Merge pull request #275 from saphid/docs/framey-localsend-arm64

Framey: verify a reproducible ARM64 LocalSend core in isolation
2026-10-26 14:02:09 +01:00 · 2026-10-26 00:58:53 +00:00
commit 76f619280a
@@ -0,0 +1,97 @@
+{
+  "checkedAtUtc": "2026-10-26",
+  "plugin": {
+    "id": 125,
+    "name": "Decky Localsend",
+    "officialArchiveStatus": "x86_64; blocked; no substitutions or safeguard changes"
+  },
+  "source": {
+    "url": "https://github.com/MoYoez/LocalSend-Go",
+    "revision": "66edc509a28b9f877e7374504892dcbc653a4da4",
+    "license": "MIT",
+    "licenseUrl": "https://github.com/MoYoez/LocalSend-Go/blob/66edc509a28b9f877e7374504892dcbc653a4da4/LICENSE",
+    "pluginLicense": "BSD-3-Clause; distinct from the MIT helper",
+    "officialElfBuildInfo": "Go 1.25.7, CGO_ENABLED=0, GOARCH=amd64; no embedded VCS revision. Exact source correspondence unproven."
+  },
+  "build": {
+    "toolchain": "go1.25.7",
+    "environment": {
+      "GOTOOLCHAIN": "go1.25.7",
+      "CGO_ENABLED": "0",
+      "GOOS": "linux",
+      "GOARCH": "arm64"
+    },
+    "command": "go build -trimpath -o localsend-core .",
+    "elfMachine": 183,
+    "architecture": "aarch64",
+    "staticallyLinked": true,
+    "sha256": "e79238f6051ce34f172f765ae918d3d902b819e27377989a55e5b1eba10e46f9",
+    "rebuildSha256Matches": true
+  },
+  "realFrame": {
+    "os": "Frame OS 0.5.6 ARM64",
+    "sharedLockOwner": "kp0z857q58-live-steam-reads-20261026",
+    "helpExitCode": 0,
+    "officialBackendFlagsAllRecognized": true,
+    "helpFlags": [
+      "-doNotMakeSessionFolder",
+      "-log",
+      "-scanTimeout",
+      "-skipNotify",
+      "-useAlias",
+      "-useAutoSave",
+      "-useAutoSaveFromFavorites",
+      "-useConfigPath",
+      "-useDefaultUploadFolder",
+      "-useDownload",
+      "-useHttp",
+      "-useMultcastAddress",
+      "-useMultcastPort",
+      "-usePin",
+      "-useReferNetworkInterface",
+      "-useWebOutPath"
+    ],
+    "runtimeExitCode": 0,
+    "isolation": "unshare -Urn; loopback and private veth pair only; no external interface/default route",
+    "receiving": "-useAutoSave=false and -useAutoSaveFromFavorites=false; no upload/transfer requests",
+    "notifications": "-skipNotify",
+    "readOnlyRequest": "GET http://127.0.0.1:53317/api/localsend/v2/info",
+    "result": {
+      "ok": true,
+      "protocolVersion": "2.0",
+      "deviceType": "headless",
+      "responseKeys": [
+        "alias",
+        "deviceModel",
+        "deviceType",
+        "download",
+        "fingerprint",
+        "version"
+      ],
+      "aliasMatches": true
+    },
+    "cleanup": {
+      "helperExited": true,
+      "filesCreated": [
+        "config.yaml",
+        "helper.log"
+      ]
+    },
+    "privateDirectoryAbsent": true,
+    "servicesInstalledOrStarted": false,
+    "powerChanges": false,
+    "sharedLockReleasedAfterTests": true,
+    "independentReacquireAudit": "Deferred: another job had acquired the shared lock; it was left untouched. The helper process exited and TemporaryDirectory removal completed within the original locked probe."
+  },
+  "failedProbe": {
+    "interface": "loopback only",
+    "result": "Upstream rejects lo as a discovery interface and exits. Repeated with a veth pair wholly inside the private namespace; no source changes."
