d6fbd04ef346872aa650f51bfb9b24027a66c8bf
tests/vendor-differential.rs pins the vendored extraction's RFC edge behavior as explicit bytes, per vendor.md §Maintenance Posture (the differential-testing contract; ADR-011): - negotiation: empty/zero method lists -> 0xff, server-order method preference, 0x04 greeting refusal before the methods byte, EOF mid-handshake typed error, password sub-protocol EmptyUsername/ EmptyPassword + the 0x01/0xff-then-error reject path - command reads: unknown command -> 0x07 reply, RSV != 0 tolerance (upstream reads it unchecked), ATYP 0x02/0x05 -> 0x08, the 255-byte domain wire maximum, truncated v4/domain address errors - reply forms (new_reply regression guard): 10/22-byte shapes, constant VER/RSV across codes, zero-addr error replies, caller sock_addr verbatim on success - client session: per-code ReplyError mapping (incl. the 0x06 double map), domain request encoding, UDP-ASSOCIATE zero-target fallback form, skip_auth emits no greeting - UDP codec: GarbageInReserved, FRAG passthrough (the parser returns it; refusing is the caller's job), v6 round-trip, payload split - transfer/wait_on_tcp: pump both directions to completion, EOF on clean close, UnexpectedUdpControlGarbage carries the byte Every non-obvious expectation names the upstream behavior it pins (file + line in /workspace/fast-socks5, v1.0.0); the reference is consulted, never linked — no build-time dependency. Duplex pairs only (no TcpListener/UdpSocket/tokio::net in test code). Verification: cargo test (37 unit + 32 differential), cargo test --all-features (identical), cargo clippy --all-targets -- -D warnings, cargo fmt --check, cargo check --target wasm32-unknown-unknown — all clean. Task: tasks/implementation/vendor-differential-tests.md (status -> completed).
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