248 lines
9.4 KiB
Rust
248 lines
9.4 KiB
Rust
#![no_std]
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extern crate alloc;
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extern crate lang_items;
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extern crate libtock_drivers;
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use core::fmt::Write;
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use libtock_drivers::console::Console;
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libtock_core::stack_size! {0x4000}
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#[cfg(not(feature = "with_nfc"))]
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mod example {
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use super::{Console, Write};
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pub fn nfc(console: &mut Console) {
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writeln!(console, "NFC feature flag is missing!").unwrap();
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}
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}
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#[cfg(feature = "with_nfc")]
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mod example {
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use super::{Console, Write};
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use libtock_core::result::CommandError;
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use libtock_drivers::nfc::{NfcTag, RecvOp};
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use libtock_drivers::result::{FlexUnwrap, TockError};
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use libtock_drivers::timer;
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use libtock_drivers::timer::{Timer, Timestamp};
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#[derive(Copy, Clone, Debug, PartialEq)]
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#[allow(clippy::upper_case_acronyms)]
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enum ReturnCode {
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/// Operation completed successfully
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SUCCESS,
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/// Generic failure condition
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FAIL,
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/// Underlying system is busy; retry
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EBUSY,
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/// The component is powered down
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EOFF,
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/// An invalid parameter was passed
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EINVAL,
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/// Operation canceled by a call
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ECANCEL,
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/// Memory required not available
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ENOMEM,
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/// Operation or command is unsupported
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ENOSUPPORT,
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}
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impl From<isize> for ReturnCode {
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fn from(original: isize) -> ReturnCode {
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match original {
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0 => ReturnCode::SUCCESS,
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-1 => ReturnCode::FAIL,
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-2 => ReturnCode::EBUSY,
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-4 => ReturnCode::EOFF,
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-6 => ReturnCode::EINVAL,
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-8 => ReturnCode::ECANCEL,
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-9 => ReturnCode::ENOMEM,
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_ => ReturnCode::ENOSUPPORT,
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}
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}
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}
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/// Helper function to write on console the received packet.
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fn print_rx_buffer(buf: &mut [u8]) {
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if let Some((last, bytes)) = buf.split_last() {
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let mut console = Console::new();
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write!(console, "RX:").unwrap();
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for byte in bytes {
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write!(console, " {:02x?}", byte).unwrap();
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}
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writeln!(console, " {:02x?}", last).unwrap();
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console.flush();
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}
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}
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/// Function to identify the time elapsed for a transmission request.
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fn bench_transmit(
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console: &mut Console,
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timer: &Timer,
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title: &str,
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mut buf: &mut [u8],
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) -> ReturnCode {
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let amount = buf.len();
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let start = Timestamp::<f64>::from_clock_value(timer.get_current_clock().flex_unwrap());
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match NfcTag::transmit(&mut buf, amount) {
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Ok(_) => (),
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Err(TockError::Command(CommandError {
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return_code: -8, /* ECANCEL: No Field*/
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..
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})) => return ReturnCode::ECANCEL,
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Err(_) => writeln!(Console::new(), " -- tx error!").unwrap(),
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}
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let end = Timestamp::<f64>::from_clock_value(timer.get_current_clock().flex_unwrap());
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let elapsed = (end - start).ms();
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writeln!(
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console,
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"{}\n{:.2} ms elapsed for {} bytes ({:.2} kbit/s)",
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title,
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elapsed,
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amount,
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(amount as f64) / elapsed * 8.
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)
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.unwrap();
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console.flush();
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ReturnCode::SUCCESS
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}
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fn receive_packet(console: &mut Console, mut buf: &mut [u8; 256]) -> ReturnCode {
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match NfcTag::receive(&mut buf) {
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Ok(RecvOp {
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recv_amount: amount,
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..
