Struct DispatchTable 

pub struct DispatchTable { /* private fields */ }

A mapping from function code bytes to boxed FunctionCodeHandlers.

Implementations

impl DispatchTable

pub fn new() -> Self

Create an empty dispatch table.

pub fn with_defaults() -> Self

Create a dispatch table pre-loaded with echo handlers for all nine standard function codes.

pub fn register(&mut self, handler: Box<dyn FunctionCodeHandler>)

Register (or replace) a handler.

pub fn dispatch(&self, req: &FunctionCodeRequest) -> FunctionCodeResponse

Dispatch a request to its registered handler.

If no handler is registered for req.code, an error response with Modbus exception code 0x01 (Illegal Function) is returned.

pub fn supported_codes(&self) -> Vec<u8>

Return a sorted list of all supported function code bytes.

pub fn is_supported(&self, code: u8) -> bool

true if a handler is registered for code.

pub fn handler_count(&self) -> usize

Number of registered handlers.

pub fn error_response( req: &FunctionCodeRequest, error_code: u8, ) -> FunctionCodeResponse

Build an error response: function code byte has bit 7 set, and the data contains the single error_code byte.

Trait Implementations

impl Default for DispatchTable

fn default() -> Self

Returns the “default value” for a type.