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cuberite-2a/source/Server.cpp

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// ReDucTor is an awesome guy who helped me a lot
#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
#include "Server.h"
#include "ClientHandle.h"
#include "OSSupport/Timer.h"
#include "Mobs/Monster.h"
#include "OSSupport/Socket.h"
#include "Root.h"
#include "World.h"
#include "ChunkDef.h"
#include "PluginManager.h"
#include "GroupManager.h"
#include "ChatColor.h"
#include "Player.h"
#include "Inventory.h"
#include "Item.h"
#include "FurnaceRecipe.h"
#include "Tracer.h"
#include "WebAdmin.h"
#include "Protocol/ProtocolRecognizer.h"
#include "MersenneTwister.h"
#include "../iniFile/iniFile.h"
#include "Vector3f.h"
#include <fstream>
#include <sstream>
#include <iostream>
extern "C" {
#include "zlib.h"
}
// For the "dumpmem" server command:
/// Synchronize this with main.cpp - the leak finder needs initialization before it can be used to dump memory
#define ENABLE_LEAK_FINDER
#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
#pragma warning(push)
#pragma warning(disable:4100)
#include "LeakFinder.h"
#pragma warning(pop)
#endif
typedef std::list< cClientHandle* > ClientList;
struct cServer::sServerState
{
sServerState()
: pTickThread(NULL)
, bStopTickThread(false)
{}
cThread* pTickThread; bool bStopTickThread;
cEvent RestartEvent;
std::string ServerID;
};
void cServer::ClientDestroying(const cClientHandle * a_Client)
{
m_SocketThreads.StopReading(a_Client);
}
void cServer::NotifyClientWrite(const cClientHandle * a_Client)
{
m_NotifyWriteThread.NotifyClientWrite(a_Client);
}
void cServer::WriteToClient(const cClientHandle * a_Client, const AString & a_Data)
{
m_SocketThreads.Write(a_Client, a_Data);
}
void cServer::QueueClientClose(const cClientHandle * a_Client)
{
m_SocketThreads.QueueClose(a_Client);
}
void cServer::RemoveClient(const cClientHandle * a_Client)
{
m_SocketThreads.RemoveClient(a_Client);
}
bool cServer::InitServer(cIniFile & a_SettingsIni)
{
if (m_bIsConnected)
{
LOGERROR("ERROR: Trying to initialize server while server is already running!");
return false;
}
printf("/============================\\\n");
printf("| Custom Minecraft Server |\n");
printf("| Created by Kevin Bansberg |\n");
printf("| A.K.A. FakeTruth |\n");
printf("| Monsters by Alex Sonek |\n");
printf("| A.K.A. Duralex |\n");
printf("| Stuff by Mattes D |\n");
printf("| A.K.A. _Xoft(o) |\n");
printf("\\============================/\n");
printf("More info: WWW.MC-SERVER.ORG\n");
printf(" WWW.AE-C.NET\n");
printf(" WWW.RBTHINKTANK.COM\n");
printf("email: faketruth@gmail.com\n\n");
LOG("Starting up server.");
LOGINFO("Compatible clients: %s", MCS_CLIENT_VERSIONS);
LOGINFO("Compatible protocol versions %s", MCS_PROTOCOL_VERSIONS);
if (cSocket::WSAStartup() != 0) // Only does anything on Windows, but whatever
{
LOGERROR("WSAStartup() != 0");
return false;
}
bool HasAnyPorts = false;
AString Ports = a_SettingsIni.GetValueSet("Server", "Port", "25565");
m_ListenThreadIPv4.SetReuseAddr(true);
if (m_ListenThreadIPv4.Initialize(Ports))
{
HasAnyPorts = true;
}
Ports = a_SettingsIni.GetValueSet("Server", "PortsIPv6", "25565");
m_ListenThreadIPv6.SetReuseAddr(true);
if (m_ListenThreadIPv6.Initialize(Ports))
{
HasAnyPorts = true;
}
if (!HasAnyPorts)
{
