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-rw-r--r--source/cSocketThreads.cpp1430
1 files changed, 715 insertions, 715 deletions
diff --git a/source/cSocketThreads.cpp b/source/cSocketThreads.cpp
index fbef2a2c3..b27523972 100644
--- a/source/cSocketThreads.cpp
+++ b/source/cSocketThreads.cpp
@@ -1,715 +1,715 @@
-
-// cSocketThreads.cpp
-
-// Implements the cSocketThreads class representing the heart of MCS's client networking.
-// 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
-
-#include "Globals.h"
-#include "cSocketThreads.h"
-#include "cClientHandle.h"
-// #include "packets/cPacket_RelativeEntityMoveLook.h"
-
-
-
-
-
-///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// cSocketThreads:
-
-cSocketThreads::cSocketThreads(void)
-{
- LOG("cSocketThreads startup");
-}
-
-
-
-
-
-cSocketThreads::~cSocketThreads()
-{
- for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
- {
- delete *itr;
- } // for itr - m_Threads[]
- m_Threads.clear();
-}
-
-
-
-
-
-
-bool cSocketThreads::AddClient(cSocket * a_Socket, cCallback * a_Client)
-{
- // Add a (socket, client) pair for processing, data from a_Socket is to be sent to a_Client
-
- // Try to add to existing threads:
- cCSLock Lock(m_CS);
- for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
- {
- if ((*itr)->IsValid() && (*itr)->HasEmptySlot())
- {
- (*itr)->AddClient(a_Socket, a_Client);
- return true;
- }
- }
-
- // No thread has free space, create a new one:
- LOG("Creating a new cSocketThread (currently have %d)", m_Threads.size());
- cSocketThread * Thread = new cSocketThread(this);
- if (!Thread->Start())
- {
- // There was an error launching the thread (but it was already logged along with the reason)
- LOGERROR("A new cSocketThread failed to start");
- delete Thread;
- return false;
- }
- Thread->AddClient(a_Socket, a_Client);
- m_Threads.push_back(Thread);
- return true;
-}
-
-
-
-
-
-void cSocketThreads::RemoveClient(const cSocket * a_Socket)
-{
- // Remove the socket (and associated client) from processing
-
- cCSLock Lock(m_CS);
- for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
- {
- if ((*itr)->RemoveSocket(a_Socket))
- {
- return;
- }
- } // for itr - m_Threads[]
-
- // Cannot assert here, this may actually happen legally, since cClientHandle has to clean up the socket and it may have already closed in the meantime
- // ASSERT(!"Removing an unknown socket");
-}
-
-
-
-
-
-void cSocketThreads::RemoveClient(const cCallback * a_Client)
-{
- // Remove the associated socket and the client from processing
-
- cCSLock Lock(m_CS);
- for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
- {
- if ((*itr)->RemoveClient(a_Client))
- {
- return;
- }
- } // for itr - m_Threads[]
-
- ASSERT(!"Removing an unknown client");
-}
-
-
-
-
-
-void cSocketThreads::NotifyWrite(const cCallback * a_Client)
-{
- // Notifies the thread responsible for a_Client that the client has something to write
-
- cCSLock Lock(m_CS);
- for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
- {
- if ((*itr)->NotifyWrite(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[]
-
- // This may be perfectly legal, if the socket has been destroyed and the client is finishing up
- // 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");
-}
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
-// cSocketThreads::cSocketThread:
-
-cSocketThreads::cSocketThread::cSocketThread(cSocketThreads * a_Parent) :
- cIsThread("cSocketThread"),
