Rejected with the required error code 0x105.
The client did what the clause requires.
What was measured
- Client
- neqo — neqo (Firefox), 0.31.1
- Test
- SETTINGS frame on a request stream —
h-settings-on-request-stream - Clause
- RFC 9114 §7.2.4 (MUST)
- Class
- correctness — Rejected something invalid, with the code the RFC names.
- Required behaviour
- Close the connection with H3_FRAME_UNEXPECTED. SETTINGS belongs to the control stream alone: §7.2.4 says that if an endpoint receives one on a different stream it "MUST respond with a connection error of type H3_FRAME_UNEXPECTED".
- Measured
- 2026-09-18
Reproduce it
The suite is the judge, so the reproduction is to point the same client at the same test and let the server report what it saw.
SESSION=$(curl -sX POST https://conformance.pqcrypta.com/session | jq -r .id)
# then drive neqo at the test URL and read the verdict:
curl -s https://conformance.pqcrypta.com/report/$SESSION.json | jq '.results["h-settings-on-request-stream"]'