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fix(net)!: bound timestamps to 2^61 - 1 so lite-05/06 can carry every one - #6168
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…racks lite-07 TRACK_INFO gains `Unverified (8)`. A timed track received over lite-05/06 or moq-transport is unverified, and relays preserve the mark, so the rewind check runs on received groups only where every hop could vouch for them. Replaces the session-level received mark in Rust and js/net, and completes quest/m1/lite-time-provenance. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A receiver drops every timestamp it gets over moq-lite-05/06, whose send times look like media time, so those tracks arrive and are forwarded untimed. The lite-07 TRACK_INFO Unverified byte is gone. Timed tracks received over moq-transport stay unchecked and are served to moq-lite untimed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…ovenance # Conflicts: # doc/concept/moq-lite.md # rs/moq-net/src/lite/publisher.rs # rs/moq-net/src/lite/subscriber.rs # rs/moq-net/src/lite/track.rs
… one lite-05/06 zigzag a group's first timestamp from zero into a QUIC varint, which holds at most 2^61 - 1. A larger timestamp was accepted by the model, then the lite-06 encoder failed the group stream before its header was visible, leaving the subscriber waiting forever. Bounding Timestamp itself refuses it at the write, and a received timestamp past the bound is a malformed track on every version, so a relay never holds one it cannot forward. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Tests that read timestamps back over lite-05/06 now expect them dropped, or move to lite-07 where the timestamps are the point. The test relay also accepts lite-07 for a client that opts in. TrackInfo::serve replaces the From conversion now that compression depends on the version. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Outcome: the lite-06 hang was the fixture's timestamp, not its sequence. lite-05/06 cannot zigzag a first-frame timestamp of 2^61 or more, so this PR bounds (Written by Claude Opus 5.5) |
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
# Conflicts: # quest/m1/README.md
The C++ probe's default lite-06 session and the wasm baseline and UniFFI cases on the lite-06 relay now expect untimed frames, as lite-02 already did. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
#6183 completed and deleted quest/m1/resume-outage.md while two Related lists still linked it, which fails quest check on main. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
# Conflicts: # rs/moq-net/src/model/track.rs
An unchecked track is served untimed to moq-lite, which on lite-05/06 means each frame and datagram carries its send time. The publisher still wrote the frame's own timestamp, a possible moq-transport arrival time. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
# Conflicts: # quest/m1/README.md # rs/moq-net/MIGRATE.md # rs/moq-net/src/ietf/object.rs
WalkthroughThe maximum timestamp is now 2^61 - 1. Timestamp operations reject values above that limit, and received timestamps above it fail the group as a malformed track. Tests and timestamp clamping use the new bound while preserving sequence values beyond it. Migration guides and protocol documentation describe the limit and its handling. Priority: ➖ Normal Severity of issue fixed: Medium Merge Risk: 🔵 Low · up to
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| Check name | Status | Explanation |
|---|---|---|
| Description check |  |
The description directly explains the timestamp-bound change, its root cause, implementation, wire impact, tests, and migration effects. |
| Title check | |
The title clearly and concisely identifies the main change: bounding timestamps at 2^61 - 1 so lite-05/06 can carry them. |
| Docstring Coverage | |
Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 24 functions across 10 files. (12 skipped:… |
| 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
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Explanation
Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 24 functions across 10 files. (12 skipped: 12 unsupported.)
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# Conflicts: # quest/m1/ietf-extension/serve-timed.md # rs/moq-net/src/ietf/subscriber.rs # rs/moq-net/src/lite/publisher.rs # rs/moq-net/src/lite/subscriber.rs # rs/moq-net/src/model/group.rs # rs/moq-net/src/model/track.rs
Resolves the overlap in the lite subscriber tests, the moq-lite draft, and the uniffi ladder case: lite-05/06 drop received timestamps but still refuse one past 2^61 - 1. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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@codex review This head merges main and moq-dev/moq#6150 (queued ahead of this PR), resolving the overlap in the lite subscriber tests, the moq-lite draft, and the uniffi ladder case. lite-05/06 drop received timestamps but still refuse one past 2^61 - 1. (Written by Claude Opus 5.5) |
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| .with_refresh(info.refresh) | ||
| .with_compress(info.compress); | ||
| source.lister.add(name.clone(), info)?; | ||
| source.lister.add(name.clone(), info.into())?; |
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When receiving a TRACKS stream on Lite05/06, TrackInfo::into preserves the wire timescale even though this change intentionally treats every track received on those versions as untimed. The subscription path later clears info.timescale, so listing consumers observe a timed track while subscribing to that same track yields untimed frames; relays can also advertise this inconsistent metadata downstream. Apply the version-aware has_media_time conversion here as the subscribe path does.
