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Fix anticheat

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This commit is contained in:
Perttu Ahola 2013-08-03 23:16:37 +03:00
parent bc5db9b027
commit 742614180c
5 changed files with 146 additions and 70 deletions
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40
src/server.cpp
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@ -1090,6 +1090,16 @@ void Server::AsyncRunStep()
{
JMutexAutoLock lock(m_env_mutex);
// Figure out and report maximum lag to environment
float max_lag = m_env->getMaxLagEstimate();
max_lag *= 0.9998; // Decrease slowly (about half per 5 minutes)
if(dtime > max_lag){
if(dtime > 0.1 && dtime > max_lag * 2.0)
infostream<<"Server: Maximum lag peaked to "<<dtime
<<" s"<<std::endl;
max_lag = dtime;
}
m_env->reportMaxLagEstimate(max_lag);
// Step environment
ScopeProfiler sp(g_profiler, "SEnv step");
ScopeProfiler sp2(g_profiler, "SEnv step avg", SPT_AVG);
@ -2241,6 +2251,8 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
player->control.LMB = (bool)(keyPressed&128);
player->control.RMB = (bool)(keyPressed&256);
playersao->checkMovementCheat();
/*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to "
<<"("<<position.X<<","<<position.Y<<","<<position.Z<<")"
<<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/
@ -2953,13 +2965,27 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
<<std::endl;
is_valid_dig = false;
}
// If time is considerably too short, ignore dig
// Check time only for medium and slow timed digs
if(params.diggable && params.time > 0.3 && nocheat_t < 0.5 * params.time){
// Check digging time
// If already invalidated, we don't have to
if(!is_valid_dig){
// Well not our problem then
}
// Clean and long dig
else if(params.time > 2.0 && nocheat_t * 1.2 > params.time){
// All is good, but grab time from pool; don't care if
// it's actually available
playersao->getDigPool().grab(params.time);
}
// Short or laggy dig
// Try getting the time from pool
else if(playersao->getDigPool().grab(params.time)){
// All is good
}
// Dig not possible
else{
infostream<<"Server: NoCheat: "<<player->getName()
<<" completed digging "
<<PP(p_under)<<" in "<<nocheat_t<<"s; expected "
<<params.time<<"s; not digging."<<std::endl;
<<" completed digging "<<PP(p_under)
<<"too fast; not digging."<<std::endl;
is_valid_dig = false;
}
}
@ -4617,6 +4643,8 @@ std::wstring Server::getStatusString()
os<<L"version="<<narrow_to_wide(VERSION_STRING);
// Uptime
os<<L", uptime="<<m_uptime.get();
// Max lag estimate
os<<L", max_lag="<<m_env->getMaxLagEstimate();
// Information about clients
std::map<u16, RemoteClient*>::iterator i;
bool first;