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authorAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
committerAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
commit675b4aa878f16291ce33fced48a2bc7425f635ae (patch)
tree409914df27a98f65adf866da669429c4de141b6f /src/Server.cpp
parentLineBlockTracer: Using the coord-based block faces. (diff)
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Diffstat (limited to 'src/Server.cpp')
-rw-r--r--src/Server.cpp707
1 files changed, 707 insertions, 0 deletions
diff --git a/src/Server.cpp b/src/Server.cpp
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index 000000000..fe8076631
--- /dev/null
+++ b/src/Server.cpp
@@ -0,0 +1,707 @@
+// 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 "Entities/Player.h"
+#include "Inventory.h"
+#include "Item.h"
+#include "FurnaceRecipe.h"
+#include "WebAdmin.h"
+#include "Protocol/ProtocolRecognizer.h"
+#include "CommandOutput.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;
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cServer::cTickThread:
+
+cServer::cTickThread::cTickThread(cServer & a_Server) :
+ super("ServerTickThread"),
+ m_Server(a_Server)
+{
+}
+
+
+
+
+
+void cServer::cTickThread::Execute(void)
+{
+ cTimer Timer;
+
+ long long msPerTick = 50;
+ long long LastTime = Timer.GetNowTime();
+
+ while (!m_ShouldTerminate)
+ {
+ long long NowTime = Timer.GetNowTime();
+ float DeltaTime = (float)(NowTime-LastTime);
+ m_ShouldTerminate = !m_Server.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;
+ }
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cServer:
+
+cServer::cServer(void) :
+ m_ListenThreadIPv4(*this, cSocket::IPv4, "Client IPv4"),
+ m_ListenThreadIPv6(*this, cSocket::IPv6, "Client IPv6"),
+ m_bIsConnected(false),
+ m_bRestarting(false),
+ m_RCONServer(*this),
+ m_TickThread(*this)
+{
+}
+
+
+
+
+
+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);
+}
+
+
+
+
+
+void cServer::ClientMovedToWorld(const cClientHandle * a_Client)
+{
+ cCSLock Lock(m_CSClients);
+ m_ClientsToRemove.push_back(const_cast<cClientHandle *>(a_Client));
+}
+
+
+
+
+
+void cServer::PlayerCreated(const cPlayer * a_Player)
+{
+ // To avoid deadlocks, the player count is not handled directly, but rather posted onto the tick thread
+ cCSLock Lock(m_CSPlayerCountDiff);
+ m_PlayerCountDiff += 1;
+}
+
+
+
+
+
+void cServer::PlayerDestroying(const cPlayer * a_Player)
+{
+ // To avoid deadlocks, the player count is not handled directly, but rather posted onto the tick thread
+ cCSLock Lock(m_CSPlayerCountDiff);
+ m_PlayerCountDiff -= 1;
+}
+
+
+
+
+
+bool cServer::InitServer(cIniFile & a_SettingsIni)
+{
+ m_Description = a_SettingsIni.GetValueSet("Server", "Description", "MCServer - in C++!").c_str();
+ m_MaxPlayers = a_SettingsIni.GetValueSetI("Server", "MaxPlayers", 100);
+ m_bIsHardcore = a_SettingsIni.GetValueSetB("Server", "HardcoreEnabled", false);
+ m_PlayerCount = 0;
+ m_PlayerCountDiff = 0;
+
+ if (m_bIsConnected)
+ {
+ LOGERROR("ERROR: Trying to initialize server while server is already running!");
+ return false;
+ }
+
+ 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_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;
+ m_ServerID = sid.str();
+ m_ServerID.resize(16, '0');
+ }
+
+ 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;
+}
+
+
+
+
+
+int cServer::GetNumPlayers(void)
+{
+ cCSLock Lock(m_CSPlayerCount);
+ return m_PlayerCount;
+}
+
+
+
+
+
+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?