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Declined: TRACKS is lite-07 only. Version::has_tracks() is false for lite-01 through lite-06, so poll_listing aborts a lite-05/06 listing with Unsupported before opening a Tracks Stream, and TracksEvent refuses to encode on lite-06. A lite-05/06 session never reaches TrackInfo::into here, so no timed listing can disagree with an untimed subscription.
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…ovenance Keeps main's optional startTrack start and its lite-06+ startTrack call, and drops hooks.receiveTrack, which this PR deletes. Both conflicting quest/m1 README lines go: their quests are deleted (js-start-parity on main, lite-time-provenance here). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
# Conflicts: # js/net/src/internal.ts # js/net/src/lite/subscriber.ts # quest/m1/README.md
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Re-queueing after the merge queue dropped this PR for a conflict with
(Written by Claude Opus 5.5) |
The bound reaches every binding through Timestamp::from_micros, so each wrapper's guide names its TimeOverflow error and the clamp. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…9649f9506b7 # Conflicts: # cpp/moq/MIGRATE.md # dart/moq/MIGRATE.md # drafts/draft-lcurley-moq-lite.md # go/wrapper/MIGRATE.md # js/net/src/ietf/subscriber.ts # js/net/src/lite/group.ts # js/net/src/lite/publisher.ts # js/net/src/lite/subscriber.ts # js/net/src/track.ts # kt/moq/MIGRATE.md # py/moq-rs/MIGRATE.md # quest/m1/README.md # quest/m1/public-model/ingest.md # quest/m1/ts-reliability/arrival-stamps.md # rs/moq-c/MIGRATE.md # rs/moq-ffi/MIGRATE.md # rs/moq-net/MIGRATE.md # rs/moq-net/src/ietf/subscriber.rs # rs/moq-net/src/lite/subscriber.rs # rs/moq-net/src/model/track.rs # swift/MIGRATE.md # test/wasm/uniffi/cases.ts
This PR settles the lite-06 max sequence quest, so lite-07 no longer waits on it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Re-queueing after the merge queue dropped this PR for a conflict with moq-dev/moq#6150 landed as a squash, so every file this branch had merged from its head conflicted wherever
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# Conflicts: # quest/m1/lite07-finalize.md
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Review comments at @go/wrapper/MIGRATE.md:
- Line 41: Update the timestamp-clamping guidance in the migration instructions
to give Go callers a microsecond limit that converts safely to time.Duration,
and distinguish that limit from the Rust timestamp bound of 2^61 - 1
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📒 Files selected for processing: 24
cpp/moq/MIGRATE.mddart/moq/MIGRATE.mddrafts/draft-lcurley-moq-lite.mdgo/wrapper/MIGRATE.mdkt/moq/MIGRATE.mdpy/moq-rs/MIGRATE.mdquest/m1/README.mdquest/m1/lite06-max-sequence.mdquest/m1/lite07-finalize.mdrs/moq-c/MIGRATE.mdrs/moq-cli/src/play/timeline.rsrs/moq-e2ee/src/tests.rsrs/moq-ffi/MIGRATE.mdrs/moq-mux/src/clock.rsrs/moq-net/MIGRATE.mdrs/moq-net/src/ietf/object.rsrs/moq-net/src/lite/subscriber.rsrs/moq-net/src/model/time.rsrs/moq-net/tests/integration/wide_sequence.rsrs/moq-relay/tests/integration/connection.rsrs/moq-video/src/capture/channel.rsswift/MIGRATE.mdtest/wasm/generator.mdtest/wasm/uniffi/cases.ts
💤 Files with no reviewable changes: 2
- quest/m1/README.md
- quest/m1/lite06-max-sequence.md
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| Writing a frame, or any other call that takes a timestamp, fails with `ErrTimeOverflow` past `2^61 - 1` microseconds instead of `2^62 - 1`, the most moq-lite-05/06 can carry. | ||
| A received timestamp past it fails the group as a malformed track. | ||
| Clamp timestamps you build from unbounded input to `2^61 - 1`. |
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🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win
Give Go callers a representable clamp.
A frame timestamp is a *time.Duration (Lines 198-201). 2^61 - 1 microseconds exceeds the range of that nanosecond-based type. If a caller follows this instruction when converting unbounded microseconds to time.Duration, the conversion overflows before the write. Specify a clamp that also respects the time.Duration range, and distinguish it from the Rust timestamp bound.
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Review comment at @go/wrapper/MIGRATE.md at line 41:
Update the timestamp-clamping guidance in the migration instructions to give Go
callers a microsecond limit that converts safely to time.Duration, and
distinguish that limit from the Rust timestamp bound of 2^61 - 1 microseconds.
