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authorTiger Wang <ziwei.tiger@outlook.com>2017-07-28 18:54:40 +0200
committerGitHub <noreply@github.com>2017-07-28 18:54:40 +0200
commiteb4432bb6260eaadb41495149739244308e9e125 (patch)
tree8f1787586d23194ef5f4d7af8a4454f0ea9e179a
parentHandle incomplete packets in cProtocolRecognizer (diff)
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Diffstat (limited to '')
-rw-r--r--src/ClientHandle.cpp22
-rw-r--r--src/Entities/Player.cpp5
-rw-r--r--src/FastRandom.h3
-rw-r--r--src/Globals.h4
-rw-r--r--src/Protocol/ProtocolRecognizer.cpp4
-rw-r--r--src/Protocol/Protocol_1_10.cpp4
-rw-r--r--src/Protocol/Protocol_1_11.cpp8
-rw-r--r--src/Protocol/Protocol_1_12.cpp6
-rw-r--r--src/Protocol/Protocol_1_8.cpp6
-rw-r--r--src/Protocol/Protocol_1_9.cpp20
-rw-r--r--src/Server.cpp48
-rw-r--r--src/Server.h26
12 files changed, 61 insertions, 95 deletions
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index 1b63153d2..3270cc37f 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -179,6 +179,9 @@ void cClientHandle::Destroy(void)
if (player != nullptr)
{
+ // Atomically decrement player count (in world or server thread)
+ cRoot::Get()->GetServer()->PlayerDestroyed();
+
auto world = player->GetWorld();
if (world != nullptr)
{
@@ -322,6 +325,9 @@ void cClientHandle::Kick(const AString & a_Reason)
void cClientHandle::Authenticate(const AString & a_Name, const AString & a_UUID, const Json::Value & a_Properties)
{
+ // Atomically increment player count (in server thread)
+ cRoot::Get()->GetServer()->PlayerCreated();
+
cWorld * World;
{
cCSLock lock(m_CSState);
@@ -662,11 +668,14 @@ void cClientHandle::HandleNPCTrade(int a_SlotNum)
void cClientHandle::HandlePing(void)
{
+ /* TODO: unused function, handles Legacy Server List Ping
+ http://wiki.vg/Protocol#Legacy_Server_List_Ping suggests that servers SHOULD handle this packet */
+
// Somebody tries to retrieve information about the server
AString Reply;
const cServer & Server = *cRoot::Get()->GetServer();
- Printf(Reply, "%s%s%i%s%i",
+ Printf(Reply, "%s%s" SIZE_T_FMT "%s" SIZE_T_FMT,
Server.GetDescription().c_str(),
cChatColor::Delimiter,
Server.GetNumPlayers(),
@@ -1860,17 +1869,14 @@ bool cClientHandle::HandleHandshake(const AString & a_Username)
{
if (a_Username.length() > 16)
{
- Kick("Your username is too long(>16 characters)");
+ Kick("Your username is too long (>16 characters)");
return false;
}
- if (!cRoot::Get()->GetPluginManager()->CallHookHandshake(*this, a_Username))
+ if (cRoot::Get()->GetPluginManager()->CallHookHandshake(*this, a_Username))
{
- if (cRoot::Get()->GetServer()->GetNumPlayers() >= cRoot::Get()->GetServer()->GetMaxPlayers())
- {
- Kick("The server is currently full :(-- Try again later");
- return false;
- }
+ Kick("Entry denied by plugin");
+ return false;
}
return CheckMultiLogin(a_Username);
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index 77ce378da..afeb8fa04 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -146,8 +146,6 @@ cPlayer::cPlayer(cClientHandlePtr a_Client, const AString & a_PlayerName) :
m_IsFlying = true;
m_bVisible = false;
}
-
- cRoot::Get()->GetServer()->PlayerCreated(this);
}
@@ -183,9 +181,6 @@ cPlayer::~cPlayer(void)
LOGD("Deleting cPlayer \"%s\" at %p, ID %d", GetName().c_str(), static_cast<void *>(this), GetUniqueID());
- // Notify the server that the player is being destroyed
- cRoot::Get()->GetServer()->PlayerDestroying(this);
-
SaveToDisk();
m_ClientHandle = nullptr;
diff --git a/src/FastRandom.h b/src/FastRandom.h
index 7c3048118..7ae5949d4 100644
--- a/src/FastRandom.h
+++ b/src/FastRandom.h
@@ -15,9 +15,6 @@ prefer calls to GetRandomProvider over creating new instances.
