gameServer/HWProtoNEState.hs
author unc0rr
Sat, 08 Mar 2014 22:49:13 +0400
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child 10212 5fb3bb2de9d2
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{-# LANGUAGE OverloadedStrings, CPP #-}
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module HWProtoNEState where
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import Control.Monad.Reader
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import qualified Data.ByteString.Lazy as BL
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import qualified Data.ByteString.Char8 as B
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import Data.Digest.Pure.SHA
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--------------------------------------
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import CoreTypes
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import Actions
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import Utils
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import RoomsAndClients
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handleCmd_NotEntered :: CmdHandler
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handleCmd_NotEntered ["NICK", newNick] = do
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    (ci, irnc) <- ask
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    let cl = irnc `client` ci
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    if not . B.null $ nick cl then return [ProtocolError $ loc "Nickname already chosen"]
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        else
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        if illegalName newNick then return [ByeClient $ loc "Illegal nickname"]
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            else
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            return $
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                ModifyClient (\c -> c{nick = newNick}) :
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                AnswerClients [sendChan cl] ["NICK", newNick] :
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                [CheckRegistered | clientProto cl /= 0]
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handleCmd_NotEntered ["PROTO", protoNum] = do
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    (ci, irnc) <- ask
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    let cl = irnc `client` ci
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    if clientProto cl > 0 then return [ProtocolError $ loc "Protocol already known"]
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        else
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        if parsedProto == 0 then return [ProtocolError $ loc "Bad number"]
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            else
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            return $
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                ModifyClient (\c -> c{clientProto = parsedProto}) :
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                AnswerClients [sendChan cl] ["PROTO", showB parsedProto] :
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                [CheckRegistered | not . B.null $ nick cl]
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    where
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        parsedProto = readInt_ protoNum
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handleCmd_NotEntered ["PASSWORD", passwd] = do
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    (ci, irnc) <- ask
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    let cl = irnc `client` ci
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    if clientProto cl < 48 && passwd == webPassword cl then
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        return $ JoinLobby : [AnswerClients [sendChan cl] ["ADMIN_ACCESS"] | isAdministrator cl]
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        else
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        return [ByeClient "Authentication failed"]
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handleCmd_NotEntered ["PASSWORD", passwd, clientSalt] = do
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    (ci, irnc) <- ask
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    let cl = irnc `client` ci
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    let clientHash = h [clientSalt, serverSalt cl, webPassword cl, showB $ clientProto cl, "!hedgewars"]
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    let serverHash = h [serverSalt cl, clientSalt, webPassword cl, showB $ clientProto cl, "!hedgewars"]
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    if passwd == clientHash then
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        return [
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            AnswerClients [sendChan cl] ["SERVER_AUTH", serverHash] 
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            , JoinLobby
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            ]
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        else
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        return [ByeClient "Authentication failed"]
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    where
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        h = B.pack . showDigest . sha1 . BL.fromChunks
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#if defined(OFFICIAL_SERVER)
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handleCmd_NotEntered ["CHECKER", protoNum, newNick, password] = do
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    (ci, irnc) <- ask
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    let cl = irnc `client` ci
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    if parsedProto == 0 then return [ProtocolError $ loc "Bad number"]
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        else
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        return $ [
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            ModifyClient (\c -> c{clientProto = parsedProto, nick = newNick, webPassword = password, isChecker = True})
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            , CheckRegistered]
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    where
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        parsedProto = readInt_ protoNum
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#endif
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handleCmd_NotEntered _ = return [ProtocolError "Incorrect command (state: not entered)"]