- m_Parent(a_Parent),
- m_NumSlots(0)
-{
- // Nothing needed yet
-}
-
-
-
-
-
-cSocketThreads::cSocketThread::~cSocketThread()
-{
- m_ShouldTerminate = true;
-
- // Notify the thread:
- ASSERT(m_ControlSocket2.IsValid());
- m_ControlSocket2.Send("a", 1);
-
- // Wait for the thread to finish:
- Wait();
-
- // Close the control sockets:
- m_ControlSocket1.CloseSocket();
- m_ControlSocket2.CloseSocket();
-}
-
-
-
-
-
-void cSocketThreads::cSocketThread::AddClient(cSocket * a_Socket, cCallback * a_Client)
-{
- ASSERT(m_NumSlots < MAX_SLOTS); // Use HasEmptySlot() to check before adding
-
- m_Slots[m_NumSlots].m_Client = a_Client;
- m_Slots[m_NumSlots].m_Socket = a_Socket;
- m_Slots[m_NumSlots].m_Outgoing.clear();
- m_NumSlots++;
-
- // Notify the thread of the change:
- ASSERT(m_ControlSocket2.IsValid());
- m_ControlSocket2.Send("a", 1);
-}
-
-
-
-
-
-bool cSocketThreads::cSocketThread::RemoveClient(const cCallback * a_Client)
-{
- // 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_Client != a_Client)
- {
- continue;
- }
-
- // Found, remove it:
- m_Slots[i] = m_Slots[--m_NumSlots];
-
- // Notify the thread of the change:
- ASSERT(m_ControlSocket2.IsValid());
- m_ControlSocket2.Send("r", 1);
- return true;
- } // for i - m_Slots[]
-
- // Not found
- return false;
-}
-
-
-
-
-
-bool cSocketThreads::cSocketThread::RemoveSocket(const cSocket * a_Socket)
-{
- // Returns true if removed, false if not found
-
- for (int i = m_NumSlots - 1; i >= 0 ; --i)
- {
- if (m_Slots[i].m_Socket != a_Socket)
- {
- continue;
- }
-
- // Found, remove it:
- m_Slots[i] = m_Slots[--m_NumSlots];
-
- // Notify the thread of the change:
- ASSERT(m_ControlSocket2.IsValid());
- m_ControlSocket2.Send("r", 1);
- return true;
- } // for i - m_Slots[]
-
- // Not found
- return false;
-}
-
-
-
-
-
-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))
- {
- // Notify the thread that there's another packet in the queue:
- ASSERT(m_ControlSocket2.IsValid());
- m_ControlSocket2.Send("q", 1);
- return true;
- }
- return false;
-}
-
-
-
-
-
-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[]
- return false;
-}
-
-
-
-
-
-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 == 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[]
- return false;
-}
-
-
-
-
-
-bool cSocketThreads::cSocketThread::Start(void)
-{
- // Create the control socket listener
- m_ControlSocket2 = cSocket::CreateSocket();
- if (!m_ControlSocket2.IsValid())
- {
- LOGERROR("Cannot create a Control socket for a cSocketThread (\"%s\"); continuing, but server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
- return false;
- }
- cSocket::SockAddr_In Addr;
- Addr.Family = cSocket::ADDRESS_FAMILY_INTERNET;
- Addr.Address = cSocket::INTERNET_ADDRESS_LOCALHOST();
- Addr.Port = 0; // Any free port is okay
- if (m_ControlSocket2.Bind(Addr) != 0)
- {
- LOGERROR("Cannot bind a Control socket for a cSocketThread (\"%s\"); continuing, but server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
- m_ControlSocket2.CloseSocket();
- return false;
- }
- if (m_ControlSocket2.Listen(1) != 0)
- {
- LOGERROR("Cannot listen on a Control socket for a cSocketThread (\"%s\"); continuing, but server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
- m_ControlSocket2.CloseSocket();
- return false;
- }
- if (m_ControlSocket2.GetPort() == 0)
- {
- LOGERROR("Cannot determine Control socket port (\"%s\"); conitnuing, but the server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
