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-rw-r--r--src/OSSupport/CMakeLists.txt6
-rw-r--r--src/OSSupport/ListenThread.cpp238
-rw-r--r--src/OSSupport/ListenThread.h85
-rw-r--r--src/OSSupport/SocketThreads.cpp702
-rw-r--r--src/OSSupport/SocketThreads.h194
5 files changed, 0 insertions, 1225 deletions
diff --git a/src/OSSupport/CMakeLists.txt b/src/OSSupport/CMakeLists.txt
index c8e96cbec..6f609c519 100644
--- a/src/OSSupport/CMakeLists.txt
+++ b/src/OSSupport/CMakeLists.txt
@@ -13,12 +13,9 @@ SET (SRCS
HostnameLookup.cpp
IPLookup.cpp
IsThread.cpp
- ListenThread.cpp
NetworkSingleton.cpp
Semaphore.cpp
ServerHandleImpl.cpp
- Socket.cpp
- SocketThreads.cpp
StackTrace.cpp
TCPLinkImpl.cpp
)
@@ -32,14 +29,11 @@ SET (HDRS
HostnameLookup.h
IPLookup.h
IsThread.h
- ListenThread.h
Network.h
NetworkSingleton.h
Queue.h
Semaphore.h
ServerHandleImpl.h
- Socket.h
- SocketThreads.h
StackTrace.h
TCPLinkImpl.h
)
diff --git a/src/OSSupport/ListenThread.cpp b/src/OSSupport/ListenThread.cpp
deleted file mode 100644
index b029634e9..000000000
--- a/src/OSSupport/ListenThread.cpp
+++ /dev/null
@@ -1,238 +0,0 @@
-
-// ListenThread.cpp
-
-// Implements the cListenThread class representing the thread that listens for client connections
-
-#include "Globals.h"
-#include "ListenThread.h"
-
-
-
-
-
-cListenThread::cListenThread(cCallback & a_Callback, cSocket::eFamily a_Family, const AString & a_ServiceName) :
- super(Printf("ListenThread %s", a_ServiceName.c_str())),
- m_Callback(a_Callback),
- m_Family(a_Family),
- m_ShouldReuseAddr(false),
- m_ServiceName(a_ServiceName)
-{
-}
-
-
-
-
-
-cListenThread::~cListenThread()
-{
- Stop();
-}
-
-
-
-
-
-bool cListenThread::Initialize(const AString & a_PortsString)
-{
- ASSERT(m_Sockets.empty()); // Not yet started
-
- if (!CreateSockets(a_PortsString))
- {
- return false;
- }
-
- return true;
-}
-
-
-
-
-
-bool cListenThread::Start(void)
-{
- if (m_Sockets.empty())
- {
- // There are no sockets listening, either forgotten to initialize or the user specified no listening ports
- // Report as successful, though
- return true;
- }
- return super::Start();
-}
-
-
-
-
-
-void cListenThread::Stop(void)
-{
- if (m_Sockets.empty())
- {
- // No sockets means no thread was running in the first place
- return;
- }
-
- m_ShouldTerminate = true;
-
- // Close one socket to wake the thread up from the select() call
- m_Sockets[0].CloseSocket();
-
- // Wait for the thread to finish
- super::Wait();
-
- // Close all the listening sockets:
- for (cSockets::iterator itr = m_Sockets.begin() + 1, end = m_Sockets.end(); itr != end; ++itr)
- {
- itr->CloseSocket();
- } // for itr - m_Sockets[]
- m_Sockets.clear();
-}
-
-
-
-
-
-void cListenThread::SetReuseAddr(bool a_Reuse)
-{
- ASSERT(m_Sockets.empty()); // Must not have been Initialize()d yet
-
- m_ShouldReuseAddr = a_Reuse;
-}
-
-
-
-
-
-bool cListenThread::CreateSockets(const AString & a_PortsString)
-{
- AStringVector Ports = StringSplitAndTrim(a_PortsString, ",");
-
- if (Ports.empty())
- {
- return false;
- }
-
- AString FamilyStr = m_ServiceName;
- switch (m_Family)
