v1.76.0

Release Summary:

• feat(s2n-quic-dc): Support client TLS streams
• feat(s2n-quic-dc): Split out missing credentials from Local errors
• fix(s2n-quic-dc-metrics): Fix panic on large Counter increments (>u32::MAX)

What's Changed

Other Changes 🔧

• fix(s2n-quic-dc): limit background handshake concurrency by @Mark-Simulacrum in #2968
• fix(ci): trigger title check upon pull request and title update by @jouho in #2984
• feat(s2n-quic-dc): Split out unknown path secret in acceptor from Local errors by @Mark-Simulacrum in #2985
• feat(s2n-quic-dc): Initial client TLS streams support by @Mark-Simulacrum in #2983
• chore(s2n-quic-transport): fix typos for naturally by @boquan-fang in #2994
• build(deps): update rand to v0.10 by @boquan-fang in #2987
• fix(s2n-quic-dc-metrics): Avoid panicking in Counter::increment with >u32::MAX count by @Mark-Simulacrum in #2995
• chore(s2n-quic): v1.76.0 release by @maddeleine in #2996

Full Changelog: v1.75.0...v1.76.0

v1.75.0

Release Summaries:

• Fix incrementing deduplicated metrics for initial handshake entry #2980
• Expose PathSecretId from stream handles #2973
• Add From net::IpAddr impl for IpAddress #2979
• Split TCP stream connect errors further #2971

What's Changed

Other Changes 🔧

• chore(s2n-quic-dc) Add path secret state builder by @mhelkey in #2950
• chore(s2n-quic-dc): use cfg_if for gating in io.rs by @boquan-fang in #2969
• ci(interop): bump network simulator image by @kaukabrizvi in #2972
• chore(s2n-quic-transport): use try_recv from futures_channel crate by @boquan-fang in #2977
• fix(s2n-quic-dc): Fix incrementing deduplicated metrics by @Mark-Simulacrum in #2980
• feat(s2n-quic-dc): expose PathSecretId from stream handles by @Mark-Simulacrum in #2973
• Add Fromnet::IpAddr impl for IpAddress by @Mark-Simulacrum in #2979
• feat(s2n-quic-dc): Split TCP stream connect errors further by @Mark-Simulacrum in #2971
• chore(s2n-quic): v1.75.0 release by @boquan-fang in #2982

New Contributors

• @kaukabrizvi made their first contribution in #2972

Full Changelog: v1.74.0...v1.75.0

v1.74.0

Release Summary:

Fix MtuProbingComplete frame bugs in s2n-quic-core and s2n-quic-dc.

What's Changed

Other Changes 🔧

• fix: send frame during inital probing and add event for dc endpoints by @boquan-fang in #2944
• chore: s2n-quic release 1.74.0 by @boquan-fang in #2966

Full Changelog: v1.73.0...v1.74.0

v1.73.0

Release Summary

• dcQUIC endpoints won't send MtuProbingComplete frame if their peers don't support that frame. #2958
• Bump MSRV to 1.88.0. #2935
• fix(s2n-quic-dc): Retry binding to same port on UDP + TCP for longer. #2948

What's Changed

Other Changes 🔧

• docs: Adds some caveats to the datagram documentation by @maddeleine in #2933
• chore(s2n-quic): bump MSRV to 1.88.0 by @boquan-fang in #2935
• ci: address flaky fuzz test by @jouho in #2934
• ci(QNS): Revert "temporarily disable neqo (#2724)" by @boquan-fang in #2936
• fix(s2n-quic-core): one more effort to acquire credits in worker by @boquan-fang in #2939
• chore(s2n-quic-tests): use ConnectionInfo from s2n_quic by @boquan-fang in #2942
• feat(s2n-quic-dc): Support path secret eviction upon UnknownPathSecret packet by @mhelkey in #2943
• CI: update typos.toml for msg_controllen and cpy by @boquan-fang in #2953
• fix(s2n-quic-dc): Retry binding to same port on UDP + TCP for longer by @Mark-Simulacrum in #2948
• fix: MtuProbingComplete shouldn't be sent if peer doesn't support it by @boquan-fang in #2958
• chore(s2n-quic): v1.73.0 release by @boquan-fang in #2959

New Contributors

• @mhelkey made their first contribution in #2943

Full Changelog: v1.72.0...v1.73.0

v1.72.0

Release Summary

• Fix MtuProbingCompleteSupport transport parameter encoding.

What's Changed

Other Changes 🔧

• chore(s2n-quic-dc): allow usage of deprecated set_linger method in tokio by @boquan-fang in #2930
• fix(s2n-quic-core): MtuProbingCompleteSupport transport parameter encoding by @boquan-fang in #2931
• chore(s2n-quic): v1.72.0 release by @boquan-fang in #2932

Full Changelog: v1.71.0...v1.72.0

v1.71.0

Release Summary

• Add source breakdown for tcp_io_errors #2915.
• Applications can thread application-specific context from connection attempts to their Subscriber implementations. Track de-duplicated requests by reason, allowing subscribers to access the information. #2920
• Add MtuProbingComplete dc extension frame to achieve synchronization. #2919

What's Changed

Other Changes 🔧

• s2n-quic-dc: split acceptor error events by source by @Mark-Simulacrum in #2915
• feat(s2n-quic-core): add MtuProbingComplete frame by @boquan-fang in #2919
• feat(s2n-quic-dc): Track de-duplicated handshake requests and support metrics on the reason by @Mark-Simulacrum in #2920
• chore(s2n-quic): v1.71.0 release by @boquan-fang in #2921

Full Changelog: v1.70.0...v1.71.0

v1.70.0

Release Summary

• Set application context of s2n-tls connection with the server's connection info (currently local + remote address).

