| 420 | } |
| 421 | |
| 422 | func (device *Device) IpcHandle(socket net.Conn) { |
| 423 | defer socket.Close() |
| 424 | |
| 425 | buffered := func(s io.ReadWriter) *bufio.ReadWriter { |
| 426 | reader := bufio.NewReader(s) |
| 427 | writer := bufio.NewWriter(s) |
| 428 | return bufio.NewReadWriter(reader, writer) |
| 429 | }(socket) |
| 430 | |
| 431 | for { |
| 432 | op, err := buffered.ReadString('\n') |
| 433 | if err != nil { |
| 434 | return |
| 435 | } |
| 436 | |
| 437 | // handle operation |
| 438 | switch op { |
| 439 | case "set=1\n": |
| 440 | err = device.IpcSetOperation(buffered.Reader) |
| 441 | case "get=1\n": |
| 442 | var nextByte byte |
| 443 | nextByte, err = buffered.ReadByte() |
| 444 | if err != nil { |
| 445 | return |
| 446 | } |
| 447 | if nextByte != '\n' { |
| 448 | err = ipcErrorf(ipc.IpcErrorInvalid, "trailing character in UAPI get: %q", nextByte) |
| 449 | break |
| 450 | } |
| 451 | err = device.IpcGetOperation(buffered.Writer) |
| 452 | default: |
| 453 | if fun, ok := device.IpcHandler[op]; ok { |
| 454 | err = fun(buffered) |
| 455 | break |
| 456 | } |
| 457 | device.Log.Errorf("invalid UAPI operation: %v", op) |
| 458 | return |
| 459 | } |
| 460 | |
| 461 | // write status |
| 462 | if errors.Is(err, ErrIPCStatusHandled) { |
| 463 | err = nil |
| 464 | continue |
| 465 | } |
| 466 | var status *IPCError |
| 467 | if err != nil && !errors.As(err, &status) { |
| 468 | // shouldn't happen |
| 469 | status = ipcErrorf(ipc.IpcErrorUnknown, "other UAPI error: %w", err) |
| 470 | } |
| 471 | if status != nil { |
| 472 | device.Log.Errorf("%v", status) |
| 473 | fmt.Fprintf(buffered, "errno=%d\n\n", status.ErrorCode()) |
| 474 | } else { |
| 475 | fmt.Fprintf(buffered, "errno=0\n\n") |
| 476 | } |
| 477 | buffered.Flush() |
| 478 | } |
| 479 | } |