- {
- case cSocket::IPv4: FamilyStr.append(" IPv4"); break;
- case cSocket::IPv6: FamilyStr.append(" IPv6"); break;
- default:
- {
- ASSERT(!"Unknown address family");
- break;
- }
- }
-
- for (AStringVector::const_iterator itr = Ports.begin(), end = Ports.end(); itr != end; ++itr)
- {
- int Port = atoi(itr->c_str());
- if ((Port <= 0) || (Port > 65535))
- {
- LOGWARNING("%s: Invalid port specified: \"%s\".", FamilyStr.c_str(), itr->c_str());
- continue;
- }
- m_Sockets.push_back(cSocket::CreateSocket(m_Family));
- if (!m_Sockets.back().IsValid())
- {
- LOGWARNING("%s: Cannot create listening socket for port %d: \"%s\"", FamilyStr.c_str(), Port, cSocket::GetLastErrorString().c_str());
- m_Sockets.pop_back();
- continue;
- }
-
- if (m_ShouldReuseAddr)
- {
- if (!m_Sockets.back().SetReuseAddress())
- {
- LOG("%s: Port %d cannot reuse addr, syscall failed: \"%s\".", FamilyStr.c_str(), Port, cSocket::GetLastErrorString().c_str());
- }
- }
-
- // Bind to port:
- bool res = false;
- switch (m_Family)
- {
- case cSocket::IPv4: res = m_Sockets.back().BindToAnyIPv4(Port); break;
- case cSocket::IPv6: res = m_Sockets.back().BindToAnyIPv6(Port); break;
- default:
- {
- ASSERT(!"Unknown address family");
- res = false;
- }
- }
- if (!res)
- {
- LOGWARNING("%s: Cannot bind port %d: \"%s\".", FamilyStr.c_str(), Port, cSocket::GetLastErrorString().c_str());
- m_Sockets.pop_back();
- continue;
- }
-
- if (!m_Sockets.back().Listen())
- {
- LOGWARNING("%s: Cannot listen on port %d: \"%s\".", FamilyStr.c_str(), Port, cSocket::GetLastErrorString().c_str());
- m_Sockets.pop_back();
- continue;
- }
-
- LOGINFO("%s: Port %d is open for connections", FamilyStr.c_str(), Port);
- } // for itr - Ports[]
-
- return !(m_Sockets.empty());
-}
-
-
-
-
-
-void cListenThread::Execute(void)
-{
- if (m_Sockets.empty())
- {
- LOGD("Empty cListenThread, ending thread now.");
- return;
- }
-
- // Find the highest socket number:
- cSocket::xSocket Highest = m_Sockets[0].GetSocket();
- for (cSockets::iterator itr = m_Sockets.begin(), end = m_Sockets.end(); itr != end; ++itr)
- {
- if (itr->GetSocket() > Highest)
- {
- Highest = itr->GetSocket();
- }
- } // for itr - m_Sockets[]
-
- while (!m_ShouldTerminate)
- {
- // Put all sockets into a FD set:
- fd_set fdRead;
- FD_ZERO(&fdRead);
- for (cSockets::iterator itr = m_Sockets.begin(), end = m_Sockets.end(); itr != end; ++itr)
- {
- FD_SET(itr->GetSocket(), &fdRead);
- } // for itr - m_Sockets[]
-
- timeval tv; // On Linux select() doesn't seem to wake up when socket is closed, so let's kinda busy-wait:
- tv.tv_sec = 1;
- tv.tv_usec = 0;
- if (select((int)Highest + 1, &fdRead, nullptr, nullptr, &tv) == -1)
- {
- LOG("select(R) call failed in cListenThread: \"%s\"", cSocket::GetLastErrorString().c_str());
- continue;
- }
- for (cSockets::iterator itr = m_Sockets.begin(), end = m_Sockets.end(); itr != end; ++itr)
- {
- if (itr->IsValid() && FD_ISSET(itr->GetSocket(), &fdRead))
- {
- cSocket Client = (m_Family == cSocket::IPv4) ? itr->AcceptIPv4() : itr->AcceptIPv6();
- if (Client.IsValid())
- {
