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engine: server: implement simple anti-speedhack

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This commit is contained in:
Alibek Omarov 2023-05-17 17:26:10 +03:00
parent 551ea71906
commit 3415185dde
3 changed files with 21 additions and 0 deletions
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6
engine/server/server.h
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@ -80,6 +80,8 @@ extern int SV_UPDATE_BACKUP;
#define FCL_SEND_RESOURCES BIT( 9 )
#define FCL_FORCE_UNMODIFIED BIT( 10 )
#define MAX_CLIENT_IGNORECMDTIME_WARNS 10 // just a random number (for now)
typedef enum
{
ss_dead, // no map loaded
@ -258,6 +260,9 @@ typedef struct sv_client_s
int userid; // identifying number on server
int extensions;
char useragent[MAX_INFO_STRING];
int ignorecmdtime_warns; // how many times client time was faster than server during this session
qboolean ignorecmdtime_warned; // did we warn our server operator in the log for this batch of commands?
} sv_client_t;
/*
@ -443,6 +448,7 @@ extern convar_t coop;
extern convar_t sv_cheats;
extern convar_t public_server;
extern convar_t sv_nat;
extern convar_t sv_speedhack_kick;
extern convar_t *sv_pausable; // allows pause in multiplayer
extern convar_t *sv_check_errors;

3
engine/server/sv_main.c
View File

@ -59,6 +59,7 @@ CVAR_DEFINE_AUTO( sv_log_onefile, "0", FCVAR_ARCHIVE, "logs server information t
CVAR_DEFINE_AUTO( sv_trace_messages, "0", FCVAR_LATCH, "enable server usermessages tracing (good for developers)" );
CVAR_DEFINE_AUTO( sv_master_response_timeout, "4", FCVAR_ARCHIVE, "master server heartbeat response timeout in seconds" );
CVAR_DEFINE_AUTO( sv_autosave, "1", FCVAR_ARCHIVE|FCVAR_SERVER|FCVAR_PRIVILEGED, "enable autosaving" );
CVAR_DEFINE_AUTO( sv_speedhack_kick, "1", FCVAR_ARCHIVE, "enable automatic kicking players who use speedhacks" );
// game-related cvars
CVAR_DEFINE_AUTO( mapcyclefile, "mapcycle.txt", 0, "name of multiplayer map cycle configuration file" );
@ -919,6 +920,8 @@ void SV_Init( void )
Cvar_RegisterVariable( &sv_enttools_enable );
Cvar_RegisterVariable( &sv_enttools_maxfire );
Cvar_RegisterVariable( &sv_speedhack_kick );
sv_allow_joystick = Cvar_Get( "sv_allow_joystick", "1", FCVAR_ARCHIVE, "allow connect with joystick enabled" );
sv_allow_mouse = Cvar_Get( "sv_allow_mouse", "1", FCVAR_ARCHIVE, "allow connect with mouse" );
sv_allow_touch = Cvar_Get( "sv_allow_touch", "1", FCVAR_ARCHIVE, "allow connect with touch controls" );

12
engine/server/sv_pmove.c
View File

@ -911,11 +911,23 @@ void SV_RunCmd( sv_client_t *cl, usercmd_t *ucmd, int random_seed )
if( cl->ignorecmdtime > host.realtime )
{
if( !cl->ignorecmdtime_warned )
{
// report to server op
Con_Reportf( S_WARN "%s time is faster than server time (speed hack?)\n", cl->name );
cl->ignorecmdtime_warned = true;
cl->ignorecmdtime_warns++;
// automatically kick player
if( sv_speedhack_kick.value && cl->ignorecmdtime_warns > MAX_CLIENT_IGNORECMDTIME_WARNS )
SV_KickPlayer( cl, "Speed hacks aren't allowed on this server" );
}
cl->cmdtime += ((double)ucmd->msec / 1000.0 );
return;
}
cl->ignorecmdtime = 0.0;
cl->ignorecmdtime_warned = false;
// chop up very long commands
if( cmd.msec > 50 )