private void CheckForThreadsToPurge()
{
ArrayList deleteList = new ArrayList();
// Check for any clients SocketListeners that are to be
// deleted and put them in a separate list in a thread safe fashion.
lock (m_socketListenersList)
{
foreach (TCPSocketListener socketListener in m_socketListenersList)
{
if (socketListener.IsMarkedForDeletion())
{
ORTLog.LogD(string.Format("PurgingThread: StopSocketListener {0}", socketListener.ToString()));
deleteList.Add(socketListener);
socketListener.StopSocketListener();
}
}
// Delete all the client SocketConnection ojects which are
// in marked for deletion and are in the delete list.
for (int i = 0; i < deleteList.Count; ++i)
{
m_socketListenersList.Remove(deleteList[i]);
}
}
deleteList = null;
}
protected override void OnStart(string[] args)
{
var appSettings = ConfigurationManager.AppSettings;
var LogFlags = ConfigurationManager.GetSection("LogFlags") as NameValueCollection;
string debugFilename = @"C:\cygwin64\home\listdog\logs\ort_debug.txt";
string sessionFilename = @"C:\cygwin64\home\listdog\logs\ort_session.txt";
if (LogFlags != null)
{
if (LogFlags["LogDebug"] != null &&
string.Compare(LogFlags["LogDebug"].ToString(), "1", true) == 0)
{
ORTLog.EnableDebug = true;
}
if (LogFlags["LogSession"] != null &&
string.Compare(LogFlags["LogSession"].ToString(), "1", true) == 0)
{
ORTLog.EnableSession = true;
}
if (LogFlags["DebugFilename"] != null)
{
debugFilename = LogFlags["DebugFilename"].ToString();
}
if (LogFlags["SessionFilename"] != null)
{
sessionFilename = LogFlags["SessionFilename"].ToString();
}
}
ORTLog.Open(debugFilename, sessionFilename);
var TcpFlags = ConfigurationManager.GetSection("LogFlags") as NameValueCollection;
int deviceServerPort = 3333;
int commandServerPort = 8888;
if (TcpFlags != null)
{
if (TcpFlags["ORTDeviceServerPort"] != null)
{
deviceServerPort = int.Parse(TcpFlags["ORTDeviceServerPort"].ToString());
}
if (TcpFlags["ORTCommandServerPort"] != null)
{
commandServerPort = int.Parse(TcpFlags["ORTCommandServerPort"].ToString());
}
}
ORTLog.LogD("Service Started");
m_deviceServer = new DeviceServer(IPAddress.Any, deviceServerPort);
m_deviceServer.StartServer();
m_commandServer = new CommandServer(IPAddress.Any, commandServerPort);
m_commandServer.StartServer();
}
protected override void OnStop()
{
m_deviceServer.StopServer();
m_deviceServer = null;
m_commandServer.StopServer();
m_commandServer = null;
ORTLog.LogD("Service Stopped");
ORTLog.Close();
}
public static bool Add(string key, DeviceListener s)
{
try
{
return(DeviceListeners.TryAdd(key, s));
}
catch (Exception e)
{
ORTLog.LogS(string.Format("SharedMem Exception in Add {0}", e.ToString()));
return(false);
}
}
public static bool Remove(string key)
{
DeviceListener s;
try
{
return(DeviceListeners.TryRemove(key, out s));
}
catch (Exception e)
{
ORTLog.LogS(string.Format("SharedMem Exception in Remove {0}", e.ToString()));
return(false);
}
}
public int Send(byte[] buffer)
{
int ret = 0;
try
{
ret = m_clientSocket.Send(buffer);
}
catch (Exception e)
{
ORTLog.LogS(string.Format("ORTDevice Exception in Send {0}", e.ToString()));
}
return(ret);
}
/// <summary>
/// Thread method for purging Client Listeneres that are marked for
/// deletion (i.e. clients with socket connection closed). This thead
/// is a low priority thread and sleeps for 10 seconds and then check
/// for any client SocketConnection obects which are obselete and
/// marked for deletion.