- m_Callback.OnConnectionAccepted(Client);
- }
- }
- } // for itr - m_Sockets[]
- } // while (!m_ShouldTerminate)
-}
-
-
-
-
diff --git a/src/OSSupport/ListenThread.h b/src/OSSupport/ListenThread.h
deleted file mode 100644
index b2d806c82..000000000
--- a/src/OSSupport/ListenThread.h
+++ /dev/null
@@ -1,85 +0,0 @@
-
-// ListenThread.h
-
-// Declares the cListenThread class representing the thread that listens for client connections
-
-
-
-
-
-#pragma once
-
-#include "IsThread.h"
-#include "Socket.h"
-
-
-
-
-
-// fwd:
-class cServer;
-
-
-
-
-
-class cListenThread :
- public cIsThread
-{
- typedef cIsThread super;
-
-public:
- /** Used as the callback for connection events */
- class cCallback
- {
- public:
- virtual ~cCallback() {}
-
- /** This callback is called whenever a socket connection is accepted */
- virtual void OnConnectionAccepted(cSocket & a_Socket) = 0;
- } ;
-
- cListenThread(cCallback & a_Callback, cSocket::eFamily a_Family, const AString & a_ServiceName = "");
- ~cListenThread();
-
- /** Creates all the sockets, returns trus if successful, false if not. */
- bool Initialize(const AString & a_PortsString);
-
- bool Start(void);
-
- void Stop(void);
-
- /** Call before Initialize() to set the "reuse" flag on the sockets */
- void SetReuseAddr(bool a_Reuse = true);
-
-protected:
- typedef std::vector<cSocket> cSockets;
-
- /** The callback which to notify of incoming connections */
- cCallback & m_Callback;
-
- /** Socket address family to use */
- cSocket::eFamily m_Family;
-
- /** Sockets that are being monitored */
- cSockets m_Sockets;
-
- /** If set to true, the SO_REUSEADDR socket option is set to true */
- bool m_ShouldReuseAddr;
-
- /** Name of the service that's listening on the ports; for logging purposes only */
- AString m_ServiceName;
-
-
- /** Fills in m_Sockets with individual sockets, each for one port specified in a_PortsString.
- Returns true if successful and at least one socket has been created
- */
- bool CreateSockets(const AString & a_PortsString);
-
- // cIsThread override:
- virtual void Execute(void) override;
-} ;
-
-
-
-
diff --git a/src/OSSupport/SocketThreads.cpp b/src/OSSupport/SocketThreads.cpp
deleted file mode 100644
index 153d6ed1d..000000000
--- a/src/OSSupport/SocketThreads.cpp
+++ /dev/null
@@ -1,702 +0,0 @@
-
-// 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 "SocketThreads.h"
-#include "Errors.h"
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
-// cSocketThreads:
-
-cSocketThreads::cSocketThreads(void)
-{
-}
-
-
-
-
-
-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(const 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:
- LOGD("Creating a new cSocketThread (currently have " SIZE_T_FMT ")", 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;
- Thread = nullptr;
- return false;
- }
- Thread->AddClient(a_Socket, a_Client);
- m_Threads.push_back(Thread);
- return true;
-}
-
-
-
-
-
-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[]
-
- // This client wasn't found.
- // It's not an error, because it may have been removed by a different thread in the meantime.
