/**m* SCardChannel/Transmit
*
* NAME
* SCardChannel.Transmit()
*
* SYNOPSIS
* bool Transmit()
* RAPDU Transmit(CAPDU capdu)
* bool Transmit(CAPDU capdu, out RAPDU rapdu)
* void Transmit(CAPDU capdu, TransmitDoneCallback callback)
*
* DESCRIPTION
* Sends a command APDU (CAPDU) to the connected card, and retrieves its response APDU (RAPDU)
*
* SOURCE
*
* SCardChannel card = new SCardChannel( ... reader ... );
* if (!card.Connect( SCARD.PROTOCOL_T0|SCARD.PROTOCOL_T1 ))
* {
* // handle error
* }
*
*
* // Example 1
* // ---------
*
* card.Command = new CAPDU("00 A4 00 00 02 3F 00");
* if (!card.Transmit())
* {
* // handle error
* }
* MessageBox.Show("Card answered: " + card.Response.AsString(" "));
*
*
* // Example 2
* // ---------
*
* RAPDU response = card.Transmit(new CAPDU("00 A4 00 00 02 3F 00")))
* if (response == null)
* {
* // handle error
* }
* MessageBox.Show("Card answered: " + response.AsString(" "));
*
*
* // Example 3
* // ---------
*
* CAPDU command = new CAPDU("00 A4 00 00 02 3F 00");
* RAPDU response = new RAPDU();
* if (!card.Transmit(command, out response))
* {
* // handle error
* }
* MessageBox.Show("Card answered: " + response.AsString(" "));
*
*
* // Example 4
* // ---------
*
* // In this example the Transmit is performed by a background thread
* // We supply a delegate so the main class (window/form) will be notified
* // when Transmit will return
*
* delegate void OnTransmitDoneInvoker(RAPDU response);
*
* void OnTransmitDone(RAPDU response)
* {
* // Ensure we're back in the context of the main thread (application's message pump)
* if (this.InvokeRequired)
* {
* this.BeginInvoke(new OnTransmitDoneInvoker(OnTransmitDone), response);
* return;
* }
*
* if (response == null)
* {
* // handle error
* }
*
* MessageBox.Show("Card answered: " + response.AsString(" "));
* }
*
* card.Transmit(new CAPDU("00 A4 00 00 02 3F 00"), new SCardChannel.TransmitDoneCallback(OnTransmitDone));
*
*
* SEE ALSO
* SCardChannel.Connect
* SCardChannel.Transmit
* SCardChannel.Command
* SCardChannel.Response
*
**/
#region Transmit
public virtual bool Transmit()
{
uint rsp_length = 32 * 1024;
byte[] rsp_buffer = new byte[rsp_length];
uint rc;
IntPtr SendPci = IntPtr.Zero;
switch (_active_protocol)
{
case SCARD.PROTOCOL_T0:
SendPci = SCARD.PCI_T0();
break;
case SCARD.PROTOCOL_T1:
SendPci = SCARD.PCI_T1();
break;
case SCARD.PROTOCOL_RAW:
SendPci = SCARD.PCI_RAW();
break;
default:
break;
}
_rapdu = null;
Trace.WriteLine("Transmit << " + _capdu.AsString());
rc = SCARD.Transmit(_hCard,
SendPci,
_capdu.GetBytes(),
(uint)_capdu.Length,
IntPtr.Zero, /* RecvPci is likely to remain NULL */
rsp_buffer,
ref rsp_length);
if (rc != SCARD.S_SUCCESS)
{
Trace.WriteLine("Transmit : " + rc);
_last_error = rc;
return(false);
}
_rapdu = new RAPDU(rsp_buffer, (int)rsp_length);
Trace.WriteLine("Transmit >> " + _rapdu.AsString());
return(true);
}