+  },
+  "unverified": [
+    "Exact source correspondence to shipped official ELF",
+    "Unmodified official Python backend invoking this ARM64 artifact",
+    "HTTPS, discovery on real network, pairing and file transfers",
+    "Framey frontend/proxy protocol integration",
+    "Worn VR/controller/keyboard"
+  ]
+}
@@ -0,0 +1,57 @@
+# LocalSend ARM64 build and isolated Frame probe
+
+The official Decky Localsend archive remains **broken/blocked**: its helper is
+x86_64. A source rebuild is now proven to execute on the ARM64 Frame and answer
+the LocalSend 2.0 info endpoint. This is a core runtime result, not a working
+official-plugin or file-transfer claim. [Machine-readable evidence](framey-localsend-arm64-2026-10-26.json)
+records the exact scope and cleanup.
+
+## Reproduce the build
+
+The helper is MIT-licensed; the separate official Python plugin is BSD-3-Clause.
+Use the pinned helper source and retain its license for any redistribution.
+No binary is redistributed in Frame Control, and no installer digest or
+architecture safeguard was changed.
+
+```sh
+framey_build_dir=$(mktemp -d)
+git clone https://github.com/MoYoez/LocalSend-Go "$framey_build_dir/source"
+git -C "$framey_build_dir/source" checkout --detach 66edc509a28b9f877e7374504892dcbc653a4da4
+cd "$framey_build_dir/source"
+env GOTOOLCHAIN=go1.25.7 CGO_ENABLED=0 GOOS=linux GOARCH=arm64 \
+  go build -trimpath -o "$framey_build_dir/localsend-core" .
+sha256sum "$framey_build_dir/localsend-core"
+```
+
+Two builds produced the same static aarch64 ELF SHA-256:
+`e79238f6051ce34f172f765ae918d3d902b819e27377989a55e5b1eba10e46f9`.
+The official ELF uses Go 1.25.7 too, but embeds no VCS revision, so the exact
+source correspondence is still unproven. The rebuilt helper recognizes every
+CLI flag supplied by the official Python backend.
+
+## Real Frame scope
+
+Tests ran under the normal atomic `/tmp/frame-test.lock` with a private temporary
+directory. `-h` exited before configuration or networking. For the health probe,
+`unshare -Urn` created a private user/network namespace with loopback and a veth
+pair entirely inside it: no external interface or default route. The veth used
+the documentation-only `192.0.2.1/24` address. Upstream rejects a loopback-only
+discovery interface, which is why the second isolated attempt used a veth.
+
+The helper used a private config/upload path, `-skipNotify`,
+`-useAutoSave=false`, `-useAutoSaveFromFavorites=false`, `-useHttp=true`,
+`-useReferNetworkInterface probe0` and `-scanTimeout 1`. The test client sent only
+`GET /api/localsend/v2/info` over loopback; it returned version `2.0`, device type
+`headless` and the private test alias. No upload, transfer, pairing or external
+discovery request ran. The helper exited; its private config/log and executable
+directory were removed; no service or power setting changed. The lock was
+released. An independent cleanup reacquisition found another job's lock and
+left it alone; cleanup success comes from the original probe's process wait and
+temporary-directory exit, not that deferred audit.
+
+Before enabling an ARM64 official package, verify the unmodified Python backend
+and frontend/proxy protocol with this source revision, then HTTPS, discovery and
+an explicitly safe private transfer. The official store must publish a matching
+ARM64 archive or Frame Control must gain a separately reviewed, digest-scoped
+build/package path. Compiling the core does not justify accepting the current
+x86 archive or marking the full plugin works.
@@ -279,6 +279,8 @@ DFL includes exports imported through decky-frontend-lib / @decky/ui. Steam stor

 All published Linux native payloads in this snapshot are x86_64; no published aarch64 payload was found. The three Windows DLLs belong to Decky-Framegen. The installer still rejects these archives. Apart from the explicitly described LocalSend experiment, ARM64 builds were not attempted: the constraints below remain unresolved.

+[LocalSend ARM64 build/runtime evidence](evidence/framey-localsend-arm64-2026-10-26.md) covers a reproducible MIT helper build and its isolated real-Frame protocol 2.0 info response. The official x86 archive remains blocked; full plugin integration and file transfers are unverified.
