can_iso_tp/
errors.rs

1//! Transport-layer error types.
2
3/// Timeout category identifiers (ISO-TP naming).
4///
5/// These names follow the ISO-TP timeout terminology:
6/// - `N_As` / `N_Ar` are sender/receiver timeouts for CAN frame transmission/reception.
7/// - `N_Bs` / `N_Br` relate to flow control and consecutive frame reception.
8/// - `N_Cs` relates to pacing between consecutive frames.
9#[derive(Debug, Clone, Copy, PartialEq, Eq)]
10pub enum TimeoutKind {
11    /// Timeout while sending a frame.
12    NAs,
13    /// Timeout while waiting for receive queue.
14    NAr,
15    /// Timeout waiting for flow control.
16    NBs,
17    /// Timeout waiting for consecutive frame.
18    NBr,
19    /// Timeout between consecutive frame sends.
20    NCs,
21}
22
23/// Transport-layer errors surfaced by the ISO-TP implementation.
24#[derive(Debug)]
25pub enum IsoTpError<E> {
26    /// Deadline exceeded for the indicated phase.
27    Timeout(TimeoutKind),
28    /// Frame received in an unexpected state.
29    UnexpectedPdu,
30    /// Sequence number mismatch.
31    BadSequence,
32    /// Remote side indicated overflow or length invalid.
33    Overflow,
34    /// Malformed CAN frame content.
35    InvalidFrame,
36    /// Configuration rejected at construction time.
37    InvalidConfig,
38    /// Backend would block in non-blocking mode.
39    WouldBlock,
40    /// Receive buffer could not fit data.
41    RxOverflow,
42    /// Operation attempted while a transfer is active.
43    NotIdle,
44    /// Wrapper around backend-specific errors.
45    LinkError(E),
46}
47
48impl<E> From<E> for IsoTpError<E> {
49    /// Convert a backend-specific error into [`IsoTpError::LinkError`].
50    fn from(err: E) -> Self {
51        IsoTpError::LinkError(err)
52    }
53}
can_iso_tp/errors.rs

can_iso_tp/
errors.rs
