/*
* SetNfcMode
* ----------
* Configure the reader's NFC interface for NFC Forum Tag emulation
*/
void SetNfcMode(int type, bool silent)
{
string s;
if ((type == 2) || (type == 4))
{
s = String.Format("Failed to activate NFC Forum type {0} Tag emulation", type);
}
else
{
s = "Failed to leave NFC Tag emulation mode";
}
/* 1st open a direct connection to the reader */
/* ------------------------------------------ */
SCardChannel channel = new SCardChannel(reader);
channel.ShareMode = SCARD.SHARE_DIRECT;
channel.Protocol = 0;
if (!channel.Connect())
{
Trace.WriteLine("Connect error " + channel.LastError + " (" + channel.LastErrorAsString + ")");
if (!silent)
{
MessageBox.Show("Direct connection to the reader has failed with error '" + channel.LastErrorAsString + "'.",
s,
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation);
}
return;
}
/* 2nd send a proprietary command within a SCardControl */
/* ---------------------------------------------------- */
byte[] command = null;
switch (type)
{
/* Command to start the NFC card emulation */
/* --------------------------------------- */
case 2:
command = new byte[] { 0x83, /* SPROX_NFC_FUNC */
0x10, /* Control card emulation mode */
0x02, /* Select NFC Forum type 2 Tag emulation */
0x11 /* First activation */
};
break;
case 4:
command = new byte[] { 0x83, /* SPROX_NFC_FUNC */
0x10, /* Control card emulation mode */
0x04, /* Select NFC Forum type 4 Tag emulation */
0x11 /* First activation */
};
break;
/* Command to stop the NFC card emulation */
/* -------------------------------------- */
case 0:
command = new byte[] { 0x83, /* SPROX_NFC_FUNC */
0x10, /* Control card emulation mode */
0x00, /* Stop card emulation */
0x00 };
break;
default:
MessageBox.Show("Internal error.");
return;
}
Trace.WriteLine("< " + new CardBuffer(command).AsString(" "));
byte[] response = channel.Control(command);
if ((response == null) || (response.Length == 0))
{
/* No response -> SCardControl error */
/* --------------------------------- */
Trace.WriteLine("Control error " + channel.LastError + " (" + channel.LastErrorAsString + ")");
channel.Disconnect();
if (!silent)
{
MessageBox.Show("The command has not been delivered to the reader, error is '" + channel.LastErrorAsString + "'.",
s,
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation);
}
return;
}
Trace.WriteLine("> " + new CardBuffer(response).AsString(" "));
if (response[0] != 0)
{
/* Error code returned by the reader */
/* --------------------------------- */
channel.Disconnect();
if (!silent)
{
MessageBox.Show("The command has not been executed by the reader, error code is '-" + response[0] + "'.",
s,
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation);
}
emulation_running = false;
return;
}
/* Drive the LEDs and buzzer */
/* ------------------------- */
if (type > 0)
{
emulation_running = true;
channel.Leds(1, 1, 1);
channel.Buzzer(100);
}
else
{
emulation_running = false;
channel.LedsDefault();
channel.BuzzerDefault();
}
/* Done */
/* ---- */
channel.Disconnect();
ShowStatus();
}