+
+ LOGD("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;
+ }
+
+ LOGD("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);
+}
+
+
+
+
+
+bool cServer::Tick(float a_Dt)
+{
+ // Apply the queued playercount adjustments (postponed to avoid deadlocks)
+ int PlayerCountDiff = 0;
+ {
+ cCSLock Lock(m_CSPlayerCountDiff);
+ std::swap(PlayerCountDiff, m_PlayerCountDiff);
+ }
+ {
+ cCSLock Lock(m_CSPlayerCount);
+ m_PlayerCount += PlayerCountDiff;
+ }
+
+ // Send the tick to the plugins, as well as let the plugin manager reload, if asked to (issue #102):
+ cPluginManager::Get()->Tick(a_Dt);
+
+ // Let the Root process all the queued commands:
+ cRoot::Get()->TickCommands();
+
+ // Tick all clients not yet assigned to a world:
+ TickClients(a_Dt);
+
+ if (!m_bRestarting)
+ {
+ return true;
+ }
+ else
+ {
+ m_bRestarting = false;
+ m_RestartEvent.Set();
+ return false;
+ }
+}
+
+
+
+
+
+void cServer::TickClients(float a_Dt)
+{
+ cClientHandleList RemoveClients;
+ {
+ cCSLock Lock(m_CSClients);
+
+ // Remove clients that have moved to a world (the world will be ticking them from now on)
+ for (cClientHandleList::const_iterator itr = m_ClientsToRemove.begin(), end = m_ClientsToRemove.end(); itr != end; ++itr)
+ {
+ m_Clients.remove(*itr);
+ } // for itr - m_ClientsToRemove[]
+ m_ClientsToRemove.clear();
+
+ // Tick the remaining clients, take out those that have been destroyed into RemoveClients
+ for (cClientHandleList::iterator itr = m_Clients.begin(); itr != m_Clients.end();)
+ {
+ if ((*itr)->IsDestroyed())
+ {
+ // Remove the client later, when CS is not held, to avoid deadlock ( http://forum.mc-server.org/showthread.php?tid=374 )
+ RemoveClients.push_back(*itr);
+ itr = m_Clients.erase(itr);
+ continue;
+ }
+ (*itr)->Tick(a_Dt);
+ ++itr;
+ } // for itr - m_Clients[]
+ }
+
+ // Delete the clients that have been destroyed
+ for (cClientHandleList::iterator itr = RemoveClients.begin(); itr != RemoveClients.end(); ++itr)
+ {
+ delete *itr;
+ } // for itr - RemoveClients[]
+}
+
+
+
+
+
+bool cServer::Start(void)
+{
+ if (!m_ListenThreadIPv4.Start())
+ {
+ return false;
+ }
+ if (!m_ListenThreadIPv6.Start())
+ {
+ return false;
+ }
+ if (!m_TickThread.Start())
+ {
+ return false;
+ }
+ 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, cCommandOutputCallback & a_Output)
+{
+ 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;
+ }
+
+ // "help" and "reload" are to be handled by MCS, so that they work no matter what
+ if (split[0] == "help")
+ {
+ PrintHelp(split, a_Output);
+ return;
+ }
+ if (split[0] == "reload")
+ {
+ cPluginManager::Get()->ReloadPlugins();
+ 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(a_Output);
+ a_Output.Finished();
+ 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, a_Output))
+ {
+ a_Output.Finished();
+ return;
+ }
+
+ a_Output.Out("Unknown command, type 'help' for all commands.");
+ a_Output.Finished();
+}
+
+
+
+
+
+void cServer::PrintHelp(const AStringVector & a_Split, cCommandOutputCallback & a_Output)
+{
+ typedef std::pair<AString, AString> AStringPair;
+ typedef std::vector<AStringPair> AStringPairs;
+
+ class cCallback :
+ public cPluginManager::cCommandEnumCallback
+ {
+ public:
+ cCallback(void) : m_MaxLen(0) {}
+
+ virtual bool Command(const AString & a_Command, const cPlugin * a_Plugin, const AString & a_Permission, const AString & a_HelpString) override
+ {
+ if (!a_HelpString.empty())
+ {
+ m_Commands.push_back(AStringPair(a_Command, a_HelpString));
+ if (m_MaxLen < a_Command.length())
+ {
+ m_MaxLen = a_Command.length();
+ }
+ }
+ return false;
+ }
+
+ AStringPairs m_Commands;
+ size_t m_MaxLen;
+ } Callback;
+ cPluginManager::Get()->ForEachConsoleCommand(Callback);
+ std::sort(Callback.m_Commands.begin(), Callback.m_Commands.end());
+ for (AStringPairs::const_iterator itr = Callback.m_Commands.begin(), end = Callback.m_Commands.end(); itr != end; ++itr)
+ {
+ const AStringPair & cmd = *itr;
+ a_Output.Out(Printf("%-*s%s\n", Callback.m_MaxLen, cmd.first.c_str(), cmd.second.c_str()));
+ } // for itr - Callback.m_Commands[]
+ a_Output.Finished();
+}
+
+
+
+
+
+void cServer::BindBuiltInConsoleCommands(void)
+{
+ cPluginManager * PlgMgr = cPluginManager::Get();
+ PlgMgr->BindConsoleCommand("help", NULL, " - Shows the available commands");
+ PlgMgr->BindConsoleCommand("reload", NULL, " - Reloads all plugins");
+ 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::Shutdown(void)
+{
+ m_ListenThreadIPv4.Stop();
+ m_ListenThreadIPv6.Stop();
+
+ m_bRestarting = true;
+ m_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();
+}
+
+
+
+
+
+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();
+ return;
+ }
+ } // for itr - m_Clients[]
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cServer::cNotifyWriteThread:
+
+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();
+}
+
+
+
+