private void PrepareDataConnections(IAsyncResult result, DataConnectionExecutorState state)
{
if (state.ClientDataConnection.DataConnectionType == DataConnectionType.Active)
{
_serverDataConnection = new Connection(state.DataConnetionListener.EndAcceptTcpClient(result));
if (state.ServerConnection.DataEncryptionEnabled)
{
_serverDataConnection.SetUpSecureConnectionAsClient();
}
_clientDataConnection.Connect();
if (state.ClientConnection.DataEncryptionEnabled)
{
_clientDataConnection.SetUpSecureConnectionAsServer();
}
}
else if (state.ClientDataConnection.DataConnectionType == DataConnectionType.Passive)
{
_clientDataConnection = new Connection(state.DataConnetionListener.EndAcceptTcpClient(result));
if (state.ClientConnection.DataEncryptionEnabled)
{
_clientDataConnection.SetUpSecureConnectionAsServer();
}
// _serverDataConnection.Connect();
if (state.ServerConnection.DataEncryptionEnabled)
{
_serverDataConnection.SetUpSecureConnectionAsClient();
}
}
else
{
Logger.Log.Error(String.Format("Not implemented data connection type {0} ",
state.ClientDataConnection.DataConnectionType));
}
}
public void DoDataConnectionOperation(IAsyncResult result)
{
DataConnectionExecutorState state = result.AsyncState as DataConnectionExecutorState;
if (state == null)
{
return;
}
_clientDataConnection = state.ClientDataConnection.Connection;
_serverDataConnection = state.ServerDataConnection.Connection;
lock (state.ClientConnection.ConnectionOperationLocker)
{
try
{
PrepareDataConnections(result, state);
}
catch (Exception ex)
{
Logger.Log.Error("Error starting data connection operation", ex);
return;
}
try
{
// Бесконечный цикл, работает до появления в одном из каналов данных для считывания
// таким образом проверяется направление передачи
while (true)
{
if (_serverDataConnection.DataAvailable)
{
_serverDataConnection.CopyDataTo(_clientDataConnection);
break;
}
if (_clientDataConnection.DataAvailable)
{
_clientDataConnection.CopyDataTo(_serverDataConnection);
break;
}
Thread.Sleep(150);
}
}
catch (Exception ex)
{
Logger.Log.Error("Data connection closed when copy operation was running", ex);
}
_serverDataConnection.CloseConnection();
IFtpMessage command = state.ServerConnection.GetMessage();
if (command != null)
{
state.ClientConnection.SendMessage(command);
}
_clientDataConnection.CloseConnection();
}
}