Enum TxPriority 

pub enum TxPriority {
    ImmediateAck,
    Forward,
    Retry,
    Application,
}

Priority class assigned to entries in the TxQueue.

The transmit queue services entries in priority order (lowest rank first) so that time-sensitive control traffic is never delayed by a backlog of application sends. Within the same priority class, entries are served in FIFO order by sequence number.

Priority levels from highest to lowest:

• ImmediateAck (rank 0) — MAC ACK frames generated in response to a received unicast or blind-unicast with ACK-requested. Must be sent as quickly as possible so the original sender’s retransmit timer does not expire.
• Forward (rank 1) — frames being forwarded by the repeater. Prompt forwarding feeds the sender’s forwarding-confirmation window, so delays here can trigger unnecessary retransmissions at the source.
• Retry (rank 2) — retransmissions of unacknowledged ACK-requested sends. These have already been delayed by a full forwarding-confirmation window and need to get out before the final ACK deadline expires.
• Application (rank 3) — new application-originated frames (queue_broadcast, queue_unicast, queue_multicast, etc.). Lowest priority; yields to all control traffic.

Variants

ImmediateAck

Immediate transport ACK.

Forward

Receive-triggered forwarding.

Retry

Retransmission after missed confirmation.

Application

Application-originated send.

Trait Implementations

impl Clone for TxPriority

fn clone(&self) -> TxPriority

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TxPriority

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

Formats the value using the given formatter.

impl PartialEq for TxPriority

fn eq(&self, other: &TxPriority) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for TxPriority

impl Eq for TxPriority

impl StructuralPartialEq for TxPriority