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GuardFilter

tor_guardmgr

Struct GuardFilter 

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pub struct GuardFilter {
    filters: Vec<SingleFilter>,
}
Expand description

An object specifying which relays are eligible to be guards.

We always restrict the set of possible guards to be the set of relays currently listed in the consensus directory document, and tagged with the Guard flag. But clients may narrow the eligible set even further—for example, to those supporting only a given set of ports, or to those in a given country.

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§filters: Vec<SingleFilter>

A list of filters to apply to guard or fallback selection. Each filter restricts which guards may be used, and possibly how those guards may be contacted.

This list of filters has “and” semantics: a relay is permitted by this filter if ALL patterns in this list permit that first hop.

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impl GuardFilter

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pub fn unfiltered() -> Self

Create a new GuardFilter that doesn’t restrict the set of permissible guards at all.

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pub fn push_reachable_addresses( &mut self, addrs: impl IntoIterator<Item = AddrPortPattern>, )

Restrict this filter to only permit connections to an address permitted by one of the patterns in addrs.

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pub(crate) fn permits<C: ChanTarget>(&self, target: &C) -> bool

Return true if this filter permits the provided target.

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pub(crate) fn modify_hop( &self, first_hop: FirstHop, ) -> Result<FirstHop, PickGuardError>

Modify first_hop so that it contains no elements not permitted by this filter.

(For example, if we are restricted only to use certain addresses, then permits will return true for a guard that has multiple addresses even if some of those addresses are not permitted. In that scenario, this method will remove disallowed addresses from first_hop.)

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pub(crate) fn is_unfiltered(&self) -> bool

Return true if this filter excludes no guards at all.

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pub(crate) fn frac_bw_permitted(&self, netdir: &NetDir) -> f64

Return a fraction between 0.0 and 1.0 describing what fraction of the guard bandwidth this filter permits.

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pub(crate) fn add_to_selector(&self, selector: &mut RelaySelector<'_>)

Update selector with all the restrictions from this filter.

Trait Implementations§

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impl Clone for GuardFilter

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fn clone(&self) -> GuardFilter

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 GuardFilter

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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 GuardFilter

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fn default() -> GuardFilter

Returns the “default value” for a type. Read more
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impl PartialEq for GuardFilter

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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

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

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impl StructuralPartialEq for GuardFilter

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