Enum NakProcedure 

pub enum NakProcedure {
    Immediate(Duration),
    Deferred(Duration),
}

The way the Nak procedure is implemented is the following:

• In Immediate mode, upon reception of each file data PDU, if the received segment is at the end of the file and there is a gap between the previously received segment and the new segment, a nak is sent with the new gap but only after delay has elapsed (if any delay was set). If the NAK timer has timed out, the nak sent covers the gaps from the entire file, not only the last gap. After the EOF is received, the procedure is the same as in deferred mode.
• In Deferred mode, a nak covering the gaps from the entire file is sent after the EOF has been received and each time the nak timer times out.

The delay parameter is useful when PDUs come out of order to avoid sending NAKs prematurely. One scenario when this may happen is when utilizing multiple links of different latencies. The delay should be set to cover the difference in latency between the slowest link and the fastest link. If the delay is greater than 0, the NAKs will not be sent immediately but only if the gap persists after the delay has passed.

NAK timer (note that this is different and probably much larger than the delay parameter mentioned above):

• In Immediate mode the NAK timer is started at the beginning of the transaction.
• In Deferred mode the NAK timer is started after EOF is received.
• If the NAK timer times out and it is determined that new data has been received since the last nak sending, the timer counter is reset to 0.
• If the NAK timer expired more than the predefined limit (without any new data being received), the NakLimitReached fault will be raised.

Variants

Immediate(Duration)

Deferred(Duration)

Trait Implementations

impl Clone for NakProcedure

fn clone(&self) -> NakProcedure

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for NakProcedure

impl Debug for NakProcedure

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

Formats the value using the given formatter.

impl Eq for NakProcedure

impl PartialEq for NakProcedure

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for NakProcedure