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PortSummaryThresholds

tor_netdoc::types::policy

Struct PortSummaryThresholds 

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pub struct PortSummaryThresholds {
    pub v4: u128,
    pub v6: u128,
}
Expand description

Thresholds for deciding whether a port counts as open, for a summary

Each value is the maximum number of individual addresses that may be blocked before the port is considered closed.

The Default implementation, and PortSummaryThresholds::DEFAULT, provide the thresholds currently specified in torspec.

We provide this as a controllable parameter so that the summariser is a pure function that doesn’t embed these tuneables. Then if the spec changes, the directory authority consensus calculator can provide the appropriate thresholds depending on the consensus method.

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§v4: u128

IPv4

Currently, the spec says

no more than 2^25 IPv4 addresses (two /8’s worth, or one /7’s worth)

§v6: u128

IPv6

Currently, the spec says

no more than 2^112 IPv6 addresses (one /16’s worth)

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impl PortSummaryThresholds

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pub const DEFAULT: PortSummaryThresholds

Default value, from the Tor Specifications

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pub const fn from_prefix_lengths( v4_prefix_len: u8, v6_prefix_len: u8, ) -> PortSummaryThresholds

PortSummaryThresholds from prefix lengths

Returns a PortSummaryThresholds whose thresholds are “one /v4’s worth” for IPv4 and “one /v6’s worth” for IPv6.

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impl Clone for PortSummaryThresholds

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for PortSummaryThresholds

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

Formats the value using the given formatter. Read more
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impl Default for PortSummaryThresholds

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Eq for PortSummaryThresholds

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impl Hash for PortSummaryThresholds

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for PortSummaryThresholds

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl StructuralPartialEq for PortSummaryThresholds

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