quiche: inherit PMTUD on runtime paths - #2573
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Connections configured for PMTU discovery currently create migration paths without PMTUD state, so path revalidation cannot measure the replacement route. - Persist the effective PMTUD enablement and probe-attempt settings on the connection - Initialize client- and server-created runtime paths with PMTUD state - Defer PMTU probes until the new path has completed QUIC validation - Add migration coverage for both runtime path constructors Generated with [Codex](https://github.com/openai)
idy
marked this pull request as ready for review
August 7, 2026 04:44
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What changed
Why
The initial path is created with
Some(config)and receives PMTUD state, butpaths created after the handshake pass
NonetoPath::new. A migratedconnection therefore cannot discover or revalidate the replacement path's MTU.
This intentionally does not include the send-path state correction proposed in
#2566.
Closes #2572.
Validation
cargo +nightly fmt --all -- --checkcargo test -p quiche runtime_paths_inherit_pmtud_configuration --lib