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-rw-r--r--source/cClientHandle.cpp17
-rw-r--r--source/cServer.cpp2
-rw-r--r--source/cSocketThreads.cpp209
-rw-r--r--source/cSocketThreads.h23
4 files changed, 218 insertions, 33 deletions
diff --git a/source/cClientHandle.cpp b/source/cClientHandle.cpp
index 78032611e..9eed31a3a 100644
--- a/source/cClientHandle.cpp
+++ b/source/cClientHandle.cpp
@@ -151,7 +151,7 @@ cClientHandle::~cClientHandle()
{
LOG("Deleting client \"%s\"", GetUsername().c_str());
- // Remove from cSocketThreads, just in case
+ // Remove from cSocketThreads, we're not to be called anymore:
cRoot::Get()->GetServer()->ClientDestroying(this);
m_LoadedChunks.clear();
@@ -225,14 +225,6 @@ void cClientHandle::Destroy()
{
RemoveFromAllChunks();
}
-
- if (m_Socket.IsValid())
- {
- m_Socket.CloseSocket();
- }
-
- // Synchronize with the cSocketThreads (so that they don't call us anymore)
- cRoot::Get()->GetServer()->ClientDestroying(this);
}
@@ -489,6 +481,7 @@ void cClientHandle::HandlePacket(cPacket * a_Packet)
// Ignored packets:
case E_PLAYERLOOK:
+ case E_CHAT:
case E_PLAYERMOVELOOK:
case E_PLAYERPOS:
case E_KEEP_ALIVE: break;
@@ -504,6 +497,8 @@ void cClientHandle::HandlePacket(cPacket * a_Packet)
{
// Ignored packets:
case E_KEEP_ALIVE:
+ case E_CHAT:
+ case E_FLYING:
case E_PLAYERLOOK:
case E_PLAYERMOVELOOK:
case E_PLAYERPOS: break;
@@ -520,6 +515,8 @@ void cClientHandle::HandlePacket(cPacket * a_Packet)
{
// Ignored packets:
case E_KEEP_ALIVE:
+ case E_CHAT:
+ case E_FLYING:
case E_PLAYERLOOK:
case E_PLAYERMOVELOOK:
case E_PLAYERPOS: break;
@@ -535,6 +532,8 @@ void cClientHandle::HandlePacket(cPacket * a_Packet)
{
// Ignored packets:
case E_KEEP_ALIVE:
+ case E_CHAT:
+ case E_FLYING:
case E_PLAYERLOOK:
case E_PLAYERPOS: break;
diff --git a/source/cServer.cpp b/source/cServer.cpp
index 8462fa915..97bcffaae 100644
--- a/source/cServer.cpp
+++ b/source/cServer.cpp
@@ -102,7 +102,7 @@ void cServer::ServerListenThread( void *a_Args )
void cServer::ClientDestroying(const cClientHandle * a_Client)
{
- m_SocketThreads.RemoveClient(a_Client);
+ m_SocketThreads.StopReading(a_Client);
}
diff --git a/source/cSocketThreads.cpp b/source/cSocketThreads.cpp
index aa0aba678..5e98398c4 100644
--- a/source/cSocketThreads.cpp
+++ b/source/cSocketThreads.cpp
@@ -85,7 +85,9 @@ void cSocketThreads::RemoveClient(const cSocket * a_Socket)
{
return;
}
- }
+ } // for itr - m_Threads[]
+
+ ASSERT(!"Removing an unknown socket");
}
@@ -103,7 +105,9 @@ void cSocketThreads::RemoveClient(const cCallback * a_Client)
{
return;
}
- }
+ } // for itr - m_Threads[]
+
+ ASSERT(!"Removing an unknown client");
}
@@ -121,7 +125,81 @@ void cSocketThreads::NotifyWrite(const cCallback * a_Client)
{
return;
}
+ } // for itr - m_Threads[]
+
+ // Cannot assert - this normally happens if a client disconnects and has pending packets, the cServer::cNotifyWriteThread will call this on invalid clients too
+ // ASSERT(!"Notifying write to an unknown client");
+}
+
+
+
+
+
+void cSocketThreads::Write(const cSocket * a_Socket, const AString & a_Data)
+{
+ // Puts a_Data into outgoing data queue for a_Socket
+
+ if (!a_Socket->IsValid())
+ {
+ // Socket already closed, ignore the request
+ return;