- m_ControlSocket2.CloseSocket();
- return false;
- }
-
- // Start the thread
- if (!super::Start())
- {
- LOGERROR("Cannot start new cSocketThread");
- m_ControlSocket2.CloseSocket();
- return false;
- }
-
- // Finish connecting the control socket by accepting connection from the thread's socket
- cSocket tmp = m_ControlSocket2.Accept();
- if (!tmp.IsValid())
- {
- LOGERROR("Cannot link Control sockets for a cSocketThread (\"%s\"); continuing, but server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
- m_ControlSocket2.CloseSocket();
- return false;
- }
- m_ControlSocket2.CloseSocket();
- m_ControlSocket2 = tmp;
-
- return true;
-}
-
-
-
-
-
-void cSocketThreads::cSocketThread::Execute(void)
-{
- // Connect the "client" part of the Control socket:
- m_ControlSocket1 = cSocket::CreateSocket();
- cSocket::SockAddr_In Addr;
- Addr.Family = cSocket::ADDRESS_FAMILY_INTERNET;
- Addr.Address = cSocket::INTERNET_ADDRESS_LOCALHOST();
- Addr.Port = m_ControlSocket2.GetPort();
- ASSERT(Addr.Port != 0); // We checked in the Start() method, but let's be sure
- if (m_ControlSocket1.Connect(Addr) != 0)
- {
- LOGERROR("Cannot connect Control sockets for a cSocketThread (\"%s\"); continuing, but the server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
- m_ControlSocket2.CloseSocket();
- return;
- }
-
- // The main thread loop:
- while (!m_ShouldTerminate)
- {
- // Put all sockets into the Read set:
- fd_set fdRead;
- cSocket::xSocket Highest = m_ControlSocket1.GetSocket();
-
- PrepareSet(&fdRead, Highest);
-
- // Wait for the sockets:
- if (select(Highest + 1, &fdRead, NULL, NULL, NULL) == -1)
- {
- LOG("select(R) call failed in cSocketThread: \"%s\"", cSocket::GetLastErrorString().c_str());
- continue;
- }
-
- ReadFromSockets(&fdRead);
-
- // Test sockets for writing:
- fd_set fdWrite;
- Highest = m_ControlSocket1.GetSocket();
- PrepareSet(&fdWrite, Highest);
- timeval Timeout;
- Timeout.tv_sec = 0;
- Timeout.tv_usec = 0;
- if (select(Highest + 1, NULL, &fdWrite, NULL, &Timeout) == -1)
- {
- LOG("select(W) call failed in cSocketThread: \"%s\"", cSocket::GetLastErrorString().c_str());
- continue;
- }
-
- WriteToSockets(&fdWrite);
-
- RemoveClosedSockets();
- } // while (!mShouldTerminate)
-}
-
-
-
-
-
-void cSocketThreads::cSocketThread::PrepareSet(fd_set * a_Set, cSocket::xSocket & a_Highest)
-{
- FD_ZERO(a_Set);
- FD_SET(m_ControlSocket1.GetSocket(), a_Set);
-
- cCSLock Lock(m_Parent->m_CS);
- for (int i = m_NumSlots - 1; i >= 0; --i)
- {
- if (!m_Slots[i].m_Socket->IsValid())
- {
- continue;
- }
- cSocket::xSocket s = m_Slots[i].m_Socket->GetSocket();
- FD_SET(s, a_Set);
- if (s > a_Highest)
- {
- a_Highest = s;
- }
- } // for i - m_Slots[]
-}
-
-
-
-
-
-void cSocketThreads::cSocketThread::ReadFromSockets(fd_set * a_Read)
-{
- // Read on available sockets:
-
- // Reset Control socket state:
- if (FD_ISSET(m_ControlSocket1.GetSocket(), a_Read))
- {
- char Dummy[128];
- m_ControlSocket1.Receive(Dummy, sizeof(Dummy), 0);
- }
-
- // Read from clients:
- cCSLock Lock(m_Parent->m_CS);
- for (int i = m_NumSlots - 1; i >= 0; --i)
- {
- if (!FD_ISSET(m_Slots[i].m_Socket->GetSocket(), a_Read))
- {
- continue;
- }
- char Buffer[1024];
- int Received = m_Slots[i].m_Socket->Receive(Buffer, ARRAYCOUNT(Buffer), 0);
- if (Received == 0)
- {
- // 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();
- if (m_Slots[i].m_Client != NULL)
- {
- m_Slots[i].m_Client->SocketClosed();
- }
- }
- else if (Received > 0)