-}
-
-
-
-
-
-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 cCallback * a_Client, const AString & a_Data)
-{
- // Puts a_Data into outgoing data queue for a_Client
- cCSLock Lock(m_CS);
- for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
- {
- if ((*itr)->Write(a_Client, 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");
-}
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
-// 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(const cSocket & a_Socket, cCallback * a_Client)
-{
- ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
- 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_Socket.SetNonBlocking();
- m_Slots[m_NumSlots].m_Outgoing.clear();
- m_Slots[m_NumSlots].m_State = sSlot::ssNormal;
- 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)
-{
- ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
-
- 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 the slot:
- if (m_Slots[i].m_State == sSlot::ssRemoteClosed)
- {
- // The remote has already closed the socket, remove the slot altogether:
- if (m_Slots[i].m_Socket.IsValid())
- {
- m_Slots[i].m_Socket.CloseSocket();
- }
- m_Slots[i] = m_Slots[--m_NumSlots];
- }
- else
- {
- // Query and queue the last batch of outgoing data:
- AString Data;
- m_Slots[i].m_Client->GetOutgoingData(Data);
- m_Slots[i].m_Outgoing.append(Data);
- if (m_Slots[i].m_Outgoing.empty())
- {
- // No more outgoing data, shut the socket down immediately:
- m_Slots[i].m_Socket.ShutdownReadWrite();
- m_Slots[i].m_State = sSlot::ssShuttingDown;
- }
- else
- {
- // More data to send, shut down reading and wait for the rest to get sent:
- m_Slots[i].m_State = sSlot::ssWritingRestOut;
- }
- m_Slots[i].m_Client = nullptr;
- }
-
- // 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
-{
- ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
-
- 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 == *a_Socket)
- {
- return true;
- }
- } // for i - m_Slots[]
- return false;
-}
-
-
-
-
-
-bool cSocketThreads::cSocketThread::NotifyWrite(const cCallback * a_Client)
-{
- ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
-
- 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 cCallback * a_Client, const AString & a_Data)
-{
- ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
- for (int i = m_NumSlots - 1; i >= 0; --i)
- {
- if (m_Slots[i].m_Client == a_Client)
- {
- 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::Start(void)
-{
- // Create the control socket listener
- m_ControlSocket2 = cSocket::CreateSocket(cSocket::IPv4);
- 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;
- }
- if (!m_ControlSocket2.BindToLocalhostIPv4(cSocket::ANY_PORT))
- {
- 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))
- {
- 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.AcceptIPv4();
- 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::IPv4);
- ASSERT(m_ControlSocket2.GetPort() != 0); // We checked in the Start() method, but let's be sure
- if (!m_ControlSocket1.ConnectToLocalhostIPv4(m_ControlSocket2.GetPort()))
- {
- 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)
- {
- // Read outgoing data from the clients:
- QueueOutgoingData();
-
- // Put sockets into the sets
- fd_set fdRead;
- fd_set fdWrite;
- cSocket::xSocket Highest = m_ControlSocket1.GetSocket();
- PrepareSets(&fdRead, &fdWrite, Highest);
-
- // Wait for the sockets:
- timeval Timeout;
- Timeout.tv_sec = 5;
- Timeout.tv_usec = 0;
- if (select((int)Highest + 1, &fdRead, &fdWrite, nullptr, &Timeout) == -1)
- {
- LOG("select() call failed in cSocketThread: \"%s\"", cSocket::GetLastErrorString().c_str());
- continue;
- }
-
- // Perform the IO:
- ReadFromSockets(&fdRead);
- WriteToSockets(&fdWrite);
- CleanUpShutSockets();
- } // while (!mShouldTerminate)
-}
-
-
-
-
-
-void cSocketThreads::cSocketThread::PrepareSets(fd_set * a_Read, fd_set * a_Write, cSocket::xSocket & a_Highest)
-{
- FD_ZERO(a_Read);
- FD_ZERO(a_Write);
- FD_SET(m_ControlSocket1.GetSocket(), a_Read);
-
- cCSLock Lock(m_Parent->m_CS);
- for (int i = m_NumSlots - 1; i >= 0; --i)
