}
/// Process an individual `Frame` that has been decoded by the modem.
- pub fn handle_frame(&mut self, frame: Frame) -> Result<(), SoftTncError> {
+ pub fn handle_frame(&mut self, frame: Frame) {
match frame {
Frame::Lsf(lsf) => {
// A new LSF implies a clean slate.
})
}
Mode::Stream => {
+ let kiss = KissFrame::new_stream_setup(&lsf.0).unwrap();
+ self.kiss_to_host(kiss);
self.state = State::RxStream(RxStreamState { lsf, index: 0 });
}
}
let end = start + payload_len;
rx.packet[start..(start + payload_len)]
.copy_from_slice(&packet.payload);
+ // TODO: compatible packets should be sent on port 0 too
let kiss =
KissFrame::new_full_packet(&rx.lsf.0, &rx.packet[0..end])
.unwrap();
self.state = State::RxAcquiringStream(RxAcquiringStreamState { lich });
} else {
rx.index = stream.frame_number + 1;
- let kiss = KissFrame::new_stream_data(&stream.stream_data).unwrap();
+ let kiss = KissFrame::new_stream_data(&stream).unwrap();
self.kiss_to_host(kiss);
- // TODO: handle LICH contents to track META content
// TODO: end stream if LICH updates indicate non-META part has changed
// (this implies a new station)
if stream.end_of_stream {
}
}
}
- Ok(())
}
/// Update the number of samples that have been received by the incoming stream, as a form of timekeeping
///
/// After each frame input, this should be consumed in a loop until length 0 is returned.
/// This component will never block. Upstream interface can provide blocking `read()` if desired.
- pub fn read_kiss(&mut self, target_buf: &mut [u8]) -> Result<usize, SoftTncError> {
+ pub fn read_kiss(&mut self, target_buf: &mut [u8]) -> usize {
match self.outgoing_kiss.as_mut() {
Some(outgoing) => {
let n = (outgoing.kiss_frame.len - outgoing.sent).min(target_buf.len());
if outgoing.sent == outgoing.kiss_frame.len {
self.outgoing_kiss = None;
}
- Ok(n)
+ n
}
- None => Ok(0),
+ None => 0,
}
}
- pub fn write_kiss(&mut self, buf: &[u8]) -> Result<usize, SoftTncError> {
+ pub fn write_kiss(&mut self, buf: &[u8]) -> usize {
let target_buf = self.kiss_buffer.buf_remaining();
let n = buf.len().min(target_buf.len());
target_buf[0..n].copy_from_slice(&buf[0..n]);
while let Some(_kiss_frame) = self.kiss_buffer.next_frame() {
// TODO: handle host-to-TNC message
}
- Ok(n)
+ n
}
fn kiss_to_host(&mut self, kiss_frame: KissFrame) {
}
}
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Clone)]
pub enum SoftTncError {
General(&'static str),
InvalidState,
/// this will be between 0 and 32 inclusive.
count: usize,
}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+ use crate::kiss::{KissCommand, PORT_STREAM};
+ use crate::protocol::StreamFrame;
+
+ // TODO: finish all handle_frame tests as below
+ // this will be much more straightforward when we have a way to create LSFs programatically
+
+ // receiving a single-frame packet
+
+ // receiving a multi-frame packet
+
+ // part of one packet and then another
+
+ #[test]
+ fn tnc_receive_stream() {
+ let lsf = LsfFrame([
+ 255, 255, 255, 255, 255, 255, 0, 0, 0, 159, 221, 81, 5, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 131, 53,
+ ]);
+ let stream1 = StreamFrame {
+ lich_idx: 0,
+ lich_part: [255, 255, 255, 255, 255],
+ frame_number: 0,
+ end_of_stream: false,
+ stream_data: [
+ 128, 0, 119, 115, 220, 252, 41, 235, 8, 0, 116, 195, 94, 244, 45, 75,
+ ],
+ };
+ let stream2 = StreamFrame {
+ lich_idx: 1,
+ lich_part: [255, 0, 0, 0, 159],
+ frame_number: 1,
+ end_of_stream: true,
+ stream_data: [
+ 17, 0, 94, 82, 216, 135, 181, 15, 30, 0, 125, 195, 152, 183, 41, 57,
+ ],
+ };
+ let mut tnc = SoftTnc::new();
+ let mut kiss = KissFrame::new_empty();
+ assert_eq!(tnc.read_kiss(&mut kiss.data), 0);
+
+ tnc.handle_frame(Frame::Lsf(lsf));
+ kiss.len = tnc.read_kiss(&mut kiss.data);
+ assert_eq!(kiss.command().unwrap(), KissCommand::DataFrame);
+ assert_eq!(kiss.port().unwrap(), PORT_STREAM);
+
+ let mut payload_buf = [0u8; 2048];
+ let n = kiss.decode_payload(&mut payload_buf).unwrap();
+ assert_eq!(n, 30);
+
+ tnc.handle_frame(Frame::Stream(stream1));
