author | sheepluva |
Tue, 22 Jun 2021 22:13:55 +0200 | |
changeset 15824 | d5c37e78ab83 |
parent 12113 | 72f5d670bbee |
permissions | -rw-r--r-- |
{- * Hedgewars, a free turn based strategy game * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. \-} {-# LANGUAGE CPP, OverloadedStrings #-} #if defined(OFFICIAL_SERVER) module EngineInteraction(replayToDemo, checkNetCmd, toEngineMsg, drawnMapData, prependGhostPoints) where #else module EngineInteraction(checkNetCmd, toEngineMsg) where #endif import qualified Data.Set as Set import Control.Monad import qualified Codec.Binary.Base64 as Base64 import qualified Data.ByteString.Char8 as B import qualified Data.ByteString as BW import qualified Data.ByteString.Lazy as BL import qualified Data.Map as Map import qualified Data.List as L import Data.Word import Data.Int import Data.Bits import Control.Arrow import Data.Maybe import Data.Binary import Data.Binary.Put ------------- import CoreTypes import Utils #if defined(OFFICIAL_SERVER) import qualified Codec.Compression.Zlib.Internal as ZI import qualified Codec.Compression.Zlib as Z decompressWithoutExceptions :: BL.ByteString -> BL.ByteString decompressWithoutExceptions = BL.fromChunks . ZI.foldDecompressStreamWithInput chunk end err decomp where decomp = ZI.decompressST ZI.zlibFormat ZI.defaultDecompressParams chunk = (:) end _ = [] err = const $ [BW.empty] #endif toEngineMsg :: B.ByteString -> B.ByteString toEngineMsg msg = Base64.encode (fromIntegral (BW.length msg) `BW.cons` msg) {-fromEngineMsg :: B.ByteString -> Maybe B.ByteString fromEngineMsg msg = liftM BW.pack (Base64.decode (B.unpack msg) >>= removeLength) where removeLength (x:xs) = if length xs == fromIntegral x then Just xs else Nothing removeLength _ = Nothing-} em :: B.ByteString -> B.ByteString em = toEngineMsg eml :: [B.ByteString] -> B.ByteString eml = em . B.concat splitMessages :: B.ByteString -> [B.ByteString] splitMessages = L.unfoldr (\b -> if B.null b then Nothing else Just $ B.splitAt (1 + fromIntegral (BW.head b)) b) checkNetCmd :: [Word8] -> B.ByteString -> (B.ByteString, B.ByteString, Maybe (Maybe B.ByteString)) checkNetCmd teamsIndexes msg = check decoded where decoded = liftM splitMessages $ Base64.decode msg check (Left _) = (B.empty, B.empty, Nothing) check (Right msgs) = let (a, b) = (filter isLegal msgs, filter isNonEmpty a) in (encode a, encode b, lft a) encode = Base64.encode . B.concat isLegal m = (B.length m > 1) && (flip Set.member legalMessages . B.head . B.tail $ m) && not (isMalformed (B.head m) (B.tail m)) lft = foldr l Nothing l m n = let m' = B.head $ B.tail m; tst = flip Set.member in if not $ tst timedMessages m' then n else if '+' /= m' then Just Nothing else Just . Just . Base64.encode $ m isNonEmpty = (/=) '+' . B.head . B.tail legalMessages = Set.fromList $ "M#+LlRrUuDdZzAaSjJ,NpPwtgfhbc12345" ++ slotMessages slotMessages = "\128\129\130\131\132\133\134\135\136\137\138" timedMessages = Set.fromList $ "+LlRrUuDdZzAaSjJ,NpPwtgfc12345" ++ slotMessages isMalformed 'h' m | B.length m >= 3 = let hognum = m `B.index` 1; teamnum = m `BW.index` 2 in hognum < '1' || hognum > '8' || teamnum `L.notElem` teamsIndexes | otherwise = True isMalformed _ _ = False #if defined(OFFICIAL_SERVER) replayToDemo :: [TeamInfo] -> Map.Map B.ByteString B.ByteString -> Map.Map B.ByteString [B.ByteString] -> [B.ByteString] -> (Maybe GameDetails, [B.ByteString]) replayToDemo ti mParams prms msgs = if not sane then (Nothing, []) else (Just $ GameDetails scriptName infRopes vamp infattacks, concat [ [em "TD"] , maybeScript , maybeMap , [eml ["etheme ", head $ prms Map.! "THEME"]] , [eml ["eseed ", mParams Map.! "SEED"]] , [eml ["e$gmflags ", showB gameFlags]] , schemeFlags , schemeAdditional , [eml ["e$template_filter ", mParams Map.! "TEMPLATE"]] , [eml ["e$feature_size ", mParams Map.! "FEATURE_SIZE"]] , [eml ["e$mapgen ", mapgen]] , mapgenSpecific , concatMap teamSetup ti , msgs , [em "!"] ]) where keys1, keys2 :: Set.Set B.ByteString keys1 = Set.fromList ["FEATURE_SIZE", "MAP", "MAPGEN", "MAZE_SIZE", "SEED", "TEMPLATE"] keys2 = Set.fromList ["AMMO", "SCHEME", "SCRIPT", "THEME"] sane = Set.null (keys1 Set.