- {
- if (!m_Slots[i].m_Socket.IsValid())
- {
- continue;
- }
- if (m_Slots[i].m_State == sSlot::ssRemoteClosed)
- {
- // This socket won't provide nor consume any data anymore, don't put it in the Set
- continue;
- }
- cSocket::xSocket s = m_Slots[i].m_Socket.GetSocket();
- FD_SET(s, a_Read);
- if (s > a_Highest)
- {
- a_Highest = s;
- }
- if (!m_Slots[i].m_Outgoing.empty())
- {
- // There's outgoing data for the socket, put it in the Write set
- FD_SET(s, a_Write);
- }
- } // 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)
- {
- cSocket::xSocket Socket = m_Slots[i].m_Socket.GetSocket();
- if (!cSocket::IsValidSocket(Socket) || !FD_ISSET(Socket, a_Read))
- {
- continue;
- }
- char Buffer[1024];
- int Received = m_Slots[i].m_Socket.Receive(Buffer, ARRAYCOUNT(Buffer), 0);
- if (Received <= 0)
- {
- if (cSocket::GetLastError() != cSocket::ErrWouldBlock)
- {
- // The socket has been closed by the remote party
- switch (m_Slots[i].m_State)
- {
- case sSlot::ssNormal:
- {
- // Close the socket on our side:
- m_Slots[i].m_State = sSlot::ssRemoteClosed;
- m_Slots[i].m_Socket.CloseSocket();
-
- // Notify the callback that the remote has closed the socket, *after* removing the socket:
- cCallback * client = m_Slots[i].m_Client;
- m_Slots[i] = m_Slots[--m_NumSlots];
- if (client != nullptr)
- {
- client->SocketClosed();
- }
- break;
- }
- case sSlot::ssWritingRestOut:
- case sSlot::ssShuttingDown:
- case sSlot::ssShuttingDown2:
- {
- // Force-close the socket and remove the slot:
- m_Slots[i].m_Socket.CloseSocket();
- m_Slots[i] = m_Slots[--m_NumSlots];
- break;
- }
- default:
- {
- LOG("%s: Unexpected socket state: %d (%s)",
- __FUNCTION__, m_Slots[i].m_Socket.GetSocket(), m_Slots[i].m_Socket.GetIPString().c_str()
- );
- ASSERT(!"Unexpected socket state");
- break;
- }
- } // switch (m_Slots[i].m_State)
- }
- }
- else
- {
- if (m_Slots[i].m_Client != nullptr)
- {
- m_Slots[i].m_Client->DataReceived(Buffer, Received);
- }
- }
- } // 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)
- {
- cSocket::xSocket Socket = m_Slots[i].m_Socket.GetSocket();
- if (!cSocket::IsValidSocket(Socket) || !FD_ISSET(Socket, a_Write))
- {
- continue;
- }
- if (m_Slots[i].m_Outgoing.empty())
- {
- // Request another chunk of outgoing data:
- if (m_Slots[i].m_Client != nullptr)
- {
- AString Data;
- m_Slots[i].m_Client->GetOutgoingData(Data);
- m_Slots[i].m_Outgoing.append(Data);
- }
- if (m_Slots[i].m_Outgoing.empty())
- {
- // No outgoing data is ready
- if (m_Slots[i].m_State == sSlot::ssWritingRestOut)
- {
- m_Slots[i].m_State = sSlot::ssShuttingDown;
- m_Slots[i].m_Socket.ShutdownReadWrite();
- }
- continue;
- }
- } // if (outgoing data is empty)
-
- if (m_Slots[i].m_State == sSlot::ssRemoteClosed)
- {
- continue;
- }
-
- if (!SendDataThroughSocket(m_Slots[i].m_Socket, m_Slots[i].m_Outgoing))
- {
- int Err = cSocket::GetLastError();
- LOGWARNING("Error %d while writing to client \"%s\", disconnecting. \"%s\"", Err, m_Slots[i].m_Socket.GetIPString().c_str(), GetOSErrorString(Err).c_str());
- m_Slots[i].m_Socket.CloseSocket();
- if (m_Slots[i].m_Client != nullptr)
- {
- m_Slots[i].m_Client->SocketClosed();
- }
- continue;
- }
-
- if (m_Slots[i].m_Outgoing.empty() && (m_Slots[i].m_State == sSlot::ssWritingRestOut))
- {
- m_Slots[i].m_State = sSlot::ssShuttingDown;
- m_Slots[i].m_Socket.ShutdownReadWrite();
- }
-
- // _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]
-}
-
-
-
-
-
-bool cSocketThreads::cSocketThread::SendDataThroughSocket(cSocket & a_Socket, AString & a_Data)
-{
- // Send data in smaller chunks, so that the OS send buffers aren't overflown easily
- while (!a_Data.empty())
- {
- size_t NumToSend = std::min(a_Data.size(), (size_t)1024);
- int Sent = a_Socket.Send(a_Data.data(), NumToSend);
- if (Sent < 0)
- {
- int Err = cSocket::GetLastError();
- if (Err == cSocket::ErrWouldBlock)
- {
- // The OS send buffer is full, leave the outgoing data for the next time
- return true;
- }
- // An error has occured
- return false;
- }
- if (Sent == 0)
- {
- a_Socket.CloseSocket();