+
 | Plugin | Native payloads | ARM64 result / remaining blocker |
 | --- | --- | --- |
 | Fantastic | bin/backend | Fan backend/driver is Deck-specific; an ARM64 rebuild would not provide compatible Frame hardware. |
@@ -302,7 +304,7 @@ All published Linux native payloads in this snapshot are x86_64; no published aa
 | HueSync | bin/hello, py_modules/portio.so | portio and handheld LED backends depend on x86 I/O/unsupported hardware; ARM64 compilation alone is insufficient. |
 | Decky Clipboard | bin/xclip | xclip needs ARM64 X11 libraries/server; root and gamescope assumptions also block this archive. |
 | Reroll | bin/memscan.so | memscan.so needs ARM64 process-memory support and ABI testing; root requirement remains. Frontend initializes but no memory access was tested. |
-| Decky Localsend | bin/localsend-core | LocalSend-Go commit 66edc509a28b9f877e7374504892dcbc653a4da4 cross-compiled successfully with CGO_ENABLED=0 GOOS=linux GOARCH=arm64. Static aarch64 ELF SHA-256 e79238f6051ce34f172f765ae918d3d902b819e27377989a55e5b1eba10e46f9. Not executed; source tip is not proven to match the shipped helper/protocol. Official ZIP is still x86_64. |
+| Decky Localsend | bin/localsend-core | MIT LocalSend-Go 66edc509a28b9f877e7374504892dcbc653a4da4 reproducibly cross-built with Go 1.25.7/CGO_ENABLED=0 for ARM64; SHA-256 e79238f6051ce34f172f765ae918d3d902b819e27377989a55e5b1eba10e46f9. Help/official backend CLI flags and protocol 2.0 info endpoint passed on real Frame in an isolated network namespace. No file transfer or full plugin/CEF integration tested; exact source match to shipped helper unproven. Official ZIP stays x86_64 and blocked. |
 | Launch Options | bin/hello | Remove the template x86 bin/hello or publish an ARM64 rebuild; missing Steam module mapping also prevents frontend initialization. |
 | Decky-Clipper | bin/gstreamer-1.0/libgstproxy.so, bin/gstreamer-1.0/libgstmidi.so, bin/gstreamer-1.0/libgstmpegtsmux.so, bin/gstreamer-1.0/gst-plugin-scanner, bin/gstreamer-1.0/libgstivfparse.so, … 115 total; full list in JSON | Rebuild all bundled GStreamer libraries/plugins for ARM64 and verify capture/codec ABI against Frame SteamVR; gamescope capture differs. |

@@ -85,6 +85,9 @@ def render(data):
        'All published Linux native payloads in this snapshot are x86_64; no published aarch64 payload was found. '
        'The three Windows DLLs belong to Decky-Framegen. The installer still rejects these archives. '
        'Apart from the explicitly described LocalSend experiment, ARM64 builds were not attempted: the constraints below remain unresolved.', '',
+        '[LocalSend ARM64 build/runtime evidence](evidence/framey-localsend-arm64-2026-10-26.md) '
+        'covers a reproducible MIT helper build and its isolated real-Frame protocol 2.0 info response. '
+        'The official x86 archive remains blocked; full plugin integration and file transfers are unverified.', '',
        '| Plugin | Native payloads | ARM64 result / remaining blocker |', '| --- | --- | --- |']
    for p in data['plugins']:
        if p['native']:
@@ -10897,7 +10897,7 @@
      },
      "backend": "Python + native payload",
      "hardware": "No specific hardware requirement detected statically; runtime requirements unverified.",
-      "nativePort": "LocalSend-Go commit 66edc509a28b9f877e7374504892dcbc653a4da4 cross-compiled successfully with CGO_ENABLED=0 GOOS=linux GOARCH=arm64. Static aarch64 ELF SHA-256 e79238f6051ce34f172f765ae918d3d902b819e27377989a55e5b1eba10e46f9. Not executed; source tip is not proven to match the shipped helper/protocol. Official ZIP is still x86_64.",
+      "nativePort": "MIT LocalSend-Go 66edc509a28b9f877e7374504892dcbc653a4da4 reproducibly cross-built with Go 1.25.7/CGO_ENABLED=0 for ARM64; SHA-256 e79238f6051ce34f172f765ae918d3d902b819e27377989a55e5b1eba10e46f9. Help/official backend CLI flags and protocol 2.0 info endpoint passed on real Frame in an isolated network namespace. No file transfer or full plugin/CEF integration tested; exact source match to shipped helper unproven. Official ZIP stays x86_64 and blocked.",
      "uiSurfaces": [
        "local/Steam routes",
        "toasts",