funman300
4fd5ee2608
"TLS HANDSHAKE FAILED: ... unexpected EOF" is exactly how the certificate mismatch presented -- the defect that cost three live gate attempts and was invisible everywhere else. It is the one line this project has learned to treat as serious. A reachability probe forges it for free: TcpStream::connect followed by a drop opens the connection and closes without sending a byte, and the acceptor reports that as "unexpected EOF". The launcher's preflight makes two such probes per run. On 2026-08-12 they produced ten of these lines and sent a whole session diagnosing a client-side fault that did not exist -- autopatch, ptrace_scope and client_arm.sh were all investigated before the pairing of the timestamps gave it away. Classify before the acceptor sees the connection: peek one byte, and treat EOF-before-any-byte as a probe with its own quiet line. A timeout is deliberately NOT a probe -- a slow or broken client must still reach the acceptor and produce a real diagnostic, since misclassifying a fault as benign would defeat the point. The counter exists because the test needs it. A probe produces no response either way, so a test written against client-visible behaviour passes with the classification deleted; asserting on a count is what makes the mutation detectable. Verified: all three mutations (drop the classification, treat undetermined as a probe, treat a speaking client as a probe) are killed. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
OpenFUT
Offline Ultimate Team — like SPT, but for FIFA 23.
OpenFUT replaces EA's retired FUT servers with a fully offline, single-player backend. You own FIFA 23 legitimately. You just want to keep playing after EA shut down the servers.
Repositories
| Repo | Purpose |
|---|---|
openfut-core |
Game-independent offline FUT backend |
openfut-bridge |
FIFA 23 integration layer + reverse-engineering proxy |
Architecture
FIFA 23 client
│
▼
┌─────────────────┐
│ openfut-bridge │ ← intercepts FUT traffic, maps routes, logs unknown
└────────┬────────┘
│
▼
┌─────────────────┐
│ openfut-core │ ← offline FUT backend: profiles, packs, squads, SBCs
└─────────────────┘
│
▼
SQLite database
Core is game-independent. It speaks a clean REST API and knows nothing about FIFA 23 internals.
Bridge is FIFA-specific. It speaks FIFA 23's wire protocol and translates it into Core API calls. Bridge is where all reverse engineering work happens.
Current Status
| Feature | Status |
|---|---|
| Local profiles + clubs | ✅ Working |
| Coin system | ✅ Working |
| Pack generator | ✅ Working |
| Card collection | ✅ Working |
| Squad builder | ✅ Working |
| Objectives engine | ✅ Working |
| SBC engine | ✅ Working |
| Match rewards | ✅ Working |
| NPC transfer market | ✅ Working |
| Statistics | ✅ Working |
| FIFA 23 integration | 🔴 Reverse engineering in progress |
| Chemistry calculation | 🟡 In progress |
| Full Draft mode | 🟡 In progress |
| Squad Battles AI generator | 🟡 In progress |
| Objectives claim flow | 🟡 In progress |
Running
# Start the offline backend
cd openfut-core
cargo run
# Start the proxy (for traffic capture / FIFA integration)
cd openfut-bridge
cargo run
Core listens on http://127.0.0.1:8080 by default.
Bridge listens on http://127.0.0.1:8443 by default.
Design Principles
- Offline-first. No EA account required. No internet connection needed.
- Single-player only. This is not a multiplayer server emulator.
- Data-driven. All cards, packs, SBCs, and objectives are JSON files. Everything is moddable.
- Clean architecture. Core has zero knowledge of FIFA 23. Bridge has zero game logic.
- No copyrighted assets. No real player images, no EA trademarks in data files.
Disclaimer
This project is not affiliated with EA Sports. You must own FIFA 23 legitimately to use this software. This project does not bypass any ownership verification and is intended only to restore offline playability of a game whose online services have been retired.