LOGERROR("Couldn't open any ports. Aborting the server");
return false;
}
m_RCONServer.Initialize(a_SettingsIni);
m_bIsConnected = true;
m_pState->ServerID = "-";
if (a_SettingsIni.GetValueSetB("Authentication", "Authenticate", true))
{
MTRand mtrand1;
unsigned int r1 = (mtrand1.randInt()%1147483647) + 1000000000;
unsigned int r2 = (mtrand1.randInt()%1147483647) + 1000000000;
std::ostringstream sid;
sid << std::hex << r1;
sid << std::hex << r2;
std::string ServerID = sid.str();
ServerID.resize(16, '0');
m_pState->ServerID = ServerID;
}
m_ClientViewDistance = a_SettingsIni.GetValueSetI("Server", "DefaultViewDistance", cClientHandle::DEFAULT_VIEW_DISTANCE);
if (m_ClientViewDistance < cClientHandle::MIN_VIEW_DISTANCE)
{
m_ClientViewDistance = cClientHandle::MIN_VIEW_DISTANCE;
LOGINFO("Setting default viewdistance to the minimum of %d", m_ClientViewDistance);
}
if (m_ClientViewDistance > cClientHandle::MAX_VIEW_DISTANCE)
{
m_ClientViewDistance = cClientHandle::MAX_VIEW_DISTANCE;
LOGINFO("Setting default viewdistance to the maximum of %d", m_ClientViewDistance);
}
m_NotifyWriteThread.Start(this);
PrepareKeys();
return true;
}
cServer::cServer(void)
: m_pState(new sServerState)
, m_ListenThreadIPv4(*this, cSocket::IPv4, "Client")
, m_ListenThreadIPv6(*this, cSocket::IPv6, "Client")
, m_Millisecondsf(0)
, m_Milliseconds(0)
, m_bIsConnected(false)
, m_bRestarting(false)
, m_RCONServer(*this)
{
}
cServer::~cServer()
{
// TODO: Shut down the server gracefully
m_pState->bStopTickThread = true;
delete m_pState->pTickThread; m_pState->pTickThread = NULL;
delete m_pState;
}
void cServer::PrepareKeys(void)
{
// TODO: Save and load key for persistence across sessions
// But generating the key takes only a moment, do we even need that?
LOG("Generating protocol encryption keypair...");
time_t CurTime = time(NULL);
CryptoPP::RandomPool rng;
rng.Put((const byte *)&CurTime, sizeof(CurTime));
m_PrivateKey.GenerateRandomWithKeySize(rng, 1024);
CryptoPP::RSA::PublicKey pk(m_PrivateKey);
m_PublicKey = pk;
}
void cServer::OnConnectionAccepted(cSocket & a_Socket)
{
if (!a_Socket.IsValid())
{
return;
}
const AString & ClientIP = a_Socket.GetIPString();
if (ClientIP.empty())
{
LOGWARN("cServer: A client connected, but didn't present its IP, disconnecting.");
a_Socket.CloseSocket();
return;
}
LOG("Client \"%s\" connected!", ClientIP.c_str());
cClientHandle * NewHandle = new cClientHandle(&a_Socket, m_ClientViewDistance);
if (!m_SocketThreads.AddClient(a_Socket, NewHandle))
{
// For some reason SocketThreads have rejected the handle, clean it up
LOGERROR("Client \"%s\" cannot be handled, server probably unstable", ClientIP.c_str());
a_Socket.CloseSocket();
delete NewHandle;
return;
}
cCSLock Lock(m_CSClients);
m_Clients.push_back(NewHandle);
}
void cServer::BroadcastChat(const AString & a_Message, const cClientHandle * a_Exclude)
{
cCSLock Lock(m_CSClients);
for (ClientList::iterator itr = m_Clients.begin(); itr != m_Clients.end(); ++itr)
{
if ((*itr == a_Exclude) || !(*itr)->IsLoggedIn())
{
continue;
}
(*itr)->SendChat(a_Message);
}
}
bool cServer::Tick(float a_Dt)
{
m_Millisecondsf += a_Dt;
if (m_Millisecondsf > 1.f)
{
m_Milliseconds += (int)m_Millisecondsf;
m_Millisecondsf = m_Millisecondsf - (int)m_Millisecondsf;
}
cRoot::Get()->TickWorlds(a_Dt); // TODO - Maybe give all worlds their own thread?
