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Changelog

All notable changes to cpp-LIN are documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

[0.4.2]

Fixed

  • virtual::Bus::publish() (and the default IBus::publish() entry point) now forces the classic checksum for diagnostic frame IDs 0x3C/0x3D regardless of the caller's requested checksum type, matching LIN 2.2A §2.3.1.5 and RELAY §15.3, and matching validate_frame()'s existing rejection of enhanced-checksum diagnostic frames.
  • RELAY adapter LinAdapter::send() now honours the bridged message's lin.checksum_type (and forces classic for 0x3C/0x3D), routing to publish_classic() instead of unconditionally upgrading every bridged frame to the enhanced checksum via publish().
  • master::Node::run() now returns success (a no-op) for an empty schedule table instead of lin::Errc::invalid_frame, matching RELAY §8.3 ("an empty table is valid and disables scheduled transmission").
  • LDF parser now clamps Signal::bit_width to [0, 64] at parse time, so DB::decode()'s bit-extraction loop can no longer be driven into a shift-by->=64 (undefined behaviour) by a malformed/adversarial LDF file combined with an oversized payload.

Changed

  • CI: ilammy/msvc-dev-cmd and softprops/action-gh-release pinned to commit SHA instead of a floating major-version tag.
  • CI: cpfusa init / cpfusa hara init steps no longer swallow failures with || true — a failed init step now hard-fails the job instead of letting every downstream FuSa/HARA step silently run against a missing/stale config.

[0.4.1]

Added

  • verify_checksum(): validates a received checksum byte against the locally-computed value (ISO 17987 frame reception).
  • lin::Errc::no_response, a distinct "no slave answered" sentinel that compares equivalent to a relay timeout, replacing the previous generic timeout return from send_header.
  • CHANGELOG.md (this file).

Changed

  • Declared RELAY spec version bumped 1.11 → 2.0 across headers, CLI JSON, README, HARA, and requirements.
  • master::Node::set_schedule now accepts an empty schedule (disables scheduled transmission), matching the virtual bus and the spec.
  • Chan::send_drop_oldest reports whether it evicted an item so DropOldest back-pressure now increments the drop counter instead of the delivery counter on eviction.
  • Frame::checksum_type now defaults to Classic (the enum's zero value), matching the canonical default used by the other language bindings.
  • capabilities no longer duplicates virtual between features and transports.
  • E2E Receiver::unwrap no longer advances its sequence counter on a rejected (out-of-order) frame, so a persistent shifted stream keeps being flagged instead of resyncing after a single error.

Fixed

  • from_message now rejects an unrecognized lin.checksum_type instead of silently coercing it to Classic.
  • testdata/relay-vectors/lin-frame.json now encodes lin.checksum_type as "enhanced" instead of the numeral "1".
  • HARA SG-03 status corrected from "Implemented" to "Partial" pending a verified-checksum code path in a real (non-virtual) bus backend.
  • Corrected the Safety Goal cross-references on three .fusa-reqs.json requirement rationales (SG-02/SG-01 instead of SG-05) and added the previously-undefined REQ-CLI-001..006 / REQ-SEC-013 requirement entries for existing fusa:req trace tags.
  • HARA citation for error handling corrected from spec §15 to §5.

[0.4.0]

Added

  • RELAY ecosystem audit fixes.

[0.3.0]

Added

  • RELAY spec v1.11 conformance (see ROADMAP.md for detail).

[0.2.0]

Added

  • Full safety and cyber pack: TARA, FMEA, SAS, boundary diagram, Safety Manual, IEC 62443 artifacts (see ROADMAP.md for detail).

[0.1.0]

Added

  • Initial C++ LIN bus port: core frame types, PID/checksum, virtual bus, master/slave nodes, E2E safety layer, LDF parser, and RELAY adapter/CLI.