+ }
+
+ cCSLock Lock(m_CS);
+ for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
+ {
+ if ((*itr)->Write(a_Socket, a_Data))
+ {
+ return;
+ }
+ } // for itr - m_Threads[]
+
+ ASSERT(!"Writing to an unknown socket");
+}
+
+
+
+
+
+/// Stops reading from the socket - when this call returns, no more calls to the callbacks are made
+void cSocketThreads::StopReading(const cCallback * a_Client)
+{
+ cCSLock Lock(m_CS);
+ for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
+ {
+ if ((*itr)->StopReading(a_Client))
+ {
+ return;
+ }
+ } // for itr - m_Threads[]
+
+ // Cannot assert, this normally happens if the socket is closed before the client deinitializes
+ // ASSERT(!"Stopping reading on an unknown client");
+}
+
+
+
+
+
+/// Queues the socket for closing, as soon as its outgoing data is sent
+void cSocketThreads::QueueClose(const cSocket * a_Socket)
+{
+ if (!a_Socket->IsValid())
+ {
+ // Already closed, ignore the request
+ return;
}
+
+ cCSLock Lock(m_CS);
+ for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
+ {
+ if ((*itr)->QueueClose(a_Socket))
+ {
+ return;
+ }
+ } // for itr - m_Threads[]
+
+ ASSERT(!"Queueing close of an unknown socket");
}
@@ -189,8 +267,7 @@ bool cSocketThreads::cSocketThread::RemoveClient(const cCallback * a_Client)
}
// Found, remove it:
- m_Slots[i] = m_Slots[m_NumSlots - 1];
- m_NumSlots--;
+ m_Slots[i] = m_Slots[--m_NumSlots];
// Notify the thread of the change:
ASSERT(m_ControlSocket2.IsValid());
@@ -210,11 +287,6 @@ bool cSocketThreads::cSocketThread::RemoveSocket(const cSocket * a_Socket)
{
// Returns true if removed, false if not found
- if (m_NumSlots == 0)
- {
- return false;
- }
-
for (int i = m_NumSlots - 1; i >= 0 ; --i)
{
if (m_Slots[i].m_Socket != a_Socket)
@@ -223,8 +295,7 @@ bool cSocketThreads::cSocketThread::RemoveSocket(const cSocket * a_Socket)
}
// Found, remove it:
- m_Slots[i] = m_Slots[m_NumSlots - 1];
- m_NumSlots--;
+ m_Slots[i] = m_Slots[--m_NumSlots];
// Notify the thread of the change:
ASSERT(m_ControlSocket2.IsValid());
@@ -240,6 +311,38 @@ bool cSocketThreads::cSocketThread::RemoveSocket(const cSocket * a_Socket)
+bool cSocketThreads::cSocketThread::HasClient(const cCallback * a_Client) const
+{
+ for (int i = m_NumSlots - 1; i >= 0; --i)
+ {
+ if (m_Slots[i].m_Client == a_Client)
+ {
+ return true;
+ }
+ } // for i - m_Slots[]
+ return false;
+}
+
+
+
+
+
+bool cSocketThreads::cSocketThread::HasSocket(const cSocket * a_Socket) const
+{
+ for (int i = m_NumSlots - 1; i >= 0; --i)
+ {
+ if (m_Slots[i].m_Socket->GetSocket() == a_Socket->GetSocket())
+ {
+ return true;
+ }
+ } // for i - m_Slots[]
+ return false;
+}
+
+
+
+
+
bool cSocketThreads::cSocketThread::NotifyWrite(const cCallback * a_Client)
{
if (HasClient(a_Client))
@@ -256,12 +359,43 @@ bool cSocketThreads::cSocketThread::NotifyWrite(const cCallback * a_Client)
-bool cSocketThreads::cSocketThread::HasClient(const cCallback * a_Client) const
+bool cSocketThreads::cSocketThread::Write(const cSocket * a_Socket, const AString & a_Data)
{
+ // Returns true if socket handled by this thread
+ for (int i = m_NumSlots - 1; i >= 0; --i)
+ {
+ if (m_Slots[i].m_Socket == a_Socket)
+ {
+ m_Slots[i].m_Outgoing.append(a_Data);
+