cClientHandleList RemoveClients;
{
cCSLock Lock(m_CSClients);
for (cClientHandleList::iterator itr = m_Clients.begin(); itr != m_Clients.end();)
{
if ((*itr)->IsDestroyed())
{
RemoveClients.push_back(*itr); // Remove the client later, when CS is not held, to avoid deadlock ( http://forum.mc-server.org/showthread.php?tid=374 )
itr = m_Clients.erase(itr);
continue;
}
(*itr)->Tick(a_Dt);
++itr;
} // for itr - m_Clients[]
}
for (cClientHandleList::iterator itr = RemoveClients.begin(); itr != RemoveClients.end(); ++itr)
{
delete *itr;
} // for itr - RemoveClients[]
cRoot::Get()->GetPluginManager()->Tick(a_Dt);
if (!m_bRestarting)
{
return true;
}
else
{
m_bRestarting = false;
m_pState->RestartEvent.Set();
return false;
}
}
void ServerTickThread( void * a_Param )
{
LOG("ServerTickThread");
cServer *CServerObj = (cServer*)a_Param;
cTimer Timer;
long long msPerTick = 50; // TODO - Put this in server config file
long long LastTime = Timer.GetNowTime();
bool bKeepGoing = true;
while( bKeepGoing )
{
long long NowTime = Timer.GetNowTime();
float DeltaTime = (float)(NowTime-LastTime);
bKeepGoing = CServerObj->Tick( DeltaTime );
long long TickTime = Timer.GetNowTime() - NowTime;
if( TickTime < msPerTick ) // Stretch tick time until it's at least msPerTick
{
cSleep::MilliSleep( (unsigned int)( msPerTick - TickTime ) );
}
LastTime = NowTime;
}
LOG("TICK THREAD STOPPED");
}
bool cServer::Start(void)
{
m_pState->pTickThread = new cThread( ServerTickThread, this, "cServer::ServerTickThread" );
if (!m_ListenThreadIPv4.Start())
{
return false;
}
if (!m_ListenThreadIPv6.Start())
{
return false;
}
m_pState->pTickThread->Start( true );
return true;
}
bool cServer::Command(cClientHandle & a_Client, AString & a_Cmd)
{
return cRoot::Get()->GetPluginManager()->CallHookChat(a_Client.GetPlayer(), a_Cmd);
}
void cServer::ExecuteConsoleCommand(const AString & a_Cmd)
{
AStringVector split = StringSplit(a_Cmd, " ");
if (split.empty())
{
return;
}
// Special handling: "stop" and "restart" are built in
if ((split[0].compare("stop") == 0) || (split[0].compare("restart") == 0))
{
return;
}
// There is currently no way a plugin can do these (and probably won't ever be):
if (split[0].compare("chunkstats") == 0)
{
cRoot::Get()->LogChunkStats();
return;
}
#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
if (split[0].compare("dumpmem") == 0)
{
LeakFinderXmlOutput Output("memdump.xml");
DumpUsedMemory(&Output);
return;
}
if (split[0].compare("killmem") == 0)
{
while (true)
{
new char[100 * 1024 * 1024]; // Allocate and leak 100 MiB in a loop -> fill memory and kill MCS
}
}
#endif
if (cPluginManager::Get()->ExecuteConsoleCommand(split))
{
return;
}
LOG("Unknown command, type 'help' for all commands.\n");
}
void cServer::BindBuiltInConsoleCommands(void)
{
cPluginManager * PlgMgr = cPluginManager::Get();
PlgMgr->BindConsoleCommand("restart", NULL, "Restarts the server cleanly");
