Struct MbapCodec 

pub struct MbapCodec;

MBAP codec for Modbus/TCP framing.

Handles the 7-byte MBAP header (transaction ID, protocol ID, length, unit ID) followed by the PDU (function code + data). The decoder validates the protocol identifier and length field before yielding a Frame.

Trait Implementations

impl Debug for MbapCodec

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Decoder for MbapCodec

type Item = Frame

The type of decoded frames.

type Error = FrameError

The type of unrecoverable frame decoding errors.

fn decode( &mut self, src: &mut BytesMut, ) -> Result<Option<Self::Item>, Self::Error>

Attempts to decode a frame from the provided buffer of bytes.

fn decode_eof( &mut self, buf: &mut BytesMut, ) -> Result<Option<Self::Item>, Self::Error>

A default method available to be called when there are no more bytes available to be read from the underlying I/O.

fn framed<T>(self, io: T) -> Framed<T, Self>

where T: AsyncRead + AsyncWrite, Self: Sized,

Provides a Stream and Sink interface for reading and writing to this Io object, using Decode and Encode to read and write the raw data.

impl Default for MbapCodec

fn default() -> MbapCodec

Returns the “default value” for a type.

impl Encoder<(MbapHeader, Bytes)> for MbapCodec

Convenience Encoder implementation for (MbapHeader, Bytes) tuples.

This allows callers to encode a header and PDU without constructing a full Frame.

type Error = FrameError

The type of encoding errors.

fn encode( &mut self, item: (MbapHeader, Bytes), dst: &mut BytesMut, ) -> Result<(), Self::Error>

Encodes a frame into the buffer provided.

impl Encoder<Frame> for MbapCodec

type Error = FrameError

The type of encoding errors.

fn encode( &mut self, frame: Frame, dst: &mut BytesMut, ) -> Result<(), Self::Error>

Encodes a frame into the buffer provided.