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 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 ReadHeadCallback(IAsyncResult ar)
{
ReadState readState = (ReadState)ar.AsyncState;
try
{
Socket handler = readState.workSocket;
if (!handler.Connected)
{
LOG.InfoFormat("({0}) Connection closed!", Name);
return;
}
int bytesRead = handler.EndReceive(ar);
if (bytesRead > 0)
{
ScadaTCPHeader header = InstanceHeader?.Invoke();
if (header == null)
{
LOG.ErrorFormat("({0}) Not found instance ScadaHeader class", Name);
return;
}
header.bytes = readState.HeaderBytes;
header.RemoteSocket = handler;
header.Decode();
header.SessionId = readState.sessionId;
readState.header = header;
header.Debug();
header.Info();
LOG.InfoFormat("({2}) Read header from:{0},body len:{1}", handler.RemoteEndPoint, header.bodyLength, Name);
if (PrintReceiveHex)
{
PrintUtils.PrintHex(header.bytes);
}
if (header.bodyLength > 0)
{
readState.BodyBytes = new byte[header.bodyLength];
handler.BeginReceive(readState.BodyBytes, 0, header.bodyLength, SocketFlags.None, new AsyncCallback(ReadCallback), readState);
}
else
{
MainNotify?.Invoke(header, null);
ResetState(handler, header);
}
}
}
catch (Exception e)
{
ReadException(e, readState);
}
}
public void ReadCallback(IAsyncResult ar)
{
// Retrieve the state object and the handler socket
// from the asynchronous state object.
ReadState readState = (ReadState)ar.AsyncState;
try
{
Socket handler = readState.workSocket;
// Read data from the client socket.
int bytesRead = handler.EndReceive(ar);
ScadaTCPHeader header = readState.header;
if (bytesRead > 0)
{
if (PrintReceiveHex)
{
PrintUtils.PrintHex(readState.BodyBytes);
}
ScadaTCPBody body = header.InstanceBody();
body.BodyBytes = readState.BodyBytes;
body.Decode();
body.Debug();
body.Info();
MainNotify?.Invoke(header, body);
ScadaTCPMsg sendMsg = body.GetSendMsg();
if (sendMsg != null)
{
Send(header.SessionId, sendMsg, sendMsg.CloseClient);
}
ResetState(handler, header);
}
}
catch (Exception e)
{
ReadException(e, readState);
}
}