internal IAsyncResult BeginExecute(int timeout, AsyncCallback cb, object state)
{
SetProgress(true);
GetDC_SO stateObj = null;
try
{
stateObj = new GetDC_SO(timeout, cb, state);
if (_passiveMode)
{
_cc.BeginSendCommandEx(timeout,
"PASV",
new AsyncCallback(this.GetDC_EndCmd),
stateObj);
}
else
{
IPEndPoint ep = GetLocalEndPoint();
stateObj.DC = new FtpDataConnectionInbound(_client, ep);
stateObj.DC.BeginPrepare(timeout,
_cc.UsedSocket,
new AsyncCallback(Prepare_End),
stateObj);
}
}
finally
{
SetProgress(false);
}
return(stateObj);
}
internal FtpDataConnection EndExecute(IAsyncResult ar)
{
AsyncBase.VerifyAsyncResult(ar, typeof(GetDC_SO));
HandleAsyncEnd(ar, true);
GetDC_SO stateObj = (GetDC_SO)ar;
return(stateObj.DC);
}
void Prepare_End(IAsyncResult ar)
{
GetDC_SO stateObj = (GetDC_SO)ar.AsyncState;
try
{
stateObj.UpdateContext();
stateObj.DC.EndPreapre(ar);
stateObj.Cmd = GetPortCmd(stateObj.DC.LocalEndPoint);
_cc.BeginSendCommandEx(stateObj.Timeout,
stateObj.Cmd,
new AsyncCallback(this.GetDC_EndCmd),
stateObj);
}
catch (Exception e)
{
stateObj.Exception = e;
stateObj.SetCompleted();
}
}
void GetDC_EndCmd(IAsyncResult ar)
{
GetDC_SO stateObj = (GetDC_SO)ar.AsyncState;
try
{
stateObj.UpdateContext();
FtpResponse response = _cc.EndSendCommandEx(ar);
if (_passiveMode)
{
if (false == response.IsCompletionReply)
{
NSTrace.WriteLineError("PASV: " + response.ToString());
stateObj.Exception = new FtpErrorException("Error while configuring data connection.", response);
}
else
{
IPEndPoint ep = GetPasvEndPoint(response);
stateObj.DC = new FtpDataConnectionOutbound(_client, ep);
}
}
else
{
if (false == response.IsCompletionReply)
{
stateObj.DC.Dispose();
stateObj.DC = null;
NSTrace.WriteLineError(stateObj.Cmd + ": " + response.ToString());
stateObj.Exception = new FtpErrorException("Error while configure data connection.", response);
}
}
}
catch (Exception e)
{
stateObj.Exception = e;
}
stateObj.SetCompleted();
}