#pragma once
-#include <random>
-#include <type_traits>
-#include <limits>
diff --git a/src/Globals.h b/src/Globals.h
index a48b48d9c..854ddcc62 100644
--- a/src/Globals.h
+++ b/src/Globals.h
@@ -251,7 +251,9 @@ template class SizeChecker<UInt8, 1>;
#include <set>
#include <queue>
#include <limits>
-#include <chrono>
+#include <random>
+#include <type_traits>
+#include <atomic>
diff --git a/src/Protocol/ProtocolRecognizer.cpp b/src/Protocol/ProtocolRecognizer.cpp
index 187a73a6e..43facde72 100644
--- a/src/Protocol/ProtocolRecognizer.cpp
+++ b/src/Protocol/ProtocolRecognizer.cpp
@@ -1157,8 +1157,8 @@ void cProtocolRecognizer::HandlePacketStatusRequest(void)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
diff --git a/src/Protocol/Protocol_1_10.cpp b/src/Protocol/Protocol_1_10.cpp
index 16c1b3277..bc6b89635 100644
--- a/src/Protocol/Protocol_1_10.cpp
+++ b/src/Protocol/Protocol_1_10.cpp
@@ -321,8 +321,8 @@ void cProtocol_1_10_0::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
diff --git a/src/Protocol/Protocol_1_11.cpp b/src/Protocol/Protocol_1_11.cpp
index 3376e8f88..4a4006390 100644
--- a/src/Protocol/Protocol_1_11.cpp
+++ b/src/Protocol/Protocol_1_11.cpp
@@ -561,8 +561,8 @@ void cProtocol_1_11_0::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
@@ -1184,8 +1184,8 @@ void cProtocol_1_11_1::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
diff --git a/src/Protocol/Protocol_1_12.cpp b/src/Protocol/Protocol_1_12.cpp
index a25ac1c0d..278c063cc 100644
--- a/src/Protocol/Protocol_1_12.cpp
+++ b/src/Protocol/Protocol_1_12.cpp
@@ -374,8 +374,8 @@ void cProtocol_1_12::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
@@ -1262,7 +1262,7 @@ void cProtocol_1_12::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
Pkt.WriteBEUInt8(static_cast<UInt8>(a_Player.GetEffectiveGameMode()) | (Server->IsHardcore() ? 0x08 : 0)); // Hardcore flag bit 4
Pkt.WriteBEInt32(static_cast<Int32>(a_World.GetDimension()));
Pkt.WriteBEUInt8(2); // TODO: Difficulty (set to Normal)
- Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<int>(Server->GetMaxPlayers(), 0, 255)));
+ Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<size_t>(Server->GetMaxPlayers(), 0, 255)));
Pkt.WriteString("default"); // Level type - wtf?
Pkt.WriteBool(false); // Reduced Debug Info - wtf?
}
diff --git a/src/Protocol/Protocol_1_8.cpp b/src/Protocol/Protocol_1_8.cpp
index aa5af83e1..895dde3ed 100644
--- a/src/Protocol/Protocol_1_8.cpp
+++ b/src/Protocol/Protocol_1_8.cpp
@@ -639,7 +639,7 @@ void cProtocol_1_8_0::SendLogin(const cPlayer & a_Player, const cWorld & a_World
Pkt.WriteBEUInt8(static_cast<UInt8>(a_Player.GetEffectiveGameMode()) | (Server->IsHardcore() ? 0x08 : 0)); // Hardcore flag bit 4
Pkt.WriteBEInt8(static_cast<Int8>(a_World.GetDimension()));
Pkt.WriteBEUInt8(2); // TODO: Difficulty (set to Normal)
- Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<int>(Server->GetMaxPlayers(), 0, 255)));
+ Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<size_t>(Server->GetMaxPlayers(), 0, 255)));
Pkt.WriteString("default"); // Level type - wtf?
Pkt.WriteBool(false); // Reduced Debug Info - wtf?