PlgMgr->BindConsoleCommand("stop", NULL, "Stops the server cleanly");
PlgMgr->BindConsoleCommand("chunkstats", NULL, "Displays detailed chunk memory statistics");
#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
PlgMgr->BindConsoleCommand("dumpmem", NULL, "Dumps all used memory blocks together with their callstacks into memdump.xml");
#endif
}
void cServer::SendMessage(const AString & a_Message, cPlayer * a_Player /* = NULL */, bool a_bExclude /* = false */ )
{
if ((a_Player != NULL) && !a_bExclude)
{
cClientHandle * Client = a_Player->GetClientHandle();
if (Client != NULL)
{
Client->SendChat(a_Message);
}
return;
}
BroadcastChat(a_Message, (a_Player != NULL) ? a_Player->GetClientHandle() : NULL);
}
void cServer::Shutdown()
{
m_ListenThreadIPv4.Stop();
m_ListenThreadIPv6.Stop();
m_bRestarting = true;
m_pState->RestartEvent.Wait();
cRoot::Get()->SaveAllChunks();
cCSLock Lock(m_CSClients);
for( ClientList::iterator itr = m_Clients.begin(); itr != m_Clients.end(); ++itr )
{
(*itr)->Destroy();
delete *itr;
}
m_Clients.clear();
}
const AString & cServer::GetServerID(void) const
{
return m_pState->ServerID;
}
void cServer::KickUser(int a_ClientID, const AString & a_Reason)
{
cCSLock Lock(m_CSClients);
for (ClientList::iterator itr = m_Clients.begin(); itr != m_Clients.end(); ++itr)
{
if ((*itr)->GetUniqueID() == a_ClientID)
{
(*itr)->Kick(a_Reason);
}
} // for itr - m_Clients[]
}
void cServer::AuthenticateUser(int a_ClientID)
{
cCSLock Lock(m_CSClients);
for (ClientList::iterator itr = m_Clients.begin(); itr != m_Clients.end(); ++itr)
{
if ((*itr)->GetUniqueID() == a_ClientID)
{
(*itr)->Authenticate();
}
} // for itr - m_Clients[]
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cServer::cClientPacketThread:
cServer::cNotifyWriteThread::cNotifyWriteThread(void) :
super("ClientPacketThread"),
m_Server(NULL)
{
}
cServer::cNotifyWriteThread::~cNotifyWriteThread()
{
m_ShouldTerminate = true;
m_Event.Set();
Wait();
}
bool cServer::cNotifyWriteThread::Start(cServer * a_Server)
{
m_Server = a_Server;
return super::Start();
}
void cServer::cNotifyWriteThread::Execute(void)
{
cClientHandleList Clients;
while (!m_ShouldTerminate)
{
cCSLock Lock(m_CS);
while (m_Clients.size() == 0)
{
cCSUnlock Unlock(Lock);
m_Event.Wait();
if (m_ShouldTerminate)
{
return;
}
}
// Copy the clients to notify and unlock the CS:
Clients.splice(Clients.begin(), m_Clients);
Lock.Unlock();
for (cClientHandleList::iterator itr = Clients.begin(); itr != Clients.end(); ++itr)
{
m_Server->m_SocketThreads.NotifyWrite(*itr);
} // for itr - Clients[]
Clients.clear();
} // while (!mShouldTerminate)
}
void cServer::cNotifyWriteThread::NotifyClientWrite(const cClientHandle * a_Client)
{
{
cCSLock Lock(m_CS);
m_Clients.remove(const_cast<cClientHandle *>(a_Client)); // Put it there only once
m_Clients.push_back(const_cast<cClientHandle *>(a_Client));
}
m_Event.Set();
}