- return true;
- }
- a_Data.erase(0, Sent);
- }
- return true;
-}
-
-
-
-
-
-void cSocketThreads::cSocketThread::CleanUpShutSockets(void)
-{
- cCSLock Lock(m_Parent->m_CS);
- for (int i = m_NumSlots - 1; i >= 0; i--)
- {
- switch (m_Slots[i].m_State)
- {
- case sSlot::ssShuttingDown2:
- {
- // The socket has reached the shutdown timeout, close it and clear its slot:
- m_Slots[i].m_Socket.CloseSocket();
- m_Slots[i] = m_Slots[--m_NumSlots];
- break;
- }
- case sSlot::ssShuttingDown:
- {
- // The socket has been shut down for a single thread loop, let it loop once more before closing:
- m_Slots[i].m_State = sSlot::ssShuttingDown2;
- break;
- }
- default: break;
- }
- } // for i - m_Slots[]
-}
-
-
-
-
-void cSocketThreads::cSocketThread::QueueOutgoingData(void)
-{
- cCSLock Lock(m_Parent->m_CS);
- for (int i = 0; i < m_NumSlots; i++)
- {
- if (m_Slots[i].m_Client != nullptr)
- {
- AString Data;
- m_Slots[i].m_Client->GetOutgoingData(Data);
- m_Slots[i].m_Outgoing.append(Data);
- }
- if (m_Slots[i].m_Outgoing.empty())
- {
- // No outgoing data is ready
- if (m_Slots[i].m_State == sSlot::ssWritingRestOut)
- {
- // The socket doesn't want to be kept alive anymore, and doesn't have any remaining data to send.
- // Shut it down and then close it after a timeout, or when the other side agrees
- m_Slots[i].m_State = sSlot::ssShuttingDown;
- m_Slots[i].m_Socket.ShutdownReadWrite();
- }
- continue;
- }
- }
-}
-
-
-
-
diff --git a/src/OSSupport/SocketThreads.h b/src/OSSupport/SocketThreads.h
deleted file mode 100644
index df819468d..000000000
--- a/src/OSSupport/SocketThreads.h
+++ /dev/null
@@ -1,194 +0,0 @@
-
-// SocketThreads.h
-
-// Interfaces to 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
-
-/*
-Additional details:
-When a client wants to terminate the connection, they call the RemoveClient() function. This calls the
-callback one last time to read all the available outgoing data, putting it in the slot's m_OutgoingData
-buffer. Then it marks the slot as having no callback. The socket is kept alive until its outgoing data
-queue is empty, then shutdown is called on it and finally the socket is closed after a timeout.
-If at any time within this the remote end closes the socket, then the socket is closed directly.
-As soon as the socket is closed, the slot is finally removed from the SocketThread.
-The graph in $/docs/SocketThreads States.gv shows the state-machine transitions of the slot.
-*/
-
-
-
-
-
-/** How many clients should one thread handle? (must be less than FD_SETSIZE for your platform) */
-#define MAX_SLOTS 63
-
-
-
-
-
-#pragma once
-
-#include "Socket.h"
-#include "IsThread.h"
-
-
-
-
-// Check MAX_SLOTS:
-#if MAX_SLOTS >= FD_SETSIZE
- #error "MAX_SLOTS must be less than FD_SETSIZE for your platform! (otherwise select() won't work)"
-#endif
-
-
-
-
-
-// fwd:
-class cSocket;
-class cClientHandle;
-
-
-
-
-
-class cSocketThreads
-{
-public:
-
- // Clients of cSocketThreads must implement this interface to be able to communicate
- class cCallback
- {
- public:
- // Force a virtual destructor in all subclasses:
- virtual ~cCallback() {}
-
- /** Called when data is received from the remote party.
- SocketThreads does not care about the return value, others can use it for their specific purpose -
- for example HTTPServer uses it to signal if the connection was terminated as a result of the data received. */
- virtual bool DataReceived(const char * a_Data, size_t a_Size) = 0;
-
- /** Called when data can be sent to remote party
- The function is supposed to *set* outgoing data to a_Data (overwrite) */
- virtual void GetOutgoingData(AString & a_Data) = 0;
-
- /** Called when the socket has been closed for any reason */
- virtual void SocketClosed(void) = 0;
- } ;
-
-
- cSocketThreads(void);
- ~cSocketThreads();
-
- /** Add a (socket, client) pair for processing, data from a_Socket is to be sent to a_Client; returns true if successful */
- bool AddClient(const cSocket & a_Socket, cCallback * a_Client);
-
- /** Remove the associated socket and the client from processing.