- {
- 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();
- if (m_Slots[i].m_Client != NULL)
- {
- m_Slots[i].m_Client->SocketClosed();
- }
- }
- } // for i - m_Slots[]
-}
-
-
-
-
-
-void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
-{
- // Write to available client sockets:
- cCSLock Lock(m_Parent->m_CS);
- for (int i = m_NumSlots - 1; i >= 0; --i)
- {
- if (!FD_ISSET(m_Slots[i].m_Socket->GetSocket(), a_Write))
- {
- continue;
- }
- if (m_Slots[i].m_Outgoing.empty())
- {
- // Request another chunk of outgoing data:
- 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
- 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)
-
- int Sent = m_Slots[i].m_Socket->Send(m_Slots[i].m_Outgoing.data(), m_Slots[i].m_Outgoing.size());
- if (Sent < 0)
- {
- 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();
- if (m_Slots[i].m_Client != NULL)
- {
- m_Slots[i].m_Client->SocketClosed();
- }
- return;
- }
- m_Slots[i].m_Outgoing.erase(0, Sent);
-
- // _X: If there's data left, it means the client is not reading fast enough, the server would unnecessarily spin in the main loop with zero actions taken; so signalling is disabled
- // This means that if there's data left, it will be sent only when there's incoming data or someone queues another packet (for any socket handled by this thread)
- /*
- // If there's any data left, signalize the Control socket:
- if (!m_Slots[i].m_Outgoing.empty())
- {
- ASSERT(m_ControlSocket2.IsValid());
- m_ControlSocket2.Send("q", 1);
- }
- */
- } // for i - m_Slots[i]
-}
-
-
-
-
-
-void cSocketThreads::cSocketThread::RemoveClosedSockets(void)
-{
- // Removes sockets that have closed from m_Slots[]
-
- cCSLock Lock(m_Parent->m_CS);
- for (int i = m_NumSlots - 1; i >= 0; --i)
- {
- if (m_Slots[i].m_Socket->IsValid())
- {
- continue;
- }
- m_Slots[i] = m_Slots[--m_NumSlots];
- } // for i - m_Slots[]
-}
-
-
-
-
+
+// cSocketThreads.cpp
+
+// Implements the cSocketThreads class representing the heart of MCS's client networking.
+// 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
+
+#include "Globals.h"
+#include "cSocketThreads.h"
+#include "cClientHandle.h"
+// #include "packets/cPacket_RelativeEntityMoveLook.h"
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cSocketThreads:
+
+cSocketThreads::cSocketThreads(void)
+{
+ LOG("cSocketThreads startup");
+}
+
+
+
+
+
+cSocketThreads::~cSocketThreads()
+{
+ for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
+ {
+ delete *itr;
+ } // for itr - m_Threads[]
+ m_Threads.clear();
+}
+
+
+
+
+
+
+bool cSocketThreads::AddClient(cSocket * a_Socket, cCallback * a_Client)
+{
+ // Add a (socket, client) pair for processing, data from a_Socket is to be sent to a_Client
+
+ // Try to add to existing threads:
+ cCSLock Lock(m_CS);
+ for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
+ {
+ if ((*itr)->IsValid() && (*itr)->HasEmptySlot())
+ {
+ (*itr)->AddClient(a_Socket, a_Client);
+ return true;
+ }
+ }
+
+ // No thread has free space, create a new one:
+ LOG("Creating a new cSocketThread (currently have %d)", m_Threads.size());
+ cSocketThread * Thread = new cSocketThread(this);
+ if (!Thread->Start())
+ {
+ // There was an error launching the thread (but it was already logged along with the reason)
+ LOGERROR("A new cSocketThread failed to start");
+ delete Thread;
+ return false;
+ }
+ Thread->AddClient(a_Socket, a_Client);
+ m_Threads.push_back(Thread);
+ return true;
+}
+
+
+
+
+
