Struct TimestampFormat 

#[repr(C)]
pub struct TimestampFormat {
    pub seconds: u32,
    pub fraction: u32,
}

NTP Timestamp Format - Used in packet headers and other places with limited word size. It includes a 32-bit unsigned seconds field spanning 136 years and a 32-bit fraction field resolving 232 picoseconds.

The prime epoch is 0 h 1 January 1900 UTC, when all bits are zero.

Layout

 0                   1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                            Seconds                            |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                            Fraction                           |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Fields

seconds: u32

Seconds since 1900-01-01 00:00:00 UTC (32-bit unsigned).

fraction: u32

Fractional seconds (32-bit unsigned, resolution of ~232 picoseconds).

Trait Implementations

impl Clone for TimestampFormat

fn clone(&self) -> TimestampFormat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ConstPackedSizeBytes for TimestampFormat

const PACKED_SIZE_BYTES: usize = 8

The constant size in bytes when this type is packed for network transmission.

impl Debug for TimestampFormat

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

Formats the value using the given formatter.

impl Default for TimestampFormat

fn default() -> TimestampFormat

Returns the “default value” for a type.

impl From<Instant> for TimestampFormat

fn from(t: Instant) -> TimestampFormat

Converts a Unix Instant to a 32-bit NTP timestamp.

Note: This truncates to 32 bits, losing era information. The resulting protocol::TimestampFormat is correct for NTPv4 on-wire use, but the era must be inferred by the receiver using a pivot-based approach (see timestamp_to_instant).

impl From<TimestampFormat> for Instant

Available on crate feature std only.

fn from(t: TimestampFormat) -> Instant

Converts a 32-bit NTP timestamp to a Unix Instant, using the current system time as a pivot for era disambiguation.

This is correct for live NTP usage where timestamps are close to “now”. For offline or replay scenarios, use timestamp_to_instant with an explicit pivot.

impl FromBytes for TimestampFormat

fn from_bytes(buf: &[u8]) -> Result<(TimestampFormat, usize), ParseError>

Parse from the given byte slice. Returns the parsed value and the number of bytes consumed from the front of buf.

impl Hash for TimestampFormat

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for TimestampFormat

fn cmp(&self, other: &TimestampFormat) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for TimestampFormat

fn eq(&self, other: &TimestampFormat) -> 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 PartialOrd for TimestampFormat

fn partial_cmp(&self, other: &TimestampFormat) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl ReadFromBytes for TimestampFormat

fn read_from_bytes<R>(reader: R) -> Result<TimestampFormat, Error>

where R: ReadBytesExt,

Read the command from bytes.

impl ToBytes for TimestampFormat

fn to_bytes(&self, buf: &mut [u8]) -> Result<usize, ParseError>

Write this value into the given byte slice. Returns the number of bytes written. Fails with ParseError::BufferTooShort if buf is too short.

impl WriteToBytes for TimestampFormat

fn write_to_bytes<W>(&self, writer: W) -> Result<(), Error>

where W: WriteBytesExt,

Write the command to bytes.

impl Copy for TimestampFormat

impl Eq for TimestampFormat

impl StructuralPartialEq for TimestampFormat