- The socket is left to send its last outgoing data and is removed only after all its m_Outgoing is sent
- and after the socket is properly shutdown (unless the remote disconnects before that)
- */
- void RemoveClient(const cCallback * a_Client);
-
- /** 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_Client */
- void Write(const cCallback * a_Client, const AString & a_Data);
-
-private:
-
- class cSocketThread :
- public cIsThread
- {
- typedef cIsThread super;
-
- public:
-
- cSocketThread(cSocketThreads * a_Parent);
- virtual ~cSocketThread();
-
- // All these methods assume parent's m_CS is locked
- bool HasEmptySlot(void) const {return m_NumSlots < MAX_SLOTS; }
- bool IsEmpty (void) const {return m_NumSlots == 0; }
-
- void AddClient (const cSocket & a_Socket, cCallback * a_Client); // Takes ownership of the socket
- bool RemoveClient(const cCallback * a_Client); // Returns true if removed, false if not found
- 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 cCallback * a_Client, const AString & a_Data); // Returns true if client 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
-
- bool IsValid(void) const {return m_ControlSocket2.IsValid(); } // If the Control socket dies, the thread is not valid anymore
-
- private:
-
- cSocketThreads * m_Parent;
-
- // Two ends of the control socket, the first is select()-ed, the second is written to for notifications
- cSocket m_ControlSocket1;
- cSocket m_ControlSocket2;
-
- // Socket-client-dataqueues-state quadruplets.
- // Manipulation with these assumes that the parent's m_CS is locked
- struct sSlot
- {
- /** The socket is primarily owned by this object */
- cSocket m_Socket;
-
- /** The callback to call for events. May be nullptr */
- cCallback * m_Client;
-
- /** If sending writes only partial data, the rest is stored here for another send.
- Also used when the slot is being removed to store the last batch of outgoing data. */
- AString m_Outgoing;
-
- enum eState
- {
- ssNormal, ///< Normal read / write operations
- ssWritingRestOut, ///< The client callback was removed, continue to send outgoing data
- ssShuttingDown, ///< The last outgoing data has been sent, the socket has called shutdown()
- ssShuttingDown2, ///< The shutdown has been done at least 1 thread loop ago (timeout detection)
- ssRemoteClosed, ///< The remote end has closed the connection (and we still have a client callback)
- } m_State;
- } ;
-
- sSlot m_Slots[MAX_SLOTS];
- int m_NumSlots; // Number of slots actually used
-
- virtual void Execute(void) override;
-
- /** Prepares the Read and Write socket sets for select()
- Puts all sockets into the read set, along with m_ControlSocket1.
- Only sockets that have outgoing data queued on them are put in the write set.*/
- void PrepareSets(fd_set * a_ReadSet, fd_set * a_WriteSet, cSocket::xSocket & a_Highest);
-
- /** Reads from sockets indicated in a_Read */
- void ReadFromSockets(fd_set * a_Read);
-
- /** Writes to sockets indicated in a_Write */
- void WriteToSockets (fd_set * a_Write);
-
- /** Sends data through the specified socket, trying to fill the OS send buffer in chunks.
- Returns true if there was no error while sending, false if an error has occured.
- Modifies a_Data to contain only the unsent data. */
- bool SendDataThroughSocket(cSocket & a_Socket, AString & a_Data);
-
- /** Removes those slots in ssShuttingDown2 state, sets those with ssShuttingDown state to ssShuttingDown2 */
- void CleanUpShutSockets(void);
-
- /** Calls each client's callback to retrieve outgoing data for that client. */
- void QueueOutgoingData(void);
- } ;
-
- typedef std::list<cSocketThread *> cSocketThreadList;
-
-
- cCriticalSection m_CS;
- cSocketThreadList m_Threads;
-} ;
-
-
-
-