+void cSocketThreads::RemoveClient(const cSocket * a_Socket)
+{
+ // Remove the socket (and associated client) from processing
+
+ cCSLock Lock(m_CS);
+ for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
+ {
+ if ((*itr)->RemoveSocket(a_Socket))
+ {
+ return;
+ }
+ } // for itr - m_Threads[]
+
+ // Cannot assert here, this may actually happen legally, since cClientHandle has to clean up the socket and it may have already closed in the meantime
+ // ASSERT(!"Removing an unknown socket");
+}
+
+
+
+
+
+void cSocketThreads::RemoveClient(const cCallback * a_Client)
+{
+ // Remove the associated socket and the client from processing
+
+ cCSLock Lock(m_CS);
+ for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
+ {
+ if ((*itr)->RemoveClient(a_Client))
+ {
+ return;
+ }
+ } // for itr - m_Threads[]
+
+ ASSERT(!"Removing an unknown client");
+}
+
+
+
+
+
+void cSocketThreads::NotifyWrite(const cCallback * a_Client)
+{
+ // Notifies the thread responsible for a_Client that the client has something to write
+
+ cCSLock Lock(m_CS);
+ for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
+ {
+ if ((*itr)->NotifyWrite(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[]
+
+ // This may be perfectly legal, if the socket has been destroyed and the client is finishing up
+ // 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");
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cSocketThreads::cSocketThread:
+
+cSocketThreads::cSocketThread::cSocketThread(cSocketThreads * a_Parent) :
+ cIsThread("cSocketThread"),
+ m_Parent(a_Parent),
+ m_NumSlots(0)
+{
+ // Nothing needed yet
+}
+
+
+
+
+
+cSocketThreads::cSocketThread::~cSocketThread()
+{
+ m_ShouldTerminate = true;
+
+ // Notify the thread:
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("a", 1);
+
+ // Wait for the thread to finish:
+ Wait();
+
+ // Close the control sockets:
+ m_ControlSocket1.CloseSocket();
+ m_ControlSocket2.CloseSocket();
+}
+
+
+
+
+
+void cSocketThreads::cSocketThread::AddClient(cSocket * a_Socket, cCallback * a_Client)
+{
+ ASSERT(m_NumSlots < MAX_SLOTS); // Use HasEmptySlot() to check before adding
+
+ m_Slots[m_NumSlots].m_Client = a_Client;
+ m_Slots[m_NumSlots].m_Socket = a_Socket;
+ m_Slots[m_NumSlots].m_Outgoing.clear();
+ m_NumSlots++;
+
+ // Notify the thread of the change:
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("a", 1);
+}
+
+
+
+
+
+bool cSocketThreads::cSocketThread::RemoveClient(const cCallback * a_Client)
+{
+ // 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_Client != a_Client)
+ {
+ continue;
+ }
+
+ // Found, remove it:
+ m_Slots[i] = m_Slots[--m_NumSlots];
+
+ // Notify the thread of the change:
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("r", 1);
+ return true;
+ } // for i - m_Slots[]
+
+ // Not found
+ return false;
+}
+
+
+
+
+
+bool cSocketThreads::cSocketThread::RemoveSocket(const cSocket * a_Socket)
+{
+ // Returns true if removed, false if not found
+
+ for (int i = m_NumSlots - 1; i >= 0 ; --i)
+ {
+ if (m_Slots[i].m_Socket != a_Socket)
+ {
+ continue;
+ }
+
+ // Found, remove it:
+ m_Slots[i] = m_Slots[--m_NumSlots];
+
+ // Notify the thread of the change:
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("r", 1);
+ return true;
+ } // for i - m_Slots[]
+
+ // Not found
+ return false;
+}
+
+
+
+
+
+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))
+ {
+ // Notify the thread that there's another packet in the queue:
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("q", 1);
