Files
OpenFUT/openfut-adapter-fifa17
funman300 04c5043aba utas: My Squad filter corpus — every filter identified, root cause measured
Controlled retail capture, one criterion at a time, cleared between each.
47 transactions. Every filter the My Squad picker sends is now known from
the wire rather than guessed.

Route: GET /ut/game/fifa17/club -- the picker hits UTAS and reuses the
general club-inventory route.

  level=any|gold        quality      lowercase, ALWAYS present
  rare=SP               "Special"    uppercase, OMITTED when off
  position=ST           position     uppercase, omitted when off
  nation=52             entity id    numeric
  league=13             entity id    numeric
  team=5                entity id    numeric, NESTED under league
  sort=desc                          client constant; the UI has no sort control
  start=/count=11       pagination

Two encoding families: short string enums, and numeric FIFA ids. The ids
must never reach Core. Filters compose as plain ANDs in one query --
string and id filters alike -- so each maps independently.

THE ROOT CAUSE IS SELF-AMPLIFYING.

club_route honours type, team and league; it never reads start, count,
level, sort or year. Because start is ignored, every page returns the
same full set, so the client concludes the page was full and asks for the
next one. One scroll produced 22 requests and 6.2 MB, stopping at
start=200 only because the client gave up -- against a filtered set of 32
items that should have been three pages.

That also explains why the bug reads as erratic rather than broken:
league=13&position=ST returns every Premier League player instead of
Premier League strikers. Plausible, wrongly sized, hard to notice.

Measured filtered sets, from the real cluttered club -- these are the
acceptance test for the fix:

  unfiltered            1962
  league=13              350
  league=13&team=5        32

Two client behaviours worth carrying forward: the picker fires a query
per highlighted entry, not per selection (two requests for one club
pick), and parameter ORDER is not stable, so parsing must be key-value.

FIXTURE SIZE: bodies over 4 KB are truncated in the committed fixture,
with body_full_len and body_full_sha256 retained, because the same 1.1 MB
club response repeats ~25 times and its hash already proves identity.
13.3 MB -> 247 KB. The raw .ofcap keeps every byte, privately and
gitignored. Truncation is recorded per transaction so a trimmed fixture
is never mistaken for a whole response.

Audited across all three identifier surfaces -- headers, JSON bodies,
query strings -- before and after the size change: no leaks. 6/6
sanitiser mutations still killed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-11 19:32:57 +00:00
..

openfut-adapter-fifa17

The FIFA 17 game adapter. Everything true of FIFA 17 specifically lives here, so that neither OpenFUT Core nor the generic protocol crates have to know about it.

  openfut-protocol-blaze   generic Blaze: Fire2 framing, Heat2/TDF codec
           ▲
  openfut-adapter-fifa17   THIS: command tables, response bodies, dispatch order
           ▲
  OpenFUT Core             game-independent FUT domain (not yet wired)

Status

Surface Port State
Blaze / Fire2 RPC 42130 Implemented, byte-for-byte parity-tested
Redirector (HTTPS + XML) 42127 Python only
Nucleus OAuth stub 42131 Python only
LSX / Origin 4216 Python only
Roster XML 8081 Python only
UTAS / RS4 8099 Python only
POW / EASFC 8094 / 8080 Python only

Nothing here is wired into the running backend. The crate answers frames; it opens no socket, terminates no TLS and owns no runtime. The Python backend remains the live service and the behavioural oracle.

What the adapter owns, and what it must not

Owns: component/command/notification IDs, response body shapes, dispatch ordering, session identity, the fetchClientConfig tables.

Must not own: FUT domain state. Blaze is an auth/session/config protocol — no coins, packs, clubs or squads appear on this wire — so Session holds a session key, a locale, a service name, an auth code and a flag, and that is all. When UTAS is migrated that boundary will need active defending; here it comes free.

Parity

./check-parity.sh          # oracle freshness + byte-for-byte replay
./check-parity.sh --regen  # after an intentional oracle change

fixtures/blaze_transactions.jsonl holds 49 request→response(s) transactions produced by calling the real blaze_responder_v3b.dispatch(). They replay in order against a shared session per connection, so ordering-dependent behaviour is exercised rather than assumed: preAuth captures the locale that later ALOC fields echo, and login sets the auth code getAuthToken returns afterwards.

Comparison is byte-for-byte including frame count and order — a missing post-login notification or a reply where the oracle stays silent fails here.

The suite was mutation-tested: swapping two post-login notifications, flipping one enum deep inside AccountInfo, and hardcoding an address in utas_base()/nucleus_base() were each verified to turn it red. The third initially did not, because the config templating had made those helpers dead code; the table now templates on URL-level tokens so they are the single place a URL shape is defined.

Three behaviours that are easy to get wrong

  • Login answers with four frames, in order: reply, then UserAuthenticated, UserSessionExtendedDataUpdate, UserAdded.
  • An unimplemented RPC still gets an empty reply. Silence makes the client wait for a timeout; an empty reply lets every field fall back to a client-side default and the boot continues.
  • Non-request message types get nothing at all.

No error replies are emitted. msgType 3 exists, but the error-code placement is UNRESOLVED — three clean-room sources disagree between header[14:16], a metadata ERRC, and a payload CNTX/ERRC — so emitting one would be a guess on the wire.

The client config table

fixtures/client_config.json carries 227243 rows per CFID, generated from the Python oracle and templated on {utas_base}, {nucleus_base}, {pow_content_url}, {advertise}, {bind}, {pow_host}. It is reverse-engineered data, not logic, and deriving it mechanically removes a class of transcription typo no reviewer could catch. The generator does not take its own templating on trust: it substitutes real addresses back in and diffs against the oracle for every section before writing the file.

The table must be complete, not representative. The client resolves a per-call key (FUT_RS4_URL_<CALL>) before a per-module one, and any unresolved call falls back to a real, dead EA host — that is what produced "there has been an error connecting to FIFA 17 Ultimate Team" mid-session when only the boot subset was served.

Known defect reproduced deliberately

nucleusConnect and nucleusConnectTrusted are built from the bind address, not the advertised one. On the live split deployment that means the backend tells a client on another machine to reach Nucleus at http://0.0.0.0:42131, which it cannot. Verified against the running container, not inferred.

This is reproduced exactly, because it is what the only proven-working configuration does and changing it would break parity. It also implies the Nucleus stub is not actually reached in the current remote flow. Fixing it is a separate change that needs live validation — see the vault.

Configuration

Nothing is hardcoded. AdapterConfig carries Identity (persona, ids, email, namespace, entitlement group, …) and Endpoints (advertise, bind, POW hosts, telemetry/ticker/QoS ports). Default gives the project's synthetic offline identity on loopback; a remote deployment must override advertise.

Bind and advertise are deliberately distinct: an advertised URL must carry the address the client can reach, which on a two-machine deployment is not the address the server binds.