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NoCache

mail_auth::dns::cache

Struct NoCache

pub struct NoCache;

Expand description

A cache that stores nothing.

Implements both ResolverCache (every lookup misses) and DnsCache (every accessor returns None). It is the default cache type of Parameters.

Trait Implementations§

impl Clone for NoCache

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

impl Copy for NoCache

impl Debug for NoCache

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

Formats the value using the given formatter. Read more

impl Default for NoCache

fn default() -> Self

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

impl DnsCache for NoCache

type Txt = NoCache

Cache for parsed TXT records (SPF, DKIM, DMARC, ATPS, MTA-STS, TLSRPT), keyed by fully qualified domain name.

type Mx = NoCache

Cache for MX records and negative MX answers, keyed by fully qualified domain name.

type Ipv4 = NoCache

Cache for A records and negative A answers, keyed by fully qualified domain name.

type Ipv6 = NoCache

Cache for AAAA records and negative AAAA answers, keyed by fully qualified domain name.

type Ptr = NoCache

Cache for PTR records and negative PTR answers, keyed by IP address.

fn txt(&self) -> Option<&Self::Txt>

Returns the TXT record cache, or None to disable it.

fn mx(&self) -> Option<&Self::Mx>

Returns the MX record cache, or None to disable it.

fn ipv4(&self) -> Option<&Self::Ipv4>

Returns the A record cache, or None to disable it.

fn ipv6(&self) -> Option<&Self::Ipv6>

Returns the AAAA record cache, or None to disable it.

fn ptr(&self) -> Option<&Self::Ptr>

Returns the PTR record cache, or None to disable it.

impl Eq for NoCache

impl PartialEq for NoCache

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

impl<K, V> ResolverCache<K, V> for NoCache

fn get<Q>(&self, _: &Q) -> Option<V>
where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

Returns a copy of the cached value for name, or None if there is none. Implementations should return None for expired entries.

fn remove<Q>(&self, _: &Q) -> Option<V>
where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

Removes the entry for name and returns its value. Not called by this crate; available to applications that invalidate entries.

fn insert(&self, _: K, _: V, _: Instant)

Stores value under key. valid_until is the expiry time derived from the TTLs of the DNS answer, or from its negative TTL for a negative answer.

impl StructuralPartialEq for NoCache

Auto Trait Implementations§

impl Freeze for NoCache

impl RefUnwindSafe for NoCache

impl Send for NoCache

impl Sync for NoCache

impl Unpin for NoCache

impl UnsafeUnpin for NoCache

impl UnwindSafe for NoCache

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = !

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, !>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more