We are happy to announce the release of 0.10.0 of Quinn, our pure-Rust implementation of QUIC. This release introduces MTU discovery, updates to the latest version of rustls, improves platform support, and introduces a variety of new features, performance improvements, and bugfixes.

Improvements

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

Documentation

• Allow initial MTU to be specified in bulk benchmark (#1456)
• Document how to close a stream correctly (#1493, thanks to @flub)
• Update wording about QUIC being a draft (#1468, thanks to @zicklag)
• Clarify async runtime support (#1497, thanks to @mxinden)
• Fix usage message (#1484, thanks to @dzvon)

Internal improvements

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

On behalf of the Quinn team, @djc and @Ralith, thanks to all contributors!