\\ Map.keysSet mParams) && Set.null (keys2 Set.\\ Map.keysSet prms) && (not . null . drop 41 $ scheme) && (not . null . tail $ prms Map.! "AMMO") && ((B.length . head . tail $ prms Map.! "AMMO") > 200) mapGenTypes = ["+rnd+", "+maze+", "+drawn+", "+perlin+"] scriptName = head . fromMaybe ["Normal"] $ Map.lookup "SCRIPT" prms maybeScript = let s = scriptName in if s == "Normal" then [] else [eml ["escript Scripts/Multiplayer/", spaces2Underlining s, ".lua"]] maybeMap = let m = mParams Map.! "MAP" in if m `elem` mapGenTypes then [] else [eml ["emap ", m]] scheme = tail $ prms Map.! "SCHEME" mapgen = mParams Map.! "MAPGEN" mazeSizeMsg = eml ["e$maze_size ", mParams Map.! "MAZE_SIZE"] mapgenSpecific = case mapgen of "1" -> [mazeSizeMsg] "2" -> [mazeSizeMsg] "3" -> let d = head . fromMaybe [""] $ Map.lookup "DRAWNMAP" prms in if BW.length d <= 4 then [] else drawnMapData d _ -> [] gameFlags :: Word32 gameFlags = foldl (\r (b, f) -> if b == "false" then r else r .|. f) 0 $ zip scheme gameFlagConsts schemeFlags = map (\(v, (n, m)) -> eml [n, " ", showB $ (readInt_ v) * m]) $ filter (\(_, (n, _)) -> not $ B.null n) $ zip (drop (length gameFlagConsts) scheme) schemeParams schemeAdditional = let scriptParam = B.tail $ scheme !! 42 in [eml ["e$scriptparam ", scriptParam] | not $ B.null scriptParam] ammoStr :: B.ByteString ammoStr = head . tail $ prms Map.! "AMMO" ammo = let l = B.length ammoStr `div` 4; ((a, b), (c, d)) = (B.splitAt l . fst &&& B.splitAt l . snd) . B.splitAt (l * 2) $ ammoStr in (map (\(x, y) -> eml [x, " ", y]) $ zip ["eammloadt", "eammprob", "eammdelay", "eammreinf"] [a, b, c, d]) ++ [em "eammstore" | scheme !! 14 == "true" || scheme !! 20 == "false"] initHealth = scheme !! 27 teamSetup :: TeamInfo -> [B.ByteString] teamSetup t = (++) ammo $ eml ["eaddteam <hash> ", showB $ (1 + (readInt_ $ teamcolor t) :: Int) * 2113696, " ", teamname t] : em "erdriven" : eml ["efort ", teamfort t] : take (2 * hhnum t) ( concatMap (\(HedgehogInfo hname hhat) -> [ eml ["eaddhh ", showB $ difficulty t, " ", initHealth, " ", hname] , eml ["ehat ", hhat] ]) $ hedgehogs t ) infRopes = ammoStr `B.index` 7 == '9' vamp = gameFlags .&. 0x00000200 /= 0 infattacks = gameFlags .&. 0x00100000 /= 0 spaces2Underlining = B.map (\c -> if c == ' ' then '_' else c) drawnMapData :: B.ByteString -> [B.ByteString] drawnMapData = L.map (\m -> eml ["edraw ", BW.pack m]) . L.unfoldr by200 . BL.unpack . unpackDrawnMap where by200 :: [a] -> Maybe ([a], [a]) by200 [] = Nothing by200 m = Just $ L.splitAt 200 m unpackDrawnMap :: B.ByteString -> BL.ByteString unpackDrawnMap = either (const BL.empty) (decompressWithoutExceptions . BL.pack . drop 4 . BW.unpack) . Base64.decode compressWithLength :: BL.ByteString -> BL.ByteString compressWithLength b = BL.drop 8 . encode . runPut $ do put $ ((fromIntegral $ BL.length b)::Word32) mapM_ putWord8 $ BW.unpack $ BL.toStrict $ Z.compress b packDrawnMap :: BL.ByteString -> B.ByteString packDrawnMap = Base64.encode . BL.toStrict . compressWithLength prependGhostPoints :: [(Int16, Int16)] -> B.ByteString -> B.ByteString prependGhostPoints pts dm = packDrawnMap $ (runPut $ forM_ pts $ \(x, y) -> put x >> put y >> putWord8 99) `BL.append` unpackDrawnMap dm schemeParams :: [(B.ByteString, Int)] schemeParams = [ ("e$damagepct", 1) , ("e$turntime", 1000) , ("", 0) , ("e$sd_turns", 1) , ("e$casefreq", 1) , ("e$minestime", 1000) , ("e$minesnum", 1) , ("e$minedudpct", 1) , ("e$explosives", 1) , ("e$airmines", 1) , ("e$healthprob", 1) , ("e$hcaseamount", 1) , ("e$waterrise", 1) , ("e$healthdec", 1) , ("e$ropepct", 1) , ("e$getawaytime", 1) , ("e$worldedge", 1) ] gameFlagConsts :: [Word32] gameFlagConsts = [ 0x00001000 , 0x00000010 , 0x00000004 , 0x00000008 , 0x00000020 , 0x00000040 , 0x00000080 , 0x00000100 , 0x00000200 , 0x00000400 , 0x00000800 , 0x00002000 , 0x00004000 , 0x00008000 , 0x00010000 , 0x00020000 , 0x00040000 , 0x00080000 , 0x00100000 , 0x00200000 , 0x00400000 , 0x00800000 , 0x01000000 , 0x02000000 , 0x04000000 ] #endif