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game: Limit broadcasting to the allowed commands.

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Commands that can broadcast are 0101 0102 0104 0107 010f 0503 050f 0514.
This commit is contained in:
Loïc Hoguin 2010-05-25 23:09:08 +02:00
parent dd4bb5f520
commit d575eae402
1 changed files with 15 additions and 6 deletions
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21
src/egs_game.erl
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@ -350,26 +350,35 @@ dispatch(CSocket, GID, Version, Packet) ->
<< _:32, Command:16/unsigned-integer, Channel:8/little-unsigned-integer, _/bits >> = Packet, << _:32, Command:16/unsigned-integer, Channel:8/little-unsigned-integer, _/bits >> = Packet,
case Channel of case Channel of
1 -> 1 ->
broadcast(Command, CSocket, GID, Version, Packet); broadcast(Command, GID, Packet);
_ -> _ ->
handle(Command, CSocket, GID, Version, Packet) handle(Command, CSocket, GID, Version, Packet)
end. end.
%% @doc Position change broadcast handler. Save the position and then dispatch it. %% @doc Position change broadcast handler. Save the position and then dispatch it.
broadcast(16#0503, _, GID, _, Packet) -> broadcast(16#0503, GID, Packet) ->
<< _:448, Coords:96/bits, _:96, Quest:32/little-unsigned-integer, MapType:32/little-unsigned-integer, << _:448, Coords:96/bits, _:96, Quest:32/little-unsigned-integer, MapType:32/little-unsigned-integer,
MapNumber:32/little-unsigned-integer, MapEntry:32/little-unsigned-integer, _/bits >> = Packet, MapNumber:32/little-unsigned-integer, MapEntry:32/little-unsigned-integer, _/bits >> = Packet,
User = egs_db:users_select(GID), User = egs_db:users_select(GID),
NewUser = User#users{coords=Coords, quest=Quest, maptype=MapType, mapnumber=MapNumber, mapentry=MapEntry}, NewUser = User#users{coords=Coords, quest=Quest, maptype=MapType, mapnumber=MapNumber, mapentry=MapEntry},
egs_db:users_insert(NewUser), egs_db:users_insert(NewUser),
broadcast(default, ignore, GID, ignore, Packet); broadcast(default, GID, Packet);
%% @doc Default broadcast handler. Dispatch the packet to everyone (for now). %% @doc Default broadcast handler. Dispatch the command to everyone.
%% We clean up the packet and use the real GID and LID of the user, disregarding what was sent and possibly tampered with. %% We clean up the command and use the real GID and LID of the user, disregarding what was sent and possibly tampered with.
%% Only a handful of commands are allowed to broadcast. An user tampering with it would gets disconnected instantly.
%% @todo Don't query the user data everytime! Keep an User instead of a GID probably. %% @todo Don't query the user data everytime! Keep an User instead of a GID probably.
broadcast(_, _, GID, _, Packet) -> broadcast(Command, GID, Packet)
when Command =:= 16#0101;
Command =:= 16#0102;
Command =:= 16#0104;
Command =:= 16#0107;
Command =:= 16#010f;
Command =:= 16#050f;
Command =:= 16#0514;
Command =:= default ->
<< _:32, A:64/bits, _:64, B:192/bits, _:64, C/bits >> = Packet, << _:32, A:64/bits, _:64, B:192/bits, _:64, C/bits >> = Packet,
case egs_db:users_select(GID) of case egs_db:users_select(GID) of
error -> error ->