/// </summary>
private void PurgingThreadStart()
{
ORTLog.LogD("PurgingThread: Start");
while (!m_stopPurging)
{
CheckForThreadsToPurge();
// Wait 10 seconds, but check for shutdown every 100ms
int sleep = 10000;
while (!m_stopPurging && sleep > 0)
{
Thread.Sleep(100);
sleep -= 100;
}
}
ORTLog.LogD("PurgingThread: Stop");
}
protected override void ServerThreadStart()
{
Socket clientSocket = null;
TCPSocketListener socketListener = null;
while (!m_stopServer)
{
try
{
clientSocket = m_server.AcceptSocket();
}
catch (Exception)
{
// This happens when we shutdown the servive
continue;
}
try
{
ORTLog.LogS(String.Format("ORTCommand: Connection made {0}", clientSocket.RemoteEndPoint));
}
catch (Exception e)
{
ORTLog.LogS(string.Format("ORTCommand Exception {0}", e.ToString()));
continue;
}
// Create a SocketListener object for the client.
socketListener = new CommandListener(clientSocket);
// Add the socket listener to an array list in a thread safe fashion.
lock (m_socketListenersList)
{
m_socketListenersList.Add(socketListener);
}
// Start communicating with the client in a different thread.
socketListener.StartSocketListener();
}
}
public void StartSocketListener()
{
if (m_clientSocket == null)
{
m_markedForDeletion = true;
return;
}
try
{
m_remoteEndPoint = m_clientSocket.RemoteEndPoint.ToString();
}
catch (Exception e)
{
ORTLog.LogS(string.Format("TCPSocketListener Exception {0}", e.ToString()));
m_markedForDeletion = true;
return;
}
m_clientListenerThread = new Thread(new ThreadStart(SocketListenerThreadStart));
m_clientListenerThread.Start();
}
protected override void SocketListenerThreadStart()
{
int size = 0;
Byte[] byteBuffer = new Byte[1024];
try { m_clientSocket.ReceiveTimeout = 500; } catch (Exception) { }
while (!m_stopClient)
{
try
{
size = m_clientSocket.Receive(byteBuffer);
if (size == 0)
{
// Indicates the remote side closed the connection
break;
}
}
catch (SocketException e)
{
if (e.ErrorCode == WSAETIMEDOUT)
{
// Timeout while waiting for shutdown
continue;
}
else
{
ORTLog.LogS(string.Format("ORTCommand Exception in Receive {0}", e.ToString()));
break;
}
}
catch (Exception e)
{
ORTLog.LogS(string.Format("ORTCommand Exception in Receive {0}", e.ToString()));
break;
}
// Get a string representation from the socket buffer
string data = Encoding.ASCII.GetString(byteBuffer, 0, size);
if (!IsValidIpsData(data))
{
ORTLog.LogS(String.Format("ORTCommand: Invalid data={0}", CleanString(data)));
break;
}
string customer = "";
string device = "";
string command = "";
try
{
// Parse the customer+device
customer = data.Split(null)[1];
device = data.Split(null)[2];
// Parse the command - hacky :/
int i = data.IndexOf(" ", data.IndexOf(" ", data.IndexOf(" ") + 1) + 1) + 1;
command = data.Substring(i);
// Remove the carriage return and/or line feed
command = Regex.Replace(command, @"\r\n?|\n", "");
}
catch (Exception)
{
ORTLog.LogS(String.Format("ORTCommand: Invalid data={0}", CleanString(data)));
break;
}
ORTLog.LogS(string.Format("ORTCommand: customer={0} device={1} command={2}", customer, device, command));
string key = GetKey(customer, device);
// Get the cooresponding socket and send the command
DeviceListener d = SharedMem.Get(key);
if (d != null)
{
try
{
if (d.Send(Encoding.ASCII.GetBytes(command)) == 0)
{
