) (playersIDs r)}) 0 rooms
1804
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		)
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	where
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		room = rooms ! rID
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		rID = roomID client
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		client = clients ! clID
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processAction (clID, serverInfo, clients, rooms) (UnreadyRoomClients) = do
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	processAction (clID, serverInfo, clients, rooms) $ AnswerThisRoom ("NOT_READY" : roomPlayers)
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	return (clID,
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		serverInfo,
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		Data.IntMap.map (\cl -> if roomID cl == rID then cl{isReady = False} else cl) clients,
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		adjust (\r -> r{readyPlayers = 0}) rID rooms)
1811
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	where
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		room = rooms ! rID
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		rID = roomID client
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		client = clients ! clID
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		roomPlayers = Prelude.map (nick . (clients !)) roomPlayersIDs
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		roomPlayersIDs = IntSet.elems $ playersIDs room
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   250
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   251
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processAction (clID, serverInfo, clients, rooms) (RemoveTeam teamName) = do
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	newRooms <-	if not $ gameinprogress room then
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			do
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			processAction (clID, serverInfo, clients, rooms) $ AnswerOthersInRoom ["REMOVE_TEAM", teamName]
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			return $
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				adjust (\r -> r{teams = Prelude.filter (\t -> teamName /= teamname t) $ teams r}) rID rooms
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		else
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			do
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			processAction (clID, serverInfo, clients, rooms) $ AnswerOthersInRoom ["EM", rmTeamMsg]
1813
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			return $
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				adjust (\r -> r{
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				teams = Prelude.filter (\t -> teamName /= teamname t) $ teams r,
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				leftTeams = teamName : leftTeams r,
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				roundMsgs = roundMsgs r Seq.|> rmTeamMsg
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				}) rID rooms
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	return (clID, serverInfo, clients, newRooms)
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	where
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		room = rooms ! rID
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		rID = roomID client
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		client = clients ! clID
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		rmTeamMsg = toEngineMsg $ 'F' : teamName
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   274
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processAction (clID, serverInfo, clients, rooms) (CheckRegistered) = do
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	writeChan (dbQueries serverInfo) $ CheckAccount client
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	return (clID, serverInfo, clients, rooms)
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	where
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		client = clients ! clID
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   281
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processAction (clID, serverInfo, clients, rooms) (Dump) = do
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   283
	writeChan (sendChan $ clients ! clID) ["DUMP", show serverInfo, showTree clients, showTree rooms]
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	return (clID, serverInfo, clients, rooms)
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   285
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   286
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processAction (clID, serverInfo, clients, rooms) (ProcessAccountInfo info) = do
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956b6b3529bc Send server message on join
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	processAction (clID, serverInfo, clients, rooms) SendServerMessage
1839
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	case info of
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		HasAccount passwd isAdmin -> do
1839
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			infoM "Clients" $ show clID ++ " has account"
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			writeChan (sendChan $ clients ! clID) ["ASKPASSWORD"]
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			return (clID, serverInfo, adjust (\cl -> cl{webPassword = passwd, isAdministrator = isAdmin}) clID clients, rooms)
1839
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		Guest -> do
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			infoM "Clients" $ show clID ++ " is guest"
1841
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			processAction (clID, serverInfo, adjust (\cl -> cl{logonPassed = True}) clID clients, rooms) MoveToLobby
1921
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		Admin -> do
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			infoM "Clients" $ show clID ++ " is admin"
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			foldM processAction (clID, serverInfo, adjust (\cl -> cl{logonPassed = True, isAdministrator = True}) clID clients, rooms) [MoveToLobby, AnswerThisClient ["ADMIN_ACCESS"]]
1841
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   300
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processAction (clID, serverInfo, clients, rooms) (MoveToLobby) = do
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   303
	foldM processAction (clID, serverInfo, clients, rooms) $
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		(RoomAddThisClient 0)
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		: answerLobbyNicks
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		-- ++ (answerServerMessage client clients)
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   307
	where
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		lobbyNicks = Prelude.map nick $ Prelude.filter logonPassed $ elems clients
1841
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		answerLobbyNicks = if not $ Prelude.null lobbyNicks then
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					[AnswerThisClient (["LOBBY:JOINED"] ++ lobbyNicks)]
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				else
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   312
					[]
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   313
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   314
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processAction (clID, serverInfo, clients, rooms) (KickClient kickID) = do
1879
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	liftM2 replaceID (return clID) (processAction (kickID, serverInfo, clients, rooms) $ ByeClient "Kicked")
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   317
1926
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   318
1921
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   319
processAction (clID, serverInfo, clients, rooms) (BanClient banNick) = do
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   320
	return (clID, serverInfo, clients, rooms)
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   321
1879
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   322
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   323
processAction (clID, serverInfo, clients, rooms) (KickRoomClient kickID) = do
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   324
	writeChan (sendChan $ clients ! kickID) ["KICKED"]
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   325
	liftM2 replaceID (return clID) (processAction (kickID, serverInfo, clients, rooms) $ RoomRemoveThisClient)
bb114339eb4e Implement kick from room
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   326
bb114339eb4e Implement kick from room
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   327
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   328
processAction (clID, serverInfo, clients, rooms) (RemoveClientTeams teamsClID) = do
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   329
	liftM2 replaceID (return clID) $
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   330
		foldM processAction (teamsClID, serverInfo, clients, rooms) $ removeTeamsActions
bb114339eb4e Implement kick from room
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   331
	where
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   332
		client = clients ! teamsClID
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   333
		room = rooms ! (roomID client)
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   334
		teamsToRemove = Prelude.filter (\t -> teamowner t == nick client) $ teams room
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   335
		removeTeamsActions = Prelude.map (RemoveTeam . teamname) teamsToRemove
1926
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   336
cb46fbdcaa41 Add simple DoS protection mechanism (although better than previous server had)
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   337
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   338
processAction (clID, serverInfo, clients, rooms) (AddClient client) = do
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   339
	let updatedClients = insert (clientUID client) client clients
1927
e2031906a347 Ping clients every 30 seconds. Disconnection due to ping timeout to be implemented.
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   340
	infoM "Clients" ((show $ clientUID client) ++ ": New client. Time: " ++ (show $ connectTime client))
1926
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   341
	writeChan (sendChan $ client) ["CONNECTED", "Hedgewars server http://www.hedgewars.org/"]
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   342
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   343
	let newLogins = takeWhile (\(_ , time) -> (connectTime client) `diffUTCTime` time <= 20) $ lastLogins serverInfo
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--	if isJust $ host client `Prelude.lookup` newLogins then
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--		processAction (clID, serverInfo{lastLogins = newLogins}, updatedClients, rooms) $ ByeClient "Reconnected too fast"
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--		else
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	return (clID, serverInfo{lastLogins = (host client, connectTime client) : newLogins}, updatedClients, rooms)
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processAction (clID, serverInfo, clients, rooms) PingAll = do
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	(_, _, newClients, newRooms) <- foldM kickTimeouted (clID, serverInfo, clients, rooms) $ elems clients
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	processAction (clID,
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		serverInfo,
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		Data.IntMap.map (\cl -> cl{pingsQueue = pingsQueue cl + 1}) newClients,
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		newRooms) $ AnswerAll ["PING"]
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	where
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		kickTimeouted (clID, serverInfo, clients, rooms) client =
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			if pingsQueue client > 0 then
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				processAction (clientUID client, serverInfo, clients, rooms) $ ByeClient "Ping timeout"
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				else
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				return (clID, serverInfo, clients, rooms)