+ return true;
+ }
+ return false;
+}
+
+
+
+
+
+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[]
+ return false;
+}
+
+
+
+
+
+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 == 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[]
+ return false;
+}
+
+
+
+
+
+bool cSocketThreads::cSocketThread::Start(void)
+{
+ // Create the control socket listener
+ m_ControlSocket2 = cSocket::CreateSocket();
+ if (!m_ControlSocket2.IsValid())
+ {
+ LOGERROR("Cannot create a Control socket for a cSocketThread (\"%s\"); continuing, but server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
+ return false;
+ }
+ cSocket::SockAddr_In Addr;
+ Addr.Family = cSocket::ADDRESS_FAMILY_INTERNET;
+ Addr.Address = cSocket::INTERNET_ADDRESS_LOCALHOST();
+ Addr.Port = 0; // Any free port is okay
+ if (m_ControlSocket2.Bind(Addr) != 0)
+ {
+ LOGERROR("Cannot bind a Control socket for a cSocketThread (\"%s\"); continuing, but server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
+ m_ControlSocket2.CloseSocket();
+ return false;
+ }
+ if (m_ControlSocket2.Listen(1) != 0)
+ {
+ LOGERROR("Cannot listen on a Control socket for a cSocketThread (\"%s\"); continuing, but server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
+ m_ControlSocket2.CloseSocket();
+ return false;
+ }
+ if (m_ControlSocket2.GetPort() == 0)
+ {
+ LOGERROR("Cannot determine Control socket port (\"%s\"); conitnuing, but the server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
+ m_ControlSocket2.CloseSocket();
+ return false;
+ }
+
+ // Start the thread
+ if (!super::Start())
+ {
+ LOGERROR("Cannot start new cSocketThread");
+ m_ControlSocket2.CloseSocket();
+ return false;
+ }
+
+ // Finish connecting the control socket by accepting connection from the thread's socket
+ cSocket tmp = m_ControlSocket2.Accept();
+ if (!tmp.IsValid())
+ {
+ LOGERROR("Cannot link Control sockets for a cSocketThread (\"%s\"); continuing, but server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
+ m_ControlSocket2.CloseSocket();
+ return false;
+ }
+ m_ControlSocket2.CloseSocket();
+ m_ControlSocket2 = tmp;
+
+ return true;
+}
+
+
+
+
+
+void cSocketThreads::cSocketThread::Execute(void)
+{
+ // Connect the "client" part of the Control socket:
+ m_ControlSocket1 = cSocket::CreateSocket();
+ cSocket::SockAddr_In Addr;
+ Addr.Family = cSocket::ADDRESS_FAMILY_INTERNET;
+ Addr.Address = cSocket::INTERNET_ADDRESS_LOCALHOST();
+ Addr.Port = m_ControlSocket2.GetPort();
+ ASSERT(Addr.Port != 0); // We checked in the Start() method, but let's be sure
+ if (m_ControlSocket1.Connect(Addr) != 0)
+ {
+ LOGERROR("Cannot connect Control sockets for a cSocketThread (\"%s\"); continuing, but the server may be unreachable from now on.", cSocket::GetLastErrorString().c_str());
+ m_ControlSocket2.CloseSocket();
+ return;
+ }
+
+ // The main thread loop:
+ while (!m_ShouldTerminate)
+ {
+ // Put all sockets into the Read set:
+ fd_set fdRead;
+ cSocket::xSocket Highest = m_ControlSocket1.GetSocket();
+
+ PrepareSet(&fdRead, Highest);
+
+ // Wait for the sockets:
+ if (select(Highest + 1, &fdRead, NULL, NULL, NULL) == -1)
+ {
+ LOG("select(R) call failed in cSocketThread: \"%s\"", cSocket::GetLastErrorString().c_str());
+ continue;
+ }
+
+ ReadFromSockets(&fdRead);
+
+ // Test sockets for writing:
+ fd_set fdWrite;
+ Highest = m_ControlSocket1.GetSocket();
+ PrepareSet(&fdWrite, Highest);
+ timeval Timeout;
+ Timeout.tv_sec = 0;