}
@@ -2110,8 +2110,8 @@ void cProtocol_1_8_0::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
diff --git a/src/Protocol/Protocol_1_9.cpp b/src/Protocol/Protocol_1_9.cpp
index 665a1f457..3b47e2b8a 100644
--- a/src/Protocol/Protocol_1_9.cpp
+++ b/src/Protocol/Protocol_1_9.cpp
@@ -656,7 +656,7 @@ void cProtocol_1_9_0::SendLogin(const cPlayer & a_Player, const cWorld & a_World
Pkt.WriteBEUInt8(static_cast<UInt8>(a_Player.GetEffectiveGameMode()) | (Server->IsHardcore() ? 0x08 : 0)); // Hardcore flag bit 4
Pkt.WriteBEInt8(static_cast<Int8>(a_World.GetDimension()));
Pkt.WriteBEUInt8(2); // TODO: Difficulty (set to Normal)
- Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<int>(Server->GetMaxPlayers(), 0, 255)));
+ Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<size_t>(Server->GetMaxPlayers(), 0, 255)));
Pkt.WriteString("default"); // Level type - wtf?
Pkt.WriteBool(false); // Reduced Debug Info - wtf?
}
@@ -2135,8 +2135,8 @@ void cProtocol_1_9_0::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
@@ -4110,7 +4110,7 @@ void cProtocol_1_9_1::SendLogin(const cPlayer & a_Player, const cWorld & a_World
Pkt.WriteBEUInt8(static_cast<UInt8>(a_Player.GetEffectiveGameMode()) | (Server->IsHardcore() ? 0x08 : 0)); // Hardcore flag bit 4
Pkt.WriteBEInt32(static_cast<Int32>(a_World.GetDimension()));
Pkt.WriteBEUInt8(2); // TODO: Difficulty (set to Normal)
- Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<int>(Server->GetMaxPlayers(), 0, 255)));
+ Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<size_t>(Server->GetMaxPlayers(), 0, 255)));
Pkt.WriteString("default"); // Level type - wtf?
Pkt.WriteBool(false); // Reduced Debug Info - wtf?
}
@@ -4139,8 +4139,8 @@ void cProtocol_1_9_1::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
@@ -4196,8 +4196,8 @@ void cProtocol_1_9_2::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
@@ -4253,8 +4253,8 @@ void cProtocol_1_9_4::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
cServer * Server = cRoot::Get()->GetServer();
AString ServerDescription = Server->GetDescription();
- int NumPlayers = Server->GetNumPlayers();
- int MaxPlayers = Server->GetMaxPlayers();
+ auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
+ auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
AString Favicon = Server->GetFaviconData();
cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);
diff --git a/src/Server.cpp b/src/Server.cpp
index fd707e61a..947852775 100644
--- a/src/Server.cpp
+++ b/src/Server.cpp
@@ -118,7 +118,6 @@ void cServer::cTickThread::Execute(void)
cServer::cServer(void) :
m_PlayerCount(0),
- m_PlayerCountDiff(0),
m_ClientViewDistance(0),
m_bIsConnected(false),
m_bRestarting(false),
@@ -148,24 +147,18 @@ void cServer::ClientMovedToWorld(const cClientHandle * a_Client)
-void cServer::PlayerCreated(const cPlayer * a_Player)
+void cServer::PlayerCreated()
{
- UNUSED(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;
+ m_PlayerCount++;
}
-void cServer::PlayerDestroying(const cPlayer * a_Player)
+void cServer::PlayerDestroyed()
{
- UNUSED(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;
+ m_PlayerCount--;
}
@@ -176,11 +169,9 @@ bool cServer::InitServer(cSettingsRepositoryInterface & a_Settings, bool a_Shoul
{
m_Description = a_Settings.GetValueSet("Server", "Description", "Cuberite - in C++!");
m_ShutdownMessage = a_Settings.GetValueSet("Server", "ShutdownMessage", "Server shutdown");
- m_MaxPlayers = a_Settings.GetValueSetI("Server", "MaxPlayers", 100);
+ m_MaxPlayers = static_cast<size_t>(a_Settings.GetValueSetI("Server", "MaxPlayers", 100));
m_bIsHardcore = a_Settings.GetValueSetB("Server", "HardcoreEnabled", false);
m_bAllowMultiLogin = a_Settings.GetValueSetB("Server", "AllowMultiLogin", false);
- m_PlayerCount = 0;
- m_PlayerCountDiff = 0;