+ // Notify the thread that there's data in the queue:
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("q", 1);
+
+ return true;
+ }
+ } // for i - m_Slots[]
+ return false;
+}
+
+
+
+
+
+bool cSocketThreads::cSocketThread::StopReading (const cCallback * a_Client)
+{
+ // Returns true if client handled by this thread
for (int i = m_NumSlots - 1; i >= 0; --i)
{
if (m_Slots[i].m_Client == a_Client)
{
+ m_Slots[i].m_Client = NULL;
+ m_Slots[i].m_ShouldClose = false;
+
+ // Notify the thread that there's a stop reading request:
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("s", 1);
+
return true;
}
} // for i - m_Slots[]
@@ -272,12 +406,20 @@ bool cSocketThreads::cSocketThread::HasClient(const cCallback * a_Client) const
-bool cSocketThreads::cSocketThread::HasSocket(const cSocket * a_Socket) const
+bool cSocketThreads::cSocketThread::QueueClose(const cSocket * a_Socket)
{
+ // Returns true if socket handled by this thread
for (int i = m_NumSlots - 1; i >= 0; --i)
{
- if (m_Slots[i].m_Socket->GetSocket() == a_Socket->GetSocket())
+ if (m_Slots[i].m_Socket == a_Socket)
{
+ ASSERT(m_Slots[i].m_Client == NULL); // Should have stopped reading first
+ m_Slots[i].m_ShouldClose = true;
+
+ // Notify the thread that there's a close queued (in case its conditions are already met):
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("c", 1);
+
return true;
}
} // for i - m_Slots[]
@@ -453,17 +595,26 @@ void cSocketThreads::cSocketThread::ReadFromSockets(fd_set * a_Read)
{
// The socket has been closed by the remote party, close our socket and let it be removed after we process all reading
m_Slots[i].m_Socket->CloseSocket();
- m_Slots[i].m_Client->SocketClosed();
+ if (m_Slots[i].m_Client != NULL)
+ {
+ m_Slots[i].m_Client->SocketClosed();
+ }
}
else if (Received > 0)
{
- m_Slots[i].m_Client->DataReceived(Buffer, Received);
+ if (m_Slots[i].m_Client != NULL)
+ {
+ m_Slots[i].m_Client->DataReceived(Buffer, Received);
+ }
}
else
{
// The socket has encountered an error, close it and let it be removed after we process all reading
m_Slots[i].m_Socket->CloseSocket();
- m_Slots[i].m_Client->SocketClosed();
+ if (m_Slots[i].m_Client != NULL)
+ {
+ m_Slots[i].m_Client->SocketClosed();
+ }
}
} // for i - m_Slots[]
}
@@ -485,10 +636,19 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
if (m_Slots[i].m_Outgoing.empty())
{
// Request another chunk of outgoing data:
- m_Slots[i].m_Client->GetOutgoingData(m_Slots[i].m_Outgoing);
+ if (m_Slots[i].m_Client != NULL)
+ {
+ m_Slots[i].m_Client->GetOutgoingData(m_Slots[i].m_Outgoing);
+ }
if (m_Slots[i].m_Outgoing.empty())
{
- // Nothing ready yet
+ // Nothing ready
+ if ((m_Slots[i].m_Client == NULL) && m_Slots[i].m_ShouldClose)
+ {
+ // Socket was queued for closing and there's no more data to send, close it now:
+ m_Slots[i].m_Socket->CloseSocket();
+ m_Slots[i] = m_Slots[--m_NumSlots];
+ }
continue;
}
} // if (outgoing data is empty)
@@ -496,9 +656,13 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
int Sent = m_Slots[i].m_Socket->Send(m_Slots[i].m_Outgoing.data(), m_Slots[i].m_Outgoing.size());
if (Sent < 0)
{
- LOGWARNING("Error while writing to client \"%s\", disconnecting", m_Slots[i].m_Socket->GetIPString().c_str());
