internal void Start()
{
if (-1 == _port)
{
return;
}
try
{
IPAddress addr = IPAddress.Loopback;
_listenSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
#if (DEBUG) // Check an option that provides for listening on all the network interfaces, not only loopback (DEBUG builds only)
if (!Core.SettingStore.ReadBool("RemoteControl", "LoopbackInterfaceOnly", true))
{
addr = IPAddress.Any;
}
#endif
if (_port != 0)
{
_listenSocket.Bind(new IPEndPoint(addr, _port));
}
else
{
_storePort = true;
while (true)
{
_port = generateRandomPort();
try
{
_listenSocket.Bind(new IPEndPoint(IPAddress.Loopback, _port));
break;
}
catch (SocketException ex)
{
if (ex.ErrorCode != 10048) // WSAEADDRINUSE
{
return;
}
}
}
}
_listenSocket.Listen((int)SocketOptionName.MaxConnections);
_stop = Winsock.WSACreateEvent();
Winsock.WSAResetEvent(_stop);
_mainThread = new Thread(new ThreadStart(Listener));
_mainThread.Name = _threadName;
_mainThread.Start();
_mainThread.Priority = ThreadPriority.BelowNormal;
}
catch
{
Winsock.WSASetEvent(_stop);
_port = -1;
throw;
}
return;
}
private void Listener()
{
IntPtr socketEvent = Winsock.WSACreateEvent();
IntPtr[] allEvents = { _stop, socketEvent };
IntPtr handle = _listenSocket.Handle;
Winsock.WSAEventSelect(handle, socketEvent, Winsock.FD_ACCEPT);
while (true)
{
try
{
uint res = Winsock.WSAWaitForMultipleEvents(2, allEvents, 0 /*false*/, Winsock.WSA_INFINITE, 1 /*true*/);
if (res == Winsock.WSA_WAIT_EVENT_0)
{
Trace.WriteLine("[RCS] Event 0 (STOP) signalled");
break;
}
else if (res == Winsock.WSA_WAIT_EVENT_0 + 1)
{
Winsock.WSAResetEvent(socketEvent);
Trace.WriteLine("[RCS] Event 1 (ACCEPT) signalled");
Socket cs = _listenSocket.Accept();
Winsock.WSAEventSelect(cs.Handle, socketEvent, 0);
cs.Blocking = true;
Trace.WriteLine("[RCS] Client accepted at socket " + cs.Handle.ToString());
ThreadPool.QueueUserWorkItem(_onAccept, cs);
}
else
{
Trace.WriteLine("[RCS] Event " + res.ToString() + " (?) signalled");
}
}
catch (Exception ex)
{
Trace.WriteLine("[RCS] Accept exception: " + ex.Message);
// If not sopped: sleep and try again
if (Winsock.WSAWaitForMultipleEvents(1, new IntPtr[] { _stop }, 1 /*true*/, 0, 0 /*false*/) != Winsock.WSA_WAIT_EVENT_0)
{
Trace.WriteLine("[RCS] It is not stop!");
Thread.Sleep(100);
}
else
{
Trace.WriteLine("[RCS] It is stop, exiting.");
// Stopped: exit
break;
}
}
}
try
{
Trace.WriteLine("[RCS] Closing main socket " + handle.ToString() + " ...");
_listenSocket.Close();
Trace.WriteLine("[RCS] Main socket " + handle.ToString() + " closed.");
}
catch (Exception ex)
{
Trace.WriteLine("[RCS] Main socket closing exception: " + ex.Message);
}
finally
{
_listenSocket = null;
}
Winsock.WSACloseEvent(socketEvent);
}
