refactor(quic)!: send options for streams and datagrams, private send domains by kixelated · Pull Request #5872 · moq-dev/moq

kixelated · 2026-10-17T16:13:04Z

Problem

The m1/quic work left moq-quic's public surface rough, per an API audit:

Datagrams took (data, group, order) while streams joined a group through setters after opening, so the same scheduling shape was spelled two ways, and order meant what priority means everywhere else.
SendDomain, SendGroups::open_domain/close_domain, and the domain argument of SendGroups::open were public with no consumer outside moq-quic's own tests.
SendDatagramError was not #[non_exhaustive].
Stale docs, and changelogs missing several unreleased breaks.

Approach

Send options, modeled on W3C WebTransport's WebTransportSendOptions { sendGroup, sendOrder }. A small SendOptions { group: Option<&Group>, priority: i64 } (default: ungrouped, priority 0) in moq-quic and moq-net's transport::poll. Stream creation and datagram send take it at every layer. The setters stay, since a peer-opened bidi stream joins a group through them.
moq-net's publishers build the options from their rank and pass them to the open, which deletes the open-then-set_group/set_priority code (Rank::place, Writer::set_group).
The runtime adapters (moq-tokio, moq-uring, moq-ffi, moq-wasm) apply a new stream's options through the existing setters, since their backends open through web_transport_trait.
Send domains are #[cfg(test)] in moq-quic; the DRR machinery and its tests stay for the track-priority-scope quest.
SendDatagramError is #[non_exhaustive].
Docs and the moq-quic README updated. The per-package MIGRATE.md guides (moq-quic, moq-net, moq-tokio, moq-uring) show the final SendOptions signatures, and moq-relay and moq-cli gain the feat(relay): widen QUIC limits for cluster peers #5674 entries they lacked; each was checked against origin/release.
Quest hand-off notes in drop-web-transport-trait and track-priority-scope.

Impact

No wire change. Public API (all unreleased on trunk except where noted):

moq-quic: new SendOptions<'a, G = SendGroup>. Streams::open(dir) is open(dir, SendOptions). Datagrams::send(data, group, order) is send(data, SendOptions). SendGroups::open(priority, domain) is open(priority). SendDomain, open_domain, close_domain are no longer public. SendDatagramError is #[non_exhaustive].
moq-net transport::poll (released traits change): new SendOptions<'a, G>. poll_open_uni(cx)/poll_open_bi(cx) take SendOptions, as do the open_uni/open_bi helpers. send_datagram(payload, group, order) is send_datagram(payload, SendOptions).
moq-tokio quic::driver (hidden): new SendOptions alias. Connection::open_uni/open_bi/send_datagram take it. quic::web::Session::open_uni/open_bi/send_datagram take it. SendDatagramError's UnsupportedByPeer/Disabled/TooLarge fold into one transparent Refused(moq_quic::SendDatagramError), so a new moq-quic variant needs no panic.
moq-uring quic: new SendOptions alias. Connection::send_datagram and web::Session::send_datagram take it.
moq-ffi, moq-wasm: internal adapters only; no binding changes.

Alternatives

Positional (data, priority, group), the first proposal. Superseded by the struct, which matches W3C.
send::Options, or a #[non_exhaustive] struct. Decided by the maintainer: keep SendOptions, exhaustive, so callers build it with a struct literal. A new field such as W3C's waitUntilAvailable would be a breaking change.
Erroring on a send group from another connection instead of panicking. Decided by the maintainer: keep the documented panic. It is a programmer bug (quinn-style contract, like a stream id from another connection) that moq-net never triggers, since each session opens its own groups, and it is checked before anything is allocated. An error would add variants to moq-quic's open (today an Option), set_group, both drivers' open/set_group/send_datagram, and make moq-net's infallible set_group fallible. The panic is documented at each layer.

Follow-ups

quest/m2/drop-web-transport-trait.md: driver drift (two send_datagrams through Deref, setter receivers, send_group receivers, Send + Sync, hidden modules), and native options on open once backends implement moq-net's traits.
quest/m1/track-priority-scope.md: expose domains and give send_group its domain in one trait break.

🤖 Generated with Claude Code

(Written by Claude Opus 5.5)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

moq-uring's Local wrapper and a few tests from main still used the positional open and datagram signatures. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

chatgpt-codex-connector · 2026-10-17T19:41:50Z

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-18T01:30:23.935473Z	`c44f3e9`	New commits

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# Conflicts: # doc/setup/upgrade.md

coderabbitai · 2026-10-17T19:51:04Z

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI
Review profile: CHILL
Plan: Advanced
Run ID: 8e9593ba-c11c-427f-b7bf-d4661e469f88

📥 Commits

Reviewing files that changed from the base of the PR and between f700ead and c44f3e9.