+ int Err = cSocket::GetLastError();
+ LOGWARNING("Error %d while writing to client \"%s\", disconnecting. \"%s\"", Err, m_Slots[i].m_Socket->GetIPString().c_str(), cSocket::GetErrorString(Err).c_str());
m_Slots[i].m_Socket->CloseSocket();
- m_Slots[i].m_Client->SocketClosed();
+ if (m_Slots[i].m_Client != NULL)
+ {
+ m_Slots[i].m_Client->SocketClosed();
+ }
return;
}
m_Slots[i].m_Outgoing.erase(0, Sent);
@@ -531,8 +695,7 @@ void cSocketThreads::cSocketThread::RemoveClosedSockets(void)
{
continue;
}
- m_Slots[i] = m_Slots[m_NumSlots - 1];
- m_NumSlots--;
+ m_Slots[i] = m_Slots[--m_NumSlots];
} // for i - m_Slots[]
}
diff --git a/source/cSocketThreads.h b/source/cSocketThreads.h
index a32808aeb..a8174a115 100644
--- a/source/cSocketThreads.h
+++ b/source/cSocketThreads.h
@@ -5,6 +5,16 @@
// This object takes care of network communication, groups sockets into threads and uses as little threads as possible for full read / write support
// For more detail, see http://forum.mc-server.org/showthread.php?tid=327
+/*
+Additional details:
+When a client is terminating a connection:
+- they call the StopReading() method to disable callbacks for the incoming data
+- they call the Write() method to queue any outstanding outgoing data
+- they call the QueueClose() method to queue the socket to close after outgoing data has been sent.
+When a socket slot is marked as having no callback, it is kept alive until its outgoing data queue is empty and its m_ShouldClose flag is set.
+This means that the socket can be written to several times before finally closing it via QueueClose()
+*/
+
@@ -76,6 +86,15 @@ public:
/// Notify the thread responsible for a_Client that the client has something to write
void NotifyWrite(const cCallback * a_Client);
+
+ /// Puts a_Data into outgoing data queue for a_Socket
+ void Write(const cSocket * a_Socket, const AString & a_Data);
+
+ /// Stops reading from the socket - when this call returns, no more calls to the callbacks are made
+ void StopReading(const cCallback * a_Client);
+
+ /// Queues the socket for closing, as soon as its outgoing data is sent
+ void QueueClose(const cSocket * a_Socket);
private:
@@ -99,6 +118,9 @@ private:
bool HasClient (const cCallback * a_Client) const;
bool HasSocket (const cSocket * a_Socket) const;
bool NotifyWrite (const cCallback * a_Client); // Returns true if client handled by this thread
+ bool Write (const cSocket * a_Socket, const AString & a_Data); // Returns true if socket handled by this thread
+ bool StopReading (const cCallback * a_Client); // Returns true if client handled by this thread
+ bool QueueClose (const cSocket * a_Socket); // Returns true if socket handled by this thread
bool Start(void); // Hide the cIsThread's Start method, we need to provide our own startup to create the control socket
@@ -119,6 +141,7 @@ private:
cSocket * m_Socket;
cCallback * m_Client;
AString m_Outgoing; // If sending writes only partial data, the rest is stored here for another send
+ bool m_ShouldClose; // If true, the socket is to be closed after sending all outgoing data
} ;
sSlot m_Slots[MAX_SLOTS];
int m_NumSlots; // Number of slots actually used
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 08:10:26 +0100