+ kiss.len = tnc.read_kiss(&mut kiss.data);
+ assert_eq!(kiss.command().unwrap(), KissCommand::DataFrame);
+ assert_eq!(kiss.port().unwrap(), PORT_STREAM);
+
+ let n = kiss.decode_payload(&mut payload_buf).unwrap();
+ assert_eq!(n, 26);
+
+ tnc.handle_frame(Frame::Stream(stream2));
+ kiss.len = tnc.read_kiss(&mut kiss.data);
+ assert_eq!(kiss.command().unwrap(), KissCommand::DataFrame);
+ assert_eq!(kiss.port().unwrap(), PORT_STREAM);
+
+ let n = kiss.decode_payload(&mut payload_buf).unwrap();
+ assert_eq!(n, 26);
+ }
+
+ #[test]
+ fn tnc_acquire_stream() {
+ let frames = [
+ StreamFrame {
+ lich_idx: 0,
+ lich_part: [255, 255, 255, 255, 255],
+ frame_number: 0,
+ end_of_stream: false,
+ stream_data: [
+ 128, 0, 119, 115, 220, 252, 41, 235, 8, 0, 116, 195, 94, 244, 45, 75,
+ ],
+ },
+ StreamFrame {
+ lich_idx: 1,
+ lich_part: [255, 0, 0, 0, 159],
+ frame_number: 1,
+ end_of_stream: false,
+ stream_data: [
+ 17, 0, 94, 82, 216, 135, 181, 15, 30, 0, 125, 195, 152, 183, 41, 57,
+ ],
+ },
+ StreamFrame {
+ lich_idx: 2,
+ lich_part: [221, 81, 5, 5, 0],
+ frame_number: 2,
+ end_of_stream: false,
+ stream_data: [
+ 17, 128, 93, 74, 154, 167, 169, 11, 20, 0, 116, 91, 158, 220, 45, 111,
+ ],
+ },
+ StreamFrame {
+ lich_idx: 3,
+ lich_part: [0, 0, 0, 0, 0],
+ frame_number: 3,
+ end_of_stream: false,
+ stream_data: [
+ 15, 128, 114, 83, 218, 252, 59, 111, 31, 128, 116, 91, 84, 231, 45, 105,
+ ],
+ },
+ StreamFrame {
+ lich_idx: 4,
+ lich_part: [0, 0, 0, 0, 0],
+ frame_number: 4,
+ end_of_stream: false,
+ stream_data: [
+ 9, 128, 119, 115, 220, 220, 57, 15, 48, 128, 124, 83, 158, 236, 181, 91,
+ ],
+ },
+ StreamFrame {
+ lich_idx: 5,
+ lich_part: [0, 0, 0, 131, 53],
+ frame_number: 5,
+ end_of_stream: false,
+ stream_data: [
+ 52, 0, 116, 90, 152, 167, 225, 216, 32, 0, 116, 83, 156, 212, 33, 216,
+ ],
+ },
+ ];
+
+ let mut tnc = SoftTnc::new();
+ let mut kiss = KissFrame::new_empty();
+ for f in frames {
+ tnc.handle_frame(Frame::Stream(f));
+ }
+ kiss.len = tnc.read_kiss(&mut kiss.data);
+ let mut payload_buf = [0u8; 2048];
+ let n = kiss.decode_payload(&mut payload_buf).unwrap();
+ assert_eq!(n, 30);
+ assert_eq!(
+ &payload_buf[0..30],
+ [
+ 255, 255, 255, 255, 255, 255, 0, 0, 0, 159, 221, 81, 5, 5, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 131, 53,
+ ]
+ );
+ }
+
+ #[test]
+ fn tnc_handle_skipped_stream_frame() {
+ let lsf = LsfFrame([
+ 255, 255, 255, 255, 255, 255, 0, 0, 0, 159, 221, 81, 5, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 131, 53,
+ ]);
+ let stream1 = StreamFrame {
+ lich_idx: 0,
+ lich_part: [255, 255, 255, 255, 255],
+ frame_number: 0,
+ end_of_stream: false,
+ stream_data: [
+ 128, 0, 119, 115, 220, 252, 41, 235, 8, 0, 116, 195, 94, 244, 45, 75,
+ ],
+ };
+ let stream3 = StreamFrame {
+ lich_idx: 2,
+ lich_part: [221, 81, 5, 5, 0],
+ frame_number: 2,
+ end_of_stream: false,
+ stream_data: [
+ 17, 128, 93, 74, 154, 167, 169, 11, 20, 0, 116, 91, 158, 220, 45, 111,
+ ],
+ };
+ let mut tnc = SoftTnc::new();
+ let mut kiss = KissFrame::new_empty();
+ assert_eq!(tnc.read_kiss(&mut kiss.data), 0);
+
+ tnc.handle_frame(Frame::Lsf(lsf));
+ kiss.len = tnc.read_kiss(&mut kiss.data);
+ assert_eq!(kiss.command().unwrap(), KissCommand::DataFrame);
+ assert_eq!(kiss.port().unwrap(), PORT_STREAM);
+
+ let mut payload_buf = [0u8; 2048];
+ let n = kiss.decode_payload(&mut payload_buf).unwrap();
+ assert_eq!(n, 30);
+
+ tnc.handle_frame(Frame::Stream(stream1));
+ kiss.len = tnc.read_kiss(&mut kiss.data);
+ assert_eq!(kiss.command().unwrap(), KissCommand::DataFrame);
+ assert_eq!(kiss.port().unwrap(), PORT_STREAM);
+
+ let n = kiss.decode_payload(&mut payload_buf).unwrap();
+ assert_eq!(n, 26);
+
+ tnc.handle_frame(Frame::Stream(stream3));
+ kiss.len = tnc.read_kiss(&mut kiss.data);
+ assert_eq!(kiss.command().unwrap(), KissCommand::DataFrame);
+ assert_eq!(kiss.port().unwrap(), PORT_STREAM);
+
+ let n = kiss.decode_payload(&mut payload_buf).unwrap();
+ assert_eq!(n, 26);
+ }
+}
projects / m17rt / blobdiff