Struct SenderMachine 

pub struct SenderMachine<const WIN: usize, const BUF: usize, const MTU: usize> { /* private fields */ }

Sender state machine.

Handles segmentation, buffering, and retransmission. Completely synchronous - no I/O, no async.

Type Parameters

• WIN - Maximum number of in-flight packets (window size)
• BUF - Total send buffer size in bytes
• MTU - Maximum transmission unit (packet size)

Implementations

impl<const WIN: usize, const BUF: usize, const MTU: usize> SenderMachine<WIN, BUF, MTU>

pub fn new(config: SenderConfig) -> Self

Create a new sender state machine with the given configuration.

pub fn config(&self) -> &SenderConfig

Returns a reference to the sender configuration.

pub fn max_payload_per_packet(&self) -> usize

Maximum payload bytes per packet given the MTU and header overhead.

pub fn available_bytes(&self) -> usize

Available space in the send buffer (bytes).

pub fn available_window(&self) -> usize

Available slots in send window.

pub fn unacked_count(&self) -> usize

Number of unacked packets.

pub fn is_idle(&self) -> bool

Check if all data has been acknowledged.

pub fn get_payload(&self, seq: SequenceCount) -> Option<PayloadInfo<'_>>

Retrieve payload info for a buffered packet by sequence number.

pub fn handle( &mut self, event: SenderEvent<'_>, actions: &mut SenderActions, ) -> Result<(), SenderError>

Process an event and produce actions.

pub fn mark_transmitted(&mut self, seq: SequenceCount)

Mark a packet as transmitted (awaiting ACK).

Call this after sending a packet from a Transmit action.