+ Timeout.tv_usec = 0;
+ if (select(Highest + 1, NULL, &fdWrite, NULL, &Timeout) == -1)
+ {
+ LOG("select(W) call failed in cSocketThread: \"%s\"", cSocket::GetLastErrorString().c_str());
+ continue;
+ }
+
+ WriteToSockets(&fdWrite);
+
+ RemoveClosedSockets();
+ } // while (!mShouldTerminate)
+}
+
+
+
+
+
+void cSocketThreads::cSocketThread::PrepareSet(fd_set * a_Set, cSocket::xSocket & a_Highest)
+{
+ FD_ZERO(a_Set);
+ FD_SET(m_ControlSocket1.GetSocket(), a_Set);
+
+ cCSLock Lock(m_Parent->m_CS);
+ for (int i = m_NumSlots - 1; i >= 0; --i)
+ {
+ if (!m_Slots[i].m_Socket->IsValid())
+ {
+ continue;
+ }
+ cSocket::xSocket s = m_Slots[i].m_Socket->GetSocket();
+ FD_SET(s, a_Set);
+ if (s > a_Highest)
+ {
+ a_Highest = s;
+ }
+ } // for i - m_Slots[]
+}
+
+
+
+
+
+void cSocketThreads::cSocketThread::ReadFromSockets(fd_set * a_Read)
+{
+ // Read on available sockets:
+
+ // Reset Control socket state:
+ if (FD_ISSET(m_ControlSocket1.GetSocket(), a_Read))
+ {
+ char Dummy[128];
+ m_ControlSocket1.Receive(Dummy, sizeof(Dummy), 0);
+ }
+
+ // Read from clients:
+ cCSLock Lock(m_Parent->m_CS);
+ for (int i = m_NumSlots - 1; i >= 0; --i)
+ {
+ if (!FD_ISSET(m_Slots[i].m_Socket->GetSocket(), a_Read))
+ {
+ continue;
+ }
+ char Buffer[1024];
+ int Received = m_Slots[i].m_Socket->Receive(Buffer, ARRAYCOUNT(Buffer), 0);
+ if (Received == 0)
+ {
+ // 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();
+ if (m_Slots[i].m_Client != NULL)
+ {
+ m_Slots[i].m_Client->SocketClosed();
+ }
+ }
+ else if (Received > 0)
+ {
+ 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();
+ if (m_Slots[i].m_Client != NULL)
+ {
+ m_Slots[i].m_Client->SocketClosed();
+ }
+ }
+ } // for i - m_Slots[]
+}
+
+
+
+
+
+void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
+{
+ // Write to available client sockets:
+ cCSLock Lock(m_Parent->m_CS);
+ for (int i = m_NumSlots - 1; i >= 0; --i)
+ {
+ if (!FD_ISSET(m_Slots[i].m_Socket->GetSocket(), a_Write))
+ {
+ continue;
+ }
+ if (m_Slots[i].m_Outgoing.empty())
+ {
+ // Request another chunk of outgoing data:
+ 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
+ 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)
+
+ int Sent = m_Slots[i].m_Socket->Send(m_Slots[i].m_Outgoing.data(), m_Slots[i].m_Outgoing.size());
+ if (Sent < 0)
+ {
+ 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();
+ if (m_Slots[i].m_Client != NULL)
+ {
+ m_Slots[i].m_Client->SocketClosed();
+ }
+ return;
+ }
+ m_Slots[i].m_Outgoing.erase(0, Sent);
+
+ // _X: If there's data left, it means the client is not reading fast enough, the server would unnecessarily spin in the main loop with zero actions taken; so signalling is disabled
+ // This means that if there's data left, it will be sent only when there's incoming data or someone queues another packet (for any socket handled by this thread)
+ /*
+ // If there's any data left, signalize the Control socket:
+ if (!m_Slots[i].m_Outgoing.empty())
+ {
+ ASSERT(m_ControlSocket2.IsValid());
+ m_ControlSocket2.Send("q", 1);
+ }
+ */
+ } // for i - m_Slots[i]
+}
+
+
+
+
+
+void cSocketThreads::cSocketThread::RemoveClosedSockets(void)
+{
+ // Removes sockets that have closed from m_Slots[]
+
+ cCSLock Lock(m_Parent->m_CS);
+ for (int i = m_NumSlots - 1; i >= 0; --i)
+ {
+ if (m_Slots[i].m_Socket->IsValid())
+ {
+ continue;
+ }
+ m_Slots[i] = m_Slots[--m_NumSlots];
+ } // for i - m_Slots[]
+}
+
+
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 09:41:16 +0100