Remove FindSDL2 find-module, use sdl2-config.cmake instead
This requires SDL >= 2.0.4.
Since <https://bugzilla.libsdl.org/show_bug.cgi?id=2464> was fixed in
SDL 2.0.4, SDL behaves as a CMake "config-file package", even if it was
not itself built using CMake: it installs a sdl2-config.cmake file to
${libdir}/cmake/SDL2, which tells CMake where to find SDL's headers and
library, analogous to a pkg-config .pc file.
As a result, we no longer need to copy/paste a "find-module package"
to be able to find a system copy of SDL >= 2.0.4 with find_package(SDL2).
Find-module packages are now discouraged by the CMake developers, in
favour of having upstream projects behave as config-file packages.
This results in a small API change: FindSDL2 used to set SDL2_INCLUDE_DIR
and SDL2_LIBRARY, but the standard behaviour for config-file packages is
to set <name>_INCLUDE_DIRS and <name>_LIBRARIES. Use the CONFIG keyword
to make sure we search in config-file package mode, and will not find a
FindSDL2.cmake in some other directory that implements the old interface.
In addition to deleting redundant code, this avoids some assumptions in
FindSDL2 about the layout of a SDL installation. The current libsdl2-dev
package in Debian breaks those assumptions; this is considered a bug
and will hopefully be fixed soon, but it illustrates how fragile these
assumptions can be. We can be more robust against different installation
layouts by relying on SDL's own CMake integration.
When linking to a copy of CMake in a non-standard location, users can
now set the SDL2_DIR or CMAKE_PREFIX_PATH environment variable to point
to it; previously, these users would have used the SDL2DIR environment
variable. This continues to be unnecessary if using matching system-wide
installations of CMake and SDL2, for example both from Debian.
{-
* 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 OverloadedStrings, CPP #-}
module HWProtoNEState where
import Control.Monad.Reader
import qualified Data.ByteString.Lazy as BL
import qualified Data.ByteString.Char8 as B
import Data.Digest.Pure.SHA
--------------------------------------
import CoreTypes
import Utils
import RoomsAndClients
import HandlerUtils
handleCmd_NotEntered :: CmdHandler
handleCmd_NotEntered ["NICK", newNick] = do
(ci, irnc) <- ask
let cl = irnc `client` ci
if not . B.null $ nick cl then return [ProtocolError $ loc "Nickname already provided."]
else
if illegalName newNick then return [ByeClient $ loc "Illegal nickname! Nicknames must be between 1-40 characters long, must not have a trailing or leading space and must not have any of these characters: $()*+?[]^{|}"]
else
return $
ModifyClient (\c -> c{nick = newNick}) :
AnswerClients [sendChan cl] ["NICK", newNick] :
[CheckRegistered | clientProto cl /= 0]
handleCmd_NotEntered ["PROTO", protoNum] = do
(ci, irnc) <- ask
let cl = irnc `client` ci
if clientProto cl > 0 then return [ProtocolError $ loc "Protocol already known."]
else
if parsedProto == 0 then return [ProtocolError $ loc "Bad number."]
else
return $
ModifyClient (\c -> c{clientProto = parsedProto}) :
AnswerClients [sendChan cl] ["PROTO", showB parsedProto] :
[CheckRegistered | not . B.null $ nick cl]
where
parsedProto = readInt_ protoNum
handleCmd_NotEntered ["PASSWORD", passwd] = do
(ci, irnc) <- ask
let cl = irnc `client` ci
if clientProto cl < 48 && passwd == webPassword cl then
return $ JoinLobby : [AnswerClients [sendChan cl] ["ADMIN_ACCESS"] | isAdministrator cl]
else
-- String is parsed by frontend, do not localize!
return [ByeClient "Authentication failed"]
handleCmd_NotEntered ["PASSWORD", passwd, clientSalt] = do
(ci, irnc) <- ask
let cl = irnc `client` ci
let clientHash = h [clientSalt, serverSalt cl, webPassword cl, showB $ clientProto cl, "!hedgewars"]
let serverHash = h [serverSalt cl, clientSalt, webPassword cl, showB $ clientProto cl, "!hedgewars"]
if passwd == clientHash then
return [
AnswerClients [sendChan cl] ["SERVER_AUTH", serverHash]
, JoinLobby
]
else
-- String is parsed by frontend, do not localize!
return [ByeClient "Authentication failed"]
where
h = B.pack . showDigest . sha1 . BL.fromChunks
#if defined(OFFICIAL_SERVER)
handleCmd_NotEntered ["CHECKER", protoNum, newNick, password] = do
(ci, irnc) <- ask
let cl = irnc `client` ci
if parsedProto == 0 then return [ProtocolError $ loc "Bad number."]
else
return $ [
ModifyClient (\c -> c{clientProto = parsedProto, nick = newNick, webPassword = password, isChecker = True})
, CheckRegistered]
where
parsedProto = readInt_ protoNum
#endif
handleCmd_NotEntered (s:_) = return [ProtocolError $ "Incorrect command '" `B.append` s `B.append` "' (state: not entered)"]
handleCmd_NotEntered [] = return [ProtocolError "Empty command (state: not entered)"]