What's Changed

Other Changes 🔧

• docs: Adds missing documentation for connection limits by @maddeleine in #2885
• ci: replace #2881 with a GHA to check PR titles for conv. commit. by @dougch in #2886
• ci: skip validate-pr-title when merged to main by @CarolYeh910 in #2893
• refactor(s2n-quic-dc): shared caches improvements by @mehnazyunus in #2883
• chore(xdp): pin aya to prevent clippy/MSRV breakage by @dougch in #2897
• Revert "chore(xdp): pin aya to prevent clippy/MSRV breakage (#2897)" by @boquan-fang in #2902
• ci: exculde dc from cargo timing job by @jouho in #2903
• refactor(build): make cargotiming to build and test for workspace by @boquan-fang in #2904
• refactor(s2n-quic-core): use core::net::SocketAddr by @WesleyRosenblum in #2913
• chore(ci): add logic to track CI runtime by @boquan-fang in #2912
• feat(s2n-quic-tls): record server's ConnectionInfo in s2n-quic's TLS Connection by @boquan-fang in #2906
• chore(s2n-quic): s2n-quic v1.70.0 release by @boquan-fang in #2916

Full Changelog: v1.69.0...v1.70.0

v1.69.0

Release Summary

• feat(s2n-quic-dc): throttle repeated successful handshakes.
• feat(s2n-quic): Allow creating server names in const contexts.
• opt(s2n-quic-dc): only read-lock once in happy path.
• feat(s2n-quic): Expose &dyn Error for TLS handshake failures in events.
• feat(s2n-quic-dc): Add events measuring write lock latency.
• Implement s2n-quic-dc-metrics crate to emit metrics for s2n-quic-dc.

What's Changed

• feat(s2n-quic-dc): throttle repeated successful handshakes by @Mark-Simulacrum in #2845
• tests: Include integ test Message representation in ring buffer tests by @boquan-fang in #2852
• Expose static server name constructor by @Mark-Simulacrum in #2865
• opt(s2n-quic-dc): only read-lock once in happy path by @Mark-Simulacrum in #2867
• Expose TLS error to Subscribers using on_tls_handshake_failed by @Mark-Simulacrum in #2855
• chore: add xquic back to CI by @boquan-fang in #2868
• feat(s2n-quic-dc): Reuse handshakes across application processes by @mehnazyunus in #2854
• feat(s2n-quic-dc): Add events measuring write lock latency by @Mark-Simulacrum in #2869
• feat(s2n-quic-tests): implement a blocklist for test events by @boquan-fang in #2872
• chore: Clippy stuff by @maddeleine in #2879
• refactor(s2n-quic-dc): disable restart test on MacOS by @boquan-fang in #2839
• test(s2n-quic-dc): shared caches tests by @mehnazyunus in #2876
• fix(s2n-quic-dc): support ipv6 control sockets by @camshaft in #2871
• ci: GH release notes config by @dougch in #2880
• ci: Add a conv. commit lint action+config by @dougch in #2881
• fix(ci): copyright check improvement by @boquan-fang in #2890
• feat(s2n-quic-dc): implement metrics for s2n-quic-dc by @boquan-fang in #2884
• chore: s2n-quic 1.69.0 release by @boquan-fang in #2891

Full Changelog: v1.68.0...v1.69.0

v1.68.0

Release Summary

• Add packet encoding and decoding for packets sent over Unix domain sockets. This is required for reusing dcQUIC handshakes between application processes.
• Creates a sender and receiver for Unix domain sockets. This handles a message along with a file descriptor as ancillary data.

What's Changed

• feat(s2n-quic-dc): Add Unix socket packet encoding/decoding by @mehnazyunus in #2840
• refactor(s2n-quic-rustls): replace deprecated rustls-pemfile with rustls-pki-types by @junkurihara in #2847
• chore: fix group in CODEOWNERS by @dougch in #2848
• chore(ci): allow triage users to start quic-attack by @dougch in #2843
• feat(s2n-quic-dc): Add Unix domain socket sender/receiver by @mehnazyunus in #2842
• chore: scope permissions down for one GHA by @dougch in #2849
• ci(dhat): upload dhat artifacts regardless of steps outcome by @boquan-fang in #2850
• chore: s2n-quic 1.68.0 release by @boquan-fang in #2853

Full Changelog: v1.67.0...v1.68.0

v1.67.0

Release for Oct 8 2025

What's Changed

• refactor(s2n-quic-tests): add test annotation to endpoint_limits_close_test by @boquan-fang in #2816
• refactor(s2n-events): Move OutputMode into OutputConfig by @goatgoose in #2803
• opt(s2n-quic-dc): clamp TCP server concurrency by @Mark-Simulacrum in #2827
• fix: Change MTU test setup so it isn't slow by @maddeleine in #2828
• opt(s2n-quic-dc): Further tweak TCP acceptor concurrency by @Mark-Simulacrum in #2829
• feat(s2n-events): Add config option to generate C API by @goatgoose in #2818
• fix(s2n-quic-dc): send connection close frames with pruned streams by @camshaft in #2831
• feat(s2n-quic-dc): add packet-level events by @camshaft in #2832
• refactor(s2n-quic-dc): Add trait for TCP WorkerState poll behavior by @mehnazyunus in #2836

New Contributors

• @github-actions[bot] made their first contribution in #2822
• @mehnazyunus made their first contribution in #2836

Full Changelog: v1.66.0...v1.67.0