0.10 release planning

[djc]

Time to start talking about the next semver-incompatible release, I guess?

We definitely want to wait for:

• Initial support for PLPMTUD #1510

Other things to consider:

• Should we try to get Unify connection and endpoint drivers #1219 in?
• How do we plan for QUIC V2? (It seems to be sitting in some late part of the IETF review queue, with seemingly all the reviews done. Does this impact our public API?)

Should we consider bumping the next version to 1.0? Our API has been pretty stable...

[mxinden]

Should we try to get #1219 in?

That would be wonderful! 🙏

[Ralith]

I'd like to include mechanics for enabling MTUD automatically where supported (some sort of PlatformConfig?), since most users won't and shouldn't need to bother with target-specific configuration.

How do we plan for QUIC V2?

IIRC QUIC V2 is mainly an anti-ossification measure that won't impact public API. It'd be healthy for us to have it but I don't think it's pressing. Might bear a double-check.

Should we consider bumping the next version to 1.0?

I agree we're getting close, but if we're going to treat 1.0 as special we should probably defer a decision until we've actually not broken for a good while. Alternatively, we could abandon cosmetic concerns and just start bumping the major version without a care.

[mxinden]

How do we plan for QUIC V2?

IIRC QUIC V2 is mainly an anti-ossification measure that won't impact public API. It'd be healthy for us to have it but I don't think it's pressing. Might bear a double-check.

Correct, see:

This document specifies QUIC version 2, which is identical to QUIC version 1 except for some trivial details. Its purpose is to combat various ossification vectors and exercise the version negotiation framework. It also serves as a template for the minimum changes in any future version of QUIC.

Note that "version 2" is an informal name for this proposal that indicates it is the second standards-track QUIC version. The protocol specified here uses a version number other than 2 in the wire image, in order to minimize ossification risk.

https://datatracker.ietf.org/doc/draft-ietf-quic-v2/

[abonander]

Should we consider bumping the next version to 1.0?

As long as rustls is part of the public API, I wouldn't recommend that.

[Ralith]

Should we try to get #1219 in?

As much as I'd love to get this merged finally, it doesn't need to be a blocker since it's not API-breaking, and can easily be included in a patch release. If it continues to be a difficult review it probably shouldn't delay the other more practically beneficial changes we have staged.

[djc]

We should probably get #1529 in before release. I think that's probably the only thing blocking the release at this point?

[Ralith]

I think so; I should be able to review that within the next few days.

[XOR-op]

Since #1529 has been merged, should we plan to release 0.10? It looks like all the checkpoints have been resolved.

[djc]

We should review #1545 and #1547 before we decide to release. I think those will be relatively straightforward, though.

[djc]

Draft changelog:

• Initial support for PLPMTUD (Initial support for PLPMTUD #1510 with followup in Tie up PLPMTUD's loose ends #1529, thanks to aochagavia)
• Bump rustls to 0.21.0 (quinn-proto v0.10.0 w/ rustls v0.21.0 #1515, thanks to cpu)
• Fix: build and tests on FreeBSD 13.2 (Fix: build and tests on FreeBSD 13.2 #1555, thanks to Tirka)
• Fail FreeBSD CI if any step fails (Fail FreeBSD CI if any step fails #1557, thanks to Tirka)
• Fragmentation handling improvements (Fragmentation handling improvements #1547)
• Add missing exports of stats types (Add missing exports of stats types #1546)
• Rename min_guaranteed_mtu to min_mtu for clarity (Rename min_guaranteed_mtu to min_mtu for clarity #1552)
• Duplicate Transmit and EcnCodepoint across -proto and -udp (Duplicate Transmit and EcnCodepoint across -proto and -udp #1541)
• quinn: take Arc<dyn Runtime> directly (quinn: take Arc<dyn Runtime> directly #1534)
• Support external crypto implementations (Support external crypto implementations. #1496, thanks to nmittler)
• Do not require &mut self in AsyncUdpSocket::poll_send (Do not require &mut self in AsyncUdpSocket::poll_send #1519, thanks to dignifiedquire)
• Getters for stream concurrency metrics and related documentation (Getters for stream concurrency metrics and related documentation #1518, thanks to FlorianUekermann)
• Fallback to not using ECN if IP_TOS is not supported (Fallback to not using ECN if IP_TOS is not supported #1516, thanks to link2xt)
• Implement fallback for sendmmsg and recvmmsg (Implement fallback for sendmmsg and recvmmsg #1504, thanks to link2xt)
• Borrow self in read_to_end, rather than consuming (Borrow self in read_to_end, rather than consuming #1502)
• Improve error when connecting with an unsupported version (Improve error when connecting with an unsupported version #1482)
• Fix racy Endpoint::wait_idle (Fix racy Endpoint::wait_idle #1477)
• Re-export udp::{RecvMeta, UdpState} for AsyncUdpSocket (Re-export udp::{RecvMeta, UdpState} for AsyncUdpSocket #1476, thanks to XOR-op)
• Route logs via log crate by default when tracing isn't used (Route logs via log crate by default when tracing isn't used #1473)
• Fail gracefully on attempts to connect to an unspecified IP address (Fail gracefully on attempts to connect to an unspecified IP address #1474)
• add FreeBSD IP_RECVDSTADDR support (add FreeBSD IP_RECVDSTADDR support #1447, thanks to lucifer9)
• udp: add safe wrapper for setsockopt() (udp: add safe wrapper for setsockopt() #1461)

Documentation

• Allow initial MTU to be specified in bulk benchmark (Allow initial MTU to be specified in bulk benchmark #1456)
• Document how to close a stream correctly (Document how to close a stream correctly #1493, thanks to flub)
• Update wording about QUIC being a draft (Update Wording About Quick Being a Draft #1468, thanks to zicklag)
• Clarify async runtime support (docs(quinn): remove restriction to tokio #1497, thanks to mxinden)
• Fix usage message (Fix usage message #1484, thanks to dzvon)

Internal improvements

• Allow benchmarking without packet protection (Add dangerous_packet_null_cipher feature to disable packet encryption. #1436, thanks to stormshield-damiend)
• Fix no-protection option in perf crate (Fix no-protection option in perf crate #1550, thanks to aochagavia)
• Don't rely on sleeping in 0-RTT test (Don't rely on sleeping in 0-RTT test #1522)
• Update deny.toml (Update deny.toml #1470, thanks to NukeManDan)
• Bump quinn-proto version (Bump quinn-proto version #1520, thanks to nmittler)
• Clippy fixes (Clippy fixes #1466, thanks to StygianLightning)
• Bump MSRV to 1.63 (Bump MSRV to 1.63 #1548)
• Bump quinn-udp version to 0.4 (Bump quinn-udp version to 0.4 #1535, thanks to link2xt)

[Ralith]

Rename min_guaranteed_mtu to min_mtu for clarity

This is a bit confusing as a literal changelog entry because in 0.9 the parameter was called initial_max_udp_payload_size.

udp: add safe wrapper for setsockopt()

This is purely internal.

LGTM otherwise!