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Improve USB disconnection handling and add payload length validation for USB frames

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just_stuff_tm 2026-03-02 03:24:19 -05:00 • committed by just-stuff-tm
parent 3542adad1d
commit 3cec3dc233
2 changed files with 13 additions and 2 deletions
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8
android/app/src/main/kotlin/com/meshcore/meshcore_open/MainActivity.kt
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@ -105,8 +105,12 @@ class MainActivity : FlutterActivity() {
"connect" -> handleUsbConnect(call, result)
"write" -> handleUsbWrite(call, result)
"disconnect" -> {
closeUsbConnection()
result.success(null)
usbIoExecutor.execute {
closeUsbConnection()
mainHandler.post {
result.success(null)
}
}
}
else -> result.notImplemented()
}

7
lib/services/usb_serial_frame_codec.dart
View file

@ -6,6 +6,13 @@ const int usbSerialHeaderLength = 3;
const int usbSerialMaxPayloadLength = 172;
Uint8List wrapUsbSerialTxFrame(Uint8List payload) {
if (payload.length > usbSerialMaxPayloadLength) {
throw ArgumentError.value(
payload.length,
'payload.length',
'USB serial payload exceeds $usbSerialMaxPayloadLength bytes',
);
}
final packet = Uint8List(usbSerialHeaderLength + payload.length);
packet[0] = usbSerialTxFrameStart;
packet[1] = payload.length & 0xff;