📒 Files selected for processing: 10

rs/moq-cli/MIGRATE.md
rs/moq-net/MIGRATE.md
rs/moq-net/src/ietf/publisher.rs
rs/moq-net/src/lite/subscriber.rs
rs/moq-quic/MIGRATE.md
rs/moq-relay/MIGRATE.md
rs/moq-tokio/MIGRATE.md
rs/moq-tokio/src/quic/driver/connection.rs
rs/moq-tokio/src/quic/web/error.rs
rs/moq-uring/MIGRATE.md

💤 Files with no reviewable changes: 1

rs/moq-tokio/src/quic/web/error.rs

🚧 Files skipped from review as they are similar to previous changes: 1

rs/moq-quic/MIGRATE.md

Included review availability: This review used your included allowance. Your plan provides up to 4 included reviews per hour; 1 remain after this review.

Walkthrough

The change adds SendOptions to stream-opening and datagram-sending APIs. The options carry an optional send group and an i64 priority. QUIC scheduling and transport adapters consume or forward these options, and publishers provide rank options when opening streams. Call sites, tests, benchmarks, fuzzing, and migration notes are updated for the revised APIs. Some backends ignore datagram options or drop datagrams when they lack capacity.

Priority: ➖ Normal

Merge Risk: ⚪ Minimal · up to c44f3

The reported panic and misleading upgrade guidance are not present at this head. No actionable merge-blocking risk remains after normal checks.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 72.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 322 functions across 50 files. (6 skipped…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description check		The description clearly explains the SendOptions API refactor, private send domains, adapter updates, migration notes, and compatibility impact.
Title check		The title clearly summarizes the primary changes: SendOptions for streams and datagrams and private send domains.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 72.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 322 functions across 50 files. (6 skipped: 6 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

Fix all pre-merge checks with AI

✨ Finishing Touches

✨ Simplify code

Commit to this branch
Create a new PR

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Actionable comments posted: 2

🪄 Fix comments: Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @doc/setup/upgrade.md:
- Line 477: Update the migration summary around poll_send_datagram to replace
the inline poll::Session and SendStream method list with a link to the
moq-net::transport::poll API documentation, and describe the current
send_datagram(payload, options) signature without assigning the no-options form
to poll::Session.

Review comments at @rs/moq-tokio/src/quic/driver/connection.rs:
- Line 560: Replace the `unreachable!` wildcard in the datagram error mapping
with a dedicated catch-all `SendDatagramError` variant, and map unmapped
`moq_quic::SendDatagramError` values to it rather than `Disabled`. Ensure this
path returns an error without panicking while the connection state lock is held.

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Configuration used: Organization UI
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Plan: Advanced
Run ID: ece23f66-9b5d-4ccc-9ff6-00a0b3ad53f9

📥 Commits

Reviewing files that changed from the base of the PR and between 0df49c1 and f700ead.

📒 Files selected for processing: 66

doc/setup/upgrade.md
quest/m1/track-priority-scope.md
quest/m2/drop-web-transport-trait.md
rs/moq-ffi/src/transport/adapter.rs
rs/moq-net/src/client.rs
rs/moq-net/src/coding/stream.rs
rs/moq-net/src/coding/writer.rs
rs/moq-net/src/ietf/adapter.rs
rs/moq-net/src/ietf/publisher.rs
rs/moq-net/src/ietf/session.rs
rs/moq-net/src/ietf/subscriber.rs
rs/moq-net/src/lite/publisher.rs
rs/moq-net/src/lite/session.rs
rs/moq-net/src/lite/subscriber.rs
rs/moq-net/src/lite/test_transport.rs
rs/moq-net/src/server.rs
rs/moq-net/src/transport.rs
rs/moq-net/src/transport/memory.rs
rs/moq-net/tests/integration/goaway.rs
rs/moq-net/tests/integration/subscribe_tracks.rs
rs/moq-net/tests/integration/support/mock.rs
rs/moq-quic/MIGRATE.md
rs/moq-quic/README.md
rs/moq-quic/benches/receive.rs
rs/moq-quic/benches/streams.rs
rs/moq-quic/benches/wire.rs
rs/moq-quic/src/connection/datagrams.rs
rs/moq-quic/src/connection/mod.rs
rs/moq-quic/src/connection/streams/mod.rs
rs/moq-quic/src/connection/streams/saturated.rs
rs/moq-quic/src/connection/streams/schedule.rs
rs/moq-quic/src/connection/streams/state.rs
rs/moq-quic/src/fuzz.rs
rs/moq-quic/src/fuzz/connection.rs
rs/moq-quic/src/lib.rs
rs/moq-quic/src/tests/characterize/limits.rs
rs/moq-quic/src/tests/characterize/paths.rs
rs/moq-quic/src/tests/characterize/reset.rs
rs/moq-quic/src/tests/characterize/schedule.rs
rs/moq-quic/src/tests/mod.rs
rs/moq-quic/src/tests/reset_stream_at.rs
rs/moq-quic/src/tests/sim.rs
rs/moq-relay/tests/integration/peer_limits.rs
rs/moq-tokio/src/quic/driver/connection.rs
rs/moq-tokio/src/quic/driver/mod.rs
rs/moq-tokio/src/quic/driver/send_group.rs
rs/moq-tokio/src/quic/driver/tests.rs
rs/moq-tokio/src/quic/web/connect.rs
rs/moq-tokio/src/quic/web/session.rs
rs/moq-tokio/src/quic/web/settings.rs
rs/moq-tokio/src/transport.rs
rs/moq-tokio/src/transport/grouped.rs
rs/moq-tokio/src/transport/owned.rs
rs/moq-tokio/tests/integration/stream_code.rs
rs/moq-uring/benches/echo_quic.rs
rs/moq-uring/src/quic/driver/connection.rs
rs/moq-uring/src/quic/driver/group.rs
rs/moq-uring/src/quic/driver/mod.rs
rs/moq-uring/src/quic/mod.rs
rs/moq-uring/src/quic/web.rs
rs/moq-uring/src/transport.rs
rs/moq-uring/src/transport/adapter.rs
rs/moq-uring/src/transport/local.rs
rs/moq-uring/tests/integration/echo.rs
rs/moq-uring/tests/integration/web.rs
rs/moq-wasm/src/transport/adapter.rs