break;
}
}
catch (Exception e)
{
ORTLog.LogS(string.Format("ORTCommand Exception {0}", e.ToString()));
break;
}
}
else
{
ORTLog.LogS(string.Format("ORTCommand: customer device combination not found: {0}", key));
}
}
ORTLog.LogS(String.Format("ORTCommand: Connection dropped {0}", this.ToString()));
try { m_clientSocket.Shutdown(SocketShutdown.Both); } catch (Exception) { }
m_clientSocket.Close();
m_markedForDeletion = true;
}
protected override void SocketListenerThreadStart()
{
Byte[] byteBuffer = new Byte[1024];
int size = 0;
try
{
size = m_clientSocket.Receive(byteBuffer);
}
catch (Exception e)
{
ORTLog.LogS(string.Format("ORTDevice Exception in Receive {0}", e.ToString()));
m_clientSocket.Close();
m_markedForDeletion = true;
return;
}
string data = Encoding.ASCII.GetString(byteBuffer, 0, size);
if (!IsValidIpsData(data))
{
ORTLog.LogS(String.Format("ORTDevice: Invalid data={0}", CleanString(data)));
ORTLog.LogS(String.Format("ORTDevice: Connection dropped {0}", this.ToString()));
try { m_clientSocket.Shutdown(SocketShutdown.Both); } catch (Exception) { }
m_clientSocket.Close();
m_markedForDeletion = true;
return;
}
string customer = "";
string device = "";
string ipAddr = "";
try
{
// Parse the customer+device
customer = data.Split(null)[1];
device = data.Split(null)[2];
ipAddr = data.Split(null)[3];
}
catch (Exception)
{
ORTLog.LogS(String.Format("ORTDevice: Invalid data={0}", CleanString(data)));
ORTLog.LogS(String.Format("ORTDevice: Connection dropped {0}", this.ToString()));
try { m_clientSocket.Shutdown(SocketShutdown.Both); } catch (Exception) { }
m_clientSocket.Close();
m_markedForDeletion = true;
return;
}
string key = GetKey(customer, device);
// Check if this key already exists
DeviceListener d = SharedMem.Get(key);
if (d != null)
{
// Detected duplicate
ORTLog.LogS(String.Format("ORTDevice: Detected duplicate customer={0} device={1}", customer, device));
// Remove existing key
ORTLog.LogS(String.Format("ORTDevice: Remove listener for customer={0} device={1}", customer, device));
SharedMem.Remove(key);
// Shutdown the existing (zombie) listener
d.StopSocketListener();
}
ORTLog.LogS(String.Format("ORTDevice: Add listener for customer={0} device={1} localIpAddr={2}", customer, device, ipAddr));
if (!SharedMem.Add(key, this))
{
ORTLog.LogS(String.Format("ORTDevice: Unable to add key={0}", key));
ORTLog.LogS(String.Format("ORTDevice: Connection dropped {0}", this.ToString()));
try { m_clientSocket.Shutdown(SocketShutdown.Both); } catch (Exception) { }
m_clientSocket.Close();
m_markedForDeletion = true;
return;
}
// Block forever waiting for the connection to terminate
while (!m_stopClient)
{
bool poll = false;
try
{
poll = m_clientSocket.Poll(100000, SelectMode.SelectRead); // 100ms
}
catch (Exception e)
{
ORTLog.LogS(string.Format("ORTDevice Exception in Poll {0}", e.ToString()));
break;
}
if (poll)
{
// Connection has been closed, reset, or terminated
break;
}
}
if (SharedMem.Remove(key))
{
ORTLog.LogS(String.Format("ORTDevice: Removed listener for customer={0} device={1}", customer, device));
}
ORTLog.LogS(String.Format("ORTDevice: Connection dropped {0}", this.ToString()));
try { m_clientSocket.Shutdown(SocketShutdown.Both); } catch (Exception) { }
m_clientSocket.Close();
m_markedForDeletion = true;
}