28693419016
96%

Ran 04 Jul 2026 03:25AM UTC

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Files 24

Run time 1min

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Committed 04 Jul 2026 03:09AM UTC coverage: 96.752% (-0.1%) from 96.847%

Build # 28693419016

Build Type

push

github

Committed by

floatdrop

Commit Message

docs: kTLS design — sans-io handshake + manual key install, sequence-free switchover

Option A (SSL_OP_ENABLE_KTLS, OpenSSL-driven) rejected: it needs a
socket-BIO handshake driven by a readiness op (a second I/O model in
the worker), a vendored-OpenSSL rebuild (OPENSSL_NO_KTLS today), and a
post-handshake BIO swap for the fallback. Option B chosen: the shipped
BIO-pair handshake stays; keys come from the keylog callback (present
in any build) and std.crypto.tls.hkdfExpandLabel; the kernel install
is a sync setsockopt seam. The sequence-number problem is eliminated
rather than computed: switch only when zero application-epoch records
have flowed (verified by counting record boundaries in the ciphertext
staging), otherwise the connection stays on the pair relay — a missed
switch costs performance, never correctness. Post-switch control
records tear down (KeyUpdate degrades to reconnect); our close_notify
rides a new sendmsg-with-cmsg ring op. Channel freed at switchover, so
kTLS connections hold ~zero TLS heap while streaming. Facts verified:
kernel 1.3 RX + cmsg contract (docs.kernel.org), CONFIG_TLS=m on the
dev box, hkdfExpandLabel pub in the pinned std, keylog available
without a rebuild. Six sub-slices recorded in §6.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Coverage Stats

5124 of 5296 relevant lines covered (96.75%)

0.97 hits per line

Coverage Regressions

Lines	Coverage	∆	File
5	78.95	-13.16%	mem/futex_mutex.zig

Jobs

ID	Job ID	Ran	Files	Coverage
1	28693419016.1	04 Jul 2026 03:25AM UTC	24	96.75	GitHub Action Run

floatdrop / zoxy / 28693419016
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