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}) => {
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if amount <= buf.len() {
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print_rx_buffer(&mut buf[..amount]);
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}
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}
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Err(TockError::Command(CommandError { return_code, .. })) => return return_code.into(),
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Err(_) => {
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writeln!(console, " -- RX Err").unwrap();
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return ReturnCode::ECANCEL;
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}
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}
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ReturnCode::SUCCESS
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}
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fn transmit_reply(mut console: &mut Console, timer: &Timer, buf: &[u8]) -> ReturnCode {
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let mut return_code = ReturnCode::SUCCESS;
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match buf[0] {
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0xe0 /* RATS */=> {
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let mut answer_to_select = [0x05, 0x78, 0x80, 0xB1, 0x00];
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return_code = bench_transmit(&mut console, &timer, "TX: ATS", &mut answer_to_select);
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}
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0xc2 /* DESELECT */ => {
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// Ignore the request
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let mut command_error = [0x6A, 0x81];
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return_code = bench_transmit(&mut console, &timer, "TX: DESELECT", &mut command_error);
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}
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0x02 | 0x03 /* APDU Prefix */ => match buf[2] {
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// If the received packet is applet selection command (FIDO 2)
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0xa4 /* SELECT */ => if buf[3] == 0x04 && buf[5] == 0x08 && buf[6] == 0xa0 {
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// Vesion: "FIDO_2_0"
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let mut reply = [buf[0], 0x46, 0x49, 0x44, 0x4f, 0x5f, 0x32, 0x5f, 0x30, 0x90, 0x00,];
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return_code = bench_transmit(&mut console, &timer, "TX: Version Str", &mut reply);
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} else if (buf[6] == 0xd2 && buf[7] == 0x76) || (buf[6] == 0xe1 && (buf[7] == 0x03 || buf[7] == 0x04)){
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let mut reply = [buf[0], 0x90, 0x00];
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return_code = bench_transmit(&mut console, &timer, "TX: 0x9000", &mut reply);
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} else /* Unknown file */ {
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let mut reply = [buf[0], 0x6a, 0x82];
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return_code = bench_transmit(&mut console, &timer, "TX: 0x6A82", &mut reply);
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}
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0xb0 /* READ */ => match buf[5] {
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0x02 => {
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let mut reply = [buf[0], 0x12, 0x90, 0x00,];
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return_code = bench_transmit(&mut console, &timer, "TX: File Size", &mut reply);
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}
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0x12 => {
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let mut reply = [buf[0], 0xd1, 0x01, 0x0e, 0x55, 0x77, 0x77, 0x77, 0x2e, 0x6f, 0x70, 0x65,
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0x6e, 0x73, 0x6b, 0x2e, 0x64, 0x65, 0x76, 0x90, 0x00,];
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return_code = bench_transmit(&mut console, &timer, "TX: NDEF", &mut reply);
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}
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0x0f => {
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let mut reply = [buf[0], 0x00, 0x0f, 0x20, 0x00, 0x7f, 0x00, 0x7f, 0x04, 0x06, 0xe1, 0x04,
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0x00, 0x7f, 0x00, 0x00, 0x90, 0x00,];
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return_code = bench_transmit(&mut console, &timer, "TX: CC", &mut reply);
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}
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_ => {
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let mut reply = [buf[0], 0x90, 0x00];
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return_code = bench_transmit(&mut console, &timer, "TX: 0x9000", &mut reply);
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}
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}
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_ => {
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let mut reply = [buf[0], 0x90, 0x00];
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return_code = bench_transmit(&mut console, &timer, "TX: 0x9000", &mut reply);
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}
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}
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0x26 | 0x52 | 0x50 /* REQA | WUPA | Halt */ => {
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return ReturnCode::EOFF;
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}
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_ => (),
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}
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return_code
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}
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pub fn nfc(mut console: &mut Console) {
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// Setup the timer with a dummy callback (we only care about reading the current time, but the
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// API forces us to set an alarm callback too).
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let mut with_callback = timer::with_callback(|_, _| {});
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let timer = with_callback.init().flex_unwrap();
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writeln!(
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console,
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"Clock frequency: {} Hz",
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timer.clock_frequency().hz()
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)
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.unwrap();
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let mut state_change_counter = 0;
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loop {
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let mut rx_buf = [0; 256];
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match receive_packet(&mut console, &mut rx_buf) {
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ReturnCode::EOFF => {
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// Not configured
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while !NfcTag::enable_emulation() {}
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// Configure Type 4 tag
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while !NfcTag::configure(4) {}
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}
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ReturnCode::ECANCEL /* field lost */ => {
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NfcTag::disable_emulation();
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}
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ReturnCode::EBUSY /* awaiting select*/ => (),
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ReturnCode::ENOMEM => {
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writeln!(console, " -- Amount more than buffer limit").unwrap()
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}
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ReturnCode::FAIL => writeln!(console, " -- Invalid CRC").unwrap(),
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ReturnCode::EINVAL /* covered in driver interface */ => (),
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ReturnCode::ENOSUPPORT => (),
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ReturnCode::SUCCESS => {
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// If the reader restarts the communication then disable the tag.
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match transmit_reply(&mut console, &timer, &rx_buf) {
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ReturnCode::ECANCEL | ReturnCode::EOFF => {
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if NfcTag::disable_emulation() {
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writeln!(console, " -- TAG DISABLED").unwrap();
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}
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state_change_counter += 1;
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}
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_ => (),
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}
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}
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}
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if state_change_counter > 100 {
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break;
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}
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}
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}
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}
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fn main() {
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let mut console = Console::new();
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writeln!(console, "****************************************").unwrap();
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writeln!(console, "nfct_test application is installed").unwrap();
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example::nfc(&mut console);
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writeln!(console, "****************************************").unwrap();
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}
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