Files
amethyst/quic
Claude be96d4b28f fix(quic): RFC 9000 §3.2 stream state — STREAM after RESET_STREAM rejected
Once the peer has sent RESET_STREAM the receive side enters the "Reset
Recvd" terminal state per §3.2; any subsequent STREAM frame on that id
is a peer protocol violation and MUST close the connection with
STREAM_STATE_ERROR.

Pre-fix the parser silently absorbed the bytes — a peer that violated
the spec would leave us with a phantom mid-reset stream the peer
believed was already dead, with reset/byte bookkeeping diverging.

Implementation: a per-stream `peerResetReceived: Boolean` flag set in
the RESET_STREAM handler and checked at the top of the STREAM handler.
The flag is independent of our local-side `resetState` (which tracks
OUR RESET emission).

Test: `StreamAfterResetTest` (4 cases) covers STREAM-after-reset
closure, FIN-bearing STREAM-after-reset, the legal FIN-then-RESET
shape (no false-positive), and per-stream isolation (reset on stream 3
doesn't poison stream 7).

https://claude.ai/code/session_01XGmmaVuy2wsSZQx2AqN2ik
2026-05-09 04:46:49 +00:00
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