💤 Files with no reviewable changes: 1

rs/moq-net/src/coding/writer.rs

Included review availability: This review used your included allowance. Your plan provides up to 4 included reviews per hour; 0 remain after this review.

moq-quic's SendDatagramError is non_exhaustive, so the tokio driver's wildcard would panic on a new variant. Carry it in one transparent Refused variant, and link the upgrade note to the poll trait docs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

# Conflicts: # doc/setup/upgrade.md # rs/moq-quic/MIGRATE.md

kixelated · 2026-10-18T03:42:49Z

Merging at c44f3e9: CI green, CodeRabbit findings fixed and acknowledged, Codex +1 after the head merge of main.

The maintainer considered a Group(u64) newtype and kept the Option<&Group> handle: group priority lives on the group across idle gaps, Drop releases it, ids can't collide, a group from another connection is refused, and None is the ungrouped tier like W3C's null sendGroup. The id shape may be revisited in the quest/m1/track-priority-scope.md trait break.

(Written by Claude Opus 5.5)

Implemented in #5770 and refined in #5872, with publisher integration, saturation and eviction regressions, fanout benchmarks, and draft coverage on main. Co-Authored-By: GPT-6.1-Sol <noreply@openai.com>

kixelated and others added 7 commits October 17, 2026 08:17

wip: send options for streams and datagrams, private send domains

202dc2c

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

style: fmt

a3acda9

wip: docs, changelogs, quest notes, mock priority

8a13d2b

fix(quic): refuse a foreign group before opening

20a7d0e

Merge origin/main

02153d3

Merge remote-tracking branch 'origin/main' into moq-quic-tidy-api

f6b2202

fix: port main's new transport callers to send options

f700ead

moq-uring's Local wrapper and a few tests from main still used the positional open and datagram signatures. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

kixelated marked this pull request as ready for review October 17, 2026 19:41

Merge remote-tracking branch 'origin/main' into moq-quic-tidy-api

a726f31

# Conflicts: # doc/setup/upgrade.md

coderabbitai Bot reviewed Oct 17, 2026

View reviewed changes

Comment thread doc/setup/upgrade.md Resolved

Comment thread rs/moq-tokio/src/quic/driver/connection.rs Resolved

kixelated and others added 2 commits October 17, 2026 13:01

Merge remote-tracking branch 'origin/main' into moq-quic-tidy-api

c44f3e9

# Conflicts: # doc/setup/upgrade.md # rs/moq-quic/MIGRATE.md

kixelated added this pull request to the merge queue Oct 18, 2026

Merged via the queue into main with commit 8e3966c Oct 18, 2026
12 checks passed

kixelated deleted the moq-quic-tidy-api branch October 18, 2026 04:14

kixelated mentioned this pull request Oct 18, 2026

fix(quic): send a client's queued Finished ahead of its close #5721

Merged

kixelated mentioned this pull request Oct 19, 2026

docs(quest): reconcile stale plans and checkpoint the tree audit #5980

Merged

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refactor(quic)!: send options for streams and datagrams, private send domains - #5872

refactor(quic)!: send options for streams and datagrams, private send domains#5872
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