m_FaviconData = Base64Encode(cFile::ReadWholeFile(FILE_IO_PREFIX + AString("favicon.png"))); // Will return empty string if file nonexistant; client doesn't mind
@@ -246,16 +237,6 @@ bool cServer::InitServer(cSettingsRepositoryInterface & a_Settings, bool a_Shoul
-int cServer::GetNumPlayers(void) const
-{
- cCSLock Lock(m_CSPlayerCount);
- return m_PlayerCount;
-}
-
-
-
-
-
bool cServer::IsPlayerInQueue(AString a_Username)
{
cCSLock Lock(m_CSClients);
@@ -300,17 +281,6 @@ cTCPLink::cCallbacksPtr cServer::OnConnectionAccepted(const AString & a_RemoteIP
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);
@@ -657,6 +627,14 @@ void cServer::KickUser(int a_ClientID, const AString & a_Reason)
void cServer::AuthenticateUser(int a_ClientID, const AString & a_Name, const AString & a_UUID, const Json::Value & a_Properties)
{
cCSLock Lock(m_CSClients);
+
+ // Check max players condition within lock (expect server and authenticator thread to both call here)
+ if (GetNumPlayers() >= GetMaxPlayers())
+ {
+ KickUser(a_ClientID, "The server is currently full :(" "\n" "Try again later?");
+ return;
+ }
+
for (auto itr = m_Clients.begin(); itr != m_Clients.end(); ++itr)
{
if ((*itr)->GetUniqueID() == a_ClientID)
diff --git a/src/Server.h b/src/Server.h
index 68741b144..88f91120c 100644
--- a/src/Server.h
+++ b/src/Server.h
@@ -67,9 +67,9 @@ public:
const AString & GetShutdownMessage(void) const { return m_ShutdownMessage; }
// Player counts:
- int GetMaxPlayers(void) const { return m_MaxPlayers; }
- int GetNumPlayers(void) const;
- void SetMaxPlayers(int a_MaxPlayers) { m_MaxPlayers = a_MaxPlayers; }
+ size_t GetMaxPlayers(void) const { return m_MaxPlayers; }
+ size_t GetNumPlayers(void) const { return m_PlayerCount; }
+ void SetMaxPlayers(size_t a_MaxPlayers) { m_MaxPlayers = a_MaxPlayers; }
/** Check if the player is queued to be transferred to a World.
Returns true is Player is found in queue. */
@@ -106,17 +106,14 @@ public:
const AString & GetServerID(void) const { return m_ServerID; } // tolua_export
- /** Called by cClientHandle's destructor; stop m_SocketThreads from calling back into a_Client */
- void ClientDestroying(const cClientHandle * a_Client);
-
/** Don't tick a_Client anymore, it will be ticked from its cPlayer instead */
void ClientMovedToWorld(const cClientHandle * a_Client);
/** Notifies the server that a player was created; the server uses this to adjust the number of players */
- void PlayerCreated(const cPlayer * a_Player);
+ void PlayerCreated();
/** Notifies the server that a player is being destroyed; the server uses this to adjust the number of players */
- void PlayerDestroying(const cPlayer * a_Player);
+ void PlayerDestroyed();
/** Returns base64 encoded favicon data (obtained from favicon.png) */
const AString & GetFaviconData(void) const { return m_FaviconData; }
@@ -182,17 +179,8 @@ private:
/** Clients that have just been moved into a world and are to be removed from m_Clients in the next Tick(). */
cClientHandles m_ClientsToRemove;
- /** Protects m_PlayerCount against multithreaded access. */
- mutable cCriticalSection m_CSPlayerCount;
-
/** Number of players currently playing in the server. */
- int m_PlayerCount;
-
- /** Protects m_PlayerCountDiff against multithreaded access. */
- cCriticalSection m_CSPlayerCountDiff;
-
- /** Adjustment to m_PlayerCount to be applied in the Tick thread. */
- int m_PlayerCountDiff;
+ std::atomic_size_t m_PlayerCount;
int m_ClientViewDistance; // The default view distance for clients; settable in Settings.ini
@@ -211,7 +199,7 @@ private:
AString m_Description;
AString m_ShutdownMessage;
AString m_FaviconData;
- int m_MaxPlayers;
+ size_t m_MaxPlayers;
bool m_bIsHardcore;
/** True - allow same username to login more than once False - only once */