Struct ntp_proto::SystemConfig

pub struct SystemConfig {
    pub min_intersection_survivors: usize,
    pub panic_threshold: StepThreshold,
    pub startup_panic_threshold: StepThreshold,
    pub accumulated_threshold: Option<NtpDuration>,
    pub local_stratum: u8,
    pub poll_limits: PollIntervalLimits,
    pub initial_poll: PollInterval,
}

Fields

min_intersection_survivors: usize

Minimum number of survivors needed to be able to discipline the system clock. More survivors (so more servers from which to get the time) means a more accurate time.

The spec notes (CMIN was renamed to MIN_INTERSECTION_SURVIVORS in our implementation):

CMIN defines the minimum number of servers consistent with the correctness requirements. Suspicious operators would set CMIN to ensure multiple redundant servers are available for the algorithms to mitigate properly. However, for historic reasons the default value for CMIN is one.

panic_threshold: StepThreshold

The maximum amount the system clock is allowed to change in a single go before we conclude something is seriously wrong. This is used to limit the changes to the clock to reasonable ammounts, and stop issues with remote servers from causing us to drift too far.

Note that this is not used during startup. To limit system clock changes during startup, use startup_panic_threshold

startup_panic_threshold: StepThreshold

The maximum amount the system clock is allowed to change during startup. This can be used to limit the impact of bad servers if the system clock is known to be reasonable on startup

accumulated_threshold: Option<NtpDuration>

The maximum amount distributed amongst all steps except at startup the daemon is allowed to step the system clock.

local_stratum: u8

Stratum of the local clock, when not synchronized through ntp. This can be used in servers to indicate that there are external mechanisms synchronizing the clock

poll_limits: PollIntervalLimits

Minima and maxima for the poll interval of clients

initial_poll: PollInterval

Initial poll interval of the system

Trait Implementations

impl Clone for SystemConfig

fn clone(&self) -> SystemConfig

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SystemConfig

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

Formats the value using the given formatter.

impl Default for SystemConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SystemConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Copy for SystemConfig