After applying the fix, consider running `coderabbit review --agent` for local
review. Visit https://docs.coderabbit.ai/cli?utm_source=ghpr
Completes lite-06 max sequence.
Root cause
The browser fixture's lite-06 hang was never about the group sequence. It also wrote
timestampUs = sequence, and lite-05/06 zigzag a group's first timestamp from zero into a QUIC varint, which holds at most 2^61 - 1.Timestampaccepted up to 2^62 - 1, so the model took 2^62 - 1, the lite-06 encoder failed the group stream before its header was visible, and the subscriber waited forever. Reproduced natively over the moq-net memory transport, no relay needed:wide_sequence::largest_quic_sequence_reaches_the_subscriberwith the timestamp uncapped fails withmoq-lite-06 relayed=false sequence=4611686018427387903 hung.Fix
Timestampnow stops at 2^61 - 1, so every timestamp is encodable on every version and the refusal happens at the write (writeFramethrowsTimeOverflow) instead of silently on one session's egress. A received timestamp past the bound (lite-05/06 via a later delta, lite-07 via its 64-bit varint, moq-transport via its property) fails as a malformed track, so a relay never holds one it cannot forward to a lite-05/06 peer. This follows the draft's precedent of saturating route cost at 2^62 - 1 so it stays forwardable to lite-06.Considered and rejected: keeping the 2^62 - 1 range and refusing per session on lite-05/06 egress. The publisher's API cannot know which versions will carry the track (a relay fans it out to many), so the refusal would land on a subscriber as a group or subscription error far from the write, and needs a recovery contract (reset after the header, or SUBSCRIBE_DROP, which moq-dev/moq#6143 owns). Bounding the type makes the unencodable value unrepresentable.
rs/moq-net/src/model/time.rs: privateMAX_TIMESTAMP = 2^61 - 1boundsnew,from_*,convert,checked_add, andTryFrom<Duration>.Timescalekeeps the QUIC varint range.drafts/draft-lcurley-moq-lite.md: timestamps MUST be below 2^61; a larger one is a malformed Track. lite-07 changelog entry.test/wasm/uniffi/cases.ts: removes the lite-06 known-gap branch. The ladder caps each timestamp at 2^61 - 1 and checks it exactly; a new local case checkswriteFramerefuses 2^61.moq-cli's timeline clamp use the new bound.quest/m1/lite07-finalize.md: lite-07 no longer waits on this quest.Public API and wire impact
Timestampconstructors and arithmetic returnTimeOverflowpast 2^61 - 1 (was 2^62 - 1). No signature changes.MIGRATE.mdentry added.@moq/net) already caps timestamps at 2^53 - 1, so it never produces one.Tests
model::time::tests::test_timestamp_fits_a_lite06_first_frameandlite::subscriber::tests::a_received_timestamp_past_2_61_is_refused; both fail with the old bound.largest_quic_sequence_reaches_the_subscriber(moq-net direct and forwarded, and through moq-relay) keeps the 2^62 - 1 sequence on lite-02, lite-06, and transport-19.Checks
On the merge of
mainat b8bb673:just check: JS, drafts, rs lint, quest, drill, py, kt, go, dart, cpp, and obs stages pass.nix flake checkfails locally building thegithub-runnerVM image (unshareis not permitted in this sandbox); CI covers it.moq-net,moq-relay,moq-cli,moq-e2ee,moq-mux,moq-tokio, andmoq-ffi(just rs test, clippy-enforced): 6088 passed.just test interop --allpassed, andjust test wasm-baseline --uniffi(headless Chromium, moq-ffi over ubrn) passed 15/15 cases under both dispatchers, includinglite: u64 above 2^53 crosses the relaywith the known-gap branch removed andwriteFrame refuses a timestamp past 2^61 - 1 -- MoqError.TimeOverflow.Overlap with moq-dev/moq#6150
#6150 landed first and drops every timestamp received over lite-05/06 (the decoders still read each one to stay in step). This PR keeps its receive bound there: a running timestamp past 2^61 - 1 is malformed whether or not the value is kept, and
a_received_timestamp_past_2_61_is_refusedpins it.Decisions
The quest asked for an explicit decision on the refusal boundary before changing behavior. The maintainer chose:
Timestampat 2^61 - 1 everywhere (this PR). Refused at the write on every version; a received larger one is a malformed track. Costs half the range: nanosecond timestamps from the Unix epoch overflow in 2043 instead of 2116, which lite-05/06 already cannot carry.js/netneeds no mirror change: itsTimestampalready refuses values pastNumber.MAX_SAFE_INTEGER(2^53 - 1), both when built and when decoded, so it never produces or holds one past 2^61 - 1.Follow-ups
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