Two coupled bugs in our endpoint that the runner just surfaced:
1. The runner mounts \$CLIENT_DOWNLOADS to /downloads as a Docker volume
(per quic-interop-runner's docker-compose.yml `client.volumes`).
There is no DOWNLOADS env var. Our endpoint was reading \$DOWNLOADS,
getting null, and (for handshake/chacha20) skipping any download path.
Hard-code /downloads.
2. The handshake / chacha20 / handshakeloss testcases don't just verify
the handshake completes — they also require the requested file at
/downloads/<basename>. The runner's _check_files validator
reported "Missing files: ['intense-tremendous-firefighter']" while
our client side reported `handshake ok`. Route handshake-flavor
testcases through runTransferTest so the full H3 GET pipeline runs.
`chacha20` keeps the cipher-suite override (ChaCha20-only ClientHello);
`handshakeloss` reuses the same H3 flow against a lossy sim.
Also drops the now-dead runHandshakeTest + parseFirstTarget helpers.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
pyshark's pcap reader calls asyncio.get_event_loop_policy().get_event_loop(),
which raises RuntimeError on Python 3.14 (deprecated in 3.12, removed in
3.14). Symptom: the matrix run completes the actual interop test
successfully but the runner's pcap-validation step crashes before it can
emit the result, dropping a 100+ line traceback.
run-matrix.sh now scans for python3.13 → 3.12 → 3.11 → python3, picking
the first that's both installed and < 3.14, and creates the venv with it.
Existing venvs created with 3.14 keep working (only matters for fresh
clones); for an existing broken venv, rm -rf .venv and re-run.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Confirmed via `docker run --entrypoint find privateoctopus/picoquic:latest
/ -name picoquicdemo` — the binary isn't on PATH inside the image.
Use the absolute path so smoke runs without depending on PATH defaults.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
The privateoctopus/picoquic:latest image now wraps its CMD in the
runner's /run_endpoint.sh, which expects ROLE/TESTCASE/CERTS env vars
and exits 127 with "Unsupported test case:" if they're absent. So the
old `... privateoctopus/picoquic:latest picoquicdemo -p 4433` form
silently doesn't start picoquicdemo at all — picoquic exits, our
client times out trying to talk to a dead container.
Override the entrypoint so picoquicdemo runs directly with our args.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Even with /setup.sh skipped, the base image
(martenseemann/quic-network-simulator-endpoint) ships a /etc/resolv.conf
primed for the runner's sim that breaks Docker bridge name resolution
inside the JVM on macOS. Bypass DNS entirely: docker inspect the
picoquic container's IP and pass it directly via REQUESTS.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
The base image's /setup.sh configures routing for the runner's ns-3 sim
*and* points the container's DNS resolver at the sim's nameserver. When
we source it inside `make smoke` (which uses a plain Docker bridge
network without the sim), DNS resolution for the bridge container names
breaks: the JVM client can't resolve `amethyst-quic-interop-smoke-picoquic`
and aborts before any QUIC traffic.
Adds a SMOKE_MODE=1 env var; run_endpoint.sh skips /setup.sh entirely
when it's set. The Makefile smoke target sets it. Inside the runner
(unset, default), /setup.sh runs as before.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Two coupled fixes that surface together when running the smoke target
outside the runner's privileged sim environment:
1. run_endpoint.sh now tolerates /setup.sh failures.
The base image's /setup.sh manipulates routes for the runner's ns-3
sim. Outside the runner (e.g., make smoke without --privileged), it
fails with "netlink error: Operation not permitted" — and our
set -euo pipefail bailed before launching the JVM. The setup is
genuinely not needed for smoke; tolerate the failure and continue.
2. make smoke uses a private Docker bridge instead of --network host.
--network host on Docker Desktop for Mac is *not* the Mac host's
network — it's the LinuxKit VM's, and 127.0.0.1 isn't routed back
to other Docker containers. A dedicated bridge with DNS-by-name
works identically on Mac and Linux. Bonus: smoke-down target
reliably tears down the env.
Inside the runner these changes are no-ops: the runner provides the
privileges /setup.sh needs, and uses its own compose network not
--network host.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
run.py refuses to start if --log-dir already exists (interop.py:81-82
calls sys.exit). Previous script eagerly mkdir'd $LOG_DIR, which made
the second run always fail.
New layout: $LOG_DIR is the parent (created if missing), each
invocation writes to $LOG_DIR/run-YYYYmmdd-HHMMSS/. Preserves history
of past runs instead of overwriting; latest is `ls -t $LOG_DIR | head -1`.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Upstream quic-interop-runner split its config into implementations_quic.json
+ implementations_webtransport.json so QUIC and WebTransport endpoint
registrations don't collide. Schema is unchanged; just the filename.
