Joseph Doherty
8a0f92b6bc
First slice of F26. Bridges F25's working AsbClient into the M0
`mxaccess::Transport` trait that Session uses to discriminate
operations across NMX and ASB transports.
API additions:
* `mxaccess::AsbTransport<T>` — generic over the same
AsyncRead+AsyncWrite+Unpin+Send+Sync+'static bound that AsbClient
takes. Owns an AsbClient and exposes it via `client_mut()` /
`into_client()`.
* `impl Transport for AsbTransport<T>`:
- `capabilities()` — `buffered_subscribe = false`,
`activate_suspend = false`, `operation_complete_frame = false`
per `design/60-roadmap.md` M5 (no NMX-specific extensions on
ASB).
- `kind()` — `TransportKind::Asb`.
Path-dep wiring: `mxaccess` now imports `mxaccess-asb` +
`mxaccess-asb-nettcp` directly.
Compile-time `Send + Sync + 'static` assertion guards the
trait-bound contract.
2 new tests:
* `asb_transport_kind_is_asb`.
* `asb_transport_capabilities_disable_buffered_and_activate_suspend`.
Stubbed for F26 step 2:
* `Session::connect_asb` constructor that owns TCP open +
preamble + DH handshake orchestration.
* Operation routing that maps ASB types (ItemStatus, RuntimeValue)
back to mxaccess types (MxStatus, DataChange, MxValue).
Stubbed for F26 step 3:
* Subscription routing — Session::subscribe on ASB needs F25
subscription operations (CreateSubscription / AddMonitoredItems
/ Publish), which are not yet implemented.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
design/ — Rust port architectural plan
This folder is the design contract for the Rust replacement of AVEVA/Wonderware MXAccess. It is the gap between the .NET reference in src/ and the Rust crates that will be written under a sibling rust/ workspace (per CLAUDE.md).
The folder is structured as a small set of focused documents. Read in order; each builds on the previous.
| File | Purpose |
|---|---|
00-overview.md |
Mission, two-layer goal, architectural principles, non-goals |
10-raw-layer.md |
Byte-accurate raw MXAccess layer (codec + transport + session) |
20-async-layer.md |
Idiomatic Tokio async layer on top of the raw layer |
30-crate-topology.md |
Cargo workspace, crates, dependencies, build/test commands |
40-protocol-invariants.md |
Bill of materials: IIDs, opnums, envelope/handle bytes |
50-error-model.md |
MxStatus, error types, panic/cancellation policy |
60-roadmap.md |
Milestones M0..M6, validation strategy |
70-risks-and-open-questions.md |
Parity gaps, unproven flows, cross-platform constraints |
dependencies.md |
Cross- and within-milestone parallelism map; agent budget per phase |
review.md |
Adversarial review log (BLOCKER/MAJOR/MINOR/NIT findings, all resolved) |
prompt.md |
/loop driver prompt for autonomous M2–M6 execution |
followups.md |
Open / resolved deferred work items; auto-triaged by prompt.md Step 0 (created on first /loop run if missing) |
The design is grounded in the .NET reference at src/ and the protocol artifacts in docs/, analysis/, and captures/. Do not introduce protocol behavior in these documents that is not already proven in the reference. When adding a new claim about wire format, cite either:
- a
.csfile path insrc/MxNativeCodec/,src/MxNativeClient/, orsrc/MxAsbClient/, or - a
docs/*.mdspec file, or - a
captures/0NN-frida-*directory oranalysis/frida/*.tsvrow.
This folder is documentation, not code. When the Rust workspace is created, the design here is the contract it must satisfy. When evidence in captures/ invalidates a design decision here, update the design first, then the code.
Reading order
- New contributor: 00 → 30 → 10 → 40 → 20 → 50 → 60 → 70.
- Protocol question: 40 first, then the relevant section of 10.
- API question: 20 first, then 50.
- Planning a milestone: 60 first, cross-reference 70 for blockers.
- Scheduling concurrent work:
dependencies.mdfor the per-phase parallelism map. - Driving M2–M6 autonomously via
/loop:prompt.md(and thefollowups.mdtriage log it maintains).