Config gained a max_actors: Option<usize> (None = smarm's DEFAULT_MAX_ACTORS
of 16_384). serve_with now applies it to the smarm runtime config, so the
per-connection actor slab can be sized to the deployment's peak concurrent
connections. Since each connection is one actor, the slab was the hard cap
on concurrent connections (previously an un-raisable 16_384) regardless of
RAM/fds; slots are ~256 B so raising it is cheap next to per-conn stacks.
Verified on the GPU box: default caps at 16_383 held connections; with
max_actors raised, a paced ramp holds 100_000 concurrent slow-header
connections at 12.4 KB RSS / 2 VMAs each (1.29 GB total) on one pinned core.
The TE arm set chunked whenever the token appeared anywhere in the value,
so 'chunked, gzip' (chunked not final) was accepted and an unknown coding
like 'bogus' was treated as no-body (h1spec #18/#19 -> 404). Collect the
ordered coding list across all TE headers and decide post-loop: TE on
HTTP/1.0 or TE+Content-Length -> 400 (the CL check now covers ANY TE, not
just chunked, closing the old TE:unknown + CL smuggling gap); chunked
present but not final -> 400; any coding other than chunked -> 501 via a
new UnknownTransferCoding variant (emit_error_response gains the 501 arm);
only a sole final chunked sets the flag. Tests cover each branch.
Note: the dead Unsupported/411 variant is left as-is (separate cleanup).
The content-length arm ran content_length = Some(parse) per header, so a
second Content-Length silently overwrote the first with no conflict check
(CL.CL request smuggling; h1spec #21 -> 404 instead of 400). Count
occurrences and reject any duplicate post-loop, strictly (even equal
values), reusing BadContentLength (400). A single value is still required
to be one decimal integer, so a comma-list or non-numeric keeps failing at
parse as before. Tests: differing dup, equal dup, single-CL regression.
parse_head never inspected Host, so a missing (HTTP/1.1), duplicate, or
syntactically invalid Host all passed through to the router (h1spec #8/#9/
#10 -> 404 instead of 400). Add per-header validity (RFC 3986 host[:port]
charset via valid_host) plus a post-loop presence/uniqueness check: 1.1
MUST carry exactly one valid Host; 1.0 may omit it but a duplicate/invalid
one is still 400. Unit matrix mirrors the three h1spec cases with reg-name/
port/IPv6-literal positive controls.
RFC 019 lands upstream: per-actor stacks, park-path shrink, recycle zap,
SIGSEGV diagnostics, introspect surface. No urus code changes required —
E1 interleaved A/B on the box shows every ka cell within +0.3..+2.9% of
the v0.5.0 pin (t8-c4 close-mode control is bistable either side; see
smarm v0.6.0 release notes). Tag must exist upstream before this builds:
push smarm master + v0.6.0 first.
Claude (sandbox)