public void Send(string sessionId, string msg, bool closeClient)
{
if (string.IsNullOrEmpty(sessionId))
{
throw new Exception("Session id is null!");
}
ScadaClient client = ScadaTCPClients.GetClient(sessionId);
if (client == null)
{
throw new Exception("Not found client by session:" + sessionId);
}
LOG.DebugFormat("({2}) Send {0} bytes to {1}", msg.Length, client.socket.RemoteEndPoint, Name);
if (PrintSendHex)
{
PrintUtils.PrintHex(msg);
}
SendState state = new SendState();
state.CloseClient = closeClient;
state.RemoteSocket = client.socket;
state.Client = client;
state.MsgBits = Encoding.ASCII.GetBytes(msg);
// Begin sending the data to the remote device.
client.socket.BeginSend(state.MsgBits, 0, state.MsgBits.Length, 0,
new AsyncCallback(SendCallback), state);
}
public void Send(string sessionId, ScadaTCPMsg msg, bool closeClient)
{
try
{
// Convert the string data to byte data using ASCII encoding.
// byte[] byteData = Encoding.ASCII.GetBytes(data);
if (string.IsNullOrEmpty(sessionId))
{
throw new Exception("Session id is null!");
}
ScadaClient client = ScadaTCPClients.GetClient(sessionId);
if (client == null)
{
throw new Exception("Not found client by session:" + sessionId);
}
LOG.DebugFormat("({2}) Send {0} bytes to {1}", msg.MsgBytes.Length, client.socket.RemoteEndPoint, Name);
if (PrintSendHex)
{
PrintUtils.PrintHex(msg.MsgBytes);
}
SendState state = new SendState();
state.CloseClient = closeClient;
state.RemoteSocket = client.socket;
state.Client = client;
state.Msg = msg;
// Begin sending the data to the remote device.
client.socket.BeginSend(msg.MsgBytes, 0, msg.MsgBytes.Length, 0,
new AsyncCallback(SendCallback), state);
}
catch (Exception e)
{
ReadException(e, null);
}
}
public void AcceptCallback(IAsyncResult ar)
{
// Create the state object.
ReadState readState = new ReadState();
try
{
// Signal the main thread to continue.
allDone.Set();
// Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
string sessionId = ScadaTCPClients.AssignSessionId();
LOG.InfoFormat("({2}) New client:{0},sessionId:{1}", handler.RemoteEndPoint, sessionId, Name);
ScadaClient client = new ScadaClient();
client.socket = handler;
client.SessionId = sessionId;
ScadaTCPClients.Add(client.SessionId, client);
LOG.InfoFormat("({1}) Clients count:{0}", ScadaTCPClients.ClientCount, Name);
readState.workSocket = handler;
readState.sessionId = client.SessionId;
readState.HeaderBytes = new byte[HeaderLength];
handler.BeginReceive(readState.HeaderBytes, 0, HeaderLength, SocketFlags.None, new AsyncCallback(ReadHeadCallback), readState);
}
catch (Exception e)
{
ReadException(e, readState);
}
}
private void SendCallback(IAsyncResult ar)
{
// Retrieve the socket from the state object.
SendState handler = (SendState)ar.AsyncState;
try
{
Socket socket = handler.RemoteSocket;
// Complete sending the data to the remote device.
int bytesSent = socket.EndSend(ar);
LOG.DebugFormat("({2}) Sent {0} bytes to {1} finish!", bytesSent, socket.RemoteEndPoint, Name);
SendFinish?.Invoke(handler);
if (handler.CloseClient)
{
ScadaTCPClients.Close(handler.Client.SessionId);
LOG.InfoFormat("({1}) Client :{0} closed!", handler.Client.SessionId, Name);
}
}
catch (Exception e)
{
WriteException(e, handler);
}
}