engine: server: add rcon_enable cvar to control whether server should accept remote commands

engine/server/server.h

@@ -396,6 +396,7 @@ extern convar_t		sv_maxunlag;
 extern convar_t		sv_unlagpush;
 extern convar_t		sv_unlagsamples;
 extern convar_t		rcon_password;
+extern convar_t		rcon_enable;
 extern convar_t		sv_instancedbaseline;
 extern convar_t		sv_background_freeze;
 extern convar_t		sv_minupdaterate;

engine/server/sv_client.c

@@ -1013,6 +1013,9 @@ void SV_RemoteCommand( netadr_t from, sizebuf_t *msg )
 	char		remaining[1024];
 	int		i;
 
+	if( !rcon_enable.value )
+		return;
+
 	Con_Printf( "Rcon from %s:\n%s\n", NET_AdrToString( from ), MSG_GetData( msg ) + 4 );
 	Log_Printf( "Rcon: \"%s\" from \"%s\"\n", MSG_GetData( msg ) + 4, NET_AdrToString( from ));
 	SV_BeginRedirect( from, RD_PACKET, outputbuf, sizeof( outputbuf ) - 16, SV_FlushRedirect );

engine/server/sv_main.c

@@ -30,6 +30,7 @@ CVAR_DEFINE_AUTO( sv_maxunlag, "0.5", 0, "max latency value which can be interpo
 CVAR_DEFINE_AUTO( sv_unlagpush, "0.0", 0, "interpolation bias for unlag time" );
 CVAR_DEFINE_AUTO( sv_unlagsamples, "1", 0, "max samples to interpolate" );
 CVAR_DEFINE_AUTO( rcon_password, "", 0, "remote connect password" );
+CVAR_DEFINE_AUTO( rcon_enable, "1", 0, "enable rcon" );
 CVAR_DEFINE_AUTO( sv_filterban, "1", 0, "filter banned users" );
 CVAR_DEFINE_AUTO( sv_cheats, "0", FCVAR_SERVER, "allow cheats on server" );
 CVAR_DEFINE_AUTO( sv_instancedbaseline, "1", 0, "allow to use instanced baselines to saves network overhead" );
@@ -909,6 +910,7 @@ void SV_Init( void )
 	Cvar_RegisterVariable( &temp1 );
 
 	Cvar_RegisterVariable( &rcon_password );
+	Cvar_RegisterVariable( &rcon_enable );
 	Cvar_RegisterVariable( &sv_stepsize );
 	Cvar_RegisterVariable( &sv_newunit );
 	Cvar_RegisterVariable( &hostname );