Also updated the Makefile comment + plan doc for consistency.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
One-shot wrapper that clones quic-interop-runner alongside this repo if
missing, sets up its venv, merges our implementations.json snippet, builds
the endpoint image, then invokes run.py with passed-through args. Every
step is idempotent so repeated invocations just iterate.
Designed to script only the per-run loop, not first-time tooling install
(Docker Desktop, Homebrew, Wireshark prefs) — those are GUI / one-time
steps where a script either fails awkwardly or hides what the user is
consenting to.
Cross-platform install hints (apt-get on Linux, brew on macOS) on missing
prereqs. Daemon liveness check (docker info) catches the common macOS
"Docker Desktop installed but not running" trap. SKIP_BUILD=1 escape
hatch for tight image-unchanged inner loops.
Plan doc updated: run-matrix.sh is now the documented happy path; the
manual jq-merge sequence is kept as a fallback.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
The quic-interop-runner exposes several testcases that drive the same
client logic but vary the network conditions injected by the ns-3 sim.
These don't need new client code on our side — they exercise the
existing handshake / transfer paths under loss / corruption / high-RTT /
cross-traffic, which is exactly the bug-finding signal we want.
Aliases added:
- transferloss, transfercorruption, longrtt, goodput, crosstraffic
→ transfer (H3 GET against varying sim configs)
- handshakeloss → handshake
Plan doc now lists every standard testcase and either marks it landed,
aliased, or explicitly unsupported with a written reason — so anyone
returning to this knows what's left and why each gap exists. Unsupported
set covers: versionnegotiation (writer hard-codes V1), resumption /
zerortt (no session ticket / 0-RTT), keyupdate (no KEY_PHASE handling),
retry (parser exists but not wired to feed-loop), rebinding-* (no client
migration), amplificationlimit (server-side), blackhole (inverse test),
ipv6 (UdpSocket v6 path unverified).
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Adds a minimal Http3GetClient (in :quic-interop, NOT :quic — interop-test
surface, not a production HTTP/3 client) that opens the three required
client uni streams (control + QPACK encoder + QPACK decoder per RFC 9114
§6.2.1), sends an empty SETTINGS, and per request opens a bidi stream,
encodes the four pseudo-headers via the existing literal-only QpackEncoder,
FINs, and reassembles HEADERS+DATA frames from the response.
Wires three testcases:
- transfer: GET each REQUESTS URL sequentially, write body to
\$DOWNLOADS/<basename>. status != 200 fails.
- http3: identical to transfer.
- multiplexing: same fetches but issued in parallel via
coroutineScope { async { … } } so request streams genuinely
overlap on the wire (what tshark verifies).
Out-of-scope (deliberate): GOAWAY, PUSH_PROMISE, dynamic QPACK table,
trailers, priority — none are required by these testcases.
Unit-tests round-trip the request encoding through the existing
Http3FrameReader + QpackDecoder so the wire format is verified without
needing a real peer.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Refactors SslKeyLogger to take the ClientHello random at flush() time
(removes the lookup-lambda + bindConnection ceremony) so the formatter
is testable without spinning up a real QuicConnection. Adds three
unit tests covering: the four NSS Key Log lines emitted in the right
order, flush idempotency, and lower-case hex encoding.
Also drops a checked-in implementations.json snippet
(quic-interop-runner-snippet.json) so a sibling clone of the runner
can be registered with one jq merge instead of hand-edited JSON.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Adds two debugging hooks to :quic so the interop endpoint can produce
artifacts that make the runner actually useful for finding bugs:
- TlsClient.clientRandom: capture and expose the 32-byte ClientHello
random so a SSLKEYLOG line can correlate to this connection.
- QuicConnection.extraSecretsListener: optional chained secrets
listener (default null, no-op for production callers). Fires
alongside the connection's own key-installation listener at every
encryption-level transition.
- QuicConnection.cipherSuites: knob to override the offered TLS
cipher suites in ClientHello.
InteropClient now:
- Writes NSS Key Log Format lines to $SSLKEYLOGFILE when set, so
Wireshark can decrypt the sim's pcap captures.
- Implements the `chacha20` testcase by offering only
TLS_CHACHA20_POLY1305_SHA256 — exercises the ChaCha20 AEAD path
end-to-end against a peer.
Defers QLOGDIR (needs qlog observer infrastructure across packet/
frame/recovery layers — own design doc) and `versionnegotiation`
(needs the writer to accept a configurable initial QUIC version).
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Adds :quic-interop, a JVM-only module at quic/interop/ that implements
the quic-interop-runner Docker contract so we can drive matrix tests
against aioquic / quiche / picoquic / msquic / ngtcp2 / etc. as a
bug-finding harness.
Phase 0 supports only the `handshake` testcase; everything else returns
127 so the runner skips rather than fails. SSLKEYLOGFILE / QLOGDIR
plumbing is deferred to Phase 1.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT
Claude