mirror of
https://github.com/DorkSquadRR/DorkNet.git
synced 2026-10-26 07:28:45 -07:00
Alexa
82 lines
3.6 KiB
Markdown
82 lines
3.6 KiB
Markdown
# DorkNet ProtoDumper
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Runtime extractor for Rec Room's Google.Protobuf schema (room save /
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creation / circuits data model). Produces clean `.proto` files for any
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client build — including obfuscated ones like 2023.03.21 where static
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reconstruction from `global-metadata.dat` is unreliable (the descriptor
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base64 is split into scattered string-literal chunks whose concat order
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only lives in IL).
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At runtime every `FileDescriptor` still carries its original,
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un-obfuscated `FileDescriptorProto` (real message names, field names,
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numbers and types intact). The catch: Rec Room builds these descriptors
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**lazily and in a specific dependency order** as content loads. Trying to
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force-build them by reading a message type's static descriptor out of
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order throws inside the type's static constructor, and the failure is
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cached — *poisoning* the type (and crashing the client). So this mod does
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**not** enumerate types.
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Instead it Harmony-postfixes the one library method every generated cctor
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funnels through —
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`Google.Protobuf.Reflection.FileDescriptor.BuildFrom` /
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`.FromGeneratedCode` — and records each descriptor as the game builds it.
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Completely passive: **play the client through the content you care about**
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and every descriptor that loads is captured.
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## Pipeline
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1. **Build the mod**
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```sh
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dotnet build DorkNet.ProtoDumper/DorkNet.ProtoDumper.csproj -c Release
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```
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Output: `DorkNet.ProtoDumper/bin/Release/DorkNet.ProtoDumper.dll`.
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2. **Run it on a *runnable* 2023.03.21 client (MelonLoader 0.6.6)**
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> The `GameAssembly.dll` + `il2cpp_data`-only copy under
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> `Recnet-old/dist/RecRoom-2023.03.21-il2cpp/…/staging/` is an
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> **offline-analysis payload, not a runnable build**. Use a full build
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> with the exe + UnityPlayer + MelonLoader (e.g. the devdork package).
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- Drop `DorkNet.ProtoDumper.dll` into `<RecRoom>\Mods\`. On launch it
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installs the descriptor-build hooks (see `dump.log` / MelonLoader
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console for "installed N descriptor-build hooks").
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- **Log in and play through the content whose schema you want:** your
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dorm, a created room, the Maker Pen, and a circuits (CV2) board. Each
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subsystem builds its protos the first time it loads. Descriptors are
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captured the instant they build — no scene/timer scanning, nothing is
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force-built, so the client stays stable.
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- Output appears under `<RecRoom>\DorkNet-ProtoDump\` and is flushed to
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disk ~1 s after new descriptors load, and again on quit:
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- `manifest.tsv` — `<proto path>\t<base64>` per file
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- `files\*.b64` — same, one file each
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- `dump.log` — running capture count
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3. **Decode to .proto**
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```sh
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pip install protobuf
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python DorkNet.ProtoDumper/decode_dump.py <path>/manifest.tsv proto_out
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```
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Emits one `.proto` per descriptor under `proto_out/`, plus a combined
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`proto_out/recroom_2023.proto` (every rec_room/circuits message in one
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file) for an easy diff against
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`DorkNet.Server/Protos/recroom_2020.proto`.
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## Notes
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- No game DLLs are referenced at compile time. `FileDescriptor` is the
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Google.Protobuf *library* type (not obfuscated); it's reached by its
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original name with the Il2Cpp namespace-prefix fallback, and its members
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are read via reflection. The same DLL works across builds and stays clean
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of derivative game code.
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- The only Harmony patches are the two read-only descriptor-build
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postfixes above — safe to run alongside (or without) `DorkNet.ClientMod`.
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- The descriptor base64 is the same `FileDescriptorProto` wire format
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Google's own tooling emits, so `decode_dump.py` (or `protoc
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--decode=google.protobuf.FileDescriptorProto descriptor.proto`) reads it
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directly.
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