mux-rs/CHANGELOG.md

Changelog

1.0.2 — 2026-05-11

Changed

• Refreshed Cargo.lock to pull in the latest compatible patch/minor releases of dependencies:
  • donglora-client 1.0.2 → 1.1.1
  • donglora-protocol 1.0.0 → 1.2.0
  • tokio 1.51.0 → 1.52.3
  • clap 4.6.0 → 4.6.1
  • heapless 0.9.2 → 0.9.3
  • libc 0.2.184 → 0.2.186
  • bitflags 2.11.0 → 2.11.1 No source changes; CLI and behavior are unchanged.

1.0.1 — 2026-04-22

Dependencies

• Bumped donglora-client to 1.0.1 — adds the WCH CH340K USB-UART bridge (1a86:7522) to the port-discovery list. The Elecrow ThinkNode-M2 board is now detected automatically; previously mux refused to attach to it because the bridge VID:PID wasn't recognized.

1.0.0 — 2026-04-22

Breaking

• Upgraded to DongLoRa Protocol v2 wire format. Wire-incompatible with 0.x clients and firmware. Now depends directly on donglora-protocol for frame encode/decode.
• Tag-aware dispatch. Each inbound client frame is re-tagged with a mux-allocated device tag; responses are routed back to the original client using the tag mapping. No more single-oneshot response slot — multiple clients can have commands in flight concurrently.

Added

• Full §13.2 multi-client SET_CONFIG semantics. Tracks the (client, modulation) lock owner. Cross-client calls synthesize:
  • OK(APPLIED / MINE, params) when the calling client owns the lock (forwarded to dongle).
  • OK(ALREADY_MATCHED / OTHER, current) when another client holds the lock and the requested params byte-match.
  • OK(LOCKED_MISMATCH / OTHER, current) when another client holds the lock and the requested params differ.
  • Lock is released automatically when the owning client disconnects.
• TX loopback fan-out (spec §13.4). On TX_DONE(TRANSMITTED), the mux synthesizes an RX frame with origin = LocalLoopback and sends it to every connected client except the transmitter.
• Async ERR(EFRAME) fan-out. If the dongle emits async framing errors (tag = 0), they're broadcast to all clients rather than swallowed.
• Per-client TX cache on ClientSession so the loopback fan-out doesn't need the sender to re-buffer.
• TagMapper with skip-zero allocation and per-client bulk drop on disconnect.

Removed

• The single pending_response: oneshot::Sender slot in the daemon (fundamentally incompatible with v1.0's per-tag concurrency).
• The separate 5-second keepalive timer — replaced with a 500 ms internal cadence matching the spec §3.4 inactivity window.

0.2.2 — 2026-04-08

Fixed

• Bumped MSRV from 1.85 to 1.93 to satisfy ucobs dependency requirement. cargo install donglora-mux now works on toolchains >= 1.93.

0.2.1 — 2026-04-07

Fixed

• Exclusive serial port lock. The mux now acquires an flock-based exclusive lock on the serial port before opening it. This prevents other processes (bridges, other mux instances) from directly opening the same device while the mux owns it. The lock is held for the duration of the dongle session and auto-released on disconnect or crash.

0.2.0 — 2026-04-07

Changed

• Upgraded to donglora-client 0.2 (published crate, no more monorepo path dep).
• Wire-level protocol constants now imported from donglora_client::protocol::*.

Fixed

• Repository URL now points to github.com/donglora/mux-rs.
• README links updated (removed stale monorepo paths).
• Added rust-version, homepage, and exclude to Cargo.toml.

0.1.1 — 2026-04-06

Fixed

• Prevent multiple mux instances from running simultaneously via file-based exclusive lock (fd-lock); stale sockets from crashed instances are cleaned up automatically
• Clearer error message when TCP port is already in use

0.1.0 — 2026-04-06

Initial release.

Features

• USB multiplexer daemon: share one DongLoRa dongle with multiple applications
• Unix domain socket and optional TCP listeners (same COBS-framed protocol)
• RxPacket broadcast to all connected clients
• Reference-counted StartRx/StopRx across clients
• Config locking: first client sets radio config, others must match or fail
• Auto-reconnect on USB hot-plug with ping verification
• Bounded per-client send queues (256 frames) with backpressure isolation
• Smart interception: redundant commands get synthetic responses without hitting the dongle
• Graceful shutdown on SIGINT/SIGTERM with socket cleanup
• TCP_NODELAY on accepted connections for low-latency frame delivery
• CLI: --port, --socket, --tcp, --verbose options